body {
    font-family: 'Helvetica Neue', Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #ffffff;
    color: #444;
    line-height: 1.6;
}
header {
    background-color: #eeeeee;
    padding: 1rem;
    text-align: center;
    font-size: 1.2rem;
    font-weight: 600;
    border-top: 1px solid #ddd;
}

@media (max-width: 768px) {
    header {
        font-size:0.8rem;
    }
}
main {
    padding: 2rem;
    text-align: center;
}
footer {
    background-color: #f9f9f9;
    color: #444;
    text-align: center;
    padding: 0.5rem;
    font-size: 0.9rem;
    position: fixed;
    bottom: 0;
    width: 100%;
    border-top: 1px solid #ddd;
}
.block-container {
    margin: 2rem auto;
    max-width: 500px;
    background: #f9f9f9;
    padding: 1.5rem;
    border-radius: 12px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}
.block-image {
    max-width: 100%;
    border-radius: 12px;
    margin-bottom: 1rem;
}