/* Low Gravitas Theme page — palette strip, IDE mock, terminal mock.
   Uses vendor/low-gravitas.css tokens directly (--lgz-* raw + --bg / --surface /
   --text / --accent / --selection-* / --link semantic aliases) so the demo
   always shows the authoritative theme palette, not a site-accent approximation.
   Each demo section has its own [data-theme] attribute so visitors can flip
   dark/light independently of the site theme. */

@layer pages {

  /* ── Per-section header + toggle ──────────────────────────────────────────
     Three-column grid keeps the h2 centered while the toggle floats right. */
  .demo-section-head {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    align-items: center;
    gap: 16px;
    max-width: 960px;
    margin: 0 auto 20px;
    padding: 0 24px;
  }
  .demo-section-head h2 {
    grid-column: 2;
    color: var(--lg-accent-fg);
    margin: 0;
  }
  .demo-section-head .segmented {
    grid-column: 3;
    justify-self: end;
  }

  /* ── Palette strip ───────────────────────────────────────────────────────
     Pair 'foo' directly above 'bright-foo' by forcing 8 columns on
     non-narrow screens. Below ~680px, fall back to auto-fit so tiles stay
     readable; pairing breaks on mobile but that's accepted. */
  .palette-strip {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(72px, 1fr));
    gap: 6px;
    max-width: 960px;
    margin: 0 auto 48px;
  }
  @media (min-width: 680px) {
    .palette-strip {
      grid-template-columns: repeat(8, 1fr);
    }
  }
  .swatch-cell {
    position: relative;
    aspect-ratio: 1;
    border-radius: var(--radius-sm);
    border: 1px solid var(--lg-border-subtle);
    display: flex;
    align-items: flex-end;
    padding: 6px;
    font-family: var(--font-mono);
    font-size: 9px;
    overflow: hidden;
    cursor: default;
  }
  .swatch-cell .label {
    background: rgba(0, 0, 0, 0.55);
    color: #fff;
    padding: 1px 4px;
    border-radius: 3px;
    position: relative;
    z-index: 2;
  }
  /* Hex overlay appears on hover/focus — uses attr() to pull the
     per-variant hex from data-dark / data-light. */
  .swatch-cell::after {
    content: attr(data-dark);
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-mono);
    font-size: 10px;
    background: rgba(0, 0, 0, 0.72);
    color: #fff;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    opacity: 0;
    transition: opacity var(--dur-fast) var(--ease-out);
    pointer-events: none;
  }
  .demo[data-theme="light"] .swatch-cell::after {
    content: attr(data-light);
    background: rgba(255, 255, 255, 0.8);
    color: #000;
  }
  .swatch-cell:hover::after,
  .swatch-cell:focus-visible::after { opacity: 1; }

  /* ── IDE mock ──────────────────────────────────────────────────────────── */
  .ide-mock {
    max-width: 900px;
    margin: 0 auto 32px;
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-raised);
    overflow: hidden;
    font-family: var(--font-mono);
    font-size: var(--text-sm);
    background: var(--bg);
    color: var(--text);
  }
  .ide-titlebar {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 14px;
    border-bottom: 1px solid var(--border-dim);
    font-size: var(--text-xs);
    background: var(--surface-raised);
    color: var(--text-dim);
  }
  .ide-dots { display: flex; gap: 6px; }
  .ide-dots span {
    width: 10px; height: 10px;
    border-radius: 50%;
    display: inline-block;
  }
  .ide-dots span:nth-child(1) { background: var(--lgz-red); }
  .ide-dots span:nth-child(2) { background: var(--lgz-yellow); }
  .ide-dots span:nth-child(3) { background: var(--lgz-green); }
  .ide-body {
    display: grid;
    grid-template-columns: 200px 1fr;
    min-height: 320px;
  }
  .ide-sidebar {
    border-right: 1px solid var(--border-dim);
    padding: 10px 0;
    font-size: var(--text-xs);
    background: var(--surface);
    color: var(--text-dim);
  }
  .ide-sidebar .dir { padding: 2px 12px; color: var(--lgz-yellow); }
  .ide-sidebar .file {
    padding: 2px 12px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }
  .ide-sidebar .file.active {
    background: var(--bg);
    color: var(--lgz-bright-white);
  }
  .ide-editor {
    background: var(--bg);
    color: var(--text);
    display: flex;
    flex-direction: column;
    min-width: 0;
  }
  .ide-tabs {
    display: flex;
    gap: 0;
    background: var(--surface);
    border-bottom: 1px solid var(--border-dim);
  }
  .ide-tab {
    padding: 6px 14px;
    font-size: var(--text-xs);
    color: var(--text-dim);
    border-right: 1px solid var(--border-dim);
    border-bottom: 2px solid transparent;
    margin-bottom: -1px;
  }
  .ide-tab.active {
    background: var(--bg);
    color: var(--lgz-bright-white);
    border-bottom-color: var(--accent);
  }
  .ide-code {
    flex: 1;
    padding: 10px 14px;
    overflow-x: auto;
    line-height: 1.6;
  }
  .ide-code pre,
  .ide-code code {
    font-family: inherit;
    background: none;
    border: none;
    padding: 0;
    margin: 0;
    white-space: pre;
    color: var(--text);
  }
  /* Line-wrapper spans emitted by code-samples.html (each wraps one source
     line and contains a leading .line-num). :has() isolates this to those
     outer wrappers so inline token spans in hand-authored <br>-separated
     markup aren't forced to block. white-space: pre preserves intra-line
     indentation without collapsing inter-line newlines into extra height. */
  .ide-code > span:has(> .line-num) {
    display: block;
    white-space: pre;
  }
  .ide-statusbar {
    display: flex;
    justify-content: space-between;
    padding: 6px 14px;
    border-top: 1px solid var(--border-dim);
    font-size: 11px;
    background: var(--surface-raised);
    color: var(--text-dim);
  }

  /* ── Terminal mock ─────────────────────────────────────────────────────── */
  .terminal-mock {
    max-width: 900px;
    margin: 0 auto;
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-raised);
    overflow: hidden;
    font-family: var(--font-mono);
    font-size: var(--text-sm);
    background: var(--bg);
    color: var(--text);
  }
  .terminal-body {
    padding: 14px 18px;
    line-height: 1.55;
  }

  /* ── Syntax tokens emitted by upstream code-samples.html ─────────────── */
  .tk-keyword  { color: var(--lgz-bright-red); }
  .tk-string   { color: var(--lgz-green); }
  .tk-comment  { color: var(--lgz-blue); font-style: italic; }
  .tk-number   { color: var(--lgz-bright-yellow); }
  .tk-function { color: var(--lgz-bright-blue); }
  .tk-type     { color: var(--lgz-yellow); }
  .tk-variable { color: var(--lgz-bright-magenta); }

  .line-num {
    display: inline-block;
    width: 2.5em;
    text-align: right;
    padding-right: 1em;
    color: var(--text-dim);
    user-select: none;
    -webkit-user-select: none;
  }
  .selected-text {
    background: var(--selection-bg);
    color: var(--selection-fg);
    border-radius: 2px;
  }
  .cursor-line { background: var(--surface); display: block; }
  .cursor-bar {
    display: inline-block;
    width: 2px;
    height: 1em;
    background: var(--lgz-cursor);
    vertical-align: text-bottom;
    margin-left: 2px;
    animation: cursor-blink 1.1s steps(2) infinite;
  }
  @keyframes cursor-blink {
    50% { opacity: 0; }
  }

  /* Terminal output classes — shell output coloring */
  .term-ok   { color: var(--lgz-green); }
  .term-err  { color: var(--lgz-red); }
  .term-warn { color: var(--lgz-yellow); }
  .term-info { color: var(--lgz-blue); }

  /* ── Responsive ───────────────────────────────────────────────────────── */
  @media (max-width: 640px) {
    .ide-body { grid-template-columns: 1fr; }
    .ide-sidebar { display: none; }
  }

  @media (prefers-reduced-motion: reduce) {
    .cursor-bar { animation: none; }
  }
}