@import url('https://fonts.googleapis.com/css2?family=Montserrat:wght@700;800&display=swap');

/* ==========================================================================
   sidebar.css — Two-level navigation (icon rail + context sidebar)
   MakerCommand Admin SPA

   Layout: .sidebar is a 256 px flex-row container fixed to the left edge.
     .sidebar__rail    — 56 px icon-only column
     .sidebar__context — 200 px text column, content changes per section

   Total width matches the existing ml-64 (256 px) on the main content area,
   so no layout changes to the outer shell are needed.

   Naming: BEM-style  .sidebar__element--modifier
   Variables: defined in dashboard.css :root
   ========================================================================== */


/* --------------------------------------------------------------------------
   Outer shell — fixed, full-height, flex-row
   -------------------------------------------------------------------------- */
.sidebar {
  position: fixed;
  left:   0;
  top:    0;
  width:  256px;
  height: 100vh;
  display: flex;
  flex-direction: row;
  background: var(--colour-surface);
  border-right: 1px solid var(--colour-border);
  z-index: 40;
  transition: width 0.15s ease;
  overflow: hidden;
}

.sidebar--rail-only {
  width: 56px;
}

.sidebar--rail-only .sidebar__context {
  display: none;
}


/* ==========================================================================
   RAIL  (56 px icon column)
   ========================================================================== */

.sidebar__rail {
  width:     56px;
  min-width: 56px;
  height:    100%;
  background: var(--colour-bg-primary);
  border-right: 1px solid var(--colour-border);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

/* Rail header — matches main content header height */
.sidebar__rail-header {
  height:     60px;
  flex-shrink: 0;
  display:     flex;
  align-items: center;
  justify-content: center;
  border-bottom: 1px solid var(--colour-border);
}

.sidebar__rail-logo-mc {
  font-family: 'Montserrat', sans-serif;
  font-weight: 800;
  font-size:   1rem;
  letter-spacing: -0.03em;
  color: #2563eb;
  line-height: 1;
  user-select: none;
}

/* Rail nav — scrolls independently */
.sidebar__rail-nav {
  flex:         1;
  overflow-y:   auto;
  overflow-x:   hidden;
  padding:      0.5rem 0;
  scrollbar-width: none;
}
.sidebar__rail-nav::-webkit-scrollbar { display: none; }

.sidebar__rail-item {
  list-style: none;
}

/* Icon button */
.sidebar__rail-btn {
  position:  relative;
  display:   flex;
  align-items: center;
  justify-content: center;
  width:     100%;
  height:    44px;
  background: none;
  border:    none;
  border-left: 2px solid transparent;
  cursor:    pointer;
  color:     var(--colour-text-tertiary);
  transition:
    color       var(--transition-fast),
    background  var(--transition-fast),
    border-left-color var(--transition-fast);
}

.sidebar__rail-btn:hover {
  background: rgba(30, 42, 68, 0.05);
  color:      var(--colour-text-secondary);
}

.sidebar__rail-btn--active {
  color:       var(--colour-accent);
  background:  var(--colour-accent-light);
  border-left-color: var(--colour-accent);
}

.sidebar__rail-icon {
  width:    18px;
  height:   18px;
  flex-shrink: 0;
}

/* Tooltip — appears to the right of the button on hover */
.sidebar__rail-btn::after {
  content:    attr(data-tooltip);
  position:   absolute;
  left:       calc(100% + 8px);
  top:        50%;
  transform:  translateY(-50%);
  background: var(--colour-accent);
  color:      var(--colour-text-inverse);
  font-size:  0.6875rem;
  font-weight: 600;
  padding:    4px 10px;
  border-radius: 4px;
  white-space: nowrap;
  pointer-events: none;
  opacity:    0;
  transition: opacity 0.15s ease;
  z-index:    100;
}

.sidebar__rail-btn:hover::after {
  opacity: 1;
}

/* Rail badge — small dot on the icon for pending items */
.sidebar__rail-badge {
  display:   none;
  position:  absolute;
  top:       8px;
  right:     8px;
  min-width: 14px;
  height:    14px;
  padding:   0 3px;
  border-radius: 999px;
  background: var(--colour-accent);
  color:     var(--colour-text-inverse);
  font-size: 0.5rem;
  font-weight: 700;
  line-height: 14px;
  text-align: center;
}
.sidebar__rail-badge.sidebar__badge--visible { display: block; }


/* ==========================================================================
   CONTEXT PANEL  (200 px, changes per selected section)
   ========================================================================== */

.sidebar__context {
  flex:     1;
  display:  flex;
  flex-direction: column;
  overflow: hidden;
  background: var(--colour-surface);
}

/* Context header — shows the active section label */
.sidebar__ctx-header {
  height:     60px;
  flex-shrink: 0;
  display:    flex;
  align-items: center;
  padding:    0 1rem;
  border-bottom: 1px solid var(--colour-border);
  font-size:  0.6875rem;
  font-weight: 700;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color:      var(--colour-text-tertiary);
  white-space: nowrap;
  overflow:   hidden;
  text-overflow: ellipsis;
}

/* Context nav — scrollable items list */
.sidebar__ctx-nav {
  flex:       1;
  overflow-y: auto;
  overflow-x: hidden;
  padding:    0.75rem 0.5rem 1.5rem;
  scrollbar-width: thin;
  scrollbar-color: var(--colour-border) transparent;
}
.sidebar__ctx-nav::-webkit-scrollbar { width: 3px; }
.sidebar__ctx-nav::-webkit-scrollbar-track { background: transparent; }
.sidebar__ctx-nav::-webkit-scrollbar-thumb { background: var(--colour-border); border-radius: 2px; }

.sidebar__ctx-nav ul {
  list-style: none;
  margin:     0;
  padding:    0;
  display:    flex;
  flex-direction: column;
  gap:        2px;
}

.sidebar__ctx-item {
  /* layout handled by child <a> */
}

/* Context nav link */
.sidebar__ctx-link {
  display:    flex;
  align-items: center;
  gap:        0.5rem;
  padding:    0.5rem 0.625rem;
  border-radius: var(--radius-md);
  border-left: 2px solid transparent;
  color:      var(--colour-text-secondary);
  font-size:  0.8125rem;
  font-weight: 500;
  line-height: 1.4;
  text-decoration: none;
  white-space: nowrap;
  cursor:     pointer;
  transition:
    background        var(--transition-fast),
    color             var(--transition-fast),
    border-left-color var(--transition-fast);
}

.sidebar__ctx-link:hover {
  background: rgba(30, 42, 68, 0.04);
  color:      var(--colour-text-primary);
}

.sidebar__ctx-link--active {
  background:  rgba(30, 42, 68, 0.06);
  color:       var(--colour-accent);
  border-left-color: var(--colour-accent);
  font-weight: 600;
}

.sidebar__ctx-link--active:hover {
  background: rgba(30, 42, 68, 0.08);
}

.sidebar__ctx-icon {
  width:    14px;
  height:   14px;
  flex-shrink: 0;
  opacity:  0.5;
  transition: opacity var(--transition-fast);
}

.sidebar__ctx-link--active .sidebar__ctx-icon { opacity: 1; }
.sidebar__ctx-link:hover .sidebar__ctx-icon   { opacity: 0.75; }

.sidebar__ctx-label {
  flex:       1;
  min-width:  0;
  overflow:   hidden;
  text-overflow: ellipsis;
}


/* ==========================================================================
   SHARED BADGE  (per-item count badge, used in context panel)
   ========================================================================== */

.sidebar__link-badge {
  display:    none;
  align-items: center;
  justify-content: center;
  min-width:  1.0625rem;
  height:     1.0625rem;
  padding:    0 0.25rem;
  border-radius: 999px;
  background: var(--colour-accent);
  color:      var(--colour-text-inverse);
  font-size:  0.5625rem;
  font-weight: 700;
  line-height: 1;
  flex-shrink: 0;
}

.sidebar__link-badge.sidebar__badge--visible { display: inline-flex; }


/* ==========================================================================
   LEGACY FLAT LAYOUT  (education mode — standalone + collapsible sections)
   All of the following rules are only exercised when NAV_CONFIG_EDU is active.
   ========================================================================== */

/* Override: flat layout is a flex-column, not flex-row */
.sidebar:not(:has(.sidebar__rail)) {
  flex-direction: column;
}

.sidebar__wordmark {
  flex-shrink: 0;
  display:    flex;
  align-items: center;
  gap:        0.5rem;
  padding:    1.375rem 1.25rem 1.25rem;
  border-bottom: 1px solid var(--colour-border);
}

.sidebar__wordmark-text {
  font-size:   1rem;
  font-weight: 700;
  color:       var(--colour-text-primary);
  letter-spacing: -0.02em;
  line-height: 1;
  white-space: nowrap;
}

.sidebar__nav {
  flex:       1;
  overflow-y: auto;
  overflow-x: hidden;
  padding:    1rem 0.625rem 2rem;
  scrollbar-width: thin;
  scrollbar-color: var(--colour-border) transparent;
}
.sidebar__nav::-webkit-scrollbar { width: 3px; }
.sidebar__nav::-webkit-scrollbar-track { background: transparent; }
.sidebar__nav::-webkit-scrollbar-thumb { background: var(--colour-border); border-radius: 2px; }

.sidebar__standalone { margin-bottom: 0.5rem; }

.sidebar__standalone-link {
  display:    flex;
  align-items: center;
  gap:        0.625rem;
  padding:    0.625rem 0.75rem;
  border-radius: var(--radius-md);
  border-left: 2px solid transparent;
  color:      var(--colour-text-secondary);
  font-size:  0.8125rem;
  font-weight: 500;
  text-decoration: none;
  white-space: nowrap;
  cursor:     pointer;
  transition:
    background        var(--transition-fast),
    color             var(--transition-fast),
    border-left-color var(--transition-fast);
}

.sidebar__standalone-link:hover {
  background: rgba(30, 42, 68, 0.04);
  color:      var(--colour-text-primary);
}

.sidebar__standalone-link--active {
  background:  rgba(30, 42, 68, 0.06);
  color:       var(--colour-accent);
  border-left-color: var(--colour-accent);
  font-weight: 600;
}

.sidebar__standalone-label { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; }

.sidebar__divider {
  height:     1px;
  background: var(--colour-border);
  margin:     0.75rem 0 1rem;
}

.sidebar__sections {
  list-style: none;
  margin:     0;
  padding:    0;
  display:    flex;
  flex-direction: column;
  gap:        0.25rem;
}

.sidebar__section { border-radius: var(--radius-md); }

.sidebar__section-header {
  display:    flex;
  align-items: center;
  gap:        0.375rem;
  width:      100%;
  padding:    0.5625rem 0.5rem 0.5625rem 0.75rem;
  background: none;
  border:     none;
  border-radius: var(--radius-md);
  cursor:     pointer;
  user-select: none;
  transition:
    background var(--transition-fast),
    color      var(--transition-fast);
}

.sidebar__section-header:hover { background: rgba(30, 42, 68, 0.04); }

.sidebar__section-header-left {
  display:    flex;
  align-items: center;
  gap:        0.4375rem;
  flex:       1;
  min-width:  0;
}

.sidebar__section-label {
  font-size:  0.6875rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color:      var(--colour-text-tertiary);
  white-space: nowrap;
  overflow:   hidden;
  text-overflow: ellipsis;
}

.sidebar__section--has-active > .sidebar__section-header .sidebar__section-label {
  color: var(--colour-text-secondary);
}

.sidebar__section-badge {
  display:    none;
  align-items: center;
  justify-content: center;
  min-width:  1.0625rem;
  height:     1.0625rem;
  padding:    0 0.25rem;
  border-radius: 999px;
  background: var(--colour-accent);
  color:      var(--colour-text-inverse);
  font-size:  0.5625rem;
  font-weight: 700;
  line-height: 1;
  flex-shrink: 0;
}
.sidebar__section-badge.sidebar__badge--visible { display: inline-flex; }

.sidebar__items {
  list-style: none;
  margin:     0;
  padding:    0;
  overflow:   hidden;
  max-height: 0;
  transition: max-height var(--transition-base);
}

.sidebar__section--expanded > .sidebar__items {
  max-height:    640px;
  padding-bottom: 0.25rem;
}

.sidebar__item { /* styling on child <a> */ }

.sidebar__link {
  display:    flex;
  align-items: center;
  gap:        0.5rem;
  padding:    0.5625rem 0.75rem 0.5625rem 2rem;
  border-radius: var(--radius-md);
  border-left: 2px solid transparent;
  color:      var(--colour-text-secondary);
  font-size:  0.8125rem;
  font-weight: 500;
  text-decoration: none;
  white-space: nowrap;
  cursor:     pointer;
  user-select: none;
  transition:
    background        var(--transition-fast),
    color             var(--transition-fast),
    border-left-color var(--transition-fast);
}

.sidebar__link:hover {
  background: rgba(30, 42, 68, 0.04);
  color:      var(--colour-text-primary);
}

.sidebar__link--active {
  background:  rgba(30, 42, 68, 0.06);
  color:       var(--colour-accent);
  border-left-color: var(--colour-accent);
  font-weight: 600;
}

.sidebar__link-label { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; }