/* ============================================
   Sidebar Navigation — World-Class Left Nav
   All classes prefixed sb- to avoid conflicts
   ============================================ */

/* Anti-FOUC: applied by inline <script> before paint */
html.sb-collapsed-init .sb-sidebar { width: 64px !important; transition: none !important; }
html.sb-collapsed-init .sb-page-content { margin-left: 64px !important; transition: none !important; }

/* ---- Sidebar Shell ---- */
.sb-sidebar {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: 240px;
  z-index: 100;
  display: flex;
  flex-direction: column;
  background: var(--card);
  border-right: 1px solid var(--border);
  transition: width 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  overflow: hidden;
  font-family: 'Space Grotesk', system-ui, -apple-system, sans-serif;
}

.sb-sidebar.sb-collapsed {
  width: 64px;
}

/* ---- Page Content Wrapper ---- */
.sb-page-content {
  margin-left: 240px;
  min-height: 100vh;
  transition: margin-left 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  overflow-x: hidden;
  max-width: calc(100vw - 240px);
}

body.sb-collapsed .sb-page-content {
  margin-left: 64px;
  max-width: calc(100vw - 64px);
}

/* ---- Header ---- */
.sb-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 12px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
  min-height: 56px;
  gap: 8px;
}

.sb-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  overflow: hidden;
  min-width: 0;
}

.sb-logo-icon {
  width: 28px;
  height: 28px;
  flex-shrink: 0;
  color: var(--accent);
}

.sb-logo-text {
  font-weight: 700;
  font-size: 0.95rem;
  white-space: nowrap;
  overflow: hidden;
  color: var(--ink);
  transition: opacity 0.2s, max-width 0.25s;
  max-width: 160px;
}

.sb-sidebar.sb-collapsed .sb-logo-text {
  opacity: 0;
  max-width: 0;
  pointer-events: none;
}

.sb-collapse-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  flex-shrink: 0;
  transition: color 0.15s, background 0.15s;
}

.sb-collapse-btn:hover {
  color: var(--ink);
  background: var(--panel);
}

.sb-collapse-btn svg {
  width: 16px;
  height: 16px;
  transition: transform 0.25s;
}

.sb-sidebar.sb-collapsed .sb-collapse-btn svg {
  transform: rotate(180deg);
}

/* ---- Navigation ---- */
.sb-nav {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 8px;
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
}

.sb-nav::-webkit-scrollbar {
  width: 4px;
}

.sb-nav::-webkit-scrollbar-track {
  background: transparent;
}

.sb-nav::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 4px;
}

/* ---- Groups ---- */
.sb-group {
  margin-bottom: 2px;
}

.sb-group + .sb-group {
  border-top: 1px solid var(--border);
  padding-top: 6px;
  margin-top: 6px;
}

.sb-group-label {
  font-size: 0.6rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--muted);
  padding: 10px 12px 4px;
  opacity: 0.65;
  white-space: nowrap;
  overflow: hidden;
  transition: opacity 0.15s;
  font-weight: 600;
}

.sb-sidebar.sb-collapsed .sb-group-label {
  opacity: 0;
  height: 0;
  padding: 0;
  margin: 0;
  overflow: hidden;
}

/* ---- Nav Items ---- */
.sb-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 8px 12px;
  border-radius: 8px;
  color: var(--muted);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  white-space: nowrap;
  overflow: hidden;
  border: none;
  background: transparent;
  width: 100%;
  text-align: left;
  font-family: inherit;
  transition: background 0.15s, color 0.15s;
  position: relative;
}

.sb-item:hover {
  background: var(--panel);
  color: var(--ink);
}

.sb-item.sb-active {
  background: rgba(117, 240, 199, 0.1);
  color: var(--accent);
  font-weight: 600;
}

body.theme-light .sb-item.sb-active {
  background: rgba(16, 185, 129, 0.1);
}

.sb-item.sb-active .sb-icon {
  color: var(--accent);
}

/* ---- Icons ---- */
.sb-icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  color: currentColor;
}

.sb-item:hover .sb-icon {
  color: var(--ink);
}

.sb-item.sb-active .sb-icon {
  color: var(--accent);
}

/* ---- Labels ---- */
.sb-label {
  overflow: hidden;
  text-overflow: ellipsis;
  transition: opacity 0.15s, max-width 0.25s;
  max-width: 160px;
}

.sb-sidebar.sb-collapsed .sb-label {
  opacity: 0;
  max-width: 0;
  pointer-events: none;
}

/* ---- Collapsed: center icons ---- */
.sb-sidebar.sb-collapsed .sb-item {
  justify-content: center;
  padding: 10px;
}

.sb-sidebar.sb-collapsed .sb-header {
  justify-content: center;
  padding: 16px 8px;
}

.sb-sidebar.sb-collapsed .sb-logo {
  justify-content: center;
}

.sb-sidebar.sb-collapsed .sb-collapse-btn {
  display: none;
}

/* Show collapse button as a centered item when collapsed */
.sb-sidebar.sb-collapsed .sb-expand-zone {
  display: flex;
  justify-content: center;
  padding: 4px 0;
}

/* ---- Tooltips (collapsed state) ---- */
.sb-item[data-tooltip]::after {
  content: attr(data-tooltip);
  position: absolute;
  left: calc(100% + 12px);
  top: 50%;
  transform: translateY(-50%);
  background: var(--card);
  color: var(--ink);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 4px 10px;
  font-size: 0.78rem;
  font-weight: 500;
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.15s;
  z-index: 200;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

/* Only show tooltips when collapsed */
.sb-sidebar:not(.sb-collapsed) .sb-item[data-tooltip]::after {
  display: none;
}

.sb-sidebar.sb-collapsed .sb-item[data-tooltip]:hover::after {
  opacity: 1;
}

/* ---- Footer ---- */
.sb-footer {
  border-top: 1px solid var(--border);
  padding: 8px;
  flex-shrink: 0;
}

.sb-avatar {
  width: 30px;
  height: 30px;
  border-radius: 8px;
  background: rgba(117, 240, 199, 0.12);
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.75rem;
  flex-shrink: 0;
  letter-spacing: 0.02em;
}

body.theme-light .sb-avatar {
  background: rgba(16, 185, 129, 0.12);
}

.sb-user-name {
  font-weight: 500;
}

/* ---- Notification Bell ---- */
.sb-notif-wrapper {
  position: relative;
}

.sb-notif-badge {
  position: absolute;
  top: 4px;
  right: 8px;
  min-width: 16px;
  height: 16px;
  padding: 0 4px;
  background: #ef4444;
  color: white;
  font-size: 0.65rem;
  font-weight: 700;
  border-radius: 999px;
  display: none;
  align-items: center;
  justify-content: center;
  line-height: 1;
}

.sb-sidebar.sb-collapsed .sb-notif-badge {
  top: 2px;
  right: 2px;
}

/* ---- Mobile ---- */
.sb-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 99;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s;
}

.sb-overlay.sb-active {
  opacity: 1;
  pointer-events: auto;
}

.sb-mobile-trigger {
  display: none;
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 98;
  width: 40px;
  height: 40px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--ink);
  cursor: pointer;
  align-items: center;
  justify-content: center;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
  transition: background 0.15s;
}

.sb-mobile-trigger:hover {
  background: var(--panel);
}

.sb-mobile-trigger svg {
  width: 20px;
  height: 20px;
}

/* ---- Responsive ---- */
@media (max-width: 900px) {
  .sb-sidebar {
    width: 280px;
    transform: translateX(-100%);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: none;
    z-index: 1000;
  }

  .sb-sidebar.sb-mobile-open {
    transform: translateX(0);
    box-shadow: 4px 0 24px rgba(0, 0, 0, 0.3);
  }

  /* On mobile, ignore collapsed state — always full width when open */
  .sb-sidebar.sb-collapsed {
    width: 280px;
  }

  .sb-sidebar.sb-collapsed .sb-label,
  .sb-sidebar.sb-collapsed .sb-group-label,
  .sb-sidebar.sb-collapsed .sb-logo-text,
  .sb-sidebar.sb-collapsed .sb-user-name {
    opacity: 1;
    max-width: 160px;
    height: auto;
    padding: inherit;
  }

  .sb-sidebar.sb-collapsed .sb-group-label {
    padding: 10px 12px 4px;
    opacity: 0.65;
  }

  .sb-sidebar.sb-collapsed .sb-item {
    justify-content: flex-start;
    padding: 8px 12px;
  }

  .sb-sidebar.sb-collapsed .sb-header {
    justify-content: space-between;
    padding: 16px 12px;
  }

  .sb-sidebar.sb-collapsed .sb-collapse-btn {
    display: none;
  }

  /* Page content takes full width on mobile */
  .sb-page-content {
    margin-left: 0 !important;
    max-width: 100vw !important;
  }

  .sb-mobile-trigger {
    display: flex;
  }

  /* Hide desktop collapse button on mobile */
  .sb-collapse-btn {
    display: none;
  }

  /* Ensure page content has top padding for mobile trigger */
  .sb-page-content {
    padding-top: 0;
  }
}

@media (min-width: 901px) {
  .sb-overlay {
    display: none;
  }

  .sb-mobile-trigger {
    display: none;
  }
}

/* ---- Transitions cleanup after init ---- */
html.sb-ready .sb-sidebar,
html.sb-ready .sb-page-content {
  transition: width 0.25s cubic-bezier(0.4, 0, 0.2, 1),
              margin-left 0.25s cubic-bezier(0.4, 0, 0.2, 1),
              transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}