/* ChatPlot workspace: design tokens + components. One system, light and dark. */

:root {
  --font-sans: "Instrument Sans", "Segoe UI", system-ui, -apple-system, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace;

  --bg: #f6f7f9;
  --surface: #ffffff;
  --surface-2: #f1f3f6;
  --surface-3: #e8ebf0;
  --border: #e2e6ec;
  --border-strong: #c9d0da;
  --text: #16181d;
  --text-2: #4b5563;
  --text-3: #7b8494;
  --accent: #2f5bff;
  --accent-strong: #1f47e0;
  --accent-soft: #e8edff;
  --accent-text: #ffffff;
  --success: #0f9d58;
  --success-soft: #e3f6ea;
  --warning: #b45309;
  --warning-soft: #fdf1e0;
  --danger: #d1343e;
  --danger-soft: #fde9ea;
  --canvas-bg: #ffffff;
  --canvas-grid: #e9edf3;
  --focus: #2f5bff;
  --shadow-1: 0 1px 2px rgba(16, 24, 40, 0.06), 0 1px 3px rgba(16, 24, 40, 0.08);
  --shadow-2: 0 8px 24px rgba(16, 24, 40, 0.12);
  --shadow-3: 0 24px 60px rgba(16, 24, 40, 0.22);

  --radius-1: 6px;
  --radius-2: 10px;
  --radius-3: 14px;
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --rail-w: 272px;
  --side-w: 400px;
  --topbar-h: 56px;
  --toolbar-h: 44px;
  --tap: 40px;
  --motion-fast: 120ms;
  --motion: 200ms;
  --ease: cubic-bezier(0.2, 0.8, 0.2, 1);
  color-scheme: light;
}

:root[data-theme="dark"] {
  --bg: #0f1115;
  --surface: #171a21;
  --surface-2: #1e222b;
  --surface-3: #262b36;
  --border: #2a303b;
  --border-strong: #3a4250;
  --text: #eef1f6;
  --text-2: #b4bcc9;
  --text-3: #7f8898;
  --accent: #6d8bff;
  --accent-strong: #8aa2ff;
  --accent-soft: #1f2a4d;
  --accent-text: #0b1020;
  --success: #34c37f;
  --success-soft: #12312a;
  --warning: #f2a33c;
  --warning-soft: #3a2a12;
  --danger: #ff6b6b;
  --danger-soft: #3d1c1e;
  --canvas-bg: #f8fafc;
  --canvas-grid: #d7dde6;
  --focus: #8aa2ff;
  --shadow-1: 0 1px 2px rgba(0, 0, 0, 0.4);
  --shadow-2: 0 8px 24px rgba(0, 0, 0, 0.5);
  --shadow-3: 0 24px 60px rgba(0, 0, 0, 0.6);
  color-scheme: dark;
}

@media (prefers-reduced-motion: reduce) {
  :root { --motion-fast: 0ms; --motion: 0ms; }
  *, *::before, *::after { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
}

*, *::before, *::after { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 14px;
  line-height: 1.45;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  overflow: hidden;
}
button, input, textarea, select { font: inherit; color: inherit; }
button { cursor: pointer; }
button:disabled { cursor: not-allowed; opacity: 0.55; }
svg { display: block; }
.icon-btn svg, .tool-btn svg, .btn svg, .rail-foot-btn svg, .mobile-tabs svg { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
:focus-visible { outline: 2px solid var(--focus); outline-offset: 2px; }
.sr-only { position: absolute !important; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }
.skip-link { position: absolute; left: 8px; top: -48px; z-index: 100; padding: 8px 12px; background: var(--surface); border: 1px solid var(--border-strong); border-radius: var(--radius-1); }
.skip-link:focus { top: 8px; }
[hidden] { display: none !important; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  min-height: var(--tap); padding: 0 14px; border-radius: var(--radius-2);
  border: 1px solid var(--border-strong); background: var(--surface); color: var(--text);
  font-weight: 600; white-space: nowrap; transition: background var(--motion-fast), border-color var(--motion-fast), transform var(--motion-fast);
}
.btn:hover:not(:disabled) { background: var(--surface-2); }
.btn:active:not(:disabled) { transform: translateY(1px); }
.btn-primary { background: var(--accent); border-color: var(--accent); color: var(--accent-text); }
.btn-primary:hover:not(:disabled) { background: var(--accent-strong); border-color: var(--accent-strong); }
.btn-ghost { background: transparent; border-color: transparent; }
.btn-ghost:hover:not(:disabled) { background: var(--surface-2); }
.btn-danger { color: var(--danger); border-color: var(--danger); background: transparent; }
.btn-danger:hover:not(:disabled) { background: var(--danger-soft); }
.btn-sm { min-height: 34px; padding: 0 12px; font-size: 13px; }
.btn-block { width: 100%; }
.icon-btn {
  display: inline-flex; align-items: center; justify-content: center; width: var(--tap); height: var(--tap);
  border-radius: var(--radius-2); border: 1px solid transparent; background: transparent; color: var(--text-2);
}
.icon-btn:hover:not(:disabled) { background: var(--surface-2); color: var(--text); }
.btn-group { display: inline-flex; gap: 2px; }
.avatar { display: inline-flex; align-items: center; justify-content: center; width: 32px; height: 32px; border-radius: 50%; background: var(--accent-soft); color: var(--accent); font-weight: 700; font-size: 13px; overflow: hidden; flex: none; }
.avatar img { width: 100%; height: 100%; object-fit: cover; }

/* ---------- Layout ---------- */
.app { display: grid; grid-template-columns: var(--rail-w) minmax(0, 1fr); grid-template-rows: minmax(0, 1fr); height: 100vh; height: 100dvh; width: 100vw; overflow: hidden; }
#dialogRoot { display: contents; }
.app.rail-collapsed { grid-template-columns: 0 minmax(0, 1fr); }
.app.rail-collapsed .rail { transform: translateX(-100%); visibility: hidden; }
.workspace { display: flex; flex-direction: column; min-width: 0; min-height: 0; background: var(--bg); }

/* ---------- Rail ---------- */
.rail { display: flex; flex-direction: column; min-height: 0; background: var(--surface); border-right: 1px solid var(--border); transition: transform var(--motion) var(--ease), visibility var(--motion); }
.rail-head { display: flex; align-items: center; justify-content: space-between; padding: 10px 10px 6px 14px; height: var(--topbar-h); }
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--text); text-decoration: none; font-weight: 700; font-size: 15px; }
.brand-mark { width: 28px; height: 28px; border-radius: 8px; }
.rail-actions { display: flex; gap: 8px; padding: 6px 12px; }
.rail-search { position: relative; margin: 6px 12px 8px; }
.rail-search svg { position: absolute; left: 10px; top: 50%; width: 16px; height: 16px; transform: translateY(-50%); stroke: var(--text-3); fill: none; stroke-width: 2; }
.rail-search input { width: 100%; height: 36px; padding: 0 10px 0 32px; border-radius: var(--radius-2); border: 1px solid var(--border); background: var(--surface-2); }
.rail-search input:focus { border-color: var(--accent); background: var(--surface); }
.rail-list { flex: 1; overflow: auto; padding: 4px 8px 12px; min-height: 0; }
.rail-section { margin-top: 8px; }
.rail-section-head { display: flex; align-items: center; gap: 4px; padding: 6px 8px; color: var(--text-3); font-size: 11px; font-weight: 700; letter-spacing: 0.06em; text-transform: uppercase; }
.rail-section-toggle { display: inline-flex; align-items: center; gap: 6px; flex: 1; min-width: 0; background: none; border: 0; padding: 0; color: inherit; font: inherit; text-align: left; letter-spacing: inherit; text-transform: inherit; }
.rail-section-toggle svg { width: 12px; height: 12px; transition: transform var(--motion-fast); stroke: currentColor; fill: none; stroke-width: 2.5; }
.rail-section.collapsed .rail-section-toggle svg { transform: rotate(-90deg); }
.rail-section.collapsed .rail-rows { display: none; }
.rail-section-count { color: var(--text-3); font-weight: 500; }
.rail-row { display: grid; grid-template-columns: 22px minmax(0, 1fr) auto; align-items: center; gap: 8px; width: 100%; min-height: var(--tap); padding: 6px 8px; border: 0; border-radius: var(--radius-2); background: transparent; color: var(--text); text-align: left; }
.rail-row:hover { background: var(--surface-2); }
.rail-row.active { background: var(--accent-soft); }
.rail-row .type-dot { width: 10px; height: 10px; border-radius: 3px; background: hsl(var(--hue, 208) 70% 55%); justify-self: center; }
.rail-row .row-title { font-weight: 500; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.rail-row .row-meta { font-size: 11px; color: var(--text-3); white-space: nowrap; }
.rail-row-wrap { position: relative; }
.rail-row-menu { position: absolute; right: 4px; top: 50%; transform: translateY(-50%); opacity: 0; }
.rail-row-wrap:hover .rail-row-menu, .rail-row-wrap:focus-within .rail-row-menu, .rail-row-wrap.active .rail-row-menu { opacity: 1; }
@media (hover: none) { .rail-row-menu { opacity: 1; } }
.rail-empty { padding: 16px 10px; color: var(--text-3); font-size: 13px; }
.rail-foot { border-top: 1px solid var(--border); padding: 8px; display: grid; gap: 4px; }
.rail-foot-btn { display: flex; align-items: center; gap: 10px; min-height: var(--tap); padding: 0 10px; border: 0; border-radius: var(--radius-2); background: transparent; color: var(--text-2); text-align: left; }
.rail-foot-btn:hover { background: var(--surface-2); color: var(--text); }
.rail-account { display: flex; align-items: center; gap: 10px; min-height: 48px; padding: 6px 10px; border: 0; border-radius: var(--radius-2); background: transparent; text-align: left; color: var(--text); }
.rail-account:hover { background: var(--surface-2); }
.rail-account-copy { display: grid; min-width: 0; }
.rail-account-name { font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.rail-account-meta { font-size: 12px; color: var(--text-3); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.rail-backdrop { position: fixed; inset: 0; background: rgba(0, 0, 0, 0.4); z-index: 30; }

/* ---------- Top bar ---------- */
.topbar { display: flex; align-items: center; gap: 8px; height: var(--topbar-h); padding: 0 12px 0 8px; background: var(--surface); border-bottom: 1px solid var(--border); }
.topbar-rail-toggle { display: none; }
.app.rail-collapsed .topbar-rail-toggle { display: inline-flex; }
.title-wrap { display: grid; min-width: 0; flex: 1; }
.title-input { width: 100%; max-width: 520px; min-width: 0; height: 30px; padding: 0 8px; margin-left: -8px; border: 1px solid transparent; border-radius: var(--radius-1); background: transparent; font-weight: 700; font-size: 16px; }
.title-input:hover { border-color: var(--border); }
.title-input:focus { border-color: var(--accent); background: var(--surface); outline: none; }
.save-state { display: inline-flex; align-items: center; gap: 6px; font-size: 12px; color: var(--text-3); padding-left: 1px; }
.save-state::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: var(--text-3); }
.save-state[data-state="synced"]::before { background: var(--success); }
.save-state[data-state="saving"]::before { background: var(--accent); animation: pulse 1s infinite; }
.save-state[data-state="offline"]::before { background: var(--warning); }
.save-state[data-state="error"]::before, .save-state[data-state="conflict"]::before { background: var(--danger); }
.save-state[data-state="error"], .save-state[data-state="conflict"] { color: var(--danger); }
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.3; } }
.topbar-actions { display: flex; align-items: center; gap: 6px; }
.topbar-more { display: none; }

/* ---------- Work area ---------- */
.work-area { display: grid; grid-template-columns: minmax(0, 1fr) 6px var(--side-w); flex: 1; min-height: 0; }
.app.side-collapsed .work-area { grid-template-columns: minmax(0, 1fr) 0 0; }
.app.side-collapsed .side-pane, .app.side-collapsed .pane-resizer { display: none; }
.pane-resizer { cursor: col-resize; background: transparent; position: relative; }
.pane-resizer::after { content: ""; position: absolute; inset: 0 2px; background: var(--border); transition: background var(--motion-fast); }
.pane-resizer:hover::after, .pane-resizer:focus-visible::after, .pane-resizer.dragging::after { background: var(--accent); }

/* ---------- Canvas ---------- */
.canvas-pane { display: flex; flex-direction: column; min-width: 0; min-height: 0; background: var(--bg); }
.canvas-toolbar { display: flex; align-items: center; gap: 12px; height: var(--toolbar-h); padding: 0 10px; background: var(--surface); border-bottom: 1px solid var(--border); overflow-x: auto; scrollbar-width: none; }
.canvas-toolbar::-webkit-scrollbar { display: none; }
.toolbar-group { display: inline-flex; align-items: center; gap: 2px; flex: none; }
.toolbar-group-end { margin-left: auto; }
.tool-btn { display: inline-flex; align-items: center; gap: 6px; min-height: 32px; padding: 0 10px; border: 1px solid transparent; border-radius: var(--radius-1); background: transparent; color: var(--text-2); font-weight: 500; font-size: 13px; white-space: nowrap; }
.tool-btn.icon { width: 32px; padding: 0; justify-content: center; }
.tool-btn:hover:not(:disabled) { background: var(--surface-2); color: var(--text); }
.tool-btn[aria-pressed="true"], .tool-btn[aria-expanded="true"] { background: var(--accent-soft); color: var(--accent); }
.zoom-label { min-width: 46px; text-align: center; font-family: var(--font-mono); font-size: 12px; color: var(--text-2); }
.canvas { position: relative; flex: 1; min-height: 0; overflow: hidden; background: var(--canvas-bg); cursor: grab; touch-action: none; outline-offset: -3px; }
.canvas[data-background="grid"] { background-image: radial-gradient(var(--canvas-grid) 1px, transparent 1px); background-size: 22px 22px; }
.canvas[data-background="dark"] { --canvas-bg: #0b1220; background: #0b1220; }
.canvas.panning { cursor: grabbing; }
.viewport { position: absolute; left: 0; top: 0; transform-origin: 0 0; will-change: transform; }
.svg-host { display: block; }
.svg-host svg { display: block; max-width: none !important; height: auto; }
.canvas-status { position: absolute; left: 50%; top: 14px; transform: translateX(-50%); display: inline-flex; align-items: center; gap: 8px; padding: 8px 14px; border-radius: 999px; background: var(--surface); border: 1px solid var(--border); box-shadow: var(--shadow-1); font-size: 13px; z-index: 3; }
.canvas-status .spinner { width: 14px; height: 14px; border: 2px solid var(--border-strong); border-top-color: var(--accent); border-radius: 50%; animation: spin 0.8s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }
.error-banner { position: absolute; left: 12px; right: 12px; bottom: 12px; padding: 10px 12px; border-radius: var(--radius-2); background: var(--danger-soft); color: var(--danger); border: 1px solid color-mix(in srgb, var(--danger) 35%, transparent); font-size: 13px; z-index: 3; display: flex; gap: 10px; align-items: center; justify-content: space-between; }
.error-banner .btn { min-height: 30px; }

/* Start panel */
.canvas-start { position: absolute; inset: 0; display: flex; align-items: flex-start; justify-content: center; overflow: auto; padding: 24px 16px 40px; z-index: 2; }
.start-card { width: min(880px, 100%); }
.start-title { margin: 8px 0 6px; font-size: 22px; font-weight: 700; letter-spacing: -0.01em; }
.start-copy { margin: 0 0 14px; color: var(--text-2); max-width: 60ch; }
.start-actions { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 20px; }
.starter-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(190px, 1fr)); gap: 10px; }
.starter-card { display: grid; gap: 8px; padding: 12px; border: 1px solid var(--border); border-radius: var(--radius-3); background: var(--surface); text-align: left; transition: border-color var(--motion-fast), transform var(--motion-fast), box-shadow var(--motion-fast); }
.starter-card:hover { border-color: var(--accent); transform: translateY(-1px); box-shadow: var(--shadow-1); }
.starter-preview { height: 84px; border-radius: var(--radius-2); background: var(--surface-2); display: flex; align-items: center; justify-content: center; overflow: hidden; }
.starter-preview svg { width: 100%; height: 100%; }
.starter-title { font-weight: 600; }
.starter-blurb { font-size: 12px; color: var(--text-3); line-height: 1.35; }
.starter-type { display: inline-block; font-size: 11px; font-weight: 600; color: var(--accent); background: var(--accent-soft); padding: 2px 6px; border-radius: 999px; }

/* ---------- Side pane ---------- */
.side-pane { display: flex; flex-direction: column; min-width: 0; min-height: 0; background: var(--surface); border-left: 1px solid var(--border); }
.side-tabs { display: flex; gap: 2px; padding: 6px 8px 0; border-bottom: 1px solid var(--border); }
.side-tabs [role="tab"] { flex: 1; min-height: 38px; border: 0; border-bottom: 2px solid transparent; background: transparent; color: var(--text-2); font-weight: 600; border-radius: var(--radius-1) var(--radius-1) 0 0; }
.side-tabs [role="tab"]:hover { background: var(--surface-2); }
.side-tabs [role="tab"][aria-selected="true"] { color: var(--accent); border-bottom-color: var(--accent); }
.tab-panel { display: flex; flex-direction: column; flex: 1; min-height: 0; }
.chat-body { flex: 1; min-height: 0; overflow: auto; padding: 14px 14px 6px; display: flex; flex-direction: column; gap: 14px; scroll-behavior: smooth; }
.msg { display: grid; gap: 4px; max-width: 100%; }
.msg .role { font-size: 11px; font-weight: 700; color: var(--text-3); letter-spacing: 0.04em; text-transform: uppercase; display: flex; gap: 8px; align-items: center; }
.msg .badge { font-size: 10px; font-weight: 700; padding: 1px 6px; border-radius: 999px; background: var(--surface-3); color: var(--text-2); text-transform: none; letter-spacing: 0; }
.msg .bubble { padding: 10px 12px; border-radius: var(--radius-3); background: var(--surface-2); white-space: pre-wrap; overflow-wrap: anywhere; }
.msg-user .bubble { background: var(--accent-soft); }
.msg-assistant .bubble p { margin: 0 0 8px; }
.msg-assistant .bubble p:last-child { margin: 0; }
.msg-assistant .bubble ol, .msg-assistant .bubble ul { margin: 6px 0; padding-left: 20px; }
.msg-pending .bubble { color: var(--text-3); }
.msg-error .bubble { background: var(--danger-soft); color: var(--danger); }
.msg .actions { display: flex; flex-wrap: wrap; gap: 6px; }
.msg .actions .btn { min-height: 30px; padding: 0 10px; font-size: 12px; }
.msg .change-summary { font-size: 12px; color: var(--text-3); }
.chat-empty { margin: auto 0; padding: 12px; color: var(--text-3); font-size: 13px; text-align: center; }
.quick-actions { display: flex; flex-wrap: wrap; gap: 6px; padding: 4px 14px 6px; }
.quick-actions button { min-height: 30px; padding: 0 10px; border-radius: 999px; border: 1px solid var(--border-strong); background: var(--surface); font-size: 12px; font-weight: 500; }
.quick-actions button:hover { border-color: var(--accent); color: var(--accent); }
.usage-strip { display: flex; align-items: center; justify-content: space-between; gap: 8px; margin: 0 14px 6px; padding: 8px 10px; border-radius: var(--radius-2); background: var(--warning-soft); color: var(--warning); font-size: 12px; }
.usage-strip.ok { background: var(--surface-2); color: var(--text-2); }
.usage-strip button { min-height: 28px; padding: 0 10px; border-radius: 999px; border: 1px solid currentColor; background: transparent; color: inherit; font-size: 12px; font-weight: 600; }
.composer { display: grid; gap: 6px; padding: 8px 14px 12px; border-top: 1px solid var(--border); }
.composer textarea { width: 100%; min-height: 44px; max-height: 40vh; padding: 10px 12px; border: 1px solid var(--border-strong); border-radius: var(--radius-2); background: var(--surface); resize: none; line-height: 1.4; }
.composer textarea:focus { border-color: var(--accent); outline: none; box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 20%, transparent); }
.composer-row { display: flex; align-items: center; justify-content: space-between; gap: 8px; }
.composer-hint { font-size: 11px; color: var(--text-3); }
.composer-buttons { display: flex; gap: 6px; }
.auth-nudge { display: flex; align-items: center; justify-content: space-between; gap: 10px; margin: 0 14px 12px; padding: 10px 12px; border-radius: var(--radius-2); background: var(--accent-soft); font-size: 13px; }
.source-editor { flex: 1; min-height: 0; width: 100%; padding: 12px 14px; border: 0; background: var(--surface-2); font-family: var(--font-mono); font-size: 12.5px; line-height: 1.55; resize: none; tab-size: 2; }
.source-editor:focus { outline: none; background: var(--surface); }
.source-status { padding: 6px 14px; font-size: 12px; color: var(--text-3); min-height: 28px; }
.source-status.ok { color: var(--success); }
.source-status.error { color: var(--danger); white-space: pre-wrap; font-family: var(--font-mono); font-size: 11.5px; }
.source-actions { display: flex; flex-wrap: wrap; gap: 6px; padding: 6px 14px 12px; border-top: 1px solid var(--border); }
.history-intro { margin: 0; padding: 12px 14px 6px; font-size: 12px; color: var(--text-3); }
.history-list { list-style: none; margin: 0; padding: 4px 8px 12px; overflow: auto; display: grid; gap: 4px; }
.history-item { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 8px; align-items: center; padding: 8px 10px; border-radius: var(--radius-2); border: 1px solid var(--border); background: var(--surface); }
.history-item.current { border-color: var(--accent); background: var(--accent-soft); }
.history-item .h-title { font-weight: 600; font-size: 13px; }
.history-item .h-meta { font-size: 11px; color: var(--text-3); }
.history-item .h-actions { display: flex; gap: 4px; }
.history-item .h-actions .btn { min-height: 28px; padding: 0 8px; font-size: 12px; }

/* ---------- Menus ---------- */
.menu-wrap { position: relative; }
.popup-menu { position: fixed; z-index: 60; min-width: 200px; max-width: 320px; padding: 6px; border-radius: var(--radius-2); background: var(--surface); border: 1px solid var(--border); box-shadow: var(--shadow-2); }
.popup-menu [role="menuitem"], .popup-menu [role="menuitemradio"] { display: flex; align-items: center; gap: 8px; width: 100%; min-height: 36px; padding: 6px 10px; border: 0; border-radius: var(--radius-1); background: transparent; color: var(--text); text-align: left; }
.popup-menu [role="menuitem"]:hover, .popup-menu [role="menuitem"]:focus-visible, .popup-menu [role="menuitemradio"]:hover { background: var(--surface-2); outline: none; }
.popup-menu [role="menuitemradio"][aria-checked="true"]::before { content: "✓"; color: var(--accent); }
.popup-menu [role="menuitemradio"]::before { content: ""; width: 14px; text-align: center; }
.popup-menu .menu-label { padding: 6px 10px 2px; font-size: 11px; font-weight: 700; color: var(--text-3); text-transform: uppercase; letter-spacing: 0.06em; }
.popup-menu .menu-sep { height: 1px; margin: 4px 0; background: var(--border); }
.popup-menu .danger { color: var(--danger); }

/* ---------- Dialogs ---------- */
dialog.app-dialog { width: min(560px, calc(100vw - 32px)); max-height: min(90vh, 860px); padding: 0; border: 1px solid var(--border); border-radius: var(--radius-3); background: var(--surface); color: var(--text); box-shadow: var(--shadow-3); }
dialog.app-dialog.wide { width: min(820px, calc(100vw - 32px)); }
dialog.app-dialog::backdrop { background: rgba(10, 12, 18, 0.55); }
.dialog-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 12px; padding: 18px 20px 8px; }
.dialog-title { margin: 0; font-size: 18px; font-weight: 700; }
.dialog-sub { margin: 4px 0 0; color: var(--text-2); font-size: 13px; }
.dialog-body { padding: 8px 20px 16px; overflow: auto; max-height: calc(90vh - 150px); }
.dialog-body p { margin: 0 0 10px; }
.dialog-foot { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 8px; padding: 12px 20px 18px; border-top: 1px solid var(--border); }
.dialog-foot .left { margin-right: auto; }
.field { display: grid; gap: 6px; margin-bottom: 12px; }
.field label { font-weight: 600; font-size: 13px; }
.field input[type="text"], .field select, .field textarea { min-height: 38px; padding: 6px 10px; border: 1px solid var(--border-strong); border-radius: var(--radius-2); background: var(--surface); }
.field .help { font-size: 12px; color: var(--text-3); }
.choice-row { display: flex; flex-wrap: wrap; gap: 6px; }
.choice { display: inline-flex; align-items: center; gap: 6px; min-height: 34px; padding: 0 12px; border-radius: 999px; border: 1px solid var(--border-strong); background: var(--surface); font-weight: 500; }
.choice[aria-checked="true"] { border-color: var(--accent); background: var(--accent-soft); color: var(--accent); }
.choice.locked { color: var(--text-3); }
.export-preview { display: flex; align-items: center; justify-content: center; min-height: 160px; max-height: 260px; overflow: hidden; margin-bottom: 12px; border-radius: var(--radius-2); border: 1px solid var(--border); background: var(--canvas-bg); background-image: radial-gradient(var(--canvas-grid) 1px, transparent 1px); background-size: 16px 16px; }
.export-preview svg, .export-preview img { max-width: 100%; max-height: 240px; height: auto; }
.callout { padding: 10px 12px; border-radius: var(--radius-2); background: var(--surface-2); font-size: 13px; color: var(--text-2); }
.callout.warn { background: var(--warning-soft); color: var(--warning); }
.callout.danger { background: var(--danger-soft); color: var(--danger); }
.share-url { display: flex; gap: 6px; }
.share-url input { flex: 1; min-width: 0; font-family: var(--font-mono); font-size: 12px; }
.plan-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); gap: 10px; }
.plan-card { padding: 14px; border: 1px solid var(--border); border-radius: var(--radius-3); background: var(--surface); display: grid; gap: 8px; align-content: start; }
.plan-card.current { border-color: var(--accent); }
.plan-card.muted { opacity: 0.75; }
.plan-name { font-weight: 700; display: flex; justify-content: space-between; gap: 6px; align-items: center; }
.plan-price { font-size: 20px; font-weight: 700; }
.plan-price small { font-size: 12px; font-weight: 500; color: var(--text-3); }
.plan-list { margin: 0; padding-left: 18px; font-size: 13px; color: var(--text-2); }
.pill { display: inline-block; padding: 2px 8px; border-radius: 999px; background: var(--surface-3); font-size: 11px; font-weight: 700; }
.pill.accent { background: var(--accent-soft); color: var(--accent); }
.usage-meter { height: 8px; border-radius: 999px; background: var(--surface-3); overflow: hidden; }
.usage-meter > span { display: block; height: 100%; background: var(--accent); }
.usage-meter.warn > span { background: var(--warning); }
.usage-meter.full > span { background: var(--danger); }
.stat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(120px, 1fr)); gap: 8px; }
.stat { padding: 10px; border-radius: var(--radius-2); background: var(--surface-2); }
.stat .k { font-size: 11px; color: var(--text-3); text-transform: uppercase; letter-spacing: 0.05em; }
.stat .v { font-size: 18px; font-weight: 700; }
.table { width: 100%; border-collapse: collapse; font-size: 12.5px; }
.table th, .table td { padding: 6px 8px; border-bottom: 1px solid var(--border); text-align: left; vertical-align: top; }
.table th { color: var(--text-3); font-weight: 600; }
.table-wrap { overflow-x: auto; }
.legal-links a { color: var(--accent); }
.checkbox-row { display: flex; gap: 8px; align-items: flex-start; margin: 8px 0; }
.checkbox-row input { margin-top: 3px; }

/* ---------- Toasts ---------- */
.toast-region { position: fixed; left: calc(var(--rail-w) + 16px); bottom: 16px; display: grid; gap: 8px; z-index: 80; pointer-events: none; max-width: min(420px, calc(100vw - 32px)); }
.app.rail-collapsed ~ .toast-region, .app.rail-collapsed .toast-region { left: 16px; }
.toast { pointer-events: auto; display: flex; align-items: center; gap: 10px; padding: 10px 14px; border-radius: var(--radius-2); background: var(--text); color: var(--bg); box-shadow: var(--shadow-2); font-size: 13px; animation: toast-in var(--motion) var(--ease); }
.toast .btn { min-height: 28px; padding: 0 10px; font-size: 12px; background: transparent; color: inherit; border-color: color-mix(in srgb, currentColor 40%, transparent); }
@keyframes toast-in { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }

/* ---------- Laptop: tighter rail and side pane ---------- */
@media (max-width: 1200px) {
  :root { --rail-w: 232px; --side-w: 340px; }
  .canvas-toolbar { gap: 6px; }
}

/* ---------- Mobile ---------- */
.mobile-tabs { display: none; }
@media (max-width: 900px) {
  .topbar-more { display: inline-flex; }
  .toast-region { left: 12px; right: 12px; bottom: calc(52px + env(safe-area-inset-bottom) + 12px); max-width: none; }
  .app { grid-template-columns: minmax(0, 1fr); }
  .app.rail-collapsed { grid-template-columns: minmax(0, 1fr); }
  .rail { position: fixed; left: 0; top: 0; bottom: 0; width: min(88vw, 320px); z-index: 40; transform: translateX(-100%); visibility: hidden; box-shadow: var(--shadow-3); }
  .app[data-view="rail"] .rail { transform: none; visibility: visible; }
  .topbar-rail-toggle { display: inline-flex; }
  .topbar-actions .btn-group { display: none; }
  .topbar-actions #btnHistory { display: none; }
  .work-area { grid-template-columns: minmax(0, 1fr); }
  .pane-resizer { display: none; }
  .side-pane { display: none; border-left: 0; }
  .app[data-view="chat"] .side-pane { display: flex; }
  .app[data-view="chat"] .canvas-pane { display: none; }
  .app.side-collapsed .side-pane { display: none; }
  .app.side-collapsed[data-view="chat"] .side-pane { display: flex; }
  .mobile-tabs { display: grid; grid-template-columns: repeat(3, 1fr); height: calc(52px + env(safe-area-inset-bottom)); padding-bottom: env(safe-area-inset-bottom); background: var(--surface); border-top: 1px solid var(--border); }
  .mobile-tabs button { display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 2px; border: 0; background: transparent; color: var(--text-3); font-size: 11px; font-weight: 600; }
  .mobile-tabs button[aria-pressed="true"] { color: var(--accent); }
  .composer { padding-bottom: 10px; }
  .canvas-start { padding: 16px 12px 60px; }
  .starter-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  #btnSidePane { display: none; }
  .title-input { font-size: 15px; }
  dialog.app-dialog { width: calc(100vw - 16px); max-height: calc(100dvh - 16px); }
}
@media (max-width: 480px) {
  .starter-grid { grid-template-columns: 1fr; }
  .topbar-actions #btnExport { display: none; }
}

/* ---------- Presentation / fullscreen ---------- */
.app.presenting .canvas-toolbar, .app.presenting .topbar, .app.presenting .rail, .app.presenting .side-pane, .app.presenting .pane-resizer, .app.presenting .mobile-tabs { display: none !important; }
.app.presenting { grid-template-columns: minmax(0, 1fr); }
.app.presenting .work-area { grid-template-columns: minmax(0, 1fr); }
.present-exit { position: fixed; top: 12px; right: 12px; z-index: 50; }

/* ---------- Utilities ---------- */
.muted { color: var(--text-3); }
.mono { font-family: var(--font-mono); }
.row { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.spacer { flex: 1; }
.kbd { font-family: var(--font-mono); font-size: 11px; padding: 1px 5px; border: 1px solid var(--border-strong); border-bottom-width: 2px; border-radius: 4px; background: var(--surface-2); }