yuki/styles.css

body
{
    font-family: 'Shantell Sans', cursive;
    background: url("bg.jpg") #306;
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    text-align: center;
}

@supports (background-image: url("bg.avif"))
{
    body
    {
        background-image: url("bg.avif");
    }
}

main
{
    background-color: rgba(255, 255, 255, 0.5);
    color: black;
    width: 960px;
    margin: 16px auto;
    border-radius: 1em;
    padding: 0.5em;
}

#logo
{
    background-color: transparent;
    width: 256px;
    height: 256px;
    margin: auto;
    margin-top: 6em;
    margin-bottom: 4em;
    perspective: 1000px;
}

#logo-inner
{
    position: relative;
    width: 100%;
    height: 100%;
    text-align: center;
    vertical-align: middle;
    transition: transform 0.8s;
    transform-style: preserve-3d;
}

#logo:hover #logo-inner
{
    transform: rotateY(-180deg);
}

#logo-front, #logo-back
{
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
    font-family: "Rampart One", sans-serif;
    background-color: white;
    color: black;
    border-radius: 50%;
    box-shadow: 8px 8px 0px 2px black;
    font-size: 160px;
}

#logo-back
{
    background: url("yuki.png") white;
    background-size: cover;
    transform: rotateY(180deg);
    @supports (background-image: url("yuki.avif"))
    {
        background-image: url("yuki.avif");
    }
}

#logo-back video
{
    width: 100%;
    height: 100%;
    border-radius: 50%;
}

h1
{
    font-size: 3em;
    font-weight: 600;
    margin-bottom: 0;
}

ul
{
    padding-left: 0;
    margin-top: 3em;
    margin-bottom: 3em;
}

li
{
    width: 50%;
    margin: 1em auto;
    background-color: blueviolet;
    list-style-type: none;
    border-radius: 16px;
    box-shadow: 6px 6px black;
    transition: 0.2s;
}

li:hover, button:hover, input:focus, textarea:focus
{
    transform: translate(4px, 4px);
    box-shadow: 2px 2px black;
    outline: none;
}

li a, li a:visited
{
    display: block;
    text-decoration: none;
    color: white;
    width: 100%;
    height: 100%;
    padding: 0.5em 0;
}

form
{
    text-align: left;
}

input, button, textarea
{
    width: calc(100% - 8px);
    font-family: 'Shantell Sans', cursive;
    background-color: blueviolet;
    color: white;
    border: none;
    border-radius: 8px;
    box-shadow: 6px 6px black;
    padding: 4px;
    transition: 0.2s;
}

button
{
    width: inherit;
    padding: 4px 4em;
}

textarea
{
    resize: vertical;
}

.center
{
    text-align: center;
}

footer
{
    padding-top: 2em;
}

nav a
{
    text-decoration: none;
}

nav a img
{
    box-shadow: 4px 4px black;
    transition: 0.2s;
}

nav a img:hover
{
    transform: translate(2px, 2px);
    box-shadow: 2px 2px black;
}

@media screen and (max-width: 992px) {
    main
    {
        width: calc(100% - 32px);
    }
}

@media screen and (max-width: 600px) {
    li
    {
        width: 100%;
    }
}