/* ============================================================
   AI Chat - Main Stylesheet
   ============================================================ */

:root {
  --primary: #6366f1;
  --primary-hover: #4f46e5;
  --primary-light: #eef2ff;
  --success: #10b981;
  --danger: #ef4444;
  --warning: #f59e0b;
  --dark: #1e293b;
  --bg: #f8fafc;
  --surface: #ffffff;
  --border: #e2e8f0;
  --text: #1e293b;
  --text-secondary: #64748b;
  --text-muted: #94a3b8;
  --sidebar-bg: #1e293b;
  --sidebar-text: #cbd5e1;
  --sidebar-hover: #334155;
  --sidebar-active: #6366f1;
}

[data-theme="dark"] {
  --bg: #0f172a;
  --surface: #1e293b;
  --border: #334155;
  --text: #e2e8f0;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --sidebar-bg: #0f172a;
  --sidebar-text: #94a3b8;
  --sidebar-hover: #1e293b;
  --primary-light: #1e1b4b;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  overflow: hidden;
  height: 100vh;
}

a {
  color: var(--primary);
  text-decoration: none;
}

a:hover {
  color: var(--primary-hover);
}

/* ============================================================
   Sidebar
   ============================================================ */
.sidebar {
  position: fixed;
  left: 0;
  top: 0;
  height: 100vh;
  width: 280px;
  background: var(--sidebar-bg);
  color: var(--sidebar-text);
  display: flex;
  flex-direction: column;
  z-index: 100;
  transition: transform 0.3s ease;
}

.sidebar.collapsed {
  transform: translateX(-280px);
}

.sidebar-header {
  padding: 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}

.sidebar-logo {
  font-size: 18px;
  display: flex;
  align-items: center;
  gap: 8px;
  color: #fff;
}

.sidebar-logo i {
  color: var(--primary);
}

.sidebar-toggle {
  background: none;
  border: none;
  color: var(--sidebar-text);
  font-size: 18px;
  cursor: pointer;
  padding: 4px;
}

.sidebar-actions {
  padding: 12px 16px;
}

.btn-new-chat {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  font-size: 14px;
  width: 100%;
  transition: background 0.2s;
  text-decoration: none;
}

.btn-new-chat:hover {
  background: var(--primary-hover);
  color: #fff;
}

.sidebar-search {
  padding: 0 16px 12px;
  position: relative;
}

.sidebar-search input {
  width: 100%;
  padding: 8px 32px 8px 12px;
  background: var(--sidebar-hover);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 6px;
  color: #fff;
  font-size: 13px;
  outline: none;
}

.sidebar-search input::placeholder {
  color: var(--text-muted);
}

.sidebar-search .search-icon {
  position: absolute;
  right: 24px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  font-size: 12px;
}

.sidebar-history {
  flex: 1;
  overflow-y: auto;
  padding: 0 8px;
}

.sidebar-history::-webkit-scrollbar {
  width: 4px;
}

.sidebar-history::-webkit-scrollbar-thumb {
  background: var(--sidebar-hover);
  border-radius: 2px;
}

.history-item {
  display: flex;
  align-items: center;
  padding: 10px 12px;
  border-radius: 6px;
  cursor: pointer;
  transition: background 0.2s;
  margin-bottom: 2px;
  position: relative;
  gap: 8px;
}

.history-item:hover {
  background: var(--sidebar-hover);
}

.history-item.active {
  background: var(--sidebar-active);
  color: #fff;
}

.history-item i {
  font-size: 12px;
  opacity: 0.6;
  flex-shrink: 0;
}

.history-item .history-title {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 13px;
}

.history-item .history-actions {
  display: none;
  gap: 4px;
}

.history-item:hover .history-actions {
  display: flex;
}

.history-item .history-actions button {
  background: none;
  border: none;
  color: var(--sidebar-text);
  cursor: pointer;
  font-size: 12px;
  padding: 2px 4px;
  opacity: 0.6;
}

.history-item .history-actions button:hover {
  opacity: 1;
}

.sidebar-menu {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding: 8px;
}

.sidebar-menu-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: 6px;
  cursor: pointer;
  transition: background 0.2s;
  color: var(--sidebar-text);
  font-size: 13px;
  text-decoration: none;
}

.sidebar-menu-item:hover {
  background: var(--sidebar-hover);
  color: #fff;
}

.sidebar-menu-item i {
  width: 18px;
  text-align: center;
}

.history-loading {
  text-align: center;
  padding: 20px;
  color: var(--text-muted);
  font-size: 13px;
}

/* ============================================================
   Main Content
   ============================================================ */
.main-content {
  margin-left: 280px;
  height: 100vh;
  transition: margin-left 0.3s ease;
}

.main-content.expanded {
  margin-left: 0;
}

/* ============================================================
   Auth Pages
   ============================================================ */
.auth-container {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 20px;
  background: var(--bg);
}

.auth-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 40px;
  width: 100%;
  max-width: 420px;
  box-shadow: 0 4px 24px rgba(0,0,0,0.06);
}

.auth-header {
  text-align: center;
  margin-bottom: 32px;
}

.auth-icon {
  font-size: 48px;
  color: var(--primary);
  margin-bottom: 16px;
}

.auth-header h1 {
  font-size: 24px;
  margin-bottom: 4px;
}

.auth-header p {
  color: var(--text-secondary);
  font-size: 14px;
}

.auth-form {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.auth-footer {
  text-align: center;
  margin-top: 24px;
  font-size: 14px;
  color: var(--text-secondary);
}

/* ============================================================
   Forms
   ============================================================ */
.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-group label {
  font-size: 13px;
  font-weight: 600;
  color: var(--text);
}

.form-control {
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
  background: var(--surface);
  color: var(--text);
  transition: border-color 0.2s;
  outline: none;
  font-family: inherit;
}

.form-control:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-light);
}

.form-control::placeholder {
  color: var(--text-muted);
}

select.form-control {
  cursor: pointer;
  appearance: auto;
}

textarea.form-control {
  resize: vertical;
}

/* ============================================================
   Buttons
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 20px;
  border: none;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  text-decoration: none;
  font-family: inherit;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-primary {
  background: var(--primary);
  color: #fff;
}

.btn-primary:hover:not(:disabled) {
  background: var(--primary-hover);
}

.btn-success {
  background: var(--success);
  color: #fff;
}

.btn-success:hover {
  background: #059669;
}

.btn-danger {
  background: var(--danger);
  color: #fff;
}

.btn-danger:hover {
  background: #dc2626;
}

.btn-warning {
  background: var(--warning);
  color: #fff;
}

.btn-outline {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
}

.btn-outline:hover {
  background: var(--surface);
  border-color: var(--primary);
  color: var(--primary);
}

.btn-sm {
  padding: 6px 12px;
  font-size: 12px;
}

.btn-block {
  display: flex;
  width: 100%;
  justify-content: center;
}

.btn-icon {
  padding: 8px;
  border-radius: 6px;
  background: transparent;
  border: none;
  cursor: pointer;
  color: var(--text-secondary);
}

.btn-icon:hover {
  background: var(--border);
  color: var(--text);
}

/* ============================================================
   Alerts
   ============================================================ */
.alert {
  padding: 12px 16px;
  border-radius: 8px;
  font-size: 14px;
  margin-bottom: 16px;
}

.alert-error {
  background: #fef2f2;
  color: #991b1b;
  border: 1px solid #fecaca;
}

.alert-success {
  background: #f0fdf4;
  color: #166534;
  border: 1px solid #bbf7d0;
}

.alert-warning {
  background: #fffbeb;
  color: #92400e;
  border: 1px solid #fde68a;
}

/* ============================================================
   Modal
   ============================================================ */
.modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,0.5);
  z-index: 1000;
  align-items: center;
  justify-content: center;
}

.modal.show {
  display: flex;
}

.modal-content {
  background: var(--surface);
  border-radius: 16px;
  padding: 32px;
  width: 90%;
  max-width: 500px;
  position: relative;
  animation: modalIn 0.3s ease;
}

@keyframes modalIn {
  from { transform: scale(0.95); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
}

.modal-header h3 {
  font-size: 18px;
}

.modal-close {
  background: none;
  border: none;
  font-size: 24px;
  cursor: pointer;
  color: var(--text-secondary);
}

.modal-body p {
  margin-bottom: 12px;
  color: var(--text-secondary);
}

.modal-footer {
  display: flex;
  gap: 8px;
  justify-content: flex-end;
  margin-top: 20px;
}

/* ============================================================
   Tables (Admin)
   ============================================================ */
.table-container {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
}

table th,
table td {
  padding: 10px 14px;
  text-align: left;
  border-bottom: 1px solid var(--border);
  font-size: 13px;
}

table th {
  background: var(--bg);
  font-weight: 600;
  color: var(--text-secondary);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

table tr:hover {
  background: var(--primary-light);
}

/* ============================================================
   Admin Layout
   ============================================================ */
.admin-container {
  display: flex;
  min-height: 100vh;
}

.admin-sidebar {
  width: 240px;
  background: var(--dark);
  color: #fff;
  padding: 20px 0;
  flex-shrink: 0;
}

.admin-sidebar .admin-logo {
  padding: 0 20px 20px;
  font-size: 18px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
  margin-bottom: 12px;
}

.admin-nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 20px;
  color: var(--sidebar-text);
  text-decoration: none;
  font-size: 14px;
  transition: all 0.2s;
}

.admin-nav-item:hover,
.admin-nav-item.active {
  background: rgba(255,255,255,0.1);
  color: #fff;
}

.admin-content {
  flex: 1;
  padding: 24px;
  overflow-y: auto;
  background: var(--bg);
}

.admin-header {
  margin-bottom: 24px;
}

.admin-header h1 {
  font-size: 24px;
  margin-bottom: 4px;
}

.admin-header p {
  color: var(--text-secondary);
  font-size: 14px;
}

/* Dashboard Cards */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.stat-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
  display: flex;
  align-items: center;
  gap: 16px;
}

.stat-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
}

.stat-icon.purple { background: #eef2ff; color: #6366f1; }
.stat-icon.green { background: #f0fdf4; color: #10b981; }
.stat-icon.blue { background: #eff6ff; color: #3b82f6; }
.stat-icon.orange { background: #fff7ed; color: #f97316; }
.stat-icon.red { background: #fef2f2; color: #ef4444; }

.stat-info h3 {
  font-size: 24px;
  font-weight: 700;
}

.stat-info p {
  font-size: 13px;
  color: var(--text-secondary);
}

/* Status badges */
.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
}

.status-badge.online {
  background: #f0fdf4;
  color: #166534;
}

.status-badge.offline {
  background: #fef2f2;
  color: #991b1b;
}

.status-badge.unknown {
  background: #f8fafc;
  color: #64748b;
}

.status-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
}

.status-dot.online { background: #10b981; }
.status-dot.offline { background: #ef4444; }
.status-dot.unknown { background: #94a3b8; }

/* ============================================================
   Utilities
   ============================================================ */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-muted { color: var(--text-secondary); }
.mt-2 { margin-top: 8px; }
.mt-4 { margin-top: 16px; }
.mb-2 { margin-bottom: 8px; }
.mb-4 { margin-bottom: 16px; }
.flex { display: flex; }
.flex-1 { flex: 1; }
.gap-2 { gap: 8px; }
.gap-4 { gap: 16px; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 768px) {
  .sidebar {
    transform: translateX(-280px);
  }

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

  .main-content {
    margin-left: 0;
  }

  .admin-sidebar {
    width: 60px;
    overflow: hidden;
  }

  .admin-sidebar .admin-logo span,
  .admin-nav-item span {
    display: none;
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .auth-card {
    padding: 24px;
  }
}

.sidebar-toggle-btn {
  display: none;
  background: none;
  border: none;
  color: var(--text);
  font-size: 20px;
  cursor: pointer;
}

@media (max-width: 768px) {
  .sidebar-toggle-btn {
    display: block;
  }
}