/* 现代化后台管理系统样式 - 优化版 */

:root {
  /* 主色调 */
  --primary: #3b82f6;
  --primary-light: #60a5fa;
  --primary-dark: #2563eb;
  --primary-bg: #eff6ff;
  
  /* 功能色 */
  --success: #10b981;
  --success-light: #34d399;
  --warning: #f59e0b;
  --warning-light: #fbbf24;
  --danger: #ef4444;
  --danger-light: #f87171;
  --info: #06b6d4;
  
  /* 灰度 */
  --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;
  
  /* 阴影 */
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
  
  /* 圆角 */
  --radius-sm: 4px;
  --radius: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  
  /* 间距 */
  --space-xs: 4px;
  --space-sm: 8px;
  --space: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  
  /* 字体 */
  --font: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-mono: 'SF Mono', Monaco, 'Cascadia Code', 'Roboto Mono', Consolas, monospace;
  
  /* 过渡 */
  --transition: all 0.2s ease;
  --transition-slow: all 0.3s ease;
}

/* 重置 */
*, *::before, *::after { box-sizing: border-box; }
html, body { 
  margin: 0; 
  padding: 0; 
  height: 100%;
  font-family: var(--font);
  font-size: 14px;
  line-height: 1.5;
  color: var(--gray-800);
  background: var(--gray-100);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.hidden { display: none !important; }

/* ==================== 登录页 ==================== */
#login-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #f093fb 100%);
  position: relative;
  overflow: hidden;
}

#login-page::before {
  content: '';
  position: absolute;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 50%);
  animation: pulse 15s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { transform: translate(-25%, -25%) scale(1); }
  50% { transform: translate(-25%, -25%) scale(1.1); }
}

.login-box {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-radius: var(--radius-xl);
  padding: 48px 40px;
  width: 420px;
  box-shadow: var(--shadow-xl), 0 0 0 1px rgba(255,255,255,0.1);
  position: relative;
  z-index: 1;
}

.login-header {
  text-align: center;
  margin-bottom: 32px;
}

.login-header h1 {
  font-size: 28px;
  font-weight: 700;
  color: var(--gray-900);
  margin: 0 0 8px 0;
  background: linear-gradient(135deg, #667eea, #764ba2);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.login-header p {
  color: var(--gray-500);
  font-size: 14px;
  margin: 0;
}

.login-tip {
  text-align: center;
  margin-top: 24px;
  color: var(--gray-400);
  font-size: 13px;
}

/* ==================== 表单 ==================== */
.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  margin-bottom: 6px;
  font-weight: 500;
  color: var(--gray-700);
  font-size: 14px;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 10px 14px;
  border: 1.5px solid var(--gray-200);
  border-radius: var(--radius);
  font-size: 14px;
  font-family: inherit;
  background: #fff;
  color: var(--gray-800);
  transition: var(--transition);
}

.form-group input:hover,
.form-group select:hover,
.form-group textarea:hover {
  border-color: var(--gray-300);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
}

.form-group textarea {
  resize: vertical;
  min-height: 80px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.form-input,
.form-select {
  height: 40px;
  padding: 0 14px;
  border: 1.5px solid var(--gray-200);
  border-radius: var(--radius);
  font-size: 14px;
  font-family: inherit;
  background: #fff;
  color: var(--gray-800);
  transition: var(--transition);
}

.form-input:focus,
.form-select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
}

/* ==================== 按钮 ==================== */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 44px;
  min-width: 100px;
  padding: 0 20px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: #fff;
  border: none;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: var(--transition);
  box-shadow: 0 2px 8px rgba(59, 130, 246, 0.3);
}

.btn-primary:hover {
  background: linear-gradient(135deg, var(--primary-light) 0%, var(--primary) 100%);
  box-shadow: 0 4px 12px rgba(59, 130, 246, 0.4);
  transform: translateY(-1px);
}

.btn-primary:active {
  transform: translateY(0);
  box-shadow: 0 1px 4px rgba(59, 130, 246, 0.3);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 44px;
  min-width: 100px;
  padding: 0 20px;
  background: #fff;
  color: var(--gray-700);
  border: 1.5px solid var(--gray-200);
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: var(--transition);
}

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

.btn-success {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 44px;
  min-width: 100px;
  padding: 0 20px;
  background: linear-gradient(135deg, var(--success) 0%, #059669 100%);
  color: #fff;
  border: none;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: var(--transition);
  box-shadow: 0 2px 8px rgba(16, 185, 129, 0.3);
}

.btn-success:hover {
  background: linear-gradient(135deg, var(--success-light) 0%, var(--success) 100%);
  box-shadow: 0 4px 12px rgba(16, 185, 129, 0.4);
  transform: translateY(-1px);
}

.btn-warning {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 44px;
  min-width: 100px;
  padding: 0 20px;
  background: linear-gradient(135deg, var(--warning) 0%, #d97706 100%);
  color: #fff;
  border: none;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: var(--transition);
  box-shadow: 0 2px 8px rgba(245, 158, 11, 0.3);
}

.btn-warning:hover {
  background: linear-gradient(135deg, var(--warning-light) 0%, var(--warning) 100%);
  box-shadow: 0 4px 12px rgba(245, 158, 11, 0.4);
  transform: translateY(-1px);
}

.btn-danger {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 44px;
  min-width: 100px;
  padding: 0 20px;
  background: linear-gradient(135deg, var(--danger) 0%, #dc2626 100%);
  color: #fff;
  border: none;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: var(--transition);
  box-shadow: 0 2px 8px rgba(239, 68, 68, 0.3);
}

.btn-danger:hover {
  background: linear-gradient(135deg, var(--danger-light) 0%, var(--danger) 100%);
  box-shadow: 0 4px 12px rgba(239, 68, 68, 0.4);
  transform: translateY(-1px);
}

.btn-link {
  background: none;
  border: none;
  color: var(--primary);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}

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

.btn-block { width: 100%; }

.btn-sm {
  height: 32px;
  padding: 0 12px;
  font-size: 13px;
  min-width: auto;
}

/* ==================== 侧边栏 ==================== */
.sidebar {
  position: fixed;
  left: 0;
  top: 0;
  width: 240px;
  height: 100vh;
  background: linear-gradient(180deg, var(--gray-900) 0%, var(--gray-800) 100%);
  color: #fff;
  display: flex;
  flex-direction: column;
  z-index: 100;
  box-shadow: var(--shadow-lg);
}

.sidebar-header {
  padding: 24px 20px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}

.sidebar-header h2 {
  margin: 0;
  font-size: 20px;
  font-weight: 700;
  background: linear-gradient(135deg, #60a5fa, #a78bfa);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.sidebar-nav {
  flex: 1;
  padding: 16px 0;
  overflow-y: auto;
}

.nav-item {
  display: flex;
  align-items: center;
  padding: 12px 20px;
  color: var(--gray-400);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  transition: var(--transition);
  border-left: 3px solid transparent;
  gap: 12px;
}

.nav-item:hover {
  background: rgba(255,255,255,0.05);
  color: #fff;
}

.nav-item.active {
  background: rgba(59, 130, 246, 0.15);
  color: var(--primary-light);
  border-left-color: var(--primary);
}

.nav-item .icon {
  font-size: 18px;
  width: 20px;
  text-align: center;
}

.sidebar-footer {
  padding: 16px 20px;
  border-top: 1px solid rgba(255,255,255,0.1);
}

.user-info {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.user-name {
  font-weight: 600;
  color: #fff;
}

.user-role {
  font-size: 12px;
  color: var(--gray-500);
}

/* ==================== 顶部导航栏 ==================== */
.top-header {
  position: fixed;
  top: 0;
  left: 240px;
  right: 0;
  height: 60px;
  background: #fff;
  border-bottom: 1px solid var(--gray-200);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  z-index: 99;
  box-shadow: var(--shadow-sm);
}

.header-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--gray-800);
}

.header-right {
  display: flex;
  align-items: center;
  gap: 20px;
}

.user-info-header {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--gray-600);
}

.user-info-header .user-role {
  font-size: 12px;
  color: var(--gray-400);
  background: var(--gray-100);
  padding: 2px 8px;
  border-radius: 12px;
}

/* ==================== 主内容区 ==================== */
.main-content {
  margin-left: 240px;
  margin-top: 60px;
  padding: 24px;
  min-height: calc(100vh - 60px);
  background: var(--gray-50);
}

.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
  padding: 20px 24px;
  background: #fff;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
}

.page-header h1 {
  margin: 0;
  font-size: 20px;
  font-weight: 700;
  color: var(--gray-800);
}

/* ==================== 统计卡片 ==================== */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 20px;
  margin-bottom: 24px;
}

.stat-card {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow);
  transition: var(--transition);
  border: 1px solid var(--gray-100);
  position: relative;
  overflow: hidden;
}

.stat-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--primary-light));
}

.stat-card:nth-child(2)::before { background: linear-gradient(90deg, var(--success), var(--success-light)); }
.stat-card:nth-child(3)::before { background: linear-gradient(90deg, var(--warning), var(--warning-light)); }
.stat-card:nth-child(4)::before { background: linear-gradient(90deg, var(--danger), var(--danger-light)); }
.stat-card:nth-child(5)::before { background: linear-gradient(90deg, var(--info), #22d3ee); }

.stat-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.stat-value {
  font-size: 36px;
  font-weight: 800;
  color: var(--gray-800);
  margin-bottom: 4px;
  line-height: 1;
}

.stat-label {
  font-size: 14px;
  color: var(--gray-500);
  font-weight: 500;
}

/* ==================== 表格 ==================== */
.table-container {
  background: #fff;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  overflow: hidden;
  border: 1px solid var(--gray-100);
}

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

.data-table th {
  background: var(--gray-50);
  padding: 14px 16px;
  text-align: left;
  font-weight: 600;
  font-size: 13px;
  color: var(--gray-600);
  border-bottom: 1px solid var(--gray-200);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

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

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

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

/* ==================== 徽章 ==================== */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  border-radius: 12px;
  font-size: 12px;
  font-weight: 600;
  line-height: 1;
}

.badge-success {
  background: rgba(16, 185, 129, 0.1);
  color: #059669;
}

.badge-warning {
  background: rgba(245, 158, 11, 0.1);
  color: #d97706;
}

.badge-danger {
  background: rgba(239, 68, 68, 0.1);
  color: #dc2626;
}

/* ==================== 弹窗 ==================== */
.modal {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(4px);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.modal.show {
  display: flex;
}

.modal-content {
  background: #fff;
  border-radius: var(--radius-xl);
  width: 90%;
  max-width: 560px;
  max-height: 90vh;
  overflow: hidden;
  box-shadow: var(--shadow-xl);
  display: flex;
  flex-direction: column;
}

.modal-header {
  padding: 20px 24px;
  border-bottom: 1px solid var(--gray-200);
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--gray-50);
}

.modal-header h3 {
  margin: 0;
  font-size: 18px;
  font-weight: 700;
  color: var(--gray-800);
}

.modal-close {
  background: none;
  border: none;
  font-size: 24px;
  color: var(--gray-400);
  cursor: pointer;
  padding: 4px;
  line-height: 1;
  transition: var(--transition);
  border-radius: var(--radius-sm);
}

.modal-close:hover {
  background: var(--gray-200);
  color: var(--gray-600);
}

.modal-body {
  padding: 24px;
  overflow-y: auto;
  flex: 1;
}

.modal-footer {
  padding: 16px 24px;
  border-top: 1px solid var(--gray-200);
  background: var(--gray-50);
  display: flex;
  justify-content: flex-end;
  gap: 12px;
}

/* ==================== 筛选栏 ==================== */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  padding: 16px 20px;
  background: #fff;
  border-radius: var(--radius-lg);
  margin-bottom: 20px;
  box-shadow: var(--shadow);
  border: 1px solid var(--gray-100);
}

.filter-bar .form-input,
.filter-bar .form-select {
  flex: 0 0 auto;
  min-width: 150px;
}

/* ==================== 分页 ==================== */
.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 8px;
  margin-top: 20px;
}

.pagination button {
  height: 36px;
  min-width: 36px;
  padding: 0 12px;
  border: 1px solid var(--gray-200);
  background: #fff;
  border-radius: var(--radius);
  font-size: 14px;
  color: var(--gray-600);
  cursor: pointer;
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.pagination button:hover:not(:disabled) {
  border-color: var(--primary);
  color: var(--primary);
}

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

.pagination span {
  color: var(--gray-600);
  font-size: 14px;
}

/* ==================== 操作按钮组 ==================== */
.action-btns {
  display: flex;
  gap: 8px;
}

/* ==================== 图表卡片 ==================== */
.chart-row {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.chart-card {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 20px;
  box-shadow: var(--shadow);
  border: 1px solid var(--gray-100);
}

.chart-card h3 {
  margin: 0 0 16px 0;
  font-size: 16px;
  font-weight: 600;
  color: var(--gray-700);
}

.chart-container {
  min-height: 200px;
  color: var(--gray-600);
}

/* ==================== 核销相关 ==================== */
.redeem-container {
  max-width: 600px;
  margin: 0 auto;
}

.redeem-input {
  display: flex;
  gap: 12px;
  margin-bottom: 24px;
}

.redeem-input input {
  flex: 1;
  padding: 14px 18px;
  border: 2px solid var(--gray-200);
  border-radius: var(--radius-lg);
  font-size: 18px;
  font-family: var(--font-mono);
  letter-spacing: 1px;
  transition: var(--transition);
}

.redeem-input input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
}

.verify-result {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow);
}

.result-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--gray-100);
}

.result-icon {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
}

.result-icon.success {
  background: rgba(16, 185, 129, 0.1);
  color: var(--success);
}

.result-icon.error {
  background: rgba(239, 68, 68, 0.1);
  color: var(--danger);
}

.result-title {
  font-size: 20px;
  font-weight: 700;
  color: var(--gray-800);
}

.result-body {
  margin-bottom: 20px;
}

.info-row {
  display: flex;
  padding: 8px 0;
  border-bottom: 1px dashed var(--gray-200);
}

.info-row .label {
  color: var(--gray-500);
  width: 100px;
  flex-shrink: 0;
}

.result-actions {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

/* ==================== 门店勾选 ==================== */
.store-list-group {
  background: var(--gray-50);
  border-radius: var(--radius);
  padding: 12px;
  max-height: 200px;
  overflow-y: auto;
  border: 1px solid var(--gray-200);
}

.store-list-item {
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}

.store-list-item:hover {
  background: #fff;
}

.store-list-item label {
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  font-size: 14px;
  color: var(--gray-700);
}

.store-list-item input[type="checkbox"] {
  width: 18px;
  height: 18px;
  accent-color: var(--primary);
  cursor: pointer;
}

/* ==================== 批次详情 ==================== */
.batch-detail {
  font-size: 14px;
}

.detail-row {
  display: flex;
  padding: 8px 0;
}

.detail-row label {
  color: var(--gray-500);
  width: 100px;
  flex-shrink: 0;
}

.detail-row span {
  color: var(--gray-700);
}

.coupon-list {
  background: var(--gray-50);
  border-radius: var(--radius);
  padding: 12px;
  max-height: 250px;
  overflow-y: auto;
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: 13px;
  white-space: pre-wrap;
  word-break: break-all;
}

/* ==================== 权限树 ==================== */
.perm-tree {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.perm-category {
  background: var(--gray-50);
  border-radius: var(--radius);
  padding: 16px;
  border: 1px solid var(--gray-200);
}

.perm-cat-title {
  font-weight: 600;
  color: var(--gray-700);
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--gray-200);
  font-size: 14px;
}

.perm-items {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.perm-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  color: var(--gray-600);
  cursor: pointer;
  padding: 6px 8px;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}

.perm-item:hover {
  background: #fff;
  color: var(--primary);
}

.perm-item input[type="checkbox"] {
  width: 16px;
  height: 16px;
  accent-color: var(--primary);
}

.role-perm-view {
  max-height: 60vh;
  overflow-y: auto;
}

.role-perm-view .role-info {
  margin-bottom: 16px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--gray-200);
}

.role-perm-view .role-info h4 {
  font-size: 16px;
  margin: 0 0 4px 0;
}

.role-perm-view .role-info p {
  color: var(--gray-500);
  font-size: 13px;
  margin: 0;
}

/* ==================== 报表列表 ==================== */
.report-list {
  max-height: 200px;
  overflow-y: auto;
}

.report-item {
  display: flex;
  justify-content: space-between;
  padding: 8px 12px;
  border-bottom: 1px solid var(--gray-100);
  font-size: 13px;
}

.report-item:hover {
  background: var(--gray-50);
}

.report-item span:first-child {
  color: var(--gray-600);
}

.report-item span:last-child {
  color: var(--primary);
  font-weight: 600;
}

/* ==================== 响应式 ==================== */
@media (max-width: 1200px) {
  .chart-row {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .sidebar {
    transform: translateX(-100%);
  }
  
  .sidebar.open {
    transform: translateX(0);
  }
  
  .top-header {
    left: 0;
  }
  
  .main-content {
    margin-left: 0;
  }
  
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .form-row {
    grid-template-columns: 1fr;
  }
  
  .perm-tree {
    grid-template-columns: 1fr;
  }
}