/* ---------- Theme tokens (monochromatic, Roboto) ---------- */
@import url('https://fonts.googleapis.com/css2?family=Roboto:wght@200;400;500;700&display=swap');

:root {
  /* Dark (default) */
  --bg: #0a0a0a;
  --bg-2: #141414;
  --bg-3: #1f1f1f;
  --bg-hover: #262626;
  --border: #262626;
  --border-strong: #3a3a3a;
  --text: #fafafa;
  --text-dim: #a3a3a3;
  --text-faint: #737373;
  --accent: #fafafa;
  --accent-2: #d4d4d4;
  --accent-soft: rgba(250, 250, 250, 0.10);
  --accent-on: #0a0a0a;
  /* Selection feedback is intentionally chromatic — separate from the
     monochrome brand accent so it pops against any document content. */
  --selection: #3b82f6;
  --selection-soft: rgba(59, 130, 246, 0.14);
  --selection-glow: rgba(59, 130, 246, 0.32);
  --hover: #60a5fa;
  --danger: #ef4444;
  --success: #22c55e;
  --warn: #f59e0b;
  --shadow: 0 4px 20px rgba(0,0,0,0.5);
  --radius: 8px;
  --radius-sm: 6px;
  --sidebar-w: 280px;
  --sidebar-r-w: 320px;
  --toolbar-h: 48px;
  --statusbar-h: 26px;
  --mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  --sans: 'Roboto', -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
}
html[data-theme="light"] {
  --bg: #ffffff;
  --bg-2: #fafafa;
  --bg-3: #f4f4f5;
  --bg-hover: #e5e5e5;
  --border: #e5e5e5;
  --border-strong: #d4d4d4;
  --text: #0a0a0a;
  --text-dim: #525252;
  --text-faint: #a3a3a3;
  --accent: #0a0a0a;
  --accent-2: #404040;
  --accent-soft: rgba(10, 10, 10, 0.06);
  --accent-on: #ffffff;
  --selection: #2563eb;
  --selection-soft: rgba(37, 99, 235, 0.10);
  --selection-glow: rgba(37, 99, 235, 0.28);
  --hover: #3b82f6;
  --shadow: 0 2px 12px rgba(0,0,0,0.06);
}

/* Honor [hidden] even on grid/flex containers */
[hidden] { display: none !important; }

/* ---------- Icons (Lucide) ---------- */
[data-lucide], .lucide {
  width: 16px;
  height: 16px;
  stroke-width: 1.75;
  stroke: currentColor;
  fill: none;
  flex-shrink: 0;
  display: inline-block;
  vertical-align: middle;
  transition: transform 0.18s cubic-bezier(.2,.7,.3,1), opacity 0.18s;
}
.empty-actions .btn [data-lucide],
.empty-actions .btn .lucide { width: 22px; height: 22px; stroke-width: 1.6; }
.empty-actions .btn:hover [data-lucide],
.empty-actions .btn:hover .lucide { transform: scale(1.08) translateY(-1px); }

.empty-logo {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  border-radius: 14px;
  background: var(--text);
  color: var(--bg);
  margin-bottom: 20px;
  box-shadow: 0 8px 32px rgba(0,0,0,0.25);
}
.empty-logo [data-lucide], .empty-logo .lucide {
  width: 28px; height: 28px; stroke-width: 2;
  animation: logo-float 4s ease-in-out infinite;
}
@keyframes logo-float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-3px); }
}

.hint-icon { width: 14px !important; height: 14px !important; margin-right: 4px; opacity: 0.6; }

/* Tool button icon hover */
.tool-btn .lucide,
.tool-btn [data-lucide] { width: 15px; height: 15px; }
.tool-btn.icon-only { padding: 6px 8px; }
.tool-btn:hover [data-lucide],
.tool-btn:hover .lucide { transform: scale(1.08); }
.tool-btn:active [data-lucide],
.tool-btn:active .lucide { transform: scale(0.92); }
.tool-btn.primary [data-lucide],
.tool-btn.primary .lucide { stroke-width: 2; }

/* Press animation (subtle bounce on click) */
.anim-press:active [data-lucide],
.anim-press:active .lucide { animation: press-bounce 0.25s ease; }
@keyframes press-bounce {
  0% { transform: scale(0.85); }
  60% { transform: scale(1.12); }
  100% { transform: scale(1); }
}

/* Delete: subtle shake on hover */
.anim-shake:hover [data-lucide],
.anim-shake:hover .lucide {
  animation: shake-wiggle 0.5s ease;
  color: var(--danger);
}
@keyframes shake-wiggle {
  0%, 100% { transform: rotate(0); }
  25% { transform: rotate(-7deg); }
  75% { transform: rotate(7deg); }
}

/* Eye blink */
.anim-blink:hover [data-lucide],
.anim-blink:hover .lucide { animation: blink 0.6s ease; }
@keyframes blink {
  0%, 100% { transform: scaleY(1); }
  50% { transform: scaleY(0.1); }
}

/* Theme toggle — sun/moon crossfade like mncoleman.com */
.theme-toggle {
  position: relative;
  width: 32px;
  height: 32px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.theme-toggle [data-lucide], .theme-toggle .lucide {
  position: absolute;
  width: 16px;
  height: 16px;
  transition: transform 0.4s cubic-bezier(.2,.7,.3,1), opacity 0.3s;
}
.theme-toggle .th-sun { transform: rotate(0) scale(1); opacity: 1; }
.theme-toggle .th-moon { transform: rotate(90deg) scale(0); opacity: 0; }
html[data-theme="dark"] .theme-toggle .th-sun { transform: rotate(-90deg) scale(0); opacity: 0; }
html[data-theme="dark"] .theme-toggle .th-moon { transform: rotate(0) scale(1); opacity: 1; }

/* Block tile icons (when they're lucide) */
.block-item [data-lucide], .block-item .lucide {
  width: 20px; height: 20px; stroke-width: 1.6;
}
.block-item:hover [data-lucide], .block-item:hover .lucide {
  transform: scale(1.08) rotate(-2deg);
  color: var(--text);
}

/* Sidebar tab icons (if used) */
.tab [data-lucide], .tab .lucide { width: 14px; height: 14px; margin-right: 4px; }

/* Selection toolbar buttons */
.sel-toolbar button [data-lucide], .sel-toolbar button .lucide { width: 14px; height: 14px; }
.sel-toolbar button:hover [data-lucide], .sel-toolbar button:hover .lucide { transform: scale(1.1); }

/* Save button: pulse when dirty (data attribute on body) */
body[data-dirty="true"] #tb-save [data-lucide],
body[data-dirty="true"] #tb-save .lucide {
  animation: dirty-pulse 1.8s ease-in-out infinite;
}
@keyframes dirty-pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.12); }
}

/* Refresh button: spin slowly + warning ring when disk has external changes */
#tb-refresh.has-update {
  color: var(--warn);
  position: relative;
}
#tb-refresh.has-update [data-lucide],
#tb-refresh.has-update .lucide {
  animation: refresh-spin 3s linear infinite;
}
#tb-refresh.has-update::after {
  content: '';
  position: absolute;
  top: 3px; right: 3px;
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--warn);
  box-shadow: 0 0 8px var(--warn);
  animation: pulse-dot 1.4s ease-in-out infinite;
}
@keyframes refresh-spin {
  to { transform: rotate(360deg); }
}
@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.6); }
}

/* Status bar/recent icons */
.recent-item [data-lucide], .snippet-item [data-lucide] { width: 12px; height: 12px; opacity: 0.6; }

* { box-sizing: border-box; }
html, body { height: 100%; margin: 0; padding: 0; }
body {
  font-family: var(--sans);
  font-size: 13px;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow: hidden;
}
button { font-family: inherit; color: inherit; }
input, select, textarea { font-family: inherit; color: inherit; }

/* ---------- Empty state ---------- */
.empty-state {
  position: fixed; inset: 0;
  overflow-y: auto;
  background:
    radial-gradient(1000px 700px at 50% 30%, rgba(255,255,255,0.04), transparent 60%),
    var(--bg);
}
.empty-state > .empty-inner {
  min-height: 100vh;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  margin: 0 auto;
}
html[data-theme="light"] .empty-state {
  background:
    radial-gradient(1000px 700px at 50% 30%, rgba(0,0,0,0.03), transparent 60%),
    var(--bg);
}
.empty-inner {
  text-align: center;
  max-width: 640px;
  padding: 40px 24px;
}
.wordmark {
  font-family: var(--sans);
  font-weight: 200;
  font-size: 13px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-bottom: 24px;
}
.wordmark .slash { color: var(--text-faint); margin: 0 8px; }
.empty-inner h1 {
  margin: 0 0 12px;
  font-size: 42px;
  font-weight: 200;
  letter-spacing: -0.02em;
  color: var(--text);
}
.empty-inner h1 strong { font-weight: 700; }
.empty-inner p {
  margin: 0 auto 28px;
  color: var(--text-dim);
  max-width: 480px;
  line-height: 1.5;
}
.empty-actions {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-bottom: 24px;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 16px;
  border-radius: var(--radius);
  background: var(--bg-2);
  border: 1px solid var(--border);
  cursor: pointer;
  transition: all 0.15s;
  color: var(--text);
  font-size: 13px;
}
.btn:hover {
  background: var(--bg-3);
  border-color: var(--border-strong);
}
.empty-actions .btn {
  flex-direction: column;
  padding: 20px 14px;
  gap: 6px;
}
.empty-actions .btn { position: relative; }
.empty-actions .btn:hover { transform: translateY(-1px); }
.empty-actions .btn .icon { font-size: 24px; }
.empty-actions .btn > span { font-weight: 600; }
.empty-actions .btn small { color: var(--text-faint); font-size: 11px; }
.btn-shortcut {
  position: absolute;
  top: 8px;
  right: 8px;
  font-family: var(--mono);
  font-size: 10px;
  line-height: 1;
  padding: 3px 5px;
  background: var(--bg-1);
  color: var(--text-faint);
  border: 1px solid var(--border);
  border-radius: 3px;
}
.empty-actions .btn-primary .btn-shortcut {
  background: rgba(0, 0, 0, 0.18);
  color: var(--accent-on);
  border-color: transparent;
}
#empty-restore { position: relative; padding-left: 36px; padding-right: 16px; }
#empty-restore .btn-shortcut { top: 50%; left: 10px; right: auto; transform: translateY(-50%); }
.empty-actions .btn-primary {
  background: var(--accent);
  border-color: transparent;
  color: var(--accent-on);
}
.empty-actions .btn-primary small { color: var(--accent-on); opacity: 0.7; }
.empty-actions .btn-primary:hover { filter: brightness(0.92); }
html[data-theme="dark"] .empty-actions .btn-primary:hover { filter: brightness(0.85); }

.empty-drop-hint {
  color: var(--text-faint);
  font-size: 13px;
  margin-bottom: 24px;
}
.empty-shortcuts {
  color: var(--text-faint);
  font-size: 12px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
}
.empty-shortcuts kbd {
  font-family: var(--mono);
  font-size: 11px;
  padding: 2px 6px;
  border-radius: 4px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  margin-right: 3px;
}
.browser-warning {
  margin-top: 16px;
  padding: 10px 14px;
  background: rgba(240, 184, 110, 0.12);
  border: 1px solid rgba(240, 184, 110, 0.3);
  border-radius: var(--radius);
  color: var(--warn);
  font-size: 12px;
}

.drag-over::after {
  content: "Drop HTML file to open";
  position: fixed; inset: 0;
  display: grid; place-items: center;
  background: rgba(108, 140, 255, 0.15);
  border: 3px dashed var(--accent);
  color: var(--text);
  font-size: 24px;
  font-weight: 600;
  z-index: 9999;
  pointer-events: none;
}

/* ---------- Editor layout ---------- */
.editor {
  display: grid;
  grid-template-rows: var(--toolbar-h) 1fr var(--statusbar-h);
  height: 100vh;
}

/* ---------- Toolbar ---------- */
.toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 12px;
  background: var(--bg-2);
  border-bottom: 1px solid var(--border);
  gap: 12px;
  user-select: none;
}
.toolbar-left, .toolbar-center, .toolbar-right {
  display: flex;
  align-items: center;
  gap: 4px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 0 12px 0 0;
  border-right: 1px solid var(--border);
  margin-right: 8px;
  height: 28px;
  text-decoration: none;
  color: inherit;
}
.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  background: var(--text);
  color: var(--bg);
  font-weight: 700;
  font-size: 13px;
  border-radius: 5px;
}
.brand-text {
  font-weight: 500;
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-dim);
}
.brand-text .brand-sep { color: var(--text-faint); margin: 0 4px; }
.brand:hover .brand-text { color: var(--text); }
.file-info {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}
.file-name {
  font-size: 12px;
  font-weight: 500;
  max-width: 200px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.save-status {
  font-size: 10px;
  color: var(--text-faint);
}
.save-status[data-state="dirty"] { color: var(--warn); }
.save-status[data-state="saving"] { color: var(--accent); }
.save-status[data-state="saved"] { color: var(--success); }
.save-status[data-state="error"] { color: var(--danger); }

.tool-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 10px;
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 12px;
  color: var(--text);
  transition: background 0.1s, border-color 0.1s;
  white-space: nowrap;
}
.tool-btn:hover { background: var(--bg-3); }
.tool-btn:active { background: var(--bg-hover); }
.tool-btn.active { background: var(--accent-soft); border-color: var(--accent); color: var(--accent); }
.tool-btn.primary {
  background: var(--accent);
  color: var(--accent-on);
  border-color: var(--accent);
}
.tool-btn.primary:hover { filter: brightness(0.92); }
.tool-btn.icon-only { padding: 6px 8px; }
.tool-btn:disabled { opacity: 0.4; cursor: not-allowed; }
.divider {
  width: 1px;
  height: 22px;
  background: var(--border);
  margin: 0 4px;
}
.device-toggle { display: flex; gap: 2px; }
.device-btn { padding: 6px 8px; }

/* ---------- Workspace ---------- */
.workspace {
  display: grid;
  grid-template-columns: var(--sidebar-w) 1fr var(--sidebar-r-w);
  min-height: 0;
  overflow: hidden;
}
.editor.preview-mode .left-sidebar,
.editor.preview-mode .right-sidebar,
.editor.preview-mode .selection-overlay { display: none; }
.editor.preview-mode .workspace { grid-template-columns: 1fr; }

/* Source mode: collapse the 3-column grid; source pane fills the workspace */
body[data-mode="source"] .workspace { grid-template-columns: 1fr; }
.editor.preview-mode .toolbar { opacity: 0.15; transition: opacity 0.15s; }
.editor.preview-mode .toolbar:hover { opacity: 1; }

.exit-preview-btn {
  position: fixed;
  top: 12px;
  left: 50%;
  transform: translateX(-50%);
  padding: 8px 16px;
  background: var(--accent);
  color: var(--accent-on);
  border: none;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  box-shadow: 0 4px 16px rgba(0,0,0,0.4);
  z-index: 9998;
  transition: transform 0.15s;
}
.exit-preview-btn:hover { transform: translateX(-50%) scale(1.05); }

/* ---------- Sidebars ---------- */
.sidebar {
  background: var(--bg-2);
  display: flex;
  flex-direction: column;
  min-height: 0;
}
.left-sidebar { border-right: 1px solid var(--border); }
.right-sidebar { border-left: 1px solid var(--border); }
.sidebar-tabs {
  display: flex;
  border-bottom: 1px solid var(--border);
  background: var(--bg);
}
.tab {
  flex: 1;
  padding: 10px 8px;
  background: transparent;
  border: none;
  cursor: pointer;
  font-size: 12px;
  color: var(--text-dim);
  border-bottom: 2px solid transparent;
  transition: color 0.1s, border-color 0.1s;
}
.tab:hover { color: var(--text); }
.tab.active {
  color: var(--text);
  border-bottom-color: var(--accent);
}
.tab-panel {
  display: none;
  flex: 1;
  overflow-y: auto;
  padding: 12px;
  min-height: 0;
}
.tab-panel.active { display: block; }
.tab-panel.active.flex { display: flex; flex-direction: column; }

/* ---------- Blocks panel ---------- */
.search-input {
  width: 100%;
  padding: 7px 10px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: 12px;
  margin-bottom: 10px;
  outline: none;
}
.search-input:focus { border-color: var(--accent); }
.blocks-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}
.block-category {
  grid-column: 1 / -1;
  font-size: 10px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-faint);
  margin: 8px 0 2px;
}
.block-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  padding: 12px 6px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: grab;
  font-size: 11px;
  color: var(--text-dim);
  transition: all 0.1s;
  text-align: center;
  user-select: none;
}
.block-item:hover {
  border-color: var(--accent);
  color: var(--text);
  background: var(--bg-3);
  transform: translateY(-1px);
}
.block-item:active { cursor: grabbing; }
.block-item .block-icon { font-size: 20px; line-height: 1; }
.block-item .block-name { font-weight: 500; }
.block-item.dragging { opacity: 0.5; }

/* ---------- DOM tree ---------- */
.dom-tree { font-family: var(--mono); font-size: 11.5px; }
.tree-node { padding: 1px 0; }
.tree-row {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 3px 4px;
  border-radius: 3px;
  cursor: pointer;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  color: var(--text-dim);
}
.tree-row:hover { background: var(--bg-3); color: var(--text); }
.tree-row.selected { background: var(--accent-soft); color: var(--text); }
.tree-row.drop-before { box-shadow: inset 0 2px 0 var(--accent); }
.tree-row.drop-after { box-shadow: inset 0 -2px 0 var(--accent); }
.tree-row.drop-inside { background: var(--accent-soft); outline: 1px dashed var(--accent); }
.tree-toggle {
  width: 12px;
  height: 12px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--text-faint);
  font-size: 9px;
  flex-shrink: 0;
}
.tree-tag { color: var(--accent); }
.tree-id { color: var(--warn); }
.tree-class { color: var(--success); }
.tree-children { padding-left: 14px; }

/* ---------- Properties ---------- */
.props { display: flex; flex-direction: column; gap: 16px; }
.props.empty { align-items: center; padding-top: 40px; color: var(--text-faint); font-size: 12px; text-align: center; }
.prop-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.prop-group h4 {
  margin: 0;
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-faint);
  padding-bottom: 6px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.prop-row {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 8px;
  align-items: center;
}
.prop-row label {
  font-size: 11px;
  color: var(--text-dim);
}
.prop-row input,
.prop-row select,
.prop-row textarea {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 5px 8px;
  font-size: 12px;
  outline: none;
  min-width: 0;
  width: 100%;
}
.prop-row input:focus,
.prop-row select:focus,
.prop-row textarea:focus { border-color: var(--accent); }
.prop-row input[type="color"] {
  padding: 2px;
  height: 26px;
  cursor: pointer;
}
.prop-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
}
.prop-grid .prop-row { grid-template-columns: 1fr; gap: 3px; }
.prop-grid .prop-row label { font-size: 10px; }

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}
.chip {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 7px;
  background: var(--accent-soft);
  border: 1px solid transparent;
  border-radius: 12px;
  font-size: 11px;
  font-family: var(--mono);
  color: var(--accent);
}
.chip button {
  background: none;
  border: none;
  cursor: pointer;
  color: inherit;
  font-size: 11px;
  padding: 0;
  opacity: 0.7;
}
.chip button:hover { opacity: 1; }
.chip-input {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 3px 8px;
  font-size: 11px;
  outline: none;
  width: 100px;
}

.html-textarea {
  width: 100%;
  min-height: 240px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 8px;
  font-family: var(--mono);
  font-size: 11.5px;
  line-height: 1.5;
  color: var(--text);
  resize: vertical;
  outline: none;
  white-space: pre;
}
.html-textarea:focus { border-color: var(--accent); }

.spacing-box {
  position: relative;
  border: 1px dashed var(--border-strong);
  padding: 26px 22px;
  border-radius: 4px;
  text-align: center;
  color: var(--text-faint);
  font-size: 9px;
  margin: 4px 0;
}
.spacing-box .inner-box {
  border: 1px dashed var(--accent);
  padding: 24px 20px;
  border-radius: 3px;
  color: var(--text-dim);
}
.spacing-box input {
  width: 36px;
  padding: 2px;
  font-size: 10px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 3px;
  text-align: center;
  color: var(--text);
  outline: none;
}
.spacing-box input:focus { border-color: var(--accent); }
.spacing-box .sb-t, .spacing-box .sb-b, .spacing-box .sb-l, .spacing-box .sb-r {
  position: absolute;
}
.spacing-box .sb-t { top: 4px; left: 50%; transform: translateX(-50%); }
.spacing-box .sb-b { bottom: 4px; left: 50%; transform: translateX(-50%); }
.spacing-box .sb-l { left: 4px; top: 50%; transform: translateY(-50%); }
.spacing-box .sb-r { right: 4px; top: 50%; transform: translateY(-50%); }
.spacing-box .sb-label { position: absolute; top: 2px; left: 6px; font-size: 9px; }

.btn-block {
  width: 100%;
  padding: 8px 10px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: 12px;
  cursor: pointer;
  transition: background 0.1s;
}
.btn-block:hover { background: var(--bg-3); }
.btn-block:disabled { opacity: 0.4; cursor: not-allowed; }
.btn-row { display: flex; gap: 6px; }
.btn-row .btn-block { flex: 1; }

.assets-section { margin-bottom: 18px; }
.assets-section h3 {
  margin: 0 0 4px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-faint);
}
.assets-section .hint { font-size: 11px; color: var(--text-faint); margin: 0 0 8px; }
.snippets-list, .recent-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-top: 8px;
}
.recent-item, .snippet-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 4px;
  padding: 6px 8px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 4px;
  font-size: 11px;
  cursor: pointer;
}
.recent-item:hover, .snippet-item:hover { background: var(--bg-3); }
.recent-item button, .snippet-item button {
  background: none; border: none; color: var(--text-faint); cursor: pointer; font-size: 11px;
  padding: 0 4px;
}
.recent-item button:hover, .snippet-item button:hover { color: var(--danger); }
.empty-list { color: var(--text-faint); font-size: 11px; font-style: italic; padding: 6px 0; }

/* ---------- Canvas ---------- */
.canvas-wrap {
  position: relative;
  background:
    linear-gradient(45deg, var(--bg-2) 25%, transparent 25%),
    linear-gradient(-45deg, var(--bg-2) 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, var(--bg-2) 75%),
    linear-gradient(-45deg, transparent 75%, var(--bg-2) 75%);
  background-size: 20px 20px;
  background-position: 0 0, 0 10px, 10px -10px, -10px 0px;
  background-color: var(--bg);
  display: flex;
  align-items: stretch;
  justify-content: center;
  overflow: auto;
  padding: 0;
}
.canvas-frame {
  position: relative;
  background: white;
  overflow: hidden;
  width: 100%;
  height: 100%;
  transition: width 0.2s, max-width 0.2s;
  box-shadow: 0 0 0 1px var(--border);
}
.canvas-frame[data-device="tablet"] {
  max-width: 820px;
  margin: 20px auto;
  height: calc(100% - 40px);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 12px 40px rgba(0,0,0,0.4);
}
.canvas-frame[data-device="mobile"] {
  max-width: 400px;
  margin: 20px auto;
  height: calc(100% - 40px);
  border-radius: 18px;
  overflow: hidden;
  box-shadow: 0 12px 40px rgba(0,0,0,0.4);
}
#canvas {
  width: 100%;
  height: 100%;
  border: none;
  display: block;
  background: white;
}

/* ---------- Selection overlay (inside canvas-frame, positioned absolutely above iframe) ---------- */
.selection-overlay {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 10;
}
.sel-box {
  position: absolute;
  outline: 2px solid var(--selection);
  outline-offset: -1px;
  background: var(--selection-soft);
  pointer-events: none;
  box-shadow:
    0 0 0 1px var(--selection-glow),
    0 6px 24px -4px var(--selection-glow);
  transition: outline-color 0.1s;
  animation: sel-pop 0.18s cubic-bezier(.2,.7,.3,1);
}
@keyframes sel-pop {
  from { box-shadow: 0 0 0 8px rgba(59,130,246,0); }
  to   { box-shadow: 0 0 0 1px var(--selection-glow), 0 6px 24px -4px var(--selection-glow); }
}
.sel-label {
  position: absolute;
  background: var(--selection);
  color: white;
  padding: 3px 8px;
  font-size: 11px;
  font-weight: 600;
  font-family: var(--mono);
  border-radius: 4px 4px 0 0;
  pointer-events: none;
  white-space: nowrap;
  z-index: 11;
  letter-spacing: 0.02em;
  box-shadow: 0 -2px 8px var(--selection-glow);
}
.sel-toolbar {
  position: absolute;
  display: flex;
  gap: 2px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 3px;
  pointer-events: auto;
  box-shadow: var(--shadow);
  z-index: 12;
}
.sel-toolbar button {
  width: 26px;
  height: 26px;
  background: transparent;
  border: none;
  color: var(--text);
  border-radius: 4px;
  cursor: pointer;
  font-size: 13px;
}
.sel-toolbar button:hover { background: var(--bg-3); color: var(--selection); }
.sel-toolbar [data-action="delete"]:hover,
.sel-toolbar [data-action="row-delete"]:hover,
.sel-toolbar [data-action="col-delete"]:hover { color: var(--danger); }
.sel-divider {
  width: 1px;
  align-self: stretch;
  background: var(--border);
  margin: 0 2px;
}
.sel-toolbar [data-context-group] { display: none; }
.sel-toolbar.ctx-table [data-context-group="table"] { display: inline-flex; }
.sel-toolbar.ctx-list  [data-context-group="list"]  { display: inline-flex; }
.sel-toolbar button [data-lucide], .sel-toolbar button .lucide { width: 14px; height: 14px; }
.hover-box {
  position: absolute;
  outline: 1.5px dashed var(--hover);
  background: rgba(96,165,250,0.05);
  pointer-events: none;
  z-index: 9;
  transition: outline-color 0.1s;
}
.drop-indicator {
  position: absolute;
  background: var(--selection);
  height: 3px;
  z-index: 13;
  pointer-events: none;
  box-shadow: 0 0 12px var(--selection-glow);
  border-radius: 2px;
}
.drop-indicator.vertical { width: 3px; height: auto; }
.drop-indicator.inside {
  height: auto;
  background: var(--selection-soft);
  outline: 2px dashed var(--selection);
  outline-offset: -2px;
  box-shadow: 0 0 16px var(--selection-glow);
}

/* ---------- Source pane ---------- */
.source-wrap {
  display: flex;
  flex-direction: column;
  min-height: 0;
  overflow: hidden;
  background: var(--bg);
}
.source-pane {
  flex: 1;
  min-height: 0;
  overflow: hidden;
  position: relative;
}
.source-pane .cm-editor {
  height: 100%;
  outline: none;
  background: var(--bg);
  color: var(--text);
}
.source-pane .cm-editor.cm-focused { outline: none; }
.source-pane .cm-scroller { background: var(--bg); }
.source-fallback {
  width: 100%;
  height: 100%;
  border: none;
  resize: none;
  padding: 14px 16px;
  background: var(--bg);
  color: var(--text);
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.55;
  outline: none;
  white-space: pre;
}

/* Mode toggle (Visual / Source pills) */
.mode-toggle {
  display: inline-flex;
  background: var(--bg-3);
  border-radius: 7px;
  padding: 2px;
  gap: 0;
  margin-right: 12px;
}
.mode-btn {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 4px 10px;
  background: transparent;
  border: none;
  border-radius: 5px;
  color: var(--text-dim);
  font-size: 12px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s;
}
.mode-btn:hover { color: var(--text); }
.mode-btn.active {
  background: var(--bg);
  color: var(--text);
  box-shadow: 0 1px 4px rgba(0,0,0,0.2);
}
.mode-btn [data-lucide], .mode-btn .lucide { width: 13px; height: 13px; }

/* ---------- Status bar ---------- */
.statusbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 12px;
  background: var(--bg-2);
  border-top: 1px solid var(--border);
  font-size: 11px;
  color: var(--text-dim);
}
.breadcrumbs {
  font-family: var(--mono);
  display: flex;
  align-items: center;
  gap: 4px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  flex: 1;
}

/* Version chip — bottom-left in statusbar, also floating in empty-state */
.version-chip {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 1px 7px 1px 5px;
  margin-right: 8px;
  font-family: var(--mono);
  font-size: 10.5px;
  color: var(--text-faint);
  background: var(--bg-3);
  border: 1px solid var(--border);
  border-radius: 999px;
  text-decoration: none;
  transition: color 0.15s, border-color 0.15s, background 0.15s;
}
.version-chip:hover {
  color: var(--text);
  border-color: var(--border-strong);
  background: var(--bg-hover);
}
.version-chip [data-lucide], .version-chip .lucide {
  width: 11px;
  height: 11px;
  opacity: 0.7;
}
.version-chip:hover [data-lucide], .version-chip:hover .lucide { opacity: 1; }
.empty-version-chip {
  position: fixed;
  bottom: 16px;
  left: 16px;
  margin-right: 0;
  z-index: 10;
}
.breadcrumbs .crumb {
  cursor: pointer;
  padding: 1px 4px;
  border-radius: 3px;
}
.breadcrumbs .crumb:hover { background: var(--bg-3); color: var(--text); }
.breadcrumbs .crumb.active { color: var(--accent); }
.breadcrumbs .sep { color: var(--text-faint); }
.crumb-actions {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin-left: 8px;
  padding-left: 8px;
  border-left: 1px solid var(--border);
  flex-shrink: 0;
}
.crumb-btn {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  height: 20px;
  padding: 0 6px;
  background: transparent;
  border: none;
  color: var(--text-faint);
  border-radius: 3px;
  cursor: pointer;
  font-family: inherit;
  font-size: 11px;
  line-height: 1;
  white-space: nowrap;
}
.crumb-btn:hover { background: var(--bg-3); color: var(--text); }
.crumb-btn [data-lucide], .crumb-btn .lucide { width: 12px; height: 12px; }
.crumb-btn-label { font-variant-numeric: tabular-nums; }
.status-right { display: flex; align-items: center; gap: 12px; }
.autosave { color: var(--text-faint); }

/* ---------- Toasts ---------- */
.toasts {
  position: fixed;
  bottom: 36px;
  right: 16px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  z-index: 9999;
  pointer-events: none;
}
.toast {
  background: var(--bg-3);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  padding: 8px 14px;
  border-radius: 6px;
  font-size: 12px;
  color: var(--text);
  box-shadow: var(--shadow);
  animation: toast-in 0.2s ease-out;
  pointer-events: auto;
  max-width: 320px;
}
.toast.success { border-left-color: var(--success); }
.toast.error { border-left-color: var(--danger); }
.toast.warn { border-left-color: var(--warn); }
@keyframes toast-in {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ---------- Custom dialogs (alert / confirm / prompt) ---------- */
.dialog-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.55);
  backdrop-filter: blur(6px);
  display: grid;
  place-items: center;
  z-index: 11000;
  padding: 24px;
  animation: dialog-fade-in 0.16s ease-out;
}
.dialog-overlay.closing { animation: dialog-fade-out 0.14s ease-in forwards; }
@keyframes dialog-fade-in {
  from { opacity: 0; }
  to   { opacity: 1; }
}
@keyframes dialog-fade-out {
  from { opacity: 1; }
  to   { opacity: 0; }
}
.dialog-panel {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 14px;
  width: min(440px, 100%);
  padding: 22px 24px 20px;
  box-shadow: 0 28px 64px -12px rgba(0,0,0,0.6), 0 0 0 1px rgba(255,255,255,0.04);
  animation: dialog-pop 0.18s cubic-bezier(.2,.7,.3,1.1);
}
@keyframes dialog-pop {
  from { transform: scale(0.94) translateY(8px); opacity: 0; }
  to   { transform: scale(1) translateY(0); opacity: 1; }
}
.dialog-head {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  margin-bottom: 18px;
}
.dialog-icon {
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  border-radius: 10px;
  display: grid;
  place-items: center;
  background: var(--accent-soft);
  color: var(--text);
}
.dialog-panel.danger .dialog-icon { background: rgba(239, 68, 68, 0.14); color: var(--danger); }
.dialog-icon [data-lucide], .dialog-icon .lucide { width: 18px; height: 18px; }
.dialog-titles { flex: 1; min-width: 0; }
.dialog-title {
  margin: 0 0 4px;
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  letter-spacing: -0.01em;
}
.dialog-message {
  margin: 0;
  font-size: 13px;
  line-height: 1.55;
  color: var(--text-dim);
  white-space: pre-wrap;
}
.dialog-body { margin-bottom: 16px; }
.dialog-input {
  width: 100%;
  padding: 9px 12px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-size: 13px;
  outline: none;
  transition: border-color 0.1s, box-shadow 0.1s;
}
.dialog-input:focus {
  border-color: var(--selection);
  box-shadow: 0 0 0 3px var(--selection-soft);
}
.dialog-actions {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
}
.dialog-btn {
  padding: 8px 14px;
  border-radius: 7px;
  border: 1px solid var(--border);
  background: var(--bg-3);
  color: var(--text);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.12s, border-color 0.12s, color 0.12s, box-shadow 0.12s;
}
.dialog-btn:focus-visible {
  outline: 2px solid var(--selection);
  outline-offset: 2px;
}

/* Secondary (default): subtle bg shift; text stays high-contrast */
.dialog-btn-secondary {
  background: transparent;
  color: var(--text-dim);
}
.dialog-btn-secondary:hover {
  background: var(--bg-3);
  color: var(--text);
  border-color: var(--border-strong);
}

/* Primary: inverted contrast, hover deepens the bg AND lifts the button.
   Explicitly re-state the text color in :hover so the brightness filter
   never gets a chance to wash it out. */
.dialog-btn-primary {
  background: var(--accent);
  color: var(--accent-on);
  border-color: var(--accent);
  font-weight: 600;
}
.dialog-btn-primary:hover {
  background: var(--accent-2);
  border-color: var(--accent-2);
  color: var(--accent-on);
  box-shadow: 0 2px 8px rgba(0,0,0,0.3);
  transform: translateY(-1px);
}
.dialog-btn-primary:active {
  transform: translateY(0);
  box-shadow: none;
}

.dialog-btn-primary.danger {
  background: var(--danger);
  border-color: var(--danger);
  color: white;
}
.dialog-btn-primary.danger:hover {
  background: #dc2626;
  border-color: #dc2626;
  color: white;
}

/* ---------- Diff modal ---------- */
.diff-modal {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.62);
  backdrop-filter: blur(4px);
  display: grid;
  place-items: center;
  z-index: 10000;
  padding: 24px;
  animation: diff-fade 0.18s ease-out;
}
@keyframes diff-fade { from { opacity: 0; } to { opacity: 1; } }

.diff-panel {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 12px;
  width: min(1200px, 100%);
  height: min(900px, 90vh);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0,0,0,0.5);
}
.diff-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  background: var(--bg-3);
  border-bottom: 1px solid var(--border);
  gap: 12px;
  flex-wrap: wrap;
}
.diff-title { display: inline-flex; align-items: center; gap: 8px; font-size: 13px; }
.diff-label {
  padding: 2px 8px;
  border-radius: 4px;
  font-family: var(--mono);
  font-size: 11.5px;
  background: var(--bg);
  border: 1px solid var(--border);
}
.diff-label-old { color: var(--text-dim); }
.diff-label-new { color: var(--text); font-weight: 600; }
.diff-arrow { width: 14px; height: 14px; color: var(--text-faint); }
.diff-stats { display: inline-flex; gap: 6px; margin-left: 6px; font-family: var(--mono); font-size: 11px; }
.diff-stat-add { color: #22c55e; }
.diff-stat-del { color: #ef4444; }

.diff-actions { display: inline-flex; align-items: center; gap: 4px; }
.diff-spacer { width: 1px; height: 20px; background: var(--border); margin: 0 4px; }
.diff-action-btn, .diff-mode-btn, .diff-close {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 5px 9px;
  background: transparent;
  border: 1px solid transparent;
  border-radius: 5px;
  cursor: pointer;
  color: var(--text);
  font-size: 12px;
  transition: background 0.1s, border-color 0.1s, color 0.1s;
}
.diff-action-btn:hover, .diff-mode-btn:hover, .diff-close:hover {
  background: var(--bg-hover);
}
.diff-mode-btn.active { background: var(--bg); border-color: var(--border); }
.diff-action-btn [data-lucide], .diff-action-btn .lucide,
.diff-mode-btn [data-lucide], .diff-mode-btn .lucide,
.diff-close [data-lucide], .diff-close .lucide { width: 14px; height: 14px; }
.diff-action-primary {
  background: var(--accent);
  color: var(--accent-on);
  border-color: var(--accent);
}
.diff-action-primary:hover { background: var(--accent); filter: brightness(0.92); border-color: var(--accent); }

.diff-body {
  flex: 1;
  overflow: auto;
  padding: 0;
  font-family: var(--mono);
  font-size: 12px;
  line-height: 1.5;
  background: var(--bg);
  min-height: 0;
}
.diff-body .diff-line {
  display: grid;
  grid-template-columns: 48px 48px 24px 1fr;
  padding: 0 0 0 8px;
  white-space: pre;
  min-height: 18px;
  border-left: 3px solid transparent;
  color: var(--text);
}
/* Unified view only: grow each row to its content width so the added/removed
   highlight background covers the whole line when scrolled horizontally
   (min-width keeps short lines filling the viewport). Not applied to split,
   where lines must stay within their column. */
.diff-body[data-view="unified"] .diff-line {
  width: max-content;
  min-width: 100%;
}
.diff-body .diff-num {
  text-align: right;
  padding-right: 8px;
  color: var(--text-faint);
  user-select: none;
  font-variant-numeric: tabular-nums;
}
.diff-body .diff-sigil {
  text-align: center;
  color: var(--text-faint);
  user-select: none;
  font-weight: 700;
}
.diff-body .diff-content {
  color: inherit;
  overflow-x: visible;
}
.diff-body .diff-line.context { color: var(--text-dim); }
.diff-body .diff-line.added {
  background: rgba(34, 197, 94, 0.18) !important;
  border-left-color: #22c55e !important;
  color: #4ade80 !important;
}
.diff-body .diff-line.added .diff-sigil { color: #22c55e !important; }
.diff-body .diff-line.added .diff-num { color: rgba(34, 197, 94, 0.7); background: rgba(34, 197, 94, 0.08); }
.diff-body .diff-line.removed {
  background: rgba(239, 68, 68, 0.18) !important;
  border-left-color: #ef4444 !important;
  color: #f87171 !important;
}
.diff-body .diff-line.removed .diff-sigil { color: #ef4444 !important; }
.diff-body .diff-line.removed .diff-num { color: rgba(239, 68, 68, 0.7); background: rgba(239, 68, 68, 0.08); }
.diff-body .diff-line.empty {
  background: repeating-linear-gradient(135deg,
    transparent 0, transparent 6px,
    var(--bg-3) 6px, var(--bg-3) 7px);
  min-height: 18px;
}

/* Light theme: darker green/red text for legibility on white */
html[data-theme="light"] .diff-body .diff-line.added { color: #15803d !important; }
html[data-theme="light"] .diff-body .diff-line.removed { color: #b91c1c !important; }

/* Split / side-by-side view: row-based grid where pairs of cells fill
   two columns; gap rows span the full width via grid-column: 1 / -1.
   minmax(0,1fr) is critical — without it, the intrinsic width of a long
   <pre>-content line blows out the column and overlaps its neighbor. */
.diff-body.split { display: block; padding: 0; }
.diff-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 0;
  min-height: 100%;
  border-top: 1px solid var(--border);
}
.diff-split > .diff-line {
  /* split cells emit exactly two elements (num + content); the grid must
     match or content lands in a too-narrow track and collapses. */
  grid-template-columns: 48px minmax(0, 1fr);
  padding-left: 0;
  border-left: 3px solid transparent;
  border-right: 1px solid var(--border);
  min-width: 0;
  overflow: hidden;
}
.diff-split > .diff-line > .diff-content {
  /* Wrap long lines inside the cell rather than giving every overflowing
     line its own horizontal scrollbar. The grid keeps each left/right pair
     in one row, so a wrapped cell stays vertically aligned with its mate. */
  min-width: 0;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  word-break: break-word;
}
.diff-split > .diff-line:nth-child(2n) { border-right: none; }

/* Collapsed-region gap row — clickable to expand */
.diff-gap {
  background: var(--bg-3);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  margin: 0;
}
.diff-gap-full { grid-column: 1 / -1; }
.diff-gap-btn {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 6px 12px;
  background: transparent;
  border: none;
  color: var(--text-faint);
  font-size: 11.5px;
  font-family: var(--mono);
  cursor: pointer;
  transition: background 0.12s, color 0.12s;
}
.diff-gap-btn:hover {
  background: var(--bg-hover);
  color: var(--text);
}
.diff-gap-btn [data-lucide], .diff-gap-btn .lucide {
  width: 14px;
  height: 14px;
  opacity: 0.7;
}
.diff-gap-btn:hover [data-lucide], .diff-gap-btn:hover .lucide { opacity: 1; }

/* Collapse toggle button in header — distinct from view toggles */
.diff-collapse-toggle.active {
  background: var(--selection-soft);
  border-color: var(--selection);
  color: var(--selection);
}

/* ---------- SEO content on empty state landing ---------- */
.seo-content {
  width: 100%;
  padding: 64px 24px 96px;
  border-top: 1px solid var(--border);
  background: linear-gradient(180deg, transparent 0%, rgba(0,0,0,0.04) 100%);
}
html[data-theme="dark"] .seo-content {
  background: linear-gradient(180deg, transparent 0%, rgba(255,255,255,0.02) 100%);
}
.seo-inner {
  max-width: 760px;
  margin: 0 auto;
  color: var(--text-dim);
  line-height: 1.6;
  font-size: 15px;
}
.seo-inner h2 {
  margin: 40px 0 12px;
  font-size: 22px;
  font-weight: 600;
  color: var(--text);
  letter-spacing: -0.01em;
}
.seo-inner h2:first-child { margin-top: 0; }
.seo-inner p { margin: 0 0 14px; }
.seo-inner code {
  font-family: var(--mono, ui-monospace, SFMono-Regular, Menlo, monospace);
  font-size: 13px;
  background: var(--bg-2);
  padding: 1px 6px;
  border-radius: 4px;
  border: 1px solid var(--border);
}
.seo-inner kbd {
  font-family: var(--mono, ui-monospace, SFMono-Regular, Menlo, monospace);
  font-size: 12px;
  background: var(--bg-2);
  padding: 1px 6px;
  border-radius: 4px;
  border: 1px solid var(--border);
  border-bottom-width: 2px;
}
.seo-features {
  margin: 0 0 14px;
  padding: 0;
  list-style: none;
}
.seo-features li {
  padding: 8px 0;
  border-bottom: 1px solid var(--border);
}
.seo-features li:last-child { border-bottom: 0; }
.seo-features strong { color: var(--text); font-weight: 600; }
.seo-inner details {
  margin: 6px 0;
  padding: 10px 14px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.seo-inner details summary {
  cursor: pointer;
  color: var(--text);
  font-weight: 500;
  list-style: none;
}
.seo-inner details summary::-webkit-details-marker { display: none; }
.seo-inner details summary::before {
  content: "+";
  display: inline-block;
  width: 16px;
  color: var(--text-faint);
  font-weight: 400;
}
.seo-inner details[open] summary::before { content: "−"; }
.seo-inner details p { margin: 10px 0 0; padding-left: 16px; }
.seo-inner a { color: var(--accent, #4a9eff); text-decoration: none; }
.seo-inner a:hover { text-decoration: underline; }

.noscript-fallback {
  position: fixed; inset: 0;
  padding: 40px;
  background: #0a0a0a;
  color: #fafafa;
  font-family: system-ui, -apple-system, sans-serif;
  line-height: 1.6;
  overflow-y: auto;
}
.noscript-fallback h1 { font-size: 32px; margin: 0 0 16px; }
.noscript-fallback a { color: #4a9eff; }

/* Scrollbars */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
  background: var(--bg-3);
  border-radius: 5px;
  border: 2px solid var(--bg-2);
}
::-webkit-scrollbar-thumb:hover { background: var(--border-strong); }
/* Traditional Chinese edition — brighter surfaces, restrained color. */
:root {
 --sans: "Segoe UI", "Microsoft JhengHei", "PingFang TC", system-ui, sans-serif;
 --sidebar-w: 240px; --sidebar-r-w: 286px; --statusbar-h: 34px;
 --radius: 12px; --radius-sm: 8px;
}
html[data-theme="light"] {
 --bg:#f5f7fc; --bg-2:#ffffff; --bg-3:#eef2fa; --bg-hover:#e6ebf8;
 --border:#dfe5f0; --border-strong:#bdc8df; --text:#25314a;
 --text-dim:#596780; --text-faint:#67758e; --accent:#6257d9;
 --accent-2:#4e44bd; --accent-soft:#eeecff; --accent-on:#ffffff;
 --selection:#6257d9; --selection-soft:rgba(98,87,217,.09);
 --selection-glow:rgba(98,87,217,.17); --hover:#8580e8;
 --success:#16816e; --warn:#a36113; --danger:#c64059;
 --shadow:0 8px 28px rgba(48,65,105,.09);
}
html[data-theme="dark"] {
 --bg:#20283b; --bg-2:#293349; --bg-3:#333f58; --bg-hover:#3f4b67;
 --border:#43516c; --border-strong:#647492; --text:#f0f3ff;
 --text-dim:#c6cee2; --text-faint:#a7b5cf; --accent:#b9b1ff;
 --accent-2:#cdc7ff; --accent-soft:rgba(185,177,255,.14); --accent-on:#252047;
 --success:#6ed7bd; --shadow:0 8px 28px rgba(0,0,0,.17);
}
body,button,input,select,textarea {font-family:var(--sans)}
.empty-state {background:var(--bg)}
.empty-state > .empty-inner {min-height:690px;background:radial-gradient(ellipse at 15% 20%,rgba(150,139,248,.13),transparent 52%),radial-gradient(ellipse at 85% 70%,rgba(80,192,177,.12),transparent 50%);padding:64px 24px 50px}
.empty-inner {max-width:1000px}
.eyebrow {font-size:13px;font-weight:600;color:var(--accent);letter-spacing:.18em;margin:20px 0}
.empty-inner h1 {font-size:clamp(30px,4.2vw,56px);letter-spacing:-.035em;line-height:1.35;margin:0 0 22px}
.empty-inner .empty-tagline {font-size:17px;line-height:1.9;max-width:650px;color:var(--text-dim)}
.empty-logo,.brand-mark {background:linear-gradient(135deg,#7669e7,#4e84cf);color:white;box-shadow:0 8px 24px rgba(98,87,217,.16)}
.empty-logo {border-radius:18px;width:60px;height:60px}
.empty-logo .lucide {animation:none}
.empty-actions {gap:16px;margin-top:30px;flex-wrap:wrap;justify-content:center}
.empty-actions .btn {min-width:208px;min-height:114px;padding:20px 24px;border-radius:16px;background:var(--bg-2);border:1px solid var(--border);box-shadow:var(--shadow);transition:transform .18s,box-shadow .18s}
.empty-actions .btn-primary {background:var(--accent);border-color:var(--accent);color:white}
.empty-actions .btn small {font-size:12px;line-height:1.5}
.empty-actions .btn > span {font-size:15px}
.empty-shortcuts {line-height:2.2;color:var(--text-dim)}
.seo-content {background:var(--bg-2);border-top:1px solid var(--border)}
.seo-inner {max-width:960px;padding:44px 24px;margin:auto}
.seo-inner h2 {font-size:23px;letter-spacing:-.02em}
.intro-grid {display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin:26px 0 42px}
.intro-grid article {border-top:3px solid var(--accent-soft);padding-top:10px}
.intro-grid h3 {font-size:16px}.intro-grid p,.author-credit {font-size:14px;line-height:1.9;color:var(--text-dim)}
.author-credit a {color:var(--accent);text-decoration:underline;text-underline-offset:3px}
.editor {grid-template-rows:auto minmax(0,1fr) auto;height:100dvh}
.toolbar {display:grid;grid-template-columns:minmax(0,1fr) auto;padding:10px 16px;gap:9px 16px;background:var(--bg-2);box-shadow:0 2px 10px rgba(50,60,100,.03);z-index:5}
.toolbar-left {grid-column:1;min-width:0;gap:10px}
.toolbar-right {grid-column:2;grid-row:1;justify-content:flex-end;flex-wrap:wrap}
.toolbar-center {grid-column:1 / -1;grid-row:2;border-top:1px solid var(--border);padding-top:8px;gap:7px;flex-wrap:wrap}
.brand {border:0;margin:0;padding:0 10px 0 0;flex-shrink:0}
.brand-mark {width:30px;height:30px;border-radius:9px}
.brand-text {font-size:14px;font-weight:700;letter-spacing:0;color:var(--text)}
.mode-toggle {border-radius:10px;padding:4px}.mode-btn {font-size:12px;padding:7px 12px}
.file-info {gap:3px;min-width:0}.file-name {max-width:230px}.save-status {font-size:11px;line-height:1.4}
.tool-btn {min-height:32px}.tool-btn.primary {box-shadow:0 3px 9px rgba(98,87,217,.15)}
.workspace {grid-template-columns:var(--sidebar-w) minmax(0,1fr) var(--sidebar-r-w);min-width:0}
.sidebar {background:var(--bg-2)}
.sidebar-tabs {padding:7px 8px;gap:5px;background:var(--bg-2)}
.tab {border-radius:8px;font-size:13px;letter-spacing:0;padding:10px 8px}
.tab.active {background:var(--accent-soft);color:var(--accent);border-color:transparent}
.search-input {padding:10px 12px;font-size:13px;border-radius:10px;background:var(--bg)}
.block-category {font-size:12px;font-weight:700;color:var(--text-dim);letter-spacing:.06em;margin-top:18px}
.block-item {border-radius:11px;background:var(--bg-2);border:1px solid var(--border);padding:13px 8px;box-shadow:0 2px 5px rgba(50,60,100,.025)}
.block-item:hover {border-color:var(--accent);background:var(--accent-soft);transform:translateY(-2px)}
.block-icon {color:var(--accent)}.block-name {font-size:12px;line-height:1.55}
.canvas-wrap {background-color:var(--bg);background-image:radial-gradient(var(--border-strong) .7px,transparent .7px);background-size:20px 20px;padding:24px;min-width:0}
.canvas-frame {box-shadow:0 10px 34px rgba(43,59,97,.12);border:1px solid var(--border);border-radius:12px;overflow:hidden}
.props {padding:16px}.prop-group h4 {font-size:12px;letter-spacing:.04em;color:var(--accent)}
.prop-row {grid-template-columns:82px minmax(0,1fr);gap:8px}.prop-row label {font-size:12px;color:var(--text-dim)}
.props input,.props select,.props textarea {font-size:12px;border-radius:7px;min-height:30px}
.statusbar {height:auto;min-height:34px;gap:12px;flex-wrap:wrap;padding:6px 12px;font-size:11px;background:var(--bg-2)}
.breadcrumbs {min-width:0;overflow:auto}.status-right {margin-left:auto;white-space:normal}
.about-btn {border:0;background:transparent;color:var(--accent);cursor:pointer;font:inherit;white-space:nowrap}
#about-dialog {max-width:560px;width:calc(100% - 40px);border:1px solid var(--border);border-radius:20px;background:var(--bg-2);color:var(--text);padding:30px;box-shadow:var(--shadow)}
#about-dialog::backdrop {background:rgba(30,40,65,.3);backdrop-filter:blur(4px)}
#about-dialog h2 {font-size:21px;margin-top:12px}#about-dialog p {line-height:1.9;font-size:14px}#about-close {float:right}
button:focus-visible,a:focus-visible,.block-item:focus-visible {outline:3px solid var(--selection);outline-offset:3px}
@media(max-width:1100px){:root{--sidebar-w:200px;--sidebar-r-w:250px}.toolbar{padding:8px 10px}.brand-text{display:none}.file-name{max-width:160px}.canvas-wrap{padding:16px}}
@media(max-width:760px){.toolbar{grid-template-columns:1fr}.toolbar-left{grid-column:1;flex-wrap:wrap}.toolbar-right{grid-column:1;grid-row:2;justify-content:flex-start}.toolbar-center{grid-row:3}.workspace{overflow:auto;grid-template-columns:180px minmax(300px,1fr) 240px}.intro-grid{grid-template-columns:1fr}.empty-state > .empty-inner{padding-top:40px}.empty-actions{flex-direction:column}.empty-actions .btn{width:100%}.statusbar{font-size:10px}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}

/* Persistent language selection, available before and during editing. */
.empty-language {position:absolute;top:22px;right:28px;z-index:2}
.language-control {display:inline-flex;align-items:center;gap:7px;color:var(--text-dim);font-size:12px;white-space:nowrap}
.language-select {font:inherit;color:var(--text);background:var(--bg-2);border:1px solid var(--border);border-radius:8px;padding:7px 8px;cursor:pointer;max-width:125px}
.toolbar-right .language-control > span {position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%)}
.toolbar-right .language-select {max-width:108px}
@media(max-width:1200px){.toolbar-left .file-name{max-width:140px}.brand-text{display:none}.toolbar{gap:8px}.toolbar-right{gap:2px}}
@media(max-width:760px){.empty-language{top:12px;right:12px}.empty-state > .empty-inner{padding-top:80px}}

/* Full-width homepage backdrop; content stays readable. */
.empty-state, html[data-theme="light"] .empty-state {
 background:radial-gradient(ellipse at 15% 20%,rgba(150,139,248,.13),transparent 52%),radial-gradient(ellipse at 85% 70%,rgba(80,192,177,.12),transparent 50%),var(--bg);
}
.empty-state > .empty-inner {background:transparent}

.empty-logo {background:none!important;box-shadow:none!important;width:104px!important;height:104px!important;border-radius:0!important}.empty-logo img,.brand-cat {object-fit:contain;display:block}

/* Charlie's Lab branding. The original editor controls stay unchanged. */
.lab-topbar {
  position: sticky;
  top: 0;
  z-index: 12;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 78px;
  padding: 13px clamp(18px, 4vw, 64px);
  background: rgba(255, 255, 255, .95);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 5px 16px rgba(44, 55, 92, .045);
}
html[data-theme="dark"] .lab-topbar { background: rgba(41, 51, 73, .95); }
.lab-identity {
  display: inline-flex;
  align-items: center;
  flex-shrink: 0;
  gap: 11px;
  color: var(--text);
  text-decoration: none;
  font-size: 17px;
  font-weight: 800;
  letter-spacing: -.025em;
  white-space: nowrap;
}
.lab-identity img { width: 38px; height: 38px; object-fit: contain; }
.lab-identity-copy { display: flex; flex-direction: column; gap: 3px; }
.lab-identity-copy small {
  font-size: 10px;
  letter-spacing: .09em;
  color: var(--text-faint);
  font-weight: 600;
}
.lab-nav { display: flex; align-items: center; gap: clamp(14px, 2.8vw, 28px); }
.lab-nav > a {
  color: var(--text-dim);
  text-decoration: none;
  font-size: 13px;
  font-weight: 650;
  white-space: nowrap;
}
.lab-nav > a:hover { color: var(--accent); }
.language-control .language-icon {
  width: 16px;
  height: 16px;
  flex: 0 0 16px;
  color: var(--text-dim);
  pointer-events: none;
}
.lab-topbar .language-control > span {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
}
.empty-state > .empty-inner { min-height: 640px; }
.lab-origin {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 26px 30px;
  margin: 28px 0 40px;
}
.lab-origin h2 { margin-top: 8px; }
.lab-origin-kicker {
  font-size: 11px;
  font-weight: 750;
  color: var(--accent);
  letter-spacing: .1em;
}
.lab-origin p a { font-weight: 700; }

/* The earlier responsive rule hid this at 1200px and the subtitle became inline
   with the name when an old cached stylesheet was used. Define both explicitly. */
.toolbar .brand { display: inline-flex; gap: 10px; min-width: 0; flex-shrink: 0; }
.toolbar .brand-text {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
  color: var(--text);
  font-size: 13px;
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: 0;
  text-transform: none;
  white-space: nowrap;
}
.toolbar .brand-text small {
  display: block;
  font-size: 10px;
  line-height: 1.2;
  color: var(--text-faint);
  font-weight: 500;
  letter-spacing: .015em;
}
@media(max-width:1100px) {
  .toolbar .brand-text { font-size: 12px; }
  .toolbar .brand-text small { font-size: 9px; }
}
@media(max-width:760px) {
  .lab-topbar { flex-wrap: wrap; padding: 14px 17px; gap: 12px; }
  .lab-nav { justify-content: space-between; width: 100%; gap: 10px; }
  .lab-nav > a { font-size: 12px; }
  .empty-state > .empty-inner { min-height: 600px; padding-top: 50px; }
  .empty-actions {
    grid-template-columns: minmax(0, 1fr);
    width: min(100%, 340px);
    max-width: 340px;
    margin-left: auto;
    margin-right: auto;
  }
  .empty-actions .btn { width: 100%; min-width: 0; }
  .lab-origin { padding: 20px 18px; }
  .toolbar .brand { margin-right: 4px; }
}