body {
    margin: 40px 0 40px 0 !important;
    padding: 0 !important;
    border: none !important;
    outline: none !important;
    /* background-color: #eee; */
    background-color: #0066cc !important;
    box-shadow: none !important;
    font-family: 'Montserrat', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif !important;
}

main {
    background-color: white;
    padding: 10px 40px 40px 40px;
    display: block;
    text-align: left;
    max-width: 500px;
    margin: auto;
    border-radius: 10px;
}

header {
    text-align: center;
}

h1 {
    font-size: 40px;
    color: #191516;
    font-weight: bold;
}

form {
    display: flex;
    flex-direction: column;
    font-size: 22px;
}

#nome_utente, #password_utente {
    outline: none;
    width: 100%;
    padding: 7px;
    font-size: 16px;
    border: 1px solid #dee2e6;
    border-radius: 3px;
    background-color: white;
    box-sizing: border-box;
}

.form-group {
    padding: 8px 0;
    margin-bottom: 2px;
}

.form-group>label {
    margin-bottom: 8px;
    color: #191516;
    display: block;
    font-weight: 500;
}

button {
    width: 100%;
    display: block;
    height: 40px;
    background-color: #191516;
    border: none;
    font-weight: bold;
    font-size: 20px;
    color: white;
    box-sizing: border-box;
}

@media (max-width: 540px) {
    main {
        max-width: 380px;
    }
}
@media (max-width: 460px) {
    main {
        max-width: 280px;
    }
    h1 {
        font-size: 32px;
    }
    form {
        font-size: 18px;
    }
    #cod_meccanografico {
        font-size: 15px;
    }
}

@media (max-width: 375px) {
    main {
        max-width: 260px;
        padding: 10px 30px 30px 40px;
    }
    h1 {
        font-size: 28px;
    }

    form {
        font-size: 15px;
    }
    #cod_meccanografico {
        font-size: 12px;
    }

    button {
        font-size: 18px;
    }
}

@media (max-width: 320px) {
    main {
        max-width: 220px;
    }
}

@media (max-width: 280px) {
    main {
        max-width: 180px;
    }
}