/* ============================================================
   Header / nav
   ============================================================ */

.site-header {
  position: sticky;
  top: 0;
  background: color-mix(in oklab, var(--bone) 78%, transparent);
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  border-bottom: 1px solid var(--rule);
  z-index: 50;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 0;
  gap: 1rem;
}

.brand {
  font-family: var(--font-display);
  font-weight: 600;
  font-style: italic;
  font-size: 1.25rem;
  letter-spacing: -0.03em;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--ink);
  font-variation-settings: "opsz" 144, "SOFT" 100, "WONK" 1;
}

.brand::before {
  content: "";
  width: 8px;
  height: 8px;
  background: var(--signal);
  border-radius: 50%;
  box-shadow: 0 0 0 2px var(--bone), 0 1px 4px rgba(255, 77, 31, 0.2);
  animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.4); }
}

.nav-links {
  display: flex;
  gap: 0.15rem;
  font-family: var(--font-mono);
  font-size: 0.88rem;
  text-transform: none;
  letter-spacing: 0.02em;
  font-weight: 500;
}

.nav-links a {
  color: var(--muted);
  padding: 0.55rem 0.9rem;
  border-radius: var(--radius-sm);
  position: relative;
  transition: color 0.2s var(--ease-out);
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

.nav-links a:hover {
  color: var(--ink);
}

.nav-links a::after {
  content: "";
  position: absolute;
  left: 0.75rem;
  right: 0.75rem;
  bottom: 0.35rem;
  height: 1px;
  background: var(--signal);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.45s var(--ease-out);
}

.nav-links a:hover::after,
.nav-links a.active::after {
  transform: scaleX(1);
}

.nav-links a.active {
  color: var(--ink);
}