body{
    font-family: "Roboto", sans-serif;
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
    align-items: center;
}

.container{
    width: 90%;
    max-width: 400px;
    padding: 20px;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.6);
    text-align: center;
}

h1{
    font-size: 1.5rem;
    margin-bottom: 20px;
}

.form-group {
    margin-bottom: 15px;
}

select, button{
    width: 100%;
    padding: 12px;
    border: none;
    border-radius: 8px;
    margin-top: 10px;
    font-size: 1rem;
}

select{
    background: #2a2a2a;
    color: #fff;
    cursor: pointer;
    transition: background 0.3s ease;
}

button:hover{
    background: #e68900;
}

#result{
    margin-top: 20px;
    font-size: 1.2rem;
    font-weight: bold;
}

@media (min-width: 768px){
    .container{
        max-width: 600px;
        padding: 30px;
    }

    h1{
        font-size: 2rem;
    }
}