/* ============================================================
   TEACHER BREADCRUMB NAV — Simple inline path
   Used by: T2, T3, T4, T5
   ============================================================ */
.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
  font-size: 12px;
  font-family: var(--font-body);
  color: var(--text-secondary);
  margin-bottom: 20px;
}

.breadcrumb a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.2s ease;
}

.breadcrumb a:hover {
  color: var(--color-primary);
}

[data-theme="dark"] .breadcrumb a:hover {
  color: var(--color-accent);
}

.breadcrumb svg {
  width: 12px;
  height: 12px;
  flex-shrink: 0;
  opacity: 0.5;
}

.breadcrumb-current {
  color: var(--text-primary);
  font-weight: 600;
}

.breadcrumb-label {
  font-weight: 600;
  opacity: 0.5;
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.4px;
  margin-right: -2px;
}

/* ============================================================
   BREADCRUMB SUB-HEADER — Hinbuna Kurdi
   Compact two-line navigation bar below the main header.
   Line 1: Clickable hierarchy labels with dropdown pickers.
   Line 2: Italic current context values.
   ============================================================ */

.breadcrumb-bar {
  position: sticky;
  top: 56px; /* below app-header */
  z-index: 99;
  background-color: var(--bg-page);
  border-bottom: 1px solid var(--border);
  transition: background-color 0.3s ease, border-color 0.3s ease;
}

.breadcrumb-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 600px;
  margin: 0 auto;
  padding: 6px 20px;
  gap: 12px;
  min-height: 42px;
}

/* ============================================
   LEFT: Breadcrumb path (two lines)
   ============================================ */
.breadcrumb-path {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 0;
}

/* Line 1: Clickable labels — Course › Unit › Lesson */
.breadcrumb-labels {
  display: flex;
  align-items: center;
  gap: 0;
  flex-wrap: nowrap;
  position: relative;
}

.breadcrumb-label {
  font-family: var(--font-body, 'Inter', sans-serif);
  font-size: 11px;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  cursor: pointer;
  padding: 2px 0;
  border: none;
  background: none;
  white-space: nowrap;
  transition: color 0.15s ease;
  position: relative;
}

.breadcrumb-label:hover {
  color: var(--color-accent, #D4A843);
}

/* Active label (current depth) — non-clickable */
.breadcrumb-label.current {
  color: var(--text-primary);
  cursor: default;
}

.breadcrumb-label.current:hover {
  color: var(--text-primary);
}

/* Chevron separator */
.breadcrumb-sep {
  font-size: 10px;
  color: var(--text-secondary);
  opacity: 0.4;
  margin: 0 5px;
  user-select: none;
}

/* Line 2: Current context values */
.breadcrumb-values {
  display: flex;
  align-items: center;
  gap: 0;
  overflow: hidden;
}

.breadcrumb-value {
  font-family: var(--font-body, 'Inter', sans-serif);
  font-size: 12px;
  font-weight: 400;
  font-style: italic;
  color: var(--text-secondary);
  opacity: 0.7;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.breadcrumb-value-sep {
  font-size: 9px;
  font-style: normal;
  color: var(--text-secondary);
  opacity: 0.3;
  margin: 0 4px;
  flex-shrink: 0;
}

/* ============================================
   RIGHT: Action icons
   ============================================ */
.breadcrumb-actions {
  display: flex;
  align-items: center;
  gap: 2px;
  flex-shrink: 0;
}

.breadcrumb-action-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  border: none;
  background: none;
  border-radius: var(--radius-sm, 8px);
  cursor: pointer;
  color: var(--text-secondary);
  transition: background-color 0.15s ease, color 0.15s ease;
}

.breadcrumb-action-btn:hover {
  background-color: var(--bg-surface);
  color: var(--text-primary);
}

.breadcrumb-action-btn svg {
  width: 16px;
  height: 16px;
}

.breadcrumb-action-btn.close-btn:hover {
  color: var(--color-error, #DC4545);
}

/* ============================================
   DROPDOWN PICKER
   ============================================ */
.breadcrumb-dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  margin-top: 4px;
  min-width: 260px;
  max-width: 320px;
  max-height: 360px;
  overflow-y: auto;
  background-color: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md, 12px);
  box-shadow: var(--shadow-lg);
  z-index: 300;
  padding: 0;
  opacity: 0;
  transform: translateY(-4px);
  pointer-events: none;
  transition: opacity 0.15s ease, transform 0.15s ease;
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
}

.breadcrumb-dropdown::-webkit-scrollbar {
  width: 5px;
}
.breadcrumb-dropdown::-webkit-scrollbar-track {
  background: transparent;
}
.breadcrumb-dropdown::-webkit-scrollbar-thumb {
  background-color: var(--border);
  border-radius: 4px;
}

.breadcrumb-dropdown.open {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

/* Dropdown title header */
.breadcrumb-dropdown-title {
  display: block;
  font-family: var(--font-body, 'Inter', sans-serif);
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  color: var(--text-secondary);
  opacity: 0.6;
  padding: 10px 16px 6px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 4px;
  user-select: none;
}

/* Group wrapper for item sections */
.breadcrumb-dropdown-group {
  padding: 4px 0;
}

/* Separator between done/active items and locked items */
.breadcrumb-dropdown-separator {
  height: 1px;
  background-color: var(--border);
  margin: 4px 14px;
  opacity: 0.7;
}

/* ============================================
   DROPDOWN ITEMS — Base
   ============================================ */
.breadcrumb-dropdown-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px 10px 14px;
  min-height: 44px;
  font-family: var(--font-body, 'Inter', sans-serif);
  font-size: 13px;
  font-weight: 500;
  color: var(--text-primary);
  text-decoration: none;
  transition: background-color 0.15s ease, border-color 0.15s ease;
  cursor: pointer;
  border-left: 3px solid transparent;
  position: relative;
  box-sizing: border-box;
}

/* ============================================
   STATE: Done (completed, clickable)
   "You can go here"
   ============================================ */
.breadcrumb-dropdown-item.done {
  color: var(--text-primary);
  font-weight: 500;
  cursor: pointer;
}

.breadcrumb-dropdown-item.done:hover {
  background-color: rgba(45, 138, 78, 0.08);
  border-left-color: var(--color-success, #2D8A4E);
}

.breadcrumb-dropdown-item.done .dd-check {
  width: 16px;
  height: 16px;
  color: var(--color-success, #2D8A4E);
  flex-shrink: 0;
}

/* ============================================
   STATE: Active (current item)
   "You are here"
   ============================================ */
.breadcrumb-dropdown-item.active {
  background-color: rgba(212, 168, 67, 0.12);
  border-left-color: var(--color-accent, #D4A843);
  color: var(--color-accent, #D4A843);
  font-weight: 700;
  cursor: default;
}

/* Active dot indicator (left side, after the border) */
.breadcrumb-dropdown-item.active .dd-active-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background-color: var(--color-accent, #D4A843);
  flex-shrink: 0;
  box-shadow: 0 0 0 2px rgba(212, 168, 67, 0.25);
}

/* Active item should NOT highlight on hover (it's not a navigation target) */
.breadcrumb-dropdown-item.active:hover {
  background-color: rgba(212, 168, 67, 0.12);
}

/* In-progress dot (active unit the user is working on, but not the one currently viewed) */
.breadcrumb-dropdown-item .dd-in-progress {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  border: 2px solid var(--color-accent, #D4A843);
  background: linear-gradient(to top, var(--color-accent, #D4A843) 50%, transparent 50%);
  flex-shrink: 0;
}

/* ============================================
   STATE: Upcoming (next available)
   "Coming up next"
   ============================================ */
.breadcrumb-dropdown-item.upcoming {
  color: var(--text-secondary);
  opacity: 0.65;
  cursor: default;
  font-weight: 500;
}

.breadcrumb-dropdown-item.upcoming:hover {
  background-color: rgba(212, 168, 67, 0.05);
}

.breadcrumb-dropdown-item .dd-future {
  width: 16px;
  height: 16px;
  color: var(--color-accent, #D4A843);
  opacity: 0.6;
  flex-shrink: 0;
}

/* ============================================
   STATE: Locked (unavailable)
   "Not available yet"
   ============================================ */
.breadcrumb-dropdown-item.locked {
  color: var(--text-secondary);
  opacity: 0.35;
  cursor: not-allowed;
  font-weight: 400;
}

.breadcrumb-dropdown-item.locked:hover {
  background-color: transparent;
  border-left-color: transparent;
}

.breadcrumb-dropdown-item.locked span {
  opacity: 0.9;
}

.breadcrumb-dropdown-item .dd-lock {
  width: 16px;
  height: 16px;
  color: var(--text-secondary);
  opacity: 0.5;
  flex-shrink: 0;
}

/* Done item checkmark (fallback for non-.done class usage) */
.breadcrumb-dropdown-item .dd-check {
  width: 16px;
  height: 16px;
  color: var(--color-success, #2D8A4E);
  flex-shrink: 0;
}

/* ============================================
   DARK MODE overrides
   ============================================ */
[data-theme="dark"] .breadcrumb-dropdown {
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.35);
}

[data-theme="dark"] .breadcrumb-dropdown-title {
  opacity: 0.5;
}

[data-theme="dark"] .breadcrumb-dropdown-item.active {
  background-color: rgba(212, 168, 67, 0.1);
}

[data-theme="dark"] .breadcrumb-dropdown-item.done:hover {
  background-color: rgba(45, 138, 78, 0.1);
}

[data-theme="dark"] .breadcrumb-dropdown-item.upcoming {
  opacity: 0.55;
}

[data-theme="dark"] .breadcrumb-dropdown-item.locked {
  opacity: 0.25;
}

[data-theme="dark"] .breadcrumb-dropdown-separator {
  opacity: 0.5;
}

/* Dropdown backdrop (for closing) */
.breadcrumb-backdrop {
  position: fixed;
  inset: 0;
  z-index: 98;
  display: none;
}

.breadcrumb-backdrop.open {
  display: block;
}