/* Sidebar theme system. See docs/11-sidebar-theme-system.md. These variables are scoped to
   .app-sidebar so they can never leak into or override global semantic tokens.

   Visual note: the sidebar background is rendered as a subtle gradient FROM the user's chosen
   --sidebar-bg color TOWARD a fixed premium purple, via color-mix(). This gives every preset
   (including custom colors) the dark-navy-to-purple depth in the reference design while still
   being fully driven by the single stored hex value — the theming system, contrast validation,
   and JS in components/sidebar.js are completely unchanged. */

.app-sidebar {
  --sidebar-bg: #0A1230;
  --sidebar-text: #FFFFFF;
  --sidebar-muted-text: rgba(255, 255, 255, 0.64);
  --sidebar-hover: rgba(255, 255, 255, 0.08);
  --sidebar-active-bg: #4E51D9;
  --sidebar-active-text: #FFFFFF;
  --sidebar-border: rgba(255, 255, 255, 0.10);

  background:
    radial-gradient(320px 260px at 20% 100%, rgba(88, 71, 231, .16), transparent 70%),
    linear-gradient(180deg, var(--sidebar-bg) 0%, color-mix(in srgb, var(--sidebar-bg) 84%, #26377E 16%) 100%);
  color: var(--sidebar-text);
  border-right: 1px solid var(--sidebar-border);
  box-shadow: 6px 0 24px rgba(8, 14, 39, .08);
}

.sidebar-brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: 5px 9px 18px;
  font-weight: 700;
  font-size: var(--font-size-lg);
  letter-spacing: 0.01em;
}

.sidebar-nav {
  display: flex;
  flex-direction: column;
  gap: 2px;
  flex: 1;
  overflow-y: auto;
}

.sidebar-nav-group-title {
  padding: 14px 9px 4px;
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--sidebar-muted-text);
}
.sidebar-nav-group-title:first-child {
  padding-top: var(--space-1);
}

.sidebar-nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 36px;
  padding: 8px 10px;
  border-radius: var(--radius-sm);
  color: var(--sidebar-text);
  font-size: var(--font-size-sm);
  font-weight: 500;
  transition: background var(--transition-fast), transform var(--transition-fast);
}

.sidebar-nav-item .nav-icon {
  width: 16px;
  height: 16px;
}

.sidebar-brand-icon {
  width: 22px;
  height: 22px;
}

.sidebar-nav-item:hover {
  background: var(--sidebar-hover);
  transform: translateX(1px);
}

.sidebar-nav-item.active {
  background: var(--sidebar-active-bg);
  color: var(--sidebar-active-text);
  box-shadow: 0 4px 12px rgba(var(--color-primary-rgb), 0.28);
}

.sidebar-nav-item .nav-label {
  color: var(--sidebar-muted-text);
}
.sidebar-nav-item.active .nav-label,
.sidebar-nav-item:hover .nav-label {
  color: inherit;
}

.sidebar-footer {
  border-top: 1px solid var(--sidebar-border);
  padding-top: var(--space-3);
  margin-top: var(--space-3);
}
.sidebar-profile {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 10px 2px;
  min-width: 0;
}
.sidebar-profile .avatar {
  background: rgba(255,255,255,.14);
  color: #fff;
}
.sidebar-profile-copy {
  min-width: 0;
  line-height: 1.25;
}
.sidebar-profile-name {
  color: var(--sidebar-text);
  font-size: 12px;
  font-weight: 650;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.sidebar-profile-role {
  color: var(--sidebar-muted-text);
  font-size: 10px;
  margin-top: 2px;
}

/* Sidebar color swatches used in Settings -> Appearance */
.sidebar-swatch-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(64px, 1fr));
  gap: var(--space-3);
}

.sidebar-swatch {
  width: 100%;
  aspect-ratio: 1;
  border-radius: var(--radius-md);
  border: 2px solid transparent;
  cursor: pointer;
  position: relative;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-fast), border-color var(--transition-fast);
}

.sidebar-swatch:hover {
  transform: translateY(-2px);
}

.sidebar-swatch.selected {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-soft);
}

.sidebar-swatch-label {
  font-size: var(--font-size-xs);
  text-align: center;
  margin-top: var(--space-1);
  color: var(--color-text-secondary);
}

.sidebar-contrast-warning {
  color: var(--color-danger);
  font-size: var(--font-size-xs);
  margin-top: var(--space-2);
}

.sidebar-preview-frame {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  width: 220px;
  box-shadow: var(--shadow-sm);
}