CSS Fly

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no">
<title>CSS Fly</title>
<style>
* {
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
  -webkit-touch-callout: none;
}

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
}

body {
  background: linear-gradient(-45deg, #8B4513, #A0522D, #CD853F, #A0522D);
  background-size: 400% 400%;
  animation: gradient 15s ease infinite;
  position: relative;
  touch-action: none;
  display: flex;
  justify-content: center;
  align-items: center;
}

body::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0.25;
  background-image:
    radial-gradient(ellipse 50px 100px at 15% 25%, rgba(101, 67, 33, 0.4) 0%, transparent 50%),
    radial-gradient(ellipse 60px 110px at 85% 15%, rgba(111, 78, 55, 0.35) 0%, transparent 50%),
    radial-gradient(ellipse 55px 105px at 50% 60%, rgba(92, 64, 51, 0.38) 0%, transparent 50%),
    radial-gradient(ellipse 45px 90px at 25% 75%, rgba(107, 71, 38, 0.36) 0%, transparent 50%),
    radial-gradient(ellipse 65px 115px at 90% 70%, rgba(98, 68, 42, 0.33) 0%, transparent 50%),
    radial-gradient(ellipse 52px 98px at 10% 50%, rgba(104, 74, 48, 0.37) 0%, transparent 50%),
    radial-gradient(ellipse 58px 108px at 75% 30%, rgba(95, 65, 44, 0.34) 0%, transparent 50%),
    radial-gradient(ellipse 48px 95px at 40% 80%, rgba(100, 70, 40, 0.39) 0%, transparent 50%),
    radial-gradient(ellipse 62px 112px at 65% 45%, rgba(106, 72, 46, 0.32) 0%, transparent 50%),
    radial-gradient(ellipse 54px 102px at 30% 20%, rgba(97, 66, 43, 0.36) 0%, transparent 50%);
  background-size: 150% 150%;
  background-position: 0% 0%;
  pointer-events: none;
  z-index: 0;
  animation: drift-leaves 20s ease-in-out infinite;
}

body::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0.12;
  background-image:
    linear-gradient(125deg, transparent 48%, rgba(70, 45, 20, 0.5) 49%, rgba(70, 45, 20, 0.5) 51%, transparent 52%),
    linear-gradient(55deg, transparent 48%, rgba(75, 50, 25, 0.45) 49%, rgba(75, 50, 25, 0.45) 51%, transparent 52%),
    linear-gradient(95deg, transparent 48%, rgba(68, 43, 22, 0.48) 49%, rgba(68, 43, 22, 0.48) 51%, transparent 52%),
    linear-gradient(155deg, transparent 48%, rgba(72, 47, 24, 0.46) 49%, rgba(72, 47, 24, 0.46) 51%, transparent 52%);
  background-size: 140px 140px, 110px 110px, 125px 125px, 95px 95px;
  background-position: 0 0, 50px 50px, 25px 75px, 75px 25px;
  pointer-events: none;
  z-index: 0;
  animation: drift-veins 25s linear infinite;
}

@keyframes drift-leaves {
  0% {
    background-position: 0% 0%;
  }
  50% {
    background-position: 100% 100%;
  }
  100% {
    background-position: 0% 0%;
  }
}

@keyframes drift-veins {
  0% {
    background-position: 0 0, 50px 50px, 25px 75px, 75px 25px;
  }
  100% {
    background-position: 200px 200px, 250px 250px, 225px 275px, 275px 225px;
  }
}

@keyframes gradient {
  0% {
    background-position: 0% 50%;
  }
  50% {
    background-position: 100% 50%;
  }
  100% {
    background-position: 0% 50%;
  }
}

.beetle-container {
  width: 100%;
  height: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
  z-index: 1;
}

.beetle {
  position: relative;
  display: block;
  animation: hover-buzz 1.5s infinite ease-in-out;
}

.body {
  width: 80px;
  height: 180px;
  position: relative;
  border-radius: 40px;
  background: linear-gradient(180deg, #2a2a2a 0%, #1a1a1a 30%, #0a0a0a 50%, #1a1a1a 70%, #2a2a2a 100%);
  box-shadow:
    0 16px 40px rgba(0,0,0,0.6),
    inset 0 -10px 30px rgba(0,0,0,0.5),
    inset 0 6px 16px rgba(255,255,255,0.05);
  z-index: 10;
}

.body::before {
  content: "";
  position: absolute;
  top: 25%;
  left: 0;
  width: 100%;
  height: 75%;
  background:
    linear-gradient(0deg, transparent 18%, rgba(0,0,0,0.5) 19%, rgba(0,0,0,0.5) 21%, transparent 22%),
    linear-gradient(0deg, transparent 38%, rgba(0,0,0,0.5) 39%, rgba(0,0,0,0.5) 41%, transparent 42%),
    linear-gradient(0deg, transparent 58%, rgba(0,0,0,0.5) 59%, rgba(0,0,0,0.5) 61%, transparent 62%),
    linear-gradient(0deg, transparent 78%, rgba(0,0,0,0.5) 79%, rgba(0,0,0,0.5) 81%, transparent 82%);
  border-radius: inherit;
}

.body::after {
  content: "";
  position: absolute;
  top: 15%;
  right: 20%;
  width: 25px;
  height: 40px;
  background: rgba(255,255,255,0.08);
  border-radius: 50%;
}

.head {
  width: 70px;
  height: 70px;
  position: absolute;
  top: -50px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(180deg, #1a1a1a 0%, #0a0a0a 100%);
  border-radius: 50%;
  box-shadow: 0 6px 20px rgba(0,0,0,0.5);
  z-index: 11;
}

.head::before {
  content: "";
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 2px;
  height: 10px;
  background: #0a0a0a;
  border-radius: 2px;
}

.wing {
  position: absolute;
  width: 160px;
  height: 120px;
  top: 0px;
  background: radial-gradient(ellipse at 30% 50%, rgba(255,255,255,0.3) 0%, rgba(200,220,255,0.2) 40%, transparent 75%);
  border-radius: 50% 50% 50% 50% / 60% 60% 40% 40%;
  box-shadow:
    inset 0 0 20px rgba(255,255,255,0.15),
    0 4px 15px rgba(0,0,0,0.2);
  z-index: 5;
}

.wing::before {
  content: "";
  position: absolute;
  top: 5%;
  left: 10%;
  width: 80%;
  height: 90%;
  background:
    linear-gradient(120deg, transparent 48%, rgba(255,255,255,0.15) 49%, rgba(255,255,255,0.15) 51%, transparent 52%),
    linear-gradient(140deg, transparent 48%, rgba(255,255,255,0.1) 49%, rgba(255,255,255,0.1) 51%, transparent 52%),
    linear-gradient(160deg, transparent 48%, rgba(255,255,255,0.08) 49%, rgba(255,255,255,0.08) 51%, transparent 52%);
  border-radius: inherit;
}

.wing.front-left {
  right: 50%;
  transform-origin: right center;
  transform: rotate(-10deg);
  animation: wing-flutter-left 0.08s infinite ease-in-out;
}

.wing.front-right {
  left: 50%;
  transform-origin: left center;
  transform: rotate(10deg);
  animation: wing-flutter-right 0.08s infinite ease-in-out;
}

.wing.hind-left,
.wing.hind-right {
  width: 110px;
  height: 80px;
  top: 40px;
  z-index: 4;
}

.wing.hind-left {
  right: 50%;
  transform-origin: right center;
  transform: rotate(-15deg);
  animation: wing-flutter-hind-left 0.08s infinite ease-in-out;
}

.wing.hind-right {
  left: 50%;
  transform-origin: left center;
  transform: rotate(15deg);
  animation: wing-flutter-hind-right 0.08s infinite ease-in-out;
}

@keyframes wing-flutter-left {
  0%, 100% {
    transform: rotate(-10deg);
  }
  50% {
    transform: rotate(-35deg);
  }
}

@keyframes wing-flutter-right {
  0%, 100% {
    transform: rotate(10deg);
  }
  50% {
    transform: rotate(35deg);
  }
}

@keyframes wing-flutter-hind-left {
  0%, 100% {
    transform: rotate(-15deg);
  }
  50% {
    transform: rotate(-40deg);
  }
}

@keyframes wing-flutter-hind-right {
  0%, 100% {
    transform: rotate(15deg);
  }
  50% {
    transform: rotate(40deg);
  }
}

.antenna {
  width: 6px;
  height: 18px;
  position: absolute;
  top: 5px;
  background: linear-gradient(to top, #1a1a1a 0%, #0a0a0a 100%);
  border-radius: 3px;
  transform-origin: bottom center;
}

.antenna::after {
  content: "";
  position: absolute;
  top: -3px;
  left: 50%;
  transform: translateX(-50%);
  width: 4px;
  height: 8px;
  background: #0a0a0a;
  border-radius: 50%;
}

.antenna.left {
  left: 18px;
  transform: rotate(-20deg);
}

.antenna.right {
  right: 18px;
  transform: rotate(20deg);
}

.eye {
  width: 40px;
  height: 40px;
  position: absolute;
  top: 10px;
  background: radial-gradient(circle at 35% 35%, rgba(200, 50, 50, 0.95), rgba(120, 20, 20, 1));
  border-radius: 50%;
  box-shadow:
    0 0 20px rgba(139, 0, 0, 0.7),
    inset -8px -8px 15px rgba(0,0,0,0.6),
    inset 8px 8px 15px rgba(255,100,100,0.15);
  overflow: hidden;
}

.eye::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image:
    radial-gradient(circle at center, rgba(0,0,0,0.3) 20%, transparent 21%);
  background-size: 5px 5px;
  background-position: 0 0, 2.5px 2.5px;
  opacity: 0.8;
}

.eye:after {
  width: 18px;
  height: 18px;
  content: "";
  display: block;
  position: absolute;
  top: 20%;
  left: 20%;
  transform: translate(0, 0);
  background: radial-gradient(circle at 35% 35%, rgba(255,255,255,0.8), rgba(255,200,200,0.4) 40%, transparent 65%);
  border-radius: 50%;
  box-shadow:
    3px 3px 8px rgba(255,255,255,0.3) inset,
    -2px -2px 5px rgba(0,0,0,0.2) inset;
}

.eye.left {
  left: -5px;
}

.eye.right {
  right: -5px;
}



@keyframes hover-buzz {
  0% {
    transform: translateY(0) rotate(0deg);
  }
  25% {
    transform: translateY(-8px) rotate(-2deg);
  }
  50% {
    transform: translateY(-4px) rotate(0deg);
  }
  75% {
    transform: translateY(-12px) rotate(2deg);
  }
  100% {
    transform: translateY(0) rotate(0deg);
  }
}

.legs-container {
  position: absolute;
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
  z-index: -1;
}

.leg {
  position: absolute;
  width: 50px;
  height: 3px;
  background: linear-gradient(90deg, #0a0a0a 0%, #1a1a1a 100%);
  border-radius: 2px;
  transform-origin: left center;
  box-shadow: 0 2px 4px rgba(0,0,0,0.4);
}

.leg::after {
  content: "";
  position: absolute;
  left: 100%;
  top: 50%;
  width: 45px;
  height: 3px;
  background: linear-gradient(90deg, #1a1a1a 0%, #0a0a0a 100%);
  border-radius: 2px;
  transform-origin: left center;
  transform: translateY(-50%) rotate(-60deg);
  box-shadow: 0 2px 4px rgba(0,0,0,0.4);
}

.leg::before {
  content: "";
  position: absolute;
  /* Position at end of second segment: 100% + cos(-60°)*45px for x, sin(-60°)*45px for y */
  left: calc(100% + 22.5px);
  top: calc(50% - 39px);
  width: 35px;
  height: 3px;
  background: linear-gradient(90deg, #0a0a0a 0%, #1a1a1a 100%);
  border-radius: 2px;
  transform-origin: left center;
  transform: rotate(-120deg);
  box-shadow: 0 2px 4px rgba(0,0,0,0.4);
}

.leg.left {
  left: 0px;
  transform-origin: right center;
}

.leg.left::after {
  left: auto;
  right: 100%;
  transform-origin: right center;
  transform: translateY(-50%) rotate(60deg);
}

.leg.left::before {
  left: auto;
  right: calc(100% + 22.5px);
  top: calc(50% - 39px);
  transform-origin: right center;
  transform: rotate(120deg);
}

.leg.left-front {
  top: 15px;
  transform: rotate(-25deg);
}

.leg.left-middle {
  top: 40px;
  transform: rotate(-40deg);
}

.leg.left-back {
  top: 65px;
  transform: rotate(-50deg);
}

.leg.right {
  right: 0px;
  left: auto;
  transform-origin: left center;
}

.leg.right::after {
  left: 100%;
  right: auto;
  transform-origin: left center;
  transform: translateY(-50%) rotate(-60deg);
}

.leg.right::before {
  left: calc(100% + 22.5px);
  right: auto;
  top: calc(50% - 39px);
  transform-origin: left center;
  transform: rotate(-120deg);
}

.leg.right-front {
  top: 15px;
  transform: rotate(25deg);
}

.leg.right-middle {
  top: 40px;
  transform: rotate(40deg);
}

.leg.right-back {
  top: 65px;
  transform: rotate(50deg);
}


@media (max-width: 768px) {
  .body {
    width: 64px;
    height: 144px;
    border-radius: 32px;
  }

  .body::before {
    top: 25%;
    height: 75%;
  }

  .body::after {
    width: 20px;
    height: 32px;
  }

  .head {
    width: 56px;
    height: 56px;
    top: -40px;
  }

  .head::before {
    height: 8px;
    bottom: -8px;
  }

  .wing {
    width: 128px;
    height: 96px;
    top: 0px;
  }

  .wing.front-left {
    right: 50%;
  }

  .wing.front-right {
    left: 50%;
  }

  .wing.hind-left,
  .wing.hind-right {
    width: 88px;
    height: 64px;
    top: 32px;
  }

  .wing.hind-left {
    right: 50%;
  }

  .wing.hind-right {
    left: 50%;
  }

  .eye {
    width: 32px;
    height: 32px;
    top: 8px;
  }

  .eye::before {
    background-size: 4px 4px;
    opacity: 0.8;
  }

  .eye:after {
    width: 14px;
    height: 14px;
  }

  .eye.left {
    left: -4px;
  }

  .eye.right {
    right: -4px;
  }

  .antenna {
    width: 5px;
    height: 14px;
    top: 4px;
  }

  .antenna::after {
    top: -2px;
    width: 3px;
    height: 6px;
  }

  .antenna.left {
    left: 14px;
  }

  .antenna.right {
    right: 14px;
  }

  .leg {
    width: 40px;
    height: 2px;
  }

  .leg::after {
    width: 36px;
    height: 2px;
    left: 100%;
    top: 50%;
    transform: translateY(-50%) rotate(-60deg);
  }

  .leg::before {
    width: 28px;
    height: 2px;
    left: calc(100% + 18px);
    top: calc(50% - 31px);
    transform: rotate(-120deg);
  }

  .leg.left {
    left: 0px;
  }

  .leg.left::after {
    left: auto;
    right: 100%;
    transform: translateY(-50%) rotate(60deg);
  }

  .leg.left::before {
    left: auto;
    right: calc(100% + 18px);
    top: calc(50% - 31px);
    transform: rotate(120deg);
  }

  .leg.left-front {
    top: 12px;
  }

  .leg.left-middle {
    top: 32px;
  }

  .leg.left-back {
    top: 52px;
  }

  .leg.right {
    right: 0px;
  }

  .leg.right::after {
    left: 100%;
    right: auto;
    transform: translateY(-50%) rotate(-60deg);
  }

  .leg.right::before {
    left: calc(100% + 18px);
    right: auto;
    top: calc(50% - 31px);
    transform: rotate(-120deg);
  }

  .leg.right-front {
    top: 12px;
  }

  .leg.right-middle {
    top: 32px;
  }

  .leg.right-back {
    top: 52px;
  }
}
</style>
</head>
<body>
<div class="beetle-container">
  <div class="beetle">
    <div class="body">
      <div class="wing hind-left"></div>
      <div class="wing hind-right"></div>
      <div class="wing front-left"></div>
      <div class="wing front-right"></div>
      <div class="legs-container">
        <div class="leg left left-front"></div>
        <div class="leg left left-middle"></div>
        <div class="leg left left-back"></div>
        <div class="leg right right-front"></div>
        <div class="leg right right-middle"></div>
        <div class="leg right right-back"></div>
      </div>
      <div class="head">
        <div class="antenna left"></div>
        <div class="antenna right"></div>
        <div class="eye left"></div>
        <div class="eye right"></div>
      </div>
    </div>
  </div>
</div>

<script>
document.addEventListener('visibilitychange', function() {
  if (!document.hidden) {
    const fly = document.querySelector('.beetle');
    const wings = document.querySelectorAll('.wing');

    fly.style.animation = 'none';
    wings.forEach(wing => wing.style.animation = 'none');

    void fly.offsetWidth;

    fly.style.animation = '';
    wings.forEach(wing => wing.style.animation = '');
  }
});

window.addEventListener('load', function() {
  const fly = document.querySelector('.beetle');
  fly.style.animation = 'hover-buzz 1.5s infinite ease-in-out';

  setTimeout(() => {
    void fly.offsetWidth;
  }, 10);
});

window.addEventListener('pageshow', function(event) {
  if (event.persisted) {
    const fly = document.querySelector('.beetle');
    const wings = document.querySelectorAll('.wing');

    fly.style.animation = 'none';
    wings.forEach(wing => wing.style.animation = 'none');

    setTimeout(() => {
      fly.style.animation = '';
      wings.forEach(wing => wing.style.animation = '');
    }, 50);
  }
});
</script>
</body>
</html>