/* ==========================================================================
   COMPONENT: NAVIGATION BAR & FULLSCREEN DRAWER
   ========================================================================== */

.site-nav {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  background-color: rgba(26, 25, 23, 0.88);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border-subtle);
  z-index: var(--z-nav);
  display: flex;
  align-items: center;
  transition: border-color var(--duration-fast) var(--ease-precise), background-color var(--duration-fast) var(--ease-precise);
}

.site-nav .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand-link {
  display: inline-flex;
  align-items: center;
  gap: 1rem;
  cursor: pointer;
}

.brand-logo-mark {
  width: 38px;
  height: 38px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform var(--duration-normal) var(--ease-precise);
}

.brand-link:hover .brand-logo-mark {
  transform: rotate(90deg);
}

.brand-name-group {
  display: flex;
  flex-direction: column;
}

.brand-title {
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  line-height: 1.1;
}

.brand-subtitle {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.nav-center-meta {
  display: none;
}

@media (min-width: 900px) {
  .nav-center-meta {
    display: flex;
    align-items: center;
    gap: 2rem;
  }
}

.nav-status-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-secondary);
  padding: 0.35rem 0.75rem;
  border: 1px solid var(--border-subtle);
  border-radius: 2px;
  background-color: var(--surface-subtle);
}

.status-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--accent-primary);
  opacity: 0.85;
  box-shadow: 0 0 8px rgba(216, 210, 197, 0.4);
  animation: pulseDot 2.8s infinite ease-in-out;
}

@keyframes pulseDot {
  0%, 100% { opacity: 0.4; transform: scale(0.9); }
  50% { opacity: 1; transform: scale(1.15); }
}

.nav-time-pill {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-muted);
  letter-spacing: 0.08em;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

.btn-menu-trigger {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.55rem 1.25rem;
  border: 1px solid var(--border-medium);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent-primary);
  background-color: var(--surface-base);
  transition: all var(--duration-fast) var(--ease-precise);
}

.btn-menu-trigger:hover {
  background-color: var(--accent-primary);
  color: var(--bg-primary);
  border-color: var(--accent-primary);
}

.btn-menu-trigger .menu-icon-lines {
  display: flex;
  flex-direction: column;
  gap: 4px;
  width: 16px;
}

.btn-menu-trigger .menu-icon-lines span {
  display: block;
  width: 100%;
  height: 1.5px;
  background-color: currentColor;
  transition: transform var(--duration-fast) var(--ease-precise);
}

/* --- Fullscreen Navigation Overlay --- */
.nav-overlay {
  position: fixed;
  inset: 0;
  background-color: #161514;
  z-index: var(--z-menu);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: var(--gutter-desktop);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity var(--duration-normal) var(--ease-precise), visibility var(--duration-normal) var(--ease-precise);
}

.nav-overlay.is-active {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

.nav-overlay-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border-subtle);
}

.btn-menu-close {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  border: 1px solid var(--border-medium);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-primary);
  transition: all var(--duration-fast) var(--ease-precise);
}

.btn-menu-close:hover {
  background-color: var(--accent-primary);
  color: var(--bg-primary);
}

.nav-overlay-body {
  margin-block: auto;
  max-width: var(--max-width);
  width: 100%;
}

.nav-overlay-list {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.nav-overlay-item {
  border-bottom: 1px solid var(--border-subtle);
  padding-bottom: 1.25rem;
}

.nav-overlay-link {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  font-family: var(--font-sans);
  font-size: clamp(2rem, 4.5vw, 4rem);
  font-weight: 700;
  letter-spacing: -0.035em;
  color: var(--text-secondary);
  transition: color var(--duration-fast) var(--ease-precise), transform var(--duration-fast) var(--ease-precise);
}

.nav-overlay-link .link-index {
  font-family: var(--font-mono);
  font-size: clamp(0.9rem, 1.4vw, 1.4rem);
  letter-spacing: 0.14em;
  font-weight: 400;
  color: var(--text-muted);
  margin-right: 1.5rem;
}

.nav-overlay-link .link-arrow {
  font-family: var(--font-mono);
  font-size: clamp(1.2rem, 2vw, 2.2rem);
  opacity: 0;
  transform: translateX(-16px);
  transition: opacity var(--duration-fast) var(--ease-precise), transform var(--duration-fast) var(--ease-precise);
}

.nav-overlay-link:hover {
  color: var(--accent-primary);
  transform: translateX(12px);
}

.nav-overlay-link:hover .link-arrow {
  opacity: 1;
  transform: translateX(0);
}

.nav-overlay-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-subtle);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: var(--text-muted);
}