body {
    font-family: 'Inter', sans-serif;
    margin: 0;
    padding: 0;
    background-image: url('https://cdn.isolumia.com/wbackground.jpg');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    background-attachment: fixed;
    overflow-x: hidden;
    color: white;
    line-height: 1.6;
    min-height: 100vh;
}

.container {
    width: 90%;
    max-width: 650px;
    margin: 0 auto;
    padding: 130px 0;
}

.product-header {
    text-align: center;
    margin-bottom: 40px;
}

.product-header h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
    background-color: #00eeff;
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.product-header p {
    font-size: 1.1rem;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 20px;
}

.purchase-container {
    background-color: rgba(11, 13, 19, 0.8);
    border: 1px solid rgba(35, 182, 193, 0.3);
    border-radius: 15px;
    padding: 30px;
    backdrop-filter: blur(10px);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
}

.duration-options {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 15px;
    margin-bottom: 60px;
}

.duration-option {
    background-color: rgba(23, 25, 35, 0.6);
    border: 2px solid rgba(21, 128, 136, 0.2);
    border-radius: 10px;
    padding: 20px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
}

.duration-option:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 15px rgba(35, 182, 193, 0.2);
}

.duration-option.selected {
    background-color: rgba(35, 182, 193, 0.2);
    border-color: #23b6c1;
    box-shadow: 0 0 20px rgba(35, 182, 193, 0.3);
}

.duration-option h3 {
    font-size: 1.2rem;
    margin-bottom: 10px;
}

.duration-option .price {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 5px;
    color: #00eeff;
}

.duration-option .description {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.6);
}

.purchase-btn {
    display: block;
    width: 100%;
    padding: 15px;
    border-radius: 8px;
    background: #23b6c1;
    color: white;
    font-weight: 600;
    text-decoration: none;
    text-align: center;
    font-size: 1.1rem;
    border: none;
    cursor: pointer;
    transition: all 0.3s ease;
}

.purchase-btn:disabled {
    background: rgba(35, 182, 193, 0.5);
    cursor: not-allowed;
    opacity: 0.7;
}

.purchase-btn:not(:disabled):hover {
    background: #1ea3ab;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(35, 182, 193, 0.4);
}

.support-note {
    background-color: rgba(88, 101, 242, 0.2);
    border: 1px solid rgba(88, 101, 242, 0.3);
    border-radius: 8px;
    padding: 15px;
    margin-top: 30px;
    text-align: center;
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.8);
}

.support-note a {
    color: #5865F2;
    text-decoration: none;
    font-weight: 500;
}

.support-note a:hover {
    text-decoration: underline;
}

.product-selector {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.product-btn {
    background-color: rgba(23,25,35,0.6);
    border: 2px solid rgba(21,128,136,0.2);
    color: white;
    padding: 0.5rem 1.5rem;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.2s ease;
}

.product-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(35,182,193,0.2);
}

.product-btn.selected {
    background-color: rgba(35,182,193,0.2);
    border-color: #23b6c1;
    box-shadow: 0 0 10px rgba(35,182,193,0.3);
}


@media (max-width: 768px) {
    .duration-options {
        grid-template-columns: 1fr;
    }
    
    .container {
        width: 95%;
        padding: 20px 0;
    }
    
    .product-header h1 {
        font-size: 2rem;
    }
}