/* ==================== 基础样式 ==================== */
:root {
  --primary: #6366f1;
  --primary-dark: #4f46e5;
  --primary-light: #818cf8;
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-400: #9ca3af;
  --gray-500: #6b7280;
  --gray-600: #4b5563;
  --gray-700: #374151;
  --gray-800: #1f2937;
  --gray-900: #111827;
  --radius: 12px;
  --shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background: var(--gray-50);
  color: var(--gray-800);
  line-height: 1.6;
  min-height: 100vh;
}

/* ==================== 用户页面样式 ==================== */
.user-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  padding: 20px;
}

.user-card {
  background: white;
  border-radius: 20px;
  box-shadow: 0 25px 50px -12px rgb(0 0 0 / 0.25);
  padding: 48px 40px;
  width: 100%;
  max-width: 420px;
  animation: slideUp 0.5s ease;
}

@keyframes slideUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

.user-card h1 {
  font-size: 28px;
  font-weight: 700;
  text-align: center;
  color: var(--gray-800);
  margin-bottom: 8px;
}

.user-card .subtitle {
  text-align: center;
  color: var(--gray-500);
  margin-bottom: 32px;
  font-size: 15px;
}

/* ==================== 表单样式 ==================== */
.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-weight: 500;
  color: var(--gray-700);
  margin-bottom: 8px;
  font-size: 14px;
}

.form-input {
  width: 100%;
  padding: 14px 16px;
  border: 2px solid var(--gray-200);
  border-radius: 10px;
  font-size: 15px;
  transition: all 0.2s;
  background: var(--gray-50);
}

.form-input:focus {
  outline: none;
  border-color: var(--primary);
  background: white;
  box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.1);
}

.form-input::placeholder {
  color: var(--gray-400);
}

/* ==================== 按钮样式 ==================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 20px;
  border: none;
  border-radius: 10px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  text-decoration: none;
}

.btn-primary {
  background: var(--primary);
  color: white;
  width: 100%;
  padding: 16px;
  font-size: 16px;
}

.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.4);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-primary:disabled {
  background: var(--gray-300);
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

.btn-secondary {
  background: var(--gray-100);
  color: var(--gray-700);
}

.btn-secondary:hover {
  background: var(--gray-200);
}

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

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

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

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

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

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

.btn-text-danger {
  background: transparent;
  color: var(--gray-500);
  border: none;
}

.btn-text-danger:hover {
  background: rgba(239, 68, 68, 0.1);
  color: var(--danger);
}

.btn.btn-sm {
  padding: 8px 16px;
  font-size: 13px;
  border-radius: 8px !important;
}

.btn-danger.btn-sm {
  padding: 8px 16px;
}

.btn-icon {
  padding: 8px;
  border-radius: 8px;
  background: transparent;
  color: var(--gray-500);
}

.btn-icon:hover {
  background: var(--gray-100);
  color: var(--gray-700);
}

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

.toast {
  padding: 16px 20px;
  border-radius: 12px;
  box-shadow: var(--shadow-lg);
  animation: slideIn 0.3s ease;
  max-width: 400px;
  display: flex;
  align-items: flex-start;
  gap: 12px;
}

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

.toast-success {
  background: #ecfdf5;
  border: 1px solid #a7f3d0;
  color: #065f46;
}

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

.toast-info {
  background: #eff6ff;
  border: 1px solid #bfdbfe;
  color: #1e40af;
}

.toast-icon {
  font-size: 20px;
  flex-shrink: 0;
}

.toast-content {
  flex: 1;
}

.toast-title {
  font-weight: 600;
  margin-bottom: 4px;
}

.toast-message {
  font-size: 14px;
  line-height: 1.5;
}

/* ==================== 管理后台样式 ==================== */
.admin-layout {
  min-height: 100vh;
  background: var(--gray-50);
}

.admin-header {
  background: white;
  border-bottom: 1px solid var(--gray-200);
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 100;
}

.admin-logo {
  font-size: 20px;
  font-weight: 700;
  color: var(--gray-800);
  display: flex;
  align-items: center;
  gap: 10px;
}

.admin-logo-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 18px;
}

.admin-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 24px;
}

/* ==================== 标签页 ==================== */
.tabs {
  display: flex;
  gap: 4px;
  background: var(--gray-100);
  padding: 4px;
  border-radius: 12px;
  margin-bottom: 24px;
  overflow-x: auto;
}

.tab {
  padding: 10px 20px;
  border: none;
  background: transparent;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 500;
  color: var(--gray-600);
  cursor: pointer;
  transition: all 0.2s;
  white-space: nowrap;
}

.tab:hover {
  color: var(--gray-800);
}

.tab.active {
  background: white;
  color: var(--primary);
  box-shadow: var(--shadow);
}

.tab-content {
  display: none;
  animation: fadeIn 0.3s ease;
}

.tab-content.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* ==================== 卡片样式 ==================== */
.card {
  background: white;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.card-header {
  padding: 20px 24px;
  border-bottom: 1px solid var(--gray-100);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.card-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--gray-800);
}

.card-body {
  padding: 24px;
}

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

.stat-card {
  background: white;
  border-radius: var(--radius);
  padding: 20px 24px;
  box-shadow: var(--shadow);
}

.stat-label {
  font-size: 13px;
  color: var(--gray-500);
  margin-bottom: 8px;
}

.stat-value {
  font-size: 28px;
  font-weight: 700;
  color: var(--gray-800);
}

.stat-value.primary { color: var(--primary); }
.stat-value.success { color: var(--success); }
.stat-value.warning { color: var(--warning); }
.stat-value.danger { color: var(--danger); }

/* ==================== 表格样式 ==================== */
.table-container {
  overflow-x: auto;
}

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

.table th,
.table td {
  padding: 14px 16px;
  text-align: left;
  border-bottom: 1px solid var(--gray-100);
}

.table th {
  background: var(--gray-50);
  font-weight: 600;
  font-size: 13px;
  color: var(--gray-600);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.table td {
  font-size: 14px;
  color: var(--gray-700);
}

.table tr:hover td {
  background: var(--gray-50);
}

.table-actions {
  display: flex;
  gap: 8px;
}

/* ==================== 状态标签 ==================== */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 500;
}

.badge-success {
  background: #d1fae5;
  color: #065f46;
}

.badge-danger {
  background: #fee2e2;
  color: #991b1b;
}

.badge-warning {
  background: #fef3c7;
  color: #92400e;
}

.badge-info {
  background: #dbeafe;
  color: #1e40af;
}

.badge-gray {
  background: var(--gray-100);
  color: var(--gray-600);
}

/* ==================== 代码样式 ==================== */
.code {
  font-family: 'SF Mono', Monaco, Consolas, monospace;
  background: var(--gray-100);
  padding: 4px 8px;
  border-radius: 6px;
  font-size: 13px;
  color: var(--gray-700);
  word-break: break-all;
}

/* ==================== 工具栏 ==================== */
.toolbar {
  display: flex;
  gap: 12px;
  margin-bottom: 20px;
  flex-wrap: wrap;
  align-items: center;
}

.toolbar-group {
  display: flex;
  gap: 8px;
  align-items: center;
}

/* ==================== 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;
  animation: fadeIn 0.2s ease;
}

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

.modal {
  background: white;
  border-radius: 16px;
  box-shadow: 0 25px 50px -12px rgb(0 0 0 / 0.25);
  width: 100%;
  max-width: 500px;
  max-height: 90vh;
  overflow: hidden;
  animation: modalSlide 0.3s ease;
}

@keyframes modalSlide {
  from { opacity: 0; transform: scale(0.95) translateY(-20px); }
  to { opacity: 1; transform: scale(1) translateY(0); }
}

.modal-header {
  padding: 20px 24px;
  border-bottom: 1px solid var(--gray-100);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

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

.modal-close {
  width: 28px;
  height: 28px;
  border: none;
  background: transparent;
  border-radius: 6px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--gray-400);
  font-size: 18px;
  font-weight: 300;
  transition: all 0.2s;
}

.modal-close:hover {
  background: var(--gray-100);
  color: var(--gray-600);
}

.modal-body {
  padding: 24px;
  overflow-y: auto;
  max-height: calc(90vh - 140px);
}

.modal-footer {
  padding: 16px 24px;
  border-top: 1px solid var(--gray-100);
  display: flex;
  gap: 12px;
  justify-content: flex-end;
}

.modal-footer .btn {
  width: auto;
  padding: 10px 20px;
  font-size: 14px;
}

/* ==================== 空状态 ==================== */
.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: var(--gray-500);
}

.empty-icon {
  font-size: 48px;
  margin-bottom: 16px;
  opacity: 0.5;
}

.empty-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--gray-700);
  margin-bottom: 8px;
}

.empty-desc {
  font-size: 14px;
}

/* ==================== 加载状态 ==================== */
.loading {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 2px solid var(--gray-200);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.btn .loading {
  width: 16px;
  height: 16px;
  border-width: 2px;
  border-color: rgba(255,255,255,0.3);
  border-top-color: white;
}

/* ==================== 输入框组 ==================== */
.input-group {
  display: flex;
  gap: 8px;
  align-items: center;
}

.input-group .form-input {
  width: auto;
}

.input-sm {
  padding: 8px 12px;
  font-size: 14px;
}

/* ==================== 开关 ==================== */
.switch {
  position: relative;
  width: 44px;
  height: 24px;
}

.switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.switch-slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--gray-300);
  border-radius: 24px;
  transition: 0.3s;
}

.switch-slider:before {
  position: absolute;
  content: "";
  height: 18px;
  width: 18px;
  left: 3px;
  bottom: 3px;
  background: white;
  border-radius: 50%;
  transition: 0.3s;
  box-shadow: 0 1px 3px rgba(0,0,0,0.2);
}

.switch input:checked + .switch-slider {
  background: var(--primary);
}

.switch input:checked + .switch-slider:before {
  transform: translateX(20px);
}

/* ==================== 响应式 ==================== */
@media (max-width: 768px) {
  .user-card {
    padding: 32px 24px;
  }

  .admin-container {
    padding: 16px;
  }

  .tabs {
    padding: 3px;
  }

  .tab {
    padding: 8px 14px;
    font-size: 13px;
  }

  .card-header {
    flex-direction: column;
    gap: 12px;
    align-items: flex-start;
  }

  .toolbar {
    flex-direction: column;
    align-items: stretch;
  }

  .toolbar-group {
    justify-content: space-between;
  }
}