/* ==========================================================================
   Sidebar — CoachOS Design System
   Fixed sidebar with collapsible state
   ========================================================================== */

/* Sidebar Shell
   ========================================================================== */

.sidebar {
  --sidebar-bg: var(--surface-neutral);
  --sidebar-border: var(--border-subtle);
  --sidebar-text: var(--text-secondary);
  --sidebar-text-strong: var(--text-primary);
  --sidebar-text-muted: var(--text-tertiary);
  --sidebar-hover: var(--surface-neutral);
  --sidebar-selected: var(--border-subtle);
  --sidebar-accent: var(--brand-600);
  --sidebar-overlay: var(--surface-base);
  --sidebar-font: 'Sora', system-ui, -apple-system, sans-serif;

  font-family: var(--sidebar-font);
  font-size: var(--text-sm);
  line-height: var(--leading-normal);

  width: 100%;
  height: 100%;
  background-color: var(--sidebar-bg);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.app-shell--sidebar-collapsed .nav-text {
  opacity: 0;
  width: 0;
  overflow: hidden;
}

.app-shell--sidebar-collapsed .nav-section-label {
  opacity: 0;
  height: 0;
  padding: 0;
  margin: 0;
  overflow: hidden;
}

.app-shell--sidebar-collapsed .brand-logo {
  opacity: 0;
  width: 0;
  overflow: hidden;
}

.app-shell--sidebar-collapsed .sidebar-collapse-toggle .nav-text {
  display: none;
}

.app-shell--sidebar-collapsed .sidebar-header {
  justify-content: center;
}

.app-shell--sidebar-collapsed .sidebar-brand {
  display: none;
}

.app-shell--sidebar-collapsed .sidebar-nav {
  overflow-x: hidden;
}

.app-shell--sidebar-collapsed .nav-item {
  justify-content: center;
  padding-left: 0;
  padding-right: 0;
}

.app-shell--sidebar-collapsed .sidebar-selector {
  display: none;
}

.app-shell--sidebar-collapsed .sidebar-footer {
  align-items: center;
}

.app-shell--sidebar-collapsed .sidebar-footer .nav-item {
  gap: 0;
}

/* Header
   ========================================================================== */

.sidebar-header {
  height: var(--topbar-height);
  padding: 0 var(--space-4);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  border-bottom: 1px solid var(--sidebar-border);
  flex-shrink: 0;
}

.sidebar-brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  overflow: hidden;
}

.brand-logo {
  font-size: var(--text-lg);
  font-weight: 800;
  color: var(--sidebar-accent);
  white-space: nowrap;
  transition: opacity var(--duration-fast), width var(--duration-fast);
}

.sidebar-collapse-toggle {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2);
  border-radius: var(--radius-md);
  background: transparent;
  border: none;
  cursor: pointer;
  color: var(--sidebar-text-muted);
  font-size: var(--text-sm);
  white-space: nowrap;
  transition: all var(--duration-fast);
}

.sidebar-collapse-toggle:hover {
  background-color: var(--sidebar-hover);
  color: var(--sidebar-text-strong);
}

/* Nav Area
   ========================================================================== */

.sidebar-nav {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-2);
}

/* Sections
   ========================================================================== */

.nav-section {
  margin-bottom: var(--space-4);
}

.nav-section-label {
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--sidebar-text-muted);
  padding: var(--space-2) var(--space-3);
  font-weight: 600;
  transition: opacity var(--duration-fast), height var(--duration-fast);
}

/* Nav Items (Links)
   ========================================================================== */

.nav-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-lg);
  color: var(--sidebar-text);
  font-size: var(--text-sm);
  text-decoration: none;
  transition: all var(--duration-fast);
  white-space: nowrap;
}

.nav-item:hover {
  background-color: var(--sidebar-hover);
  color: var(--sidebar-text-strong);
}

.nav-item.active {
  background-color: var(--sidebar-selected);
  color: var(--sidebar-accent);
  font-weight: 600;
  box-shadow: inset 3px 0 0 var(--sidebar-accent);
}

.nav-item .material-symbols-rounded {
  font-size: 20px;
  flex-shrink: 0;
}

.nav-text {
  transition: opacity var(--duration-fast), width var(--duration-fast);
}

/* Footer
   ========================================================================== */

.sidebar-footer {
  padding: var(--space-3);
  border-top: 1px solid var(--sidebar-border);
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

/* Selector Dropdown (coach + membership selectors)
   ========================================================================== */

.sidebar-selector {
  padding: var(--space-2) var(--space-3);
  position: relative;
}

.sidebar-nav .sidebar-selector {
  padding: 0;
  border-bottom: none;
}

.sidebar-selector__trigger {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  width: 100%;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  background: transparent;
  border: none;
  cursor: pointer;
  color: var(--sidebar-text);
  font-size: var(--text-sm);
  transition: all var(--duration-fast);
}

.sidebar-selector__trigger:hover {
  background-color: var(--sidebar-hover);
}

.sidebar-selector__trigger--static {
  cursor: default;
}

.sidebar-selector__trigger--static:hover {
  background-color: transparent;
}

.sidebar-selector__chevron {
  margin-left: auto;
  font-size: 18px;
}

.sidebar-selector__dropdown {
  position: absolute;
  left: 0;
  right: 0;
  top: 100%;
  background: var(--sidebar-overlay);
  border: 1px solid var(--sidebar-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  z-index: 10;
  padding: var(--space-1);
}

.sidebar-selector__option {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  width: 100%;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  border: none;
  background: transparent;
  cursor: pointer;
  color: var(--sidebar-text);
  font-size: var(--text-sm);
  text-decoration: none;
  text-align: left;
  transition: background-color var(--duration-fast);
}

.sidebar-selector__option:hover {
  background-color: var(--sidebar-hover);
}

.sidebar-selector__option--active {
  color: var(--sidebar-accent);
  font-weight: 600;
}

.sidebar-selector__dropdown .button_to {
  display: contents;
}

/* Hidden State */
.sidebar--hidden .sidebar {
  display: none;
}

/* Mobile — sidebar becomes a slide-over overlay with backdrop.
   Always full-width with labels, even if desktop state is collapsed.
   Slides over content — content does NOT shift. */
@media (max-width: 768px) {
  .sidebar,
  .app-shell--sidebar-collapsed .sidebar {
    transform: translateX(-100%);
    transition: transform var(--duration-normal) var(--ease-out);
    z-index: var(--z-modal);
    width: 280px;
    box-shadow: var(--shadow-xl);
  }

  /* Override ALL collapsed-state rules — mobile always shows full sidebar */
  .app-shell--sidebar-collapsed .nav-text {
    opacity: 1;
    width: auto;
    overflow: visible;
  }
  .app-shell--sidebar-collapsed .nav-section-label {
    opacity: 1;
    height: auto;
    padding: var(--space-2) var(--space-3);
    margin: 0;
    overflow: visible;
  }
  .app-shell--sidebar-collapsed .brand-logo {
    opacity: 1;
    width: auto;
    overflow: visible;
  }
  .app-shell--sidebar-collapsed .sidebar-header {
    justify-content: space-between;
  }
  .app-shell--sidebar-collapsed .sidebar-brand {
    display: flex;
  }
  .app-shell--sidebar-collapsed .nav-item {
    justify-content: flex-start;
    padding-left: var(--space-3);
    padding-right: var(--space-3);
  }
  .app-shell--sidebar-collapsed .sidebar-selector {
    display: block;
  }
  .app-shell--sidebar-collapsed .sidebar-footer {
    align-items: stretch;
  }
  .app-shell--sidebar-collapsed .sidebar-footer .nav-item {
    gap: var(--space-3);
  }

  /* Backdrop: dims content, blocks interaction, closes sidebar on tap */
  .workspace-layout::before {
    content: "";
    position: fixed;
    inset: 0;
    z-index: calc(var(--z-modal) - 1);
    background: rgba(0, 0, 0, 0.3);
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--duration-normal) var(--ease-out);
  }

  .sidebar--open .sidebar,
  .sidebar--open.app-shell--sidebar-collapsed .sidebar {
    transform: translateX(0);
  }

  .sidebar--open::before {
    opacity: 1;
    pointer-events: auto;
  }

  /* Prevent content scroll when sidebar is open */
  .sidebar--open .workspace-main {
    overflow: hidden;
  }

  /* Desktop collapse toggle not needed on mobile */
  .sidebar-collapse-toggle {
    display: none;
  }
}

/* Readonly State (participation dashboard — read-only mode)
   ========================================================================== */

.sidebar--readonly .sidebar-nav .nav-item {
  color: var(--text-disabled);
  pointer-events: none;
}

.sidebar--readonly .sidebar-nav .nav-item:hover {
  background-color: transparent;
}

.sidebar--readonly .sidebar-nav .nav-item .material-symbols-rounded {
  color: var(--text-disabled);
}

.sidebar--readonly .sidebar-selector__trigger:not(.sidebar-selector__trigger--static) {
  pointer-events: none;
  cursor: default;
}

.sidebar--readonly .sidebar-selector__chevron {
  display: none;
}

/* Coach logo in sidebar header */
.coach-logo--sidebar {
  max-height: var(--topbar-logo-height);
  width: auto;
  object-fit: contain;
}