body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    line-height: 1.6;
    color: #333;
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
    background-color: #f9f9f9;
}
header {
    text-align: center;
    margin-bottom: 40px;
    border-bottom: 1px solid #eee;
    padding-bottom: 20px;
}
h1 {
    color: #2c3e50;
    margin-bottom: 10px;
}
.services {
    display: grid;
    gap: 30px;
}
.service-item {
    background: white;
    padding: 25px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}
.purchase-btn {
    background-color: #6772e5;
    color: white;
    border: none;
    padding: 12px 20px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 16px;
    margin-top: 15px;
}
.purchase-btn:hover {
    background-color: #5469d4;
}
.hidden { display: none; }
#payment-message {
    padding: 15px;
    margin: 20px 0;
    border-radius: 4px;
    text-align: center;
}