body {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
    background-color: #f0f0f0;
    font-family: Arial, sans-serif;
}

.converter {
    border: 1px solid #ccc;
    padding: 20px;
    border-radius: 10px;
    background-color: #fff;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    width: 300px;
}

.category, .units, .input, .result {
    margin-bottom: 20px;
}

select, input, button {
    width: 100%;
    padding: 10px;
    margin-top: 5px;
    border: 1px solid #ccc;
    border-radius: 5px;
}

button {
    background-color: #ff9500;
    color: white;
    cursor: pointer;
}

button:hover {
    background-color: #e08900;
}