#main {
    background-color: whitesmoke;
    width: 80%;
    text-align: center;
    border-radius: 15px;
    margin: 3rem auto;
    padding: 3rem 0.5rem;
}

#mainDesc {
    text-align: justify;
    font-size: 19px;
}

.input-group {
    width: 80%;
    justify-content: center;
}

#notice {
    color: #a8b0bd;
    font-size: 10px;
}

@media (max-width: 540px) {
    #main {
        width: 100%;
        margin: 1rem auto;
    }

    #mainDesc {
        font-size:17px;
    }
    
    h1 {
        font-size: 32px;
    }
}