body {
    padding-top: 50px;
    background-color: #f5f5f5;
}

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

.feature-box {
    padding: 20px;
    background: white;
    border-radius: 6px;
    margin-bottom: 20px;
    box-shadow: 0 2px 6px rgba(0,0,0,0.1);
    height: 14em;
}

.download-section {
    text-align: center;
    margin-top: 40px;
}

.btn-download {
    font-size: 20px;
    padding: 15px 40px;
}