/* --- Card Nav (shared) --- */
.site-header {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  z-index: 30;
  pointer-events: none;
}

.card-nav-container {
  position: relative;
  width: min(100% - 2rem, 60rem);
  margin: 1.25rem auto 0;
  height: 60px;
  pointer-events: auto;
}

.card-nav {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  display: block;
  height: 60px;
  overflow: hidden;
  background: color-mix(in srgb, var(--bg-base) 88%, transparent);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--border-default);
  border-radius: 18px;
  box-shadow: var(--shadow-md);
  transition: height 360ms cubic-bezier(0.22, 0.61, 0.36, 1);
  will-change: height;
}

.card-nav.is-open {
  height: 280px;
}

.card-nav-top {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0 0.55rem 0 1rem;
  z-index: 2;
}

.card-nav-hamburger {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 0;
  border-radius: 12px;
  background: transparent;
  color: var(--text-primary);
  cursor: pointer;
  transition: background-color 180ms ease;
}

.card-nav-hamburger:hover,
.card-nav-hamburger:focus-visible {
  background: rgba(255, 255, 255, 0.04);
}

.hamburger-line {
  display: block;
  width: 22px;
  height: 1.5px;
  background: currentColor;
  transition: transform 240ms ease, opacity 200ms ease;
  transform-origin: 50% 50%;
}

.card-nav-hamburger[aria-expanded="true"] .hamburger-line:first-child {
  transform: translateY(3.75px) rotate(45deg);
}

.card-nav-hamburger[aria-expanded="true"] .hamburger-line:last-child {
  transform: translateY(-3.75px) rotate(-45deg);
}

.card-nav-logo {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  min-height: 0;
  padding: 0;
}

.card-nav-top .status-pill {
  flex-shrink: 0;
}

.card-nav-content {
  position: absolute;
  left: 0;
  right: 0;
  top: 60px;
  bottom: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  padding: 10px;
  visibility: hidden;
  pointer-events: none;
  z-index: 1;
}

.card-nav.is-open .card-nav-content {
  visibility: visible;
  pointer-events: auto;
}

.nav-card {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  padding: 14px 16px;
  border-radius: 12px;
  background: var(--nav-card-bg, var(--bg-surface));
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 360ms cubic-bezier(0.22, 0.61, 0.36, 1), transform 360ms cubic-bezier(0.22, 0.61, 0.36, 1);
  transition-delay: 0ms;
}

.card-nav.is-open .nav-card {
  opacity: 1;
  transform: translateY(0);
}

.card-nav.is-open .nav-card:nth-child(1) { transition-delay: 80ms; }
.card-nav.is-open .nav-card:nth-child(2) { transition-delay: 140ms; }
.card-nav.is-open .nav-card:nth-child(3) { transition-delay: 200ms; }

.nav-card-label {
  display: inline-block;
  color: var(--text-primary);
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  transition: color 180ms ease;
  text-decoration: none;
}

.nav-card-label:hover,
.nav-card-label:focus-visible {
  color: var(--accent-primary);
}

.nav-card-links {
  margin-top: auto;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.nav-card-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.15rem 0;
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.02em;
  text-decoration: none;
  transition: color 180ms ease, transform 180ms ease;
}

.nav-card-link:hover,
.nav-card-link:focus-visible {
  color: var(--accent-primary);
  transform: translateX(2px);
}

.nav-card-link-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 14px;
  height: 14px;
  color: var(--text-muted);
  font-size: 0.85em;
}

.brand-mono {
  display: inline-flex;
  align-items: baseline;
  min-height: 44px;
  padding: 0.5rem 0;
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 0.92rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  text-decoration: none;
  transition: color 180ms ease;
}

.brand-mono:hover,
.brand-mono:focus-visible {
  color: var(--text-primary);
}

.brand-mono:hover .brand-mono-accent,
.brand-mono:focus-visible .brand-mono-accent {
  color: var(--accent-hover);
}

.brand-mono-accent {
  color: var(--accent-primary);
}

.brand-mono-caret {
  display: inline-block;
  margin-left: 0.06em;
  color: var(--accent-primary);
  animation: brandCaret 1.05s steps(1, end) infinite;
}

@keyframes brandCaret {
  0%, 50% { opacity: 1; }
  50.01%, 100% { opacity: 0; }
}

.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  min-height: 30px;
  padding: 0.3rem 0.7rem;
  border-radius: var(--radius-pill);
  border: 1px solid var(--border-default);
  background: rgba(255, 255, 255, 0.02);
  color: var(--text-secondary);
  font-family: var(--font-display);
  font-size: 0.62rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  white-space: nowrap;
}

.status-dot {
  width: 0.4rem;
  height: 0.4rem;
  border-radius: 50%;
  background: var(--accent-primary);
  box-shadow: 0 0 0 0 rgba(224, 122, 95, 0.55);
  animation: cardNavPulse 2.4s ease-in-out infinite;
}

@keyframes cardNavPulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(224, 122, 95, 0.5); opacity: 0.95; }
  50% { box-shadow: 0 0 0 7px rgba(224, 122, 95, 0); opacity: 0.55; }
}

@media (max-width: 768px) {
  .card-nav-container { width: min(100% - 1.5rem, 60rem); margin-top: 1rem; }
  .card-nav-top .status-pill { display: none; }
  .card-nav-logo { left: auto; right: 0.85rem; transform: translateY(-50%); }
  .card-nav { transition: none; }
  .card-nav.is-open {
    height: auto;
    max-height: calc(100vh - 2rem);
    overflow-y: auto;
  }
  .card-nav-content {
    position: static;
    grid-template-columns: 1fr;
    gap: 8px;
    padding: 8px 10px 12px;
  }
  .nav-card { min-height: 0; padding: 14px 16px; }
  .nav-card-label { font-size: 1.1rem; }
  .nav-card-links { margin-top: 0.4rem; }
  .card-nav.is-open .nav-card { transition-delay: 0ms; }
}

@media (prefers-reduced-motion: reduce) {
  .card-nav,
  .nav-card,
  .nav-card-link,
  .hamburger-line { transition: none !important; }
  .brand-mono-caret { animation: none; opacity: 1; }
}