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

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

/* ── Main Content Area ── */
.main-content {
  flex: 1;
  min-width: 0;          /* never let wide content push the page sideways */
  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);
}

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

/* ── Responsive ── */
@media (max-width: 768px) {
  /* 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;
  }
  /* phones: compact top bar (menu · mode switch · model icon) */
  .main-header { padding: 8px 12px; gap: 8px; }
  .mode-btn { padding: 6px 12px; font-size: 0.8rem; }
  .custom-dropdown-trigger .trigger-value span { display: none; }
  .custom-dropdown-trigger { max-width: 72px; }
}