:root {
  --border-gradient:
    radial-gradient(ellipse at top left, transparent, #e66465),
    radial-gradient(ellipse at top center, #59fff1, transparent),
    radial-gradient(ellipse at top right, #7c44ff, transparent),
    radial-gradient(ellipse at right center, #ed4e4e, transparent),
    radial-gradient(ellipse at right bottom, #f666f9, transparent),
    radial-gradient(ellipse at bottom center, #f0ff65, transparent),
    radial-gradient(ellipse at bottom left, #a0f25c, transparent),
    radial-gradient(ellipse at left center, #fb86ff, transparent);
}

* {
  box-sizing: border-box;
  font-family: 'Montserrat', sans-serif;
  margin: 0;
  padding: 0;
}

*:focus {
  outline: none;
}

body {
  background-color: var(--background-color);
  color: var(--foreground-color);
}

.sr-only {
  display: none;
}

.border {
  background: var(--border-gradient);
  padding: 0.5rem;
  position: relative;
}

.content {
  background-color: var(--background-color);
  padding: 0.5rem;
}

main {
  display: grid;
  height: 100vh;
  place-items: center;
}

h1 {
  font-family: 'Roboto Slab', serif;
  font-size: 1.5rem;
}

fieldset, label, input, output, .separator {
  margin-top: 0.5rem;
}

fieldset {
  border: none;
}

label {
  display: block;
}

label:has(input[name="cost"], output) {
  position: relative;
}

label:has(input[name="cost"], output)::after {
  content: attr(data-currency);
  position: absolute;
  top: 50%;
  right: 0.5rem;
  transform: translateY(25%);
}

input[name="cost"], output {
  box-shadow: 0 0 0.125rem 0.125rem #E0E0E0 inset;
  color: #000000;
  font-size: 1rem;
  padding: 0.5rem;
}

input:not([type="radio"]) {
  border: none;
  width: 100%;
}

input[type="radio"] {
  appearance: none;
  border: 0.1rem solid currentColor;
  display: inline-grid;
  height: 1rem;
  margin: 0;
  place-items: center;
  transform: translateY(25%);
  width: 1rem;
}

input[type="radio"]:checked {
  background-color: currentColor;
}

output {
  background-color: #FFFFFF;
  display: block;
  isolation: isolate;
  position: relative;
  transition: 300ms background-color ease-out;
  width: 100%;
  white-space: pre-wrap;
}

output:active {
  background-color: #F5F5F5;
  transition: none;
}

output::after {
  color: transparent;
  content: attr(data-on-click-message);
  left: 50%;
  padding: 0.25rem;
  position: absolute;
  top: 50%;
  transform: translateX(-50%) translateY(-50%);
  transition: 300ms background-color ease-out, 300ms color ease-out;
  white-space: nowrap;
}

output:active::after {
  background-color: #F5F5F5;
  color: #000000;
  transition: none;
}

.separator {
  background-image:
    linear-gradient(
      -45deg,
      transparent 0% 45%,
      #E0E0E0 45% 55%,
      transparent 55% 100%),
    linear-gradient(
      +45deg,
      transparent 0% 45%,
      #E0E0E0 45% 55%,
      transparent 55% 100%);
  background-size: 0.5rem 0.5rem;
  height: 0.5rem;
}

html {
  font-size: 12pt;
  margin: 0 1rem;
}

@media (min-width: 576px) {
  html {
    font-size: 13pt; 
    margin: 0 4rem;
  }
}

@media (min-width: 768px) {
  html {
    font-size: 14pt;
  } 

  .content {
    margin: auto;
    width: 40ch;
  }
}

:root {
  --background-color: #FFFFFF;
  --foreground-color: #000000;
}