/* css/style.css */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --danger: #dc2626;
  --danger-light: #fef2f2;
  --success: #16a34a;
  --success-light: #f0fdf4;
  --warning: #d97706;
  --warning-light: #fffbeb;
  --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(0,0,0,0.1), 0 1px 2px rgba(0,0,0,0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -2px rgba(0,0,0,0.05);
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--gray-50);
  color: var(--gray-800);
  line-height: 1.5;
}

.app {
  max-width: 1200px;
  margin: 0 auto;
  padding: 20px;
}

.app-header {
  text-align: center;
  margin-bottom: 24px;
}

.app-header h1 {
  font-size: 28px;
  color: var(--gray-900);
}

.subtitle {
  color: var(--gray-500);
  font-size: 14px;
  margin-top: 4px;
}

/* 面板 */
.panel {
  background: #fff;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  margin-bottom: 20px;
  overflow: hidden;
}

.panel-title {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 20px;
  background: var(--gray-100);
  border-bottom: 1px solid var(--gray-200);
}

.panel-title h2 {
  font-size: 16px;
  font-weight: 600;
}

.panel-body {
  padding: 20px;
}

.panel-body.collapsed {
  display: none;
}

/* 表单 */
.form-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.form-group {
  display: flex;
  flex-direction: column;
}

.form-group.full-width {
  grid-column: 1 / -1;
}

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

.form-group input[type="number"],
.form-group input[type="date"] {
  padding: 8px 12px;
  border: 1px solid var(--gray-300);
  border-radius: var(--radius);
  font-size: 14px;
  outline: none;
  transition: border-color 0.2s;
}

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

.radio-group {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.radio-label {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  cursor: pointer;
  color: var(--gray-700);
}

.actions {
  display: flex;
  gap: 12px;
  margin-top: 8px;
}

/* 按钮 */
button {
  cursor: pointer;
  border: none;
  border-radius: var(--radius);
  font-size: 14px;
  transition: all 0.2s;
}

.btn-primary {
  background: var(--primary);
  color: #fff;
  padding: 10px 20px;
}

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

.btn-secondary {
  background: var(--gray-100);
  color: var(--gray-700);
  padding: 10px 20px;
  border: 1px solid var(--gray-300);
}

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

.btn-toggle {
  background: transparent;
  color: var(--primary);
  font-size: 13px;
  padding: 4px 8px;
}

.btn-close {
  background: transparent;
  color: var(--gray-500);
  font-size: 20px;
  line-height: 1;
}

/* 摘要卡片 */
.summary-section {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 20px;
}

.card {
  background: #fff;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 20px;
  text-align: center;
}

.card-blue {
  border-top: 3px solid var(--primary);
}

.card-red {
  border-top: 3px solid var(--danger);
}

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

.card-value {
  font-size: 22px;
  font-weight: 700;
  color: var(--gray-900);
}

.card-blue .card-value {
  color: var(--primary);
}

.card-red .card-value {
  color: var(--danger);
}

/* Tab */
.tab-nav {
  display: flex;
  gap: 4px;
  background: var(--gray-100);
  padding: 4px;
  border-radius: var(--radius);
  margin-bottom: 0;
}

.tab-btn {
  flex: 1;
  padding: 10px;
  background: transparent;
  color: var(--gray-600);
  font-weight: 500;
  border-radius: 6px;
}

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

.tab-panels {
  background: #fff;
  border-radius: 0 0 var(--radius) var(--radius);
  box-shadow: var(--shadow);
  min-height: 400px;
}

.tab-panel {
  display: none;
  padding: 20px;
}

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

/* 表格 */
.table-wrap {
  max-height: 500px;
  overflow-y: auto;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
}

.schedule-table,
.compare-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}

.schedule-table thead,
.compare-table thead {
  position: sticky;
  top: 0;
  background: var(--gray-50);
  z-index: 1;
}

.schedule-table th,
.compare-table th,
.schedule-table td,
.compare-table td {
  padding: 10px 12px;
  text-align: right;
  border-bottom: 1px solid var(--gray-200);
  white-space: nowrap;
}

.schedule-table th:first-child,
.schedule-table td:first-child,
.compare-table th:first-child,
.compare-table td:first-child {
  text-align: center;
}

.schedule-table th:nth-child(2),
.schedule-table td:nth-child(2) {
  text-align: center;
}

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

.schedule-table tbody tr.prepayed {
  background: var(--warning-light);
}

.schedule-table .num-green {
  color: var(--success);
}

.schedule-table .num-red {
  color: var(--danger);
}

tfoot {
  background: var(--gray-100);
  font-weight: 600;
}

/* 操作按钮 */
.btn-prepay {
  background: var(--warning);
  color: #fff;
  padding: 4px 10px;
  font-size: 12px;
}

.btn-prepay:disabled {
  background: var(--gray-400);
  cursor: not-allowed;
}

.btn-clear {
  background: var(--gray-500);
  color: #fff;
  margin-left: 6px;
}

.prepay-info {
  font-size: 12px;
  color: var(--warning);
  font-weight: 500;
}

/* 图表 */
.charts-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.chart-card {
  background: var(--gray-50);
  border-radius: var(--radius);
  padding: 16px;
}

.chart-card h3 {
  font-size: 14px;
  color: var(--gray-600);
  margin-bottom: 12px;
}

.chart-box {
  width: 100%;
  height: 320px;
}

/* 方案对比 */
.compare-section {
  margin-bottom: 24px;
}

.compare-section h3 {
  font-size: 16px;
  margin-bottom: 12px;
  color: var(--gray-800);
}

.scenario-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.scenario-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--primary);
  color: #fff;
  padding: 6px 12px;
  border-radius: 20px;
  font-size: 13px;
  cursor: pointer;
}

.scenario-tag .tag-close {
  background: rgba(255,255,255,0.3);
  color: #fff;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  padding: 0;
  cursor: pointer;
}

.scenario-tag.inactive {
  background: var(--gray-300);
  color: var(--gray-700);
}

.compare-table th.highlight,
.compare-table td.highlight {
  background: var(--success-light);
  color: var(--success);
  font-weight: 600;
}

/* 对比表头小标签 */
.compare-table th {
  vertical-align: top;
}

.th-name {
  font-weight: 600;
  font-size: 13px;
  margin-bottom: 6px;
  line-height: 1.4;
}

.th-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  justify-content: flex-end;
}

.th-tag {
  display: inline-block;
  padding: 2px 6px;
  background: var(--gray-200);
  border-radius: 4px;
  font-size: 11px;
  color: var(--gray-600);
  line-height: 1.3;
}

.th-tag.th-tag-prepay {
  background: var(--warning-light);
  color: var(--warning);
}

/* 弹窗 */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
}

.modal {
  background: #fff;
  border-radius: var(--radius);
  width: 90%;
  max-width: 420px;
  box-shadow: var(--shadow-lg);
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 20px;
  border-bottom: 1px solid var(--gray-200);
}

.modal-header h3 {
  font-size: 16px;
}

.modal-body {
  padding: 20px;
}

.modal-body .info-row {
  display: flex;
  justify-content: space-between;
  margin-bottom: 10px;
  font-size: 14px;
  color: var(--gray-600);
}

.modal-body .info-row strong {
  color: var(--gray-900);
}

.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  padding: 12px 20px;
  border-top: 1px solid var(--gray-200);
}

/* Toast */
.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: var(--gray-800);
  color: #fff;
  padding: 12px 20px;
  border-radius: var(--radius);
  font-size: 14px;
  opacity: 0;
  transform: translateY(10px);
  transition: all 0.3s;
  pointer-events: none;
  z-index: 200;
}

.toast.show {
  opacity: 1;
  transform: translateY(0);
}

/* 响应式 */
@media (max-width: 768px) {
  .app {
    padding: 12px;
  }

  .form-grid {
    grid-template-columns: 1fr;
  }

  .form-group.full-width {
    grid-column: 1;
  }

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

  .charts-grid {
    grid-template-columns: 1fr;
  }

  .chart-box {
    height: 260px;
  }

  .actions {
    flex-direction: column;
  }
}

/* 工具栏 */
.panel-tools {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  margin-bottom: 12px;
}

/* 已设提前还款列表 */
.prepayment-list {
  margin-bottom: 12px;
  padding: 12px 16px;
  background: var(--warning-light);
  border-radius: var(--radius);
  border-left: 3px solid var(--warning);
}

.prepay-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
}

.prepay-header h4 {
  font-size: 14px;
  color: var(--gray-700);
}

.prepay-items {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.prepay-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  background: #fff;
  border-radius: 20px;
  font-size: 13px;
  color: var(--gray-700);
  box-shadow: var(--shadow);
}

.prepay-item.prepay-skipped {
  opacity: 0.6;
  background: var(--gray-100);
  text-decoration: line-through;
}

.prepay-item.prepay-skipped span {
  color: var(--gray-400);
}

.prepay-item .btn-remove {
  background: transparent;
  color: var(--danger);
  font-size: 16px;
  line-height: 1;
  padding: 0;
  width: 18px;
  height: 18px;
  cursor: pointer;
}

.btn-text {
  background: transparent;
  color: var(--danger);
  font-size: 13px;
  padding: 2px 6px;
  text-decoration: underline;
}

/* 批量设置面板 */
.batch-prepay-panel {
  margin-bottom: 12px;
  padding: 16px;
  background: var(--gray-100);
  border-radius: var(--radius);
  border: 1px solid var(--gray-200);
}

.batch-prepay-panel h4 {
  font-size: 14px;
  margin-bottom: 12px;
  color: var(--gray-700);
}

.batch-form {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: flex-end;
}

.batch-form .form-group {
  flex: 1;
  min-width: 140px;
}

.batch-actions {
  display: flex;
  gap: 8px;
  margin-left: auto;
}

.batch-preview {
  margin-top: 12px;
  padding: 10px 14px;
  background: var(--primary-light);
  border-radius: 6px;
  font-size: 13px;
  color: var(--gray-700);
  display: none;
}

.prepay-estimate {
  margin-top: 12px;
  padding: 12px;
  background: var(--primary-light);
  border-radius: 6px;
  font-size: 13px;
  color: var(--gray-700);
  line-height: 1.6;
}

.batch-preview.active {
  display: block;
}

.analysis-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 12px;
}

.analysis-card {
  background: var(--gray-100);
  border-radius: var(--radius);
  padding: 14px 16px;
  border-left: 3px solid var(--primary);
}

.analysis-card h5 {
  font-size: 14px;
  color: var(--gray-700);
  margin-bottom: 6px;
}

.analysis-card p {
  font-size: 13px;
  color: var(--gray-600);
  line-height: 1.6;
}

.analysis-card .highlight-num {
  color: var(--success);
  font-weight: 600;
}

.compare-charts .chart-card h4 {
  font-size: 14px;
  color: var(--gray-700);
  margin-bottom: 8px;
  text-align: center;
}

/* 推荐标记 */
.recommend-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  color: var(--warning);
  font-size: 13px;
}