diff --git a/frontend/src/App.css b/frontend/src/App.css
index b7e647c..37fcd47 100644
--- a/frontend/src/App.css
+++ b/frontend/src/App.css
@@ -2,7 +2,7 @@
 
 .boot {
   display: flex; align-items: center; justify-content: center;
-  height: 100vh; color: #888; font-size: 14px;
+  height: 100vh; color: var(--c-gray-500); font-size: var(--text-md);
 }
 
 /* `100dvh` is the dynamic viewport height — adjusts as iOS Safari's
@@ -17,47 +17,47 @@
 .app { height: 100vh; height: 100dvh; display: flex; flex-direction: column; }
 
 .app-header {
-  height: 48px; flex-shrink: 0;
-  background: #1a1a1a; color: #fff;
+  height: var(--header-height); flex-shrink: 0;
+  background: var(--color-header-bg); color: var(--color-text-inverse);
   display: flex; align-items: center; justify-content: space-between;
   padding: 0 20px;
 }
-.app-brand a { color: #fff; text-decoration: none; font-weight: 600; font-size: 14px; }
-.header-right { display: flex; align-items: center; gap: 12px; font-size: 13px; }
-.user-name { color: #ddd; }
+.app-brand a { color: var(--c-white); text-decoration: none; font-weight: 600; font-size: var(--text-md); }
+.header-right { display: flex; align-items: center; gap: 12px; font-size: var(--text-base); }
+.user-name { color: var(--c-gray-300); }
 .user-role-badge {
-  font-size: 10px; font-weight: 700;
+  font-size: var(--text-2xs); font-weight: 700;
   text-transform: uppercase; letter-spacing: 0.06em;
-  padding: 2px 6px; border-radius: 4px;
-  background: rgba(255,255,255,0.15);
+  padding: 2px 6px; border-radius: var(--radius-sm);
+  background: var(--color-on-dark-soft);
 }
-.role-owner { background: #b45309; }
-.role-admin { background: #4338ca; }
+.role-owner { background: var(--c-warning-accent); }
+.role-admin { background: var(--c-accent-strong); }
 
 .btn-link {
-  color: #fff; text-decoration: none;
-  background: rgba(255,255,255,0.15);
-  border-radius: 6px; padding: 4px 10px;
-  font-size: 13px;
+  color: var(--c-white); text-decoration: none;
+  background: var(--color-on-dark-soft);
+  border-radius: var(--radius-md); padding: 4px 10px;
+  font-size: var(--text-base);
 }
-.btn-link:hover { background: rgba(255,255,255,0.25); }
+.btn-link:hover { background: var(--color-on-dark-hover); }
 
 .btn-signin-header {
-  color: #fff; text-decoration: none;
-  background: rgba(255,255,255,0.15);
-  border-radius: 6px; padding: 4px 10px;
-  font-size: 13px;
+  color: var(--c-white); text-decoration: none;
+  background: var(--color-on-dark-soft);
+  border-radius: var(--radius-md); padding: 4px 10px;
+  font-size: var(--text-base);
   display: inline-flex; align-items: center; gap: 6px;
 }
-.btn-signin-header:hover { background: rgba(255,255,255,0.25); }
+.btn-signin-header:hover { background: var(--color-on-dark-hover); }
 
 /* Beta chip — small uppercase tag sitting alongside a button label or
  * link. Renders well on both dark headers and light surfaces. */
 .beta-chip {
   font-size: 9px; font-weight: 700;
   text-transform: uppercase; letter-spacing: 0.08em;
-  padding: 1px 5px; border-radius: 3px;
-  background: #b45309; color: #fff;
+  padding: 1px 5px; border-radius: var(--radius-sm);
+  background: var(--c-warning-accent); color: var(--c-white);
   line-height: 1.5;
   vertical-align: middle;
 }
@@ -73,44 +73,44 @@
 
 .catalog {
   width: 320px; flex-shrink: 0;
-  background: #fff; border-right: 1px solid #e5e5e5;
+  background: var(--c-white); border-right: 1px solid var(--c-gray-200);
   display: flex; flex-direction: column;
   overflow: hidden;
 }
 
 .catalog-search {
   padding: 12px 14px;
-  border-bottom: 1px solid #f0f0ee;
+  border-bottom: 1px solid var(--c-gray-150);
 }
 .catalog-search input {
-  width: 100%; border: 1px solid #e5e5e5; border-radius: 6px;
-  padding: 6px 10px; font-size: 13px; outline: none;
+  width: 100%; border: 1px solid var(--c-gray-200); border-radius: var(--radius-md);
+  padding: 6px 10px; font-size: var(--text-base); outline: none;
 }
-.catalog-search input:focus { border-color: #1a1a1a; }
+.catalog-search input:focus { border-color: var(--c-ink); }
 
 .catalog-controls {
   display: flex; align-items: center; gap: 8px;
   padding: 8px 14px;
-  border-bottom: 1px solid #f0f0ee;
-  font-size: 12px; color: #555;
+  border-bottom: 1px solid var(--c-gray-150);
+  font-size: var(--text-sm); color: var(--c-gray-500);
 }
 .catalog-controls select {
-  border: 1px solid #e5e5e5; border-radius: 4px;
-  font-size: 12px; padding: 2px 4px;
+  border: 1px solid var(--c-gray-200); border-radius: var(--radius-sm);
+  font-size: var(--text-sm); padding: 2px 4px;
 }
 
 .catalog-chips {
   display: flex; flex-wrap: wrap; gap: 4px;
   padding: 6px 14px 10px;
-  border-bottom: 1px solid #f0f0ee;
+  border-bottom: 1px solid var(--c-gray-150);
 }
 .chip {
-  font-size: 11px;
-  background: #f0f0ee; color: #444;
-  border: 1px solid transparent; border-radius: 999px;
+  font-size: var(--text-xs);
+  background: var(--c-gray-150); color: var(--c-gray-600);
+  border: 1px solid transparent; border-radius: var(--radius-pill);
   padding: 2px 9px; cursor: pointer;
 }
-.chip.active { background: #1a1a1a; color: #fff; border-color: #1a1a1a; }
+.chip.active { background: var(--c-ink); color: var(--c-white); border-color: var(--c-ink); }
 
 .catalog-list { flex: 1; overflow-y: auto; padding: 4px 0; }
 
@@ -120,66 +120,66 @@
   border: none; background: none; text-align: left; cursor: pointer;
   border-left: 3px solid transparent; width: 100%;
 }
-.catalog-row:hover { background: #f7f7f5; }
-.catalog-row.active { background: #f0f0ee; border-left-color: #1a1a1a; }
+.catalog-row:hover { background: var(--c-gray-100); }
+.catalog-row.active { background: var(--c-gray-150); border-left-color: var(--c-ink); }
 .catalog-row .row-top { display: flex; align-items: center; gap: 6px; }
 .row-id {
-  font-size: 10px; font-weight: 700;
-  color: #888; text-transform: uppercase;
+  font-size: var(--text-2xs); font-weight: 700;
+  color: var(--c-gray-500); text-transform: uppercase;
   letter-spacing: 0.04em;
 }
-.row-id.super { color: #b45309; }
-.row-title { font-size: 13px; margin-top: 2px; }
-.catalog-row.is-super .row-title { color: #555; }
-.row-tags { font-size: 11px; color: #999; margin-top: 2px; }
+.row-id.super { color: var(--c-warning-accent); }
+.row-title { font-size: var(--text-base); margin-top: 2px; }
+.catalog-row.is-super .row-title { color: var(--c-gray-500); }
+.row-tags { font-size: var(--text-xs); color: var(--c-gray-500); margin-top: 2px; }
 
 .catalog-pending {
-  border-top: 1px solid #f0f0ee;
+  border-top: 1px solid var(--c-gray-150);
   flex-shrink: 0;
-  background: #fafaf8;
+  background: var(--c-gray-50);
 }
 .pending-header {
   display: flex; align-items: center; justify-content: space-between;
   padding: 8px 14px;
-  font-size: 11px; font-weight: 700;
+  font-size: var(--text-xs); font-weight: 700;
   text-transform: uppercase; letter-spacing: 0.06em;
-  color: #888;
+  color: var(--c-gray-500);
   cursor: pointer;
   background: none; border: none; width: 100%; text-align: left;
 }
 .pending-count {
-  background: #e5e5e5; color: #333;
-  border-radius: 999px;
-  padding: 1px 8px; font-size: 11px;
+  background: var(--c-gray-200); color: var(--c-gray-700);
+  border-radius: var(--radius-pill);
+  padding: 1px 8px; font-size: var(--text-xs);
 }
 .pending-list { padding: 2px 0 8px; }
 .pending-row {
   display: block;
   padding: 6px 14px;
-  font-size: 13px; color: #444; text-decoration: none;
+  font-size: var(--text-base); color: var(--c-gray-600); text-decoration: none;
   cursor: pointer; background: none; border: none; text-align: left; width: 100%;
 }
-.pending-row:hover { background: #fff; color: #1a1a1a; }
-.pending-row.active { background: #fff; color: #1a1a1a; }
+.pending-row:hover { background: var(--c-white); color: var(--c-ink); }
+.pending-row.active { background: var(--c-white); color: var(--c-ink); }
 .pending-row .pending-by {
-  font-size: 11px; color: #999; margin-top: 1px;
+  font-size: var(--text-xs); color: var(--c-gray-500); margin-top: 1px;
 }
 
 .catalog-footer {
-  border-top: 1px solid #e5e5e5;
+  border-top: 1px solid var(--c-gray-200);
   padding: 10px 14px;
   flex-shrink: 0;
-  background: #fff;
+  background: var(--c-white);
 }
 .btn-propose {
   width: 100%;
-  background: #1a1a1a; color: #fff;
-  border: none; border-radius: 6px;
+  background: var(--c-ink); color: var(--c-white);
+  border: none; border-radius: var(--radius-md);
   padding: 8px 12px;
-  font-size: 13px; font-weight: 600;
+  font-size: var(--text-base); font-weight: 600;
   cursor: pointer;
 }
-.btn-propose:hover { background: #333; }
+.btn-propose:hover { background: var(--c-gray-700); }
 .btn-propose:disabled { opacity: 0.5; cursor: default; }
 
 /* --- Main pane --- */
@@ -190,74 +190,74 @@
 }
 
 .welcome { max-width: 640px; }
-.welcome h1 { font-size: 22px; font-weight: 600; margin: 0 0 16px; }
-.welcome p { line-height: 1.7; color: #444; }
+.welcome h1 { font-size: var(--text-2xl); font-weight: 600; margin: 0 0 16px; }
+.welcome p { line-height: 1.7; color: var(--c-gray-600); }
 
 /* --- RFC / Proposal view (read-only for slice 1) --- */
 
 .entry-view { max-width: 720px; margin: 0 auto; }
 .entry-state-banner {
-  font-size: 12px; font-weight: 600;
+  font-size: var(--text-sm); font-weight: 600;
   text-transform: uppercase; letter-spacing: 0.06em;
-  color: #b45309;
+  color: var(--c-warning-accent);
   padding: 6px 10px;
-  background: #fffbeb; border: 1px solid #fde68a;
-  border-radius: 6px;
+  background: var(--c-warning-bg-soft); border: 1px solid #fde68a;
+  border-radius: var(--radius-md);
   display: inline-block; margin-bottom: 16px;
 }
-.entry-state-banner.active { color: #166534; background: #f0fdf4; border-color: #bbf7d0; }
-.entry-state-banner.declined { color: #991b1b; background: #fef2f2; border-color: #fecaca; }
+.entry-state-banner.active { color: var(--c-success-fg); background: #f0fdf4; border-color: #bbf7d0; }
+.entry-state-banner.declined { color: var(--c-danger-fg); background: var(--c-danger-bg); border-color: var(--c-danger-border); }
 .entry-state-banner.merged { color: #1e40af; background: #eff6ff; border-color: #bfdbfe; }
 
-.entry-title { font-size: 26px; font-weight: 700; margin: 0 0 8px; }
-.entry-meta { font-size: 12px; color: #999; margin-bottom: 24px; }
+.entry-title { font-size: var(--text-3xl); font-weight: 700; margin: 0 0 8px; }
+.entry-meta { font-size: var(--text-sm); color: var(--c-gray-500); margin-bottom: 24px; }
 .entry-meta .entry-tag {
   display: inline-block;
-  background: #f0f0ee; color: #555;
-  padding: 1px 8px; border-radius: 999px;
+  background: var(--c-gray-150); color: var(--c-gray-500);
+  padding: 1px 8px; border-radius: var(--radius-pill);
   margin-right: 4px;
 }
 .entry-body {
-  font-size: 15px; line-height: 1.75; color: #1a1a1a;
+  font-size: var(--text-lg); line-height: 1.75; color: var(--c-ink);
 }
 .entry-body h1, .entry-body h2, .entry-body h3 { font-weight: 600; }
-.entry-body h1 { font-size: 22px; margin-top: 24px; }
-.entry-body h2 { font-size: 17px; margin-top: 20px; }
-.entry-body h3 { font-size: 15px; margin-top: 16px; }
+.entry-body h1 { font-size: var(--text-2xl); margin-top: 24px; }
+.entry-body h2 { font-size: var(--text-xl); margin-top: 20px; }
+.entry-body h3 { font-size: var(--text-lg); margin-top: 16px; }
 .entry-body p { margin: 0 0 12px; }
 .entry-body ul, .entry-body ol { padding-left: 24px; }
-.entry-body code { background: #f0f0ee; padding: 1px 5px; border-radius: 3px; font-size: 13px; }
+.entry-body code { background: var(--c-gray-150); padding: 1px 5px; border-radius: var(--radius-sm); font-size: var(--text-base); }
 
 .entry-actions {
   display: flex; gap: 8px; margin: 16px 0 24px;
   padding-bottom: 24px;
-  border-bottom: 1px solid #e5e5e5;
+  border-bottom: 1px solid var(--c-gray-200);
 }
 .btn-primary {
-  background: #166534; color: #fff;
-  border: none; border-radius: 6px;
+  background: var(--c-success-fg); color: var(--c-white);
+  border: none; border-radius: var(--radius-md);
   padding: 7px 14px;
-  font-size: 13px; font-weight: 600;
+  font-size: var(--text-base); font-weight: 600;
   cursor: pointer;
 }
 .btn-primary:hover { background: #14532d; }
 .btn-primary:disabled { opacity: 0.5; cursor: default; }
 .btn-secondary {
-  background: #fff; color: #1a1a1a;
-  border: 1px solid #d4d4d4; border-radius: 6px;
+  background: var(--c-white); color: var(--c-ink);
+  border: 1px solid var(--c-gray-300); border-radius: var(--radius-md);
   padding: 7px 14px;
-  font-size: 13px; font-weight: 600;
+  font-size: var(--text-base); font-weight: 600;
   cursor: pointer;
 }
-.btn-secondary:hover { background: #f7f7f5; }
+.btn-secondary:hover { background: var(--c-gray-100); }
 .btn-danger {
-  background: #fff; color: #991b1b;
-  border: 1px solid #fecaca; border-radius: 6px;
+  background: var(--c-white); color: var(--c-danger-fg);
+  border: 1px solid var(--c-danger-border); border-radius: var(--radius-md);
   padding: 7px 14px;
-  font-size: 13px; font-weight: 600;
+  font-size: var(--text-base); font-weight: 600;
   cursor: pointer;
 }
-.btn-danger:hover { background: #fef2f2; }
+.btn-danger:hover { background: var(--c-danger-bg); }
 
 /* --- Modals --- */
 
@@ -268,8 +268,8 @@
   z-index: 100;
 }
 .modal {
-  background: #fff;
-  border-radius: 10px;
+  background: var(--c-white);
+  border-radius: var(--radius-xl);
   box-shadow: 0 12px 40px rgba(0,0,0,0.15);
   width: 560px; max-width: calc(100vw - 40px);
   max-height: calc(100vh - 80px);
@@ -277,13 +277,13 @@
 }
 .modal-header {
   padding: 18px 20px;
-  border-bottom: 1px solid #f0f0ee;
+  border-bottom: 1px solid var(--c-gray-150);
   display: flex; align-items: center; justify-content: space-between;
 }
-.modal-header h2 { margin: 0; font-size: 17px; font-weight: 600; }
+.modal-header h2 { margin: 0; font-size: var(--text-xl); font-weight: 600; }
 .modal-close {
-  background: none; border: none; font-size: 22px; cursor: pointer;
-  color: #999; line-height: 1; padding: 0;
+  background: none; border: none; font-size: var(--text-2xl); cursor: pointer;
+  color: var(--c-gray-500); line-height: 1; padding: 0;
 }
 .modal-body {
   padding: 20px;
@@ -292,30 +292,30 @@
 }
 .modal-body label {
   display: block;
-  font-size: 12px; font-weight: 600;
-  color: #555;
+  font-size: var(--text-sm); font-weight: 600;
+  color: var(--c-gray-500);
   text-transform: uppercase; letter-spacing: 0.05em;
   margin-bottom: 4px;
 }
 .modal-body input, .modal-body textarea {
   width: 100%;
-  border: 1px solid #d4d4d4; border-radius: 6px;
+  border: 1px solid var(--c-gray-300); border-radius: var(--radius-md);
   padding: 8px 10px;
-  font-size: 14px; font-family: inherit;
+  font-size: var(--text-md); font-family: inherit;
   outline: none; margin-bottom: 14px;
 }
-.modal-body input:focus, .modal-body textarea:focus { border-color: #1a1a1a; }
+.modal-body input:focus, .modal-body textarea:focus { border-color: var(--c-ink); }
 .modal-body textarea { resize: vertical; min-height: 100px; }
 .field-help {
-  font-size: 12px; color: #999;
+  font-size: var(--text-sm); color: var(--c-gray-500);
   margin-top: -10px; margin-bottom: 14px;
 }
 .field-error {
-  font-size: 12px; color: #991b1b;
+  font-size: var(--text-sm); color: var(--c-danger-fg);
   margin-top: -10px; margin-bottom: 14px;
 }
 .modal-actions {
-  border-top: 1px solid #f0f0ee;
+  border-top: 1px solid var(--c-gray-150);
   padding: 14px 20px;
   display: flex; justify-content: flex-end; gap: 10px;
 }
@@ -329,28 +329,28 @@
   padding: 40px;
   text-align: center;
 }
-.landing h1 { font-size: 28px; font-weight: 700; margin: 0 0 8px; }
-.landing .subtitle { font-size: 16px; color: #666; margin: 0 0 28px; }
+.landing h1 { font-size: var(--text-3xl); font-weight: 700; margin: 0 0 8px; }
+.landing .subtitle { font-size: var(--text-lg); color: var(--c-gray-500); margin: 0 0 28px; }
 .landing .pitch {
   max-width: 540px;
-  line-height: 1.7; color: #333;
-  font-size: 15px;
+  line-height: 1.7; color: var(--c-gray-700);
+  font-size: var(--text-lg);
   margin: 0 0 28px;
 }
 .landing .btn-signin {
-  background: #1a1a1a; color: #fff;
-  border: none; border-radius: 8px;
+  background: var(--c-ink); color: var(--c-white);
+  border: none; border-radius: var(--radius-lg);
   padding: 10px 20px;
-  font-size: 14px; font-weight: 600;
+  font-size: var(--text-md); font-weight: 600;
   text-decoration: none;
 }
-.landing .btn-signin:hover { background: #333; }
+.landing .btn-signin:hover { background: var(--c-gray-700); }
 .landing .secondary-link {
   margin-top: 14px;
-  font-size: 13px;
-  color: #666; text-decoration: none;
+  font-size: var(--text-base);
+  color: var(--c-gray-500); text-decoration: none;
 }
-.landing .secondary-link:hover { color: #1a1a1a; text-decoration: underline; }
+.landing .secondary-link:hover { color: var(--c-ink); text-decoration: underline; }
 
 /* --- v0.7.0: email + one-time-code sign-in (§6.2) --- */
 
@@ -366,36 +366,36 @@
   gap: 14px;
 }
 .otc-login h1 {
-  font-size: 22px;
+  font-size: var(--text-2xl);
   font-weight: 600;
   margin: 0 0 4px;
 }
 .otc-login .otc-hint {
-  color: #555;
-  font-size: 14px;
+  color: var(--c-gray-500);
+  font-size: var(--text-md);
   line-height: 1.5;
   margin: 0;
 }
 .otc-login input {
   width: 100%;
   padding: 10px 12px;
-  font-size: 15px;
-  border: 1px solid #ddd;
-  border-radius: 6px;
+  font-size: var(--text-lg);
+  border: 1px solid var(--c-gray-300);
+  border-radius: var(--radius-md);
   box-sizing: border-box;
 }
 .otc-login input:focus {
   outline: none;
-  border-color: #1a1a1a;
+  border-color: var(--c-ink);
 }
 .otc-login button[type="submit"] {
-  background: #1a1a1a; color: #fff;
-  border: none; border-radius: 6px;
+  background: var(--c-ink); color: var(--c-white);
+  border: none; border-radius: var(--radius-md);
   padding: 10px 18px;
-  font-size: 14px; font-weight: 600;
+  font-size: var(--text-md); font-weight: 600;
   cursor: pointer;
 }
-.otc-login button[type="submit"]:hover:not(:disabled) { background: #333; }
+.otc-login button[type="submit"]:hover:not(:disabled) { background: var(--c-gray-700); }
 .otc-login button[type="submit"]:disabled { opacity: 0.5; cursor: not-allowed; }
 .otc-login form {
   display: flex; flex-direction: column;
@@ -406,61 +406,61 @@
 }
 .otc-login .btn-link-quiet {
   background: none; border: none;
-  color: #666; font-size: 13px;
+  color: var(--c-gray-500); font-size: var(--text-base);
   cursor: pointer; padding: 0;
 }
-.otc-login .btn-link-quiet:hover { color: #1a1a1a; text-decoration: underline; }
+.otc-login .btn-link-quiet:hover { color: var(--c-ink); text-decoration: underline; }
 /* v0.8.0 — labels + textarea for the first-OTC profile capture step. */
 .otc-field-label {
-  font-size: 12px; color: #666;
+  font-size: var(--text-sm); color: var(--c-gray-500);
   margin: 8px 0 -4px;
   font-weight: 600;
 }
 .otc-login textarea {
   width: 100%;
   padding: 10px 12px;
-  font-size: 15px;
-  border: 1px solid #ddd;
-  border-radius: 6px;
+  font-size: var(--text-lg);
+  border: 1px solid var(--c-gray-300);
+  border-radius: var(--radius-md);
   box-sizing: border-box;
   font-family: inherit;
   resize: vertical;
 }
 .otc-login textarea:focus {
   outline: none;
-  border-color: #1a1a1a;
+  border-color: var(--c-ink);
 }
 .otc-shortcut-hint {
-  color: #888; font-size: 12px; margin: 4px 0 0;
+  color: var(--c-gray-500); font-size: var(--text-sm); margin: 4px 0 0;
 }
 .otc-shortcut-hint kbd {
-  background: #f0f0ee; border: 1px solid #ddd; border-radius: 3px;
-  padding: 1px 5px; font-size: 11px; font-family: inherit;
+  background: var(--c-gray-150); border: 1px solid var(--c-gray-300); border-radius: var(--radius-sm);
+  padding: 1px 5px; font-size: var(--text-xs); font-family: inherit;
 }
 .otc-status {
-  color: #555; font-size: 13px;
-  background: #f7f6f0;
+  color: var(--c-gray-500); font-size: var(--text-base);
+  background: var(--c-gray-100);
   border-left: 3px solid #cfc8a8;
   padding: 8px 12px;
   margin: 4px 0 0;
 }
 .otc-fallback {
-  font-size: 12px; color: #777;
+  font-size: var(--text-sm); color: var(--c-gray-500);
   margin: 16px 0 0;
   display: flex; gap: 8px; align-items: center; flex-wrap: wrap;
 }
 .otc-fallback a, .otc-fallback .otc-fallback-link {
-  color: #666; text-decoration: none;
+  color: var(--c-gray-500); text-decoration: none;
 }
-.otc-fallback a:hover { color: #1a1a1a; text-decoration: underline; }
-.otc-fallback-sep { color: #ccc; }
+.otc-fallback a:hover { color: var(--c-ink); text-decoration: underline; }
+.otc-fallback-sep { color: var(--c-gray-300); }
 
 /* v0.11.0 — "trust this device for 30 days" checkbox on the verify
    step. Sits above the action row, padded so it doesn't crowd the
    passcode/code input. */
 .otc-trust-device {
   display: flex; align-items: center; gap: 8px;
-  font-size: 13px; color: #444;
+  font-size: var(--text-base); color: var(--c-gray-600);
   margin: 8px 0 4px;
   cursor: pointer;
   user-select: none;
@@ -476,41 +476,41 @@
 .device-list-item {
   display: flex; align-items: center; justify-content: space-between;
   gap: 12px;
-  border: 1px solid #eee; border-radius: 6px;
+  border: 1px solid var(--c-gray-200); border-radius: var(--radius-md);
   padding: 10px 12px; margin: 0 0 8px;
-  background: #fafafa;
+  background: var(--c-gray-50);
 }
 .device-list-item .device-meta {
   flex: 1; min-width: 0;
 }
 .device-list-item .device-ua {
-  font-size: 13px; color: #1a1a1a;
+  font-size: var(--text-base); color: var(--c-ink);
   white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
 }
 .device-list-item .device-stamps {
-  font-size: 12px; color: #777;
+  font-size: var(--text-sm); color: var(--c-gray-500);
   margin-top: 2px;
 }
 .device-list-item button {
-  font-size: 12px; padding: 4px 10px;
-  border: 1px solid #ccc; border-radius: 4px;
+  font-size: var(--text-sm); padding: 4px 10px;
+  border: 1px solid var(--c-gray-300); border-radius: var(--radius-sm);
   background: white; cursor: pointer;
 }
 .device-list-item button:hover:not(:disabled) {
-  background: #f5f5f5;
+  background: var(--c-gray-100);
 }
 .device-revoke-all {
   margin-top: 8px;
-  font-size: 13px; padding: 6px 12px;
-  border: 1px solid #cb6a6a; border-radius: 4px;
+  font-size: var(--text-base); padding: 6px 12px;
+  border: 1px solid #cb6a6a; border-radius: var(--radius-sm);
   background: white; color: #cb6a6a; cursor: pointer;
 }
 .device-revoke-all:hover:not(:disabled) {
-  background: #fff5f5;
+  background: var(--c-danger-bg);
 }
 .device-empty {
-  font-size: 13px; color: #777;
-  background: #fafafa; border: 1px solid #eee; border-radius: 6px;
+  font-size: var(--text-base); color: var(--c-gray-500);
+  background: var(--c-gray-50); border: 1px solid var(--c-gray-200); border-radius: var(--radius-md);
   padding: 12px;
 }
 
@@ -525,35 +525,35 @@
   max-width: 560px;
   text-align: center;
 }
-.beta-pending h1 { font-size: 24px; margin: 0 0 16px; }
-.beta-pending p { font-size: 15px; line-height: 1.6; color: #333; margin: 0 0 14px; }
+.beta-pending h1 { font-size: var(--text-2xl); margin: 0 0 16px; }
+.beta-pending p { font-size: var(--text-lg); line-height: 1.6; color: var(--c-gray-700); margin: 0 0 14px; }
 .beta-pending-contact {
-  background: #fafafa; border: 1px solid #eee; border-radius: 8px;
+  background: var(--c-gray-50); border: 1px solid var(--c-gray-200); border-radius: var(--radius-lg);
   padding: 14px 18px;
-  color: #444;
+  color: var(--c-gray-600);
 }
 .beta-pending-actions {
   margin-top: 24px;
   display: flex; gap: 18px; justify-content: center; align-items: center;
 }
 .beta-pending-actions .btn-primary {
-  background: #1a1a1a; color: #fff;
-  border-radius: 8px; padding: 9px 18px;
-  font-size: 14px; font-weight: 600; text-decoration: none;
+  background: var(--c-ink); color: var(--c-white);
+  border-radius: var(--radius-lg); padding: 9px 18px;
+  font-size: var(--text-md); font-weight: 600; text-decoration: none;
 }
-.beta-pending-actions .btn-primary:hover { background: #333; }
-.btn-link-quiet { color: #666; text-decoration: none; font-size: 13px; }
-.btn-link-quiet:hover { color: #1a1a1a; text-decoration: underline; }
+.beta-pending-actions .btn-primary:hover { background: var(--c-gray-700); }
+.btn-link-quiet { color: var(--c-gray-500); text-decoration: none; font-size: var(--text-base); }
+.btn-link-quiet:hover { color: var(--c-ink); text-decoration: underline; }
 
 /* v0.8.0 — thin "your beta access is in review" banner. Shown on every
    page (other than /beta-pending itself, which carries the larger
    form of the message). Sits just under the app header so it doesn't
    compete with the catalog rail. */
 .pending-access-banner {
-  background: #fff8e0;
+  background: var(--c-warning-bg-soft);
   border-bottom: 1px solid #e6dca0;
   color: #4a3f00;
-  font-size: 13px;
+  font-size: var(--text-base);
   padding: 8px 16px;
   text-align: center;
 }
@@ -580,45 +580,45 @@
 .rfc-breadcrumb {
   display: flex; align-items: center; gap: 8px;
   padding: 10px 16px;
-  border-bottom: 1px solid #e5e5e5;
-  background: #fafafa;
-  font-size: 13px; color: #555;
+  border-bottom: 1px solid var(--c-gray-200);
+  background: var(--c-gray-50);
+  font-size: var(--text-base); color: var(--c-gray-500);
   flex-shrink: 0;
 }
 .breadcrumb-label {
-  font-size: 11px; font-weight: 700; text-transform: uppercase;
-  letter-spacing: 0.05em; color: #888;
+  font-size: var(--text-xs); font-weight: 700; text-transform: uppercase;
+  letter-spacing: 0.05em; color: var(--c-gray-500);
 }
-.breadcrumb-sep { color: #ccc; }
-.breadcrumb-meta { color: #999; font-size: 12px; }
+.breadcrumb-sep { color: var(--c-gray-300); }
+.breadcrumb-meta { color: var(--c-gray-500); font-size: var(--text-sm); }
 .breadcrumb-actions { margin-left: auto; display: flex; gap: 8px; align-items: center; }
 
 .btn-mode-toggle {
-  font-size: 12px; font-weight: 600;
-  padding: 4px 12px; border-radius: 999px;
-  border: 1px solid #d4d4d4; background: #fff; color: #444;
+  font-size: var(--text-sm); font-weight: 600;
+  padding: 4px 12px; border-radius: var(--radius-pill);
+  border: 1px solid var(--c-gray-300); background: var(--c-white); color: var(--c-gray-600);
   cursor: pointer;
 }
-.btn-mode-toggle.discuss { background: #fff; color: #444; }
-.btn-mode-toggle.contribute { background: #1a1a1a; color: #fff; border-color: #1a1a1a; }
+.btn-mode-toggle.discuss { background: var(--c-white); color: var(--c-gray-600); }
+.btn-mode-toggle.contribute { background: var(--c-ink); color: var(--c-white); border-color: var(--c-ink); }
 
 .btn-start-contribution-header {
-  background: #1a1a1a; color: #fff;
-  border: none; border-radius: 6px;
-  padding: 5px 12px; font-size: 12px; font-weight: 600;
+  background: var(--c-ink); color: var(--c-white);
+  border: none; border-radius: var(--radius-md);
+  padding: 5px 12px; font-size: var(--text-sm); font-weight: 600;
   cursor: pointer;
 }
 
 .branch-dropdown { position: relative; }
 .branch-dropdown-trigger {
-  background: none; border: 1px solid transparent; border-radius: 5px;
-  padding: 3px 8px; font-weight: 600; color: #1a1a1a; font-size: 13px;
+  background: none; border: 1px solid transparent; border-radius: var(--radius-md);
+  padding: 3px 8px; font-weight: 600; color: var(--c-ink); font-size: var(--text-base);
   cursor: pointer;
 }
-.branch-dropdown-trigger:hover { border-color: #e5e5e5; }
+.branch-dropdown-trigger:hover { border-color: var(--c-gray-200); }
 .branch-dropdown-menu {
   position: absolute; top: 100%; left: 0; margin-top: 4px;
-  background: #fff; border: 1px solid #e5e5e5; border-radius: 8px;
+  background: var(--c-white); border: 1px solid var(--c-gray-200); border-radius: var(--radius-lg);
   box-shadow: 0 4px 20px rgba(0,0,0,0.08);
   z-index: 50; min-width: 240px; padding: 4px;
 }
@@ -626,13 +626,13 @@
   display: flex; align-items: center; gap: 8px;
   width: 100%; padding: 6px 10px;
   background: none; border: none; cursor: pointer; text-align: left;
-  font-size: 13px; border-radius: 5px;
+  font-size: var(--text-base); border-radius: var(--radius-md);
 }
-.branch-dropdown-item:hover { background: #f5f5f5; }
-.branch-dropdown-item.active { background: #f0f0ee; font-weight: 600; }
+.branch-dropdown-item:hover { background: var(--c-gray-100); }
+.branch-dropdown-item.active { background: var(--c-gray-150); font-weight: 600; }
 .branch-name { flex: 1; }
-.branch-creator { font-size: 11px; color: #999; }
-.branch-private-icon { font-size: 10px; }
+.branch-creator { font-size: var(--text-xs); color: var(--c-gray-500); }
+.branch-private-icon { font-size: var(--text-2xs); }
 
 .rfc-body { flex: 1; display: flex; overflow: hidden; }
 
@@ -642,30 +642,30 @@
   flex: 1; min-width: 0;
   display: flex; flex-direction: column;
   overflow: hidden; position: relative;
-  background: #fff;
+  background: var(--c-white);
 }
 
 .discuss-mode-banner {
   padding: 8px 16px;
-  background: #fffbeb; border-bottom: 1px solid #fde68a;
-  color: #92400e; font-size: 12px;
+  background: var(--c-warning-bg-soft); border-bottom: 1px solid #fde68a;
+  color: var(--c-warning-fg); font-size: var(--text-sm);
 }
-.discuss-mode-banner.muted { background: #f0f0ee; color: #666; border-color: #e5e5e5; }
+.discuss-mode-banner.muted { background: var(--c-gray-150); color: var(--c-gray-500); border-color: var(--c-gray-200); }
 
 .editor-toolbar {
   display: flex; align-items: center; gap: 12px;
   padding: 8px 16px;
-  border-bottom: 1px solid #f0f0ee;
-  background: #fafafa;
-  font-size: 12px; color: #777;
+  border-bottom: 1px solid var(--c-gray-150);
+  background: var(--c-gray-50);
+  font-size: var(--text-sm); color: var(--c-gray-500);
 }
 .btn-review-toggle {
-  background: #fff; color: #1a1a1a;
-  border: 1px solid #d4d4d4; border-radius: 5px;
-  padding: 4px 10px; font-size: 12px; font-weight: 600; cursor: pointer;
+  background: var(--c-white); color: var(--c-ink);
+  border: 1px solid var(--c-gray-300); border-radius: var(--radius-md);
+  padding: 4px 10px; font-size: var(--text-sm); font-weight: 600; cursor: pointer;
 }
-.btn-review-toggle.active { background: #1a1a1a; color: #fff; border-color: #1a1a1a; }
-.editor-toolbar-hint { color: #999; font-size: 11px; }
+.btn-review-toggle.active { background: var(--c-ink); color: var(--c-white); border-color: var(--c-ink); }
+.editor-toolbar-hint { color: var(--c-gray-500); font-size: var(--text-xs); }
 
 .editor-wrapper {
   flex: 1; overflow-y: auto;
@@ -692,13 +692,13 @@
   display: flex; flex-direction: column;
   overflow: hidden;
 }
-.editor-split-raw { border-right: 1px solid #e5e5e5; }
-.editor-split-preview { background: #fff; overflow-y: auto; }
+.editor-split-raw { border-right: 1px solid var(--c-gray-200); }
+.editor-split-preview { background: var(--c-white); overflow-y: auto; }
 .editor-split-preview .markdown-preview { padding: 24px 32px; }
 
 /* ── Markdown preview (Phase 2 render pane) ──────────────────────────── */
 .markdown-preview {
-  font-size: 15px; line-height: 1.75; color: #1a1a1a;
+  font-size: var(--text-lg); line-height: 1.75; color: var(--c-ink);
   max-width: 720px; margin: 0 auto;
   outline: none;
 }
@@ -706,28 +706,28 @@
   flex: 1; overflow-y: auto;
   padding: 32px 48px;
 }
-.markdown-preview h1 { font-size: 22px; font-weight: 700; margin: 24px 0 12px; }
-.markdown-preview h2 { font-size: 17px; font-weight: 600; margin: 20px 0 8px; }
-.markdown-preview h3 { font-size: 15px; font-weight: 600; margin: 16px 0 6px; }
+.markdown-preview h1 { font-size: var(--text-2xl); font-weight: 700; margin: 24px 0 12px; }
+.markdown-preview h2 { font-size: var(--text-xl); font-weight: 600; margin: 20px 0 8px; }
+.markdown-preview h3 { font-size: var(--text-lg); font-weight: 600; margin: 16px 0 6px; }
 .markdown-preview p { margin: 0 0 12px; }
 .markdown-preview ul, .markdown-preview ol { padding-left: 24px; }
 .markdown-preview code {
-  background: #f0f0ee; padding: 1px 5px; border-radius: 3px; font-size: 13px;
+  background: var(--c-gray-150); padding: 1px 5px; border-radius: var(--radius-sm); font-size: var(--text-base);
 }
 .markdown-preview pre {
-  background: #f6f6f4; padding: 12px 16px; border-radius: 6px;
-  overflow-x: auto; font-size: 13px; line-height: 1.5;
+  background: var(--c-gray-100); padding: 12px 16px; border-radius: var(--radius-md);
+  overflow-x: auto; font-size: var(--text-base); line-height: 1.5;
 }
 .markdown-preview pre code { background: none; padding: 0; }
 .markdown-preview blockquote {
   margin: 0 0 12px; padding: 4px 14px;
-  border-left: 3px solid #d4d4d4; color: #555;
+  border-left: 3px solid var(--c-gray-300); color: var(--c-gray-500);
 }
 .markdown-preview table { border-collapse: collapse; margin: 0 0 12px; }
 .markdown-preview th, .markdown-preview td {
-  border: 1px solid #e5e5e5; padding: 6px 10px;
+  border: 1px solid var(--c-gray-200); padding: 6px 10px;
 }
-.markdown-preview th { background: #fafafa; font-weight: 600; }
+.markdown-preview th { background: var(--c-gray-50); font-weight: 600; }
 
 /* Mermaid placeholder shown until the lazy-loaded module resolves.
    The .mermaid-block container is preserved so future authoring tools
@@ -738,15 +738,15 @@
 }
 .markdown-preview .mermaid-block svg { max-width: 100%; height: auto; }
 .markdown-preview .mermaid-placeholder {
-  background: #f6f6f4; color: #777;
-  padding: 12px 16px; border-radius: 6px;
-  font-size: 12px; line-height: 1.5;
+  background: var(--c-gray-100); color: var(--c-gray-500);
+  padding: 12px 16px; border-radius: var(--radius-md);
+  font-size: var(--text-sm); line-height: 1.5;
   text-align: left; white-space: pre-wrap;
 }
 .markdown-preview .mermaid-error {
-  background: #fee2e2; color: #991b1b;
-  padding: 10px 14px; border-radius: 6px;
-  font-size: 12px; line-height: 1.5;
+  background: var(--c-danger-bg); color: var(--c-danger-fg);
+  padding: 10px 14px; border-radius: var(--radius-md);
+  font-size: var(--text-sm); line-height: 1.5;
   text-align: left; white-space: pre-wrap;
 }
 
@@ -764,29 +764,29 @@
    toolbar toggle. Hovering surfaces a ChangeTooltip with the source
    message and reason. */
 .markdown-preview .tracked-delete {
-  background: #fee2e2; color: #991b1b; text-decoration: line-through;
-  border-radius: 2px; padding: 1px 2px; cursor: pointer;
+  background: var(--c-danger-bg); color: var(--c-danger-fg); text-decoration: line-through;
+  border-radius: var(--radius-xs); padding: 1px 2px; cursor: pointer;
   margin-right: 2px;
 }
 .markdown-preview .tracked-insert {
-  background: #dcfce7; color: #166534;
-  border-radius: 2px; padding: 1px 2px; cursor: pointer;
+  background: var(--c-success-bg); color: var(--c-success-fg);
+  border-radius: var(--radius-xs); padding: 1px 2px; cursor: pointer;
 }
 
 .cm-source-editor .cm-editor {
   flex: 1; min-height: 0;
   font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
-  font-size: 13px; line-height: 1.6;
-  background: #fff;
+  font-size: var(--text-base); line-height: 1.6;
+  background: var(--c-white);
 }
 .cm-source-editor .cm-editor.cm-focused { outline: none; }
 .cm-source-editor .cm-scroller { padding: 24px 0; }
 .cm-source-editor .cm-content { padding: 0 32px; max-width: 880px; }
 .cm-source-editor .cm-gutters {
-  background: #fafafa; border-right: 1px solid #f0f0ee; color: #b0b0b0;
+  background: var(--c-gray-50); border-right: 1px solid var(--c-gray-150); color: var(--c-gray-400);
 }
-.cm-source-editor .cm-activeLineGutter { background: #f3f4f6; color: #555; }
-.cm-source-editor .cm-activeLine { background: #fafbfc; }
+.cm-source-editor .cm-activeLineGutter { background: var(--c-gray-100); color: var(--c-gray-500); }
+.cm-source-editor .cm-activeLine { background: var(--c-gray-50); }
 
 /* §8.10 paragraph-margin marker (Phase 4) — gutter accent on lines
    that differ from the open-session baseline (last server-confirmed
@@ -806,55 +806,55 @@
 }
 
 .readonly-bar {
-  border-top: 1px solid #e5e5e5;
+  border-top: 1px solid var(--c-gray-200);
   padding: 10px 16px; text-align: center;
-  font-size: 13px; color: #888; background: #fafafa;
+  font-size: var(--text-base); color: var(--c-gray-500); background: var(--c-gray-50);
 }
-.readonly-bar a { color: #1a1a1a; font-weight: 600; }
+.readonly-bar a { color: var(--c-ink); font-weight: 600; }
 
 /* ── Prompt bar ──────────────────────────────────────────────────────── */
 
 .prompt-bar {
-  border-top: 1px solid #e5e5e5;
-  background: #fff;
+  border-top: 1px solid var(--c-gray-200);
+  background: var(--c-white);
   padding: 12px 48px;
   flex-shrink: 0;
 }
 .selection-badge {
-  font-size: 12px; color: #5b5bd6;
+  font-size: var(--text-sm); color: var(--c-accent);
   margin-bottom: 8px; display: flex; align-items: center; gap: 6px;
 }
-.selection-icon { font-size: 10px; }
+.selection-icon { font-size: var(--text-2xs); }
 .prompt-row {
   display: flex; gap: 10px; align-items: flex-end;
   max-width: 720px; margin: 0 auto;
 }
 .prompt-input {
-  flex: 1; border: 1px solid #e5e5e5; border-radius: 8px;
-  padding: 9px 13px; font-size: 14px; font-family: inherit;
+  flex: 1; border: 1px solid var(--c-gray-200); border-radius: var(--radius-lg);
+  padding: 9px 13px; font-size: var(--text-md); font-family: inherit;
   resize: none; line-height: 1.5; outline: none;
   min-height: 40px; max-height: 120px;
 }
-.prompt-input:focus { border-color: #1a1a1a; }
+.prompt-input:focus { border-color: var(--c-ink); }
 .prompt-submit {
-  background: #1a1a1a; color: #fff; border: none;
-  border-radius: 8px; padding: 9px 16px;
-  font-size: 13px; font-weight: 600; cursor: pointer;
+  background: var(--c-ink); color: var(--c-white); border: none;
+  border-radius: var(--radius-lg); padding: 9px 16px;
+  font-size: var(--text-base); font-weight: 600; cursor: pointer;
   height: 40px;
 }
-.prompt-submit:disabled { background: #ccc; cursor: default; }
+.prompt-submit:disabled { background: var(--c-gray-300); cursor: default; }
 
 /* ── Model picker ──────────────────────────────────────────────────── */
 
 .model-picker { display: flex; gap: 4px; padding: 0 4px; flex-shrink: 0; }
 .model-pill {
   display: flex; align-items: center; gap: 5px;
-  padding: 4px 10px; border-radius: 20px;
-  font-size: 12px; font-weight: 600;
-  border: 1px solid #e5e5e5; background: none; color: #666;
+  padding: 4px 10px; border-radius: var(--radius-pill);
+  font-size: var(--text-sm); font-weight: 600;
+  border: 1px solid var(--c-gray-200); background: none; color: var(--c-gray-500);
   cursor: pointer;
 }
-.model-pill:hover { border-color: #aaa; color: #333; }
+.model-pill:hover { border-color: var(--c-gray-400); color: var(--c-gray-700); }
 .model-pill.active { font-weight: 700; }
 .model-dot { width: 7px; height: 7px; border-radius: 50%; }
 
@@ -862,37 +862,37 @@
 
 .selection-tooltip {
   position: fixed; z-index: 100;
-  background: #fff; border: 1px solid #e5e5e5;
-  border-radius: 10px;
+  background: var(--c-white); border: 1px solid var(--c-gray-200);
+  border-radius: var(--radius-xl);
   box-shadow: 0 4px 20px rgba(0,0,0,0.12);
   padding: 8px 10px;
   width: max-content; min-width: 320px; max-width: 480px;
   display: flex; flex-direction: column; gap: 6px;
 }
 .selection-tooltip-quote {
-  font-size: 11px; color: #888; font-style: italic;
+  font-size: var(--text-xs); color: var(--c-gray-500); font-style: italic;
   white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
 }
 .selection-tooltip-tabs { display: flex; gap: 4px; }
 .selection-tooltip-tab {
   background: none; border: 1px solid transparent;
-  font-size: 12px; padding: 3px 10px; border-radius: 6px;
-  cursor: pointer; color: #666;
+  font-size: var(--text-sm); padding: 3px 10px; border-radius: var(--radius-md);
+  cursor: pointer; color: var(--c-gray-500);
 }
-.selection-tooltip-tab.active { background: #1a1a1a; color: #fff; }
+.selection-tooltip-tab.active { background: var(--c-ink); color: var(--c-white); }
 .selection-tooltip-input-row { display: flex; gap: 6px; align-items: center; }
 .selection-tooltip-input {
-  flex: 1; border: 1px solid #e5e5e5; border-radius: 6px;
-  padding: 6px 10px; font-size: 13px; font-family: inherit; outline: none;
-  background: #f9f9f9;
+  flex: 1; border: 1px solid var(--c-gray-200); border-radius: var(--radius-md);
+  padding: 6px 10px; font-size: var(--text-base); font-family: inherit; outline: none;
+  background: var(--c-gray-50);
 }
-.selection-tooltip-input:focus { border-color: #1a1a1a; background: #fff; }
+.selection-tooltip-input:focus { border-color: var(--c-ink); background: var(--c-white); }
 .selection-tooltip-btn {
-  background: #1a1a1a; color: #fff;
-  border: none; border-radius: 6px;
-  padding: 6px 12px; font-size: 13px; font-weight: 600; cursor: pointer;
+  background: var(--c-ink); color: var(--c-white);
+  border: none; border-radius: var(--radius-md);
+  padding: 6px 12px; font-size: var(--text-base); font-weight: 600; cursor: pointer;
 }
-.selection-tooltip-btn:disabled { background: #ccc; cursor: default; }
+.selection-tooltip-btn:disabled { background: var(--c-gray-300); cursor: default; }
 
 /* ── Right panel (chat + change panel) ───────────────────────────────── */
 
@@ -903,11 +903,11 @@
    below restores the inline three-column layout. */
 .right-panel {
   position: fixed;
-  top: 48px; right: 0; bottom: 0;
+  top: var(--header-height); right: 0; bottom: 0;
   width: min(420px, 92vw);
-  border-left: 1px solid #e5e5e5;
+  border-left: 1px solid var(--c-gray-200);
   display: flex; flex-direction: column;
-  overflow: hidden; background: #fff;
+  overflow: hidden; background: var(--c-white);
   transform: translateX(100%);
   transition: transform 150ms ease;
   z-index: 30;
@@ -916,7 +916,7 @@
 .right-panel.drawer-open { transform: translateX(0); }
 
 .right-panel-backdrop {
-  position: fixed; inset: 48px 0 0 0;
+  position: fixed; inset: var(--header-height) 0 0 0;
   background: rgba(0,0,0,0.2);
   z-index: 29;
   opacity: 0;
@@ -933,16 +933,16 @@
 .btn-chat-drawer-toggle {
   margin-left: auto;
   display: inline-flex; align-items: center; gap: 6px;
-  background: #fff; color: #1a1a1a;
-  border: 1px solid #d4d4d4; border-radius: 5px;
-  padding: 4px 10px; font-size: 12px; font-weight: 600; cursor: pointer;
+  background: var(--c-white); color: var(--c-ink);
+  border: 1px solid var(--c-gray-300); border-radius: var(--radius-md);
+  padding: 4px 10px; font-size: var(--text-sm); font-weight: 600; cursor: pointer;
 }
-.btn-chat-drawer-toggle.active { background: #1a1a1a; color: #fff; border-color: #1a1a1a; }
+.btn-chat-drawer-toggle.active { background: var(--c-ink); color: var(--c-white); border-color: var(--c-ink); }
 .btn-chat-drawer-toggle .badge {
-  font-size: 10px; padding: 1px 6px;
-  background: #b45309; color: #fff; border-radius: 10px;
+  font-size: var(--text-2xs); padding: 1px 6px;
+  background: var(--c-warning-accent); color: var(--c-white); border-radius: var(--radius-xl);
 }
-.btn-chat-drawer-toggle.active .badge { background: #fff; color: #1a1a1a; }
+.btn-chat-drawer-toggle.active .badge { background: var(--c-white); color: var(--c-ink); }
 
 /* When the drawer is open at narrow widths, scoot the editor toolbar's
    content left so the Chat toggle button is not hidden under the drawer.
@@ -977,25 +977,25 @@
 }
 .chat-header {
   padding: 10px 14px;
-  border-bottom: 1px solid #f0f0ee;
-  background: #fafafa;
+  border-bottom: 1px solid var(--c-gray-150);
+  background: var(--c-gray-50);
   display: flex; flex-direction: column; gap: 4px;
 }
 .chat-header-row { display: flex; align-items: center; justify-content: space-between; gap: 8px; }
-.chat-header-title { font-size: 12px; color: #555; }
+.chat-header-title { font-size: var(--text-sm); color: var(--c-gray-500); }
 .chat-fork-link {
   background: none; border: none; padding: 0;
-  font-size: 11px; color: #5b5bd6; cursor: pointer;
+  font-size: var(--text-xs); color: var(--c-accent); cursor: pointer;
 }
 .chat-thread-disclosure {
-  font-size: 11px; color: #888;
+  font-size: var(--text-xs); color: var(--c-gray-500);
   display: flex; gap: 4px; align-items: center;
 }
-.chat-thread-flag-count { color: #b45309; }
+.chat-thread-flag-count { color: var(--c-warning-accent); }
 .chat-filter-clear {
   margin-left: auto;
   background: none; border: none; cursor: pointer;
-  font-size: 11px; color: #5b5bd6;
+  font-size: var(--text-xs); color: var(--c-accent);
 }
 .chat-messages {
   flex: 1; overflow-y: auto;
@@ -1007,7 +1007,7 @@
   align-items: center; justify-content: center;
   text-align: center; padding: 24px;
 }
-.chat-empty p { font-size: 13px; color: #999; line-height: 1.6; max-width: 240px; }
+.chat-empty p { font-size: var(--text-base); color: var(--c-gray-500); line-height: 1.6; max-width: 240px; }
 
 .chat-message { display: flex; flex-direction: column; gap: 3px; }
 .chat-message.user { align-items: flex-end; }
@@ -1018,37 +1018,37 @@
 
 .chat-bubble {
   max-width: 92%;
-  padding: 8px 11px; border-radius: 14px;
-  font-size: 13px; line-height: 1.55;
+  padding: 8px 11px; border-radius: var(--radius-xl);
+  font-size: var(--text-base); line-height: 1.55;
   white-space: pre-wrap; word-break: break-word;
 }
 .chat-message.user .chat-bubble {
-  background: #1a1a1a; color: #fff; border-bottom-right-radius: 4px;
+  background: var(--c-ink); color: var(--c-white); border-bottom-right-radius: 4px;
 }
 .chat-message.assistant .chat-bubble {
-  background: #f3f4f6; color: #1a1a1a; border-bottom-left-radius: 4px;
+  background: var(--c-gray-100); color: var(--c-ink); border-bottom-left-radius: 4px;
 }
 .chat-message.streaming .chat-bubble { opacity: 0.85; }
-.chat-thinking { color: #999; font-style: italic; }
+.chat-thinking { color: var(--c-gray-500); font-style: italic; }
 .chat-cursor {
   display: inline-block; width: 2px; height: 12px;
-  background: #7c3aed; margin-left: 2px; vertical-align: middle;
+  background: var(--c-violet); margin-left: 2px; vertical-align: middle;
   animation: blink 0.75s step-end infinite;
 }
 @keyframes blink { 0%, 100% { opacity: 1; } 50% { opacity: 0; } }
 
 .chat-quote {
-  font-size: 11px; color: #888; font-style: italic;
-  border-left: 2px solid #d1d5db; padding-left: 7px; margin-bottom: 3px;
+  font-size: var(--text-xs); color: var(--c-gray-500); font-style: italic;
+  border-left: 2px solid var(--c-gray-300); padding-left: 7px; margin-bottom: 3px;
   max-width: 92%; align-self: flex-end;
   white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
 }
 .chat-anchor-preview {
-  font-size: 10px; color: #888; font-style: italic;
+  font-size: var(--text-2xs); color: var(--c-gray-500); font-style: italic;
 }
 
 .chat-model-label {
-  font-size: 11px; font-weight: 700;
+  font-size: var(--text-xs); font-weight: 700;
   display: flex; align-items: center; gap: 4px; padding-left: 2px;
 }
 .chat-model-dot { width: 6px; height: 6px; border-radius: 50%; }
@@ -1056,73 +1056,73 @@
 .chat-change-hint {
   align-self: flex-start;
   background: none; border: none; padding: 0;
-  font-size: 11px; color: #7c3aed; font-weight: 600;
+  font-size: var(--text-xs); color: var(--c-violet); font-weight: 600;
   cursor: pointer;
 }
-.chat-change-hint.discuss { color: #b45309; }
+.chat-change-hint.discuss { color: var(--c-warning-accent); }
 .chat-change-hint-cta {
   background: none; border: none; padding: 0;
-  color: #5b5bd6; font-weight: 600; cursor: pointer; text-decoration: underline;
+  color: var(--c-accent); font-weight: 600; cursor: pointer; text-decoration: underline;
 }
 
 .chat-system-bubble {
-  font-size: 11px; color: #888; font-style: italic;
-  border-top: 1px dashed #e5e5e5; padding-top: 8px;
+  font-size: var(--text-xs); color: var(--c-gray-500); font-style: italic;
+  border-top: 1px dashed var(--c-gray-200); padding-top: 8px;
 }
 .chat-flag-row {
   display: flex; gap: 8px;
   padding: 8px 10px;
-  background: #fff7ed; border: 1px solid #fdba74; border-radius: 8px;
+  background: var(--c-warning-bg-soft); border: 1px solid #fdba74; border-radius: var(--radius-lg);
 }
-.chat-flag-icon { color: #c2410c; font-size: 14px; }
+.chat-flag-icon { color: #c2410c; font-size: var(--text-md); }
 .chat-flag-content { flex: 1; }
-.chat-flag-author { font-size: 11px; font-weight: 700; color: #9a3412; }
-.chat-flag-text { font-size: 13px; color: #1a1a1a; margin-top: 2px; }
+.chat-flag-author { font-size: var(--text-xs); font-weight: 700; color: #9a3412; }
+.chat-flag-text { font-size: var(--text-base); color: var(--c-ink); margin-top: 2px; }
 .chat-flag-resolve {
   margin-top: 6px;
   background: none; border: 1px solid #fdba74;
-  border-radius: 5px; padding: 2px 8px;
-  font-size: 11px; color: #c2410c; cursor: pointer;
+  border-radius: var(--radius-md); padding: 2px 8px;
+  font-size: var(--text-xs); color: #c2410c; cursor: pointer;
 }
 
 /* ── Change panel ──────────────────────────────────────────────── */
 
 .change-panel {
-  border-top: 1px solid #e5e5e5;
+  border-top: 1px solid var(--c-gray-200);
   display: flex; flex-direction: column;
   overflow: hidden; flex-shrink: 0;
   max-height: 50%;
 }
 .change-panel-header {
   padding: 12px 14px;
-  font-size: 13px; font-weight: 600;
-  border-bottom: 1px solid #f0f0ee;
+  font-size: var(--text-base); font-weight: 600;
+  border-bottom: 1px solid var(--c-gray-150);
   display: flex; align-items: center; gap: 8px;
 }
 .badge {
-  background: #b45309; color: #fff;
-  font-size: 11px; padding: 2px 7px; border-radius: 10px;
+  background: var(--c-warning-accent); color: var(--c-white);
+  font-size: var(--text-xs); padding: 2px 7px; border-radius: var(--radius-xl);
 }
 .change-list { flex: 1; overflow-y: auto; padding: 8px; }
 .change-group-label {
-  font-size: 10px; font-weight: 700;
+  font-size: var(--text-2xs); font-weight: 700;
   text-transform: uppercase; letter-spacing: 0.06em;
-  color: #aaa; padding: 8px 6px 4px;
+  color: var(--c-gray-400); padding: 8px 6px 4px;
 }
-.change-group-label.muted { color: #ccc; }
+.change-group-label.muted { color: var(--c-gray-300); }
 
 .change-item {
-  border-radius: 8px;
+  border-radius: var(--radius-lg);
   padding: 10px;
   margin-bottom: 8px;
-  border: 1px solid #e5e5e5;
-  font-size: 13px;
+  border: 1px solid var(--c-gray-200);
+  font-size: var(--text-base);
 }
-.change-item.type-claude { border-left: 3px solid #5b5bd6; }
-.change-item.type-manual { border-left: 3px solid #888; }
+.change-item.type-claude { border-left: 3px solid var(--c-accent); }
+.change-item.type-manual { border-left: 3px solid var(--c-gray-500); }
 .change-item.state-accepted { opacity: 0.5; }
 .change-item.state-declined { opacity: 0.4; }
-.change-item.stale { border-color: #fbbf24; background: #fffbeb; }
+.change-item.stale { border-color: #fbbf24; background: var(--c-warning-bg-soft); }
 .change-item.focused {
   animation: change-focus-flash 1.8s ease forwards;
 }
@@ -1135,23 +1135,23 @@
   display: flex; align-items: center; justify-content: space-between;
   margin-bottom: 6px;
 }
-.change-author { font-weight: 600; font-size: 12px; }
+.change-author { font-weight: 600; font-size: var(--text-sm); }
 .change-state-badge {
-  font-size: 10px; padding: 2px 7px; border-radius: 10px;
+  font-size: var(--text-2xs); padding: 2px 7px; border-radius: var(--radius-xl);
   font-weight: 600; text-transform: uppercase; letter-spacing: 0.05em;
 }
-.change-state-badge.pending { background: #fef3c7; color: #92400e; }
-.change-state-badge.accepted { background: #dcfce7; color: #166534; }
-.change-state-badge.declined { background: #f1f5f9; color: #94a3b8; }
-.change-state-badge.stale { background: #fef3c7; color: #92400e; }
-.change-label { color: #444; margin-bottom: 6px; line-height: 1.4; }
+.change-state-badge.pending { background: var(--c-warning-bg); color: var(--c-warning-fg); }
+.change-state-badge.accepted { background: var(--c-success-bg); color: var(--c-success-fg); }
+.change-state-badge.declined { background: #f1f5f9; color: var(--c-gray-400); }
+.change-state-badge.stale { background: var(--c-warning-bg); color: var(--c-warning-fg); }
+.change-label { color: var(--c-gray-600); margin-bottom: 6px; line-height: 1.4; }
 .change-stale-banner {
-  font-size: 11px; color: #92400e;
-  background: #fef3c7; border-radius: 4px;
+  font-size: var(--text-xs); color: var(--c-warning-fg);
+  background: var(--c-warning-bg); border-radius: var(--radius-sm);
   padding: 4px 8px; margin-bottom: 6px;
 }
 .change-manual-status {
-  font-size: 11px; color: #888;
+  font-size: var(--text-xs); color: var(--c-gray-500);
   display: flex; align-items: center; justify-content: space-between;
   margin-top: 6px;
 }
@@ -1168,121 +1168,121 @@
   display: flex; flex-direction: column; gap: 6px;
 }
 .change-manual-diff-block {
-  font-size: 12px; line-height: 1.6;
-  background: #f9fafb; border-radius: 4px;
-  padding: 6px 8px; border: 1px solid #e5e5e5;
+  font-size: var(--text-sm); line-height: 1.6;
+  background: var(--c-gray-50); border-radius: var(--radius-sm);
+  padding: 6px 8px; border: 1px solid var(--c-gray-200);
   white-space: pre-wrap; word-break: break-word;
 }
 .change-manual-diff .manual-diff-insert {
-  background: #dcfce7; color: #166534;
-  border-radius: 2px; padding: 1px 2px;
+  background: var(--c-success-bg); color: var(--c-success-fg);
+  border-radius: var(--radius-xs); padding: 1px 2px;
 }
 .change-manual-diff .manual-diff-delete {
-  background: #fee2e2; color: #991b1b;
+  background: var(--c-danger-bg); color: var(--c-danger-fg);
   text-decoration: line-through;
-  border-radius: 2px; padding: 1px 2px;
+  border-radius: var(--radius-xs); padding: 1px 2px;
 }
 .btn-save-now {
-  background: none; border: 1px solid #d4d4d4;
-  border-radius: 4px; padding: 2px 8px;
-  font-size: 11px; font-weight: 600; cursor: pointer;
+  background: none; border: 1px solid var(--c-gray-300);
+  border-radius: var(--radius-sm); padding: 2px 8px;
+  font-size: var(--text-xs); font-weight: 600; cursor: pointer;
 }
 .change-source-link {
   background: none; border: none; padding: 0;
-  font-size: 11px; color: #5b5bd6; cursor: pointer;
+  font-size: var(--text-xs); color: var(--c-accent); cursor: pointer;
   display: block; margin-top: 4px;
 }
 .change-actions { display: flex; gap: 6px; margin-top: 8px; flex-wrap: wrap; }
 .btn-accept {
-  background: #166534; color: #fff;
-  border: none; border-radius: 5px;
-  padding: 5px 10px; font-size: 12px; font-weight: 600; cursor: pointer;
+  background: var(--c-success-fg); color: var(--c-white);
+  border: none; border-radius: var(--radius-md);
+  padding: 5px 10px; font-size: var(--text-sm); font-weight: 600; cursor: pointer;
 }
 .btn-edit {
-  background: none; border: 1px solid #c4b5fd; color: #7c3aed;
-  border-radius: 5px; padding: 5px 10px; font-size: 12px; font-weight: 600; cursor: pointer;
+  background: none; border: 1px solid #c4b5fd; color: var(--c-violet);
+  border-radius: var(--radius-md); padding: 5px 10px; font-size: var(--text-sm); font-weight: 600; cursor: pointer;
 }
 .btn-decline {
-  background: none; border: 1px solid #e5e5e5;
-  border-radius: 5px; padding: 5px 10px; font-size: 12px; cursor: pointer;
+  background: none; border: 1px solid var(--c-gray-200);
+  border-radius: var(--radius-md); padding: 5px 10px; font-size: var(--text-sm); cursor: pointer;
 }
 .btn-reask {
-  background: none; border: 1px solid #fbbf24; color: #92400e;
-  border-radius: 5px; padding: 5px 10px; font-size: 12px; font-weight: 600; cursor: pointer;
+  background: none; border: 1px solid #fbbf24; color: var(--c-warning-fg);
+  border-radius: var(--radius-md); padding: 5px 10px; font-size: var(--text-sm); font-weight: 600; cursor: pointer;
 }
 .diff-edit-textarea {
-  width: 100%; font-size: 12px; font-family: inherit;
+  width: 100%; font-size: var(--text-sm); font-family: inherit;
   line-height: 1.5; border: 1px solid #c4b5fd;
-  border-radius: 4px; padding: 6px; resize: vertical;
+  border-radius: var(--radius-sm); padding: 6px; resize: vertical;
 }
 .inline-diff {
-  font-size: 12px; line-height: 1.7;
-  background: #f9fafb; border-radius: 4px;
+  font-size: var(--text-sm); line-height: 1.7;
+  background: var(--c-gray-50); border-radius: var(--radius-sm);
   padding: 8px 10px;
   white-space: pre-wrap; word-break: break-word;
-  border: 1px solid #e5e5e5;
+  border: 1px solid var(--c-gray-200);
 }
 .diff-word-add {
-  background: #dcfce7; color: #166534;
-  border-radius: 2px; padding: 1px 1px;
+  background: var(--c-success-bg); color: var(--c-success-fg);
+  border-radius: var(--radius-xs); padding: 1px 1px;
 }
 .diff-word-remove {
-  background: #fee2e2; color: #991b1b;
+  background: var(--c-danger-bg); color: var(--c-danger-fg);
   text-decoration: line-through;
-  border-radius: 2px; padding: 1px 1px;
+  border-radius: var(--radius-xs); padding: 1px 1px;
 }
-.text-fade { color: #aaa; }
+.text-fade { color: var(--c-gray-400); }
 .expand-toggle {
   display: block; margin-top: 5px;
   background: none; border: none; padding: 0;
-  font-size: 11px; font-weight: 600; color: #7c3aed;
+  font-size: var(--text-xs); font-weight: 600; color: var(--c-violet);
   cursor: pointer; text-decoration: underline;
 }
 
 .change-stub {
   display: flex; align-items: center; gap: 6px;
-  font-size: 11px; color: #888;
-  padding: 4px 6px; border-bottom: 1px solid #f5f5f5;
+  font-size: var(--text-xs); color: var(--c-gray-500);
+  padding: 4px 6px; border-bottom: 1px solid var(--c-gray-100);
 }
-.change-stub .stub-author { font-weight: 600; color: #555; }
+.change-stub .stub-author { font-weight: 600; color: var(--c-gray-500); }
 .change-stub .stub-badge {
-  font-size: 9px; padding: 1px 5px; border-radius: 8px;
+  font-size: 9px; padding: 1px 5px; border-radius: var(--radius-lg);
 }
-.change-stub .stub-badge.accepted { background: #dcfce7; color: #166534; }
-.change-stub .stub-badge.declined { background: #f1f5f9; color: #94a3b8; }
-.change-stub .stub-reason { flex: 1; color: #777; }
+.change-stub .stub-badge.accepted { background: var(--c-success-bg); color: var(--c-success-fg); }
+.change-stub .stub-badge.declined { background: #f1f5f9; color: var(--c-gray-400); }
+.change-stub .stub-reason { flex: 1; color: var(--c-gray-500); }
 .change-stub .stub-source-link {
   background: none; border: none; padding: 0;
-  font-size: 11px; color: #5b5bd6; cursor: pointer;
+  font-size: var(--text-xs); color: var(--c-accent); cursor: pointer;
 }
 
 .contribution-cta {
-  border-top: 1px solid #e5e5e5;
-  background: #fafafa;
+  border-top: 1px solid var(--c-gray-200);
+  background: var(--c-gray-50);
   padding: 16px;
   text-align: center;
 }
 .contribution-cta-count {
-  font-size: 13px; font-weight: 600; color: #1a1a1a;
+  font-size: var(--text-base); font-weight: 600; color: var(--c-ink);
 }
 .contribution-cta-desc {
-  font-size: 12px; color: #666; margin: 6px 0 12px;
+  font-size: var(--text-sm); color: var(--c-gray-500); margin: 6px 0 12px;
 }
 .btn-start-contribution {
-  background: #1a1a1a; color: #fff;
-  border: none; border-radius: 6px;
+  background: var(--c-ink); color: var(--c-white);
+  border: none; border-radius: var(--radius-md);
   padding: 8px 14px;
-  font-size: 13px; font-weight: 600; cursor: pointer;
+  font-size: var(--text-base); font-weight: 600; cursor: pointer;
 }
 
 /* ── ChangeTooltip (shared between the Phase 3 preview-pane overlay
    and the §8.10 hover affordance) ─────────────────────────────────── */
 
 .diff-tooltip {
-  background: #fff; border: 1px solid #e5e5e5;
-  border-radius: 8px; padding: 10px 12px;
+  background: var(--c-white); border: 1px solid var(--c-gray-200);
+  border-radius: var(--radius-lg); padding: 10px 12px;
   box-shadow: 0 6px 24px rgba(0,0,0,0.12);
-  max-width: 320px; font-size: 12px;
+  max-width: 320px; font-size: var(--text-sm);
   z-index: 200;
 }
 .diff-tooltip-header {
@@ -1290,92 +1290,92 @@
   margin-bottom: 6px;
 }
 .diff-tooltip-badge {
-  font-size: 10px; padding: 2px 7px; border-radius: 8px;
+  font-size: var(--text-2xs); padding: 2px 7px; border-radius: var(--radius-lg);
   font-weight: 700; text-transform: uppercase; letter-spacing: 0.04em;
 }
-.diff-tooltip-badge--manual { background: #f1f5f9; color: #475569; }
-.diff-tooltip-badge--edited { background: #faf5ff; color: #7c3aed; }
+.diff-tooltip-badge--manual { background: #f1f5f9; color: var(--c-gray-600); }
+.diff-tooltip-badge--edited { background: #faf5ff; color: var(--c-violet); }
 .diff-tooltip-prompt {
-  border-top: 1px solid #f0f0ee;
+  border-top: 1px solid var(--c-gray-150);
   padding-top: 6px;
-  font-size: 11px; color: #444;
+  font-size: var(--text-xs); color: var(--c-gray-600);
 }
 .diff-tooltip-quote {
-  font-style: italic; color: #888; margin-bottom: 4px;
+  font-style: italic; color: var(--c-gray-500); margin-bottom: 4px;
 }
 .diff-tooltip-reason {
-  border-top: 1px solid #f0f0ee;
+  border-top: 1px solid var(--c-gray-150);
   padding-top: 6px; margin-top: 6px;
-  color: #555;
+  color: var(--c-gray-500);
 }
 .diff-tooltip-reason-label {
   display: inline-block; font-size: 9px; font-weight: 700;
-  color: #888; text-transform: uppercase; letter-spacing: 0.04em;
+  color: var(--c-gray-500); text-transform: uppercase; letter-spacing: 0.04em;
   margin-right: 6px;
 }
 .diff-tooltip-no-context {
-  font-size: 11px; color: #aaa; font-style: italic;
+  font-size: var(--text-xs); color: var(--c-gray-400); font-style: italic;
 }
 
 /* ── Slice 3: the §10 PR flow surfaces ─────────────────────────────── */
 
 .pr-modal { max-width: 640px; }
 .pr-modal-warning {
-  background: #fef3c7; border: 1px solid #fbbf24;
-  padding: 10px 12px; border-radius: 6px; margin-bottom: 14px;
-  font-size: 12px; line-height: 1.5;
+  background: var(--c-warning-bg); border: 1px solid #fbbf24;
+  padding: 10px 12px; border-radius: var(--radius-md); margin-bottom: 14px;
+  font-size: var(--text-sm); line-height: 1.5;
 }
 .pr-modal-warning p { margin: 0 0 6px 0; }
 .modal-label {
-  display: block; font-size: 11px; font-weight: 600;
-  color: #555; margin: 10px 0 4px; text-transform: uppercase;
+  display: block; font-size: var(--text-xs); font-weight: 600;
+  color: var(--c-gray-500); margin: 10px 0 4px; text-transform: uppercase;
   letter-spacing: 0.04em;
 }
 .modal-input, .modal-textarea {
-  width: 100%; padding: 7px 10px; font-size: 13px;
-  border: 1px solid #d1d5db; border-radius: 4px; box-sizing: border-box;
+  width: 100%; padding: 7px 10px; font-size: var(--text-base);
+  border: 1px solid var(--c-gray-300); border-radius: var(--radius-sm); box-sizing: border-box;
   font-family: inherit;
 }
 .modal-textarea { resize: vertical; min-height: 100px; }
-.btn-open-pr { background: #1a1a1a; color: #fff; border: none;
-  padding: 4px 10px; border-radius: 4px; font-size: 12px; cursor: pointer; }
-.btn-open-pr:hover { background: #333; }
+.btn-open-pr { background: var(--c-ink); color: var(--c-white); border: none;
+  padding: 4px 10px; border-radius: var(--radius-sm); font-size: var(--text-sm); cursor: pointer; }
+.btn-open-pr:hover { background: var(--c-gray-700); }
 
 /* PR view header strip + two-column body */
 .pr-view { display: flex; flex-direction: column; height: 100%; }
 .pr-header {
   display: grid; grid-template-columns: 1fr auto; gap: 16px;
-  padding: 14px 18px; border-bottom: 1px solid #e5e7eb;
-  background: #fafafa;
+  padding: 14px 18px; border-bottom: 1px solid var(--c-gray-200);
+  background: var(--c-gray-50);
 }
 .pr-header-left { min-width: 0; }
-.pr-breadcrumb { font-size: 11px; color: #666; margin-bottom: 6px; }
-.pr-breadcrumb a { color: #5b5bd6; text-decoration: none; }
+.pr-breadcrumb { font-size: var(--text-xs); color: var(--c-gray-500); margin-bottom: 6px; }
+.pr-breadcrumb a { color: var(--c-accent); text-decoration: none; }
 .pr-breadcrumb a:hover { text-decoration: underline; }
-.pr-title { font-size: 18px; margin: 0 0 6px 0; }
-.pr-description { font-size: 13px; color: #444; margin: 0 0 6px 0; line-height: 1.55; }
+.pr-title { font-size: var(--text-xl); margin: 0 0 6px 0; }
+.pr-description { font-size: var(--text-base); color: var(--c-gray-600); margin: 0 0 6px 0; line-height: 1.55; }
 .pr-header-edit { display: flex; flex-direction: column; gap: 8px; }
 .pr-header-right {
   display: flex; flex-direction: column; align-items: flex-end; gap: 8px;
-  font-size: 12px;
+  font-size: var(--text-sm);
 }
 .pr-state-banner {
-  padding: 3px 10px; border-radius: 12px;
-  font-size: 11px; font-weight: 600; text-transform: uppercase;
+  padding: 3px 10px; border-radius: var(--radius-xl);
+  font-size: var(--text-xs); font-weight: 600; text-transform: uppercase;
   letter-spacing: 0.04em;
 }
-.pr-state-banner.open { background: #dcfce7; color: #14532d; }
+.pr-state-banner.open { background: var(--c-success-bg); color: #14532d; }
 .pr-state-banner.merged { background: #ddd6fe; color: #4c1d95; }
-.pr-state-banner.withdrawn { background: #fef3c7; color: #78350f; }
-.pr-state-banner.closed { background: #e5e7eb; color: #374151; }
-.pr-counts { display: flex; gap: 12px; font-size: 11px; color: #555; }
-.pr-count-flags { color: #b45309; font-weight: 600; font-size: 13px; }
-.pr-supersedes { font-size: 11px; color: #6b7280; }
-.pr-supersedes a { color: #5b5bd6; text-decoration: none; }
+.pr-state-banner.withdrawn { background: var(--c-warning-bg); color: #78350f; }
+.pr-state-banner.closed { background: var(--c-gray-200); color: var(--c-gray-700); }
+.pr-counts { display: flex; gap: 12px; font-size: var(--text-xs); color: var(--c-gray-500); }
+.pr-count-flags { color: var(--c-warning-accent); font-weight: 600; font-size: var(--text-base); }
+.pr-supersedes { font-size: var(--text-xs); color: var(--c-gray-500); }
+.pr-supersedes a { color: var(--c-accent); text-decoration: none; }
 .pr-conflict-banner {
-  background: #fee2e2; border: 1px solid #fca5a5;
-  padding: 10px 12px; border-radius: 6px;
-  font-size: 12px; line-height: 1.5; max-width: 320px;
+  background: var(--c-danger-bg); border: 1px solid var(--c-danger-border);
+  padding: 10px 12px; border-radius: var(--radius-md);
+  font-size: var(--text-sm); line-height: 1.5; max-width: 320px;
 }
 .pr-conflict-banner p { margin: 0 0 8px 0; }
 .pr-actions { display: flex; gap: 8px; }
@@ -1384,204 +1384,204 @@
 
 .diff-mode-toolbar {
   display: flex; gap: 12px; align-items: center;
-  padding: 6px 12px; border-bottom: 1px solid #f0f0ee;
-  font-size: 12px;
+  padding: 6px 12px; border-bottom: 1px solid var(--c-gray-150);
+  font-size: var(--text-sm);
 }
 .diff-mode-toolbar .btn-link.active {
-  font-weight: 600; color: #1a1a1a;
+  font-weight: 600; color: var(--c-ink);
 }
 .pr-diff-accent {
   margin-left: auto;
-  font-size: 11px; color: #5b5bd6; font-weight: 600;
+  font-size: var(--text-xs); color: var(--c-accent); font-weight: 600;
 }
 
-.diff-pane { flex: 1; overflow: auto; font-family: 'SF Mono', Monaco, monospace; font-size: 12px; }
-.diff-pane.diff-split { display: grid; grid-template-columns: 1fr 1fr; gap: 1px; background: #e5e7eb; }
-.diff-col { background: #fff; overflow: auto; }
+.diff-pane { flex: 1; overflow: auto; font-family: 'SF Mono', Monaco, monospace; font-size: var(--text-sm); }
+.diff-pane.diff-split { display: grid; grid-template-columns: 1fr 1fr; gap: 1px; background: var(--c-gray-200); }
+.diff-col { background: var(--c-white); overflow: auto; }
 .diff-col-header {
-  padding: 4px 10px; background: #f3f4f6; font-weight: 600;
-  font-size: 11px; color: #555; border-bottom: 1px solid #e5e7eb;
+  padding: 4px 10px; background: var(--c-gray-100); font-weight: 600;
+  font-size: var(--text-xs); color: var(--c-gray-500); border-bottom: 1px solid var(--c-gray-200);
 }
 .diff-row {
   display: flex; padding: 1px 8px;
   white-space: pre-wrap; word-break: break-word; line-height: 1.5;
 }
-.diff-row.diff-equal { color: #374151; }
-.diff-row.diff-del { background: #fee2e2; color: #7f1d1d; }
-.diff-row.diff-add { background: #dcfce7; color: #14532d; }
-.diff-row.diff-empty { background: #f9fafb; color: #d1d5db; }
+.diff-row.diff-equal { color: var(--c-gray-700); }
+.diff-row.diff-del { background: var(--c-danger-bg); color: #7f1d1d; }
+.diff-row.diff-add { background: var(--c-success-bg); color: #14532d; }
+.diff-row.diff-empty { background: var(--c-gray-50); color: var(--c-gray-300); }
 .diff-marker { width: 16px; opacity: 0.5; user-select: none; }
 .diff-text { flex: 1; }
 
 /* PR conversation — chat + review interleaved */
 .pr-conversation { padding: 10px 12px; overflow-y: auto; }
 .pr-conv-disclosure {
-  display: flex; gap: 12px; font-size: 11px; color: #6b7280;
-  padding-bottom: 6px; border-bottom: 1px solid #f0f0ee; margin-bottom: 10px;
+  display: flex; gap: 12px; font-size: var(--text-xs); color: var(--c-gray-500);
+  padding-bottom: 6px; border-bottom: 1px solid var(--c-gray-150); margin-bottom: 10px;
 }
-.thread-disclosure strong { color: #1a1a1a; }
+.thread-disclosure strong { color: var(--c-ink); }
 .chat-feed { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 12px; }
 .chat-msg {
   display: flex; flex-direction: column; gap: 4px;
-  padding: 8px 10px; border-radius: 6px; background: #f9fafb;
-  font-size: 12px; line-height: 1.55;
+  padding: 8px 10px; border-radius: var(--radius-md); background: var(--c-gray-50);
+  font-size: var(--text-sm); line-height: 1.55;
 }
-.chat-msg-review { background: #ede9fe; border-left: 3px solid #7c3aed; }
-.chat-msg-flag { background: #fef3c7; border-left: 3px solid #d97706; }
+.chat-msg-review { background: #ede9fe; border-left: 3px solid var(--c-violet); }
+.chat-msg-flag { background: var(--c-warning-bg); border-left: 3px solid #d97706; }
 .chat-msg-new { box-shadow: 0 0 0 2px #c7d2fe; }
-.chat-msg-header { display: flex; align-items: center; gap: 6px; font-size: 11px; color: #6b7280; }
+.chat-msg-header { display: flex; align-items: center; gap: 6px; font-size: var(--text-xs); color: var(--c-gray-500); }
 .chat-msg-badge {
-  font-size: 9px; font-weight: 700; padding: 1px 5px; border-radius: 3px;
+  font-size: 9px; font-weight: 700; padding: 1px 5px; border-radius: var(--radius-sm);
   text-transform: uppercase; letter-spacing: 0.04em;
 }
-.chat-msg-badge.review { background: #7c3aed; color: #fff; }
-.chat-msg-badge.flag { background: #d97706; color: #fff; }
-.chat-msg-author { font-weight: 600; color: #1a1a1a; }
-.chat-msg-new-pip { color: #5b5bd6; }
+.chat-msg-badge.review { background: var(--c-violet); color: var(--c-white); }
+.chat-msg-badge.flag { background: #d97706; color: var(--c-white); }
+.chat-msg-author { font-weight: 600; color: var(--c-ink); }
+.chat-msg-new-pip { color: var(--c-accent); }
 .chat-msg-quote {
-  background: #fff; border-left: 2px solid #d1d5db;
-  padding: 4px 8px; font-size: 11px; color: #6b7280;
+  background: var(--c-white); border-left: 2px solid var(--c-gray-300);
+  padding: 4px 8px; font-size: var(--text-xs); color: var(--c-gray-500);
   margin: 0; white-space: pre-wrap;
 }
 .chat-msg-body { white-space: pre-wrap; }
 
 .pr-review-composer {
-  border-top: 1px solid #e5e7eb; padding: 10px 12px;
-  background: #fafafa;
+  border-top: 1px solid var(--c-gray-200); padding: 10px 12px;
+  background: var(--c-gray-50);
 }
-.pr-review-quote { font-size: 11px; color: #6b7280; margin-bottom: 6px; }
-.pr-review-quote pre { background: #fff; padding: 4px 8px; border-radius: 4px; margin: 4px 0 0 0; }
+.pr-review-quote { font-size: var(--text-xs); color: var(--c-gray-500); margin-bottom: 6px; }
+.pr-review-quote pre { background: var(--c-white); padding: 4px 8px; border-radius: var(--radius-sm); margin: 4px 0 0 0; }
 
 /* ── Slice 5: §13 graduation dialog ──────────────────────────────────── */
 
 .modal-wide { width: min(720px, 92vw); }
-.modal-intro { margin: 0 0 16px 0; font-size: 13px; color: #4b5563; line-height: 1.55; }
+.modal-intro { margin: 0 0 16px 0; font-size: var(--text-base); color: var(--c-gray-600); line-height: 1.55; }
 
 .form-row { display: flex; flex-direction: column; gap: 4px; margin-bottom: 14px; }
-.form-row label { font-weight: 600; font-size: 12px; color: #1a1a1a; }
+.form-row label { font-weight: 600; font-size: var(--text-sm); color: var(--c-ink); }
 .form-row input, .form-row textarea {
-  font: inherit; padding: 6px 8px; border: 1px solid #d1d5db; border-radius: 4px;
+  font: inherit; padding: 6px 8px; border: 1px solid var(--c-gray-300); border-radius: var(--radius-sm);
 }
-.field-help { font-size: 11px; color: #6b7280; margin: 2px 0 0 0; }
-.field-error { font-size: 12px; color: #b91c1c; margin: 4px 0 0 0; }
+.field-help { font-size: var(--text-xs); color: var(--c-gray-500); margin: 2px 0 0 0; }
+.field-error { font-size: var(--text-sm); color: var(--c-danger-fg-strong); margin: 4px 0 0 0; }
 
 .owner-list {
   display: flex; flex-wrap: wrap; gap: 6px; min-height: 28px;
   padding: 4px 0;
 }
-.owner-empty { font-size: 12px; color: #6b7280; font-style: italic; }
+.owner-empty { font-size: var(--text-sm); color: var(--c-gray-500); font-style: italic; }
 .owner-chip {
   display: inline-flex; align-items: center; gap: 4px;
-  background: #eef2ff; color: #3730a3; padding: 2px 8px; border-radius: 99px;
-  font-size: 12px;
+  background: #eef2ff; color: #3730a3; padding: 2px 8px; border-radius: var(--radius-pill);
+  font-size: var(--text-sm);
 }
 .owner-chip-x {
-  background: none; border: none; cursor: pointer; color: #6b7280;
-  font-size: 14px; line-height: 1; padding: 0 2px;
+  background: none; border: none; cursor: pointer; color: var(--c-gray-500);
+  font-size: var(--text-md); line-height: 1; padding: 0 2px;
 }
-.owner-chip-x:hover { color: #b91c1c; }
+.owner-chip-x:hover { color: var(--c-danger-fg-strong); }
 .owner-picker { display: flex; gap: 6px; margin-top: 6px; }
 .owner-picker input { flex: 1; }
 
-.precondition-block { margin-top: 12px; padding: 10px; background: #fef2f2; border-radius: 6px; border: 1px solid #fecaca; }
+.precondition-block { margin-top: 12px; padding: 10px; background: var(--c-danger-bg); border-radius: var(--radius-md); border: 1px solid var(--c-danger-border); }
 .precondition-toggle {
-  background: none; border: none; cursor: pointer; color: #b91c1c; font-weight: 600;
-  font-size: 13px; padding: 0;
+  background: none; border: none; cursor: pointer; color: var(--c-danger-fg-strong); font-weight: 600;
+  font-size: var(--text-base); padding: 0;
 }
 .precondition-popover { margin-top: 8px; display: flex; flex-direction: column; gap: 8px; }
 .precondition-row {
   display: flex; justify-content: space-between; align-items: center;
-  background: #fff; padding: 8px 10px; border-radius: 4px; border: 1px solid #f3f4f6;
+  background: var(--c-white); padding: 8px 10px; border-radius: var(--radius-sm); border: 1px solid var(--c-gray-100);
 }
-.precondition-row-meta { font-size: 11px; color: #6b7280; }
-.precondition-row-actions a { color: #5b5bd6; }
-.precondition-help { font-size: 11px; color: #6b7280; margin: 4px 0 0 0; font-style: italic; }
+.precondition-row-meta { font-size: var(--text-xs); color: var(--c-gray-500); }
+.precondition-row-actions a { color: var(--c-accent); }
+.precondition-help { font-size: var(--text-xs); color: var(--c-gray-500); margin: 4px 0 0 0; font-style: italic; }
 
 .btn-graduate { margin-left: 6px; }
 
 .step-stack { display: flex; flex-direction: column; gap: 6px; margin: 12px 0; }
 .step-row {
   display: grid; grid-template-columns: 24px 1fr auto; gap: 10px; align-items: center;
-  padding: 8px 10px; border-radius: 6px; background: #f9fafb; border: 1px solid #f3f4f6;
+  padding: 8px 10px; border-radius: var(--radius-md); background: var(--c-gray-50); border: 1px solid var(--c-gray-100);
 }
 .step-row.step-running { background: #eff6ff; border-color: #bfdbfe; }
 .step-row.step-done    { background: #f0fdf4; border-color: #bbf7d0; }
-.step-row.step-failed  { background: #fef2f2; border-color: #fecaca; }
+.step-row.step-failed  { background: var(--c-danger-bg); border-color: var(--c-danger-border); }
 .step-row.step-not-reached { opacity: 0.45; }
 .step-marker {
   display: inline-block; width: 16px; height: 16px; border-radius: 50%;
-  background: #d1d5db;
+  background: var(--c-gray-300);
 }
-.step-marker-pending     { background: #d1d5db; }
+.step-marker-pending     { background: var(--c-gray-300); }
 .step-marker-running     { background: #3b82f6; animation: pulse 1s ease-in-out infinite; }
 .step-marker-done        { background: #10b981; }
 .step-marker-failed      { background: #ef4444; }
-.step-marker-not-reached { background: #e5e7eb; }
+.step-marker-not-reached { background: var(--c-gray-200); }
 @keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.4; } }
 
-.step-label { font-weight: 600; font-size: 13px; color: #1a1a1a; }
-.step-detail { font-size: 11px; color: #6b7280; margin-top: 2px; }
+.step-label { font-weight: 600; font-size: var(--text-base); color: var(--c-ink); }
+.step-detail { font-size: var(--text-xs); color: var(--c-gray-500); margin-top: 2px; }
 .step-status-pill {
-  font-size: 10px; font-weight: 700; padding: 2px 6px; border-radius: 3px;
+  font-size: var(--text-2xs); font-weight: 700; padding: 2px 6px; border-radius: var(--radius-sm);
   text-transform: uppercase; letter-spacing: 0.04em;
 }
-.pill-pending     { background: #e5e7eb; color: #4b5563; }
-.pill-running     { background: #3b82f6; color: #fff; }
-.pill-done        { background: #10b981; color: #fff; }
-.pill-failed      { background: #ef4444; color: #fff; }
-.pill-not-reached { background: #e5e7eb; color: #9ca3af; }
+.pill-pending     { background: var(--c-gray-200); color: var(--c-gray-600); }
+.pill-running     { background: #3b82f6; color: var(--c-white); }
+.pill-done        { background: #10b981; color: var(--c-white); }
+.pill-failed      { background: #ef4444; color: var(--c-white); }
+.pill-not-reached { background: var(--c-gray-200); color: var(--c-gray-400); }
 
 .rollback-divider {
-  margin: 10px 0 6px 0; font-size: 11px; text-transform: uppercase;
-  letter-spacing: 0.06em; color: #b91c1c; font-weight: 700;
+  margin: 10px 0 6px 0; font-size: var(--text-xs); text-transform: uppercase;
+  letter-spacing: 0.06em; color: var(--c-danger-fg-strong); font-weight: 700;
 }
 
 .what-happened {
-  margin-top: 14px; padding: 12px; background: #fef2f2;
-  border: 1px solid #fecaca; border-radius: 6px;
+  margin-top: 14px; padding: 12px; background: var(--c-danger-bg);
+  border: 1px solid var(--c-danger-border); border-radius: var(--radius-md);
 }
-.what-happened h3 { margin: 0 0 6px 0; font-size: 14px; color: #991b1b; }
-.what-happened p { margin: 0 0 6px 0; font-size: 13px; color: #4b5563; line-height: 1.55; }
+.what-happened h3 { margin: 0 0 6px 0; font-size: var(--text-md); color: var(--c-danger-fg); }
+.what-happened p { margin: 0 0 6px 0; font-size: var(--text-base); color: var(--c-gray-600); line-height: 1.55; }
 .graduation-complete {
   margin-top: 14px; padding: 12px; background: #f0fdf4;
-  border: 1px solid #bbf7d0; border-radius: 6px;
+  border: 1px solid #bbf7d0; border-radius: var(--radius-md);
 }
-.graduation-complete h3 { margin: 0 0 6px 0; font-size: 14px; color: #166534; }
-.graduation-complete p { margin: 0; font-size: 13px; color: #14532d; line-height: 1.55; }
+.graduation-complete h3 { margin: 0 0 6px 0; font-size: var(--text-md); color: var(--c-success-fg); }
+.graduation-complete p { margin: 0; font-size: var(--text-base); color: #14532d; line-height: 1.55; }
 
-.modal-progress-note { font-size: 12px; color: #6b7280; }
+.modal-progress-note { font-size: var(--text-sm); color: var(--c-gray-500); }
 .modal-error {
-  padding: 8px 12px; background: #fef2f2; color: #991b1b;
-  border-top: 1px solid #fecaca; font-size: 12px;
+  padding: 8px 12px; background: var(--c-danger-bg); color: var(--c-danger-fg);
+  border-top: 1px solid var(--c-danger-border); font-size: var(--text-sm);
 }
 .rfc-error-banner {
-  padding: 8px 12px; background: #fef2f2; color: #991b1b;
-  border-bottom: 1px solid #fecaca; font-size: 12px;
+  padding: 8px 12px; background: var(--c-danger-bg); color: var(--c-danger-fg);
+  border-bottom: 1px solid var(--c-danger-border); font-size: var(--text-sm);
 }
 
 .branch-dropdown-section {
-  font-size: 10px; text-transform: uppercase; letter-spacing: 0.06em;
-  color: #6b7280; padding: 8px 10px 4px 10px; font-weight: 700;
+  font-size: var(--text-2xs); text-transform: uppercase; letter-spacing: 0.06em;
+  color: var(--c-gray-500); padding: 8px 10px 4px 10px; font-weight: 700;
 }
 .branch-dropdown-item.pre-graduation {
-  font-style: italic; color: #4b5563;
+  font-style: italic; color: var(--c-gray-600);
 }
 .branch-dropdown-item.pre-graduation .branch-meta {
-  font-size: 10px; color: #9ca3af; margin-left: auto;
+  font-size: var(--text-2xs); color: var(--c-gray-400); margin-left: auto;
 }
 
 /* ---- §15 / Slice 6: inbox, badge, toasts ---- */
 
 .inbox-trigger {
-  position: relative; background: transparent; border: 1px solid #e5e7eb;
-  border-radius: 6px; padding: 4px 10px; cursor: pointer; font-size: 16px;
+  position: relative; background: transparent; border: 1px solid var(--c-gray-200);
+  border-radius: var(--radius-md); padding: 4px 10px; cursor: pointer; font-size: var(--text-lg);
   margin-right: 12px;
 }
-.inbox-trigger:hover { background: #f9fafb; }
+.inbox-trigger:hover { background: var(--c-gray-50); }
 .inbox-trigger .badge {
   position: absolute; top: -6px; right: -6px;
-  background: #dc2626; color: white; font-size: 10px;
-  border-radius: 999px; padding: 1px 5px; font-weight: 700;
+  background: #dc2626; color: white; font-size: var(--text-2xs);
+  border-radius: var(--radius-pill); padding: 1px 5px; font-weight: 700;
   min-width: 16px; text-align: center;
 }
 
@@ -1591,22 +1591,22 @@
   padding-top: 60px; z-index: 100;
 }
 .inbox-panel {
-  background: white; border: 1px solid #e5e7eb; border-radius: 8px;
+  background: white; border: 1px solid var(--c-gray-200); border-radius: var(--radius-lg);
   width: 720px; max-width: 90vw; max-height: 80vh;
   display: flex; flex-direction: column; box-shadow: 0 12px 32px rgba(0,0,0,0.18);
 }
 .inbox-header {
   display: flex; align-items: center; justify-content: space-between;
-  padding: 12px 16px; border-bottom: 1px solid #e5e7eb;
+  padding: 12px 16px; border-bottom: 1px solid var(--c-gray-200);
 }
-.inbox-header h2 { margin: 0; font-size: 16px; }
+.inbox-header h2 { margin: 0; font-size: var(--text-lg); }
 .inbox-filters {
   display: flex; gap: 8px; flex-wrap: wrap;
-  padding: 10px 16px; border-bottom: 1px solid #f3f4f6; align-items: center;
+  padding: 10px 16px; border-bottom: 1px solid var(--c-gray-100); align-items: center;
 }
 .inbox-filters .chip {
-  font-size: 12px; padding: 4px 8px; background: #f9fafb;
-  border: 1px solid #e5e7eb; border-radius: 999px;
+  font-size: var(--text-sm); padding: 4px 8px; background: var(--c-gray-50);
+  border: 1px solid var(--c-gray-200); border-radius: var(--radius-pill);
   display: inline-flex; align-items: center; gap: 4px;
 }
 .inbox-filters .chip input[type=checkbox] { margin-right: 2px; }
@@ -1614,40 +1614,40 @@
 
 .inbox-body { overflow-y: auto; flex: 1; }
 .inbox-list { list-style: none; margin: 0; padding: 0; }
-.inbox-row { border-bottom: 1px solid #f3f4f6; }
-.inbox-row.unread { background: #fffbeb; }
+.inbox-row { border-bottom: 1px solid var(--c-gray-100); }
+.inbox-row.unread { background: var(--c-warning-bg-soft); }
 .inbox-row-link {
   display: flex; align-items: center; gap: 10px; padding: 10px 16px;
   text-decoration: none; color: inherit;
 }
-.inbox-row-link:hover { background: #f9fafb; }
+.inbox-row-link:hover { background: var(--c-gray-50); }
 .inbox-cat {
   font-size: 9px; text-transform: uppercase; letter-spacing: 0.05em;
-  padding: 2px 6px; border-radius: 4px; font-weight: 700;
+  padding: 2px 6px; border-radius: var(--radius-sm); font-weight: 700;
 }
-.inbox-cat.cat-personal-direct { background: #fef3c7; color: #92400e; }
+.inbox-cat.cat-personal-direct { background: var(--c-warning-bg); color: var(--c-warning-fg); }
 .inbox-cat.cat-structural { background: #dbeafe; color: #1e40af; }
-.inbox-cat.cat-churn { background: #f3f4f6; color: #4b5563; }
-.inbox-summary { flex: 1; font-size: 13px; }
+.inbox-cat.cat-churn { background: var(--c-gray-100); color: var(--c-gray-600); }
+.inbox-summary { flex: 1; font-size: var(--text-base); }
 .inbox-bundle-count {
-  font-size: 11px; color: #6b7280;
-  background: #f3f4f6; padding: 1px 6px; border-radius: 999px;
+  font-size: var(--text-xs); color: var(--c-gray-500);
+  background: var(--c-gray-100); padding: 1px 6px; border-radius: var(--radius-pill);
 }
-.inbox-when { font-size: 11px; color: #9ca3af; }
+.inbox-when { font-size: var(--text-xs); color: var(--c-gray-400); }
 
 .toast-host {
   position: fixed; right: 16px; bottom: 16px;
   display: flex; flex-direction: column; gap: 8px; z-index: 200;
 }
 .toast {
-  padding: 10px 14px; background: white; border: 1px solid #e5e7eb;
-  border-left: 4px solid #6b7280; border-radius: 6px;
-  box-shadow: 0 4px 12px rgba(0,0,0,0.08); font-size: 13px;
+  padding: 10px 14px; background: white; border: 1px solid var(--c-gray-200);
+  border-left: 4px solid var(--c-gray-500); border-radius: var(--radius-md);
+  box-shadow: 0 4px 12px rgba(0,0,0,0.08); font-size: var(--text-base);
   max-width: 360px; cursor: pointer;
 }
 .toast.cat-personal-direct { border-left-color: #d97706; }
 .toast.cat-structural { border-left-color: #2563eb; }
-.toast.cat-churn { border-left-color: #6b7280; }
+.toast.cat-churn { border-left-color: var(--c-gray-500); }
 
 /* ── Slice 7: §14 chrome + /settings/notifications + /admin ──────────── */
 
@@ -1655,12 +1655,12 @@
    Admin entrypoints. The header's job is to be invisible until the user
    reaches for it, so these read as quiet text links rather than buttons. */
 .header-about, .header-settings, .header-admin {
-  color: #ddd; text-decoration: none;
-  font-size: 12px; letter-spacing: 0.02em;
-  padding: 4px 8px; border-radius: 4px;
+  color: var(--c-gray-300); text-decoration: none;
+  font-size: var(--text-sm); letter-spacing: 0.02em;
+  padding: 4px 8px; border-radius: var(--radius-sm);
 }
 .header-about:hover, .header-settings:hover, .header-admin:hover {
-  color: #fff; background: rgba(255,255,255,0.08);
+  color: var(--c-white); background: rgba(255,255,255,0.08);
 }
 .header-admin {
   color: #fbbf24;  /* admin link sits a notch warmer to signal authority */
@@ -1670,7 +1670,7 @@
    markdown styling; the header is a thin chrome strip. */
 .chrome-pane {
   flex: 1; min-width: 0; overflow: auto;
-  padding: 0; background: #fff;
+  padding: 0; background: var(--c-white);
 }
 
 .philosophy-page {
@@ -1680,50 +1680,50 @@
 .philosophy-header {
   display: flex; align-items: center; gap: 12px;
   padding: 12px 0 18px;
-  border-bottom: 1px solid #f0f0ee;
+  border-bottom: 1px solid var(--c-gray-150);
   margin-bottom: 28px;
 }
 .philosophy-back {
   border: none; background: none; cursor: pointer;
-  color: #4b5563; font-size: 13px;
-  padding: 4px 8px; border-radius: 4px;
+  color: var(--c-gray-600); font-size: var(--text-base);
+  padding: 4px 8px; border-radius: var(--radius-sm);
 }
-.philosophy-back:hover { background: #f3f4f6; color: #111; }
+.philosophy-back:hover { background: var(--c-gray-100); color: var(--c-gray-900); }
 .philosophy-title {
-  font-size: 13px; color: #6b7280;
+  font-size: var(--text-base); color: var(--c-gray-500);
   text-transform: uppercase; letter-spacing: 0.08em;
 }
 .philosophy-signin {
   margin-left: auto;
-  font-size: 13px; color: #4b5563; text-decoration: none;
+  font-size: var(--text-base); color: var(--c-gray-600); text-decoration: none;
 }
-.philosophy-signin:hover { color: #111; text-decoration: underline; }
+.philosophy-signin:hover { color: var(--c-gray-900); text-decoration: underline; }
 
 .philosophy-body h1 {
-  font-size: 28px; font-weight: 700; margin: 0 0 24px;
+  font-size: var(--text-3xl); font-weight: 700; margin: 0 0 24px;
   letter-spacing: -0.01em;
 }
 .philosophy-body h2 {
-  font-size: 19px; font-weight: 600; margin: 36px 0 12px;
-  color: #111;
+  font-size: var(--text-xl); font-weight: 600; margin: 36px 0 12px;
+  color: var(--c-gray-900);
 }
 .philosophy-body h3 {
-  font-size: 15px; font-weight: 600; margin: 24px 0 10px;
+  font-size: var(--text-lg); font-weight: 600; margin: 24px 0 10px;
 }
 .philosophy-body p {
-  margin: 0 0 16px; line-height: 1.65; font-size: 15px; color: #1f2937;
+  margin: 0 0 16px; line-height: 1.65; font-size: var(--text-lg); color: var(--c-gray-800);
 }
-.philosophy-body em { color: #4b5563; font-style: italic; }
-.philosophy-body strong { color: #111; }
+.philosophy-body em { color: var(--c-gray-600); font-style: italic; }
+.philosophy-body strong { color: var(--c-gray-900); }
 .philosophy-body ul, .philosophy-body ol {
   margin: 0 0 20px; padding-left: 24px;
 }
 .philosophy-body li { margin-bottom: 8px; line-height: 1.6; }
 .philosophy-body hr {
-  border: none; border-top: 1px solid #e5e7eb; margin: 32px 0;
+  border: none; border-top: 1px solid var(--c-gray-200); margin: 32px 0;
 }
 .philosophy-body code {
-  background: #f3f4f6; padding: 1px 5px; border-radius: 3px;
+  background: var(--c-gray-100); padding: 1px 5px; border-radius: var(--radius-sm);
   font-size: 0.92em;
 }
 
@@ -1738,13 +1738,13 @@
   list-style: none; padding: 0;
   margin: 48px 0 0; text-align: left;
   display: flex; flex-direction: column; gap: 18px;
-  border-top: 1px solid #e5e7eb; padding-top: 32px;
+  border-top: 1px solid var(--c-gray-200); padding-top: 32px;
   max-width: 540px;
 }
 .landing-deck li {
-  font-size: 14px; line-height: 1.6; color: #374151;
+  font-size: var(--text-md); line-height: 1.6; color: var(--c-gray-700);
 }
-.landing-deck strong { color: #111; }
+.landing-deck strong { color: var(--c-gray-900); }
 
 /* Attribution line below the deck — names Wiggleverse RFC as the
    underlying software, so a reader can tell this instance (OHM, run
@@ -1752,11 +1752,11 @@
 .landing-attribution {
   max-width: 540px;
   margin: 32px 0 0; padding-top: 24px;
-  border-top: 1px solid #f0f0ee;
-  font-size: 12px; line-height: 1.6; color: #888;
+  border-top: 1px solid var(--c-gray-150);
+  font-size: var(--text-sm); line-height: 1.6; color: var(--c-gray-500);
   text-align: center;
 }
-.landing-attribution strong { color: #555; font-weight: 600; }
+.landing-attribution strong { color: var(--c-gray-500); font-weight: 600; }
 
 /* /settings/notifications */
 .settings-page {
@@ -1764,97 +1764,97 @@
   padding: 24px 32px 64px;
 }
 .settings-header h1 {
-  margin: 0 0 6px; font-size: 24px; font-weight: 700; letter-spacing: -0.01em;
+  margin: 0 0 6px; font-size: var(--text-2xl); font-weight: 700; letter-spacing: -0.01em;
 }
 .settings-sub {
-  color: #6b7280; font-size: 13px; margin: 0 0 24px;
+  color: var(--c-gray-500); font-size: var(--text-base); margin: 0 0 24px;
   line-height: 1.5;
 }
 .settings-section {
-  border: 1px solid #e5e7eb; border-radius: 8px;
-  padding: 20px 24px; margin-bottom: 16px; background: #fff;
+  border: 1px solid var(--c-gray-200); border-radius: var(--radius-lg);
+  padding: 20px 24px; margin-bottom: 16px; background: var(--c-white);
 }
 .settings-section h2 {
-  margin: 0 0 4px; font-size: 15px; font-weight: 600;
+  margin: 0 0 4px; font-size: var(--text-lg); font-weight: 600;
 }
 .settings-section-body { display: flex; flex-direction: column; gap: 12px; }
 .settings-row { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; }
 .quiet-hours-row label {
   display: flex; flex-direction: column; gap: 4px;
-  font-size: 12px; color: #6b7280;
+  font-size: var(--text-sm); color: var(--c-gray-500);
 }
 .quiet-hours-row input, .quiet-hours-row select {
-  border: 1px solid #d1d5db; border-radius: 6px;
-  padding: 6px 10px; font-size: 13px;
-  background: white; color: #111;
+  border: 1px solid var(--c-gray-300); border-radius: var(--radius-md);
+  padding: 6px 10px; font-size: var(--text-base);
+  background: white; color: var(--c-gray-900);
 }
-.settings-note { font-size: 12px; color: #6b7280; margin: 0; }
-.settings-note.warning { color: #b91c1c; }
+.settings-note { font-size: var(--text-sm); color: var(--c-gray-500); margin: 0; }
+.settings-note.warning { color: var(--c-danger-fg-strong); }
 
 .toggle-row {
   display: flex; align-items: flex-start; gap: 12px;
   cursor: pointer; padding: 10px 0;
-  border-top: 1px solid #f3f4f6;
+  border-top: 1px solid var(--c-gray-100);
 }
 .toggle-row:first-child { border-top: none; padding-top: 0; }
 .toggle-row.disabled { cursor: not-allowed; opacity: 0.6; }
 .toggle-row input[type=checkbox] { margin-top: 3px; }
 .toggle-text { display: flex; flex-direction: column; gap: 2px; }
-.toggle-label { font-size: 14px; font-weight: 500; color: #111; }
-.toggle-desc { font-size: 12px; color: #6b7280; line-height: 1.5; }
+.toggle-label { font-size: var(--text-md); font-weight: 500; color: var(--c-gray-900); }
+.toggle-desc { font-size: var(--text-sm); color: var(--c-gray-500); line-height: 1.5; }
 
 .btn-primary {
-  background: #111; color: #fff; border: none;
-  padding: 7px 14px; border-radius: 6px; font-size: 13px; cursor: pointer;
+  background: var(--c-gray-900); color: var(--c-white); border: none;
+  padding: 7px 14px; border-radius: var(--radius-md); font-size: var(--text-base); cursor: pointer;
 }
-.btn-primary:hover { background: #333; }
-.btn-primary:disabled { background: #9ca3af; cursor: not-allowed; }
+.btn-primary:hover { background: var(--c-gray-700); }
+.btn-primary:disabled { background: var(--c-gray-400); cursor: not-allowed; }
 .btn-link-muted {
   background: none; border: none; cursor: pointer;
-  color: #6b7280; font-size: 12px; padding: 4px 6px;
+  color: var(--c-gray-500); font-size: var(--text-sm); padding: 4px 6px;
 }
-.btn-link-muted:hover { color: #111; text-decoration: underline; }
+.btn-link-muted:hover { color: var(--c-gray-900); text-decoration: underline; }
 
 .settings-table, .admin-table {
   width: 100%; border-collapse: collapse;
-  font-size: 13px;
+  font-size: var(--text-base);
 }
 .settings-table th, .admin-table th {
   text-align: left; padding: 6px 8px;
-  font-size: 11px; text-transform: uppercase;
-  color: #6b7280; letter-spacing: 0.05em; font-weight: 600;
-  border-bottom: 1px solid #e5e7eb;
+  font-size: var(--text-xs); text-transform: uppercase;
+  color: var(--c-gray-500); letter-spacing: 0.05em; font-weight: 600;
+  border-bottom: 1px solid var(--c-gray-200);
 }
 .settings-table td, .admin-table td {
-  padding: 8px 8px; border-bottom: 1px solid #f3f4f6;
+  padding: 8px 8px; border-bottom: 1px solid var(--c-gray-100);
 }
-.settings-table select { font-size: 13px; padding: 3px 6px; }
+.settings-table select { font-size: var(--text-base); padding: 3px 6px; }
 .set-by {
-  font-size: 10px; text-transform: uppercase; letter-spacing: 0.05em;
-  padding: 2px 6px; border-radius: 4px; font-weight: 600;
+  font-size: var(--text-2xs); text-transform: uppercase; letter-spacing: 0.05em;
+  padding: 2px 6px; border-radius: var(--radius-sm); font-weight: 600;
 }
-.set-by-auto { background: #f3f4f6; color: #6b7280; }
+.set-by-auto { background: var(--c-gray-100); color: var(--c-gray-500); }
 .set-by-explicit { background: #dbeafe; color: #1e40af; }
 
 .mutes-list { list-style: none; padding: 0; margin: 8px 0 0; }
 .mutes-row {
   display: flex; align-items: center; gap: 10px;
-  padding: 6px 8px; border-bottom: 1px solid #f3f4f6;
-  font-size: 13px;
+  padding: 6px 8px; border-bottom: 1px solid var(--c-gray-100);
+  font-size: var(--text-base);
 }
-.mute-handle { font-weight: 500; color: #111; }
-.mute-when { font-size: 11px; margin-left: auto; }
+.mute-handle { font-weight: 500; color: var(--c-gray-900); }
+.mute-when { font-size: var(--text-xs); margin-left: auto; }
 
 .mute-typeahead { position: relative; }
 .mute-typeahead input {
   width: 100%; box-sizing: border-box;
-  border: 1px solid #d1d5db; border-radius: 6px;
-  padding: 7px 10px; font-size: 13px; outline: none;
+  border: 1px solid var(--c-gray-300); border-radius: var(--radius-md);
+  padding: 7px 10px; font-size: var(--text-base); outline: none;
 }
-.mute-typeahead input:focus { border-color: #111; }
+.mute-typeahead input:focus { border-color: var(--c-gray-900); }
 .mute-typeahead-results {
   position: absolute; top: 100%; left: 0; right: 0;
-  background: white; border: 1px solid #d1d5db; border-radius: 6px;
+  background: white; border: 1px solid var(--c-gray-300); border-radius: var(--radius-md);
   box-shadow: 0 4px 12px rgba(0,0,0,0.08);
   margin-top: 4px; padding: 4px 0; z-index: 10;
   list-style: none;
@@ -1863,9 +1863,9 @@
   display: flex; gap: 10px; align-items: center;
   width: 100%; padding: 6px 10px;
   background: none; border: none; text-align: left; cursor: pointer;
-  font-size: 13px;
+  font-size: var(--text-base);
 }
-.mute-typeahead-results button:hover { background: #f9fafb; }
+.mute-typeahead-results button:hover { background: var(--c-gray-50); }
 
 /* /admin */
 .admin-page {
@@ -1874,11 +1874,11 @@
 }
 .admin-rail {
   width: 220px; flex-shrink: 0;
-  background: #f9fafb; border-right: 1px solid #e5e7eb;
+  background: var(--c-gray-50); border-right: 1px solid var(--c-gray-200);
   padding: 24px 16px;
 }
 .admin-rail h2 {
-  font-size: 13px; color: #6b7280;
+  font-size: var(--text-base); color: var(--c-gray-500);
   text-transform: uppercase; letter-spacing: 0.08em;
   margin: 0 0 12px;
 }
@@ -1886,13 +1886,13 @@
 .admin-rail li { margin-bottom: 2px; }
 .admin-rail-link {
   display: block; padding: 6px 10px;
-  font-size: 13px; color: #374151; text-decoration: none;
-  border-radius: 4px;
+  font-size: var(--text-base); color: var(--c-gray-700); text-decoration: none;
+  border-radius: var(--radius-sm);
 }
-.admin-rail-link:hover { background: #f3f4f6; }
-.admin-rail-link.active { background: #111; color: #fff; }
+.admin-rail-link:hover { background: var(--c-gray-100); }
+.admin-rail-link.active { background: var(--c-gray-900); color: var(--c-white); }
 .admin-rail-note {
-  font-size: 11px; color: #6b7280; line-height: 1.5;
+  font-size: var(--text-xs); color: var(--c-gray-500); line-height: 1.5;
 }
 .admin-content {
   flex: 1; min-width: 0;
@@ -1900,12 +1900,12 @@
   overflow: auto;
 }
 .admin-tab-header h2 {
-  margin: 0 0 4px; font-size: 18px; font-weight: 700;
+  margin: 0 0 4px; font-size: var(--text-xl); font-weight: 700;
 }
-.admin-tab-header p { margin: 0 0 24px; font-size: 13px; }
+.admin-tab-header p { margin: 0 0 24px; font-size: var(--text-base); }
 .admin-section-h {
-  font-size: 13px; text-transform: uppercase;
-  letter-spacing: 0.05em; color: #6b7280;
+  font-size: var(--text-base); text-transform: uppercase;
+  letter-spacing: 0.05em; color: var(--c-gray-500);
   margin: 24px 0 8px;
 }
 
@@ -1913,12 +1913,12 @@
   display: flex; gap: 8px; margin-bottom: 18px; flex-wrap: wrap;
 }
 .audit-filters input, .audit-filters select {
-  border: 1px solid #d1d5db; border-radius: 6px;
-  padding: 5px 9px; font-size: 13px; background: white;
+  border: 1px solid var(--c-gray-300); border-radius: var(--radius-md);
+  padding: 5px 9px; font-size: var(--text-base); background: white;
 }
 .audit-table code {
-  font-size: 11px; background: #f3f4f6;
-  padding: 1px 5px; border-radius: 3px;
+  font-size: var(--text-xs); background: var(--c-gray-100);
+  padding: 1px 5px; border-radius: var(--radius-sm);
 }
 
 .allowlist-add {
@@ -1926,27 +1926,27 @@
   align-items: center;
 }
 .allowlist-add input[type="email"] {
-  border: 1px solid #d1d5db; border-radius: 6px;
-  padding: 6px 10px; font-size: 13px; min-width: 240px;
+  border: 1px solid var(--c-gray-300); border-radius: var(--radius-md);
+  padding: 6px 10px; font-size: var(--text-base); min-width: 240px;
 }
 .allowlist-add input[type="text"] {
-  border: 1px solid #d1d5db; border-radius: 6px;
-  padding: 6px 10px; font-size: 13px; flex: 1; min-width: 200px;
+  border: 1px solid var(--c-gray-300); border-radius: var(--radius-md);
+  padding: 6px 10px; font-size: var(--text-base); flex: 1; min-width: 200px;
 }
 .allowlist-add .btn-primary {
-  background: #1a1a1a; color: #fff;
-  border: none; border-radius: 6px;
-  padding: 6px 14px; font-size: 13px; font-weight: 600;
+  background: var(--c-ink); color: var(--c-white);
+  border: none; border-radius: var(--radius-md);
+  padding: 6px 14px; font-size: var(--text-base); font-weight: 600;
   cursor: pointer;
 }
-.allowlist-add .btn-primary:hover:not(:disabled) { background: #333; }
+.allowlist-add .btn-primary:hover:not(:disabled) { background: var(--c-gray-700); }
 .allowlist-add .btn-primary:disabled { opacity: 0.5; cursor: not-allowed; }
 
 .user-cell { display: flex; flex-direction: column; gap: 1px; }
-.user-handle { font-weight: 500; color: #111; }
+.user-handle { font-weight: 500; color: var(--c-gray-900); }
 .mute-toggle {
   display: inline-flex; align-items: center; gap: 6px;
-  font-size: 13px; cursor: pointer;
+  font-size: var(--text-base); cursor: pointer;
 }
 
 /* v0.9.0 — admin user-management surface (roadmap item #7). */
@@ -1955,53 +1955,53 @@
 }
 .admin-chip {
   display: inline-flex; align-items: center; gap: 6px;
-  background: #fff; border: 1px solid #d1d5db; border-radius: 999px;
-  padding: 4px 12px; font-size: 12px; color: #374151; cursor: pointer;
+  background: var(--c-white); border: 1px solid var(--c-gray-300); border-radius: var(--radius-pill);
+  padding: 4px 12px; font-size: var(--text-sm); color: var(--c-gray-700); cursor: pointer;
 }
-.admin-chip:hover { background: #f9fafb; }
+.admin-chip:hover { background: var(--c-gray-50); }
 .admin-chip.active {
-  background: #111; color: #fff; border-color: #111;
+  background: var(--c-gray-900); color: var(--c-white); border-color: var(--c-gray-900);
 }
 .admin-chip-count {
-  font-size: 11px; opacity: 0.7;
+  font-size: var(--text-xs); opacity: 0.7;
 }
 .admin-users-table td { vertical-align: top; padding-top: 10px; padding-bottom: 10px; }
 .permission-cell { display: flex; flex-direction: column; gap: 4px; }
 .permission-actions { display: flex; gap: 6px; }
 .permission-badge {
   display: inline-block;
-  font-size: 11px; font-weight: 600;
-  padding: 2px 8px; border-radius: 999px;
+  font-size: var(--text-xs); font-weight: 600;
+  padding: 2px 8px; border-radius: var(--radius-pill);
   text-transform: uppercase; letter-spacing: 0.04em;
   width: max-content;
 }
 .permission-badge-pending {
-  background: #fef3c7; color: #92400e;
+  background: var(--c-warning-bg); color: var(--c-warning-fg);
 }
 .permission-badge-granted {
-  background: #dcfce7; color: #166534;
+  background: var(--c-success-bg); color: var(--c-success-fg);
 }
 .permission-badge-revoked {
-  background: #fee2e2; color: #991b1b;
+  background: var(--c-danger-bg); color: var(--c-danger-fg);
 }
-.permission-decided { font-size: 11px; }
+.permission-decided { font-size: var(--text-xs); }
 .user-row-reason td {
-  background: #fffbeb; border-top: none !important;
+  background: var(--c-warning-bg-soft); border-top: none !important;
   padding: 0 16px 12px !important;
 }
 .user-reason-block {
   border-left: 3px solid #f59e0b;
-  padding: 8px 12px; font-size: 13px;
-  background: #fffbeb;
+  padding: 8px 12px; font-size: var(--text-base);
+  background: var(--c-warning-bg-soft);
 }
-.user-reason-block strong { display: block; margin-bottom: 4px; color: #92400e; }
-.user-reason-block p { margin: 0; white-space: pre-wrap; color: #374151; }
+.user-reason-block strong { display: block; margin-bottom: 4px; color: var(--c-warning-fg); }
+.user-reason-block p { margin: 0; white-space: pre-wrap; color: var(--c-gray-700); }
 .grad-queue { list-style: none; padding: 0; margin: 8px 0 24px; }
-.grad-queue li { padding: 8px 0; border-bottom: 1px solid #f3f4f6; }
-.grad-queue-link { color: #111; text-decoration: none; font-size: 14px; }
+.grad-queue li { padding: 8px 0; border-bottom: 1px solid var(--c-gray-100); }
+.grad-queue-link { color: var(--c-gray-900); text-decoration: none; font-size: var(--text-md); }
 .grad-queue-link:hover strong { text-decoration: underline; }
-.muted { color: #6b7280; }
-.error { color: #b91c1c; }
+.muted { color: var(--c-gray-500); }
+.error { color: var(--c-danger-fg-strong); }
 
 /* v0.5.0 — PR-less per-RFC discussion panel (RFCDiscussionPanel.jsx).
    Visual neighbor of .chat-panel but distinct: discussion lives on the
@@ -2014,25 +2014,25 @@
 }
 .discussion-header {
   padding: 10px 14px;
-  border-bottom: 1px solid #f0f0ee;
-  background: #fafafa;
+  border-bottom: 1px solid var(--c-gray-150);
+  background: var(--c-gray-50);
   display: flex; flex-direction: column; gap: 4px;
 }
-.discussion-header-title { font-size: 12px; color: #555; font-weight: 600; }
-.discussion-header-meta { font-size: 11px; color: #888; }
+.discussion-header-title { font-size: var(--text-sm); color: var(--c-gray-500); font-weight: 600; }
+.discussion-header-meta { font-size: var(--text-xs); color: var(--c-gray-500); }
 .discussion-thread-tabs {
   display: flex; gap: 4px; flex-wrap: wrap;
   padding: 6px 14px;
-  border-bottom: 1px solid #f0f0ee;
-  background: #fcfcfb;
+  border-bottom: 1px solid var(--c-gray-150);
+  background: var(--c-gray-150);
 }
 .discussion-thread-tab {
-  background: #fff; border: 1px solid #e5e5e0; cursor: pointer;
-  font-size: 11px; color: #555;
-  padding: 3px 8px; border-radius: 999px;
+  background: var(--c-white); border: 1px solid var(--c-gray-200); cursor: pointer;
+  font-size: var(--text-xs); color: var(--c-gray-500);
+  padding: 3px 8px; border-radius: var(--radius-pill);
 }
 .discussion-thread-tab.active {
-  background: #eef2ff; border-color: #5b5bd6; color: #3737a0;
+  background: #eef2ff; border-color: var(--c-accent); color: #3737a0;
 }
 .discussion-thread-tab.resolved { opacity: 0.6; }
 .discussion-messages {
@@ -2045,50 +2045,50 @@
   text-align: center; padding: 24px;
 }
 .discussion-empty p {
-  font-size: 13px; color: #999; line-height: 1.6; max-width: 280px;
+  font-size: var(--text-base); color: var(--c-gray-500); line-height: 1.6; max-width: 280px;
 }
 .discussion-error {
-  background: #fee; border: 1px solid #fcc; color: #b91c1c;
-  padding: 8px 10px; border-radius: 4px; font-size: 12px;
+  background: var(--c-danger-bg); border: 1px solid var(--c-danger-border); color: var(--c-danger-fg-strong);
+  padding: 8px 10px; border-radius: var(--radius-sm); font-size: var(--text-sm);
 }
 .discussion-message { display: flex; flex-direction: column; gap: 3px; }
 .discussion-message-meta {
-  display: flex; gap: 8px; font-size: 11px; color: #888;
+  display: flex; gap: 8px; font-size: var(--text-xs); color: var(--c-gray-500);
 }
-.discussion-message-author { color: #5b5bd6; font-weight: 500; }
+.discussion-message-author { color: var(--c-accent); font-weight: 500; }
 .discussion-message-quote {
-  font-size: 11px; color: #666; font-style: italic;
-  border-left: 2px solid #ddd; padding-left: 8px; margin-bottom: 2px;
+  font-size: var(--text-xs); color: var(--c-gray-500); font-style: italic;
+  border-left: 2px solid var(--c-gray-300); padding-left: 8px; margin-bottom: 2px;
 }
 .discussion-message-body {
-  font-size: 13px; color: #222; line-height: 1.5;
+  font-size: var(--text-base); color: var(--c-gray-800); line-height: 1.5;
   white-space: pre-wrap; word-wrap: break-word;
-  background: #f7f7f5; padding: 8px 10px; border-radius: 6px;
+  background: var(--c-gray-100); padding: 8px 10px; border-radius: var(--radius-md);
 }
 .discussion-message.system .discussion-system-bubble {
-  font-size: 12px; color: #888; font-style: italic;
+  font-size: var(--text-sm); color: var(--c-gray-500); font-style: italic;
   text-align: center; padding: 4px 0;
 }
 .discussion-composer {
-  border-top: 1px solid #f0f0ee;
+  border-top: 1px solid var(--c-gray-150);
   padding: 10px 14px;
-  background: #fafafa;
+  background: var(--c-gray-50);
   display: flex; flex-direction: column; gap: 6px;
 }
 .discussion-composer-textarea {
   width: 100%; resize: vertical; min-height: 60px;
-  font-family: inherit; font-size: 13px;
-  border: 1px solid #ddd; border-radius: 4px;
+  font-family: inherit; font-size: var(--text-base);
+  border: 1px solid var(--c-gray-300); border-radius: var(--radius-sm);
   padding: 6px 8px;
 }
 .discussion-composer-textarea:focus {
-  outline: none; border-color: #5b5bd6;
+  outline: none; border-color: var(--c-accent);
 }
 .discussion-composer-actions {
   display: flex; gap: 8px; align-items: center; justify-content: flex-end;
 }
 .discussion-readonly {
-  font-size: 12px; color: #666; padding: 4px 0;
+  font-size: var(--text-sm); color: var(--c-gray-500); padding: 4px 0;
 }
 
 /* §14.5 — cookie consent banner (v0.13.0) */
@@ -2096,8 +2096,8 @@
   position: fixed;
   left: 0; right: 0; bottom: 0;
   z-index: 1000;
-  background: #fff;
-  border-top: 1px solid #d1d5db;
+  background: var(--c-white);
+  border-top: 1px solid var(--c-gray-300);
   box-shadow: 0 -8px 24px rgba(0, 0, 0, 0.08);
   padding: 20px 24px;
 }
@@ -2106,10 +2106,10 @@
   display: flex; flex-direction: column; gap: 12px;
 }
 .cookie-consent-title {
-  margin: 0; font-size: 16px; font-weight: 700; color: #111;
+  margin: 0; font-size: var(--text-lg); font-weight: 700; color: var(--c-gray-900);
 }
 .cookie-consent-intro {
-  margin: 0; font-size: 13px; color: #4b5563; line-height: 1.5;
+  margin: 0; font-size: var(--text-base); color: var(--c-gray-600); line-height: 1.5;
 }
 .cookie-consent-choices {
   border: none; padding: 0; margin: 0;
@@ -2117,29 +2117,29 @@
 }
 .cookie-consent-choice {
   display: flex; gap: 10px; align-items: flex-start;
-  padding: 10px 12px; border-radius: 6px;
-  border: 1px solid #e5e7eb;
+  padding: 10px 12px; border-radius: var(--radius-md);
+  border: 1px solid var(--c-gray-200);
   cursor: pointer;
 }
 .cookie-consent-choice.is-selected {
-  border-color: #111; background: #f9fafb;
+  border-color: var(--c-gray-900); background: var(--c-gray-50);
 }
 .cookie-consent-choice input[type=radio] { margin-top: 3px; }
 .cookie-consent-choice-text {
   display: flex; flex-direction: column; gap: 2px;
 }
 .cookie-consent-choice-label {
-  font-size: 13px; font-weight: 600; color: #111;
+  font-size: var(--text-base); font-weight: 600; color: var(--c-gray-900);
 }
 .cookie-consent-choice-desc {
-  font-size: 12px; color: #6b7280; line-height: 1.5;
+  font-size: var(--text-sm); color: var(--c-gray-500); line-height: 1.5;
 }
 .cookie-consent-links {
-  margin: 0; font-size: 12px; color: #6b7280;
+  margin: 0; font-size: var(--text-sm); color: var(--c-gray-500);
 }
-.cookie-consent-links a { color: #111; text-decoration: underline; }
+.cookie-consent-links a { color: var(--c-gray-900); text-decoration: underline; }
 .cookie-consent-error {
-  margin: 0; font-size: 12px; color: #b91c1c;
+  margin: 0; font-size: var(--text-sm); color: var(--c-danger-fg-strong);
 }
 .cookie-consent-actions {
   display: flex; gap: 8px; justify-content: flex-end;
@@ -2157,41 +2157,41 @@
 }
 .policy-header {
   display: flex; align-items: center; gap: 12px;
-  padding: 20px 0; border-bottom: 1px solid #f3f4f6;
+  padding: 20px 0; border-bottom: 1px solid var(--c-gray-100);
   margin-bottom: 24px;
 }
 .policy-back {
   background: none; border: none; cursor: pointer;
-  color: #6b7280; font-size: 13px; padding: 4px 8px;
+  color: var(--c-gray-500); font-size: var(--text-base); padding: 4px 8px;
 }
-.policy-back:hover { color: #111; }
-.policy-title { font-size: 13px; font-weight: 600; color: #6b7280; }
-.policy-body { line-height: 1.7; color: #111; }
-.policy-body h1 { font-size: 26px; margin: 0 0 6px; font-weight: 700; }
-.policy-body .policy-subtitle { color: #6b7280; margin: 0 0 24px; font-size: 14px; }
-.policy-body h2 { font-size: 16px; margin: 28px 0 8px; font-weight: 600; }
+.policy-back:hover { color: var(--c-gray-900); }
+.policy-title { font-size: var(--text-base); font-weight: 600; color: var(--c-gray-500); }
+.policy-body { line-height: 1.7; color: var(--c-gray-900); }
+.policy-body h1 { font-size: var(--text-3xl); margin: 0 0 6px; font-weight: 700; }
+.policy-body .policy-subtitle { color: var(--c-gray-500); margin: 0 0 24px; font-size: var(--text-md); }
+.policy-body h2 { font-size: var(--text-lg); margin: 28px 0 8px; font-weight: 600; }
 .policy-body p { margin: 0 0 12px; }
 .policy-body ul { margin: 0 0 16px; padding-left: 22px; }
 .policy-body li { margin-bottom: 6px; }
 .policy-body code {
-  background: #f3f4f6; padding: 1px 5px; border-radius: 3px;
-  font-family: ui-monospace, monospace; font-size: 12px;
+  background: var(--c-gray-100); padding: 1px 5px; border-radius: var(--radius-sm);
+  font-family: ui-monospace, monospace; font-size: var(--text-sm);
 }
 .policy-body .policy-footnote {
-  margin-top: 24px; font-size: 12px; color: #6b7280;
+  margin-top: 24px; font-size: var(--text-sm); color: var(--c-gray-500);
 }
 .policy-table {
   width: 100%; border-collapse: collapse;
-  font-size: 13px; margin: 8px 0 16px;
+  font-size: var(--text-base); margin: 8px 0 16px;
 }
 .policy-table th, .policy-table td {
   text-align: left; padding: 8px 10px;
-  border-bottom: 1px solid #f3f4f6;
+  border-bottom: 1px solid var(--c-gray-100);
   vertical-align: top;
 }
 .policy-table th {
-  font-size: 11px; text-transform: uppercase;
-  color: #6b7280; letter-spacing: 0.05em; font-weight: 600;
+  font-size: var(--text-xs); text-transform: uppercase;
+  color: var(--c-gray-500); letter-spacing: 0.05em; font-weight: 600;
 }
 
 /* ──────────────────────────────────────────────────────────────────
@@ -2217,31 +2217,31 @@
 .docs-header {
   display: flex; align-items: center; gap: 12px;
   padding: 12px 24px 12px 16px;
-  border-bottom: 1px solid #f0f0ee;
+  border-bottom: 1px solid var(--c-gray-150);
   flex-shrink: 0;
 }
 .docs-back, .docs-drawer-toggle {
   border: none; background: none; cursor: pointer;
-  color: #4b5563; font-size: 13px;
-  padding: 4px 8px; border-radius: 4px;
+  color: var(--c-gray-600); font-size: var(--text-base);
+  padding: 4px 8px; border-radius: var(--radius-sm);
 }
 .docs-back:hover, .docs-drawer-toggle:hover {
-  background: #f3f4f6; color: #111;
+  background: var(--c-gray-100); color: var(--c-gray-900);
 }
 .docs-drawer-toggle {
   display: none;
-  font-size: 18px;
+  font-size: var(--text-xl);
   line-height: 1;
 }
 .docs-title {
-  font-size: 13px; color: #6b7280;
+  font-size: var(--text-base); color: var(--c-gray-500);
   text-transform: uppercase; letter-spacing: 0.08em;
 }
 .docs-signin {
   margin-left: auto;
-  font-size: 13px; color: #4b5563; text-decoration: none;
+  font-size: var(--text-base); color: var(--c-gray-600); text-decoration: none;
 }
-.docs-signin:hover { color: #111; text-decoration: underline; }
+.docs-signin:hover { color: var(--c-gray-900); text-decoration: underline; }
 
 .docs-body {
   flex: 1; min-height: 0;
@@ -2252,18 +2252,18 @@
 .docs-nav {
   flex-shrink: 0;
   width: 260px;
-  border-right: 1px solid #f0f0ee;
+  border-right: 1px solid var(--c-gray-150);
   padding: 24px 20px;
   overflow-y: auto;
-  background: #fafaf9;
+  background: var(--c-gray-50);
 }
 
 .docs-nav-inner { display: flex; flex-direction: column; gap: 24px; }
 .docs-nav-section { display: flex; flex-direction: column; gap: 8px; }
 .docs-nav-section-label {
-  font-size: 11px; font-weight: 600;
+  font-size: var(--text-xs); font-weight: 600;
   text-transform: uppercase; letter-spacing: 0.08em;
-  color: #6b7280;
+  color: var(--c-gray-500);
 }
 .docs-nav-list {
   list-style: none; padding: 0; margin: 0;
@@ -2271,14 +2271,14 @@
 }
 .docs-nav-list a {
   display: block;
-  padding: 6px 10px; border-radius: 4px;
-  color: #1f2937; text-decoration: none;
-  font-size: 14px; line-height: 1.4;
+  padding: 6px 10px; border-radius: var(--radius-sm);
+  color: var(--c-gray-800); text-decoration: none;
+  font-size: var(--text-md); line-height: 1.4;
   word-break: break-word;
 }
-.docs-nav-list a:hover { background: #f0f0ee; }
+.docs-nav-list a:hover { background: var(--c-gray-150); }
 .docs-nav-list a.active {
-  background: #e7e5e4; color: #111; font-weight: 600;
+  background: var(--c-gray-200); color: var(--c-gray-900); font-weight: 600;
 }
 
 /* v0.20.0 — nested transcript rows under each session row. The parent
@@ -2288,23 +2288,23 @@
 .docs-nav-list--children {
   list-style: none; padding: 0; margin: 2px 0 8px 14px;
   display: flex; flex-direction: column; gap: 2px;
-  border-left: 1px solid #e5e7eb;
+  border-left: 1px solid var(--c-gray-200);
 }
 .docs-nav-list--children a {
   padding: 4px 10px;
-  font-size: 13px; color: #4b5563;
+  font-size: var(--text-base); color: var(--c-gray-600);
   font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
 }
 .docs-nav-list--children a.active {
-  background: #e7e5e4; color: #111; font-weight: 600;
+  background: var(--c-gray-200); color: var(--c-gray-900); font-weight: 600;
 }
 
 .docs-nav-skeleton .skeleton-row {
   display: block;
   height: 14px; margin: 8px 10px;
-  background: linear-gradient(90deg, #f0f0ee 25%, #e7e5e4 50%, #f0f0ee 75%);
+  background: linear-gradient(90deg, var(--c-gray-150) 25%, var(--c-gray-200) 50%, var(--c-gray-150) 75%);
   background-size: 200% 100%;
-  border-radius: 4px;
+  border-radius: var(--radius-sm);
   animation: docs-skeleton-shimmer 1.2s ease-in-out infinite;
 }
 @keyframes docs-skeleton-shimmer {
@@ -2314,17 +2314,17 @@
 
 .docs-nav-error {
   padding: 8px 10px;
-  font-size: 13px; color: #9a3412;
-  background: #fff7ed; border: 1px solid #fed7aa; border-radius: 4px;
+  font-size: var(--text-base); color: #9a3412;
+  background: var(--c-warning-bg-soft); border: 1px solid #fed7aa; border-radius: var(--radius-sm);
   display: flex; flex-direction: column; gap: 6px;
 }
 .docs-nav-error button {
   align-self: flex-start;
-  background: #fff; border: 1px solid #fed7aa;
-  color: #9a3412; font-size: 12px;
-  padding: 4px 8px; border-radius: 4px; cursor: pointer;
+  background: var(--c-white); border: 1px solid #fed7aa;
+  color: #9a3412; font-size: var(--text-sm);
+  padding: 4px 8px; border-radius: var(--radius-sm); cursor: pointer;
 }
-.docs-nav-error button:hover { background: #fff7ed; }
+.docs-nav-error button:hover { background: var(--c-warning-bg-soft); }
 
 .docs-content {
   flex: 1; min-width: 0;
@@ -2337,15 +2337,15 @@
   margin: 0 auto;
 }
 .docs-article-title {
-  font-size: 28px; font-weight: 700; margin: 0 0 24px;
+  font-size: var(--text-3xl); font-weight: 700; margin: 0 0 24px;
   letter-spacing: -0.01em;
-  color: #111;
+  color: var(--c-gray-900);
 }
-.docs-breadcrumbs { margin: 0 0 16px; font-size: 13px; }
+.docs-breadcrumbs { margin: 0 0 16px; font-size: var(--text-base); }
 .docs-breadcrumbs a {
-  color: #4b5563; text-decoration: none;
+  color: var(--c-gray-600); text-decoration: none;
 }
-.docs-breadcrumbs a:hover { color: #111; text-decoration: underline; }
+.docs-breadcrumbs a:hover { color: var(--c-gray-900); text-decoration: underline; }
 
 .docs-session-files {
   list-style: none; padding: 0; margin: 0;
@@ -2353,23 +2353,23 @@
 }
 .docs-session-files a {
   display: block;
-  padding: 10px 14px; border-radius: 6px;
-  background: #fafaf9; border: 1px solid #f0f0ee;
-  color: #1f2937; text-decoration: none;
+  padding: 10px 14px; border-radius: var(--radius-md);
+  background: var(--c-gray-50); border: 1px solid var(--c-gray-150);
+  color: var(--c-gray-800); text-decoration: none;
   font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
-  font-size: 13px; word-break: break-all;
+  font-size: var(--text-base); word-break: break-all;
 }
 .docs-session-files a:hover {
-  background: #f3f4f6; border-color: #e5e7eb;
+  background: var(--c-gray-100); border-color: var(--c-gray-200);
 }
 
 /* v0.20.0 — session-overview body. Replaces the per-session body
    transcript-link list; transcripts are now picked from the left
    nav. The body just states the count + the nav hint. */
 .docs-session-overview {
-  padding: 16px; border-radius: 6px;
-  background: #fafaf9; border: 1px solid #f0f0ee;
-  font-size: 14px; line-height: 1.6; color: #4b5563;
+  padding: 16px; border-radius: var(--radius-md);
+  background: var(--c-gray-50); border: 1px solid var(--c-gray-150);
+  font-size: var(--text-md); line-height: 1.6; color: var(--c-gray-600);
 }
 
 /* v0.20.0 — spec article header (title + "View source" link sit on
@@ -2381,26 +2381,26 @@
 }
 .docs-article-header .docs-article-title { margin: 0; }
 .docs-source-link {
-  font-size: 13px; color: #4b5563; text-decoration: none;
-  padding: 4px 10px; border-radius: 4px; border: 1px solid #e5e7eb;
-  background: #fafaf9;
+  font-size: var(--text-base); color: var(--c-gray-600); text-decoration: none;
+  padding: 4px 10px; border-radius: var(--radius-sm); border: 1px solid var(--c-gray-200);
+  background: var(--c-gray-50);
   white-space: nowrap;
 }
-.docs-source-link:hover { background: #f3f4f6; color: #111; }
+.docs-source-link:hover { background: var(--c-gray-100); color: var(--c-gray-900); }
 
 .docs-empty, .docs-error {
-  padding: 16px; border-radius: 6px;
-  background: #fafaf9; border: 1px solid #f0f0ee;
-  font-size: 14px; line-height: 1.6; color: #4b5563;
+  padding: 16px; border-radius: var(--radius-md);
+  background: var(--c-gray-50); border: 1px solid var(--c-gray-150);
+  font-size: var(--text-md); line-height: 1.6; color: var(--c-gray-600);
 }
-.docs-error { background: #fef2f2; border-color: #fecaca; color: #991b1b; }
+.docs-error { background: var(--c-danger-bg); border-color: var(--c-danger-border); color: var(--c-danger-fg); }
 .docs-error button {
   margin-top: 10px;
-  background: #fff; border: 1px solid #fecaca;
-  color: #991b1b; font-size: 13px;
-  padding: 6px 12px; border-radius: 4px; cursor: pointer;
+  background: var(--c-white); border: 1px solid var(--c-danger-border);
+  color: var(--c-danger-fg); font-size: var(--text-base);
+  padding: 6px 12px; border-radius: var(--radius-sm); cursor: pointer;
 }
-.docs-error button:hover { background: #fef2f2; }
+.docs-error button:hover { background: var(--c-danger-bg); }
 
 .docs-drawer-scrim {
   display: none;
@@ -2432,3 +2432,58 @@
   }
   .docs-content { padding: 16px 18px 64px; }
 }
+
+/* ──────────────────────────────────────────────────────────────────
+   v0.21.0 / roadmap item #31 — interaction polish layer.
+
+   Appended (not interleaved) so it touches no existing selector's
+   declarations: it only ADDS a coherent transition vocabulary to the
+   interactive surfaces that already carry hover/active/focus states,
+   and a single consistent keyboard-focus ring. Colors/durations come
+   from the token module, so reduced-motion collapses transitions to
+   0ms automatically. Nothing here changes resting-state appearance.
+   ────────────────────────────────────────────────────────────────── */
+
+/* Subtle transitions on the interactive surfaces that already react to
+   hover. Limited to color/background/border/box-shadow/opacity so layout
+   never animates. */
+button,
+a,
+input,
+textarea,
+select,
+.chip,
+.model-pill,
+.catalog-row,
+.pending-row,
+.branch-dropdown-trigger,
+.branch-dropdown-item,
+.selection-tooltip-tab,
+.admin-chip,
+.admin-rail-link,
+.docs-nav-list a,
+.inbox-row-link,
+.toggle-row {
+  transition:
+    color var(--motion-base) var(--ease-out),
+    background-color var(--motion-base) var(--ease-out),
+    border-color var(--motion-base) var(--ease-out),
+    box-shadow var(--motion-base) var(--ease-out),
+    opacity var(--motion-base) var(--ease-out);
+}
+
+/* One consistent keyboard-focus ring across all interactive controls.
+   :focus-visible only — it never shows on mouse/touch, so it does not
+   alter the existing pointer-driven hover look. The few inputs that set
+   their own border-color on :focus keep that; this just guarantees a
+   visible ring for keyboard users on every control. */
+button:focus-visible,
+a:focus-visible,
+input:focus-visible,
+textarea:focus-visible,
+select:focus-visible,
+[role="button"]:focus-visible {
+  outline: 2px solid var(--color-focus-ring);
+  outline-offset: 2px;
+  border-radius: var(--radius-sm);
+}
diff --git a/frontend/src/index.css b/frontend/src/index.css
index 577dc32..f1af352 100644
--- a/frontend/src/index.css
+++ b/frontend/src/index.css
@@ -1,8 +1,7 @@
 :root {
-  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue",
-    Arial, sans-serif;
-  color: #1a1a1a;
-  background: #fafaf8;
+  font-family: var(--font-sans);
+  color: var(--color-text);
+  background: var(--color-bg);
   -webkit-font-smoothing: antialiased;
   -moz-osx-font-smoothing: grayscale;
 }