/* 
 * AI聊天室管理后台样式
 * 深色主题 - 类似 Linear/Vercel 风格
 */

/* CSS Variables */
:root {
  --bg-primary: #0a0a0b;
  --bg-secondary: #111113;
  --bg-tertiary: #18181b;
  --bg-hover: #1f1f23;
  --bg-active: #27272a;
  
  --text-primary: #fafafa;
  --text-secondary: #a1a1aa;
  --text-muted: #71717a;
  
  --border-color: #27272a;
  --border-light: #3f3f46;
  
  --accent: #6366f1;
  --accent-hover: #818cf8;
  --accent-muted: rgba(99, 102, 241, 0.15);
  
  --success: #22c55e;
  --success-muted: rgba(34, 197, 94, 0.15);
  --warning: #f59e0b;
  --warning-muted: rgba(245, 158, 11, 0.15);
  --danger: #ef4444;
  --danger-muted: rgba(239, 68, 68, 0.15);
  
  --sidebar-width: 260px;
  --header-height: 64px;
  --radius: 8px;
  --radius-lg: 12px;
  
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: "SF Mono", Monaco, "Cascadia Code", monospace;
}

/* Reset */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 14px;
}

body {
  font-family: var(--font-sans);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  font-family: inherit;
  cursor: pointer;
}

input, textarea, select {
  font-family: inherit;
  font-size: inherit;
}

/* App Container */
.app-container {
  display: flex;
  min-height: 100vh;
}

/* Sidebar */
.sidebar {
  width: var(--sidebar-width);
  background: var(--bg-secondary);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: 100;
}

.sidebar-header {
  padding: 20px;
  border-bottom: 1px solid var(--border-color);
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
}

.logo-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--accent), #a855f7);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 12px;
  color: white;
}

.logo-text {
  font-size: 16px;
  font-weight: 600;
}

/* Navigation */
.sidebar-nav {
  flex: 1;
  padding: 16px 12px;
  overflow-y: auto;
}

.nav-group {
  margin-top: 24px;
}

.nav-group:first-child {
  margin-top: 0;
}

.nav-group-title {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-muted);
  padding: 0 12px;
  margin-bottom: 8px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  border-radius: var(--radius);
  color: var(--text-secondary);
  transition: all 0.15s ease;
  margin-bottom: 2px;
}

.nav-item:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

.nav-item.active {
  background: var(--accent-muted);
  color: var(--accent);
}

.nav-icon {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

/* Sidebar Footer */
.sidebar-footer {
  padding: 16px;
  border-top: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.admin-info {
  display: flex;
  align-items: center;
  gap: 10px;
}

.admin-avatar {
  width: 32px;
  height: 32px;
  background: linear-gradient(135deg, #6366f1, #a855f7);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: 12px;
  color: white;
}

.admin-details {
  display: flex;
  flex-direction: column;
}

.admin-name {
  font-size: 13px;
  font-weight: 500;
}

.admin-role {
  font-size: 11px;
  color: var(--text-muted);
}

.logout-btn {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius);
  color: var(--text-secondary);
  transition: all 0.15s ease;
}

.logout-btn:hover {
  background: var(--danger-muted);
  color: var(--danger);
}

.logout-btn svg {
  width: 18px;
  height: 18px;
}

/* Main Content */
.main-content {
  flex: 1;
  margin-left: var(--sidebar-width);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Page Header */
.page-header {
  height: var(--header-height);
  padding: 0 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-color);
  background: var(--bg-secondary);
  position: sticky;
  top: 0;
  z-index: 50;
}

.page-title {
  font-size: 18px;
  font-weight: 600;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* Page Content */
.page-content {
  flex: 1;
  padding: 32px;
}

/* Cards */
.card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.card-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.card-title {
  font-size: 14px;
  font-weight: 600;
}

.card-body {
  padding: 20px;
}

/* Stats Grid */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 20px;
  margin-bottom: 32px;
}

.stat-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 20px;
}

.stat-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

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

.stat-icon {
  width: 36px;
  height: 36px;
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
}

.stat-icon svg {
  width: 20px;
  height: 20px;
}

.stat-icon.blue {
  background: var(--accent-muted);
  color: var(--accent);
}

.stat-icon.green {
  background: var(--success-muted);
  color: var(--success);
}

.stat-icon.orange {
  background: var(--warning-muted);
  color: var(--warning);
}

.stat-icon.red {
  background: var(--danger-muted);
  color: var(--danger);
}

.stat-value {
  font-size: 28px;
  font-weight: 700;
  line-height: 1;
}

.stat-desc {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 6px;
}

/* Tables */
.table-container {
  overflow-x: auto;
}

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

.data-table th,
.data-table td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid var(--border-color);
}

.data-table th {
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-muted);
  background: var(--bg-tertiary);
}

.data-table tbody tr:hover {
  background: var(--bg-hover);
}

.data-table tbody tr:last-child td {
  border-bottom: none;
}

/* Avatar in table */
.table-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), #a855f7);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: 14px;
  color: white;
  flex-shrink: 0;
}

.table-avatar.character {
  background: linear-gradient(135deg, #f59e0b, #ef4444);
}

.table-avatar-img {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  object-fit: cover;
  flex-shrink: 0;
}

.table-user {
  display: flex;
  align-items: center;
  gap: 12px;
}

.table-user-info {
  display: flex;
  flex-direction: column;
}

.table-user-name {
  font-weight: 500;
}

.table-user-email {
  font-size: 12px;
  color: var(--text-muted);
}

/* Status Badge */
.status-badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  border-radius: 100px;
  font-size: 12px;
  font-weight: 500;
}

.status-badge.active {
  background: var(--success-muted);
  color: var(--success);
}

.status-badge.inactive {
  background: var(--danger-muted);
  color: var(--danger);
}

.status-badge.pending {
  background: var(--warning-muted);
  color: var(--warning);
}

/* Action Buttons */
.action-btns {
  display: flex;
  gap: 8px;
}

.action-btn {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: none;
  border-radius: var(--radius);
  background: transparent;
  color: var(--text-secondary);
  transition: all 0.15s ease;
}

.action-btn:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

.action-btn.danger:hover {
  background: var(--danger-muted);
  color: var(--danger);
}

.action-btn svg {
  width: 16px;
  height: 16px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 16px;
  border: none;
  border-radius: var(--radius);
  font-size: 13px;
  font-weight: 500;
  transition: all 0.15s ease;
}

.btn-primary {
  background: var(--accent);
  color: white;
}

.btn-primary:hover {
  background: var(--accent-hover);
}

.btn-secondary {
  background: var(--bg-tertiary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  background: var(--bg-hover);
  border-color: var(--border-light);
}

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

.btn-danger:hover {
  background: var(--danger);
  color: white;
}

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

.btn svg {
  width: 16px;
  height: 16px;
}

/* Forms */
.form-group {
  margin-bottom: 20px;
}

.form-label {
  display: block;
  font-size: 13px;
  font-weight: 500;
  margin-bottom: 8px;
  color: var(--text-secondary);
}

.form-control {
  width: 100%;
  padding: 10px 14px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  color: var(--text-primary);
  transition: all 0.15s ease;
}

.form-control:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-muted);
}

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

textarea.form-control {
  min-height: 120px;
  resize: vertical;
}

select.form-control {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%2371717a' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 40px;
}

.form-hint {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 6px;
}

.form-check {
  display: flex;
  align-items: center;
  gap: 10px;
}

.form-check input[type="checkbox"] {
  width: 18px;
  height: 18px;
  accent-color: var(--accent);
}

.form-row {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

/* Avatar Upload Area */
.avatar-upload-area {
  display: flex;
  align-items: flex-start;
  gap: 20px;
}

.avatar-preview {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: linear-gradient(135deg, #f59e0b, #ef4444);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  overflow: hidden;
  border: 3px solid var(--border-color);
}

.avatar-preview img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.avatar-preview .avatar-placeholder {
  font-size: 32px;
  font-weight: 700;
  color: white;
}

.avatar-input-group {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.avatar-actions {
  display: flex;
  gap: 8px;
  align-items: center;
}

.file-upload-btn {
  cursor: pointer;
}

.file-upload-btn .btn {
  pointer-events: none;
}

.file-name {
  font-size: 13px;
  color: var(--text-muted);
}

/* Alert */
.alert {
  padding: 14px 16px;
  border-radius: var(--radius);
  margin-bottom: 20px;
  font-size: 13px;
}

.alert-success {
  background: var(--success-muted);
  color: var(--success);
  border: 1px solid rgba(34, 197, 94, 0.3);
}

.alert-error {
  background: var(--danger-muted);
  color: var(--danger);
  border: 1px solid rgba(239, 68, 68, 0.3);
}

.alert-warning {
  background: var(--warning-muted);
  color: var(--warning);
  border: 1px solid rgba(245, 158, 11, 0.3);
}

/* Search & Filters */
.toolbar {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
}

.search-box {
  flex: 1;
  max-width: 320px;
  position: relative;
}

.search-box input {
  width: 100%;
  padding: 10px 14px 10px 40px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  color: var(--text-primary);
}

.search-box input:focus {
  outline: none;
  border-color: var(--accent);
}

.search-box svg {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  width: 16px;
  height: 16px;
  color: var(--text-muted);
}

.filter-select {
  min-width: 150px;
}

/* Pagination */
.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin-top: 24px;
}

.page-btn {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius);
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  transition: all 0.15s ease;
}

.page-btn:hover:not(.disabled) {
  background: var(--bg-hover);
  color: var(--text-primary);
}

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

.page-btn svg {
  width: 16px;
  height: 16px;
}

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

/* Empty State */
.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-muted);
}

.empty-state svg {
  width: 48px;
  height: 48px;
  margin-bottom: 16px;
  opacity: 0.5;
}

.empty-state h3 {
  font-size: 16px;
  font-weight: 500;
  margin-bottom: 8px;
  color: var(--text-secondary);
}

/* Login Page */
.login-container {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-primary);
}

.login-box {
  width: 100%;
  max-width: 400px;
  padding: 40px;
}

.login-logo {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin-bottom: 40px;
}

.login-logo .logo-icon {
  width: 48px;
  height: 48px;
  font-size: 16px;
}

.login-logo .logo-text {
  font-size: 24px;
}

.login-title {
  text-align: center;
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 8px;
}

.login-subtitle {
  text-align: center;
  color: var(--text-muted);
  margin-bottom: 32px;
}

.login-form .form-group {
  margin-bottom: 16px;
}

.login-form .btn {
  width: 100%;
  margin-top: 8px;
}

/* Detail Page */
.detail-header {
  display: flex;
  align-items: flex-start;
  gap: 24px;
  margin-bottom: 32px;
}

.detail-avatar-wrapper {
  flex-shrink: 0;
}

.detail-avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), #a855f7);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 32px;
  color: white;
  flex-shrink: 0;
}

.detail-avatar-img {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  object-fit: cover;
}

.detail-info h2 {
  font-size: 24px;
  font-weight: 600;
  margin-bottom: 8px;
}

.detail-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  color: var(--text-secondary);
  font-size: 13px;
}

.detail-meta-item {
  display: flex;
  align-items: center;
  gap: 6px;
}

.detail-meta-item svg {
  width: 16px;
  height: 16px;
}

/* Members List */
.members-list {
  display: grid;
  gap: 12px;
}

.member-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  background: var(--bg-tertiary);
  border-radius: var(--radius);
}

.member-info {
  display: flex;
  align-items: center;
  gap: 12px;
}

.member-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), #a855f7);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: 14px;
  color: white;
  flex-shrink: 0;
}

.member-avatar.character {
  background: linear-gradient(135deg, #f59e0b, #ef4444);
}

.member-avatar-img {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  object-fit: cover;
  flex-shrink: 0;
}

.member-name {
  font-weight: 500;
}

.member-role {
  font-size: 12px;
  color: var(--text-muted);
}

/* Messages */
.messages-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
  max-height: 500px;
  overflow-y: auto;
  padding: 16px;
  background: var(--bg-tertiary);
  border-radius: var(--radius);
}

.message-item {
  display: flex;
  gap: 12px;
}

.message-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), #a855f7);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: 12px;
  color: white;
  flex-shrink: 0;
}

.message-avatar.character {
  background: linear-gradient(135deg, #f59e0b, #ef4444);
}

.message-avatar-img {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  object-fit: cover;
  flex-shrink: 0;
}

.message-content {
  flex: 1;
}

.message-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 4px;
}

.message-sender {
  font-weight: 500;
  font-size: 13px;
}

.message-time {
  font-size: 11px;
  color: var(--text-muted);
}

.message-text {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* Error Page */
.error-container {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 20px;
}

.error-code {
  font-size: 120px;
  font-weight: 700;
  line-height: 1;
  background: linear-gradient(135deg, var(--accent), #a855f7);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.error-message {
  font-size: 18px;
  color: var(--text-secondary);
  margin-top: 16px;
}

.error-actions {
  margin-top: 32px;
}

/* Scrollbar */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--border-light);
}

/* Responsive */
@media (max-width: 1024px) {
  .sidebar {
    transform: translateX(-100%);
    transition: transform 0.3s ease;
  }
  
  .sidebar.open {
    transform: translateX(0);
  }
  
  .main-content {
    margin-left: 0;
  }
  
  .form-row {
    grid-template-columns: 1fr;
  }
}