body {
    font-family: Arial, sans-serif;
    text-align: center;
    background: #f4f4f4;
    margin: 0;
    padding: 0;
}

h1 {
    padding: 20px;
    background-color: #333;
    color: white;
    margin-bottom: 0;
}

.controls {
    padding: 15px;
    background: #ddd;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 8px;
}

.controls select,
.controls button,
.controls input {
    margin: 0 5px;
    padding: 8px;
    font-size: 14px;
}

#legend {
    margin: 10px;
    font-size: 14px;
}

.legend-item {
    display: inline-block;
    width: 15px;
    height: 15px;
    margin: 0 5px;
}

.legend-item.red {
    background-color: red;
}

.legend-item.green {
    background-color: green;
}

#metrics {
    margin: 10px;
    font-weight: bold;
    color: #222;
}

#array-container {
    display: flex;
    align-items: flex-end;
    justify-content: center;
    height: 400px;
    margin: 20px auto;
    padding: 10px;
    border: 2px solid #333;
    background-color: white;
}

.bar {
    background-color: blue;
    margin: 0 1px;
    transition: height 0.2s, background-color 0.2s;
}