* {
  box-sizing: border-box;
}

body {
  font-family: sans-serif;
  display: flex;
  justify-content: center;
  align-items: center;
  background-image: radial-gradient(rgb(67, 144, 144), darkslategrey);
  color: whitesmoke;
}

input[type="file"] {
  width: 100vw;
  height: 100dvh;
  position: absolute;
  inset: 0 0 auto auto;
  opacity: 0;
  cursor: pointer;
}

button {
  position: absolute;
  top: 0;
  opacity: 0;
}

main {
  text-align: center;
  padding: 60px 30px;
  text-shadow: 0 1ch 2ch rgba(0,0,0,0.5);
  font-size: 120%;
}

label {
  cursor: pointer;
  background-color: rgb(234, 70, 73);
  padding: 10px 20px;
  color: white;
  font-weight: bold;
  border: 3px solid currentColor;
  text-shadow: 0 2px 3px rgba(0,0,0,0.5);
  font-size: 150%;
  border-radius: 30px;
  box-shadow: 0 1ch 2ch rgba(0,0,0,0.5), 0 0ch 5ch rgba(255,255,255,0.3);
  margin-top: 30px;
  display: inline-block;
  font-family: monospace;
  transition-duration:  0.1s;
  transition-timing-function: ease;
  transition-property: background-color, transform;
}

form[aria-busy] {
  opacity: 0.5;
  pointer-events: none;
}

a {
  text-shadow: 0 2px 3px rgba(0,0,0,0.5);
  background-color: rgb(234, 70, 73);
  color: whitesmoke;
  box-shadow: 0 1ch 2ch rgba(0,0,0,0.5), 0 0ch 5ch rgba(255,255,255,0.3);
  padding: 3px 4px 6px;
  border-radius: 2px;
  display: inline-block;
  text-decoration-thickness: 2px;
  text-decoration-style: dashed;
  text-underline-offset: 4px;
}