:root {
  --bottom-glow: radial-gradient(farthest-corner at bottom center,	rgba(255, 255, 255, 0.7),	transparent);
  --stripes: repeating-linear-gradient(to bottom, #eee 0px, #eee 2px, #fff 2px, #fff 4px);
}

body {
  background: var(--stripes);
  height: 100dvh;
  width: 100dvw;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
}

button.aero {
  --hue: 245;
  --button-background: oklch(75% 0.1 var(--hue) / 0.8);
  --bg-dark: oklch(45% 0.1 var(--hue) / 0.75);
  --button-foreground: oklch(15% 0.05 var(--hue));
  background-color: var(--button-background);
  background: var(--bottom-glow), linear-gradient(to bottom, var(--bg-dark), var(--button-background));
  box-shadow: 0 4px 4px rgba(0, 0, 0, 0.4);
  border: 1px solid var(--button-background);
  border-radius: 9999px;
  cursor: pointer;
  margin: 1em 1ex;
  padding: 1ex 1em;
  position: relative;
  text-shadow: 0 2px 0.5em #0003;
  transition: all 300ms;
  color: var(--button-foreground);
  font-family: "Lucida Grande", "Lucida Sans Unicode", "Lunasima", sans-serif;
  font-weight: 700;
}
button.aero::after {
  content: "";
  position: absolute;
  top: 4%;
  left: 0.5em;
  width: calc(100% - 1em);
  height: 40%;
  background: linear-gradient(to bottom, rgba(255, 255, 255, 0.8), rgba(255, 255, 255, 0.1));
  border-radius: 9999px;
  transition: background 400ms;
}
button.aero:hover, button.aero:focus {
  box-shadow: 0 6px 8px rgba(0, 0, 0, 0.4);
}
button.aero:active {
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.4);
}

input#hue {
  -webkit-appearance: none;
     -moz-appearance: none;
          appearance: none;
  background: linear-gradient(to right in oklch longer hue, oklch(75% 0.1 0), oklch(75% 0.1 360));
  border-radius: 9999px;
}