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HTML

              
                
              
            
!

CSS

              
                // Tailwindcss Colors

$gray-400: #9ca3af;
$gray-500: #6b7280;
$gray-600: #4b5563;
$gray-700: #374151;
$gray-800: #1f2937;
$gray-900: #111827;

$cyan-500: #06b6d4;
$cyan-600: #0891b2;
$cyan-700: #0e7490;
$cyan-800: #155e75;

body {
  background-color: $gray-900;
  width: 100vw;
  height: 100vh;
  font-family: 'Montserrat', sans-serif;
}

.app {
  width: 100%;
  min-height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  
  .text-container {
    position: relative;
    z-index: 1;
    margin: 1rem 0;
    text-align: center;
    
    h1 {
      color: white; 
      font-family: 'Pridi';
      font-size: 5rem;
      margin-bottom: 1rem;
    }
    p {
      color: $gray-500;
      font-weight: 500;
      letter-spacing: 0.05rem;
      margin: 0.5rem 0;
    }
    a {
      color: $cyan-500;
      
      &:hover {
        border-bottom: 0.2rem solid $cyan-500;
      }
    }
  }
}

svg {
  background-color: $gray-700;
  width: 100%;
  overflow: visible;
  
  > path:nth-child(1) {
    fill: $gray-600;
    stroke: $gray-800;
  }
  
  > path:nth-child(2) {
    fill: $gray-900;
  }
  
  > path:nth-child(6) {
    fill: $gray-800;
  }
  
  text {
    fill: $gray-500;
    font-size: 660px;
    font-weight: 800;
    filter: drop-shadow(0 0 50px $gray-800);
  }
  
  > path:nth-child(8) {
    fill: $gray-900;
  }
}

.cactus {
  path:nth-child(1) {
    fill: $cyan-700;
  }
  path:nth-child(2) {
    fill: $cyan-800;
  }
  path:nth-child(3) {
    fill: black;
  }
}
              
            
!

JS

              
                import React, {useState, useEffect} from 'https://cdn.skypack.dev/react';
import ReactDOM from 'https://cdn.skypack.dev/react-dom';

const useDocumentEvent = (event, handler) => {
    useEffect(() => {
        document.addEventListener(event, handler);
        return () => document.removeEventListener(event, handler);
    }, [event, handler]);
};

const useMouseParallax = (...depths) => {
    const [coords, setCoords] = useState(depths.map(() => ({x: 0, y: 0})));
    useDocumentEvent('mousemove', e => {
        requestAnimationFrame(() => {
            const width = window.innerWidth, height = window.innerHeight;
            const x = e.clientX / width - 0.5, y = e.clientY / height - 0.5; // Normalized to -0.5 <-> 0.5
            setCoords(depths.map(depth => ({
                x: depth * x,
                y : depth * y,
            })));
        });
    });
    return coords;
}

const Cactus = ({x, y, scale}) => (
    <g className='cactus' x={x} y={y} style={{transform: `translate(${x}px, ${y}px) scale(${scale})`, transformOrigin: 'center', transformBox: 'fill-box'}}>
        <path d="m276.5 542.8c0 0-51.3-1.1-86-35.8c-38.6-38.6-38.9-75.8-38.9-75.8v-94.2c0 0-0.3-27.7 28.6-27.7c28.9 0 28.7 27.7 28.7 27.7v69.6c0 0 2 22.9 19.5 44.1c17.4 21.1 49.1 19.4 49.1 19.4v-287.8c0 0 0.2-43.7 42-43.7c37.4 0 44.1 38.6 44.1 38.6v264.2c0 0 29.4-4.3 48.1-22.5c18.7-18.1 19.5-44 19.5-44v-103.5c0 0-2.5-31.2 27.3-31.2c28.2 0 29 27.1 29 27.1v130.1c0 0 1.5 40.8-38.9 79.4c-38.2 36.6-86.1 37.4-86.1 37.4v120.9c-14.2 1.9-28.7 2.9-43.5 2.9c-14.1 0-28-0.9-41.6-2.7z" />
        <path d="m330 139.3c15.4 3.9-12.7 14.1-18 29.7c-5.3 15.5-8 26-8 26v442.7q-13.7-0.7-27-2.4v-92.3c0 0-53.3-2.3-77-26c-49.3-49.3-48-81-48-81v-101c0 0 1.9-14.1 8-17c6.1-2.9 13-7 13-7c0 0-6.6 9-9 19c-2.4 10-1.6 77.9-1.6 99.7c0 21.8 17.5 47.3 39.1 65.4c31 26 74.5 26.9 74.5 26.9v-344c0 0 6.4-22.2 18.4-30.3c12-8.1 22.8-11.7 35.6-8.4zm33 351.7c0 0 13.5 1.7 54-14c50.9-19.8 71.2-79.5 71.2-79.5c0 0-8.4 51.7-43.2 83.5c-31.9 29.2-82 32-82 32zm97-250c0 0-8.2 5.1-13 19c-4.8 13.9-1.8 88.3-1.8 96.7c0 8.4-1.1 30.9-11.4 44c-12.4 15.7-24.1 19.5-24.1 19.5c0 0 9.3-4.9 14.3-18.2c5-13.3 6-24 6-24v-114c0 0 5.9-16.9 15-20c9.1-3.1 15-3 15-3z" />
        <path d="m490.9 310.7v26.8h13.9c2.5 0 4.5 2 4.5 4.5c0 2.5-2 4.5-4.5 4.5h-13.9v26.7h13.9c2.5 0 4.5 2 4.5 4.5c0 2.5-2 4.5-4.5 4.5h-13.9v5.2q0 11.1-1.8 21.6h13.1c2.5 0 4.5 1.9 4.5 4.4c0 2.5-2 4.5-4.5 4.5h-14.9c-13.4 55.1-62.2 96.4-120.9 98.4v29.5h13.9c2.4 0 4.4 2 4.4 4.5c0 2.5-2 4.5-4.4 4.5h-13.9v26.7h13.9c2.4 0 4.4 2 4.4 4.5c0 2.5-2 4.5-4.4 4.5h-13.9v44q-4.4 0.7-8.9 1.2v-144.4c0-2.5 2-4.5 4.4-4.5c2.5 0 4.5 2 4.5 4.5v16.1c64.1-2.4 115.6-55.2 115.6-119.9v-119c0-13.3-10.8-24-24-24c-13.2 0-23.9 10.7-23.9 24v104.6c0 38.3-30 69.7-67.7 72v7.6c0 2.4-2 4.4-4.5 4.4c-2.4 0-4.4-2-4.4-4.4v-271.4c0-21.1-17.2-38.2-38.2-38.2c-21.1 0-38.2 17.1-38.2 38.2v301.8c0 2.5-2 4.5-4.5 4.5c-2.4 0-4.4-2-4.4-4.5v-8.2c-38.3-1.7-69-33.3-69-72v-64.9c0-13.2-10.7-24-23.9-24c-13.3 0-24 10.8-24 24v79.2c0 65.1 52.1 118.3 116.9 120v-18.4c0-2.4 2-4.4 4.4-4.4c2.5 0 4.5 2 4.5 4.4v117q-4.5-0.5-8.9-1.2v-20.3h-13.9c-2.5 0-4.5-2-4.5-4.5c0-2.4 2-4.4 4.5-4.4h13.9v-26.8h-13.9c-2.5 0-4.5-2-4.5-4.5c0-2.5 2-4.5 4.5-4.5h13.9v-23.5c-58.6-1.4-107.6-42-121.7-96.5h-18c-2.5 0-4.5-2-4.5-4.4c0-2.5 2-4.5 4.5-4.5h16c-1.4-7.6-2.1-15.5-2.1-23.5v-3.3h-13.9c-2.5 0-4.5-2-4.5-4.5c0-2.4 2-4.4 4.5-4.4h13.9v-26.8h-13.9c-2.5 0-4.5-2-4.5-4.5c0-2.4 2-4.4 4.5-4.4h13.9v-26.8h-13.9c-2.5 0-4.5-2-4.5-4.5c0-2.4 2-4.4 4.5-4.4h14.2c2.2-16.1 15.9-28.5 32.6-28.5c18.1 0 32.8 14.8 32.8 32.9v2.5h13.9c2.5 0 4.5 2 4.5 4.5c0 2.4-2 4.4-4.5 4.4h-13.9v26.8h13.9c2.5 0 4.5 2 4.5 4.5c0 2.4-2 4.4-4.5 4.4h-13.9v17.8c0 33.7 26.7 61.3 60.1 63v-30.2h-13.9c-2.5 0-4.5-2-4.5-4.4c0-2.5 2-4.5 4.5-4.5h13.9v-26.8h-13.9c-2.5 0-4.5-2-4.5-4.4c0-2.5 2-4.5 4.5-4.5h13.9v-26.8h-13.9c-2.5 0-4.5-2-4.5-4.4c0-2.5 2-4.5 4.5-4.5h13.9v-26.8h-13.9c-2.5 0-4.5-2-4.5-4.5c0-2.4 2-4.4 4.5-4.4h13.9v-26.8h-13.9c-2.5 0-4.5-2-4.5-4.5c0-2.4 2-4.4 4.5-4.4h13.9v-26.8h-13.9c-2.5 0-4.5-2-4.5-4.5c0-2.4 2-4.4 4.5-4.4h13.9v-26.8h-13.9c-2.5 0-4.5-2-4.5-4.5c0-2.5 2-4.4 4.5-4.4h13.9v-26.8h-13.9c-2.5 0-4.5-2-4.5-4.5c0-2.5 2-4.5 4.5-4.5h14.1c2.2-23.9 22.4-42.6 46.9-42.6c26 0 47.1 21.1 47.1 47.1v13.4h13.9c2.4 0 4.4 2 4.4 4.5c0 2.4-2 4.4-4.4 4.4h-13.9v26.8h13.9c2.4 0 4.4 2 4.4 4.5c0 2.4-2 4.4-4.4 4.4h-13.9v26.8h13.9c2.4 0 4.4 2 4.4 4.5c0 2.4-2 4.4-4.4 4.4h-13.9v26.8h13.9c2.4 0 4.4 2 4.4 4.5c0 2.5-2 4.5-4.4 4.5h-13.9v26.7h13.9c2.4 0 4.4 2 4.4 4.5c0 2.5-2 4.5-4.4 4.5h-13.9v26.7h13.9c2.4 0 4.4 2 4.4 4.5c0 2.5-2 4.5-4.4 4.5h-13.9v26.8h13.9c2.4 0 4.4 2 4.4 4.4c0 2.5-2 4.5-4.4 4.5h-13.9v18.2c32.8-2.3 58.7-29.7 58.7-63v-8.8h-13.9c-2.4 0-4.4-2-4.4-4.4c0-2.5 2-4.5 4.4-4.5h13.9v-26.8h-13.9c-2.4 0-4.4-2-4.4-4.5c0-2.4 2-4.4 4.4-4.4h13.9v-26.8h-13.9c-2.4 0-4.4-2-4.4-4.5c0-2.4 2-4.4 4.4-4.4h13.9v-15.5c0-18.2 14.8-32.9 32.9-32.9c17.4 0 31.6 13.5 32.8 30.5h14c2.5 0 4.5 2 4.5 4.5c0 2.4-2 4.4-4.5 4.4h-13.9v26.8h13.9c2.5 0 4.5 2 4.5 4.5c0 2.5-2 4.5-4.5 4.5c0-0.1-13.9-0.1-13.9-0.1z" />
    </g>
)

const Canyon = () => {
    const [p1, p2, p3, p4, p5, p6, p7] = useMouseParallax(-240, -150, -80, -20, 80, 150, 300);
    return (
        <svg viewBox='0 0 2000 720' className='bg-gray-700' preserveAspectRatio='xMidYMid slice'>
            <path style={{transform: `translate(${p3.x}px,${p3.y}px)`}} strokeWidth={5} d="m1831 198l-8 565l-95 3v-576.3zm-441-42v633.1h-257v-622.1zm-340 36v597.3h-201.7v-596.3zm-246 20v531.7h-53v-534.7zm-136-20v575.1h-153.4v-576.3zm-348 3v574.7h-159v-566.8z"/>
            <path style={{transform: `translate(${p3.x}px,${p3.y}px)`}} className='fill-gray-900' d="m-203.5 227v-467.6h2433.1v553.6l-399.6-71l-102 29l-335-76l-258 80l-85-30l-202 32l-45-35l-50 19l-84-35l-154 61l-194-58l-160 58z"/>
            <g style={{transform: `translate(${p1.x}px,${p1.y}px)`, opacity: 0.2}}>
                <Cactus x={0} y={-350} scale={0.1}/>
                <Cactus x={300} y={-320} scale={0.1}/>
                <Cactus x={520} y={-360} scale={0.08}/>
                <Cactus x={800} y={-330} scale={0.1}/>
                <Cactus x={1000} y={-380} scale={0.08}/>
                <Cactus x={1150} y={-350} scale={0.1}/>
                <Cactus x={1400} y={-360} scale={0.1}/>
            </g>
            <g style={{transform: `translate(${p2.x}px,${p2.y}px)`, opacity: 0.4}}>
                <Cactus x={80} y={-300} scale={0.15}/>
                <Cactus x={380} y={-280} scale={0.15}/>
                <Cactus x={600} y={-310} scale={0.1}/>
                <Cactus x={700} y={-290} scale={0.15}/>
                <Cactus x={1100} y={-320} scale={0.1}/>
                <Cactus x={1250} y={-300} scale={0.15}/>
                <Cactus x={1500} y={-310} scale={0.15}/>
            </g>
            <g style={{transform: `translate(${p3.x}px,${p3.y}px)`, opacity: 0.7}}>
                <Cactus x={-110} y={-200} scale={0.2}/>
                <Cactus x={180} y={-180} scale={0.25}/>
                <Cactus x={800} y={-190} scale={0.2}/>
                <Cactus x={500} y={-230} scale={0.15}/>
                <Cactus x={1300} y={-220} scale={0.15}/>
                <Cactus x={1450} y={-200} scale={0.2}/>
            </g>
            <path style={{transform: `translate(${p3.x}px,${p3.y}px)`, filter: 'blur(80px)'}} d='m-300,400 H2400 V700 H0 z'/>
            <text style={{transform: `translate(${p4.x}px,${p4.y}px)`}} x='1000' y='550' textAnchor='middle'>404</text>
            <path style={{transform: `translate(${p5.x}px,${p5.y}px)`}} d="m2195 396v531.1h-2437.2v-538.1l359.2 60l96-22l63 44l169-40l83 39l348-47l147 28l125-32l75 47l75-21l221 28l263-75l109 31z"/>
            <g style={{transform: `translate(${p5.x}px,${p5.y}px)`}}>
                <Cactus x={0} y={80} scale={0.4}/>
                <Cactus x={1000} y={100} scale={0.45}/>
                <Cactus x={1450} y={80} scale={0.4}/>
            </g>
        <g style={{transform: `translate(${p6.x}px,${p6.y}px)`, filter: 'blur(5px) brightness(0.7)'}}>
                <Cactus x={100} y={180} scale={0.5}/>
                <Cactus x={700} y={200} scale={0.55}/>
                <Cactus x={1350} y={250} scale={0.5}/>
            </g>
        <g style={{transform: `translate(${p7.x}px,${p7.y}px)`, filter: 'blur(10px) brightness(0.5)'}}>
                <Cactus x={0} y={320} scale={0.6}/>
                <Cactus x={400} y={280} scale={0.65}/>
                <Cactus x={1400} y={350} scale={0.6}/>
            </g>
        </svg>
    );
}

const App = () => (
  <div className='app'>
    <div className='text-container'>
      <h1>Not Found</h1>
      <p>Sorry, there&apos;s nothing to see here but cacti :(</p>
      <p>You can <a>go back home</a>, or <a>search for something</a>.</p>
    </div>
    <Canyon/>
  </div>
);

ReactDOM.render(
  <App/>,
  document.body
);
              
            
!
999px

Console