* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: Arial, sans-serif;
}

body {
    background: #0f172a;
    color: white;
    text-align: center;
}

nav {
    background: #1e293b;
    padding: 20px;
    font-size: 24px;
    font-weight: bold;
}

.controls {
    margin: 20px;
}

button {
    padding: 10px 20px;
    margin: 10px;
    border: none;
    border-radius: 8px;
    background: #3b82f6;
    color: white;
    cursor: pointer;
    font-size: 16px;
}

button:hover {
    background: #2563eb;
}

#array-container {
    display: flex;
    align-items: flex-end;
    justify-content: center;
    height: 400px;
    margin: 30px auto;
    width: 90%;
    border: 2px solid white;
    padding: 10px;
}

.bar {
    width: 20px;
    margin: 0 3px;
    background: #38bdf8;
    transition: 0.2s ease;
}