body {
    background: linear-gradient(-45deg, rgb(172, 250, 227), rgb(172, 243, 255));
}

#center {
    margin: 2%;
    padding: 2%;
    border-radius: 2em;
    background-color: white;
    opacity: 0.7;
}

#title {
    font-weight: bold;
}

big {
    font-size: 20px;
}

#NTUST {
    width: 9.87%;
}

#angry {
    font-size: 200%;
    vertical-align: top;
}