/* ── Sidebar (Desktop) ───────────────────────────────────── */
.sidebar-header {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-4);
  border-bottom: 1px solid var(--border);
  min-height: 60px;
  flex-shrink: 0;
}

.sidebar-logo {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: var(--accent-light);
  border: 1px solid rgba(88,101,242,0.3);
  border-radius: var(--radius-lg);
  color: var(--accent);
  flex-shrink: 0;
  transition: transform var(--transition-fast);
}
.sidebar-logo:hover { transform: scale(1.05); }

.sidebar-brand {
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  transition: opacity var(--transition-base), width var(--transition-base);
}

.sidebar-collapse-btn {
  margin-left: auto;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  background: transparent;
  border: none;
  border-radius: var(--radius-md);
  color: var(--text-muted);
  cursor: pointer;
  flex-shrink: 0;
  transition: background var(--transition-fast), color var(--transition-fast), transform var(--transition-base);
}
.sidebar-collapse-btn:hover { background: var(--bg-hover); color: var(--text-primary); }
.app-sidebar.collapsed .sidebar-collapse-btn { transform: rotate(180deg); }

/* Collapsed state */
.app-sidebar.collapsed .sidebar-brand { display: none; }
.app-sidebar.collapsed .sidebar-header {
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-2);
}
.app-sidebar.collapsed .sidebar-collapse-btn {
  margin-left: 0;
  transform: rotate(180deg);
}

/* Nav */
.sidebar-nav {
  flex: 1;
  padding: var(--space-3) var(--space-2);
  display: flex;
  flex-direction: column;
  gap: 2px;
  overflow-y: auto;
  overflow-x: hidden;
}

.nav-section-label {
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: var(--space-3) var(--space-3) var(--space-2);
  white-space: nowrap;
  overflow: hidden;
  transition: opacity var(--transition-base);
}
.app-sidebar.collapsed .nav-section-label { opacity: 0; }

.nav-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-size: var(--text-sm);
  font-weight: 500;
  cursor: pointer;
  text-decoration: none;
  transition: background var(--transition-fast), color var(--transition-fast);
  white-space: nowrap;
  position: relative;
  min-height: 40px;
  border: none;
  background: none;
  width: 100%;
  text-align: left;
}
.nav-item:hover { background: var(--bg-hover); color: var(--text-primary); }
.nav-item.active {
  background: var(--accent-light);
  color: var(--accent);
}
.nav-item.active .nav-item-icon { color: var(--accent); }

.nav-item-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  color: inherit;
}

.nav-item-label {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  transition: opacity var(--transition-base), width var(--transition-base);
}

.nav-item-badge {
  background: var(--accent);
  color: #fff;
  font-size: 10px;
  font-weight: 700;
  padding: 1px 5px;
  border-radius: var(--radius-full);
  line-height: 1.4;
  flex-shrink: 0;
  transition: opacity var(--transition-base);
}

.app-sidebar.collapsed .nav-item-label,
.app-sidebar.collapsed .nav-item-badge { display: none; }
.app-sidebar.collapsed .nav-item { justify-content: center; padding: var(--space-2); }
.app-sidebar.collapsed .sidebar-nav { padding: var(--space-3) var(--space-1); align-items: center; }
.app-sidebar.collapsed .nav-item.active::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 3px;
  height: 20px;
  background: var(--accent);
  border-radius: 0 2px 2px 0;
}

/* Active indicator (expanded) */
.nav-item.active::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 3px;
  height: 20px;
  background: var(--accent);
  border-radius: 0 2px 2px 0;
}

/* Keyboard shortcut hint */
.nav-shortcut {
  font-size: var(--text-xs);
  color: var(--text-muted);
  background: var(--bg-hover);
  padding: 1px 5px;
  border-radius: 3px;
  font-family: var(--font-mono);
  transition: opacity var(--transition-base);
}
.app-sidebar.collapsed .nav-shortcut { display: none; }

/* ── Sidebar Footer (User Profile) ──────────────────────── */
.sidebar-footer {
  flex-shrink: 0;
  border-top: 1px solid var(--border);
  padding: var(--space-3) var(--space-2);
}

.sidebar-user {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2) var(--space-2);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background var(--transition-fast);
  min-height: 48px;
}
.sidebar-user:hover { background: var(--bg-hover); }

.user-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  object-fit: cover;
  flex-shrink: 0;
  border: 2px solid var(--border);
}

.user-avatar-placeholder {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: var(--text-sm);
  font-weight: 700;
  flex-shrink: 0;
}

.user-info {
  flex: 1;
  min-width: 0;
  transition: opacity var(--transition-base);
}
.user-name { font-size: var(--text-sm); font-weight: 600; color: var(--text-primary); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.user-email { font-size: var(--text-xs); color: var(--text-muted); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.app-sidebar.collapsed .user-info { display: none; }
.app-sidebar.collapsed .sidebar-user { justify-content: center; padding: var(--space-2); }

/* Collapsed: footer buttons — icon only */
.app-sidebar.collapsed .btn-signout span,
.app-sidebar.collapsed #btn-install-pwa span {
  display: none;
}
.app-sidebar.collapsed .btn-signout,
.app-sidebar.collapsed #btn-install-pwa {
  justify-content: center;
  padding: var(--space-2);
}
.app-sidebar.collapsed .sidebar-footer {
  padding: var(--space-3) var(--space-1);
}

.btn-signout {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  width: 100%;
  padding: var(--space-2) var(--space-3);
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: var(--text-sm);
  cursor: pointer;
  border-radius: var(--radius-md);
  transition: background var(--transition-fast), color var(--transition-fast);
  margin-top: 2px;
  min-height: 36px;
}
.btn-signout:hover { background: var(--danger-light); color: var(--danger); }

/* ── Command Palette Trigger ─────────────────────────────── */
.sidebar-search-btn {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2) var(--space-3);
  margin: 0 var(--space-2) var(--space-2);
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text-muted);
  font-size: var(--text-sm);
  cursor: pointer;
  transition: border-color var(--transition-fast), background var(--transition-fast);
  min-height: 36px;
  flex-shrink: 0;
  width: calc(100% - var(--space-4));
}
.sidebar-search-btn:hover { border-color: var(--accent); background: var(--bg-hover); color: var(--text-secondary); }
.sidebar-search-shortcut {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  background: var(--bg-hover);
  padding: 1px 5px;
  border-radius: 3px;
  flex-shrink: 0;
}
.app-sidebar.collapsed .sidebar-search-btn { display: none; }

/* ── Collapsed sidebar: right-side tooltips (Discord/VS Code style) ── */
.app-sidebar.collapsed [data-tooltip]::after {
  bottom: auto;
  left: calc(100% + 8px);
  top: 50%;
  transform: translateY(-50%);
  white-space: nowrap;
}

.app-sidebar.collapsed .nav-item::after {
  content: attr(aria-label);
  position: absolute;
  left: calc(100% + 8px);
  top: 50%;
  transform: translateY(-50%);
  background: var(--bg-tertiary);
  color: var(--text-primary);
  font-size: var(--text-xs);
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  white-space: nowrap;
  pointer-events: none;
  opacity: 0;
  transition: opacity var(--transition-fast);
  z-index: var(--z-toast);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-md);
}
.app-sidebar.collapsed .nav-item:hover::after {
  opacity: 1;
}

/* ── Bottom Nav (Mobile) ─────────────────────────────────── */
#bottom-nav {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  min-height: calc(var(--bottom-nav-height) + var(--safe-bottom));
  background: var(--bg-darkest);
  border-top: 1px solid var(--border);
  z-index: var(--z-sidebar);
  padding: 0 max(var(--space-2), var(--safe-right)) var(--safe-bottom) max(var(--space-2), var(--safe-left));
}

.bottom-nav-items {
  display: flex;
  align-items: center;
  justify-content: space-around;
  min-height: var(--bottom-nav-height);
  width: 100%;
}

.bottom-nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 3px;
  flex: 1;
  min-height: 44px;
  border: none;
  background: none;
  color: var(--text-muted);
  cursor: pointer;
  border-radius: var(--radius-md);
  transition: color var(--transition-fast);
  touch-action: manipulation;
  padding: var(--space-1);
  position: relative;
}
.bottom-nav-item:hover,
.bottom-nav-item.active { color: var(--accent); }
.bottom-nav-item.active::before {
  content: '';
  position: absolute;
  top: 4px;
  width: 22px;
  height: 3px;
  border-radius: var(--radius-full);
  background: var(--accent);
}
.bottom-nav-item.active .bottom-nav-dot { opacity: 1; }

.bottom-nav-label {
  font-size: 10px;
  font-weight: 500;
  line-height: 1;
  white-space: nowrap;
}

.bottom-nav-dot {
  width: 4px;
  height: 4px;
  background: var(--accent);
  border-radius: 50%;
  opacity: 0;
  transition: opacity var(--transition-fast);
  position: absolute;
  bottom: 4px;
}

@media (max-width: 768px) {
  #bottom-nav { display: flex; }
}