/* ═══════════════════════════════════════════════════════════
   layout.css — App Layout (Sidebar + Main Chat Area)
   ═══════════════════════════════════════════════════════════ */

.app-container {
  display: flex;
  height: 100vh;
  width: 100vw;
  overflow: hidden;
}

/* ── Sidebar ── */
.sidebar {
  width: var(--sidebar-width);
  min-width: var(--sidebar-width);
  height: 100vh;
  background: var(--glass-bg-strong);
  backdrop-filter: var(--glass-blur);
  border-left: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  transition: width var(--transition-base), min-width var(--transition-base);
  z-index: 100;
  overflow: visible; /* to allow the floating toggle button to overflow the border */
  position: relative;
}

.sidebar.collapsed {
  width: var(--sidebar-collapsed) !important;
  min-width: var(--sidebar-collapsed) !important;
}

.sidebar-header {
  padding: var(--space-4) var(--space-5);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
}

.sidebar-logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.sidebar-logo h1 {
  font-size: var(--text-xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
  letter-spacing: -0.02em;
}

.sidebar-logo .logo-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-primary);
  animation: pulse-glow 2s ease-in-out infinite;
}

.btn-new-chat {
  width: calc(100% - var(--space-8));
  padding: var(--space-3) var(--space-4);
  margin: var(--space-4);
  background: var(--color-primary);
  color: white;
  border-radius: var(--radius-md);
  font-weight: var(--font-weight-medium);
  font-size: var(--text-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  transition: all var(--transition-fast);
  box-sizing: border-box;
  border: none;
}
.btn-new-chat:hover {
  background: var(--color-primary-light);
  box-shadow: var(--shadow-glow);
}

.sidebar-search {
  padding: 0 var(--space-4);
  margin-bottom: var(--space-2);
}

.sidebar-search input {
  width: 100%;
  padding: var(--space-2) var(--space-3);
  background: var(--color-bg-input);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text-primary);
  font-size: var(--text-sm);
  transition: border-color var(--transition-fast);
  box-sizing: border-box;
}
.sidebar-search input:focus {
  border-color: var(--color-primary);
  outline: none;
}
.sidebar-search input::placeholder {
  color: var(--color-text-muted);
}

.chat-list {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-2) var(--space-3);
}

.chat-item {
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-sm);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
  transition: background-color var(--transition-fast);
  margin-bottom: var(--space-1);
}
.chat-item:hover {
  background: var(--color-bg-hover);
}
.chat-item.active {
  background: var(--color-primary-subtle);
  border-right: 3px solid var(--color-primary);
}

.chat-item-title {
  font-size: var(--text-sm);
  color: var(--color-text-primary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  flex: 1;
}

.chat-item-actions {
  display: flex;
  gap: var(--space-1);
  opacity: 0;
  transition: opacity var(--transition-fast);
}
.chat-item:hover .chat-item-actions {
  opacity: 1;
}

.chat-item-btn {
  padding: var(--space-1);
  border-radius: var(--radius-sm);
  color: var(--color-text-muted);
  font-size: var(--text-xs);
  transition: all var(--transition-fast);
}
.chat-item-btn:hover {
  background: var(--color-bg-hover);
  color: var(--color-text-primary);
}
.chat-item-btn.delete:hover {
  color: var(--color-error);
}

/* Sidebar footer */
.sidebar-footer {
  padding: var(--space-3) var(--space-4);
  border-top: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.user-info {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}

.user-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: var(--font-weight-bold);
  font-size: var(--text-sm);
  overflow: hidden;
}
.user-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.btn-admin, .btn-logout {
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
  color: var(--color-text-muted);
  font-size: var(--text-xs);
  transition: all var(--transition-fast);
}
.btn-admin:hover { color: var(--color-primary); }
.btn-logout:hover { color: var(--color-error); }

/* ── Main Content Area ── */
.main-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  height: 100vh;
  background: var(--color-bg-chat);
  position: relative;
}

.main-header {
  padding: var(--space-3) var(--space-6);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  z-index: 10;
}

.btn-toggle-sidebar {
  padding: var(--space-2);
  border-radius: var(--radius-sm);
  color: var(--color-text-secondary);
  transition: all var(--transition-fast);
  font-size: var(--text-lg);
}
.btn-toggle-sidebar:hover {
  background: var(--color-bg-hover);
  color: var(--color-text-primary);
}

/* Mode Toggle */
.mode-toggle {
  display: flex;
  background: var(--color-bg-card);
  border-radius: var(--radius-full);
  padding: 3px;
  border: 1px solid var(--color-border);
}

.mode-btn {
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-secondary);
  transition: all var(--transition-fast);
}
.mode-btn.active {
  background: var(--color-primary);
  color: white;
}

/* Model Selector Custom Dropdown */
.model-selector {
  position: relative;
  display: flex;
  align-items: center;
}

.custom-dropdown-container {
  position: relative;
  display: inline-block;
  direction: ltr;
}

.custom-dropdown-trigger {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-2) var(--space-4);
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-md);
  color: var(--color-text-primary);
  font-family: var(--font-family);
  font-size: var(--text-sm);
  font-weight: var(--font-weight-medium);
  cursor: pointer;
  transition: all var(--transition-fast);
  min-width: 230px;
  box-shadow: var(--shadow-sm);
}

.custom-dropdown-trigger:hover {
  background: var(--color-bg-hover);
  border-color: var(--color-primary);
  box-shadow: var(--shadow-glow);
}

.custom-dropdown-trigger .trigger-content {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.custom-dropdown-trigger .trigger-label {
  color: var(--color-text-muted);
  font-size: var(--text-xs);
}

.custom-dropdown-trigger .trigger-value {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-text-primary);
}

.custom-dropdown-trigger .provider-icon {
  font-size: var(--text-xs);
  color: var(--color-primary);
  opacity: 0.8;
}

.custom-dropdown-trigger .trigger-chevron {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  transition: transform var(--transition-fast);
}

.custom-dropdown-container.open .trigger-chevron {
  transform: rotate(180deg);
}

.custom-dropdown-menu {
  position: absolute;
  top: calc(100% + 6px);
  left: 0;
  right: auto;
  background: var(--glass-bg-strong);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-lg);
  padding: var(--space-2) 0;
  width: max-content;
  min-width: 100%;
  max-width: 380px;
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.6);
  z-index: 1000;
  display: none;
  opacity: 0;
  transform: translateY(-8px);
  transition: opacity 0.15s ease, transform 0.15s ease;
}

.custom-dropdown-container.open .custom-dropdown-menu {
  display: block;
  opacity: 1;
  transform: translateY(0);
}

.dropdown-group-header {
  padding: var(--space-3) var(--space-4) var(--space-1) var(--space-4);
  font-size: 10px;
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  display: flex;
  align-items: center;
  gap: var(--space-2);
  border-bottom: 1px solid rgba(255, 255, 255, 0.03);
  margin-bottom: var(--space-1);
}

.dropdown-group-header i {
  font-size: 10px;
  opacity: 0.8;
}

.dropdown-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-2) var(--space-4);
  color: var(--color-text-secondary);
  font-size: var(--text-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
  text-align: left;
}

.dropdown-item:hover {
  background: rgba(255, 255, 255, 0.04);
  color: var(--color-text-primary);
}

.dropdown-item.active {
  background: rgba(220, 38, 38, 0.08);
  color: var(--color-primary-light);
  font-weight: var(--font-weight-medium);
}

.dropdown-item .item-left {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  min-width: 0;
}

.dropdown-item .item-details {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.dropdown-item .item-name {
  white-space: nowrap;
}

.ollama-img-icon {
  width: 15px;
  height: 15px;
  object-fit: contain;
  vertical-align: middle;
  filter: brightness(0) invert(1);
}

.dropdown-item .item-meta {
  font-size: 10px;
  color: var(--color-text-muted);
  margin-top: 2px;
}

.dropdown-item .provider-icon {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  width: 16px;
  text-align: center;
}

.dropdown-item.active .provider-icon {
  color: var(--color-primary);
}

.dropdown-item .active-check {
  font-size: var(--text-xs);
  color: var(--color-primary);
}

/* ── Sidebar Collapsed States & Sub-Elements ── */

/* Floating Edge Toggle Button */
.btn-sidebar-toggle {
  position: absolute;
  left: 0;
  top: 50%;
  transform: translate(-50%, -50%);
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border-strong);
  color: var(--color-text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 101;
  transition: all var(--transition-fast);
  box-shadow: var(--shadow-sm);
}

.btn-sidebar-toggle:hover {
  background: var(--color-primary);
  color: white;
  border-color: var(--color-primary);
  box-shadow: var(--shadow-glow);
}

/* Rotate Chevron 180deg when collapsed */
.sidebar.collapsed .btn-sidebar-toggle i {
  transform: rotate(180deg);
}

/* Sidebar Logo & Header in Collapsed */
.sidebar.collapsed .sidebar-header {
  justify-content: center;
  padding: var(--space-4) 0;
}
.sidebar.collapsed .sidebar-logo h1 {
  display: none !important;
}

/* New Chat Button in Collapsed */
.sidebar.collapsed .btn-new-chat {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  margin: var(--space-4) auto;
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}
.sidebar.collapsed .btn-new-chat span {
  display: none !important;
}
.sidebar.collapsed .btn-new-chat i {
  font-size: var(--text-lg);
  margin: 0;
}

/* Search Bar in Collapsed */
.sidebar-search {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}
.sidebar-search .search-icon {
  position: absolute;
  right: var(--space-6);
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  pointer-events: none;
}
.sidebar-search input {
  padding-right: var(--space-8) !important; /* Padding on right for search icon in RTL */
}
.sidebar.collapsed .sidebar-search {
  padding: 0;
  margin-bottom: var(--space-4);
}
.sidebar.collapsed .sidebar-search input {
  display: none !important;
}
.sidebar.collapsed .sidebar-search .search-icon {
  position: static;
  font-size: var(--text-lg);
  pointer-events: auto;
  cursor: pointer;
}

/* Chat list and items in Collapsed */
.chat-item-icon {
  font-size: var(--text-base);
  color: var(--color-text-secondary);
  transition: color var(--transition-fast);
  flex-shrink: 0;
  width: 20px;
  text-align: center;
}
.chat-item:hover .chat-item-icon,
.chat-item.active .chat-item-icon {
  color: var(--color-primary);
}

/* ── Empty Chats State ── */
.empty-chats-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-8) var(--space-4);
  color: var(--color-text-muted);
  text-align: center;
  opacity: 0.6;
  transition: all var(--transition-base);
}
.empty-chats-icon {
  font-size: var(--text-2xl);
  color: var(--color-primary);
  opacity: 0.8;
  margin-bottom: var(--space-1);
}
.empty-chats-text {
  font-size: var(--text-xs);
  font-weight: var(--font-weight-regular);
}
.sidebar.collapsed .empty-chats-state {
  padding: var(--space-6) 0;
}
.sidebar.collapsed .empty-chats-text {
  display: none !important;
}

.sidebar.collapsed .chat-list {
  padding: var(--space-2) var(--space-1);
}
.sidebar.collapsed .chat-item {
  justify-content: center;
  padding: var(--space-3) 0;
}
.sidebar.collapsed .chat-item-title,
.sidebar.collapsed .chat-item-actions {
  display: none !important;
}

/* Footer / Theme Toggle in Collapsed */
.footer-actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}
.btn-theme-toggle {
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
  color: var(--color-text-muted);
  font-size: var(--text-base);
  transition: all var(--transition-fast);
  cursor: pointer;
}
.btn-theme-toggle:hover {
  color: var(--color-primary);
}

.sidebar.collapsed .sidebar-footer {
  flex-direction: column;
  gap: var(--space-4);
  padding: var(--space-4) 0;
  align-items: center;
}
.sidebar.collapsed .user-info {
  justify-content: center;
}
.sidebar.collapsed .user-info span,
.sidebar.collapsed .badge-admin {
  display: none !important;
}
.sidebar.collapsed .footer-actions {
  flex-direction: column;
  gap: var(--space-3);
  width: 100%;
}

/* Desktop Header Toggle Button Hide */
@media (min-width: 769px) {
  .btn-toggle-sidebar {
    display: none !important;
  }
}

/* ── Responsive ── */
@media (max-width: 768px) {
  .sidebar {
    position: fixed;
    right: 0;
    top: 0;
    z-index: 200;
    transition: right var(--transition-base), transform var(--transition-base);
  }
  .sidebar.collapsed {
    right: auto !important;
    transform: translateX(100%);
    width: var(--sidebar-width) !important;
    min-width: var(--sidebar-width) !important;
  }
  .btn-sidebar-toggle {
    display: none !important; /* Hide floating edge toggle on mobile drawer view */
  }
  
  /* Model Selector Dropdown Responsiveness on Mobile */
  .custom-dropdown-trigger {
    min-width: auto !important;
    max-width: 160px;
    padding: var(--space-2) var(--space-3) !important;
    gap: var(--space-2) !important;
  }
  .custom-dropdown-trigger .trigger-label {
    display: none !important;
  }
  .custom-dropdown-trigger .trigger-value span {
    max-width: 85px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }
  .custom-dropdown-menu {
    width: 250px !important;
  }
}