/* ── Brand tokens ─────────────────────────────────────────────────── */
:root {
  --brand:              #10B981;
  --brand-soft:         rgba(16, 185, 129, 0.10);
  --brand-glow:         rgba(16, 185, 129, 0.05);
  --brand-border:       rgba(16, 185, 129, 0.22);
  --brand-border-hover: rgba(16, 185, 129, 0.48);
  --brand-soft-hover:   rgba(16, 185, 129, 0.16);
  --font-display:       'Playfair Display', Georgia, serif;
  --font-body:          'Plus Jakarta Sans', 'Geist', -apple-system, sans-serif;
  --dot-grid-color:     rgba(16, 185, 129, 0.14);
  --dot-grid-size:      28px;
}

[data-theme="dark"] {
  --ink-mute:  #999999;
  --ink-ghost: #8A8A8A;
}
[data-theme="light"] {
  --dot-grid-color: rgba(16, 185, 129, 0.18);
}

/* ── Dot grid (full document, scrolls with page) ──────────────────── */
body {
  background-color: var(--surface);
  background-image: radial-gradient(
    circle,
    var(--dot-grid-color) 1px,
    transparent 1px
  );
  background-size: var(--dot-grid-size) var(--dot-grid-size);
  background-position: 0 0;
}

/* ── Hero overrides ────────────────────────────────────────────────── */

/* ── Staircase table ─────────────────────────────────────────────── */
.staircase {
  border: 1px solid var(--border);
  border-radius: 0.75rem;
  overflow: hidden;
  margin: 2rem 0;
}
.staircase-row {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 0;
  padding: 0.875rem 1.25rem;
  border-bottom: 1px solid var(--border);
  background: var(--surface-1);
  transition: background 0.2s;
  align-items: center;
}
.staircase-row:last-child { border-bottom: none; }
.staircase-row:hover { background: var(--surface-2); }
.staircase-row.header {
  background: var(--surface-2);
  cursor: default;
}
.staircase-row.header:hover { background: var(--surface-2); }
.staircase-row.active {
  background: var(--brand-soft);
  transition: background 0.35s ease;
}
.staircase-row.active:hover {
  background: var(--brand-soft);
}
.staircase-row.floor {
  background: var(--surface-1);
}
.stair-col {
  font-size: 0.875rem;
  color: var(--ink-mute);
}
.stair-col-head {
  font-family: var(--font-mono);
  font-size: 0.625rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-ghost);
}
.stair-name {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--ink);
}
.stair-name.active { color: var(--brand); transition: color 0.35s ease; }
.stair-badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.5625rem;
  letter-spacing: 0.06em;
  padding: 0.15rem 0.5rem;
  border-radius: 999px;
  background: var(--brand-soft);
  color: var(--brand);
  border: 1px solid var(--brand-border);
  margin-left: 0.5rem;
  vertical-align: middle;
  transition: background 0.35s ease, color 0.35s ease, border-color 0.35s ease;
}
.stair-ellipsis {
  text-align: center;
  padding: 0.5rem;
  color: var(--ink-ghost);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  background: var(--surface-1);
  border-bottom: 1px solid var(--border);
}

/* ── Comparison (bhann-specific strike modifier) ─────────────────── */
.compare-cell.strike { text-decoration: line-through; opacity: 0.5; }

/* ── Responsive ──────────────────────────────────────────────────── */
@media (max-width: 768px) {
  nav { padding: 1rem 1.25rem; }
  .nav-links { display: none; }
  .wrap, .wrap-wide { padding: 0 1.25rem; }
  .metrics-grid { grid-template-columns: repeat(2, 1fr); }
  .staircase-row { grid-template-columns: 1.5fr 1fr 1fr; }
  .staircase-row .stair-col:last-child { display: none; }
  .compare-grid { grid-template-columns: 1fr 1fr; }
  .compare-cell.head:first-child,
  .compare-cell.feature { grid-column: 1 / -1; border-bottom: 1px solid var(--border); }
  .stack-grid { grid-template-columns: 1fr; }
  .exec-summary { grid-template-columns: 1fr; }
}