body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #1a1a1a;
    color: #fff;
}

header {
    background-color: #333;
    padding: 1rem;
    text-align: center;
}

main {
    padding: 2rem;
}

section {
    background: #222;
    margin: 1rem 0;
    padding: 1rem;
    border-radius: 5px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.5);
}

h2 {
    margin-top: 0;
}

.controls {
    margin: 1rem 0;
}

label {
    margin-right: 1rem;
}

input[type="range"] {
    width: 200px;
}

.color-btn {
    width: 20px;
    height: 20px;
    border: none;
    margin-right: 5px;
    cursor: pointer;
    border-radius: 3px;
}

#pattern-grid {
    display: grid;
    grid-template-columns: repeat(32, 20px);
    grid-gap: 2px;
    margin-top: 1rem;
}

.grid-item {
    width: 20px;
    height: 20px;
    background-color: #444;
    cursor: pointer;
    border: 1px solid #555;
}

footer {
    background-color: #333;
    text-align: center;
    padding: 1rem;
    position: absolute;
    bottom: 0;
    width: 100%;
}