/* ==========================================================================
   Async Theme Builder — app chrome (topbar, sidebar, config panels, CSS drawer).
   Preview/component styles live in preview.css — kept separate because the
   preview canvas is themed by the GENERATED tokens, while this file is
   themed by the TOOL's own fixed light/dark palette.
   ========================================================================== */

@font-face {
  font-family: 'Fraunces';
  src: local('Fraunces');
  font-weight: 300 700;
}

:root {
  color-scheme: light;
  --ground: #f6f4f0;
  --surface: #ffffff;
  --surface-raised: #ffffff;
  --border: #e2ded4;
  --border-strong: #cfc9ba;
  --text: #221f1a;
  --text-dim: #6b6558;
  --text-faint: #a39c8a;
  --accent: #1a1a1a;
  --accent-ink: #ffffff;
  --accent-soft: #ececec;
  --good: #1c8a5a;
  --warn: #b9750c;
  --bad: #c23a3a;
  --shadow-sm: 0 1px 2px rgba(30, 25, 15, 0.06);
  --shadow-md: 0 4px 16px rgba(30, 25, 15, 0.08);
  --shadow-lg: 0 16px 40px rgba(30, 25, 15, 0.14);
  --mono-bg: #1d1a15;
  --mono-text: #eae6da;
  --mono-accent: #c9c2b4;
  --mono-string: #9fd88a;
  --mono-comment: #7a7566;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --ground: #16140f;
    --surface: #1f1c16;
    --surface-raised: #262219;
    --border: #38332a;
    --border-strong: #4a4436;
    --text: #efece3;
    --text-dim: #a8a190;
    --text-faint: #6f695a;
    --accent: #f0efe9;
    --accent-ink: #16140f;
    --accent-soft: #33312b;
    --good: #4cc98a;
    --warn: #e0a640;
    --bad: #e2685f;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.35);
    --shadow-lg: 0 20px 48px rgba(0, 0, 0, 0.5);
    --mono-bg: #100e0a;
    --mono-text: #eae6da;
    --mono-accent: #cfc9ba;
    --mono-string: #a9e295;
    --mono-comment: #6f695a;
  }
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --ground: #16140f;
  --surface: #1f1c16;
  --surface-raised: #262219;
  --border: #38332a;
  --border-strong: #4a4436;
  --text: #efece3;
  --text-dim: #a8a190;
  --text-faint: #6f695a;
  --accent: #f0efe9;
  --accent-ink: #16140f;
  --accent-soft: #33312b;
  --good: #4cc98a;
  --warn: #e0a640;
  --bad: #e2685f;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.35);
  --shadow-lg: 0 20px 48px rgba(0, 0, 0, 0.5);
  --mono-bg: #100e0a;
  --mono-text: #eae6da;
  --mono-accent: #cfc9ba;
  --mono-string: #a9e295;
  --mono-comment: #6f695a;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }

body {
  background: var(--ground);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Inter', system-ui, sans-serif;
  font-size: 14px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

code, .mono, .mono * {
  font-family: 'SF Mono', 'Cascadia Code', 'JetBrains Mono', ui-monospace, Consolas, monospace;
}

/* ---------- App shell ---------- */
.app {
  display: grid;
  grid-template-columns: 340px 1fr;
  grid-template-rows: 56px 1fr;
  grid-template-areas:
    "topbar topbar"
    "sidebar main";
  height: 100vh;
  width: 100vw;
}

.topbar {
  grid-area: topbar;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
  gap: 16px;
}

.brand { display: flex; align-items: center; gap: 10px; min-width: 0; }

.brand-mark {
  width: 26px;
  height: 26px;
  border-radius: 7px;
  background: linear-gradient(155deg, var(--accent), color-mix(in srgb, var(--accent) 55%, var(--ground)));
  flex-shrink: 0;
  box-shadow: var(--shadow-sm);
}

.brand-name {
  font-family: 'Fraunces', Georgia, serif;
  font-weight: 600;
  font-size: 17px;
  letter-spacing: -0.01em;
  white-space: nowrap;
}

.topbar-actions { display: flex; align-items: center; gap: 8px; }

.seg { display: flex; background: var(--ground); border: 1px solid var(--border); border-radius: 8px; padding: 2px; gap: 2px; }

.seg button {
  border: none;
  background: transparent;
  color: var(--text-dim);
  font-size: 12.5px;
  font-weight: 600;
  padding: 6px 12px;
  border-radius: 6px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: background 0.15s, color 0.15s;
}

.seg button.active { background: var(--surface); color: var(--text); box-shadow: var(--shadow-sm); }

.seg button:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible, [tabindex]:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.icon-btn {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text-dim);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: border-color 0.15s, color 0.15s;
}
.icon-btn:hover { border-color: var(--border-strong); color: var(--text); }

.btn-primary {
  background: var(--accent);
  color: var(--accent-ink);
  border: none;
  border-radius: 8px;
  padding: 8px 14px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
  box-shadow: var(--shadow-sm);
  transition: filter 0.15s, transform 0.1s;
}
.btn-primary:hover { filter: brightness(1.06); }
.btn-primary:active { transform: translateY(1px); }

/* ---------- Sidebar shell ---------- */
.sidebar { grid-area: sidebar; background: var(--surface); border-right: 1px solid var(--border); display: flex; flex-direction: column; min-height: 0; }

.sidebar-mode {
  display: flex;
  gap: 2px;
  padding: 10px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
.sidebar-mode button {
  flex: 1;
  border: none;
  background: var(--ground);
  color: var(--text-dim);
  font-size: 12.5px;
  font-weight: 700;
  padding: 9px 8px;
  border-radius: 7px;
  cursor: pointer;
}
.sidebar-mode button.active { background: var(--accent); color: var(--accent-ink); }

.sidebar-scroll { flex: 1; overflow-y: auto; padding-bottom: 40px; }

.sidebar-intro { padding: 14px 18px 6px; }
.sidebar-intro .eyebrow { font-size: 10.5px; font-weight: 700; letter-spacing: 0.09em; text-transform: uppercase; color: var(--text-faint); }
.sidebar-intro p { margin: 6px 0 0; font-size: 12px; color: var(--text-dim); line-height: 1.5; }

.group { border-bottom: 1px solid var(--border); }
.group-head { width: 100%; display: flex; align-items: center; justify-content: space-between; padding: 13px 18px; background: none; border: none; cursor: pointer; color: var(--text); font-size: 13px; font-weight: 700; }
.group-head .count { font-weight: 500; color: var(--text-faint); font-size: 11px; margin-left: 8px; }
.group-head .chev { color: var(--text-faint); transition: transform 0.18s ease; flex-shrink: 0; }
.group.open .group-head .chev { transform: rotate(90deg); }
.group-body { display: none; padding: 2px 18px 16px; flex-direction: column; gap: 14px; }
.group.open .group-body { display: flex; }

.field { display: flex; flex-direction: column; gap: 6px; }
.field-row { display: flex; align-items: center; justify-content: space-between; gap: 8px; }
.field label { font-size: 12px; color: var(--text-dim); font-weight: 600; }
.field .val { font-size: 11px; color: var(--text-faint); font-variant-numeric: tabular-nums; }

.color-row { display: flex; align-items: center; gap: 8px; }
.swatch-tag { font-size: 11px; font-weight: 600; color: var(--text-dim); white-space: nowrap; flex-shrink: 0; }
.group-note { font-size: 11px; color: var(--text-faint); line-height: 1.5; margin: 0 0 4px; }

.color-row input[type="color"] { width: 30px; height: 30px; border-radius: 7px; border: 1px solid var(--border-strong); padding: 0; cursor: pointer; background: none; flex-shrink: 0; }
.color-row input[type="text"] { flex: 1; min-width: 0; font-family: 'SF Mono', ui-monospace, monospace; font-size: 12px; padding: 6px 8px; border-radius: 6px; border: 1px solid var(--border); background: var(--ground); color: var(--text); }
.color-row input[type="text"]:focus { border-color: var(--accent); outline: none; }

input[type="text"], select {
  width: 100%;
  font-size: 12.5px;
  padding: 7px 8px;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: var(--ground);
  color: var(--text);
  font-family: inherit;
}

input[type="range"] { width: 100%; accent-color: var(--accent); height: 4px; }

.swatch-strip { display: flex; border-radius: 6px; overflow: hidden; height: 20px; border: 1px solid var(--border); margin-top: 6px; }
.swatch-strip div { flex: 1; }
.swatch-strip.ramp { height: 22px; cursor: default; }

.ramp-labels { display: flex; justify-content: space-between; font-size: 9.5px; color: var(--text-faint); font-variant-numeric: tabular-nums; margin-top: 3px; }

.shade-edit-toggle {
  border: none;
  background: none;
  color: var(--text-faint);
  font-size: 11px;
  font-weight: 600;
  cursor: pointer;
  text-decoration: underline;
  text-underline-offset: 2px;
  padding: 0;
  margin-top: 6px;
}
.shade-edit-toggle:hover { color: var(--accent); }

.shade-edit-list { display: flex; flex-direction: column; gap: 6px; margin-top: 8px; }
.shade-edit-list[hidden] { display: none; }
.shade-edit-row { display: flex; align-items: center; gap: 8px; }
.shade-edit-row .shade-label { font-size: 11px; font-family: 'SF Mono', ui-monospace, monospace; color: var(--text-dim); flex-shrink: 0; }
.shade-edit-row input[type="color"] { width: 26px; height: 26px; border-radius: 6px; border: 1px solid var(--border-strong); padding: 0; cursor: pointer; background: none; flex-shrink: 0; }
.shade-edit-row input[type="text"] { flex: 1; min-width: 0; font-family: 'SF Mono', ui-monospace, monospace; font-size: 11px; padding: 5px 7px; border-radius: 6px; border: 1px solid var(--border); background: var(--ground); color: var(--text); }
.shade-edit-row input[type="text"]:focus { border-color: var(--accent); outline: none; }
.shade-edit-row .shade-reset {
  border: none;
  background: none;
  color: var(--text-faint);
  font-size: 13px;
  line-height: 1;
  cursor: pointer;
  padding: 4px;
  flex-shrink: 0;
  visibility: hidden;
}
.shade-edit-row.is-overridden .shade-reset { visibility: visible; }
.shade-edit-row.is-overridden .shade-label { color: var(--accent); }
.shade-edit-row .shade-reset:hover { color: var(--bad); }

.scale-preview { display: flex; align-items: flex-end; gap: 6px; height: 44px; margin-top: 2px; }
.scale-preview div { background: var(--accent-soft); border: 1px solid var(--border-strong); flex: 1; }
.scale-preview:not(.radius) div { border-radius: 3px; }
.scale-preview.radius div { height: 30px !important; background: var(--surface); }

.reset-link { padding: 14px 18px 6px; font-size: 12px; color: var(--text-faint); cursor: pointer; text-decoration: underline; text-underline-offset: 2px; }
.reset-link:hover { color: var(--bad); }

/* ---------- Component config panels ---------- */
.cmp-tab-list { display: flex; flex-wrap: wrap; gap: 6px; padding: 14px 18px; border-bottom: 1px solid var(--border); }
.cmp-tab { border: 1px solid var(--border); background: var(--ground); color: var(--text-dim); font-size: 11.5px; font-weight: 700; padding: 6px 11px; border-radius: 999px; cursor: pointer; }
.cmp-tab.active { border-color: var(--accent); color: var(--accent); background: var(--accent-soft); }

.cmp-panel-body { padding: 14px 18px 20px; }
.cmp-panel-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 12px; }
.cmp-panel-head span { font-size: 13px; font-weight: 700; color: var(--text); }
.cmp-reset { border: none; background: none; color: var(--text-faint); font-size: 11px; cursor: pointer; text-decoration: underline; text-underline-offset: 2px; }
.cmp-reset:hover { color: var(--bad); }

.cmp-variant { border: 1px solid var(--border); border-radius: 10px; padding: 12px 12px 2px; margin-bottom: 12px; background: var(--ground); }
.cmp-variant-label { font-size: 10.5px; font-weight: 700; letter-spacing: 0.06em; text-transform: uppercase; color: var(--text-faint); margin-bottom: 10px; }

.cmp-row { margin-bottom: 12px; }
.cmp-row label { display: block; font-size: 12px; font-weight: 600; color: var(--text-dim); margin-bottom: 5px; }
.cmp-control { display: flex; align-items: center; gap: 8px; }
.cmp-swatch { width: 22px; height: 22px; border-radius: 6px; border: 1px solid var(--border-strong); flex-shrink: 0; }
.cmp-swatch--transparent {
  background-image:
    linear-gradient(45deg, var(--border) 25%, transparent 25%), linear-gradient(-45deg, var(--border) 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, var(--border) 75%), linear-gradient(-45deg, transparent 75%, var(--border) 75%);
  background-size: 8px 8px;
  background-position: 0 0, 0 4px, 4px -4px, -4px 0;
}
.cmp-select { flex: 1; }

/* ---------- CSS drawer ---------- */
.drawer { border-top: 1px solid var(--border); background: var(--mono-bg); color: var(--mono-text); flex-shrink: 0; display: flex; flex-direction: column; max-height: 46vh; }
.drawer-head { display: flex; align-items: center; justify-content: space-between; padding: 10px 18px; cursor: pointer; flex-shrink: 0; }
.drawer-head .left { display: flex; align-items: center; gap: 10px; }
.drawer-head .title { font-size: 12.5px; font-weight: 700; letter-spacing: 0.02em; }
.drawer-head .hint { font-size: 11px; color: var(--mono-comment); }

.drawer-toggle { display: flex; align-items: center; gap: 6px; background: rgba(255,255,255,0.08); border: 1px solid rgba(255,255,255,0.14); color: var(--mono-text); font-size: 11.5px; font-weight: 600; padding: 6px 10px; border-radius: 6px; cursor: pointer; }
.drawer-toggle:hover { background: rgba(255,255,255,0.14); }
.drawer-toggle .chev { transition: transform 0.2s ease; color: var(--mono-comment); flex-shrink: 0; }
.drawer.open .drawer-toggle .chev { transform: rotate(180deg); }
.drawer:not(.open) .drawer-body { display: none; }
.drawer:not(.open) .copy-btn { display: none; }

.copy-btn { background: rgba(255,255,255,0.08); border: 1px solid rgba(255,255,255,0.14); color: var(--mono-text); font-size: 11.5px; font-weight: 600; padding: 6px 12px; border-radius: 6px; cursor: pointer; display: flex; align-items: center; gap: 6px; }
.copy-btn:hover { background: rgba(255,255,255,0.14); }
.copy-btn.copied { background: color-mix(in srgb, var(--good) 30%, transparent); border-color: var(--good); }

.drawer-body { flex: 1; overflow: auto; padding: 0 18px 18px; font-size: 12.5px; line-height: 1.7; white-space: pre; }

.cm-sel { color: var(--mono-text); }
.cm-prop { color: var(--mono-accent); }
.cm-val { color: var(--mono-string); }
.cm-comment { color: var(--mono-comment); }
.cm-punct { color: var(--mono-comment); }

::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-thumb { background: var(--border-strong); border-radius: 6px; }
::-webkit-scrollbar-track { background: transparent; }

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
}

@media (max-width: 860px) {
  .app { grid-template-columns: 1fr; grid-template-areas: "topbar" "main"; }
  .sidebar { position: fixed; top: 56px; left: 0; bottom: 0; width: min(340px, 90vw); z-index: 40; transform: translateX(-100%); transition: transform 0.2s ease; box-shadow: var(--shadow-lg); }
  .sidebar.mobile-open { transform: translateX(0); }
  .scrim { position: fixed; inset: 56px 0 0 0; background: rgba(0,0,0,0.35); z-index: 30; display: none; }
  .scrim.show { display: block; }
  .brand-name { display: none; }
}