<div class="flight-component">
  <span>New York</span>
  <input type="range" class="flight" style="--val:0" value="0" min="0" max="100" oninput="this.style='--val:'+this.value" aria-label="percentage flown" />
  <span>Madrid</span>
</div>
body {
  min-height: 100vh;
  margin: 0;
  display: grid;
  place-items: center;
  background: #c2e5f9;
}

.flight-component {
  --w: min(700px, 90vw);
  width: var(--w);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5em;
  font-family:  Helvetica, Arial, sans-serif;
  font-weight: 200;
  font-size: 1.25rem;
}

/*
Didn't nest this one, in case I wanted to use the input by itself 
without the div/span structure (in that case: add width!!)
*/
.flight-component input,
input.flight {
  --bg: #6c6c84;
  --scale: clamp(1, calc(1 + 0.5 * sin(pi * var(--val) / 100)), 2);
  --shadow: clamp(0.15em, calc(1em * sin(pi * var(--val) / 100)), 1em);
  --opacity: clamp(0.2, calc(1 - sin(pi * var(--val) / 100)), 0.4);
  --color: rgb(0 0 0 / var(--opacity));
  --primary: #f0f4fc;
  --secondary: #b55;
  --val: 0;
  --height: 3em;
  appearance: none;
  container-type: inline-size;
  flex: 1;
  height: var(--height);
  border: none; /* Firefox adds a default border */
  border-radius: 10em;
  position: relative;
  background: 
    radial-gradient(circle at 0.35em 50%, var(--bg) 0.35em, #0000 0) no-repeat,
    radial-gradient(circle at calc(100% - 0.35em) 50%, var(--bg) 0.35em, #0000 0) no-repeat,
    linear-gradient(#0000 45%, var(--bg) 0 55%, #0000 0) 50% 50% / 99% 100%,
    #f000;
  border: 0;
  -webkit-print-color-adjust: exact;
  print-color-adjust: exact;

  /* 
  the ::before and ::after won't work on Firefox for input range,
  so only use for decoration on the other browsers 
  */
  &::before {
    content: "";
    width: calc(var(--val)  * 1%);
    min-width: 0.5em;
    height: 100%;
    position: absolute;
    top: 0;
    left: 0;
    background: 
      radial-gradient(circle at 0.35em 50%, #000 0.35em, #0000 0) no-repeat,
      linear-gradient(#0000 45%, #000 0 55%, #0000 0) 50% 50% / calc(100% - 1em) 100% no-repeat,
      #f000;
  }

  &::after {
    content: "";
    width: 100%;
    height: 12em;
    position: absolute;
    top: 50%;
    left: 0;
    transform: translate(0, -50%);
    pointer-events: none;
    background:
      /* cloud 1 */
      radial-gradient(3% 20% at 50% 20%, #fff 40%, #0000 0),
      radial-gradient(3% 20% at 52.5% 13%, #fff 40%, #0000 0),
      radial-gradient(2% 20% at 51% 10%, #fff 40%, #0000 0),
      radial-gradient(2.5% 20% at 51.5% 27%, #fff 50%, #0000 0),
      radial-gradient(2% 20% at 53% 23%, #fff 60%, #0000 0),
      radial-gradient(4% 40% at 55% 20%, #fff 40%, #0000 0),
      /* cloud 2 */
      radial-gradient(3% 20% at 40% 80%, #fff 40%, #0000 0),
      radial-gradient(3% 20% at 42.5% 87%, #fff 40%, #0000 0),
      radial-gradient(2% 20% at 41% 90%, #fff 40%, #0000 0),
      radial-gradient(2.5% 20% at 41.5% 72%, #fff 50%, #0000 0),
      radial-gradient(2% 20% at 43% 73%, #fff 60%, #0000 0),
      radial-gradient(4% 40% at 40% 78%, #fff 40%, #0000 0);
    background-size: 300% 100%;
    background-position: calc(var(--val) * 1%) 0;
    -webkit-mask: linear-gradient(90deg, #0000, #0008 35% 65%, #0000);
    mask: linear-gradient(90deg, #0000, #0008 35% 65%, #0000);
  }

  /* track for Chrome and Safari (Firefox is ok) */
  &::-webkit-slider-runnable-track {
    height: 100%;
    /* so the plane is above the clouds */
    position: relative;
    z-index: 1; 
    -webkit-print-color-adjust: exact;
    print-color-adjust: exact;
  }


  /* Thumb for Chrome and Safari */
  &::-webkit-slider-thumb {
    -webkit-appearance: none; /* Override default look */
    appearance: none;
    transform: translateY(calc(-50% + var(--height) / 2)) scale(var(--scale));
    width: 4em;
    aspect-ratio: 1;
    pointer-events: none;
    background: 
      linear-gradient(var(--secondary) 0 0) 2% 50% / 13% 2.5% no-repeat,
      /* main frame */
      conic-gradient(at -40% 50%, #0000 84.75deg, var(--primary) 85deg 95deg, #0000 95.25deg) 0 0 / 80% 100%,
      /* pilot */
      radial-gradient(closest-side circle at calc(100% - 0.85em) 50%, #9cf 0.3em, #0000 0),
      radial-gradient(20% 10% at 80% 50%, var(--primary) 99%, #0000),
      /* tail */
      conic-gradient(at 45% -45%, #0000 150deg, var(--secondary) 151deg 174deg, #0000 175deg) -50% 40% / 53% 20%,
      conic-gradient(at 45% 145%, #0000 5deg, var(--secondary) 6deg 29deg, #0000 30deg) -50% 60% / 53% 20%,
      /* wings */
      conic-gradient(at 38% -45%, #0000 158deg, var(--secondary) 158.5deg 174deg, #0000 174.5deg) 0 0 / 100% 50%,
      conic-gradient(at 38% 145%, #0000 5deg, var(--secondary) 5.5deg 21deg, #0000 21.5deg) 0 100% / 100% 50%,
      /* engines */
      radial-gradient(80% 50%, #000 99%, #0000) 51% 22% / 21% 11%,
      radial-gradient(80% 50%, #000 99%, #0000) 51% 78% / 21% 11%;
    background-repeat: no-repeat;
    border-radius: 20% / 100%;
    filter: drop-shadow(calc(var(--shadow) * 2) calc(var(--shadow) * 1.25) var(--shadow) var(--color));
    box-shadow: none; /* Safari adds a box-shadow when using drop-shadow on iOS, remove manually */
    -webkit-print-color-adjust: exact;
    print-color-adjust: exact;
  }

  /* Thumb for Firefox */
  &::-moz-range-thumb {
    -webkit-appearance: none; /* Override default look */
    appearance: none;
    transform: scale(var(--scale));
    width: 4em;
    height: 4em;
    border: none;
    pointer-events: none;
    background: 
      linear-gradient(var(--secondary) 0 0) 2% 50% / 13% 2.5% no-repeat,
      /* main frame */
      conic-gradient(at -40% 50%, #0000 84.75deg, var(--primary) 85deg 95deg, #0000 95.25deg) 0 0 / 80% 100%,
      /* pilot */
      radial-gradient(closest-side circle at calc(100% - 0.85em) 50%, #9cf 0.3em, #0000 0),
      radial-gradient(20% 10% at 80% 50%, var(--primary) 99%, #0000),
      /* tail */
      conic-gradient(at 45% -45%, #0000 150deg, var(--secondary) 151deg 174deg, #0000 175deg) -50% 40% / 53% 20%,
      conic-gradient(at 45% 145%, #0000 5deg, var(--secondary) 6deg 29deg, #0000 30deg) -50% 60% / 53% 20%,
      /* wings */
      conic-gradient(at 38% -45%, #0000 158deg, var(--secondary) 158.5deg 174deg, #0000 174.5deg) 0 0 / 100% 50%,
      conic-gradient(at 38% 145%, #0000 5deg, var(--secondary) 5.5deg 21deg, #0000 21.5deg) 0 100% / 100% 50%,
      /* engines */
      radial-gradient(80% 50%, #000 99%, #0000) 51% 22% / 21% 11%,
      radial-gradient(80% 50%, #000 99%, #0000) 51% 78% / 21% 11%;
    background-repeat: no-repeat;
    border-radius: 20% / 100%;
    filter: drop-shadow(calc(var(--shadow) * 2) calc(var(--shadow) * 1.25) var(--shadow) var(--color));
    box-shadow: none;
    -webkit-print-color-adjust: exact;
    print-color-adjust: exact;
  }
}


@media (prefers-contrast: more) {
  .flight-component input,
  input.flight {
    
    &::-webkit-slider-runnable-track {
      border: 2px solid #666;
      height: 0;
    }

    &::-webkit-slider-thumb {
      transform: translateY(-50%) scale(var(--scale));
      box-sizing: border-box;
      border: 2em solid Highlight;
      clip-path: polygon(0.00% 47.00%,3.00% 46.62%,0.88% 31.62%,5.38% 31.25%,13.38% 45.75%,44.38% 42.50%,43.00% 29.50%,40.25% 29.00%,40.00% 21.50%,42.75% 20.88%,40.00% 0.00%,47.12% 0.12%,55.00% 19.88%,60.88% 19.88%,60.88% 29.12%,58.88% 29.38%,63.75% 40.62%,81.75% 39.75%,88.00% 40.38%,93.00% 42.00%,97.25% 44.38%,99.25% 46.62%,100.00% 50.00%,99.25% 53.38%,97.25% 55.62%,93.00% 58.00%,88.00% 59.62%,81.75% 60.25%,63.75% 59.38%,58.88% 70.62%,60.88% 70.88%,60.88% 80.12%,55.00% 80.12%,47.12% 100.00%,40.00% 100.00%,42.75% 79.12%,40.00% 78.50%,40.25% 71.00%,43.00% 70.50%,44.38% 57.50%,13.38% 54.25%,5.38% 68.75%,0.88% 68.38%,3.00% 53.38%,0.00% 53.00%);
    }
    
    &::-moz-range-track {
      border: 2px solid #000;
      height: 0;
    }
    
    &::-moz-range-thumb {
      box-sizing: border-box;
      border: 2em solid Highlight;
      clip-path: polygon(0.00% 47.00%,3.00% 46.62%,0.88% 31.62%,5.38% 31.25%,13.38% 45.75%,44.38% 42.50%,43.00% 29.50%,40.25% 29.00%,40.00% 21.50%,42.75% 20.88%,40.00% 0.00%,47.12% 0.12%,55.00% 19.88%,60.88% 19.88%,60.88% 29.12%,58.88% 29.38%,63.75% 40.62%,81.75% 39.75%,88.00% 40.38%,93.00% 42.00%,97.25% 44.38%,99.25% 46.62%,100.00% 50.00%,99.25% 53.38%,97.25% 55.62%,93.00% 58.00%,88.00% 59.62%,81.75% 60.25%,63.75% 59.38%,58.88% 70.62%,60.88% 70.88%,60.88% 80.12%,55.00% 80.12%,47.12% 100.00%,40.00% 100.00%,42.75% 79.12%,40.00% 78.50%,40.25% 71.00%,43.00% 70.50%,44.38% 57.50%,13.38% 54.25%,5.38% 68.75%,0.88% 68.38%,3.00% 53.38%,0.00% 53.00%);
    }
  }
}

/* the clouds look bad in smaller screens, hide them */
@container (max-width: 400px) {
  .flight-component input,
  input.flight {
    &::after {
      display: none;
    }

    /* replace the place with a helicopter */
    &::-webkit-slider-thumb {    
      width: 3em;
      background:
        /* rotors */
        radial-gradient(closest-side circle at 50% 50%, var(--secondary) 10%, #0001 11% 90%, #0000 91%) 100% 50% / 90% 90%,
        radial-gradient(closest-side circle at 50% 50%, #0000 0 20%, #0001 0 40%, #0000 0 60%, #0001 0 80%, #0000 0) 100% 50% / 91% 91%,
        /* main frame */
        conic-gradient(at -65% 50%, #0000 84.75deg, var(--primary) 85deg 95deg, #0000 95.25deg) 0 0 / 80% 100%,
        /* pilot */
        radial-gradient(farthest-side circle at calc(100% - 0.5em) 50%, #9cf 0.4em, #0000 0),
        radial-gradient(25% 20% at 75% 50%, var(--primary) 99%, #0000),
        /* tail */
        conic-gradient(at 45% -45%, #0000 150deg, var(--secondary) 151deg 174deg, #0000 175deg) -49% 40% / 53% 25%,
        conic-gradient(at 45% 145%, #0000 5deg, var(--secondary) 6deg 29deg, #0000 30deg) -49% 60% / 53% 25%,
        /* legs? */
        linear-gradient(#000 0 0) 100% 33% / 60% 4%,
        linear-gradient(#000 0 0) 100% 67% / 60% 4%
        ;
      background-repeat: no-repeat;
    }
    
    &::-moz-range-thumb {
      width: 3em;
      height: 3em;
      background:
        /* rotors */
        radial-gradient(closest-side circle at 55% 50%, var(--secondary) 10%, #0001 11% 90%, #0000 91%),
        radial-gradient(closest-side circle at 50% 50%, #0000 0 20%, #0001 0 40%, #0000 0 60%, #0001 0 80%, #0000 0) 50% 50% / 91% 91%,
        /* main frame */
        conic-gradient(at -65% 50%, #0000 84.75deg, var(--primary) 85deg 95deg, #0000 95.25deg) 0 0 / 80% 100%,
        /* pilot */
        radial-gradient(farthest-side circle at calc(100% - 0.5em) 50%, #9cf 0.4em, #0000 0),
        radial-gradient(25% 20% at 75% 50%, var(--primary) 99%, #0000),
        /* tail */
        conic-gradient(at 45% -45%, #0000 150deg, var(--secondary) 151deg 174deg, #0000 175deg) -49% 40% / 53% 25%,
        conic-gradient(at 45% 145%, #0000 5deg, var(--secondary) 6deg 29deg, #0000 30deg) -49% 60% / 53% 25%,
        /* legs? */
        linear-gradient(#000 0 0) 100% 33% / 60% 4%,
        linear-gradient(#000 0 0) 100% 67% / 60% 4%
        ;
      background-repeat: no-repeat;
    }
  }
}

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