/* =============================================
   Layout — Sidebar, Main Content, Mobile Tab Bar
   ============================================= */

/* App Container */
.app-container {
  display: flex;
  height: 100vh;
  height: 100dvh; /* Dynamic viewport for mobile */
  width: 100vw;
  overflow: hidden;
}

/* ─── Sidebar (Desktop) ─── */
.sidebar {
  width: var(--sidebar-width);
  height: 100%;
  background: var(--surface);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-right: 1px solid var(--glass-border);
  display: flex;
  flex-direction: column;
  z-index: 100;
  flex-shrink: 0;
}

.sidebar-header {
  height: var(--header-height);
  display: flex;
  align-items: center;
  padding: 0 var(--spacing-lg);
  border-bottom: 1px solid var(--glass-border);
  flex-shrink: 0;
}

.sidebar-logo {
  font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Inter', sans-serif;
  font-size: 22px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--text-primary);
}

.sidebar-logo img {
  height: 64px;
  width: auto;
}

/* ─── Generic two-half logo row: main logo + active "akce" logo, with a
   centered divider between them. Reused by both the sidebar header and the
   login screen so an admin-picked akce shows up identically in both. ─── */
.dual-logo-row {
  display: flex;
  align-items: center;
  width: 100%;
}

.dual-logo-half {
  flex: 1;
  min-width: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.dual-logo-divider {
  width: 1px;
  align-self: stretch;
  background: var(--glass-border);
  flex-shrink: 0;
}

/* No active akce: collapse the second half so the main logo centers across the full row */
.dual-logo-row:not(.has-akce) .dual-logo-half:last-child {
  display: none;
}

.sidebar-nav {
  flex: 1;
  padding: var(--spacing-md) var(--spacing-sm);
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: 10px var(--spacing-md);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  font-size: 14px;
  letter-spacing: -0.01em;
  transition: all var(--transition-fast);
  position: relative;
  min-height: 44px;
  -webkit-tap-highlight-color: transparent;
}

.nav-item .material-icons-outlined {
  font-size: 22px;
  transition: color var(--transition-fast);
}

.nav-item:hover {
  background: var(--glass-white-hover);
  color: var(--text-primary);
}

.nav-item.active {
  background: rgba(var(--primary-rgb), 0.1);
  color: var(--primary-light);
}

.nav-item.active .material-icons-outlined {
  color: var(--primary-light);
}

.nav-item.active::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  height: 20px;
  width: 3px;
  background: var(--primary);
  border-radius: 0 3px 3px 0;
}

.sidebar-footer {
  padding: var(--spacing-md);
  border-top: 1px solid var(--glass-border);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  flex-shrink: 0;
}

/* ─── Mobile Bottom Tab Bar ─── */
.mobile-tab-bar {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: var(--mobile-tab-height);
  background: rgba(28, 28, 30, 0.85);
  backdrop-filter: blur(40px) saturate(180%);
  -webkit-backdrop-filter: blur(40px) saturate(180%);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  z-index: 1000;
  padding-bottom: env(safe-area-inset-bottom, 0px);
}

.mobile-tab-bar nav {
  display: flex;
  align-items: center;
  justify-content: space-around;
  height: var(--mobile-tab-height);
  padding: 0 var(--spacing-xs);
}

.tab-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  padding: 4px 0;
  color: var(--text-tertiary);
  text-decoration: none;
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.01em;
  transition: color var(--transition-fast);
  min-width: 44px;
  min-height: 44px;
  -webkit-tap-highlight-color: transparent;
  position: relative;
}

.tab-item .material-icons-outlined {
  font-size: 24px;
  transition: color var(--transition-fast);
}

.tab-item.active {
  color: var(--primary);
}

.tab-item.active .material-icons-outlined {
  color: var(--primary);
}

.tab-item .tab-badge {
  position: absolute;
  top: 2px;
  right: 6px;
  min-width: 16px;
  height: 16px;
  padding: 0 4px;
  border-radius: 8px;
  background: var(--primary);
  color: white;
  font-size: 10px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
}

/* ─── Main Content Area ─── */
.main-content {
  flex: 1;
  height: 100%;
  overflow-y: auto;
  overflow-x: hidden;
  position: relative;
  background: radial-gradient(ellipse at top right, rgba(var(--primary-rgb), 0.03), transparent 50%),
              radial-gradient(ellipse at bottom left, rgba(var(--accent-rgb), 0.03), transparent 50%);
}

.page-header {
  padding: var(--spacing-xl) var(--spacing-xl) var(--spacing-lg);
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: var(--spacing-md);
}

.page-header h1 {
  margin-bottom: 2px;
}

.header-actions {
  display: flex;
  gap: var(--spacing-sm);
  align-items: center;
}

.header-actions .search-input {
  width: 250px;
}

.header-actions .status-select {
  width: 180px;
}

.page-body {
  padding: 0 var(--spacing-xl) var(--spacing-xxl);
  max-width: var(--content-max-width);
  margin: 0 auto;
}

/* ─── Grids ─── */
.grid-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-xl);
}

.grid-videos {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(420px, 1fr));
  gap: var(--spacing-lg);
}

/* ─── Mobile Menu Toggle ─── */
.mobile-menu-toggle {
  display: none;
}

/* =============================================
   Responsive — Mobile (≤768px)
   ============================================= */
@media (max-width: 768px) {
  /* Hide desktop sidebar on mobile */
  .sidebar {
    display: none;
  }

  /* Show bottom tab bar */
  .mobile-tab-bar {
    display: block;
  }

  /* Main content full width, with bottom padding for tab bar */
  .main-content {
    width: 100%;
    padding-bottom: calc(var(--mobile-tab-height) + env(safe-area-inset-bottom, 0px) + 8px);
  }

  /* Page header stacks vertically */
  .page-header {
    flex-direction: column;
    align-items: flex-start;
    padding: var(--spacing-lg) var(--spacing-md) var(--spacing-md);
    gap: var(--spacing-sm);
  }

  .page-header > div:last-child {
    width: 100%;
  }

  .header-actions {
    width: 100%;
    flex-direction: column;
    align-items: stretch;
    gap: var(--spacing-sm);
  }

  .header-actions .search-input,
  .header-actions .status-select {
    width: 100% !important;
  }

  /* Page body mobile padding */
  .page-body {
    padding: 0 var(--spacing-md) calc(var(--spacing-xl) + var(--mobile-tab-height));
  }

  /* Stats grid — single column on small screens */
  .grid-stats {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }

  /* Video grid — single column on narrow screens */
  .grid-videos {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }

  /* Toast container above tab bar */
  #toastContainer {
    bottom: calc(var(--mobile-tab-height) + env(safe-area-inset-bottom, 0px) + 16px) !important;
    right: var(--spacing-md) !important;
    left: var(--spacing-md) !important;
  }
}

/* ─── Tablet (≤1024px) ─── */
@media (max-width: 1024px) and (min-width: 769px) {
  .sidebar {
    width: 220px;
  }

  .page-body {
    padding: 0 var(--spacing-lg) var(--spacing-xl);
  }

  .grid-videos {
    grid-template-columns: repeat(auto-fill, minmax(390px, 1fr));
  }
}

/* ─── Large Desktop ─── */
@media (min-width: 1600px) {
  .page-body {
    max-width: 1600px;
  }
}