/* ============================================================
   Lumino Design Site — Shared chrome (header, nav, layout)
   ============================================================ */

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--color-surface-base);
  color: var(--color-text-primary);
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
}
a { color: inherit; text-decoration: none; }
button { font-family: inherit; color: inherit; cursor: pointer; }

/* ── Topbar ─────────────────────────────────────────────── */
.lds-top {
  position: sticky; top: 0; z-index: var(--z-sticky);
  display: flex; align-items: center; gap: 20px;
  padding: 0 20px; height: 56px;
  background: color-mix(in oklab, var(--color-surface-panel) 85%, transparent);
  backdrop-filter: blur(18px) saturate(1.1);
  -webkit-backdrop-filter: blur(18px) saturate(1.1);
  border-bottom: 1px solid var(--color-border-hairline);
}
.lds-brand { display: flex; align-items: center; gap: 10px; }
.lds-brand-text { display: flex; flex-direction: column; line-height: 1.05; }
.lds-brand-name { font-family: var(--font-display); font-size: 16px; font-weight: 500; letter-spacing: -0.01em; color: var(--color-text-primary); }
.lds-brand-sub { font-family: var(--font-mono); font-size: 9.5px; letter-spacing: 0.14em; color: var(--color-text-tertiary); text-transform: uppercase; }

.lds-top-nav { display: flex; align-items: center; gap: 4px; margin-left: 16px; }
.lds-top-nav a {
  padding: 6px 12px; border-radius: var(--radius-md);
  font-size: 13px; color: var(--color-text-secondary);
  transition: color 140ms, background 140ms;
}
.lds-top-nav a:hover { color: var(--color-text-primary); background: var(--color-surface-elevated); }
.lds-top-nav a.active { color: var(--color-accent); background: var(--color-accent-faint); }

.lds-top-right { margin-left: auto; display: flex; align-items: center; gap: 10px; }
.lds-search-btn {
  display: inline-flex; align-items: center; gap: 10px;
  height: 34px; padding: 0 12px;
  background: var(--color-surface-elevated);
  border: 1px solid var(--color-border-hairline);
  border-radius: var(--radius-md);
  color: var(--color-text-tertiary); font-size: 12px;
  min-width: 240px;
}
.lds-search-btn:hover { border-color: var(--color-border-stronger); color: var(--color-text-secondary); }
.lds-search-btn kbd {
  margin-left: auto; font-family: var(--font-mono); font-size: 10px;
  padding: 2px 6px; border-radius: var(--radius-xs);
  background: var(--color-surface-base); border: 1px solid var(--color-border-hairline);
  color: var(--color-text-tertiary);
}

/* ── Theme pills ─────────────────────────────────────────── */
.lds-theme-pills {
  display: inline-flex; gap: 2px; padding: 2px;
  background: var(--color-surface-elevated);
  border: 1px solid var(--color-border-hairline);
  border-radius: var(--radius-pill);
}
.lds-theme-pill {
  padding: 4px 10px; font-size: 11px; letter-spacing: 0.04em; text-transform: uppercase;
  border-radius: var(--radius-pill); color: var(--color-text-tertiary);
  background: transparent; border: none; font-family: var(--font-mono);
  transition: color 140ms, background 140ms;
}
.lds-theme-pill.active { color: var(--color-accent-ink); background: var(--color-accent); }
.lds-theme-pill:hover:not(.active) { color: var(--color-text-primary); }

.lds-mode-toggle, .lds-density-toggle {
  width: 34px; height: 34px; display: inline-flex; align-items: center; justify-content: center;
  background: var(--color-surface-elevated);
  border: 1px solid var(--color-border-hairline);
  border-radius: var(--radius-md);
  color: var(--color-text-secondary);
  transition: color 140ms, border-color 140ms;
}
.lds-mode-toggle:hover, .lds-density-toggle:hover { color: var(--color-text-primary); border-color: var(--color-border-stronger); }

/* ── Shell layout ─────────────────────────────────────── */
.lds-shell { display: grid; grid-template-columns: var(--nav-w) 1fr; min-height: calc(100vh - 56px); }
.lds-side {
  padding: 24px 12px; border-right: 1px solid var(--color-border-hairline);
  position: sticky; top: 56px; height: calc(100vh - 56px); overflow-y: auto;
}
.lds-side-section { margin-bottom: 22px; }
.lds-side-label {
  font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.12em;
  color: var(--color-text-tertiary); text-transform: uppercase;
  padding: 4px 10px; margin-bottom: 6px;
}
.lds-side a {
  display: flex; align-items: center; gap: 10px;
  padding: 7px 10px; border-radius: var(--radius-sm);
  font-size: 13px; color: var(--color-text-secondary);
  transition: color 140ms, background 140ms;
}
.lds-side a:hover { color: var(--color-text-primary); background: var(--color-surface-elevated); }
.lds-side a.active { color: var(--color-accent); background: var(--color-accent-faint); }
.lds-side a .lds-side-icon { opacity: 0.7; }
.lds-side a.active .lds-side-icon { opacity: 1; }

.lds-main { padding: 40px 48px 80px; max-width: 1200px; width: 100%; }

@media (max-width: 1000px) {
  .lds-shell { grid-template-columns: 1fr; }
  .lds-side { display: none; }
  .lds-main { padding: 28px 20px 60px; }
  .lds-top-nav { display: none; }
  .lds-search-btn { min-width: 0; width: 34px; padding: 0; justify-content: center; }
  .lds-search-btn span, .lds-search-btn kbd { display: none; }
}

/* ── Page head ────────────────────────────────────────── */
.lds-eyebrow {
  font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.14em;
  color: var(--color-accent); text-transform: uppercase; margin-bottom: 14px;
}
.lds-h1 {
  font-family: var(--font-display); font-size: 52px; font-weight: var(--hero-weight);
  letter-spacing: -0.02em; line-height: 1.05; margin: 0 0 18px;
  color: var(--color-text-primary);
}
.lds-lead {
  font-size: 17px; line-height: 1.55; color: var(--color-text-secondary);
  max-width: 720px; margin: 0 0 28px;
}
.lds-h2 {
  font-family: var(--font-display); font-size: 32px; font-weight: 400;
  letter-spacing: -0.01em; margin: 56px 0 14px; color: var(--color-text-primary);
}
.lds-h3 {
  font-size: 18px; font-weight: 600; letter-spacing: -0.005em;
  margin: 32px 0 10px; color: var(--color-text-primary);
}
.lds-p { font-size: 14px; line-height: 1.6; color: var(--color-text-secondary); max-width: 720px; margin: 0 0 12px; }

/* ── Cards, chips, tags ────────────────────────────────── */
.lds-card {
  background: var(--color-surface-panel);
  border: 1px solid var(--color-border-hairline);
  border-radius: var(--radius-lg);
  padding: 20px;
  transition: border-color 180ms, transform 180ms;
}
.lds-card:hover { border-color: var(--color-border-stronger); }
.lds-card-title { font-family: var(--font-display); font-size: 18px; font-weight: 500; margin: 0 0 6px; letter-spacing: -0.005em; }
.lds-card-sub { font-size: 12px; color: var(--color-text-tertiary); margin: 0 0 14px; }

.lds-chip {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 3px 9px; border-radius: var(--radius-pill);
  background: var(--color-surface-elevated);
  border: 1px solid var(--color-border-hairline);
  color: var(--color-text-secondary);
  font-size: 11px; font-family: var(--font-mono); letter-spacing: 0.04em;
}
.lds-chip.accent { background: var(--color-accent-faint); border-color: var(--color-accent-glow); color: var(--color-accent); }

/* ── Buttons ───────────────────────────────────────────── */
.lds-btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 8px 14px; border-radius: var(--radius-button);
  font-size: 13px; font-weight: 500;
  background: var(--color-surface-elevated);
  border: 1px solid var(--color-border-hairline);
  color: var(--color-text-primary);
  transition: all 140ms;
}
.lds-btn:hover { border-color: var(--color-border-stronger); background: var(--color-surface-active); }
.lds-btn.primary { background: var(--color-accent); color: var(--color-accent-ink); border-color: transparent; }
.lds-btn.primary:hover { background: color-mix(in oklab, var(--color-accent) 90%, white 10%); }
.lds-btn.ghost { background: transparent; border-color: transparent; color: var(--color-text-secondary); }
.lds-btn.ghost:hover { background: var(--color-surface-elevated); color: var(--color-text-primary); }
.lds-btn.small { padding: 5px 10px; font-size: 12px; }

/* ── Code blocks ───────────────────────────────────────── */
.lds-code {
  position: relative;
  background: var(--color-surface-base);
  border: 1px solid var(--color-border-hairline);
  border-radius: var(--radius-md);
  padding: 14px 16px;
  font-family: var(--font-mono); font-size: 12.5px; line-height: 1.55;
  color: var(--color-text-secondary);
  overflow-x: auto;
  margin: 14px 0;
}
.lds-code pre { margin: 0; white-space: pre; }
.lds-code .copy {
  position: absolute; top: 10px; right: 10px;
  background: var(--color-surface-elevated);
  border: 1px solid var(--color-border-hairline);
  color: var(--color-text-tertiary);
  font-size: 10.5px; padding: 3px 8px; border-radius: var(--radius-sm);
  font-family: var(--font-mono); letter-spacing: 0.04em;
  opacity: 0; transition: opacity 140ms, color 140ms;
}
.lds-code:hover .copy { opacity: 1; }
.lds-code .copy:hover { color: var(--color-text-primary); }
.lds-code .copy.ok { color: var(--color-success); }

.lds-code-tabs {
  display: flex; gap: 2px; margin: 14px 0 0;
  border-bottom: 1px solid var(--color-border-hairline);
}
.lds-code-tab {
  padding: 7px 12px; font-size: 11px; font-family: var(--font-mono);
  letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--color-text-tertiary); background: transparent; border: none;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
}
.lds-code-tab.active { color: var(--color-accent); border-bottom-color: var(--color-accent); }
.lds-code-tab:hover:not(.active) { color: var(--color-text-secondary); }

/* Syntax highlight (tiny) */
.lds-code .t-k { color: color-mix(in oklab, var(--color-accent) 70%, var(--color-text-primary) 30%); }
.lds-code .t-s { color: var(--color-success); }
.lds-code .t-n { color: var(--color-warning); }
.lds-code .t-c { color: var(--color-text-tertiary); font-style: italic; }
.lds-code .t-p { color: var(--color-info); }

/* ── Tables ───────────────────────────────────────────── */
.lds-table {
  width: 100%; border-collapse: collapse;
  background: var(--color-surface-panel);
  border: 1px solid var(--color-border-hairline);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin: 14px 0;
}
.lds-table th, .lds-table td {
  padding: 10px 14px;
  text-align: left;
  font-size: 13px;
  border-bottom: 1px solid var(--color-border-hairline);
}
.lds-table th {
  background: var(--color-surface-elevated);
  font-family: var(--font-mono); font-size: 10.5px; font-weight: 500;
  letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--color-text-tertiary);
}
.lds-table tr:last-child td { border-bottom: none; }
.lds-table .mono { font-family: var(--font-mono); font-size: 12px; color: var(--color-text-primary); }
.lds-table tr:hover td { background: color-mix(in oklab, var(--color-surface-elevated) 50%, transparent); }

/* ── Swatch ───────────────────────────────────────────── */
.lds-swatch-row {
  display: flex; align-items: center; gap: 14px;
  padding: 10px 12px; border-radius: var(--radius-md);
  transition: background 140ms;
}
.lds-swatch-row:hover { background: var(--color-surface-elevated); }
.lds-swatch {
  width: 48px; height: 48px; border-radius: var(--radius-md);
  border: 1px solid var(--color-border-hairline);
  flex-shrink: 0;
}

/* ── ⌘K Search ────────────────────────────────────────── */
.lds-cmd {
  position: fixed; inset: 0; z-index: var(--z-modal);
  background: color-mix(in oklab, black 50%, transparent);
  backdrop-filter: blur(10px);
  display: flex; align-items: flex-start; justify-content: center;
  padding-top: 14vh;
  animation: lds-fade 180ms var(--ease-out);
}
.lds-cmd-box {
  width: min(640px, 92vw); max-height: 60vh;
  background: var(--color-surface-panel);
  border: 1px solid var(--color-border-stronger);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  display: flex; flex-direction: column;
  overflow: hidden;
}
.lds-cmd-input {
  height: 52px; padding: 0 22px;
  background: transparent; border: none; outline: none;
  font-family: var(--font-body); font-size: 15px;
  color: var(--color-text-primary);
  border-bottom: 1px solid var(--color-border-hairline);
}
.lds-cmd-input::placeholder { color: var(--color-text-tertiary); }
.lds-cmd-results { overflow-y: auto; padding: 8px; }
.lds-cmd-result {
  display: flex; align-items: center; gap: 12px;
  padding: 10px 14px; border-radius: var(--radius-md);
  color: var(--color-text-secondary); cursor: pointer;
}
.lds-cmd-result.focus { background: var(--color-accent-faint); color: var(--color-accent); }
.lds-cmd-result-title { font-weight: 500; }
.lds-cmd-result-sub { font-size: 11px; color: var(--color-text-tertiary); margin-left: auto; font-family: var(--font-mono); }

/* ── Toast ────────────────────────────────────────────── */
.lds-toast {
  position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%);
  background: var(--color-surface-elevated);
  border: 1px solid var(--color-border-stronger);
  border-radius: var(--radius-pill);
  padding: 10px 18px; font-size: 13px;
  color: var(--color-text-primary);
  box-shadow: var(--shadow-md);
  z-index: var(--z-toast);
  animation: lds-toast-in 200ms var(--ease-out);
}

@keyframes lds-fade { from { opacity: 0; } to { opacity: 1; } }
@keyframes lds-toast-in {
  from { opacity: 0; transform: translateX(-50%) translateY(10px); }
  to { opacity: 1; transform: translateX(-50%) translateY(0); }
}

/* Grids */
.lds-grid-2 { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 14px; }
.lds-grid-3 { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 14px; }
.lds-grid-4 { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 12px; }