/* CustomerRefund Web UI - 完整样式 */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
:root {
  --primary: #1a73e8;
  --primary-hover: #1557b0;
  --danger: #d93025;
  --success: #188038;
  --warning: #f9ab00;
  --bg: #f8f9fa;
  --card: #fff;
  --border: #dadce0;
  --text: #202124;
  --text-secondary: #5f6368;
  --sidebar: #1e1e2d;
  --sidebar-text: #a2a3b7;
  --sidebar-active: #1a73e8;
}
body { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; background: var(--bg); color: var(--text); }
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ===== Login ===== */
.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; border-radius: 12px; padding: 40px; width: 400px; box-shadow: 0 20px 60px rgba(0,0,0,0.3); }
.login-card h1 { text-align: center; margin-bottom: 30px; font-size: 24px; color: #333; }
.login-card .form-group { margin-bottom: 20px; }
.login-card label { display: block; margin-bottom: 6px; color: #666; font-size: 14px; }
.login-card input { width: 100%; padding: 12px 16px; border: 1px solid var(--border); border-radius: 8px; font-size: 15px; outline: none; }
.login-card input:focus { border-color: var(--primary); box-shadow: 0 0 0 2px rgba(26,115,232,0.2); }
.login-card .error { color: var(--danger); font-size: 14px; margin-top: 10px; text-align: center; }
.login-card button { width: 100%; padding: 12px; background: var(--primary); color: white; border: none; border-radius: 8px; font-size: 16px; cursor: pointer; }
.login-card button:hover { background: var(--primary-hover); }
.login-card button:disabled { opacity: 0.6; cursor: not-allowed; }

/* ===== Layout ===== */
.app-layout { display: flex; min-height: 100vh; }
.sidebar { width: 240px; background: var(--sidebar); color: var(--sidebar-text); padding: 20px 0; flex-shrink: 0; }
.sidebar-header { padding: 0 20px 20px; border-bottom: 1px solid rgba(255,255,255,0.1); margin-bottom: 10px; }
.sidebar-header h2 { font-size: 18px; color: white; }
.sidebar-header .user-info { font-size: 12px; margin-top: 5px; opacity: 0.7; }
.sidebar-nav { list-style: none; }
.sidebar-nav li a { display: flex; align-items: center; padding: 12px 20px; color: var(--sidebar-text); text-decoration: none; font-size: 14px; transition: all 0.2s; }
.sidebar-nav li a:hover { background: rgba(255,255,255,0.05); color: white; }
.sidebar-nav li a.active { background: rgba(26,115,232,0.15); color: var(--sidebar-active); border-right: 3px solid var(--sidebar-active); }
.sidebar-nav li a .icon { margin-right: 10px; font-size: 18px; width: 24px; text-align: center; }
.main-content { flex: 1; padding: 24px; overflow-y: auto; }
.page-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 24px; }
.page-header h1 { font-size: 22px; }
.header-actions { display: flex; gap: 10px; }

/* ===== Buttons ===== */
.btn { display: inline-flex; align-items: center; gap: 6px; padding: 8px 16px; border: none; border-radius: 6px; font-size: 14px; cursor: pointer; transition: all 0.2s; }
.btn-primary { background: var(--primary); color: white; }
.btn-primary:hover { background: var(--primary-hover); }
.btn-danger { background: var(--danger); color: white; }
.btn-danger:hover { background: #c5221f; }
.btn-success { background: var(--success); color: white; }
.btn-success:hover { background: #137333; }
.btn-outline { background: transparent; color: var(--text); border: 1px solid var(--border); }
.btn-outline:hover { background: var(--bg); }
.btn-sm { padding: 4px 10px; font-size: 12px; }
.btn-block { display: block; width: 100%; text-align: center; }

/* ===== Cards ===== */
.card { background: var(--card); border: 1px solid var(--border); border-radius: 8px; margin-bottom: 16px; }
.card-header { padding: 16px 20px; border-bottom: 1px solid var(--border); font-weight: 600; font-size: 15px; }
.card-body { padding: 20px; }

/* ===== Table ===== */
.table-container { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 14px; }
thead th { background: #f1f3f4; padding: 10px 12px; text-align: left; font-weight: 600; color: var(--text-secondary); white-space: nowrap; border-bottom: 2px solid var(--border); }
tbody td { padding: 10px 12px; border-bottom: 1px solid var(--border); }
tbody tr:hover { background: #f8f9fa; }
tbody tr.clickable { cursor: pointer; }
.status-tag { display: inline-block; padding: 2px 8px; border-radius: 10px; font-size: 12px; font-weight: 500; }
.status-未退款 { background: #fce8e6; color: #c5221f; }
.status-退款中 { background: #fef7e0; color: #ea8600; }
.status-已全退 { background: #e6f4ea; color: #137333; }
.status-已提交 { background: #e8f0fe; color: #1a73e8; }
.status-已存档 { background: #f1f3f4; color: #5f6368; }

/* ===== Forms ===== */
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-bottom: 16px; }
.form-group { margin-bottom: 16px; }
.form-group label { display: block; margin-bottom: 6px; font-weight: 500; font-size: 13px; color: var(--text-secondary); }
.form-group input, .form-group select, .form-group textarea { width: 100%; padding: 8px 12px; border: 1px solid var(--border); border-radius: 6px; font-size: 14px; outline: none; }
.form-group input:focus, .form-group select:focus { border-color: var(--primary); box-shadow: 0 0 0 2px rgba(26,115,232,0.15); }
.form-group input.input-readonly { background: #f5f5f5; color: #666; cursor: not-allowed; }
.form-group textarea { min-height: 60px; resize: vertical; }
.form-group .hint { font-size: 12px; color: var(--text-secondary); margin-top: 4px; }

/* ===== Detail ===== */
.detail-grid { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 12px; }
.detail-item { padding: 8px 0; border-bottom: 1px solid #f1f3f4; }
.detail-item .label { font-size: 12px; color: var(--text-secondary); }
.detail-item .value { font-size: 15px; font-weight: 500; margin-top: 2px; }
.detail-item .value.highlight { color: var(--primary); font-size: 18px; }

/* ===== Tabs ===== */
.tabs { display: flex; gap: 0; border-bottom: 2px solid var(--border); margin-bottom: 20px; }
.tab { padding: 10px 20px; cursor: pointer; font-size: 14px; color: var(--text-secondary); border-bottom: 2px solid transparent; margin-bottom: -2px; transition: all 0.2s; }
.tab:hover { color: var(--text); }
.tab.active { color: var(--primary); border-bottom-color: var(--primary); font-weight: 600; }

/* ===== Modal ===== */
.modal-overlay { display: none; position: fixed; inset: 0; background: rgba(0,0,0,0.5); z-index: 1000; align-items: center; justify-content: center; }
.modal-overlay.show { display: flex; }
.modal { background: white; border-radius: 12px; width: 90%; max-width: 600px; max-height: 85vh; overflow-y: auto; box-shadow: 0 20px 60px rgba(0,0,0,0.3); }
.modal-header { padding: 16px 20px; border-bottom: 1px solid var(--border); display: flex; justify-content: space-between; align-items: center; }
.modal-header h3 { font-size: 18px; }
.modal-header .close-btn { background: none; border: none; font-size: 24px; cursor: pointer; color: var(--text-secondary); }
.modal-body { padding: 20px; }
.modal-footer { padding: 16px 20px; border-top: 1px solid var(--border); display: flex; justify-content: flex-end; gap: 10px; }

/* ===== Pagination ===== */
.pagination { display: flex; justify-content: center; align-items: center; gap: 8px; margin-top: 20px; }
.pagination .page-btn { padding: 6px 12px; border: 1px solid var(--border); border-radius: 4px; background: white; cursor: pointer; font-size: 13px; }
.pagination .page-btn:hover { background: var(--bg); }
.pagination .page-btn.active { background: var(--primary); color: white; border-color: var(--primary); }
.pagination .page-info { font-size: 13px; color: var(--text-secondary); }

/* ===== Summary ===== */
.summary-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-bottom: 24px; }
.summary-card { background: white; border: 1px solid var(--border); border-radius: 8px; padding: 20px; text-align: center; }
.summary-card .num { font-size: 28px; font-weight: 700; }
.summary-card .label { font-size: 13px; color: var(--text-secondary); margin-top: 4px; }

/* ===== Search ===== */
.search-bar { display: flex; gap: 10px; margin-bottom: 16px; flex-wrap: wrap; }
.search-bar input, .search-bar select { padding: 8px 12px; border: 1px solid var(--border); border-radius: 6px; font-size: 14px; }
.search-bar input { flex: 1; min-width: 200px; }
.search-bar .filter-group { display: flex; gap: 8px; }

/* ===== Toast ===== */
.toast { position: fixed; top: 20px; right: 20px; padding: 12px 20px; border-radius: 8px; color: white; font-size: 14px; z-index: 2000; animation: slideIn 0.3s ease; }
.toast-success { background: var(--success); }
.toast-error { background: var(--danger); }
.toast-info { background: var(--primary); }
@keyframes slideIn { from { transform: translateX(100%); opacity: 0; } to { transform: translateX(0); opacity: 1; } }

/* ===== Print hide ===== */
@media print { .sidebar, .page-header .header-actions, .search-bar, .pagination { display: none !important; } }

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .app-layout { flex-direction: column; }
  .sidebar { width: 100%; padding: 10px 0; }
  .sidebar-nav { display: flex; overflow-x: auto; }
  .sidebar-nav li a { white-space: nowrap; padding: 8px 14px; }
  .form-row { grid-template-columns: 1fr; }
  .detail-grid { grid-template-columns: 1fr 1fr; }
  .summary-grid { grid-template-columns: 1fr 1fr; }
  .main-content { padding: 12px; }
}