/* ═══════════════════════════════════════════════════════════════
   UJIYARI — Navigation
═══════════════════════════════════════════════════════════════ */

/* ── Site Header ───────────────────────────────────────────── */
.site-header {
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  box-shadow: 0 1px 0 var(--color-border), 0 4px 16px rgba(0,0,0,0.04);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
  gap: var(--space-6);
}

/* ── Logo ──────────────────────────────────────────────────── */
.site-logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  text-decoration: none;
  flex-shrink: 0;
}

.site-logo img {
  height: 36px;
  width: auto;
}

.site-logo__text {
  font-family: 'Cinzel', Georgia, serif;
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-brand);
  line-height: 1;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.site-logo__tagline {
  font-size: 10px;
  color: var(--color-text-muted);
  font-weight: var(--font-medium);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  white-space: nowrap;
}

/* ── Primary Nav ───────────────────────────────────────────── */
.primary-nav {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.primary-nav__link {
  position: relative;
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--color-text-secondary);
  transition: all var(--transition-fast);
  white-space: nowrap;
  text-decoration: none;
}

.primary-nav__link svg {
  width: 15px;
  height: 15px;
  flex-shrink: 0;
  opacity: 0.7;
}

.primary-nav__link:hover {
  background: var(--color-surface-alt);
  color: var(--color-brand);
}

.primary-nav__link:hover svg { opacity: 1; }

.primary-nav__link.active {
  color: var(--color-brand);
  background: #e8f0fb;
  font-weight: var(--font-semibold);
}

.primary-nav__link.active svg { opacity: 1; }

/* Animated underline on active */
.primary-nav__link.active::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 50%;
  transform: translateX(-50%);
  width: 20px;
  height: 2px;
  background: var(--color-brand);
  border-radius: var(--radius-full);
}

/* ── Header Actions ────────────────────────────────────────── */
.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.search-trigger {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-full);
  border: 1.5px solid var(--color-border);
  background: var(--color-surface-alt);
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
}

.search-trigger:hover {
  border-color: var(--color-brand-light);
  color: var(--color-brand);
  background: var(--color-white);
  box-shadow: var(--shadow-sm);
}

.search-trigger svg { width: 15px; height: 15px; }

.search-trigger__hint {
  font-size: 11px;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  padding: 1px 5px;
  color: var(--color-text-muted);
}

/* ── Mobile Toggle ─────────────────────────────────────────── */
.mobile-menu-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  color: var(--color-text-secondary);
  transition: all var(--transition-fast);
}

.mobile-menu-toggle:hover { background: var(--color-surface-alt); color: var(--color-brand); }
.mobile-menu-toggle svg { width: 20px; height: 20px; }

/* ── Mobile Nav ────────────────────────────────────────────── */
.mobile-nav {
  display: none;
  flex-direction: column;
  background: var(--color-white);
  border-top: 1px solid var(--color-border);
  padding: var(--space-3) var(--space-4);
  gap: var(--space-1);
  max-height: calc(100vh - var(--header-height));
  max-height: calc(100dvh - var(--header-height));
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}

.mobile-nav.is-open { display: flex; }

.mobile-nav__link {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-base);
  font-weight: var(--font-medium);
  color: var(--color-text-secondary);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  text-decoration: none;
}

.mobile-nav__link svg { width: 18px; height: 18px; opacity: 0.7; }

.mobile-nav__link:hover,
.mobile-nav__link.active {
  background: var(--color-surface-alt);
  color: var(--color-brand);
}

/* ── Breadcrumb ────────────────────────────────────────────── */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  color: rgba(255,255,255,0.55);
  margin-bottom: var(--space-4);
  flex-wrap: wrap;
}

.breadcrumb a {
  color: rgba(255,255,255,0.75);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.breadcrumb a:hover { color: var(--color-white); }
.breadcrumb__sep { opacity: 0.4; }

/* ── Tab Navigation (Daily: Notes | Audio | PDF) ───────────── */
.tab-nav {
  display: flex;
  gap: 0;
  border-bottom: 2px solid var(--color-border);
  margin-bottom: var(--space-8);
  overflow-x: auto;
  scrollbar-width: none;
}

.tab-nav::-webkit-scrollbar { display: none; }

.tab-nav__item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  color: var(--color-text-muted);
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  cursor: pointer;
  white-space: nowrap;
  transition: all var(--transition-fast);
  border-radius: var(--radius-md) var(--radius-md) 0 0;
}

.tab-nav__item svg { width: 16px; height: 16px; }
.tab-nav__item:hover { color: var(--color-brand); background: var(--color-surface-alt); }

.tab-nav__item.active {
  color: var(--color-brand);
  border-bottom-color: var(--color-brand);
  background: rgba(37,99,168,0.06);
}

.tab-panel { display: none; }
.tab-panel.active { display: block; animation: fadeIn 0.2s ease; }

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ── Dropdown menu ─────────────────────────────────────────── */
.nav-dropdown {
  position: relative;
}

/* Invisible bridge fills the 8px gap between trigger and menu so the
   hover chain is never broken when moving the mouse downward.
   Always present so the hover area is continuous. */
.nav-dropdown::after {
  content: '';
  position: absolute;
  top: 100%;
  left: -16px;
  right: -16px;
  height: 14px;     /* covers the 8px gap + a little margin */
}

.nav-dropdown__trigger {
  cursor: pointer;
}

.nav-dropdown__menu {
  position: absolute;
  top: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%) translateY(-4px);
  min-width: 240px;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  padding: var(--space-2);
  opacity: 0;
  pointer-events: none;
  transition: all var(--transition-normal);
  z-index: var(--z-dropdown);
}

/* Triangle pointer */
.nav-dropdown__menu::before {
  content: '';
  position: absolute;
  top: -6px;
  left: 50%;
  transform: translateX(-50%);
  width: 12px;
  height: 12px;
  background: var(--color-white);
  border-left: 1px solid var(--color-border);
  border-top: 1px solid var(--color-border);
  transform: translateX(-50%) rotate(45deg);
}

.nav-dropdown:hover .nav-dropdown__menu,
.nav-dropdown:focus-within .nav-dropdown__menu {
  opacity: 1;
  pointer-events: all;
  transform: translateX(-50%) translateY(0);
}

.nav-dropdown__item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-lg);
  text-decoration: none;
  color: var(--color-text-secondary);
  transition: all var(--transition-fast);
}

.nav-dropdown__item:hover {
  background: var(--color-surface-alt);
  color: var(--color-brand);
}

.nav-dropdown__item svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  opacity: 0.6;
}

.nav-dropdown__label {
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  color: var(--color-text-primary);
}

.nav-dropdown__desc {
  font-size: 11px;
  color: var(--color-text-muted);
  margin-top: 1px;
}