body {
    background: #020617;
    color: #e5e7eb;
    font-family: Arial, sans-serif;
    margin: 0;
}

.container {
    max-width: 600px;
    margin: 60px auto;
    text-align: center;
    padding: 20px;
}

h1 {
    color: #38bdf8;
}

.subtitle {
    color: #94a3b8;
    margin-bottom: 20px;
}

select, input, button {
    width: 100%;
    padding: 12px;
    margin-top: 10px;
    border-radius: 6px;
    border: none;
    font-size: 16px;
}

button {
    background: #38bdf8;
    cursor: pointer;
    font-weight: bold;
}

button:hover {
    background: #0ea5e9;
}

.card {
    background: #020617;
    border: 1px solid #1e293b;
    margin-top: 25px;
    padding: 20px;
    border-radius: 10px;
}

.hidden {
    display: none;
}

canvas {
    margin-top: 20px;
}