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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'PingFang SC', 'Microsoft YaHei', sans-serif;
    background: #f5f7fa;
    color: #333;
    line-height: 1.6;
}

.admin-layout {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: 240px;
    background: linear-gradient(180deg, #1a1a2e 0%, #16213e 100%);
    color: #fff;
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    overflow-y: auto;
}

.sidebar-header {
    padding: 24px 20px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-icon {
    width: 44px;
    height: 44px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.logo-icon svg {
    width: 24px;
    height: 24px;
}

.logo-text h2 {
    font-size: 16px;
    font-weight: 600;
}

.logo-text span {
    font-size: 12px;
    color: rgba(255,255,255,0.6);
}

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

.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 20px;
    color: rgba(255,255,255,0.7);
    text-decoration: none;
    transition: all 0.3s;
    border-left: 3px solid transparent;
}

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

.nav-item.active {
    background: rgba(102,126,234,0.2);
    color: #fff;
    border-left-color: #667eea;
}

.nav-icon {
    font-size: 18px;
}

.sidebar-footer {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding: 8px 0;
}

.main-content {
    margin-left: 240px;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.top-header {
    background: #fff;
    padding: 16px 32px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 100;
}

.page-title {
    font-size: 22px;
    font-weight: 600;
    color: #333;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 8px;
    color: #666;
    font-size: 14px;
}

.user-avatar {
    width: 36px;
    height: 36px;
    background: #e8e8e8;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.content-area {
    padding: 24px;
    flex: 1;
}

.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.page-actions {
    display: flex;
    gap: 12px;
}

.btn {
    display: inline-block;
    padding: 8px 20px;
    border: none;
    border-radius: 6px;
    font-size: 14px;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.3s;
    font-weight: 500;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(102,126,234,0.4);
}

.btn-success {
    background: linear-gradient(135deg, #11998e 0%, #38ef7d 100%);
    color: #fff;
}

.btn-success:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(17,153,142,0.4);
}

.btn-danger {
    background: linear-gradient(135deg, #c31432 0%, #240b36 100%);
    color: #fff;
}

.btn-danger:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(195,20,50,0.4);
}

.btn-warning {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    color: #fff;
}

.btn-warning:hover {
    transform: translateY(-2px);
}

.btn-default {
    background: #e8e8e8;
    color: #666;
}

.btn-default:hover {
    background: #ddd;
}

.alert {
    padding: 12px 20px;
    border-radius: 8px;
    margin-bottom: 16px;
    font-size: 14px;
}

.alert-success {
    background: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.alert-error {
    background: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.alert-warning {
    background: #fff3cd;
    color: #856404;
    border: 1px solid #ffeeba;
}

.card {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 2px 12px rgba(0,0,0,0.06);
    margin-bottom: 24px;
    overflow: hidden;
}

.card-header {
    padding: 16px 24px;
    border-bottom: 1px solid #f0f0f0;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.card-header h3 {
    font-size: 16px;
    font-weight: 600;
    color: #333;
}

.card-header p {
    color: #999;
    font-size: 13px;
    margin-top: 4px;
}

.view-all {
    color: #667eea;
    text-decoration: none;
    font-size: 14px;
}

.view-all:hover {
    text-decoration: underline;
}

.card-body {
    padding: 24px;
}

.dashboard {
    padding: 0;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 20px;
    margin-bottom: 24px;
}

.stat-card {
    background: #fff;
    border-radius: 12px;
    padding: 24px;
    display: flex;
    align-items: center;
    gap: 16px;
    box-shadow: 0 2px 12px rgba(0,0,0,0.06);
    transition: all 0.3s;
}

.stat-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0,0,0,0.1);
}

.stat-icon {
    width: 56px;
    height: 56px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
}

.stat-primary .stat-icon {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.stat-success .stat-icon {
    background: linear-gradient(135deg, #11998e 0%, #38ef7d 100%);
}

.stat-warning .stat-icon {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
}

.stat-info .stat-icon {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
}

.stat-value {
    font-size: 28px;
    font-weight: 700;
    color: #333;
}

.stat-label {
    font-size: 14px;
    color: #999;
    margin-top: 4px;
}

.dashboard-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.chart-card {
    min-height: 300px;
}

.chart-container {
    height: 260px;
}

.filter-bar {
    background: #fff;
    border-radius: 12px;
    padding: 16px 20px;
    box-shadow: 0 2px 12px rgba(0,0,0,0.06);
    margin-bottom: 16px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
}

.filter-bar form {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    align-items: center;
}

.filter-bar input[type="text"],
.filter-bar select,
.filter-bar input[type="date"] {
    padding: 8px 12px;
    border: 2px solid #e1e1e1;
    border-radius: 6px;
    font-size: 14px;
    transition: border-color 0.3s;
}

.filter-bar input[type="text"]:focus,
.filter-bar select:focus,
.filter-bar input[type="date"]:focus {
    border-color: #667eea;
    outline: none;
}

.table-container {
    background: #fff;
    border-radius: 12px;
    overflow-x: auto;
    box-shadow: 0 2px 12px rgba(0,0,0,0.06);
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
}

.data-table th {
    background: #f8f9fa;
    color: #666;
    font-weight: 600;
    padding: 12px 16px;
    text-align: left;
    white-space: nowrap;
}

.data-table td {
    padding: 12px 16px;
    border-top: 1px solid #f0f0f0;
    white-space: nowrap;
}

.data-table tbody tr:hover {
    background: #f8f9fa;
}

.data-table code {
    background: #f0f0f0;
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 13px;
    color: #666;
}

.empty-state {
    text-align: center;
    color: #999;
    padding: 40px 20px;
}

.badge {
    display: inline-block;
    padding: 4px 10px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 600;
}

.badge-success {
    background: #d4edda;
    color: #155724;
}

.badge-danger {
    background: #f8d7da;
    color: #721c24;
}

.badge-warning {
    background: #fff3cd;
    color: #856404;
}

.badge-info {
    background: #d1ecf1;
    color: #0c5460;
}

.badge-secondary {
    background: #e2e3e5;
    color: #383d41;
}

.bulk-actions {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
}

.selected-count {
    color: #999;
    font-size: 14px;
}

.qr-code-cell {
    display: flex;
    align-items: center;
    gap: 8px;
}

.qr-actions {
    display: none;
    gap: 4px;
}

.qr-code-cell:hover .qr-actions {
    display: flex;
}

.qr-actions a {
    font-size: 16px;
    text-decoration: none;
}

.btn-link {
    color: #667eea;
    text-decoration: none;
    font-size: 13px;
}

.btn-link:hover {
    text-decoration: underline;
}

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

.page-btn {
    padding: 6px 12px;
    border: 1px solid #ddd;
    border-radius: 4px;
    color: #666;
    text-decoration: none;
    font-size: 14px;
    transition: all 0.3s;
}

.page-btn:hover {
    background: #f5f5f5;
    border-color: #667eea;
    color: #667eea;
}

.page-btn.active {
    background: #667eea;
    color: #fff;
    border-color: #667eea;
}

.page-info {
    color: #999;
    font-size: 13px;
    margin-left: 12px;
}

.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0,0,0,0.5);
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.modal.active,
.modal[style*="display: flex"] {
    display: flex !important;
}

.modal-content {
    background: #fff;
    border-radius: 12px;
    width: 90%;
    max-width: 500px;
    max-height: 90vh;
    overflow-y: auto;
}

.modal-sm {
    max-width: 320px;
}

.modal-header {
    padding: 16px 24px;
    border-bottom: 1px solid #f0f0f0;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h3 {
    font-size: 18px;
    font-weight: 600;
}

.modal-close {
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    color: #999;
}

.modal-body {
    padding: 24px;
}

.modal-footer {
    padding: 16px 24px;
    border-top: 1px solid #f0f0f0;
    display: flex;
    justify-content: flex-end;
    gap: 12px;
}

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

.form-group label {
    display: block;
    margin-bottom: 6px;
    color: #666;
    font-size: 14px;
    font-weight: 500;
}

.form-group input[type="text"],
.form-group input[type="number"],
.form-group input[type="password"],
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 10px 14px;
    border: 2px solid #e1e1e1;
    border-radius: 6px;
    font-size: 14px;
    transition: border-color 0.3s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: #667eea;
    outline: none;
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

.form-group input[type="checkbox"] {
    margin-right: 6px;
}

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

.hint {
    color: #999;
    font-size: 13px;
    margin-top: 4px;
}

.tabs {
    display: flex;
    gap: 8px;
    margin-bottom: 20px;
    background: #fff;
    border-radius: 12px;
    padding: 8px;
    box-shadow: 0 2px 12px rgba(0,0,0,0.06);
}

.tab {
    flex: 1;
    padding: 10px 16px;
    border-radius: 8px;
    cursor: pointer;
    text-align: center;
    color: #666;
    font-weight: 500;
    transition: all 0.3s;
}

.tab:hover {
    background: #f5f5f5;
}

.tab.active {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
}

.tab-content {
    display: none;
}

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

.info-table {
    width: 100%;
}

.info-table td {
    padding: 10px 0;
    border-bottom: 1px solid #f0f0f0;
}

.info-table td:first-child {
    color: #999;
    width: 150px;
}

@media (max-width: 768px) {
    .sidebar {
        width: 60px;
    }
    
    .sidebar-header .logo-text,
    .nav-text {
        display: none;
    }
    
    .main-content {
        margin-left: 60px;
    }
    
    .dashboard-row {
        grid-template-columns: 1fr;
    }
    
    .stats-grid {
        grid-template-columns: 1fr 1fr;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
}