/**
 * Frontend Styles for MD Product Upgrades
 * Green & Black Theme
 */
.md-upgrades-container {
    margin: 20px 0;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
}

.md-upgrades-title {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 20px;
    color: #000000;
    text-align: right;
}

.md-upgrades-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
    margin-bottom: 20px;
}

.md-upgrade-card {
    background: #ffffff;
    border: 2px solid #000000;
    border-radius: 12px;
    padding: 20px;
    transition: all 0.3s ease;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.md-upgrade-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: #10b981;
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.md-upgrade-card:hover {
    border-color: #10b981;
    box-shadow: 0 10px 25px rgba(16, 185, 129, 0.2);
    transform: translateY(-2px);
}

.md-upgrade-card:hover::before {
    transform: scaleX(1);
}

.md-upgrade-card input[type="checkbox"],
.md-upgrade-card input[type="radio"] {
    position: absolute;
    opacity: 0;
    pointer-events: none;
}

.md-upgrade-card input[type="checkbox"]:checked + .md-upgrade-content,
.md-upgrade-card input[type="radio"]:checked + .md-upgrade-content {
    border-color: #10b981;
    background: #f0fdf4;
}

.md-upgrade-card input[type="checkbox"]:checked + .md-upgrade-content .md-upgrade-check,
.md-upgrade-card input[type="radio"]:checked + .md-upgrade-content .md-upgrade-check {
    display: flex;
}

.md-upgrade-content {
    position: relative;
    border: 2px solid transparent;
    border-radius: 8px;
    padding: 15px;
    transition: all 0.3s ease;
}

.md-upgrade-check {
    position: absolute;
    top: 10px;
    left: 10px;
    width: 24px;
    height: 24px;
    background: #10b981;
    border-radius: 50%;
    display: none;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 14px;
    font-weight: bold;
}

.md-upgrade-check::before {
    content: '✓';
}

.md-upgrade-name {
    font-size: 18px;
    font-weight: 600;
    color: #000000;
    margin-bottom: 10px;
    text-align: right;
}

.md-upgrade-price {
    font-size: 24px;
    font-weight: 700;
    color: #10b981;
    margin-bottom: 8px;
    text-align: right;
}

.md-upgrade-price .currency {
    font-size: 16px;
    color: #000000;
    margin-left: 4px;
}

.md-upgrade-duration {
    font-size: 14px;
    color: #000000;
    margin-top: 8px;
    text-align: right;
    display: flex;
    align-items: center;
    gap: 5px;
}

.md-upgrade-duration::before {
    content: '⏱';
    font-size: 16px;
}

.md-upgrade-total {
    background: #000000;
    color: #ffffff;
    padding: 20px;
    border-radius: 12px;
    margin-top: 20px;
    text-align: center;
    font-size: 22px;
    font-weight: 600;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
    border: 2px solid #10b981;
}

.md-upgrade-total-label {
    font-size: 14px;
    opacity: 0.9;
    margin-bottom: 8px;
    display: block;
    color: #10b981;
}

.md-upgrade-total-price {
    font-size: 32px;
    font-weight: 700;
    color: #10b981;
}

/* No upgrade option */
.md-upgrade-card.no-upgrade {
    border-color: #000000;
    background: #ffffff;
}

.md-upgrade-card.no-upgrade:hover {
    border-color: #10b981;
    box-shadow: 0 5px 15px rgba(16, 185, 129, 0.15);
}

.md-upgrade-card.no-upgrade .md-upgrade-name {
    color: #000000;
}

.md-upgrade-card.no-upgrade .md-upgrade-price {
    color: #10b981;
}

/* Responsive */
@media (max-width: 768px) {
    .md-upgrades-grid {
        grid-template-columns: 1fr;
    }
    
    .md-upgrade-card {
        padding: 15px;
    }
    
    .md-upgrade-name {
        font-size: 16px;
    }
    
    .md-upgrade-price {
        font-size: 20px;
    }
}

/* Animation */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.md-upgrade-card {
    animation: fadeIn 0.4s ease forwards;
}

.md-upgrade-card:nth-child(1) { animation-delay: 0.1s; }
.md-upgrade-card:nth-child(2) { animation-delay: 0.2s; }
.md-upgrade-card:nth-child(3) { animation-delay: 0.3s; }
.md-upgrade-card:nth-child(4) { animation-delay: 0.4s; }