body {
    font-family: Arial, sans-serif;
    background: #f9f9f9;
    color: #333;
    margin: 0;
    padding: 20px;
}

.container {
    max-width: 600px;
    margin: auto;
    background: white;
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
}

input[type="number"], select, input[type="range"] {
    width: 100%;
    margin: 10px 0;
    padding: 10px;
    font-size: 16px;
    border-radius: 6px;
    border: 1px solid #ccc;
}

h1 {
    font-size: 24px;
    margin-bottom: 20px;
    text-align: center;
}

h2 {
    margin-top: 10px;
    color: #007BFF;
    font-size: 24px;
}

h3 {
    margin-top: 20px;
    font-size: 18px;
    color: #444;
}

.label-text {
    font-size: 16px;
    margin-top: 10px;
}

.small-text {
    font-size: 14px;
    color: #777;
}

.input-group, .output-group {
    margin-bottom: 30px;
    padding: 15px;
    border-radius: 8px;
    background: #f1f1f1;
}