body {
    font-family: Arial, sans-serif;
    line-height: 1.5;
    margin: 0;
    padding: 0;
    background: #f4f4f4;
    color: #333;
}
@media (prefers-color-scheme: dark) {
    body {
        background: #1d1b1d;
        color: #eee;
    }
}
header {
    text-align: center;
    padding: 20px;
}
header img {
    width: 150px;
}
main {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 4px;
    max-width: 1200px;
    margin: 0 auto;
    padding-bottom: 100px;
}
button {
    border: none;
    padding: 10px;
    cursor: pointer;
    width: 10rem;
    height: 4rem;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    transition: transform 0.2s, box-shadow 0.2s;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}
button:hover {
    transform: scale(1.1);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}
span.copied {
    display: none;
}
button.copied > span.copied {
    display: inline;
}
.name {
    font-weight: bold;
    font-size: 0.8rem;
}
.hex {
    font-family: monospace;
    font-size: 0.6rem;
}