#sponsors .col-12 {
    padding-left: 0;
    padding-right: 0;
}

#sponsors img {
    border-radius: 6px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

#sponsors img:hover {
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.letter-group {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.5em 1em;
    margin-bottom: 2em;
}

.letter-header {
    grid-column: 1 / -1;
    font-weight: bold;
    font-size: 1.2em;
    margin-top: 1em;
    border-bottom: 2px solid #ccc;
    padding-bottom: 0.2em;
}