:root {
  --system-font: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI',
    Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;

  --colour-100: #111;
  --colour-300: #333;
  --colour-600: #666;
  --colour-900: #eee;
  --colour-note: palegoldenrod;
  --colour-error: darkred;
  --colour-success: darkgreen;

  --colour-link: color-mix(in oklab, #00e, var(--colour-100) 33.333%);
  --colour-visited: color-mix(in oklab, #551a8b, var(--colour-600) 33.333%);
  --colour-active: color-mix(in oklab, #f00, var(--colour-100) 33.333%);
}

html,
body {
  height: 100%;
  margin: 0;
  font-family: var(--system-font);
}

body {
  display: flex;
  flex-direction: column;
  gap: 2rem;
  align-items: center;
  justify-content: center;
  background-color: var(--colour-900);
  color: var(--colour-100);
}

::selection {
  background-color: var(--colour-600);
  color: var(--colour-900);
}

h1 {
  margin: 0 2rem;
  font-size: 1rem;
  color: var(--colour-600);
  text-align: center;
  font-weight: normal;
}

.answer {
  margin: 0 2rem;
  font-size: 3rem;
  text-transform: uppercase;
  text-align: center;
  font-weight: 600;
}

.attribution {
  position: absolute;
  top: 0;
  right: 0;
  padding: 0.5rem 1rem;
  margin: 0;
  border-radius: 0 0 0 0.5rem;
  text-decoration: none;
  opacity: 0.333;
  transition: opacity 0.3s ease-in-out;
  background-color: var(--colour-link);
  color: var(--colour-900);
}

.attribution strong {
  text-decoration: underline;
}

.attribution:hover,
.attribution:focus-visible {
  opacity: 1;
}

.edit {
  position: absolute;
  top: 0;
  left: 0;
  margin: 0;
  font-size: 2rem;
}

.edit a {
  display: flex;
  align-items: center;
  padding: 0 0.5rem 0.5rem 0.5rem;
  color: var(--colour-300);
  text-decoration: none;
  opacity: 0.333;
  transition: opacity 0.3s ease-in-out;
}

.edit a:hover,
.edit a:focus-visible {
  opacity: 1;
}

.edit a:hover::after,
.edit a:focus-visible::after {
  content: 'Edit this page';
  padding-left: 1rem;
  font-size: 1rem;
}

.edit-form #answer {
  margin: 0 2rem;
  font-size: 3rem;
  text-transform: uppercase;
  text-align: center;
  font-weight: 600;
}

.password {
  margin-top: 2rem;
}

.form-actions {
  margin-top: 1rem;
  display: flex;
  justify-content: center;
}