/* ─── 基础重置与变量 ─── */
:root {
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --primary-light: #eff6ff;
  --success: #16a34a;
  --warning: #d97706;
  --danger: #dc2626;
  --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: 8px;
  --shadow: 0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.06);
  --shadow-lg: 0 4px 12px rgba(0,0,0,0.1);
  --transition: 150ms ease;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  color: var(--gray-900);
  background: var(--gray-50);
  line-height: 1.6;
  min-height: 100vh;
}

/* ─── 登录页 ─── */
.login-page {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.login-card {
  background: white;
  padding: 48px 40px;
  border-radius: 16px;
  box-shadow: var(--shadow-lg);
  width: 100%;
  max-width: 420px;
  text-align: center;
}

.login-card h1 {
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 4px;
  color: var(--gray-900);
}

.login-card .subtitle {
  color: var(--gray-500);
  margin-bottom: 32px;
  font-size: 14px;
}

.login-card .logo-icon {
  font-size: 48px;
  margin-bottom: 16px;
}

.login-card input {
  width: 100%;
  padding: 12px 16px;
  border: 2px solid var(--gray-200);
  border-radius: var(--radius);
  font-size: 15px;
  transition: border-color var(--transition);
  outline: none;
  font-family: 'SF Mono', 'Fira Code', monospace;
}

.login-card input:focus {
  border-color: var(--primary);
}

.login-card .error-msg {
  color: var(--danger);
  font-size: 13px;
  margin-top: 8px;
  min-height: 20px;
}

/* ─── 布局 ─── */
.app-layout {
  display: flex;
  min-height: 100vh;
}

/* ─── 侧边栏 ─── */
.sidebar {
  width: 240px;
  background: white;
  border-right: 1px solid var(--gray-200);
  padding: 24px 0;
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  left: 0;
  height: 100vh;
  z-index: 100;
}

.sidebar-brand {
  padding: 0 20px 24px;
  font-size: 20px;
  font-weight: 700;
  color: var(--gray-900);
  border-bottom: 1px solid var(--gray-100);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.sidebar-nav {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 8px 12px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: var(--radius);
  color: var(--gray-600);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition);
  border: none;
  background: none;
  width: 100%;
  text-align: left;
}

.nav-item:hover {
  background: var(--gray-100);
  color: var(--gray-800);
}

.nav-item.active {
  background: var(--primary-light);
  color: var(--primary);
  font-weight: 600;
}

.nav-item .nav-icon {
  font-size: 18px;
  width: 24px;
  text-align: center;
}

.sidebar-footer {
  padding: 16px 20px;
  border-top: 1px solid var(--gray-100);
}

.logout-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border-radius: var(--radius);
  color: var(--gray-500);
  cursor: pointer;
  font-size: 13px;
  border: none;
  background: none;
  width: 100%;
  transition: color var(--transition);
}

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

/* ─── 主内容区 ─── */
.main-content {
  margin-left: 240px;
  flex: 1;
  padding: 32px;
  max-width: 960px;
}

.page-title {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 24px;
  color: var(--gray-900);
}

/* ─── 统计卡片 ─── */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin-bottom: 32px;
}

.stat-card {
  background: white;
  padding: 24px;
  border-radius: var(--radius);
  border: 1px solid var(--gray-200);
  transition: box-shadow var(--transition);
}

.stat-card:hover {
  box-shadow: var(--shadow);
}

.stat-card .stat-label {
  font-size: 13px;
  color: var(--gray-500);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.stat-card .stat-value {
  font-size: 32px;
  font-weight: 700;
  margin-top: 4px;
  color: var(--gray-900);
}

.stat-card .stat-icon {
  font-size: 24px;
  margin-bottom: 8px;
}

/* ─── 用户信息卡片 ─── */
.info-card {
  background: white;
  border-radius: var(--radius);
  border: 1px solid var(--gray-200);
  padding: 24px;
  margin-bottom: 24px;
}

.info-card h3 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 16px;
  color: var(--gray-800);
}

.info-row {
  display: flex;
  padding: 10px 0;
  border-bottom: 1px solid var(--gray-100);
  font-size: 14px;
}

.info-row:last-child {
  border-bottom: none;
}

.info-row .info-label {
  width: 120px;
  color: var(--gray-500);
  flex-shrink: 0;
}

.info-row .info-value {
  color: var(--gray-800);
  word-break: break-all;
}

.info-row .info-value.code {
  font-family: 'SF Mono', 'Fira Code', monospace;
  font-size: 13px;
  background: var(--gray-100);
  padding: 2px 8px;
  border-radius: 4px;
}

.copy-btn {
  margin-left: 8px;
  padding: 2px 8px;
  font-size: 12px;
  border: 1px solid var(--gray-200);
  border-radius: 4px;
  background: white;
  cursor: pointer;
  color: var(--gray-500);
  transition: all var(--transition);
}

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

/* ─── 账号列表 ─── */
.account-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.account-item {
  background: white;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 16px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.account-item {
  gap: 12px;
}

.btn-icon {
  background: none;
  border: 1px solid var(--gray-200);
  border-radius: 6px;
  padding: 4px 8px;
  cursor: pointer;
  font-size: 14px;
  line-height: 1;
  transition: all 0.2s;
  color: var(--gray-500);
}

.btn-icon:hover {
  background: var(--gray-100);
  border-color: var(--gray-300);
  color: var(--gray-700);
}

.btn-icon:disabled {
  cursor: not-allowed;
}

.account-item .app-id {
  font-family: 'SF Mono', 'Fira Code', monospace;
  font-size: 14px;
  font-weight: 500;
}

.account-item .status-badge {
  font-size: 12px;
  padding: 2px 8px;
  border-radius: 12px;
  font-weight: 500;
}

.status-badge.active {
  background: #dcfce7;
  color: var(--success);
}

/* ─── 表单 ─── */
.form-card {
  background: white;
  border-radius: var(--radius);
  border: 1px solid var(--gray-200);
  padding: 24px;
  margin-bottom: 24px;
}

.form-card h3 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 16px;
}

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

.form-group label {
  display: block;
  font-size: 13px;
  font-weight: 500;
  color: var(--gray-600);
  margin-bottom: 6px;
}

.form-group input {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  font-size: 14px;
  outline: none;
  transition: border-color var(--transition);
}

.form-group input:focus {
  border-color: var(--primary);
}

/* ─── 按钮 ─── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 20px;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  border: none;
  transition: all var(--transition);
}

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

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

.btn-primary:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.btn-secondary {
  background: var(--gray-100);
  color: var(--gray-700);
  border: 1px solid var(--gray-200);
}

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

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

/* ─── 表格 ─── */
.table-container {
  background: white;
  border-radius: var(--radius);
  border: 1px solid var(--gray-200);
  overflow: hidden;
}

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

th {
  text-align: left;
  padding: 12px 16px;
  font-size: 12px;
  font-weight: 600;
  color: var(--gray-500);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  background: var(--gray-50);
  border-bottom: 1px solid var(--gray-200);
}

td {
  padding: 12px 16px;
  font-size: 14px;
  border-bottom: 1px solid var(--gray-100);
  color: var(--gray-700);
}

tr:last-child td {
  border-bottom: none;
}

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

/* ─── 状态标签 ─── */
.tag {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 12px;
  font-size: 12px;
  font-weight: 500;
}

.tag-created {
  background: #dbeafe;
  color: #1d4ed8;
}

.tag-updated {
  background: #fef3c7;
  color: #92400e;
}

.tag-deleted {
  background: #fee2e2;
  color: #991b1b;
}

/* ─── 空状态 ─── */
.empty-state {
  text-align: center;
  padding: 48px 24px;
  color: var(--gray-400);
}

.empty-state .empty-icon {
  font-size: 48px;
  margin-bottom: 12px;
}

.empty-state .empty-text {
  font-size: 15px;
}

/* ─── 加载状态 ─── */
.loading {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 48px;
  color: var(--gray-400);
}

.spinner {
  width: 20px;
  height: 20px;
  border: 2px solid var(--gray-200);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
  margin-right: 8px;
}

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

/* ─── 消息提示 ─── */
.toast {
  position: fixed;
  top: 16px;
  right: 16px;
  padding: 12px 20px;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 500;
  box-shadow: var(--shadow-lg);
  z-index: 999;
  animation: slideIn 0.3s ease;
  max-width: 360px;
}

.toast-success {
  background: #dcfce7;
  color: var(--success);
  border: 1px solid #bbf7d0;
}

.toast-error {
  background: #fee2e2;
  color: var(--danger);
  border: 1px solid #fecaca;
}

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

/* ─── Toast 淡出 ─── */
.toast.fade-out {
  animation: slideOut 0.3s ease forwards;
}

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

/* ─── 响应式 ─── */
@media (max-width: 768px) {
  .sidebar {
    width: 100%;
    height: auto;
    position: relative;
    padding: 12px 0;
    border-right: none;
    border-bottom: 1px solid var(--gray-200);
  }

  .sidebar-nav {
    flex-direction: row;
    overflow-x: auto;
    padding: 4px 12px;
  }

  .nav-item {
    white-space: nowrap;
    font-size: 13px;
    padding: 8px 12px;
  }

  .sidebar-footer {
    display: none;
  }

  .main-content {
    margin-left: 0;
    padding: 16px;
  }

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