body {
    font-family: Arial, sans-serif;
    background-color: #222;
    color: #fff;
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}
.converter {
    background: #333;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.5);
    text-align: center;
    max-width: 400px;
    width: 100%;
}
.converter h1 {
    margin-bottom: 20px;
    font-size: 24px;
    color: #fff;
}
.converter input, .converter select {
    width: 80%;
    padding: 10px;
    margin-bottom: 10px;
    border: 1px solid #444;
    border-radius: 5px;
    background: #444;
    color: #fff;
    font-size: 16px;
}
.converter button {
    background-color: #ffc107;
    color: #222;
    border: none;
    padding: 10px 15px;
    border-radius: 5px;
    font-size: 16px;
    cursor: pointer;
    font-weight: bold;
}
.converter button:hover {
    background-color: #e0a800;
}
.converter .result {
    margin-top: 15px;
    font-size: 24px;
    font-weight: bold;
    color: #ffc107;
}
.formula {
    margin-top: 10px;
    font-size: 14px;
    color: #ffc107;
    text-align: left;
}