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12 July 2025

Diagramma di Venn animato

HTML

<!DOCTYPE html>
<html lang="en" >
<head>
  <meta charset="UTF-8">
  <title>Andev Web</title>
  <link rel="stylesheet" href="./style.css">

</head>
<body>
<input type="radio" class="sr-only" name="fan" id="zero" />
    <input type="radio" class="sr-only" name="fan" id="one" checked="true" />
    <input type="radio" class="sr-only" name="fan" id="two" />
    <input type="radio" class="sr-only" name="fan" id="three" />
    <input type="checkbox" id="rotate"  class="sr-only" />
    <div class="scene">
      <div class="fan">
        <div class="fan__base">
          <div class="cuboid base">
            <div class="cuboid__side"></div>
            <div class="cuboid__side"></div>
            <div class="cuboid__side"></div>
            <div class="cuboid__side"></div>
            <div class="cuboid__side"></div>
            <div class="cuboid__side"></div>
          </div>
        </div>
        <div class="fan__controls">
          <label class="fan__control" for="zero">
            <div class="cuboid control">
              <div class="cuboid__side"></div>
              <div class="cuboid__side"></div>
              <div class="cuboid__side"></div>
              <div class="cuboid__side"></div>
              <div class="cuboid__side"></div>
              <div class="cuboid__side"></div>
            </div>
          </label>
          <label class="fan__control" for="one">
            <div class="cuboid control">
              <div class="cuboid__side"></div>
              <div class="cuboid__side"></div>
              <div class="cuboid__side"></div>
              <div class="cuboid__side"></div>
              <div class="cuboid__side"></div>
              <div class="cuboid__side"></div>
            </div>
          </label>
          <label class="fan__control" for="two">
            <div class="cuboid control">
              <div class="cuboid__side"></div>
              <div class="cuboid__side"></div>
              <div class="cuboid__side"></div>
              <div class="cuboid__side"></div>
              <div class="cuboid__side"></div>
              <div class="cuboid__side"></div>
            </div>
          </label>
          <label class="fan__control" for="three">
            <div class="cuboid control">
              <div class="cuboid__side"></div>
              <div class="cuboid__side"></div>
              <div class="cuboid__side"></div>
              <div class="cuboid__side"></div>
              <div class="cuboid__side"></div>
              <div class="cuboid__side"></div>
            </div>
          </label>
        </div>
        <div class="fan__spine">
          <div class="cuboid spine">
            <div class="cuboid__side"></div>
            <div class="cuboid__side"></div>
            <div class="cuboid__side"></div>
            <div class="cuboid__side"></div>
            <div class="cuboid__side"></div>
            <div class="cuboid__side"></div>
          </div>
        </div>
        <div class="fan__head">
          <div class="fan__rotater">
            <div class="cuboid rotater">
              <div class="cuboid__side"></div>
              <div class="cuboid__side"></div>
              <div class="cuboid__side"></div>
              <div class="cuboid__side"></div>
              <div class="cuboid__side"></div>
              <div class="cuboid__side"></div>
            </div>
            <label for="rotate" class="fan__stalk">
              <div class="cuboid stalk">
                <div class="cuboid__side"></div>
                <div class="cuboid__side"></div>
                <div class="cuboid__side"></div>
                <div class="cuboid__side"></div>
                <div class="cuboid__side"></div>
                <div class="cuboid__side"></div>
              </div>
            </label>
          </div>
          <div class="fan__barrel">
            <div class="cuboid barrel">
              <div class="cuboid__side"></div>
              <div class="cuboid__side"></div>
              <div class="cuboid__side"></div>
              <div class="cuboid__side"></div>
              <div class="cuboid__side"></div>
              <div class="cuboid__side"></div>
            </div>
          </div>
          <div class="fan__housing">
            <div class="fan__housing-rear"></div>
            <div class="fan__blades">
              <div class="fan__blade"></div>
              <div class="fan__blade"></div>
              <div class="fan__blade"></div>
            </div>
            <div class="fan__housing-front">
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</body>
</html>

CSS

@import url('https://unpkg.com/normalize.css') layer(normalize);

@layer normalize, base, demo;

@layer demo {
  *,
  *:after,
  *:before {
    transform-style: preserve-3d;
  }

:root {
    --size: 30;
    --width: calc(var(--size) * 1vmin);
    --height: calc(var(--width) * 1.75vmin);
    --blade-speed: 1;
    --rotation: 25;
    --fan-speed: 2;
    --accent: hsl(25 80% 60%);
    --state: running;
    --light: color-mix(in lch, canvas, canvasText 10%);
    --dark: color-mix(in lch, canvasText, canvas 25%);
    --color: light-dark(var(--light), var(--dark));
  }

html {
    color-scheme: light dark;
  }

[data-theme='light'] {
    color-scheme: light only;
  }

[data-theme='dark'] {
    color-scheme: dark only;
  }

body {
    overflow-x: hidden;
    background: light-dark(canvas, canvas);
  }

.fan svg {
    height: 15%;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate3d(-50%, -50%, 1px);
    filter: grayscale(1);
    opacity: 0.5;
  }

:root:has(#zero:checked) {
    --blade-speed: 0;
    --state: paused;
  }

:root:has(#one:checked) {
    --blade-speed: 1;
  }

:root:has(#one:checked) .fan__control:nth-of-type(2),
  :root:has(#two:checked) .fan__control:nth-of-type(3),
  :root:has(#three:checked) .fan__control:nth-of-type(4) {
    transition: transform 0.1s cubic-bezier(0, 1.4, 0.2, 1.4);
    transform: translate(0, 50%);
  }

:root:has(#two:checked) {
    --blade-speed: 0.5;
  }

:root:has(#three:checked) {
    --blade-speed: 0.25;
  }

/* 3D Stuff */
  .cuboid {
    width: 100%;
    height: 100%;
    position: relative;
  }

.cuboid__side {
    filter: brightness(var(--b, 1));
  }

.cuboid__side:nth-of-type(1) {
    --b: 1;
    height: calc(var(--thickness) * 1vmin);
    width: 100%;
    position: absolute;
    top: 0;
    transform: translate(0, -50%) rotateX(90deg);
  }

.cuboid__side:nth-of-type(2) {
    --b: 1;
    height: 100%;
    width: calc(var(--thickness) * 1vmin);
    position: absolute;
    top: 50%;
    right: 0;
    transform: translate(50%, -50%) rotateY(90deg);
  }

.cuboid__side:nth-of-type(3) {
    --b: 0.5;
    width: 100%;
    height: calc(var(--thickness) * 1vmin);
    position: absolute;
    bottom: 0;
    transform: translate(0%, 50%) rotateX(90deg);
  }

.cuboid__side:nth-of-type(4) {
    --b: 0.75;
    height: 100%;
    width: calc(var(--thickness) * 1vmin);
    position: absolute;
    left: 0;
    top: 50%;
    transform: translate(-50%, -50%) rotateY(90deg);
  }

.cuboid__side:nth-of-type(5) {
    --b: 0.9;
    height: 100%;
    width: 100%;
    transform: translate3d(0, 0, calc(var(--thickness) * 0.5vmin));
    position: absolute;
    top: 0;
    left: 0;
  }

.cuboid__side:nth-of-type(6) {
    --bg: 0;
    height: 100%;
    width: 100%;
    transform: translate3d(0, 0, calc(var(--thickness) * -0.5vmin))
      rotateY(180deg);
    position: absolute;
    top: 0;
    left: 0;
  }

/* Sizing */
  :root {
    --width: 30vmin;
    --height: calc(var(--width) * 1.75);
  }

label {
    cursor: pointer;
  }
  .fan__controls label {
    transition: transform 0.1s;
  }

.fan__controls label:hover {
    transform: translate(0, 20%);
  }

.fan__controls label:active {
    transform: translate(0, 40%);
  }

.scene {
    position: absolute;
    height: calc(var(--size) * 1vmin);
    width: calc(var(--size) * 1vmin);
    top: 50%;
    left: 50%;
    transform: translate3d(-50%, -50%, 0vmin) rotateX(-24deg) rotateY(34deg)
      rotateX(90deg);
  }

.fan {
    height: var(--height);
    width: var(--width);
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) rotateX(-90deg)
      rotateX(calc(var(--rotateX, 0) * 1deg))
      rotateY(calc(var(--rotateY, 0) * 1deg));
  }

.fan__base {
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translate(-50%, 0);
    height: 8%;
    width: 80%;
  }

.fan__controls {
    height: 6%;
    width: 50%;
    position: absolute;
    bottom: 6%;
    left: 50%;
    transform: translate3d(-50%, 0, calc(var(--size) * 0.3vmin));
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    grid-gap: 6%;
  }

.fan__housing {
    height: 150%;
    width: 150%;
    border-radius: 50%;
    top: 50%;
    left: 50%;
    position: absolute;
    pointer-events: none;
    transform: translate3d(-50%, -50%, calc(var(--size) * 0.45vmin));
  }

.fan__housing-rear,
  .fan__housing-front {
    position: absolute;
    top: 50%;
    left: 50%;
    height: 80%;
    width: 80%;
    border-radius: 50%;
  }

.fan__housing-front {
    transform: translate3d(-50%, -50%, calc(var(--size) * 0.11vmin));
  }

.fan__housing-front:after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    height: 35%;
    width: 35%;
    transform: translate(-50%, -50%);
    border-radius: 50%;
  }
  .fan__housing-rear {
    transform: translate3d(-50%, -50%, calc(var(--size) * -0.1vmin));
  }

.fan__head {
    height: calc(var(--size) * 1vmin);
    width: calc(var(--size) * 1vmin);
    position: absolute;
    top: 0;
    left: 0;
    transform: translate3d(0, 0, calc(var(--size) * -0.25vmin));
  }

:root:has(#one:checked, #two:checked, #three:checked):has(#rotate:checked)
    .fan__head {
    --rotate-state: running;
  }

[for='rotate']:hover {
    transform: translate(-50%, -10%);
  }

:root:has(#rotate:checked) [for='rotate'] {
    transform: translate(-50%, 20%);
  }

.fan__head {
    -webkit-animation: fan calc(var(--fan-speed, 1) * 1s)
      calc(var(--fan-speed, 1) * -0.5s) infinite alternate ease-in-out
      var(--rotate-state, paused);
            animation: fan calc(var(--fan-speed, 1) * 1s)
      calc(var(--fan-speed, 1) * -0.5s) infinite alternate ease-in-out
      var(--rotate-state, paused);
  }

.fan__rotater {
    top: 50%;
    width: calc(var(--size) * 0.2vmin);
    height: calc(var(--size) * 0.2vmin);
    position: absolute;
    left: 50%;
    transform: translate(-50%, -50%);
  }

.fan__spine {
    height: 57.5%;
    bottom: 8%;
    width: 20%;
    position: absolute;
    left: 50%;
    transform: translate3d(-50%, 0%, calc(var(--size) * -0.25vmin));
  }

.fan__stalk {
    height: 160%;
    left: 50%;
    bottom: 0;
    transform: translate(-50%, 0);
    transition: transform 0.2s cubic-bezier(0, 1.4, 0.2, 1.4);
    width: 75%;
    position: absolute;

& > div {
      width: 40%;
      left: 50%;
      translate: -50% 0;
    }
  }

.fan__blades {
    position: absolute;
    top: 50%;
    left: 50%;
    height: 16%;
    width: 16%;
    transform: translate3d(-50%, -50%, -1px) rotate(0deg);
    -webkit-animation: rotate calc(var(--blade-speed, 0) * 1s) infinite linear;
            animation: rotate calc(var(--blade-speed, 0) * 1s) infinite linear;
  }

.fan__blade {
    height: 300%;
    width: 100%;
    position: absolute;
    top: 50%;
    left: 50%;
    transform-origin: 50% 0;
    transform: translate(-50%, 0) rotate(calc(var(--rotate, 0) * 1deg));
  }

.fan__blade:nth-of-type(1) {
    --rotate: 0;
  }

.fan__blade:nth-of-type(2) {
    --rotate: calc(360 / 3 * 1);
  }

.fan__blade:nth-of-type(3) {
    --rotate: calc(360 / 3 * 2);
  }

.fan__barrel {
    height: 22.5%;
    width: 22.5%;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate3d(-50%, -50%, calc(var(--size) * 0.3vmin));
  }

.base {
    --thickness: calc(var(--size) * 0.8);
  }

.control {
    --thickness: calc(((var(--size) * 0.5) - ((var(--size) * 0.5) * 0.18)) / 3);
  }

.spine {
    --thickness: calc(var(--size) * 0.2);
  }

.rotater {
    --thickness: calc(var(--size) * 0.2);
  }

.barrel {
    --thickness: calc(var(--size) * 0.4);
  }

.stalk {
    --thickness: calc(var(--size) * 0.05);
  }

/* Colors */
  .fan__housing,
  .fan__housing-rear,
  .fan__housing-front {
    background: color-mix(in lch, var(--color), #0000 70%);
    border: 1vmin solid color-mix(in lch, var(--color), #000 15%);
  }
  .fan__housing-front::after {
    background: color-mix(in lch, var(--color), #000 5%);
  }
  .fan__blade {
    background: linear-gradient(var(--accent), var(--accent)) 50% 95% / 100% 2%
        no-repeat,
      var(--color);
  }
  .base div {
    background: var(--color);
  }
  .control div {
    background: color-mix(in lch, var(--color), #000 10%);
  }

.fan__control:nth-of-type(1) .control div {
    background: var(--accent);
  }
  .spine div {
    background: var(--color);
  }

.rotater div {
    background: var(--color);
  }
  .barrel div {
    background: var(--color);
  }

.stalk div {
    background: var(--accent);
  }

/* Animation */

@-webkit-keyframes fan {
    0%,
    5% {
      transform: translate3d(0, 0, calc(var(--width) * -0.25))
        rotateY(calc(var(--rotation, 0) * 1deg));
    }

95%,
    100% {
      transform: translate3d(0, 0, calc(var(--width) * -0.25))
        rotateY(calc(var(--rotation, 0) * -1deg));
    }
  }

@keyframes fan {
    0%,
    5% {
      transform: translate3d(0, 0, calc(var(--width) * -0.25))
        rotateY(calc(var(--rotation, 0) * 1deg));
    }

95%,
    100% {
      transform: translate3d(0, 0, calc(var(--width) * -0.25))
        rotateY(calc(var(--rotation, 0) * -1deg));
    }
  }

@-webkit-keyframes rotate {
    from {
      transform: translate3d(-50%, -50%, -1px) rotate(0deg);
    }

to {
      transform: translate3d(-50%, -50%, -1px) rotate(360deg);
    }
  }

@keyframes rotate {
    from {
      transform: translate3d(-50%, -50%, -1px) rotate(0deg);
    }

to {
      transform: translate3d(-50%, -50%, -1px) rotate(360deg);
    }
  }
}

@layer base {
  :root {
    --font-size-min: 16;
    --font-size-max: 20;
    --font-ratio-min: 1.2;
    --font-ratio-max: 1.33;
    --font-width-min: 375;
    --font-width-max: 1500;
  }

:where(.fluid) {
    --fluid-min: calc(
      var(--font-size-min) * pow(var(--font-ratio-min), var(--font-level, 0))
    );
    --fluid-max: calc(
      var(--font-size-max) * pow(var(--font-ratio-max), var(--font-level, 0))
    );
    --fluid-preferred: calc(
      (var(--fluid-max) - var(--fluid-min)) /
        (var(--font-width-max) - var(--font-width-min))
    );
    --fluid-type: clamp(
      (var(--fluid-min) / 16) * 1rem,
      ((var(--fluid-min) / 16) * 1rem) -
        (((var(--fluid-preferred) * var(--font-width-min)) / 16) * 1rem) +
        (var(--fluid-preferred) * var(--variable-unit, 100vi)),
      (var(--fluid-max) / 16) * 1rem
    );
    font-size: var(--fluid-type);
  }

*,
  *:after,
  *:before {
    box-sizing: border-box;
  }

body {
    display: grid;
    place-items: center;
    min-height: 100vh;
    font-family: 'SF Pro Text', 'SF Pro Icons', 'AOS Icons', 'Helvetica Neue',
      Helvetica, Arial, sans-serif, system-ui;
  }

body::before {
    --size: 45px;
    --line: color-mix(in lch, canvasText, transparent 70%);
    content: '';
    height: 100vh;
    width: 100vw;
    position: fixed;
    background: linear-gradient(
          90deg,
          var(--line) 1px,
          transparent 1px var(--size)
        )
        50% 50% / var(--size) var(--size),
      linear-gradient(var(--line) 1px, transparent 1px var(--size)) 50% 50% /
        var(--size) var(--size);
    -webkit-mask: linear-gradient(-20deg, transparent 50%, white);
            mask: linear-gradient(-20deg, transparent 50%, white);
    top: 0;
    transform-style: flat;
    pointer-events: none;
    z-index: -1;
  }

.bear-link {
    color: canvasText;
    position: fixed;
    top: 1rem;
    left: 1rem;
    width: 48px;
    aspect-ratio: 1;
    display: grid;
    place-items: center;
    opacity: 0.8;
  }

:where(.x-link, .bear-link):is(:hover, :focus-visible) {
    opacity: 1;
  }

.bear-link svg {
    width: 75%;
  }

/* Utilities */
  .sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
  }
}

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