:root {
  color-scheme: light dark;
  --bg: #ffffff;
  --fg: #111111;
  --border: #111111;
  --muted: #666666;
  --error: #b00020;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111111;
    --fg: #eeeeee;
    --border: #eeeeee;
    --muted: #999999;
    --error: #ff6b6b;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg);
  color: var(--fg);
  font-family: ui-monospace, "SF Mono", Consolas, monospace;
}

main {
  text-align: center;
  padding: 2rem;
  width: 100%;
  max-width: 32rem;
}

h1 {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  margin: 0 0 2rem;
}

#roll {
  font: inherit;
  font-size: 1rem;
  font-weight: 700;
  padding: 0.75em 1.5em;
  border-radius: 0;
  border: 2px solid var(--border);
  cursor: pointer;
  background: var(--bg);
  color: var(--fg);
}

#roll:hover {
  background: var(--fg);
  color: var(--bg);
}

#roll:disabled {
  opacity: 0.5;
  cursor: default;
  background: var(--bg);
  color: var(--fg);
}

#result {
  margin-top: 2rem;
  min-height: 2rem;
}

#result a {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--fg);
  text-decoration: underline;
}

#result.error {
  color: var(--error);
  font-size: 0.9rem;
}