/* ============================================================ LAYOUT PRIMITIVES */
.container { max-width: 1120px; margin: 0 auto; padding: 0 24px; }
.visually-hidden {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}
.skip-link {
  position: absolute; top: 8px; left: 8px; z-index: 100;
  padding: 8px 12px; background: var(--accent); color: #fff;
  border-radius: var(--radius-sm); font-weight: 500;
  transform: translateY(-150%); transition: transform var(--t-med) var(--ease-out);
}
.skip-link:focus { transform: translateY(0); color: #fff; }

/* ============================================================ NAV */
header.nav {
  position: sticky; top: 0; z-index: 50;
  height: 56px;
  background: color-mix(in oklab, var(--bg) 80%, transparent);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--border);
}
.nav-inner { height: 100%; display: flex; align-items: center; gap: 16px; }
.brand {
  display: inline-flex; align-items: center; gap: 8px;
  font-weight: 600; font-size: var(--fs-md); color: var(--text); letter-spacing: -0.01em;
}
.brand:hover { text-decoration: none; color: var(--text); }
.brand-cubes { display: inline-flex; align-items: center; gap: 6px; }
.brand-cube {
  width: 36px; height: 36px; border-radius: 9px;
  background: var(--accent); color: #fff;
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 18px; font-weight: 700; letter-spacing: -0.02em;
}
.nav-spacer { flex: 1; }
.nav-actions { display: flex; align-items: center; gap: 6px; }
.user-chip {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 4px 10px; height: 28px;
  font-size: var(--fs-sm); color: var(--text-muted);
  border: 1px solid var(--border); border-radius: 999px;
  background: var(--bg-elevated);
}
.user-chip-dot { width: 6px; height: 6px; border-radius: 50%; background: var(--success); }

/* Theme toggle icon swap */
.theme-toggle svg { width: 18px; height: 18px; }
.theme-toggle .icon-sun { display: none; }
.theme-toggle .icon-moon { display: block; }
[data-theme="dark"] .theme-toggle .icon-sun { display: block; }
[data-theme="dark"] .theme-toggle .icon-moon { display: none; }

/* ============================================================ HERO */
.hero { padding: 80px 0 56px; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 4px 10px; border-radius: 999px;
  background: var(--accent-bg); color: var(--accent);
  font-size: var(--fs-xs); font-weight: 500;
  letter-spacing: 0.04em; text-transform: uppercase;
  margin-bottom: 20px;
}
.eyebrow-dot { width: 6px; height: 6px; border-radius: 50%; background: var(--accent); }
.hero h1 {
  font-size: var(--fs-2xl); line-height: 52px; font-weight: 700;
  letter-spacing: -0.025em; color: var(--text);
  max-width: 18ch; margin-bottom: 16px;
}
.hero .sub {
  font-size: var(--fs-md); line-height: 26px; color: var(--text-muted);
  max-width: 56ch; margin-bottom: 32px;
}
.hero .sub b { color: var(--text); font-weight: 600; }
.code-block {
  position: relative; max-width: 640px;
  background: var(--bg-subtle); border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 16px 16px 18px;
}
.code-block pre {
  font-size: 13px; line-height: 22px;
  color: var(--text);
  white-space: pre; overflow-x: auto;
  font-variant-ligatures: none;
}
.code-block .comment { color: var(--text-muted); }
.code-block .cmd { color: var(--accent); }
.code-block .copy-btn {
  position: absolute; top: 8px; right: 8px;
  width: 28px; height: 28px;
  display: inline-flex; align-items: center; justify-content: center;
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  background: transparent;
  transition: background var(--t-fast), color var(--t-fast);
}
.code-block .copy-btn:hover { background: var(--border); color: var(--text); }
.code-block .copy-btn svg { width: 14px; height: 14px; }

/* ============================================================ FOOTER */
footer.site {
  margin-top: 16px; padding: 24px 0 40px;
  border-top: 1px solid var(--border);
  display: flex; justify-content: space-between; align-items: center;
  gap: 16px; flex-wrap: wrap;
  font-size: var(--fs-xs); color: var(--text-muted);
}
footer.site a { color: var(--text-muted); }
footer.site a:hover { color: var(--text); }