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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 20px;
}

.container {
    max-width: 800px;
    margin: 0 auto;
}

.header {
    text-align: center;
    color: white;
    margin-bottom: 30px;
}

.header h1 {
    font-size: 2.5em;
    margin-bottom: 10px;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.2);
}

.header p {
    font-size: 1.1em;
    opacity: 0.9;
}

.card {
    background: white;
    border-radius: 16px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.15);
    padding: 30px;
    margin-bottom: 20px;
}

.card-title {
    font-size: 1.3em;
    color: #333;
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 2px solid #667eea;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: #555;
    font-weight: 500;
}

.form-group label .required {
    color: #f44336;
}

.form-control {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    font-size: 1em;
    transition: border-color 0.3s;
}

.form-control:focus {
    outline: none;
    border-color: #667eea;
}

select.form-control {
    cursor: pointer;
}

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

.file-upload {
    border: 2px dashed #ccc;
    border-radius: 8px;
    padding: 30px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s;
}

.file-upload:hover {
    border-color: #667eea;
    background: #f8f6ff;
}

.file-upload input[type="file"] {
    display: none;
}

.file-upload .file-icon {
    font-size: 3em;
    color: #667eea;
    margin-bottom: 10px;
}

.file-upload .file-hint {
    color: #888;
    font-size: 0.9em;
}

.file-upload .file-name {
    color: #333;
    font-weight: 500;
    margin-top: 10px;
}

.price-display {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 20px;
    border-radius: 12px;
    text-align: center;
    margin: 20px 0;
}

.price-display .price-label {
    font-size: 0.9em;
    opacity: 0.9;
    margin-bottom: 5px;
}

.price-display .price-value {
    font-size: 2.5em;
    font-weight: bold;
}

.price-row {
    display: flex;
    justify-content: space-between;
    padding: 10px 0;
    border-bottom: 1px solid #eee;
}

.price-row:last-child {
    border-bottom: none;
}

.btn {
    display: inline-block;
    padding: 15px 30px;
    border: none;
    border-radius: 8px;
    font-size: 1.1em;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s;
    text-align: center;
}

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

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(102, 126, 234, 0.4);
}

.btn-primary:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.btn-block {
    display: block;
    width: 100%;
}

.row {
    display: flex;
    gap: 15px;
}

.row .form-group {
    flex: 1;
}

@media (max-width: 600px) {
    .row {
        flex-direction: column;
    }
}

.alert {
    padding: 15px 20px;
    border-radius: 8px;
    margin-bottom: 20px;
}

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

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

.alert-info {
    background: #d1ecf1;
    color: #0c5460;
    border: 1px solid #bee5eb;
}

.nav-tabs {
    display: flex;
    border-bottom: 2px solid #e0e0e0;
    margin-bottom: 20px;
}

.nav-tab {
    padding: 12px 24px;
    color: #666;
    text-decoration: none;
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
    transition: all 0.3s;
}

.nav-tab:hover {
    color: #667eea;
}

.nav-tab.active {
    color: #667eea;
    border-bottom-color: #667eea;
}

.order-info {
    background: #f8f9fa;
    padding: 20px;
    border-radius: 8px;
    margin-bottom: 20px;
}

.order-info .info-row {
    display: flex;
    justify-content: space-between;
    padding: 8px 0;
    border-bottom: 1px solid #eee;
}

.order-info .info-row:last-child {
    border-bottom: none;
}

.qrcode-section {
    text-align: center;
    padding: 30px;
}

.qrcode-section img {
    max-width: 250px;
    border: 1px solid #eee;
    border-radius: 8px;
}

.admin-header {
    background: white;
    padding: 15px 30px;
    border-radius: 12px;
    margin-bottom: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.admin-header .admin-title {
    font-size: 1.5em;
    font-weight: bold;
    color: #333;
}

.admin-header .admin-nav a {
    color: #667eea;
    text-decoration: none;
    margin-left: 20px;
}

.table-wrapper {
    overflow-x: auto;
}

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

table th, table td {
    padding: 12px 15px;
    text-align: left;
    border-bottom: 1px solid #eee;
}

table th {
    background: #f8f9fa;
    font-weight: 600;
    color: #333;
}

table tr:hover {
    background: #f8f6ff;
}

.badge {
    display: inline-block;
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 0.85em;
}

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

.badge-paid {
    background: #cce5ff;
    color: #004085;
}

.badge-processing {
    background: #ffe5d0;
    color: #b35900;
}

.badge-shipped {
    background: #e2d5f1;
    color: #6c359c;
}

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

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

.action-btn {
    padding: 6px 12px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.9em;
    margin-right: 5px;
}

.action-btn-view {
    background: #e3f2fd;
    color: #1565c0;
}

.action-btn-edit {
    background: #fff3e0;
    color: #e65100;
}

.action-btn-delete {
    background: #ffebee;
    color: #c62828;
}

.pagination {
    display: flex;
    justify-content: center;
    margin-top: 20px;
    gap: 5px;
}

.pagination a, .pagination span {
    padding: 8px 12px;
    border: 1px solid #ddd;
    border-radius: 4px;
    text-decoration: none;
    color: #333;
}

.pagination a:hover {
    background: #667eea;
    color: white;
    border-color: #667eea;
}

.pagination .current {
    background: #667eea;
    color: white;
    border-color: #667eea;
}

.settings-section {
    margin-bottom: 30px;
}

.settings-section h3 {
    margin-bottom: 15px;
    color: #333;
    font-size: 1.1em;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 20px;
}

.stat-card {
    background: white;
    border-radius: 12px;
    padding: 25px;
    text-align: center;
}

.stat-card .stat-value {
    font-size: 2.5em;
    font-weight: bold;
    color: #667eea;
    margin-bottom: 5px;
}

.stat-card .stat-label {
    color: #666;
    font-size: 0.95em;
}