:root {
  --primary: #6366f1;
  --primary-dark: #4f46e5;
  --primary-light: #818cf8;
  --bg: #f0f2f5;
  --bg-card: #ffffff;
  --bg-sidebar: #1e1e2e;
  --bg-sidebar-hover: #2a2a3e;
  --text: #1f2937;
  --text-light: #6b7280;
  --text-sidebar: #cdd6f4;
  --text-sidebar-active: #89b4fa;
  --border: #e5e7eb;
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  --info: #3b82f6;
  --radius: 10px;
  --shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

/* ============ 登录/注册页 ============ */
.auth-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  padding: 20px;
}

.auth-card {
  background: var(--bg-card);
  border-radius: 16px;
  box-shadow: var(--shadow-lg);
  padding: 40px;
  width: 100%;
  max-width: 420px;
}

.auth-card h1 {
  text-align: center;
  font-size: 28px;
  margin-bottom: 8px;
  background: linear-gradient(135deg, var(--primary), #764ba2);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.auth-card .subtitle {
  text-align: center;
  color: var(--text-light);
  margin-bottom: 32px;
  font-size: 14px;
}

.auth-tabs {
  display: flex;
  margin-bottom: 24px;
  border-bottom: 2px solid var(--border);
}

.auth-tab {
  flex: 1;
  padding: 10px;
  text-align: center;
  cursor: pointer;
  color: var(--text-light);
  font-weight: 500;
  transition: all 0.2s;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
}

.auth-tab.active {
  color: var(--primary);
  border-bottom-color: var(--primary);
}

.auth-form {
  display: none;
}

.auth-form.active {
  display: block;
}

.form-group {
  margin-bottom: 18px;
}

.form-group label {
  display: block;
  margin-bottom: 6px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text);
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 14px;
  transition: border-color 0.2s;
  outline: none;
  background: var(--bg-card);
  color: var(--text);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 10px 20px;
  border: none;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
  text-decoration: none;
  white-space: nowrap;
}

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

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

.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-warning:hover {
  background: #d97706;
}

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

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

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

.btn-block {
  width: 100%;
}

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

/* ============ Dashboard 布局 ============ */
.dashboard {
  display: flex;
  min-height: 100vh;
}

.sidebar {
  width: 240px;
  background: var(--bg-sidebar);
  color: var(--text-sidebar);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: 100;
  overflow-y: auto;
}

.sidebar-header {
  padding: 20px;
  text-align: center;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.sidebar-header h2 {
  font-size: 18px;
  color: #fff;
  margin-bottom: 4px;
}

.sidebar-header p {
  font-size: 12px;
  color: var(--text-light);
  opacity: 0.7;
}

.sidebar-nav {
  flex: 1;
  padding: 12px 0;
}

.sidebar-nav a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 20px;
  color: var(--text-sidebar);
  text-decoration: none;
  font-size: 14px;
  transition: all 0.2s;
  border-left: 3px solid transparent;
}

.sidebar-nav a:hover {
  background: var(--bg-sidebar-hover);
}

.sidebar-nav a.active {
  background: var(--bg-sidebar-hover);
  border-left-color: var(--text-sidebar-active);
  color: var(--text-sidebar-active);
}

.sidebar-nav .nav-icon {
  font-size: 18px;
  width: 20px;
  text-align: center;
}

.sidebar-nav .nav-section {
  padding: 12px 20px 4px;
  font-size: 11px;
  text-transform: uppercase;
  color: var(--text-light);
  opacity: 0.5;
  letter-spacing: 1px;
}

.sidebar-footer {
  padding: 16px 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.sidebar-user {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
}

.sidebar-user-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 600;
  font-size: 14px;
}

.sidebar-user-info {
  flex: 1;
  min-width: 0;
}

.sidebar-user-info .name {
  font-size: 13px;
  color: #fff;
  font-weight: 500;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.sidebar-user-info .role {
  font-size: 11px;
  color: var(--text-light);
  opacity: 0.7;
}

.main-content {
  flex: 1;
  margin-left: 240px;
  padding: 24px;
  min-width: 0;
}

.page-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
}

.page-header h1 {
  font-size: 24px;
}

/* ============ 卡片 ============ */
.card {
  background: var(--bg-card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 20px;
  margin-bottom: 20px;
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
}

.card-header h3 {
  font-size: 16px;
  font-weight: 600;
}

.card-body {
  padding: 0;
}

/* ============ 统计卡片 ============ */
stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

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

.stat-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  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: 22px;
  color: #fff;
}

.stat-icon.purple { background: var(--primary); }
.stat-icon.green { background: var(--success); }
.stat-icon.orange { background: var(--warning); }
.stat-icon.blue { background: var(--info); }
.stat-icon.red { background: var(--danger); }

.stat-info .label {
  font-size: 12px;
  color: var(--text-light);
  margin-bottom: 4px;
}

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

/* ============ 表格 ============ */
table {
  width: 100%;
  border-collapse: collapse;
}

table th {
  text-align: left;
  padding: 12px;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-light);
  text-transform: uppercase;
  border-bottom: 2px solid var(--border);
}

table td {
  padding: 12px;
  font-size: 14px;
  border-bottom: 1px solid var(--border);
}

table tr:hover {
  background: #f9fafb;
}

/* ============ 徽章 ============ */
.badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 500;
}

.badge-success { background: #d1fae5; color: #065f46; }
.badge-warning { background: #fef3c7; color: #92400e; }
.badge-danger { background: #fee2e2; color: #991b1b; }
.badge-info { background: #dbeafe; color: #1e40af; }
.badge-gray { background: #f3f4f6; color: #374151; }
.badge-purple { background: #ede9fe; color: #5b21b6; }

/* ============ 模态框 ============ */
.modal-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 1000;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.modal-overlay.active {
  display: flex;
}

.modal {
  background: var(--bg-card);
  border-radius: 16px;
  box-shadow: var(--shadow-lg);
  width: 100%;
  max-width: 560px;
  max-height: 90vh;
  overflow-y: auto;
}

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

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

.modal-close {
  background: none;
  border: none;
  font-size: 24px;
  cursor: pointer;
  color: var(--text-light);
  padding: 0;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  transition: all 0.2s;
}

.modal-close:hover {
  background: #f3f4f6;
}

.modal-body {
  padding: 20px;
}

.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  padding: 16px 20px;
  border-top: 1px solid var(--border);
}

/* ============ 日志 ============ */
.log-container {
  background: #1a1a2e;
  border-radius: var(--radius);
  padding: 16px;
  max-height: 400px;
  overflow-y: auto;
  font-family: "SF Mono", "Fira Code", "Consolas", monospace;
  font-size: 13px;
}

.log-line {
  padding: 2px 0;
  color: #a9b1d6;
  white-space: pre-wrap;
  word-break: break-all;
}

.log-line.info { color: #89b4fa; }
.log-line.warn { color: #f9e2af; }
.log-line.error { color: #f38ba8; }
.log-line .timestamp { color: #6c7086; margin-right: 8px; }

/* ============ Toast ============ */
.toast-container {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.toast {
  background: var(--bg-card);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  padding: 14px 20px;
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 280px;
  max-width: 400px;
  animation: slideIn 0.3s ease;
  border-left: 4px solid var(--info);
}

.toast.success { border-left-color: var(--success); }
.toast.error { border-left-color: var(--danger); }
.toast.warning { border-left-color: var(--warning); }

.toast .toast-icon {
  font-size: 20px;
}

.toast.success .toast-icon { color: var(--success); }
.toast.error .toast-icon { color: var(--danger); }
.toast.warning .toast-icon { color: var(--warning); }

.toast .toast-msg {
  flex: 1;
  font-size: 14px;
}

@keyframes slideIn {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

/* ============ 工具类 ============ */
.flex { display: flex; }
.flex-between { display: flex; justify-content: space-between; align-items: center; }
.gap-8 { gap: 8px; }
.gap-12 { gap: 12px; }
.gap-16 { gap: 16px; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.mb-16 { margin-bottom: 16px; }
.text-center { text-align: center; }
.text-sm { font-size: 13px; }
.text-light { color: var(--text-light); }
.text-success { color: var(--success); }
.text-danger { color: var(--danger); }
.text-warning { color: var(--warning); }
.text-info { color: var(--info); }
.mono { font-family: "SF Mono", "Fira Code", "Consolas", monospace; }
.hidden { display: none !important; }
.cursor-pointer { cursor: pointer; }

.empty-state {
  text-align: center;
  padding: 48px 20px;
  color: var(--text-light);
}

.empty-state .icon {
  font-size: 48px;
  margin-bottom: 16px;
  opacity: 0.3;
}

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

/* ============ 响应式 ============ */
@media (max-width: 768px) {
  .sidebar {
    transform: translateX(-100%);
    transition: transform 0.3s;
  }
  .sidebar.open {
    transform: translateX(0);
  }
  .main-content {
    margin-left: 0;
    padding: 16px;
  }
  .mobile-menu-btn {
    display: block !important;
  }
}

.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  font-size: 24px;
  cursor: pointer;
  color: var(--text);
  padding: 4px;
}

/* 复选框样式 */
input[type="checkbox"] {
  width: 16px;
  height: 16px;
  cursor: pointer;
}

/* 链接列表 */
.link-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.link-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 14px;
  background: #f9fafb;
  border-radius: var(--radius);
  border: 1px solid var(--border);
}

.link-item .copy-btn {
  background: none;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 4px 10px;
  font-size: 12px;
  cursor: pointer;
  color: var(--text-light);
  transition: all 0.2s;
}

.link-item .copy-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
}

textarea {
  resize: vertical;
  min-height: 80px;
  font-family: inherit;
}