/* =============================================================================
   ArgusBoard Design System — sidebar.css
   Vertical sidebar navigation (replaces top navbar)
   ============================================================================= */

/* ---------------------------------------------------------------------------
   1. Sidebar shell — fixed left, 256px, dark chrome
   --------------------------------------------------------------------------- */
.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: 256px;
  background-color: rgba(30, 30, 30, 0.92);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border-right: 1px solid rgba(255, 255, 255, 0.08);
  display: flex;
  flex-direction: column;
  z-index: 100;
  overflow-y: auto;
  overflow-x: hidden;
  transition: width var(--transition-base);
}

/* Collapsed state (desktop) */
.sidebar.is-collapsed {
  width: 64px;
}

.sidebar.is-collapsed .sidebar-link-label,
.sidebar.is-collapsed .sidebar-subnav,
.sidebar.is-collapsed .sidebar-search,
.sidebar.is-collapsed .sidebar-link-chevron,
.sidebar.is-collapsed .sidebar-brand-logo {
  display: none;
}

.sidebar.is-collapsed .sidebar-link {
  justify-content: center;
  padding: var(--space-2);
}

.sidebar.is-collapsed .sidebar-collapse span::after {
  content: '»';
}

/* ---------------------------------------------------------------------------
   2. Header — logo + collapse button
   --------------------------------------------------------------------------- */
.sidebar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-4);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  flex-shrink: 0;
}

.sidebar-brand {
  display: flex;
  align-items: center;
  text-decoration: none;
  flex: 1;
  min-width: 0;
}

.sidebar-brand-logo {
  height: 35px;
  width: auto;
  flex-shrink: 0;
}

.sidebar-collapse {
  flex-shrink: 0;
  background: none;
  border: none;
  color: rgba(254, 254, 254, 0.5);
  font-size: 14px;
  cursor: pointer;
  padding: var(--space-1) var(--space-2);
  border-radius: 0;
  transition: color var(--transition-fast);
  line-height: 1;
}

.sidebar-collapse:hover {
  color: #fefefe;
}

/* ---------------------------------------------------------------------------
   3. Search
   --------------------------------------------------------------------------- */
.sidebar-search {
  position: relative;
  padding: var(--space-3) var(--space-4);
  flex-shrink: 0;
}

.sidebar-search-icon {
  position: absolute;
  left: calc(var(--space-4) + 2px);
  top: 50%;
  transform: translateY(-50%);
  color: rgba(254, 254, 254, 0.4);
  pointer-events: none;
  font-size: 13px;
}

.sidebar-search-input {
  width: 100%;
  height: 32px;
  padding: 0 var(--space-2) 0 calc(var(--space-3) * 2 + 1em);
  background-color: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.10);
  border-radius: 0;
  color: #fefefe;
  font-size: var(--font-size-xs);
  font-family: inherit;
  outline: none;
  transition: border-color var(--transition-base), background-color var(--transition-base);
  box-sizing: border-box;
}

.sidebar-search-input::placeholder {
  color: rgba(254, 254, 254, 0.4);
}

.sidebar-search-input:focus {
  border-color: var(--color-accent);
  background-color: rgba(255, 255, 255, 0.10);
}

/* ---------------------------------------------------------------------------
   4. Nav links
   --------------------------------------------------------------------------- */
.sidebar-nav {
  flex: 1;
  padding: var(--space-2) 0;
  overflow-y: auto;
}

.sidebar-link {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2) var(--space-4);
  color: rgba(254, 254, 254, 0.65);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  text-decoration: none;
  white-space: nowrap;
  transition: color var(--transition-fast), background-color var(--transition-fast);
  border-left: 2px solid transparent;
}

.sidebar-link:hover {
  color: #fefefe;
  background-color: rgba(255, 255, 255, 0.04);
  text-decoration: none;
}

.sidebar-link.is-active {
  color: #fefefe;
  background-color: rgba(255, 255, 255, 0.06);
  border-left-color: var(--color-accent);
}

.sidebar-link-icon {
  font-size: 16px;
  line-height: 1;
  flex-shrink: 0;
  width: 20px;
  text-align: center;
}

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

.sidebar-link-chevron {
  font-size: 14px;
  color: rgba(254, 254, 254, 0.4);
  transition: transform var(--transition-base);
  flex-shrink: 0;
}

.sidebar-section.is-open .sidebar-link-chevron {
  transform: rotate(90deg);
}

/* ---------------------------------------------------------------------------
   5. Sub-navigation (expandable)
   --------------------------------------------------------------------------- */
.sidebar-subnav {
  display: none;
  padding: var(--space-1) 0;
  background-color: rgba(0, 0, 0, 0.15);
}

.sidebar-section.is-open .sidebar-subnav {
  display: block;
}

/* Auto-expand if the active page is inside */
.sidebar-section:has(.sidebar-link-toggle.is-active) .sidebar-subnav {
  display: block;
}

.sidebar-section:has(.sidebar-link-toggle.is-active) .sidebar-link-chevron {
  transform: rotate(90deg);
}

.sidebar-sublink {
  display: block;
  padding: var(--space-2) var(--space-4) var(--space-2) calc(var(--space-4) * 2 + 20px);
  color: rgba(254, 254, 254, 0.55);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  text-decoration: none;
  transition: color var(--transition-fast), background-color var(--transition-fast);
  border-left: 2px solid transparent;
}

.sidebar-sublink:hover {
  color: #fefefe;
  background-color: rgba(255, 255, 255, 0.03);
  text-decoration: none;
}

.sidebar-sublink.is-active {
  color: #fefefe;
  border-left-color: var(--color-accent);
}

/* ---------------------------------------------------------------------------
   6. Footer — theme toggle + logout
   --------------------------------------------------------------------------- */
.sidebar-footer {
  flex-shrink: 0;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding: var(--space-2) 0;
}

.sidebar-toggle-btn {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  width: 100%;
  padding: var(--space-2) var(--space-4);
  background: none;
  border: none;
  color: rgba(254, 254, 254, 0.5);
  font-size: 15px;
  cursor: pointer;
  transition: color var(--transition-fast), background-color var(--transition-fast);
  text-align: left;
  border-left: 2px solid transparent;
}

.sidebar-toggle-btn:hover {
  color: #fefefe;
  background-color: rgba(255, 255, 255, 0.04);
}

.sidebar-toggle-btn-icon {
  width: 20px;
  text-align: center;
  flex-shrink: 0;
}

.sidebar-link-footer {
  border-left: none;
}

/* ---------------------------------------------------------------------------
   7. Layout shift — body gets left padding for the sidebar
   --------------------------------------------------------------------------- */
body.has-sidebar {
  padding-left: 256px;
  transition: padding-left var(--transition-base);
}

body.has-sidebar.sidebar-collapsed {
  padding-left: 64px;
}

/* ---------------------------------------------------------------------------
   8. Mobile — sidebar slides off-canvas
   --------------------------------------------------------------------------- */
.sidebar-backdrop {
  display: none;
  position: fixed;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.5);
  z-index: 99;
}

@media (max-width: 768px) {
  body.has-sidebar {
    padding-left: 0;
  }

  .sidebar {
    transform: translateX(-100%);
    width: 256px;
    transition: transform var(--transition-base);
  }

  .sidebar.is-open {
    transform: translateX(0);
  }

  .sidebar.is-collapsed {
    width: 256px;
  }

  .sidebar-backdrop.is-visible {
    display: block;
  }

  /* Mobile menu button (in content area) */
  .mobile-menu-btn {
    display: flex;
  }
}

/* Mobile menu button — hidden on desktop */
.mobile-menu-btn {
  display: none;
  position: fixed;
  top: var(--space-3);
  left: var(--space-3);
  z-index: 101;
  width: 40px;
  height: 40px;
  background-color: rgba(30, 30, 30, 0.86);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 0;
  color: #fefefe;
  font-size: 18px;
  cursor: pointer;
  align-items: center;
  justify-content: center;
}

@media (min-width: 769px) {
  .mobile-menu-btn {
    display: none;
  }
}