body {
    font-family: Arial, sans-serif;
    max-width: 600px;
    margin: 50px auto;
    padding: 20px;
}
.converter {
    background-color: #f5f5f5;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}
input {
    width: 100%;
    padding: 10px;
    margin: 10px 0;
    border: 1px solid #ddd;
    border-radius: 4px;
}
button {
    background-color: #4CAF50;
    color: white;
    padding: 10px 20px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
}
button:hover {
    background-color: #45a049;
}
#result {
    margin-top: 20px;
    font-size: 1.2em;
}
.loading {
    display: none;
    margin-top: 10px;
}
.error {
    color: #d9534f;
}