.main {
    background-color: pink;
    width: 90%;
    margin-left: 5%;
    margin-right: 5%;
    margin-top: 5%;
    box-shadow: 0px 0px 25px 25px pink;
    transition: background-color;
    transition-duration: 10s;
}
.main:hover {
    background-color: darkred;
}
h1 {
    padding: 0;
    color: darkorange;
    text-align: center;
    margin-top: 2%;
    margin-bottom: 2%;
    transition: font-size, color;
    transition-duration: 10s;
}
h1:hover {
    font-size: 128pt;
    color: lightblue;
}
#how { 
    color: blue;
    margin-top: 0%;
    text-align: center;
    transition: margin-top;
    transition-duration: 10s;
}
body {
    background-color: pink;
    font-family: sans-serif;
    transition: background-color;
    transition-duration: 10s;
}
body:hover {
    background-color: black;
}
.card {
    margin-left: auto;
    margin-right: auto;
    width: 100px;
    height: 150px;
    border: 1px solid pink;
    background-color: transparent;
}
.inner {
    position: relative;
    text-align: center;
    width: 100%;
    height: 100%;
}
.front {
    opacity: 0.0;
    position: absolute;
    width: 100%;
    height: 100%;
    background-color: black;
    font-family: Lucida script serif;
    color: orange;
    transition: opacity;
    transition-duration: 0.3s;
}
.front:hover {
    opacity: 1.0;
}
summary {
    margin-top: 1%;
    text-align: center;
}
h3 {
    margin-top: 1%;
    text-align: center;
    transition: font-size;
    transition-duration: 10s;
}
h3:hover {
    font-size: 200pt;
}
.touch {
    color: #454545;
    text-align: center;
    transition: font-weight;
    transition-duration: 1s;
}
.touch:hover {
    font-weight: bold;
}
button {
    width: auto;
    margin-left: auto;
    margin-right: auto;
}