iframe {
    width: 100%;
    height: 400px;
    border: 0;
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}
:root {
    --bg: hsl(90,90%,20%);
    --fg: hsl(223,10%,10%);
    font-size: calc(16px + (24 - 16) * (100vw - 320px) / (1280 - 320));
}
body {
    background: var(--bg);
    color: var(--fg);
    font: 1em/1.5 sans-serif;
    height: 100vh;
    display: grid;
    place-items: center;
}
.wheel-and-hamster {
    --dur: 1s;
    position: relative;
    width: 12em;
    height: 12em;
}
.wheel,
.hamster,
.hamster div,
.spoke {
    position: absolute;
}
.wheel,
.spoke {
    border-radius: 50%;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}
.wheel {
    background: radial-gradient(100% 100% at center,hsla(0,0%,60%,0) 47.8%,hsl(0,0%,60%) 48%);
    z-index: 2;
}
.hamster {
    animation: hamster var(--dur) ease-in-out infinite;
    top: 50%;
    left: calc(50% - 3.5em);
    width: 7em;
    height: 3.75em;
    transform: rotate(4deg) translate(-0.8em,1.85em);
    transform-origin: 50% 0;
    z-index: 1;
}
.hamster__head {
    animation: hamsterHead var(--dur) ease-in-out infinite;
    background: hsl(30,90%,55%);
    border-radius: 70% 30% 0 100% / 40% 25% 25% 60%;
    box-shadow:
            0 -0.25em 0 hsl(30,90%,80%) inset,
            0.75em -1.55em 0 hsl(30,90%,90%) inset;
    top: 0;
    left: -2em;
    width: 2.75em;
    height: 2.5em;
    transform-origin: 100% 50%;
}
.hamster__ear {
    animation: hamsterEar var(--dur) ease-in-out infinite;
    background: hsl(0,90%,85%);
    border-radius: 50%;
    box-shadow: -0.25em 0 hsl(30,90%,55%) inset;
    top: -0.25em;
    right: -0.25em;
    width: 0.75em;
    height: 0.75em;
    transform-origin: 50% 75%;
}
.hamster__eye {
    animation: hamsterEye var(--dur) linear infinite;
    background-color: hsl(0,0%,0%);
    border-radius: 50%;
    top: 0.375em;
    left: 1.25em;
    width: 0.5em;
    height: 0.5em;
}
.hamster__nose {
    background: hsl(0,90%,75%);
    border-radius: 35% 65% 85% 15% / 70% 50% 50% 30%;
    top: 0.75em;
    left: 0;
    width: 0.2em;
    height: 0.25em;
}
.hamster__body {
    animation: hamsterBody var(--dur) ease-in-out infinite;
    background: hsl(30,90%,90%);
    border-radius: 50% 30% 50% 30% / 15% 60% 40% 40%;
    box-shadow:
            0.1em 0.75em 0 hsl(30,90%,55%) inset,
            0.15em -0.5em 0 hsl(30,90%,80%) inset;
    top: 0.25em;
    left: 2em;
    width: 4.5em;
    height: 3em;
    transform-origin: 17% 50%;
    transform-style: preserve-3d;
}
.hamster__limb--fr,
.hamster__limb--fl {
    clip-path: polygon(0 0,100% 0,70% 80%,60% 100%,0% 100%,40% 80%);
    top: 2em;
    left: 0.5em;
    width: 1em;
    height: 1.5em;
    transform-origin: 50% 0;
}
.hamster__limb--fr {
    animation: hamsterFRLimb var(--dur) linear infinite;
    background: linear-gradient(hsl(30,90%,80%) 80%,hsl(0,90%,75%) 80%);
    transform: rotate(15deg) translateZ(-1px);
}
.hamster__limb--fl {
    animation: hamsterFLLimb var(--dur) linear infinite;
    background: linear-gradient(hsl(30,90%,90%) 80%,hsl(0,90%,85%) 80%);
    transform: rotate(15deg);
}
.hamster__limb--br,
.hamster__limb--bl {
    border-radius: 0.75em 0.75em 0 0;
    clip-path: polygon(0 0,100% 0,100% 30%,70% 90%,70% 100%,30% 100%,40% 90%,0% 30%);
    top: 1em;
    left: 2.8em;
    width: 1.5em;
    height: 2.5em;
    transform-origin: 50% 30%;
}
.hamster__limb--br {
    animation: hamsterBRLimb var(--dur) linear infinite;
    background: linear-gradient(hsl(30,90%,80%) 90%,hsl(0,90%,75%) 90%);
    transform: rotate(-25deg) translateZ(-1px);
}
.hamster__limb--bl {
    animation: hamsterBLLimb var(--dur) linear infinite;
    background: linear-gradient(hsl(30,90%,90%) 90%,hsl(0,90%,85%) 90%);
    transform: rotate(-25deg);
}
.hamster__tail {
    animation: hamsterTail var(--dur) linear infinite;
    background: hsl(0,90%,85%);
    border-radius: 0.25em 50% 50% 0.25em;
    box-shadow: 0 -0.2em 0 hsl(0,90%,75%) inset;
    top: 1.5em;
    right: -0.5em;
    width: 1em;
    height: 0.5em;
    transform: rotate(30deg) translateZ(-1px);
    transform-origin: 0.25em 0.25em;
}
.spoke {
    animation: spoke var(--dur) linear infinite;
    background:
            radial-gradient(100% 100% at center,hsl(0,0%,60%) 4.8%,hsla(0,0%,60%,0) 5%),
            linear-gradient(hsla(0,0%,55%,0) 46.9%,hsl(0,0%,65%) 47% 52.9%,hsla(0,0%,65%,0) 53%) 50% 50% / 99% 99% no-repeat;
}

/* Animations */
@keyframes hamster {
    from, to { transform: rotate(4deg) translate(-0.8em,1.85em); }
    50% { transform: rotate(0) translate(-0.8em,1.85em); }
}
@keyframes hamsterHead {
    from, 25%, 50%, 75%, to { transform: rotate(0); }
    12.5%, 37.5%, 62.5%, 87.5% { transform: rotate(8deg); }
}
@keyframes hamsterEye {
    from, 90%, to { transform: scaleY(1); }
    95% { transform: scaleY(0); }
}
@keyframes hamsterEar {
    from, 25%, 50%, 75%, to { transform: rotate(0); }
    12.5%, 37.5%, 62.5%, 87.5% { transform: rotate(12deg); }
}
@keyframes hamsterBody {
    from, 25%, 50%, 75%, to { transform: rotate(0); }
    12.5%, 37.5%, 62.5%, 87.5% { transform: rotate(-2deg); }
}
@keyframes hamsterFRLimb {
    from, 25%, 50%, 75%, to { transform: rotate(50deg) translateZ(-1px); }
    12.5%, 37.5%, 62.5%, 87.5% { transform: rotate(-30deg) translateZ(-1px); }
}
@keyframes hamsterFLLimb {
    from, 25%, 50%, 75%, to { transform: rotate(-30deg); }
    12.5%, 37.5%, 62.5%, 87.5% { transform: rotate(50deg); }
}
@keyframes hamsterBRLimb {
    from, 25%, 50%, 75%, to { transform: rotate(-60deg) translateZ(-1px); }
    12.5%, 37.5%, 62.5%, 87.5% { transform: rotate(20deg) translateZ(-1px); }
}
@keyframes hamsterBLLimb {
    from, 25%, 50%, 75%, to { transform: rotate(20deg); }
    12.5%, 37.5%, 62.5%, 87.5% { transform: rotate(-60deg); }
}
@keyframes hamsterTail {
    from, 25%, 50%, 75%, to { transform: rotate(30deg) translateZ(-1px); }
    12.5%, 37.5%, 62.5%, 87.5% { transform: rotate(10deg) translateZ(-1px); }
}
@keyframes spoke {
    from { transform: rotate(0); }
    to { transform: rotate(-1turn); }
}