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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f8f9fa;
    color: #333;
}

/* Layout */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
.admin-header {
    background: #2c3e50;
    color: white;
    padding: 1rem 0;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.admin-header h1 {
    font-size: 1.5rem;
    margin-bottom: 0;
}

.admin-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.admin-nav ul {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.admin-nav a {
    color: white;
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    transition: background 0.3s;
}

.admin-nav a:hover {
    background: rgba(255,255,255,0.1);
}

.admin-nav .logout {
    background: #e74c3c;
    padding: 0.5rem 1rem;
    border-radius: 4px;
}

.admin-nav .logout:hover {
    background: #c0392b;
}

/* Main Content */
.admin-main {
    padding: 2rem 0;
}

.admin-content {
    background: white;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    padding: 2rem;
    margin-bottom: 2rem;
}

/* Cards */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: white;
    padding: 1.5rem;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    text-align: center;
    border-left: 4px solid #3498db;
}

.stat-card h3 {
    font-size: 2rem;
    margin-bottom: 0.5rem;
    color: #2c3e50;
}

.stat-card p {
    color: #7f8c8d;
    font-size: 0.9rem;
}

.stat-card.success {
    border-left-color: #27ae60;
}

.stat-card.warning {
    border-left-color: #f39c12;
}

.stat-card.danger {
    border-left-color: #e74c3c;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    background: #3498db;
    color: white;
    text-decoration: none;
    border-radius: 4px;
    border: none;
    cursor: pointer;
    font-size: 0.9rem;
    transition: all 0.3s;
}

.btn:hover {
    background: #2980b9;
    transform: translateY(-1px);
}

.btn-success {
    background: #27ae60;
}

.btn-success:hover {
    background: #229954;
}

.btn-warning {
    background: #f39c12;
}

.btn-warning:hover {
    background: #e67e22;
}

.btn-danger {
    background: #e74c3c;
}

.btn-danger:hover {
    background: #c0392b;
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.8rem;
}

/* Forms */
.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: #2c3e50;
}

.form-control {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 0.9rem;
    transition: border-color 0.3s;
}

.form-control:focus {
    outline: none;
    border-color: #3498db;
    box-shadow: 0 0 0 2px rgba(52, 152, 219, 0.2);
}

.form-check {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* Tables */
.table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 1rem;
}

.table th,
.table td {
    padding: 0.75rem;
    text-align: left;
    border-bottom: 1px solid #ddd;
}

.table th {
    background: #f8f9fa;
    font-weight: 600;
    color: #2c3e50;
}

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

/* Status badges */
.badge {
    display: inline-block;
    padding: 0.25rem 0.5rem;
    background: #6c757d;
    color: white;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
}

.badge-success {
    background: #28a745;
}

.badge-warning {
    background: #ffc107;
    color: #212529;
}

.badge-danger {
    background: #dc3545;
}

.badge-info {
    background: #17a2b8;
}

/* Alerts */
.alert {
    padding: 0.75rem 1rem;
    margin-bottom: 1rem;
    border-radius: 4px;
    border: 1px solid transparent;
}

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

.alert-danger {
    background: #f8d7da;
    border-color: #f5c6cb;
    color: #721c24;
}

/* Login Form */
.login-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.login-card {
    background: white;
    padding: 3rem;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.3);
    width: 100%;
    max-width: 400px;
}

.login-card h1 {
    text-align: center;
    margin-bottom: 2rem;
    color: #2c3e50;
}

.login-card .btn {
    width: 100%;
    margin-top: 1rem;
}

/* Responsive */
@media (max-width: 768px) {
    .admin-nav {
        flex-direction: column;
        gap: 1rem;
    }
    
    .admin-nav ul {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .table-responsive {
        overflow-x: auto;
    }
}

/* Payment Link Generator */
.payment-form {
    background: white;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    margin-bottom: 2rem;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem;
    margin-bottom: 1rem;
}

.product-selector {
    border: 2px dashed #ddd;
    padding: 2rem;
    text-align: center;
    border-radius: 8px;
    margin: 1rem 0;
    transition: all 0.3s;
}

.product-selector:hover {
    border-color: #3498db;
    background: #f8f9fa;
}

.selected-products {
    margin-top: 1rem;
}

.product-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    background: #f8f9fa;
    border-radius: 4px;
    margin-bottom: 0.5rem;
}

.product-item .remove-btn {
    background: #e74c3c;
    color: white;
    border: none;
    border-radius: 50%;
    width: 24px;
    height: 24px;
    cursor: pointer;
    font-size: 12px;
}

/* Loading */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid #f3f3f3;
    border-top: 3px solid #3498db;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}