/* ============================================================================
   MAGMA — UI Design Tool
   Vanilla HTML/CSS/JS. No build step, no framework.
   ============================================================================ */

/* ---------------------------------------------------------------------------
   1. META DESIGN TOKENS (the tool styles itself with its own system)
   --------------------------------------------------------------------------- */
:root {
  /* Surfaces */
  --app-bg:        #0a0a0c;
  --toolbar-bg:    #111318;
  --panel-bg:      #0f1219;
  --canvas-bg:     #1a1f2a;
  --card-bg:       #151b24;
  --elevated-bg:   #1a212c;
  --input-bg:      #0c0f15;

  /* Accent */
  --accent:        #2dd4bf;
  --accent-dim:    #0d9488;
  --accent-soft:   rgba(45, 212, 191, 0.12);
  --accent-glow:   rgba(45, 212, 191, 0.35);

  /* Semantic */
  --success:       #34d399;
  --warning:       #fbbf24;
  --error:         #f87171;
  --info:          #60a5fa;

  /* Text */
  --text-1:        #e2e8f0;
  --text-2:        #94a3b8;
  --text-3:        #64748b;
  --text-on-accent:#04201c;

  /* Lines */
  --border:        #1e293b;
  --border-soft:   #161e2b;
  --border-strong: #2b3a4f;
  --hover:         #1e2a38;

  /* Typography */
  --font-display:  Georgia, "Times New Roman", serif;
  --font-body:     system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono:     ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;

  /* Radii */
  --r-sm: 5px;
  --r-md: 8px;
  --r-lg: 12px;
  --r-xl: 16px;

  /* Shadows */
  --sh-sm: 0 1px 2px rgba(0,0,0,.4);
  --sh-md: 0 4px 12px rgba(0,0,0,.4);
  --sh-lg: 0 12px 40px rgba(0,0,0,.55);
  --sh-pop: 0 8px 30px rgba(0,0,0,.6), 0 0 0 1px var(--border-strong);

  /* Layout */
  --toolbar-h: 48px;
  --left-w: 264px;
  --right-w: 332px;

  /* Motion */
  --ease: cubic-bezier(.4, 0, .2, 1);
  --fast: 120ms var(--ease);
  --med: 200ms var(--ease);
}

/* ---------------------------------------------------------------------------
   2. RESET & BASE
   --------------------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; padding: 0; }

html, body { height: 100%; }
body {
  font-family: var(--font-body);
  font-size: 13px;
  line-height: 1.5;
  color: var(--text-1);
  background: var(--app-bg);
  overflow: hidden;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

button { font: inherit; color: inherit; background: none; border: none; cursor: pointer; }
input, select, textarea { font: inherit; color: inherit; }
::selection { background: var(--accent-glow); color: #fff; }

/* Scrollbars */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border-strong); border-radius: 6px; border: 2px solid transparent; background-clip: padding-box; }
::-webkit-scrollbar-thumb:hover { background: #3a4d66; background-clip: padding-box; }

.mono { font-family: var(--font-mono); }
.serif { font-family: var(--font-display); }

/* ---------------------------------------------------------------------------
   3. APP SHELL
   --------------------------------------------------------------------------- */
#app {
  display: grid;
  grid-template-rows: var(--toolbar-h) 1fr;
  height: 100vh;
  width: 100vw;
}

.workspace {
  display: grid;
  grid-template-columns: var(--left-w) 1fr var(--right-w);
  min-height: 0;
  transition: grid-template-columns var(--med);
}
.workspace.left-collapsed  { grid-template-columns: 0 1fr var(--right-w); }
.workspace.right-collapsed { grid-template-columns: var(--left-w) 1fr 0; }
.workspace.left-collapsed.right-collapsed { grid-template-columns: 0 1fr 0; }

/* ---------------------------------------------------------------------------
   4. TOOLBAR
   --------------------------------------------------------------------------- */
.toolbar {
  display: flex;
  align-items: center;
  gap: 4px;
  height: var(--toolbar-h);
  padding: 0 12px;
  background: var(--toolbar-bg);
  border-bottom: 1px solid var(--border);
  user-select: none;
  z-index: 100;
}
.brand {
  display: flex;
  align-items: center;
  gap: 9px;
  padding-right: 14px;
  margin-right: 6px;
  border-right: 1px solid var(--border);
  height: 100%;
}
.brand-mark {
  width: 26px; height: 26px;
  border-radius: 7px;
  background: linear-gradient(135deg, var(--accent), var(--accent-dim));
  display: grid; place-items: center;
  font-family: var(--font-display);
  font-size: 17px;
  color: var(--text-on-accent);
  box-shadow: 0 0 16px var(--accent-soft);
  font-style: italic;
}
.brand-name {
  font-family: var(--font-display);
  font-size: 20px;
  letter-spacing: .3px;
  color: var(--text-1);
}
.brand-name em { color: var(--accent); font-style: italic; }

.mode-tabs { display: flex; gap: 2px; height: 100%; align-items: center; }
.mode-tab {
  display: flex; align-items: center; gap: 7px;
  padding: 7px 13px;
  border-radius: var(--r-md);
  color: var(--text-2);
  font-weight: 500;
  font-size: 12.5px;
  transition: all var(--fast);
  position: relative;
}
.mode-tab:hover { background: var(--hover); color: var(--text-1); }
.mode-tab.active { background: var(--accent-soft); color: var(--accent); }
.mode-tab svg { width: 15px; height: 15px; }

.toolbar-spacer { flex: 1; }

.toolbar-actions { display: flex; align-items: center; gap: 6px; }
.icon-btn {
  width: 32px; height: 32px;
  display: grid; place-items: center;
  border-radius: var(--r-md);
  color: var(--text-2);
  transition: all var(--fast);
}
.icon-btn:hover { background: var(--hover); color: var(--text-1); }
.icon-btn:disabled { opacity: .3; cursor: default; }
.icon-btn:disabled:hover { background: none; color: var(--text-2); }
.icon-btn svg { width: 16px; height: 16px; }
.icon-btn.active { color: var(--accent); background: var(--accent-soft); }

.btn {
  display: inline-flex; align-items: center; gap: 7px;
  padding: 7px 14px;
  border-radius: var(--r-md);
  font-weight: 600;
  font-size: 12.5px;
  transition: all var(--fast);
  white-space: nowrap;
}
.btn svg { width: 14px; height: 14px; }
.btn-primary { background: var(--accent); color: var(--text-on-accent); }
.btn-primary:hover { background: #34e0cb; box-shadow: 0 0 18px var(--accent-soft); }
.btn-ghost { background: var(--elevated-bg); color: var(--text-1); border: 1px solid var(--border); }
.btn-ghost:hover { background: var(--hover); border-color: var(--border-strong); }
.btn-sm { padding: 5px 10px; font-size: 11.5px; }
.btn-danger { color: var(--error); }
.btn-danger:hover { background: rgba(248,113,113,.12); }

/* ---------------------------------------------------------------------------
   5. PANELS (shared)
   --------------------------------------------------------------------------- */
.panel {
  background: var(--panel-bg);
  display: flex;
  flex-direction: column;
  min-height: 0;
  overflow: hidden;
}
.panel-left  { border-right: 1px solid var(--border); }
.panel-right { border-left: 1px solid var(--border); }
.workspace.left-collapsed .panel-left,
.workspace.right-collapsed .panel-right { opacity: 0; pointer-events: none; }

.panel-head {
  display: flex; align-items: center; justify-content: space-between;
  padding: 11px 14px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
  min-height: 44px;
}
.panel-title {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .9px;
  text-transform: uppercase;
  color: var(--text-2);
}
.panel-body { flex: 1; overflow-y: auto; overflow-x: hidden; }
.panel-body.pad { padding: 12px; }

/* Collapsible section */
.section { border-bottom: 1px solid var(--border-soft); }
.section-head {
  display: flex; align-items: center; justify-content: space-between;
  width: 100%;
  padding: 10px 14px;
  user-select: none;
  transition: background var(--fast);
}
.section-head:hover { background: rgba(255,255,255,.02); }
.section-head .twirl {
  width: 14px; height: 14px; color: var(--text-3);
  transition: transform var(--fast);
  flex-shrink: 0;
}
.section.collapsed .twirl { transform: rotate(-90deg); }
.section-head .title {
  font-size: 11px; font-weight: 700; letter-spacing: .7px;
  text-transform: uppercase; color: var(--text-2);
  flex: 1; text-align: left; margin-left: 8px;
}
.section-head .count {
  font-size: 10px; color: var(--text-3); font-family: var(--font-mono);
  background: var(--input-bg); padding: 1px 6px; border-radius: 10px;
}
.section-body { padding: 4px 14px 14px; }
.section.collapsed .section-body { display: none; }

/* ---------------------------------------------------------------------------
   6. FORM CONTROLS
   --------------------------------------------------------------------------- */
.field { margin-bottom: 10px; }
.field:last-child { margin-bottom: 0; }
.field-label {
  display: block;
  font-size: 10.5px;
  font-weight: 600;
  color: var(--text-2);
  margin-bottom: 5px;
  letter-spacing: .3px;
}
.field-row { display: flex; gap: 6px; align-items: center; }
.field-grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 6px; }
.field-grid-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 6px; }
.field-grid-4 { display: grid; grid-template-columns: repeat(4,1fr); gap: 5px; }

.input, .select, .textarea {
  width: 100%;
  background: var(--input-bg);
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  padding: 7px 9px;
  font-size: 12px;
  color: var(--text-1);
  transition: border-color var(--fast), box-shadow var(--fast);
  font-family: var(--font-body);
}
.input.mono, .textarea.mono { font-family: var(--font-mono); font-size: 11.5px; }
.input:focus, .select:focus, .textarea:focus {
  outline: none;
  border-color: var(--accent-dim);
  box-shadow: 0 0 0 3px var(--accent-soft);
}
.input::placeholder, .textarea::placeholder { color: var(--text-3); }
.input:disabled { opacity: .5; }
.select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%2364748b' stroke-width='2.5'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 8px center;
  padding-right: 26px;
  cursor: pointer;
}
.select option { background: var(--elevated-bg); }
.textarea { resize: vertical; min-height: 60px; line-height: 1.5; }

.input-unit {
  display: flex; align-items: stretch;
  background: var(--input-bg);
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  overflow: hidden;
  transition: border-color var(--fast), box-shadow var(--fast);
}
.input-unit:focus-within { border-color: var(--accent-dim); box-shadow: 0 0 0 3px var(--accent-soft); }
.input-unit input { flex: 1; min-width: 0; background: none; border: none; padding: 7px 9px; font-size: 12px; font-family: var(--font-mono); }
.input-unit input:focus { outline: none; }
.input-unit select {
  background: var(--elevated-bg); border: none; border-left: 1px solid var(--border);
  padding: 0 4px; font-size: 11px; color: var(--text-2); cursor: pointer;
  appearance: none; text-align: center; min-width: 42px;
}
.input-unit select:focus { outline: none; }

/* Range slider */
input[type="range"] {
  -webkit-appearance: none; appearance: none;
  width: 100%; height: 4px;
  background: var(--border-strong);
  border-radius: 4px; cursor: pointer;
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none; appearance: none;
  width: 14px; height: 14px; border-radius: 50%;
  background: var(--accent); cursor: pointer;
  box-shadow: 0 0 0 3px var(--app-bg), 0 0 8px var(--accent-soft);
  transition: transform var(--fast);
}
input[type="range"]::-webkit-slider-thumb:hover { transform: scale(1.2); }
input[type="range"]::-moz-range-thumb {
  width: 14px; height: 14px; border-radius: 50%; border: none;
  background: var(--accent); cursor: pointer;
}

/* Contrast checker */
.contrast-box { background: var(--input-bg); border: 1px solid var(--border); border-radius: var(--r-sm); padding: 10px; }
.contrast-preview {
  display: flex; align-items: center; justify-content: center; gap: 8px;
  height: 56px; border-radius: var(--r-sm); margin-bottom: 8px; font-weight: 600;
  border: 1px solid var(--border-soft);
}
.contrast-preview .sample-lg { font-size: 17px; }
.contrast-preview .sample-sm { font-size: 12px; }
.contrast-row { display: flex; align-items: center; gap: 6px; margin-bottom: 6px; }
.contrast-ratio { font-family: var(--font-mono); font-size: 15px; font-weight: 700; color: var(--text-1); }
.wcag-badge {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 2px 7px; border-radius: 5px; font-size: 10px; font-weight: 700; letter-spacing: .3px;
  font-family: var(--font-mono);
}
.wcag-badge.pass { background: rgba(52,211,153,.15); color: var(--success); }
.wcag-badge.fail { background: rgba(248,113,113,.13); color: var(--error); }
.wcag-badge svg { width: 11px; height: 11px; }

/* Color input swatch */
.color-swatch-input {
  position: relative;
  width: 30px; height: 30px;
  border-radius: var(--r-sm);
  border: 1px solid var(--border-strong);
  overflow: hidden;
  flex-shrink: 0;
  cursor: pointer;
  background-image:
    linear-gradient(45deg, #2a2a2a 25%, transparent 25%),
    linear-gradient(-45deg, #2a2a2a 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, #2a2a2a 75%),
    linear-gradient(-45deg, transparent 75%, #2a2a2a 75%);
  background-size: 8px 8px;
  background-position: 0 0, 0 4px, 4px -4px, -4px 0;
}
.color-swatch-input .fill { position: absolute; inset: 0; }
.color-swatch-input input[type="color"] {
  position: absolute; inset: -4px; width: calc(100% + 8px); height: calc(100% + 8px);
  opacity: 0; cursor: pointer; border: none;
}

/* Toggle / Segmented */
.segmented {
  display: inline-flex;
  background: var(--input-bg);
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  padding: 2px;
  gap: 2px;
}
.segmented.full { display: flex; width: 100%; }
.seg {
  flex: 1;
  padding: 5px 9px;
  border-radius: 4px;
  font-size: 11px;
  font-weight: 500;
  color: var(--text-2);
  text-align: center;
  white-space: nowrap;
  transition: all var(--fast);
}
.seg:hover { color: var(--text-1); }
.seg.active { background: var(--accent-soft); color: var(--accent); }
.seg svg { width: 13px; height: 13px; display: block; margin: 0 auto; }

.switch {
  position: relative;
  width: 34px; height: 19px;
  background: var(--border-strong);
  border-radius: 10px;
  transition: background var(--fast);
  flex-shrink: 0;
}
.switch.on { background: var(--accent-dim); }
.switch::after {
  content: ""; position: absolute; top: 2px; left: 2px;
  width: 15px; height: 15px; border-radius: 50%;
  background: #fff; transition: transform var(--fast);
}
.switch.on::after { transform: translateX(15px); }

/* Chips */
.chip {
  display: inline-flex; align-items: center; gap: 5px;
  padding: 2px 8px;
  background: var(--input-bg);
  border: 1px solid var(--border);
  border-radius: 20px;
  font-size: 10.5px;
  color: var(--text-2);
}
.chip .x { cursor: pointer; opacity: .6; }
.chip .x:hover { opacity: 1; color: var(--error); }

/* ---------------------------------------------------------------------------
   7. LEFT PANEL — LIBRARY
   --------------------------------------------------------------------------- */
.search-box {
  display: flex; align-items: center; gap: 8px;
  background: var(--input-bg);
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  padding: 6px 10px;
  margin: 12px;
  transition: border-color var(--fast);
}
.search-box:focus-within { border-color: var(--accent-dim); }
.search-box svg { width: 14px; height: 14px; color: var(--text-3); flex-shrink: 0; }
.search-box input { flex: 1; background: none; border: none; font-size: 12px; }
.search-box input:focus { outline: none; }

/* List rows (tokens, components, pages) */
.lib-list { display: flex; flex-direction: column; }
.lib-row {
  display: flex; align-items: center; gap: 9px;
  padding: 8px 14px;
  cursor: pointer;
  transition: background var(--fast);
  position: relative;
  user-select: none;
}
.lib-row:hover { background: var(--hover); }
.lib-row.selected { background: var(--accent-soft); }
.lib-row.selected::before {
  content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 2px;
  background: var(--accent);
}
.lib-row .swatch {
  width: 16px; height: 16px; border-radius: 4px; flex-shrink: 0;
  border: 1px solid rgba(255,255,255,.12);
}
.lib-row .ico { width: 15px; height: 15px; color: var(--text-3); flex-shrink: 0; }
.lib-row.selected .ico { color: var(--accent); }
.lib-row .label { flex: 1; min-width: 0; font-size: 12px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.lib-row .meta { font-size: 10px; color: var(--text-3); font-family: var(--font-mono); }
.lib-row .row-actions {
  display: flex; gap: 2px; flex-shrink: 0;
  opacity: 0; visibility: hidden;
  transition: opacity var(--fast);
}
.lib-row:hover .row-actions,
.lib-row:focus-within .row-actions { opacity: 1; visibility: visible; }
.lib-row .row-actions .icon-btn { width: 22px; height: 22px; }
.lib-row .row-actions .icon-btn svg { width: 13px; height: 13px; }

.lib-row.dragging { opacity: .4; }
.lib-row.drop-above::after { content:""; position:absolute; top:-1px; left:8px; right:8px; height:2px; background: var(--accent); border-radius: 2px; }
.lib-row.drop-below::after { content:""; position:absolute; bottom:-1px; left:8px; right:8px; height:2px; background: var(--accent); border-radius: 2px; }

.lib-group-head {
  display: flex; align-items: center; justify-content: space-between;
  padding: 9px 14px 5px;
  font-size: 10px; font-weight: 700; letter-spacing: .8px;
  text-transform: uppercase; color: var(--text-3);
  user-select: none;
}
.lib-group-head .add { cursor: pointer; opacity: .7; transition: opacity var(--fast), color var(--fast); }
.lib-group-head .add:hover { opacity: 1; color: var(--accent); }
.lib-group-head .add svg { width: 14px; height: 14px; display: block; }

/* Component tree */
.tree { padding: 4px 0; }
.tree-node {
  display: flex; align-items: center; gap: 6px;
  padding: 5px 8px 5px 0;
  cursor: pointer; border-radius: var(--r-sm);
  font-size: 12px; user-select: none;
  position: relative;
}
.tree-node:hover { background: var(--hover); }
.tree-node.selected { background: var(--accent-soft); color: var(--accent); }
.tree-node .twirl { width: 13px; height: 13px; color: var(--text-3); flex-shrink: 0; transition: transform var(--fast); }
.tree-node .twirl.hidden { visibility: hidden; }
.tree-node.collapsed > .twirl { transform: rotate(-90deg); }
.tree-node .type-ico { width: 14px; height: 14px; flex-shrink: 0; color: var(--text-3); }
.tree-node.selected .type-ico { color: var(--accent); }
.tree-node .name { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.tree-node .tag { font-size: 9px; font-family: var(--font-mono); color: var(--text-3); opacity: .7; }
.tree-children { margin-left: 14px; border-left: 1px solid var(--border-soft); }
.tree-node.drop-target { box-shadow: inset 0 0 0 1px var(--accent); }
.tree-node.drop-above::before { content:""; position:absolute; top:0; left:0; right:0; height:2px; background:var(--accent); }
.tree-node.drop-below::before { content:""; position:absolute; bottom:0; left:0; right:0; height:2px; background:var(--accent); }

/* ---------------------------------------------------------------------------
   8. CANVAS
   --------------------------------------------------------------------------- */
.canvas-wrap { display: flex; flex-direction: column; min-width: 0; min-height: 0; background: var(--canvas-bg); }
.canvas-toolbar {
  display: flex; align-items: center; gap: 10px;
  padding: 9px 16px;
  background: var(--toolbar-bg);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
  min-height: 46px;
  overflow-x: auto;
}
.canvas-toolbar .label { font-size: 11px; color: var(--text-3); font-weight: 600; }
.canvas-toolbar .sep { width: 1px; height: 20px; background: var(--border); }

.canvas {
  flex: 1; overflow: auto; position: relative;
  background-color: var(--canvas-bg);
  background-image:
    radial-gradient(circle at 1px 1px, rgba(148,163,184,.07) 1px, transparent 0);
  background-size: 22px 22px;
}
.canvas-inner { padding: 28px; min-height: 100%; }

/* Card grid */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 22px;
  align-items: start;
}

.comp-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  overflow: hidden;
  transition: border-color var(--fast), box-shadow var(--fast);
  display: flex; flex-direction: column;
}
.comp-card:hover { border-color: var(--border-strong); }
.comp-card.selected { border-color: var(--accent-dim); box-shadow: 0 0 0 1px var(--accent-dim), 0 0 24px var(--accent-soft); }

.comp-card-head {
  display: flex; align-items: center; gap: 8px;
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
  cursor: pointer;
}
.comp-card-head .type-ico { width: 15px; height: 15px; color: var(--accent); flex-shrink: 0; }
.comp-card-head .name { flex: 1; font-size: 13px; font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.comp-card-head .name .grp { color: var(--text-3); font-weight: 400; }
.comp-card-head .ctrls { display: flex; gap: 2px; }

.comp-card-preview {
  position: relative;
  min-height: 150px;
  display: flex; align-items: center; justify-content: center;
  transition: background var(--med);
}
.comp-card-preview.bg-dark  { background: #0d1117; }
.comp-card-preview.bg-light { background: #f8fafc; }
.comp-card-preview.bg-grid {
  background-color: #0d1117;
  background-image:
    linear-gradient(rgba(255,255,255,.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.04) 1px, transparent 1px);
  background-size: 16px 16px;
}
.comp-card-preview iframe { width: 100%; height: 100%; min-height: 150px; border: none; display: block; }

.comp-card-foot {
  padding: 9px 12px;
  border-top: 1px solid var(--border);
  display: flex; flex-direction: column; gap: 8px;
}
.variant-tabs { display: flex; flex-wrap: wrap; gap: 4px; align-items: center; }
.variant-tabs .vt-label { font-size: 9.5px; color: var(--text-3); text-transform: uppercase; letter-spacing: .5px; font-weight: 700; margin-right: 2px; }
.vt {
  padding: 3px 9px;
  font-size: 11px;
  border-radius: 5px;
  background: var(--input-bg);
  color: var(--text-2);
  border: 1px solid var(--border);
  transition: all var(--fast);
}
.vt:hover { color: var(--text-1); border-color: var(--border-strong); }
.vt.active { background: var(--accent-soft); color: var(--accent); border-color: var(--accent-dim); }

/* Empty state */
.empty-state {
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  padding: 80px 24px; text-align: center; color: var(--text-3);
  height: 100%;
}
.empty-state .icon {
  width: 64px; height: 64px; margin-bottom: 18px;
  display: grid; place-items: center;
  border-radius: var(--r-xl);
  background: var(--card-bg);
  border: 1px solid var(--border);
}
.empty-state .icon svg { width: 30px; height: 30px; color: var(--text-3); }
.empty-state h3 { font-family: var(--font-display); font-size: 24px; color: var(--text-1); font-weight: 400; margin-bottom: 8px; }
.empty-state p { font-size: 13px; max-width: 360px; line-height: 1.6; margin-bottom: 20px; }

/* ---------------------------------------------------------------------------
   9. TOKEN EDITOR (canvas content)
   --------------------------------------------------------------------------- */
.token-canvas { max-width: 1100px; margin: 0 auto; }
.token-section { margin-bottom: 36px; }
.token-section-head {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 16px; padding-bottom: 10px;
  border-bottom: 1px solid var(--border);
}
.token-section-head .ts-title {
  display: flex; align-items: center; gap: 10px;
  font-family: var(--font-display); font-size: 22px; color: var(--text-1); font-weight: 400;
}
.token-section-head .ts-title .ts-ico { width: 18px; height: 18px; color: var(--accent); }
.token-section-head .ts-title .ts-prefix { font-family: var(--font-mono); font-size: 12px; color: var(--text-3); background: var(--card-bg); padding: 3px 8px; border-radius: 5px; }

/* Color tokens */
.color-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 12px; }
.color-tile {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  overflow: hidden;
  transition: all var(--fast);
  cursor: pointer;
}
.color-tile:hover { border-color: var(--border-strong); transform: translateY(-2px); box-shadow: var(--sh-md); }
.color-tile.selected { border-color: var(--accent-dim); box-shadow: 0 0 0 1px var(--accent-dim); }
.color-tile .preview {
  height: 72px; position: relative;
  background-image:
    linear-gradient(45deg, #2a2a2a 25%, transparent 25%),
    linear-gradient(-45deg, #2a2a2a 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, #2a2a2a 75%),
    linear-gradient(-45deg, transparent 75%, #2a2a2a 75%);
  background-size: 12px 12px; background-position: 0 0, 0 6px, 6px -6px, -6px 0;
}
.color-tile .preview .fill { position: absolute; inset: 0; }
.color-tile .info { padding: 8px 10px; }
.color-tile .info .name { font-size: 12px; font-weight: 600; color: var(--text-1); margin-bottom: 2px; display: flex; align-items: center; gap: 5px; }
.color-tile .info .name .alias-badge { font-size: 8px; background: var(--accent-soft); color: var(--accent); padding: 1px 5px; border-radius: 4px; font-weight: 700; }
.color-tile .info .val { font-size: 10.5px; color: var(--text-3); font-family: var(--font-mono); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* Spacing tokens */
.spacing-list { display: flex; flex-direction: column; gap: 6px; }
.spacing-row {
  display: grid; grid-template-columns: 90px 1fr 70px auto; gap: 12px; align-items: center;
  padding: 8px 12px; background: var(--card-bg); border: 1px solid var(--border); border-radius: var(--r-md);
  transition: border-color var(--fast); cursor: pointer;
}
.spacing-row:hover { border-color: var(--border-strong); }
.spacing-row.selected { border-color: var(--accent-dim); }
.spacing-row .sp-name { font-family: var(--font-mono); font-size: 12px; color: var(--text-1); }
.spacing-row .sp-bar-track { height: 18px; display: flex; align-items: center; }
.spacing-row .sp-bar { height: 18px; background: linear-gradient(90deg, var(--accent), var(--accent-dim)); border-radius: 3px; min-width: 2px; box-shadow: 0 0 12px var(--accent-soft); }
.spacing-row .sp-val { font-family: var(--font-mono); font-size: 12px; color: var(--text-2); text-align: right; }

.token-dragging { opacity: .42; }
.token-drop-above,
.token-drop-below {
  border-color: var(--accent-dim) !important;
  box-shadow: 0 0 0 1px var(--accent-dim), 0 0 18px var(--accent-soft);
}
.token-drop-above { transform: translateY(-2px); }
.token-drop-below { transform: translateY(2px); }

/* Radius tokens */
.radius-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); gap: 12px; }
.radius-tile {
  background: var(--card-bg); border: 1px solid var(--border); border-radius: var(--r-md);
  padding: 14px; text-align: center; cursor: pointer; transition: border-color var(--fast);
}
.radius-tile:hover { border-color: var(--border-strong); }
.radius-tile.selected { border-color: var(--accent-dim); }
.radius-tile .demo {
  height: 60px; background: linear-gradient(135deg, var(--accent-soft), transparent);
  border: 1.5px solid var(--accent-dim); margin-bottom: 10px;
}
.radius-tile .name { font-family: var(--font-mono); font-size: 11px; color: var(--text-1); }
.radius-tile .val { font-size: 10px; color: var(--text-3); font-family: var(--font-mono); }

/* Shadow tokens */
.shadow-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 16px; }
.shadow-tile {
  background: var(--card-bg); border: 1px solid var(--border); border-radius: var(--r-md);
  padding: 24px 16px 14px; cursor: pointer; transition: border-color var(--fast);
}
.shadow-tile:hover { border-color: var(--border-strong); }
.shadow-tile.selected { border-color: var(--accent-dim); }
.shadow-tile .demo { height: 56px; background: #232b38; border-radius: var(--r-md); margin-bottom: 16px; }
.shadow-tile .name { font-family: var(--font-mono); font-size: 11px; color: var(--text-1); text-align: center; }

/* Typography tokens */
.type-list { display: flex; flex-direction: column; gap: 10px; }
.type-tile {
  background: var(--card-bg); border: 1px solid var(--border); border-radius: var(--r-md);
  padding: 14px 16px; cursor: pointer; transition: border-color var(--fast);
}
.type-tile:hover { border-color: var(--border-strong); }
.type-tile.selected { border-color: var(--accent-dim); }
.type-tile .meta { display: flex; align-items: center; gap: 8px; margin-bottom: 8px; flex-wrap: wrap; }
.type-tile .meta .name { font-size: 12px; font-weight: 600; color: var(--text-1); }
.type-tile .meta .spec { font-size: 10px; font-family: var(--font-mono); color: var(--text-3); }
.type-tile .preview-text { color: var(--text-1); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.font-fam-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px,1fr)); gap: 12px; margin-bottom: 24px; }
.font-fam-tile { background: var(--card-bg); border: 1px solid var(--border); border-radius: var(--r-md); padding: 16px; }
.font-fam-tile .role { font-size: 10px; text-transform: uppercase; letter-spacing: .8px; color: var(--accent); font-weight: 700; margin-bottom: 6px; }
.font-fam-tile .sample { font-size: 30px; line-height: 1.2; color: var(--text-1); margin-bottom: 8px; }
.font-fam-tile .stack { font-size: 11px; font-family: var(--font-mono); color: var(--text-3); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* ---------------------------------------------------------------------------
   10. INSPECTOR (right panel)
   --------------------------------------------------------------------------- */
.insp-empty { padding: 50px 24px; text-align: center; color: var(--text-3); }
.insp-empty svg { width: 32px; height: 32px; margin-bottom: 12px; opacity: .5; }

.insp-header { padding: 14px; border-bottom: 1px solid var(--border); }
.insp-header .ih-top { display: flex; align-items: center; gap: 8px; margin-bottom: 4px; }
.insp-header .ih-type-ico { width: 16px; height: 16px; color: var(--accent); }
.insp-header .ih-type { font-size: 10px; text-transform: uppercase; letter-spacing: .8px; color: var(--text-3); font-weight: 700; }
.insp-header .ih-name {
  width: 100%; background: none; border: none; font-size: 16px; font-weight: 600; color: var(--text-1);
  padding: 2px 0; font-family: var(--font-display);
}
.insp-header .ih-name:focus { outline: none; border-bottom: 1px solid var(--accent); }

.box-model {
  margin: 6px auto 10px; max-width: 260px;
  font-family: var(--font-mono); font-size: 9px;
  position: relative; text-align: center;
}
.bm-layer { border: 1px dashed; border-radius: 4px; position: relative; padding: 16px; }
.bm-margin { border-color: #f9a8d4; background: rgba(249,168,212,.05); }
.bm-border { border-color: #fcd34d; background: rgba(252,211,77,.06); margin: 12px; }
.bm-padding { border-color: #86efac; background: rgba(134,239,172,.07); }
.bm-content { background: rgba(96,165,250,.12); border: 1px solid #60a5fa; padding: 14px 8px; border-radius: 3px; color: var(--text-1); }
.bm-label { position: absolute; top: 1px; left: 5px; color: var(--text-3); font-size: 8px; letter-spacing: .5px; }
.bm-val { position: absolute; color: var(--text-2); font-size: 9px; }
.bm-val.t { top: 1px; left: 50%; transform: translateX(-50%); }
.bm-val.b { bottom: 1px; left: 50%; transform: translateX(-50%); }
.bm-val.l { left: 3px; top: 50%; transform: translateY(-50%); }
.bm-val.r { right: 3px; top: 50%; transform: translateY(-50%); }
.bm-val input {
  width: 30px; background: none; border: none; color: var(--text-1); text-align: center;
  font-family: var(--font-mono); font-size: 9px;
}
.bm-val input:focus { outline: none; color: var(--accent); }

/* Token picker popover */
.tokpick-trigger {
  width: 24px; height: 24px; border-radius: var(--r-sm);
  border: 1px solid var(--border-strong);
  display: grid; place-items: center; flex-shrink: 0;
  background: var(--input-bg); position: relative;
  transition: border-color var(--fast);
}
.tokpick-trigger:hover { border-color: var(--accent-dim); }
.tokpick-trigger svg { width: 13px; height: 13px; color: var(--text-2); }
.tokpick-trigger .mini-swatch { width: 14px; height: 14px; border-radius: 3px; }

.popover {
  position: fixed; z-index: 1000;
  background: var(--elevated-bg);
  border: 1px solid var(--border-strong);
  border-radius: var(--r-md);
  box-shadow: var(--sh-pop);
  padding: 8px;
  max-height: 340px; overflow-y: auto;
  min-width: 220px;
}
.popover .pop-head { font-size: 10px; text-transform: uppercase; letter-spacing: .6px; color: var(--text-3); font-weight: 700; padding: 4px 6px 8px; }
.tok-pick-item {
  display: flex; align-items: center; gap: 9px;
  padding: 6px 8px; border-radius: var(--r-sm); cursor: pointer;
  transition: background var(--fast);
}
.tok-pick-item:hover { background: var(--hover); }
.tok-pick-item .swatch { width: 18px; height: 18px; border-radius: 4px; border: 1px solid rgba(255,255,255,.15); flex-shrink: 0; }
.tok-pick-item .name { flex: 1; font-size: 12px; font-family: var(--font-mono); }
.tok-pick-item .val { font-size: 10px; color: var(--text-3); font-family: var(--font-mono); }
.tok-pick-item.preview-box { font-family: var(--font-mono); font-size: 11px; }
.tok-pick-sep { height: 1px; background: var(--border); margin: 6px 0; }

/* Shadow layer builder */
.shadow-layer {
  background: var(--input-bg); border: 1px solid var(--border); border-radius: var(--r-sm);
  padding: 9px; margin-bottom: 8px; position: relative;
}
.shadow-layer .sl-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 8px; }
.shadow-layer .sl-head .sl-title { font-size: 10px; font-weight: 700; color: var(--text-2); text-transform: uppercase; letter-spacing: .5px; }
.shadow-layer-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 6px; }

/* CSS output */
.css-output {
  background: #0a0d12; border: 1px solid var(--border); border-radius: var(--r-md);
  padding: 12px; font-family: var(--font-mono); font-size: 11px; line-height: 1.65;
  color: var(--text-2); white-space: pre; overflow-x: auto;
  position: relative;
}
.css-output .cm-sel { color: #7dd3fc; }
.css-output .cm-prop { color: #a5b4fc; }
.css-output .cm-val { color: var(--text-1); }
.css-output .cm-var { color: var(--accent); }
.css-output .cm-com { color: var(--text-3); font-style: italic; }
.css-output .cm-punc { color: var(--text-3); }

.copy-btn {
  position: absolute; top: 8px; right: 8px;
  padding: 4px 8px; font-size: 10px; border-radius: 5px;
  background: var(--elevated-bg); border: 1px solid var(--border); color: var(--text-2);
  display: flex; align-items: center; gap: 5px;
  transition: all var(--fast);
}
.copy-btn:hover { color: var(--text-1); border-color: var(--border-strong); }
.copy-btn.done { color: var(--success); border-color: var(--success); }
.copy-btn svg { width: 12px; height: 12px; }

/* Token reference list */
.tokref { display: flex; align-items: center; gap: 8px; padding: 6px 8px; border-radius: var(--r-sm); cursor: pointer; transition: background var(--fast); }
.tokref:hover { background: var(--hover); }
.tokref .swatch { width: 14px; height: 14px; border-radius: 3px; flex-shrink: 0; border: 1px solid rgba(255,255,255,.15); }
.tokref .name { font-family: var(--font-mono); font-size: 11px; color: var(--accent); flex: 1; }
.tokref .where { font-size: 10px; color: var(--text-3); }

/* ---------------------------------------------------------------------------
   11. PAGE BUILDER
   --------------------------------------------------------------------------- */
.page-canvas { max-width: 1200px; margin: 0 auto; }
.page-frame-wrap { display: flex; justify-content: center; padding: 0; }
.page-frame {
  background: #fff; border-radius: var(--r-md);
  box-shadow: var(--sh-lg);
  transition: width var(--med);
  overflow: hidden;
  width: 100%;
}
.page-frame iframe { width: 100%; border: none; display: block; min-height: 600px; }

.page-build-list { display: flex; flex-direction: column; gap: 14px; }
.page-section {
  background: var(--card-bg); border: 1px solid var(--border); border-radius: var(--r-md);
  overflow: hidden;
}
.page-section.selected { border-color: var(--accent-dim); box-shadow: 0 0 0 1px var(--accent-dim); }
.page-section-head {
  display: flex; align-items: center; gap: 8px;
  padding: 9px 12px; background: var(--elevated-bg); border-bottom: 1px solid var(--border);
  cursor: pointer;
}
.page-section-head .drag-handle { color: var(--text-3); cursor: grab; }
.page-section-head .drag-handle svg { width: 14px; height: 14px; display: block; }
.page-section-head .sec-name { flex: 1; font-size: 12px; font-weight: 600; }
.page-section-head .sec-name .grp { color: var(--text-3); font-weight: 400; font-size: 10px; }
.page-section-body { padding: 12px; min-height: 60px; }
.page-section-comps { display: flex; flex-direction: column; gap: 8px; }

.placed-comp {
  display: flex; align-items: center; gap: 9px;
  padding: 9px 11px; background: var(--input-bg); border: 1px solid var(--border); border-radius: var(--r-sm);
  cursor: pointer; transition: border-color var(--fast); position: relative;
}
.placed-comp:hover { border-color: var(--border-strong); }
.placed-comp .type-ico { width: 14px; height: 14px; color: var(--accent); flex-shrink: 0; }
.placed-comp .name { flex: 1; font-size: 12px; }
.placed-comp.dragging { opacity: .4; }

.dropzone {
  border: 1.5px dashed var(--border-strong); border-radius: var(--r-sm);
  padding: 16px; text-align: center; color: var(--text-3); font-size: 11.5px;
  transition: all var(--fast);
}
.dropzone.over { border-color: var(--accent); background: var(--accent-soft); color: var(--accent); }

.add-section-btn {
  display: flex; align-items: center; justify-content: center; gap: 8px;
  width: 100%; padding: 14px;
  border: 1.5px dashed var(--border-strong); border-radius: var(--r-md);
  color: var(--text-2); font-weight: 600; font-size: 12.5px;
  transition: all var(--fast);
}
.add-section-btn:hover { border-color: var(--accent-dim); color: var(--accent); background: var(--accent-soft); }
.add-section-btn svg { width: 16px; height: 16px; }

/* Draggable palette item in left panel (pages mode) */
.palette-item {
  display: flex; align-items: center; gap: 9px;
  padding: 8px 14px; cursor: grab; transition: background var(--fast); user-select: none;
}
.palette-item:hover { background: var(--hover); }
.palette-item:active { cursor: grabbing; }
.palette-item .type-ico { width: 15px; height: 15px; color: var(--text-3); }
.palette-item .name { flex: 1; font-size: 12px; }
.palette-item .drag-dots { color: var(--text-3); opacity: .5; }
.palette-item .drag-dots svg { width: 13px; height: 13px; display: block; }

/* ---------------------------------------------------------------------------
   12. EXPORT VIEW
   --------------------------------------------------------------------------- */
.export-canvas { max-width: 920px; margin: 0 auto; }
.export-tabs { display: flex; gap: 4px; margin-bottom: 18px; border-bottom: 1px solid var(--border); }
.export-tab {
  padding: 10px 16px; font-size: 12.5px; font-weight: 600; color: var(--text-2);
  border-bottom: 2px solid transparent; transition: all var(--fast); margin-bottom: -1px;
}
.export-tab:hover { color: var(--text-1); }
.export-tab.active { color: var(--accent); border-bottom-color: var(--accent); }

.export-toolbar { display: flex; align-items: center; gap: 10px; margin-bottom: 14px; flex-wrap: wrap; }
.export-toolbar .opt { display: flex; align-items: center; gap: 7px; font-size: 12px; color: var(--text-2); cursor: pointer; }

.code-block {
  background: #0a0d12; border: 1px solid var(--border); border-radius: var(--r-md);
  padding: 18px; font-family: var(--font-mono); font-size: 12px; line-height: 1.7;
  color: var(--text-2); white-space: pre; overflow-x: auto;
  position: relative; max-height: 600px; overflow-y: auto;
}
.code-block .cm-sel { color: #7dd3fc; }
.code-block .cm-prop { color: #a5b4fc; }
.code-block .cm-val { color: var(--text-1); }
.code-block .cm-var { color: var(--accent); }
.code-block .cm-com { color: var(--text-3); font-style: italic; }
.code-block .cm-punc { color: var(--text-3); }
.code-block .cm-key { color: #c4b5fd; }
.code-block .cm-str { color: #86efac; }
.code-block .cm-num { color: #fbbf24; }

/* ---------------------------------------------------------------------------
   13. MODALS / DIALOGS
   --------------------------------------------------------------------------- */
.overlay-backdrop {
  position: fixed; inset: 0; background: rgba(0,0,0,.6); backdrop-filter: blur(3px);
  z-index: 500; display: grid; place-items: center; padding: 24px;
  animation: fade 150ms var(--ease);
}
@keyframes fade { from { opacity: 0; } }
.dialog {
  background: var(--elevated-bg); border: 1px solid var(--border-strong);
  border-radius: var(--r-lg); box-shadow: var(--sh-lg);
  width: 100%; max-width: 460px; max-height: 85vh; overflow: hidden;
  display: flex; flex-direction: column;
  animation: pop 180ms var(--ease);
}
.dialog.wide { max-width: 640px; }
@keyframes pop { from { opacity: 0; transform: scale(.96) translateY(8px); } }
.dialog-head { display: flex; align-items: center; justify-content: space-between; padding: 16px 18px; border-bottom: 1px solid var(--border); }
.dialog-head h3 { font-family: var(--font-display); font-size: 19px; font-weight: 400; }
.dialog-body { padding: 18px; overflow-y: auto; }
.dialog-foot { display: flex; justify-content: flex-end; gap: 8px; padding: 14px 18px; border-top: 1px solid var(--border); }

.type-picker-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
.type-pick {
  display: flex; flex-direction: column; align-items: center; gap: 8px;
  padding: 16px 10px; background: var(--input-bg); border: 1px solid var(--border); border-radius: var(--r-md);
  transition: all var(--fast); text-align: center;
}
.type-pick:hover { border-color: var(--accent-dim); background: var(--accent-soft); transform: translateY(-2px); }
.type-pick svg { width: 22px; height: 22px; color: var(--accent); }
.type-pick .label { font-size: 11px; font-weight: 600; color: var(--text-1); }
.type-pick .desc { font-size: 9.5px; color: var(--text-3); }

/* Toast */
.toast-host { position: fixed; bottom: 20px; left: 50%; transform: translateX(-50%); z-index: 2000; display: flex; flex-direction: column; gap: 8px; align-items: center; }
.toast {
  display: flex; align-items: center; gap: 9px;
  background: var(--elevated-bg); border: 1px solid var(--border-strong);
  border-radius: var(--r-md); padding: 10px 16px; box-shadow: var(--sh-pop);
  font-size: 12.5px; color: var(--text-1);
  animation: toastin 200ms var(--ease);
}
@keyframes toastin { from { opacity: 0; transform: translateY(12px); } }
.toast.out { animation: toastout 200ms var(--ease) forwards; }
@keyframes toastout { to { opacity: 0; transform: translateY(12px); } }
.toast svg { width: 15px; height: 15px; }
.toast.success svg { color: var(--success); }
.toast.error svg { color: var(--error); }
.toast.info svg { color: var(--info); }

/* Context menu */
.ctx-menu {
  position: fixed; z-index: 1500;
  background: var(--elevated-bg); border: 1px solid var(--border-strong);
  border-radius: var(--r-md); box-shadow: var(--sh-pop); padding: 5px; min-width: 170px;
  animation: pop 120ms var(--ease);
}
.ctx-item { display: flex; align-items: center; gap: 9px; padding: 7px 10px; border-radius: var(--r-sm); font-size: 12px; cursor: pointer; transition: background var(--fast); }
.ctx-item:hover { background: var(--hover); }
.ctx-item svg { width: 14px; height: 14px; color: var(--text-3); }
.ctx-item.danger { color: var(--error); }
.ctx-item.danger svg { color: var(--error); }
.ctx-sep { height: 1px; background: var(--border); margin: 4px 0; }

/* Add-child menu list */
.addchild-list { max-height: 300px; overflow-y: auto; }

/* Utility */
.hidden { display: none !important; }
.muted { color: var(--text-3); }
.text-c { text-align: center; }
.flex { display: flex; }
.flex-col { display: flex; flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-6 { gap: 6px; }
.gap-8 { gap: 8px; }
.gap-10 { gap: 10px; }
.mt-8 { margin-top: 8px; }
.mt-12 { margin-top: 12px; }
.mb-8 { margin-bottom: 8px; }
.mb-12 { margin-bottom: 12px; }
.w-full { width: 100%; }
.grow { flex: 1; }
.divider-h { height: 1px; background: var(--border); margin: 12px 0; }

.kbd {
  font-family: var(--font-mono); font-size: 10px;
  background: var(--input-bg); border: 1px solid var(--border); border-bottom-width: 2px;
  border-radius: 4px; padding: 1px 5px; color: var(--text-2);
}

.help-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 6px 24px; }
.help-row { display: flex; align-items: center; justify-content: space-between; padding: 5px 0; font-size: 12px; }
.help-row .keys { display: flex; gap: 3px; }

@media (max-width: 1100px) {
  :root { --left-w: 220px; --right-w: 290px; }
}

/* Tablet / small laptop — tighten panel widths further. */
@media (max-width: 900px) {
  :root { --left-w: 200px; --right-w: 264px; }
}

/* Backdrop behind an open mobile panel (element created/removed in JS). */
.panel-scrim { position: fixed; inset: var(--toolbar-h) 0 0 0; background: rgba(0,0,0,.45); z-index: 1150; }

/* Mobile — panels become off-canvas overlays so the canvas keeps full width. */
@media (max-width: 768px) {
  .workspace,
  .workspace.left-collapsed,
  .workspace.right-collapsed,
  .workspace.left-collapsed.right-collapsed { grid-template-columns: 1fr; }

  .panel-left, .panel-right {
    position: fixed;
    top: var(--toolbar-h);
    bottom: 0;
    width: min(85vw, 320px);
    z-index: 1200;
    opacity: 1 !important;          /* override the desktop collapse fade */
    pointer-events: auto !important;
    transition: transform var(--med);
  }
  .panel-left  { left: 0;  transform: translateX(-105%); }
  .panel-right { right: 0; transform: translateX(105%); }
  .workspace:not(.left-collapsed)  .panel-left  { transform: none; box-shadow: 6px 0 40px rgba(0,0,0,.5); }
  .workspace:not(.right-collapsed) .panel-right { transform: none; box-shadow: -6px 0 40px rgba(0,0,0,.5); }

  /* keep wide content scrollable rather than overflowing the viewport */
  .canvas-inner { padding: 14px; }
  .code-block, .css-output, pre { max-width: 100%; overflow-x: auto; }
}

/* Very small phones. */
@media (max-width: 375px) {
  .toolbar { padding: 0 6px; gap: 2px; }
  .brand { padding-right: 8px; margin-right: 3px; }
  .brand-name { display: none; }
  .panel-left, .panel-right { width: 92vw; }
  .canvas-inner { padding: 10px; }
}

/* ===========================================================================
   ACCESSIBILITY
   =========================================================================== */

/* Visible keyboard-only focus ring (mouse clicks don't trigger :focus-visible). */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}
/* Suppress the default outline only where a :focus-visible ring replaces it. */
button:focus:not(:focus-visible),
.lib-row:focus:not(:focus-visible),
.mode-tab:focus:not(:focus-visible),
[tabindex]:focus:not(:focus-visible) { outline: none; }

/* Honor users who prefer reduced motion — neutralize animation/transition. */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}