/* ===== 全局样式 ===== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --primary: #4F46E5;
  --primary-dark: #4338CA;
  --success: #10B981;
  --warning: #F59E0B;
  --danger: #EF4444;
  --bg: #F9FAFB;
  --card: #FFFFFF;
  --text: #1F2937;
  --text-light: #6B7280;
  --border: #E5E7EB;
  --shadow: 0 1px 3px rgba(0,0,0,0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1);
}

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

/* ===== 登录页面 ===== */
.login-container {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--primary) 0%, #7C3AED 100%);
}

.login-box {
  background: var(--card);
  padding: 3rem;
  border-radius: 1rem;
  box-shadow: var(--shadow-lg);
  width: 100%;
  max-width: 400px;
  margin: 1rem;
}

.login-box h1 {
  text-align: center;
  margin-bottom: 2rem;
  color: var(--primary);
}

.login-box .icon {
  text-align: center;
  font-size: 3rem;
  margin-bottom: 1rem;
}

/* ===== 后台布局 ===== */
.admin-layout {
  display: flex;
  min-height: 100vh;
}

/* 侧边栏 */
.sidebar {
  width: 260px;
  background: var(--card);
  border-right: 1px solid var(--border);
  position: fixed;
  height: 100vh;
  overflow-y: auto;
  z-index: 100;
}

.sidebar-header {
  padding: 1.5rem;
  border-bottom: 1px solid var(--border);
}

.sidebar-header h2 {
  font-size: 1.25rem;
  color: var(--primary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.sidebar-nav {
  padding: 1rem 0;
}

.nav-item {
  display: flex;
  align-items: center;
  padding: 0.875rem 1.5rem;
  color: var(--text-light);
  cursor: pointer;
  transition: all 0.2s;
  border-left: 3px solid transparent;
}

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

.nav-item.active {
  background: #EEF2FF;
  color: var(--primary);
  border-left-color: var(--primary);
}

.nav-item .icon {
  width: 20px;
  margin-right: 0.75rem;
}

/* 主内容区 */
.main-content {
  flex: 1;
  margin-left: 260px;
  padding: 2rem;
}

.page {
  display: none;
}

.page.active {
  display: block;
}

/* ===== 卡片组件 ===== */
.card {
  background: var(--card);
  border-radius: 0.75rem;
  box-shadow: var(--shadow);
  padding: 1.5rem;
  margin-bottom: 1.5rem;
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border);
}

.card-title {
  font-size: 1.125rem;
  font-weight: 600;
}

/* ===== 统计卡片 ===== */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.stat-card {
  background: var(--card);
  border-radius: 0.75rem;
  padding: 1.5rem;
  box-shadow: var(--shadow);
}

.stat-card .icon {
  width: 48px;
  height: 48px;
  border-radius: 0.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 1rem;
}

.stat-card .icon.blue { background: #DBEAFE; color: #2563EB; }
.stat-card .icon.green { background: #D1FAE5; color: #059669; }
.stat-card .icon.orange { background: #FEF3C7; color: #D97706; }
.stat-card .icon.red { background: #FEE2E2; color: #DC2626; }

.stat-card .value {
  font-size: 2rem;
  font-weight: 700;
  color: var(--text);
}

.stat-card .label {
  color: var(--text-light);
  font-size: 0.875rem;
}

/* ===== 表单组件 ===== */
.form-group {
  margin-bottom: 1.25rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 500;
  color: var(--text);
}

.form-control {
  width: 100%;
  padding: 0.625rem 0.875rem;
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  font-size: 0.9375rem;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.form-control:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

select.form-control {
  cursor: pointer;
}

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.625rem 1.25rem;
  border: none;
  border-radius: 0.5rem;
  font-size: 0.9375rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
  gap: 0.5rem;
}

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

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

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

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

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

.btn-group {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

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

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

th, td {
  padding: 0.875rem 1rem;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

th {
  font-weight: 600;
  color: var(--text-light);
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

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

/* ===== 标签 ===== */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.75rem;
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 500;
}

.badge-success {
  background: #D1FAE5;
  color: #059669;
}

.badge-warning {
  background: #FEF3C7;
  color: #D97706;
}

.badge-danger {
  background: #FEE2E2;
  color: #DC2626;
}

.badge-info {
  background: #DBEAFE;
  color: #2563EB;
}

/* ===== 搜索和筛选 ===== */
.toolbar {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 1.5rem;
  align-items: center;
}

.search-box {
  flex: 1;
  min-width: 200px;
  position: relative;
}

.search-box input {
  padding-left: 2.5rem;
}

.search-box .icon {
  position: absolute;
  left: 0.875rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-light);
}

.filter-group {
  display: flex;
  gap: 0.5rem;
}

/* ===== 卡密列表展示 ===== */
.license-list {
  max-height: 300px;
  overflow-y: auto;
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  margin-top: 1rem;
}

.license-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border);
  font-family: 'Monaco', 'Consolas', monospace;
  font-size: 0.875rem;
}

.license-item:last-child {
  border-bottom: none;
}

.license-item:hover {
  background: var(--bg);
}

.copy-btn {
  padding: 0.25rem 0.5rem;
  font-size: 0.75rem;
}

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

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

.modal {
  background: var(--card);
  border-radius: 1rem;
  padding: 2rem;
  max-width: 500px;
  width: 90%;
  max-height: 90vh;
  overflow-y: auto;
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
}

.modal-close {
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--text-light);
}

.modal-close:hover {
  color: var(--text);
}

/* ===== API文档 ===== */
.api-endpoint {
  background: var(--bg);
  border-radius: 0.5rem;
  padding: 1rem;
  margin-bottom: 1rem;
}

.api-method {
  display: inline-block;
  padding: 0.25rem 0.5rem;
  border-radius: 0.25rem;
  font-size: 0.75rem;
  font-weight: 600;
  margin-right: 0.5rem;
}

.api-method.post {
  background: #D1FAE5;
  color: #059669;
}

.api-method.get {
  background: #DBEAFE;
  color: #2563EB;
}

.api-url {
  font-family: 'Monaco', 'Consolas', monospace;
  font-size: 0.875rem;
  color: var(--text);
}

.api-code {
  background: #1F2937;
  color: #E5E7EB;
  border-radius: 0.5rem;
  padding: 1rem;
  font-family: 'Monaco', 'Consolas', monospace;
  font-size: 0.8125rem;
  overflow-x: auto;
  margin-top: 0.75rem;
}

.api-code pre {
  margin: 0;
}

/* ===== 提示信息 ===== */
.toast {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  padding: 1rem 1.5rem;
  border-radius: 0.5rem;
  color: white;
  font-weight: 500;
  z-index: 2000;
  animation: slideIn 0.3s ease;
}

.toast.success {
  background: var(--success);
}

.toast.error {
  background: var(--danger);
}

.toast.warning {
  background: var(--warning);
}

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

/* ===== 响应式 ===== */
@media (max-width: 768px) {
  .sidebar {
    width: 100%;
    position: relative;
    height: auto;
  }
  
  .main-content {
    margin-left: 0;
  }
  
  .admin-layout {
    flex-direction: column;
  }
  
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ===== 辅助类 ===== */
.text-center { text-align: center; }
.text-right { text-align: right; }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.hidden { display: none !important; }

/* ===== API文档标签页 ===== */
.api-tabs {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
  border-bottom: 2px solid var(--border);
  padding-bottom: 0;
}

.api-tab {
  padding: 0.75rem 1.25rem;
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  color: var(--text-light);
  font-size: 0.9375rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
  margin-bottom: -2px;
}

.api-tab:hover {
  color: var(--primary);
}

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

.api-tab-content {
  display: none;
}

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

/* API详情折叠面板 */
.api-detail {
  background: var(--bg);
  border-radius: 0.5rem;
  margin-bottom: 0.75rem;
  border-left: 3px solid var(--primary);
}

.api-detail summary {
  padding: 1rem;
  cursor: pointer;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  list-style: none;
}

.api-detail summary::-webkit-details-marker {
  display: none;
}

.api-detail summary::before {
  content: '▶';
  font-size: 0.75rem;
  transition: transform 0.2s;
}

.api-detail[open] summary::before {
  transform: rotate(90deg);
}

.api-detail .api-code {
  margin: 0;
  border-top-left-radius: 0;
  border-top-right-radius: 0;
}

/* 移动端适配 */
@media (max-width: 768px) {
  .api-tabs {
    overflow-x: auto;
    flex-wrap: nowrap;
    -webkit-overflow-scrolling: touch;
  }
  
  .api-tab {
    white-space: nowrap;
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
  }
}