/* Adapted from the prototype's App.css per §18, narrowed to slice-1 surfaces. */

.boot {
  display: flex; align-items: center; justify-content: center;
  height: 100vh; color: #888; font-size: 14px;
}

.app { height: 100vh; display: flex; flex-direction: column; }

.app-header {
  height: 48px; flex-shrink: 0;
  background: #1a1a1a; color: #fff;
  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; }
.user-role-badge {
  font-size: 10px; font-weight: 700;
  text-transform: uppercase; letter-spacing: 0.06em;
  padding: 2px 6px; border-radius: 4px;
  background: rgba(255,255,255,0.15);
}
.role-owner { background: #b45309; }
.role-admin { background: #4338ca; }

.btn-link {
  color: #fff; text-decoration: none;
  background: rgba(255,255,255,0.15);
  border-radius: 6px; padding: 4px 10px;
  font-size: 13px;
}
.btn-link:hover { background: rgba(255,255,255,0.25); }

.app-body { flex: 1; display: flex; overflow: hidden; }

/* --- Catalog (left pane, §7) --- */

.catalog {
  width: 320px; flex-shrink: 0;
  background: #fff; border-right: 1px solid #e5e5e5;
  display: flex; flex-direction: column;
  overflow: hidden;
}

.catalog-search {
  padding: 12px 14px;
  border-bottom: 1px solid #f0f0ee;
}
.catalog-search input {
  width: 100%; border: 1px solid #e5e5e5; border-radius: 6px;
  padding: 6px 10px; font-size: 13px; outline: none;
}
.catalog-search input:focus { border-color: #1a1a1a; }

.catalog-controls {
  display: flex; align-items: center; gap: 8px;
  padding: 8px 14px;
  border-bottom: 1px solid #f0f0ee;
  font-size: 12px; color: #555;
}
.catalog-controls select {
  border: 1px solid #e5e5e5; border-radius: 4px;
  font-size: 12px; padding: 2px 4px;
}

.catalog-chips {
  display: flex; flex-wrap: wrap; gap: 4px;
  padding: 6px 14px 10px;
  border-bottom: 1px solid #f0f0ee;
}
.chip {
  font-size: 11px;
  background: #f0f0ee; color: #444;
  border: 1px solid transparent; border-radius: 999px;
  padding: 2px 9px; cursor: pointer;
}
.chip.active { background: #1a1a1a; color: #fff; border-color: #1a1a1a; }

.catalog-list { flex: 1; overflow-y: auto; padding: 4px 0; }

.catalog-row {
  display: flex; flex-direction: column;
  padding: 8px 14px;
  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 .row-top { display: flex; align-items: center; gap: 6px; }
.row-id {
  font-size: 10px; font-weight: 700;
  color: #888; 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; }

.catalog-pending {
  border-top: 1px solid #f0f0ee;
  flex-shrink: 0;
  background: #fafaf8;
}
.pending-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 8px 14px;
  font-size: 11px; font-weight: 700;
  text-transform: uppercase; letter-spacing: 0.06em;
  color: #888;
  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;
}
.pending-list { padding: 2px 0 8px; }
.pending-row {
  display: block;
  padding: 6px 14px;
  font-size: 13px; color: #444; 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 .pending-by {
  font-size: 11px; color: #999; margin-top: 1px;
}

.catalog-footer {
  border-top: 1px solid #e5e5e5;
  padding: 10px 14px;
  flex-shrink: 0;
  background: #fff;
}
.btn-propose {
  width: 100%;
  background: #1a1a1a; color: #fff;
  border: none; border-radius: 6px;
  padding: 8px 12px;
  font-size: 13px; font-weight: 600;
  cursor: pointer;
}
.btn-propose:hover { background: #333; }
.btn-propose:disabled { opacity: 0.5; cursor: default; }

/* --- Main pane --- */

.main-pane {
  flex: 1; overflow-y: auto;
  padding: 32px 48px;
}

.welcome { max-width: 640px; }
.welcome h1 { font-size: 22px; font-weight: 600; margin: 0 0 16px; }
.welcome p { line-height: 1.7; color: #444; }

/* --- 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;
  text-transform: uppercase; letter-spacing: 0.06em;
  color: #b45309;
  padding: 6px 10px;
  background: #fffbeb; border: 1px solid #fde68a;
  border-radius: 6px;
  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.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-meta .entry-tag {
  display: inline-block;
  background: #f0f0ee; color: #555;
  padding: 1px 8px; border-radius: 999px;
  margin-right: 4px;
}
.entry-body {
  font-size: 15px; line-height: 1.75; color: #1a1a1a;
}
.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 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-actions {
  display: flex; gap: 8px; margin: 16px 0 24px;
  padding-bottom: 24px;
  border-bottom: 1px solid #e5e5e5;
}
.btn-primary {
  background: #166534; color: #fff;
  border: none; border-radius: 6px;
  padding: 7px 14px;
  font-size: 13px; 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;
  padding: 7px 14px;
  font-size: 13px; font-weight: 600;
  cursor: pointer;
}
.btn-secondary:hover { background: #f7f7f5; }
.btn-danger {
  background: #fff; color: #991b1b;
  border: 1px solid #fecaca; border-radius: 6px;
  padding: 7px 14px;
  font-size: 13px; font-weight: 600;
  cursor: pointer;
}
.btn-danger:hover { background: #fef2f2; }

/* --- Modals --- */

.modal-overlay {
  position: fixed; inset: 0;
  background: rgba(20, 20, 20, 0.4);
  display: flex; align-items: center; justify-content: center;
  z-index: 100;
}
.modal {
  background: #fff;
  border-radius: 10px;
  box-shadow: 0 12px 40px rgba(0,0,0,0.15);
  width: 560px; max-width: calc(100vw - 40px);
  max-height: calc(100vh - 80px);
  display: flex; flex-direction: column;
}
.modal-header {
  padding: 18px 20px;
  border-bottom: 1px solid #f0f0ee;
  display: flex; align-items: center; justify-content: space-between;
}
.modal-header h2 { margin: 0; font-size: 17px; font-weight: 600; }
.modal-close {
  background: none; border: none; font-size: 22px; cursor: pointer;
  color: #999; line-height: 1; padding: 0;
}
.modal-body {
  padding: 20px;
  overflow-y: auto;
  flex: 1;
}
.modal-body label {
  display: block;
  font-size: 12px; font-weight: 600;
  color: #555;
  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;
  padding: 8px 10px;
  font-size: 14px; font-family: inherit;
  outline: none; margin-bottom: 14px;
}
.modal-body input:focus, .modal-body textarea:focus { border-color: #1a1a1a; }
.modal-body textarea { resize: vertical; min-height: 100px; }
.field-help {
  font-size: 12px; color: #999;
  margin-top: -10px; margin-bottom: 14px;
}
.field-error {
  font-size: 12px; color: #991b1b;
  margin-top: -10px; margin-bottom: 14px;
}
.modal-actions {
  border-top: 1px solid #f0f0ee;
  padding: 14px 20px;
  display: flex; justify-content: flex-end; gap: 10px;
}

/* --- Landing page (pre-login, §14.1) --- */

.landing {
  height: 100vh;
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  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 .pitch {
  max-width: 540px;
  line-height: 1.7; color: #333;
  font-size: 15px;
  margin: 0 0 28px;
}
.landing .btn-signin {
  background: #1a1a1a; color: #fff;
  border: none; border-radius: 8px;
  padding: 10px 20px;
  font-size: 14px; font-weight: 600;
  text-decoration: none;
}
.landing .btn-signin:hover { background: #333; }
.landing .secondary-link {
  margin-top: 14px;
  font-size: 13px;
  color: #666; text-decoration: none;
}
.landing .secondary-link:hover { color: #1a1a1a; text-decoration: underline; }

/* ── §8 RFC view: three-column shape ─────────────────────────────────── */

.main-pane {
  /* Override the §9.x padded read-view; the §8 surface manages its own
     internal layout and needs to fill the pane edge-to-edge. */
  padding: 0;
  overflow: hidden;
  display: flex;
}

.rfc-view {
  flex: 1; min-width: 0;
  display: flex; flex-direction: column;
  overflow: hidden;
}

.rfc-breadcrumb {
  display: flex; align-items: center; gap: 8px;
  padding: 10px 16px;
  border-bottom: 1px solid #e5e5e5;
  background: #fafafa;
  font-size: 13px; color: #555;
  flex-shrink: 0;
}
.breadcrumb-label {
  font-size: 11px; font-weight: 700; text-transform: uppercase;
  letter-spacing: 0.05em; color: #888;
}
.breadcrumb-sep { color: #ccc; }
.breadcrumb-meta { color: #999; font-size: 12px; }
.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;
  cursor: pointer;
}
.btn-mode-toggle.discuss { background: #fff; color: #444; }
.btn-mode-toggle.contribute { background: #1a1a1a; color: #fff; border-color: #1a1a1a; }

.btn-start-contribution-header {
  background: #1a1a1a; color: #fff;
  border: none; border-radius: 6px;
  padding: 5px 12px; font-size: 12px; 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;
  cursor: pointer;
}
.branch-dropdown-trigger:hover { border-color: #e5e5e5; }
.branch-dropdown-menu {
  position: absolute; top: 100%; left: 0; margin-top: 4px;
  background: #fff; border: 1px solid #e5e5e5; border-radius: 8px;
  box-shadow: 0 4px 20px rgba(0,0,0,0.08);
  z-index: 50; min-width: 240px; padding: 4px;
}
.branch-dropdown-item {
  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;
}
.branch-dropdown-item:hover { background: #f5f5f5; }
.branch-dropdown-item.active { background: #f0f0ee; font-weight: 600; }
.branch-name { flex: 1; }
.branch-creator { font-size: 11px; color: #999; }
.branch-private-icon { font-size: 10px; }

.rfc-body { flex: 1; display: flex; overflow: hidden; }

/* ── Editor area ─────────────────────────────────────────────────────── */

.editor-area {
  flex: 1; min-width: 0;
  display: flex; flex-direction: column;
  overflow: hidden; position: relative;
  background: #fff;
}

.discuss-mode-banner {
  padding: 8px 16px;
  background: #fffbeb; border-bottom: 1px solid #fde68a;
  color: #92400e; font-size: 12px;
}
.discuss-mode-banner.muted { background: #f0f0ee; color: #666; border-color: #e5e5e5; }

.editor-toolbar {
  display: flex; align-items: center; gap: 12px;
  padding: 8px 16px;
  border-bottom: 1px solid #f0f0ee;
  background: #fafafa;
  font-size: 12px; color: #777;
}
.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;
}
.btn-review-toggle.active { background: #1a1a1a; color: #fff; border-color: #1a1a1a; }
.editor-toolbar-hint { color: #999; font-size: 11px; }

.editor-wrapper {
  flex: 1; overflow-y: auto;
  padding: 32px 48px;
}
.editor-content {
  max-width: 720px; margin: 0 auto; outline: none;
}
.editor-content .tiptap {
  outline: none; font-size: 15px; line-height: 1.75; color: #1a1a1a;
}
.editor-content .tiptap h1 { font-size: 22px; font-weight: 700; margin: 24px 0 12px; }
.editor-content .tiptap h2 { font-size: 17px; font-weight: 600; margin: 20px 0 8px; }
.editor-content .tiptap h3 { font-size: 15px; font-weight: 600; margin: 16px 0 6px; }
.editor-content .tiptap p { margin: 0 0 12px; }
.editor-content .tiptap ul, .editor-content .tiptap ol { padding-left: 24px; }
.editor-content .tiptap code { background: #f0f0ee; padding: 1px 5px; border-radius: 3px; font-size: 13px; }

.editor-content .tiptap .paragraph-changed {
  border-left: 3px solid #f59e0b;
  padding-left: 10px;
  margin-left: -13px;
  background: linear-gradient(to right, #fffbeb 0%, transparent 60%);
  border-radius: 0 4px 4px 0;
}
.editor-content .tiptap .selection-highlight {
  background: rgba(99, 102, 241, 0.15);
  border-radius: 2px;
  outline: 1px solid rgba(99, 102, 241, 0.3);
  outline-offset: 1px;
}
.editor-content .tiptap .tracked-delete {
  background: #fee2e2; color: #991b1b; text-decoration: line-through;
  border-radius: 2px; padding: 1px 2px; cursor: pointer;
}
.editor-content .tiptap .tracked-insert {
  background: #dcfce7; color: #166534;
  border-radius: 2px; padding: 1px 2px; cursor: pointer;
}

.readonly-bar {
  border-top: 1px solid #e5e5e5;
  padding: 10px 16px; text-align: center;
  font-size: 13px; color: #888; background: #fafafa;
}
.readonly-bar a { color: #1a1a1a; font-weight: 600; }

/* ── Prompt bar ──────────────────────────────────────────────────────── */

.prompt-bar {
  border-top: 1px solid #e5e5e5;
  background: #fff;
  padding: 12px 48px;
  flex-shrink: 0;
}
.selection-badge {
  font-size: 12px; color: #5b5bd6;
  margin-bottom: 8px; display: flex; align-items: center; gap: 6px;
}
.selection-icon { font-size: 10px; }
.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;
  resize: none; line-height: 1.5; outline: none;
  min-height: 40px; max-height: 120px;
}
.prompt-input:focus { border-color: #1a1a1a; }
.prompt-submit {
  background: #1a1a1a; color: #fff; border: none;
  border-radius: 8px; padding: 9px 16px;
  font-size: 13px; font-weight: 600; cursor: pointer;
  height: 40px;
}
.prompt-submit:disabled { background: #ccc; 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;
  cursor: pointer;
}
.model-pill:hover { border-color: #aaa; color: #333; }
.model-pill.active { font-weight: 700; }
.model-dot { width: 7px; height: 7px; border-radius: 50%; }

/* ── Selection tooltip ───────────────────────────────────────────────── */

.selection-tooltip {
  position: fixed; z-index: 100;
  background: #fff; border: 1px solid #e5e5e5;
  border-radius: 10px;
  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;
  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;
}
.selection-tooltip-tab.active { background: #1a1a1a; color: #fff; }
.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;
}
.selection-tooltip-input:focus { border-color: #1a1a1a; background: #fff; }
.selection-tooltip-btn {
  background: #1a1a1a; color: #fff;
  border: none; border-radius: 6px;
  padding: 6px 12px; font-size: 13px; font-weight: 600; cursor: pointer;
}
.selection-tooltip-btn:disabled { background: #ccc; cursor: default; }

/* ── Right panel (chat + change panel) ───────────────────────────────── */

.right-panel {
  width: 360px; flex-shrink: 0;
  border-left: 1px solid #e5e5e5;
  display: flex; flex-direction: column;
  overflow: hidden; background: #fff;
}

.chat-panel {
  flex: 1; display: flex; flex-direction: column;
  overflow: hidden; min-height: 0;
}
.chat-header {
  padding: 10px 14px;
  border-bottom: 1px solid #f0f0ee;
  background: #fafafa;
  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-fork-link {
  background: none; border: none; padding: 0;
  font-size: 11px; color: #5b5bd6; cursor: pointer;
}
.chat-thread-disclosure {
  font-size: 11px; color: #888;
  display: flex; gap: 4px; align-items: center;
}
.chat-thread-flag-count { color: #b45309; }
.chat-filter-clear {
  margin-left: auto;
  background: none; border: none; cursor: pointer;
  font-size: 11px; color: #5b5bd6;
}
.chat-messages {
  flex: 1; overflow-y: auto;
  padding: 14px;
  display: flex; flex-direction: column; gap: 10px;
}
.chat-empty {
  flex: 1; display: flex; flex-direction: column;
  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-message { display: flex; flex-direction: column; gap: 3px; }
.chat-message.user { align-items: flex-end; }
.chat-message.assistant { align-items: flex-start; }
.chat-message.system { align-items: stretch; }
.chat-message.flag { align-items: stretch; }
.chat-message.in-thread { padding-left: 12px; border-left: 2px solid #c4b5fd; }

.chat-bubble {
  max-width: 92%;
  padding: 8px 11px; border-radius: 14px;
  font-size: 13px; 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;
}
.chat-message.assistant .chat-bubble {
  background: #f3f4f6; color: #1a1a1a; border-bottom-left-radius: 4px;
}
.chat-message.streaming .chat-bubble { opacity: 0.85; }
.chat-thinking { color: #999; font-style: italic; }
.chat-cursor {
  display: inline-block; width: 2px; height: 12px;
  background: #7c3aed; 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;
  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;
}

.chat-model-label {
  font-size: 11px; font-weight: 700;
  display: flex; align-items: center; gap: 4px; padding-left: 2px;
}
.chat-model-dot { width: 6px; height: 6px; border-radius: 50%; }

.chat-change-hint {
  align-self: flex-start;
  background: none; border: none; padding: 0;
  font-size: 11px; color: #7c3aed; font-weight: 600;
  cursor: pointer;
}
.chat-change-hint.discuss { color: #b45309; }
.chat-change-hint-cta {
  background: none; border: none; padding: 0;
  color: #5b5bd6; 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;
}
.chat-flag-row {
  display: flex; gap: 8px;
  padding: 8px 10px;
  background: #fff7ed; border: 1px solid #fdba74; border-radius: 8px;
}
.chat-flag-icon { color: #c2410c; font-size: 14px; }
.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-resolve {
  margin-top: 6px;
  background: none; border: 1px solid #fdba74;
  border-radius: 5px; padding: 2px 8px;
  font-size: 11px; color: #c2410c; cursor: pointer;
}

/* ── Change panel ──────────────────────────────────────────────── */

.change-panel {
  border-top: 1px solid #e5e5e5;
  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;
  display: flex; align-items: center; gap: 8px;
}
.badge {
  background: #b45309; color: #fff;
  font-size: 11px; padding: 2px 7px; border-radius: 10px;
}
.change-list { flex: 1; overflow-y: auto; padding: 8px; }
.change-group-label {
  font-size: 10px; font-weight: 700;
  text-transform: uppercase; letter-spacing: 0.06em;
  color: #aaa; padding: 8px 6px 4px;
}
.change-group-label.muted { color: #ccc; }

.change-item {
  border-radius: 8px;
  padding: 10px;
  margin-bottom: 8px;
  border: 1px solid #e5e5e5;
  font-size: 13px;
}
.change-item.type-claude { border-left: 3px solid #5b5bd6; }
.change-item.type-manual { border-left: 3px solid #888; }
.change-item.state-accepted { opacity: 0.5; }
.change-item.state-declined { opacity: 0.4; }
.change-item.stale { border-color: #fbbf24; background: #fffbeb; }
.change-item.focused {
  animation: change-focus-flash 1.8s ease forwards;
}
@keyframes change-focus-flash {
  0%   { box-shadow: 0 0 0 3px #3b82f6; }
  70%  { box-shadow: 0 0 0 3px #3b82f6; }
  100% { box-shadow: none; }
}
.change-meta {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 6px;
}
.change-author { font-weight: 600; font-size: 12px; }
.change-state-badge {
  font-size: 10px; padding: 2px 7px; border-radius: 10px;
  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-stale-banner {
  font-size: 11px; color: #92400e;
  background: #fef3c7; border-radius: 4px;
  padding: 4px 8px; margin-bottom: 6px;
}
.change-manual-status {
  font-size: 11px; color: #888;
  display: flex; align-items: center; justify-content: space-between;
  margin-top: 6px;
}
.btn-save-now {
  background: none; border: 1px solid #d4d4d4;
  border-radius: 4px; padding: 2px 8px;
  font-size: 11px; font-weight: 600; cursor: pointer;
}
.change-source-link {
  background: none; border: none; padding: 0;
  font-size: 11px; color: #5b5bd6; 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;
}
.btn-edit {
  background: none; border: 1px solid #c4b5fd; color: #7c3aed;
  border-radius: 5px; padding: 5px 10px; font-size: 12px; font-weight: 600; cursor: pointer;
}
.btn-decline {
  background: none; border: 1px solid #e5e5e5;
  border-radius: 5px; padding: 5px 10px; font-size: 12px; 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;
}
.diff-edit-textarea {
  width: 100%; font-size: 12px; font-family: inherit;
  line-height: 1.5; border: 1px solid #c4b5fd;
  border-radius: 4px; padding: 6px; resize: vertical;
}
.inline-diff {
  font-size: 12px; line-height: 1.7;
  background: #f9fafb; border-radius: 4px;
  padding: 8px 10px;
  white-space: pre-wrap; word-break: break-word;
  border: 1px solid #e5e5e5;
}
.diff-word-add {
  background: #dcfce7; color: #166534;
  border-radius: 2px; padding: 1px 1px;
}
.diff-word-remove {
  background: #fee2e2; color: #991b1b;
  text-decoration: line-through;
  border-radius: 2px; padding: 1px 1px;
}
.text-fade { color: #aaa; }
.expand-toggle {
  display: block; margin-top: 5px;
  background: none; border: none; padding: 0;
  font-size: 11px; font-weight: 600; color: #7c3aed;
  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;
}
.change-stub .stub-author { font-weight: 600; color: #555; }
.change-stub .stub-badge {
  font-size: 9px; padding: 1px 5px; border-radius: 8px;
}
.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-source-link {
  background: none; border: none; padding: 0;
  font-size: 11px; color: #5b5bd6; cursor: pointer;
}

.contribution-cta {
  border-top: 1px solid #e5e5e5;
  background: #fafafa;
  padding: 16px;
  text-align: center;
}
.contribution-cta-count {
  font-size: 13px; font-weight: 600; color: #1a1a1a;
}
.contribution-cta-desc {
  font-size: 12px; color: #666; margin: 6px 0 12px;
}
.btn-start-contribution {
  background: #1a1a1a; color: #fff;
  border: none; border-radius: 6px;
  padding: 8px 14px;
  font-size: 13px; font-weight: 600; cursor: pointer;
}

/* ── DiffView ──────────────────────────────────────────────────── */

.diff-view-wrapper {
  flex: 1; overflow-y: auto;
  padding: 32px 48px;
}
.diff-view-empty {
  font-size: 13px; color: #999;
  text-align: center; padding: 24px;
}
.diff-tooltip {
  background: #fff; border: 1px solid #e5e5e5;
  border-radius: 8px; padding: 10px 12px;
  box-shadow: 0 6px 24px rgba(0,0,0,0.12);
  max-width: 320px; font-size: 12px;
  z-index: 200;
}
.diff-tooltip-header {
  display: flex; gap: 4px; flex-wrap: wrap;
  margin-bottom: 6px;
}
.diff-tooltip-badge {
  font-size: 10px; padding: 2px 7px; border-radius: 8px;
  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-prompt {
  border-top: 1px solid #f0f0ee;
  padding-top: 6px;
  font-size: 11px; color: #444;
}
.diff-tooltip-quote {
  font-style: italic; color: #888; margin-bottom: 4px;
}
.diff-tooltip-reason {
  border-top: 1px solid #f0f0ee;
  padding-top: 6px; margin-top: 6px;
  color: #555;
}
.diff-tooltip-reason-label {
  display: inline-block; font-size: 9px; font-weight: 700;
  color: #888; text-transform: uppercase; letter-spacing: 0.04em;
  margin-right: 6px;
}
.diff-tooltip-no-context {
  font-size: 11px; color: #aaa; font-style: italic;
}