body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    background-color: #f4f4f4;
    padding-bottom: 20px;
}

h1 {
    background-color: #4CAF50;
    color: white;
    width: 100%;
    text-align: center;
    padding: 10px 0;
    margin: 0;
}

h2 {
    color: #333;
    margin: 20px 0 10px 0;
}

p {
    padding: 0 20px;
    text-align: center;
    margin-bottom: 20px;
}

#gridCanvas {
    border: 1px solid #ccc;
    max-width: 100%;
    height: auto;
}

ul {
    list-style-type: none;
    padding: 0;
    margin: 20px 0;
    width: 80%;
}

ul li {
    background-color: #eee;
    color: #333;
    margin: 5px 0;
    padding: 10px;
    border-radius: 5px;
    text-align: center;
    transition: color 0.3s ease, background-color 0.3s ease;
}

ul li:hover {
    opacity: 0.9;
}


a button {
    background-color: #4CAF50;
    color: white;
    border: none;
    padding: 10px 20px;
    text-align: center;
    text-decoration: none;
    display: inline-block;
    font-size: 16px;
    margin: 20px 0;
    cursor: pointer;
    border-radius: 5px;
    width: 80%;
}

a button:hover {
    background-color: #45a049;
}

@media (max-width: 600px) {
    h1, p, h2, ul, a button {
        width: 100%;
    }

    #gridCanvas {
        width: 100%;
        height: auto;
    }
}
#colorGrid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
    gap: 10px;
    margin-top: 20px;
}

.color-card {
    padding: 10px;
    border-radius: 5px;
    text-align: center;
    position: relative;
}

.card-content {
    font-size: 14px;
    font-weight: bold;
}

.card-footnote {
    font-size: 12px;
    margin-top: 10px;
    color: #fff;
    background-color: rgba(0, 0, 0, 0.5);
    padding: 5px;
    border-radius: 5px;
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
}