.pressure-converter {
    max-width: 500px;
    background: #f4f4f4;
    padding: 20px;
    margin: 20px auto;
    border-radius: 10px;
    box-shadow: 0 0 8px #ccc;
    font-family: Arial, sans-serif;
}
.pressure-converter h3 {
    text-align: center;
    margin-bottom: 15px;
}
.pressure-converter label {
    display: block;
    margin-bottom: 10px;
}
.pressure-converter input,
.pressure-converter select {
    width: 100%;
    padding: 6px;
    margin-top: 5px;
}
.pressure-converter button {
    width: 100%;
    padding: 10px;
    background-color: #0073aa;
    color: white;
    border: none;
    margin-top: 10px;
    cursor: pointer;
}
.pressure-converter button:hover {
    background-color: #005d8f;
}
#pressure-result {
    margin-top: 15px;
    padding: 10px;
    background-color: #eef;
    border-radius: 6px;
}