/* EWS - 电商套图批量生成系统 */
:root {
  --primary: #4f46e5; --primary-hover: #4338ca; --primary-light: #eef2ff;
  --success: #10b981; --warning: #f59e0b; --danger: #ef4444; --info: #3b82f6;
  --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; --radius-lg: 12px;
  --shadow: 0 1px 3px rgba(0,0,0,0.1); --shadow-lg: 0 4px 12px rgba(0,0,0,0.1);
  --transition: 0.2s ease;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  background: var(--gray-50); color: var(--gray-800); line-height: 1.6; min-height: 100vh;
}
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }
.app-container { max-width: 1200px; margin: 0 auto; padding: 0 20px 80px; }

/* 导航 */
.navbar { background: white; border-bottom: 1px solid var(--gray-200); padding: 0 20px; position: sticky; top: 0; z-index: 100; box-shadow: var(--shadow); }
.navbar-inner { max-width: 1200px; margin: 0 auto; display: flex; align-items: center; justify-content: space-between; height: 60px; gap: 16px; }
.navbar-brand { font-size: 20px; font-weight: 700; color: var(--primary); display: flex; align-items: center; gap: 8px; }
.navbar-brand:hover { text-decoration: none; }
.navbar-nav { display: flex; gap: 4px; flex: 1; }
.nav-link { padding: 8px 16px; border-radius: var(--radius); color: var(--gray-600); font-size: 14px; font-weight: 500; transition: background var(--transition), color var(--transition); white-space: nowrap; }
.nav-link:hover { background: var(--gray-100); color: var(--gray-900); text-decoration: none; }
.nav-link.active { background: var(--primary-light); color: var(--primary); }
.navbar-right { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
.nav-credits { font-size: 13px; color: var(--gray-500); white-space: nowrap; }
.nav-credits b { color: var(--primary); }
.nav-refresh { font-size: 12px; color: var(--primary); cursor: pointer; margin-left: 8px; text-decoration: none; }
.nav-refresh:hover { text-decoration: underline; }

/* 页面 */
.page-header { display: flex; justify-content: space-between; align-items: center; margin: 32px 0 24px; }
.page-title { font-size: 24px; font-weight: 700; color: var(--gray-900); }
.action-bar { display: flex; gap: 8px; flex-wrap: wrap; }

/* 按钮 */
.btn { display: inline-flex; align-items: center; gap: 6px; padding: 10px 20px; border: none; border-radius: var(--radius); font-size: 14px; font-weight: 500; cursor: pointer; transition: all var(--transition); text-decoration: none; line-height: 1.4; }
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn-primary { background: var(--primary); color: white; }
.btn-primary:hover { background: var(--primary-hover); }
.btn-success { background: var(--success); color: white; }
.btn-danger { background: var(--danger); color: white; }
.btn-outline { background: white; color: var(--gray-700); border: 1px solid var(--gray-300); }
.btn-outline:hover { background: var(--gray-50); border-color: var(--gray-400); }
.btn-sm { padding: 6px 12px; font-size: 13px; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }

/* 表单 */
.form-group { margin-bottom: 20px; }
.form-label { display: block; font-size: 14px; font-weight: 600; color: var(--gray-700); margin-bottom: 6px; }
.form-label .required { color: var(--danger); margin-left: 2px; }
.form-label .optional { color: var(--gray-400); font-weight: 400; font-size: 12px; }
.form-input, .form-select, .form-textarea {
  width: 100%; padding: 10px 14px; border: 1px solid var(--gray-300); border-radius: var(--radius);
  font-size: 14px; color: var(--gray-800); background: white; transition: border-color var(--transition), box-shadow var(--transition); font-family: inherit;
}
.form-input:focus, .form-select:focus, .form-textarea:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(79,70,229,0.1); }
.form-textarea { resize: vertical; min-height: 80px; }
.form-hint { font-size: 12px; color: var(--gray-400); margin-top: 4px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
@media (max-width: 768px) { .form-row { grid-template-columns: 1fr; } }

/* 卡片 */
.card { background: white; border: 1px solid var(--gray-200); border-radius: var(--radius-lg); box-shadow: var(--shadow); }
.card-header { padding: 16px 20px; border-bottom: 1px solid var(--gray-200); font-weight: 600; font-size: 16px; color: var(--gray-800); }
.card-body { padding: 20px; }
.card + .card { margin-top: 20px; }

/* 表格 */
.table-container { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 12px 16px; border-bottom: 1px solid var(--gray-200); font-size: 14px; }
th { background: var(--gray-50); font-weight: 600; color: var(--gray-600); white-space: nowrap; }
tr:hover td { background: var(--gray-50); }

/* 徽章 */
.badge { display: inline-block; padding: 3px 10px; border-radius: 999px; font-size: 12px; font-weight: 500; white-space: nowrap; }
.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-default { background: var(--gray-200); color: var(--gray-600); }

/* Toast */
.toast { position: fixed; top: 20px; right: 20px; padding: 14px 20px; border-radius: var(--radius); color: white; font-size: 14px; font-weight: 500; box-shadow: var(--shadow-lg); z-index: 1000; opacity: 0; transform: translateX(100%); transition: all 0.3s ease; max-width: 400px; }
.toast.show { opacity: 1; transform: translateX(0); }
.toast-success { background: var(--success); }
.toast-error { background: var(--danger); }
.toast-warning { background: var(--warning); }
.toast-info { background: var(--info); }

/* 模态框 */
.modal-overlay { position: fixed; inset: 0; background: rgba(0,0,0,0.5); display: flex; align-items: center; justify-content: center; z-index: 200; opacity: 0; visibility: hidden; transition: all 0.2s; }
.modal-overlay.show { opacity: 1; visibility: visible; }
.modal { background: white; border-radius: var(--radius-lg); width: 90%; max-width: 560px; max-height: 85vh; overflow-y: auto; box-shadow: 0 20px 60px rgba(0,0,0,0.3); }
.modal-header { padding: 20px; border-bottom: 1px solid var(--gray-200); display: flex; justify-content: space-between; align-items: center; }
.modal-title { font-size: 18px; font-weight: 600; }
.modal-close { background: none; border: none; font-size: 24px; cursor: pointer; color: var(--gray-400); padding: 4px; line-height: 1; }
.modal-close:hover { color: var(--gray-700); }
.modal-body { padding: 20px; }
.modal-footer { padding: 16px 20px; border-top: 1px solid var(--gray-200); display: flex; justify-content: flex-end; gap: 8px; }
.detail-section { margin-bottom: 24px; }
.detail-section:last-child { margin-bottom: 0; }
.detail-label { font-size: 13px; color: var(--gray-500); margin-bottom: 4px; }
.detail-value { font-size: 14px; color: var(--gray-800); }

/* 上传 */
.upload-zone { border: 2px dashed var(--gray-300); border-radius: var(--radius); padding: 32px; text-align: center; cursor: pointer; transition: all var(--transition); background: var(--gray-50); display: flex; align-items: center; justify-content: center; min-height: 100px; }
.upload-zone:hover { border-color: var(--primary); background: var(--primary-light); }
.upload-zone.has-image { border-style: solid; border-color: var(--success); padding: 12px; }
.upload-zone img { max-width: 100%; max-height: 200px; border-radius: var(--radius); }

/* 变体 */
.variant-item { background: var(--gray-50); border: 1px solid var(--gray-200); border-radius: var(--radius); padding: 16px; margin-bottom: 12px; }
.variant-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 12px; }
.variant-number { font-weight: 600; font-size: 14px; color: var(--gray-700); }
.variant-remove { background: none; border: none; color: var(--danger); cursor: pointer; font-size: 13px; padding: 4px 8px; border-radius: var(--radius); }
.variant-remove:hover { background: #fee2e2; }

/* 空状态 */
.empty-state { text-align: center; padding: 60px 20px; color: var(--gray-400); }
.empty-state .empty-text { font-size: 16px; }

/* 加载 */
.loading { display: flex; justify-content: center; align-items: center; padding: 40px; color: var(--gray-400); }
.spinner { width: 24px; height: 24px; border: 3px solid var(--gray-200); border-top-color: var(--primary); border-radius: 50%; animation: spin 0.8s linear infinite; margin-right: 8px; }
@keyframes spin { to { transform: rotate(360deg); } }

/* 登录 */
.login-card { background: white; border-radius: var(--radius-lg); padding: 40px; width: 400px; max-width: 90vw; box-shadow: 0 20px 60px rgba(0,0,0,0.3); }
.login-title { font-size: 24px; font-weight: 700; text-align: center; margin-bottom: 8px; color: var(--gray-900); }
.login-subtitle { text-align: center; color: var(--gray-500); margin-bottom: 32px; font-size: 14px; }

/* Tab */
.tab-bar { display: flex; gap: 0; border-bottom: 2px solid var(--gray-200); margin-bottom: 24px; }
.tab-btn { padding: 10px 20px; font-size: 14px; font-weight: 500; cursor: pointer; border: none; background: none; color: var(--gray-500); border-bottom: 2px solid transparent; margin-bottom: -2px; }
.tab-btn.active { color: var(--primary); border-bottom-color: var(--primary); }
.tab-panel { display: none; }
.tab-panel.active { display: block; }

/* 响应式 */
@media (max-width: 640px) {
  .navbar-inner { gap: 8px; }
  .navbar-brand { font-size: 16px; }
  .nav-link { padding: 6px 10px; font-size: 13px; }
  .page-header { flex-direction: column; align-items: flex-start; gap: 12px; }
  .action-bar { flex-wrap: wrap; }
  .login-card { padding: 24px; }
}