/* View Navigation */
.tab-nav {
  display: flex;
  gap: var(--spacing-xs);
  padding: 0 var(--spacing-lg);
  background: var(--color-bg-panel);
  border-bottom: 1px solid var(--color-border);
  flex-shrink: 0;
  height: var(--nav-height);
}

.tab-btn {
  padding: 0 var(--spacing-lg);
  background: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  color: var(--color-text-muted);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s ease;
  white-space: nowrap;
  letter-spacing: 0.02em;
}

.tab-btn:hover {
  color: var(--color-text);
}

.tab-btn.tab-active {
  color: var(--color-primary-hover);
  border-bottom-color: var(--color-primary);
}

/* View Content Areas */
.tab-container {
  flex: 1;
  overflow: hidden;
  position: relative;
}

.view-content {
  display: flex;
  flex-direction: column;
  height: 100%;
  overflow: hidden;
}

.view-content[hidden] {
  display: none;
}

/* Global Search */
.global-search-wrap {
  position: relative;
  flex: 0 1 360px;
}

.global-search-input {
  width: 100%;
  padding: var(--spacing-xs) var(--spacing-md);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 20px;
  color: var(--color-text);
  font-size: 0.8125rem;
  outline: none;
  transition: border-color 0.15s ease;
}

.global-search-input:focus {
  border-color: var(--color-primary);
}

.global-search-input::placeholder {
  color: var(--color-text-muted);
}

.search-dropdown {
  position: absolute;
  top: calc(100% + 4px);
  left: 0;
  right: 0;
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  box-shadow: 0 12px 32px rgba(0,0,0,0.5);
  max-height: 60vh;
  overflow-y: auto;
  z-index: 1000;
}

.search-group {
  padding: var(--spacing-xs) 0;
  border-bottom: 1px solid var(--color-border);
}
.search-group:last-child { border-bottom: none; }

.search-group-label {
  padding: var(--spacing-xs) var(--spacing-md);
  font-size: 0.65rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-muted);
}

.search-result {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-xs) var(--spacing-md);
  cursor: pointer;
  transition: background 0.1s;
}
.search-result:hover { background: var(--color-bg-hover); }

.search-result-icon {
  font-size: 0.875rem;
  width: 16px;
  text-align: center;
  flex-shrink: 0;
}
.search-result-name {
  flex: 1;
  font-size: 0.8125rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.search-result-type {
  font-size: 0.65rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  flex-shrink: 0;
}
.search-empty {
  padding: var(--spacing-md);
  text-align: center;
  color: var(--color-text-muted);
  font-size: 0.8125rem;
}

/* Gear Menu */
.gear-menu-wrap { position: relative; }
.btn-icon-gear {
  min-width: 36px;
  font-weight: 800;
  letter-spacing: 2px;
}
.gear-dropdown {
  position: absolute;
  top: calc(100% + 4px);
  right: 0;
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  box-shadow: 0 8px 24px rgba(0,0,0,0.4);
  min-width: 180px;
  z-index: 999;
  padding: var(--spacing-xs) 0;
}
.gear-item {
  display: block;
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  background: none;
  border: none;
  color: var(--color-text);
  font-size: 0.8125rem;
  text-align: left;
  cursor: pointer;
}
.gear-item:hover { background: var(--color-bg-hover); }
.gear-divider {
  height: 1px;
  background: var(--color-border);
  margin: var(--spacing-xs) 0;
}

/* Shared Badges */
.badge {
  display: inline-block;
  padding: 1px 6px;
  border-radius: 3px;
  font-size: 0.65rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.02em;
}
.badge-pass { background: rgba(16, 185, 129, 0.2); color: #34d399; }
.badge-fail { background: rgba(239, 68, 68, 0.2); color: #f87171; }
.badge-partial { background: rgba(245, 158, 11, 0.2); color: #fbbf24; }
.badge-pending { background: rgba(148, 163, 184, 0.2); color: #94a3b8; }
.badge-mixed { background: rgba(99, 102, 241, 0.2); color: #818cf8; }
.badge-system { background: var(--color-bg-hover); color: var(--color-text-muted); font-size: 0.6rem; padding: 1px 5px; }
.badge-arc-D { background: rgba(139, 92, 246, 0.2); color: #a78bfa; }
.badge-arc-R { background: rgba(59, 130, 246, 0.2); color: #60a5fa; }
.badge-arc-E { background: rgba(16, 185, 129, 0.2); color: #34d399; }

/* Shared Components */
.section-title {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-sm);
}

.tag {
  display: inline-block;
  font-size: 0.7rem;
  background: var(--color-bg);
  color: var(--color-text-muted);
  padding: 2px 6px;
  border-radius: 3px;
  margin-right: 4px;
  margin-bottom: 4px;
}

.count { font-size: 0.65rem; color: var(--color-text-muted); font-weight: 400; }

/* Shared Coordinate Bars */
.coord-bars { margin-bottom: var(--spacing-sm); }
.coord-row {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  margin-bottom: 3px;
}
.coord-label {
  font-size: 0.65rem;
  color: var(--color-text-muted);
  width: 70px;
  text-align: right;
  flex-shrink: 0;
}
.coord-track {
  flex: 1;
  height: 6px;
  background: var(--color-bg);
  border-radius: 3px;
  position: relative;
  overflow: visible;
}
.coord-fill {
  height: 100%;
  border-radius: 3px;
  background: var(--color-primary);
  opacity: 0.4;
}
.coord-marker {
  position: absolute;
  top: -2px;
  width: 3px;
  height: 10px;
  background: var(--color-primary-hover);
  border-radius: 1px;
  transform: translateX(-50%);
}
.coord-value {
  font-size: 0.65rem;
  font-family: monospace;
  color: var(--color-text-muted);
  width: 30px;
  flex-shrink: 0;
}

/* Loading / Empty states */
.loading {
  text-align: center;
  padding: var(--spacing-xl);
  color: var(--color-text-muted);
  font-style: italic;
}
.empty-state {
  text-align: center;
  padding: var(--spacing-xl);
  color: var(--color-text-muted);
}

/* Clickable nav link */
.nav-link {
  color: var(--color-primary-hover);
  cursor: pointer;
  text-decoration: none;
}
.nav-link:hover { text-decoration: underline; }

/* Back button */
.back-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  background: none;
  border: none;
  color: var(--color-text-muted);
  font-size: 0.8125rem;
  cursor: pointer;
  padding: var(--spacing-sm) 0;
  margin-bottom: var(--spacing-sm);
}
.back-btn:hover { color: var(--color-text); }

/* Filter bar */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-lg);
  background: var(--color-surface-2);
  border-bottom: 1px solid var(--color-border);
  align-items: center;
  flex-shrink: 0;
}

.filter-select {
  padding: var(--spacing-xs) var(--spacing-sm);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  color: var(--color-text);
  font-size: 0.75rem;
}

.filter-search {
  padding: var(--spacing-xs) var(--spacing-sm);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  color: var(--color-text);
  font-size: 0.75rem;
  flex: 0 1 200px;
}
.filter-search:focus { outline: none; border-color: var(--color-primary); }

.filter-toggle {
  padding: var(--spacing-xs) var(--spacing-sm);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  color: var(--color-text-muted);
  font-size: 0.75rem;
  cursor: pointer;
  font-weight: 500;
}
.filter-toggle.active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: white;
}

.filter-count {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  margin-left: auto;
}

/* ==========================================================================
   Responsive Breakpoints
   ========================================================================== */

/* --- Tablets Portrait / Large Phones (≤ 768px) --- */
@media (max-width: 768px) {
  .filter-bar {
    flex-wrap: wrap;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
  }

  .filter-search {
    flex: 1 1 160px;
  }

  .search-dropdown {
    left: var(--spacing-md);
    right: var(--spacing-md);
    max-height: 50vh;
  }

  .codex-sub-tabs,
  .chronicle-sub-tabs {
    flex-wrap: wrap;
  }

  .tab-nav {
    padding: 0 var(--spacing-md);
    gap: 0;
  }

  .tab-btn {
    padding: 0 var(--spacing-md);
    font-size: 0.8125rem;
  }
}

/* --- Phones (≤ 480px) --- */
@media (max-width: 480px) {
  .tab-btn {
    font-size: 0.8125rem;
    padding: 0 var(--spacing-sm);
  }

  .filter-search {
    flex: 1 1 100%;
    font-size: 16px;
  }

  .filter-select {
    font-size: 0.7rem;
  }

  .filter-bar {
    padding: var(--spacing-xs) var(--spacing-sm);
  }

  .filter-toggle {
    font-size: 0.7rem;
    padding: var(--spacing-xs) 6px;
  }

  .tab-nav {
    padding: 0 var(--spacing-sm);
  }

  .global-search-input {
    font-size: 16px;
  }

  .search-dropdown {
    left: var(--spacing-sm);
    right: var(--spacing-sm);
  }
}