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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f8f9fa;
}

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

/* Header */
.header {
    background: #2c3e50;
    color: white;
    padding: 1rem 0;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.header h1 {
    font-size: 1.8rem;
    font-weight: 600;
}

.header a {
    color: white;
    text-decoration: none;
}

/* Navigace */
.nav {
    background: #34495e;
    padding: 0.5rem 0;
}

.nav ul {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
}

.nav li {
    position: relative;
}

.nav a {
    color: white;
    text-decoration: none;
    padding: 0.75rem 1rem;
    display: block;
    transition: background 0.3s;
}

.nav a:hover {
    background: #2c3e50;
}

.nav .dropdown {
    position: absolute;
    top: 100%;
    left: 0;
    background: #2c3e50;
    min-width: 200px;
    display: none;
    z-index: 1000;
}

.nav li:hover .dropdown {
    display: block;
}

/* Košík info */
.cart-info {
    position: fixed;
    top: 20px;
    right: 20px;
    background: #e74c3c;
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 25px;
    text-decoration: none;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0,0,0,0.2);
}

.cart-info:hover {
    background: #c0392b;
    color: white;
}

/* Main content */
.main {
    padding: 2rem 0;
    min-height: 60vh;
}

/* Produkty grid */
.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.product-card {
    background: white;
    border-radius: 8px;
    padding: 1.5rem;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    transition: transform 0.3s, box-shadow 0.3s;
}

.product-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 20px rgba(0,0,0,0.15);
}

.product-card h3 {
    color: #2c3e50;
    margin-bottom: 0.5rem;
    font-size: 1.2rem;
}

.product-card .price {
    color: #e74c3c;
    font-weight: bold;
    font-size: 1.1rem;
    margin: 0.5rem 0;
}

.product-card .description {
    color: #666;
    margin-bottom: 1rem;
    font-size: 0.9rem;
}

/* Tlačítka */
.btn {
    display: inline-block;
    padding: 0.7rem 1.5rem;
    background: #3498db;
    color: white;
    text-decoration: none;
    border-radius: 5px;
    border: none;
    cursor: pointer;
    font-size: 0.9rem;
    transition: background 0.3s;
}

.btn:hover {
    background: #2980b9;
    color: white;
}

.btn-primary {
    background: #3498db;
}

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

.btn-danger {
    background: #e74c3c;
}

.btn-warning {
    background: #f39c12;
}

.btn-secondary {
    background: #6c757d;
}

.btn-sm {
    padding: 0.4rem 0.8rem;
    font-size: 0.8rem;
}

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

.form-group label {
    display: block;
    margin-bottom: 0.3rem;
    font-weight: 500;
}

.form-control {
    width: 100%;
    padding: 0.7rem;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 1rem;
}

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

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

/* Košík */
.cart-table {
    width: 100%;
    background: white;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

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

.cart-table th {
    background: #f8f9fa;
    font-weight: 600;
}

.cart-total {
    background: white;
    padding: 2rem;
    border-radius: 8px;
    margin-top: 2rem;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

/* Alert zprávy */
.alert {
    padding: 1rem 1.5rem;
    margin-bottom: 1rem;
    border-radius: 5px;
}

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

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

.alert-info {
    background: #cce7ff;
    color: #004085;
    border: 1px solid #b3d7ff;
}

/* Footer */
.footer {
    background: #2c3e50;
    color: white;
    text-align: center;
    padding: 2rem 0;
    margin-top: 3rem;
}

/* Responsive */
@media (max-width: 768px) {
    .nav ul {
        flex-direction: column;
    }
    
    .nav .dropdown {
        position: static;
        display: block;
        margin-left: 1rem;
    }
    
    .products-grid {
        grid-template-columns: 1fr;
    }
    
    .cart-info {
        position: static;
        margin-bottom: 1rem;
        display: inline-block;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
}

/* Detail produktu */
.product-detail {
    background: white;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.product-detail .price {
    font-size: 1.5rem;
    color: #e74c3c;
    font-weight: bold;
    margin: 1rem 0;
}

/* Kalkulačka dobíjení */
.credit-calculator {
    background: #f8f9fa;
    padding: 1.5rem;
    border-radius: 8px;
    margin: 1rem 0;
    border: 2px solid #3498db;
}

.credit-result {
    background: #e8f5e8;
    padding: 1rem;
    border-radius: 5px;
    margin-top: 1rem;
    font-weight: bold;
    color: #27ae60;
}

/* Varianty produktu */
.product-variants {
    margin: 1rem 0;
}

.variant-option {
    margin: 0.5rem 0;
}

.variant-option input[type="radio"] {
    margin-right: 0.5rem;
}

.variant-option label {
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 5px;
    transition: background 0.3s;
}

.variant-option label:hover {
    background: #f8f9fa;
}

/* Platební metody */
.payment-methods {
    margin: 1rem 0;
}

.payment-option {
    border: 2px solid #e9ecef;
    border-radius: 8px;
    margin: 0.5rem 0;
    padding: 1rem;
    transition: border-color 0.3s;
}

.payment-option:hover {
    border-color: #3498db;
}

.payment-option input[type="radio"] {
    margin-right: 0.5rem;
}

.payment-option input[type="radio"]:checked + strong {
    color: #3498db;
}

.payment-option label {
    cursor: pointer;
    margin-bottom: 0;
    display: block;
}

.payment-option small {
    display: block;
    color: #666;
    margin-top: 0.25rem;
    margin-left: 1.5rem;
}

.payment-option input[type="radio"]:disabled + strong {
    color: #999;
}

.payment-option:has(input[type="radio"]:disabled) {
    opacity: 0.6;
    cursor: not-allowed;
}

.payment-info {
    background: #f8f9fa;
    border-radius: 8px;
    padding: 1rem;
    margin: 1rem 0;
    border-left: 4px solid #3498db;
}

.payment-details h4 {
    margin-top: 0;
    color: #2c3e50;
}