:root {
  color-scheme: light dark;
  --bg: #f7f7f5;
  --fg: #111;
  --muted: #444;
  --link: #0b57d0;
  --line: color-mix(in srgb, var(--fg) 14%, transparent);
  --soft: color-mix(in srgb, var(--fg) 5%, transparent);
  --font-display: "Fraunces", Georgia, serif;
  --font-body: "Source Sans 3", "Segoe UI", sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #000;
    --fg: #fff;
    --muted: #c8c8c8;
    --link: #8ab4ff;
  }
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: clamp(1.25rem, 4vw, 2.5rem);
  font-family: var(--font-body);
  font-size: 1.1rem;
  line-height: 1.55;
  color: var(--fg);
  background: var(--bg);
  text-align: center;
}

main {
  width: min(40rem, 100%);
}

.brand {
  margin: 0 0 1.25rem;
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 8vw, 3.4rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1;
}

h2 {
  margin: 1.1rem 0 0.55rem;
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 4.5vw, 2rem);
  font-weight: 600;
  line-height: 1.2;
}

p {
  margin: 0 0 1rem;
  color: var(--muted);
}

.lead {
  font-size: 1.15rem;
  color: var(--fg);
}

.thanks {
  margin: 0.25rem auto 0;
  max-width: 28rem;
  font-size: 1.05rem;
  color: var(--fg);
}

.prize {
  min-height: 0;
}

.hero {
  display: block;
  width: min(100%, 22rem);
  height: auto;
  margin: 0 auto 0.75rem;
}

a {
  color: var(--link);
}

code {
  font-family: ui-monospace, Consolas, monospace;
  font-size: 0.95em;
}

.note {
  margin-top: 1.75rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--line);
  font-size: 1rem;
}

.note p:last-child {
  margin-bottom: 0;
}

.benefits {
  margin: 1.75rem auto 0;
  padding: 1.25rem 1.1rem 1.15rem;
  text-align: left;
  background: var(--soft);
  border: 1px solid var(--line);
}

.benefits h2 {
  margin-top: 0;
  text-align: center;
}

.benefits ul {
  margin: 0;
  padding-left: 1.2rem;
  color: var(--muted);
}

.benefits li {
  margin: 0 0 0.55rem;
}

.benefits li:last-child {
  margin-bottom: 0;
}

body.doc {
  place-items: start center;
  align-content: start;
  padding-top: clamp(1.5rem, 4vw, 3rem);
  padding-bottom: 3rem;
}

.help {
  text-align: left;
}

.help .brand,
.help .lead,
.help .crumb {
  text-align: center;
}

.help .crumb {
  margin: 0 0 0.75rem;
  font-size: 0.95rem;
}

.help .lead {
  margin-bottom: 1.25rem;
}

.toc {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.45rem 0.7rem;
  margin: 0 0 1.5rem;
  padding: 0.85rem 0.75rem;
  border: 1px solid var(--line);
  background: var(--soft);
}

.toc a {
  font-size: 0.95rem;
  text-decoration: none;
}

.toc a:hover,
.toc a:focus-visible {
  text-decoration: underline;
}

.guide {
  margin: 0 0 1rem;
  padding: 1rem 1.05rem 0.85rem;
  border: 1px solid var(--line);
  background: color-mix(in srgb, var(--fg) 2.5%, transparent);
}

.guide h2 {
  margin-top: 0;
}

.help ul,
.help ol {
  margin: 0 0 0.75rem;
  padding-left: 1.25rem;
  color: var(--muted);
}

.help li {
  margin: 0 0 0.4rem;
}

.help pre {
  margin: 0.35rem 0 0.75rem;
  padding: 0.85rem 1rem;
  overflow-x: auto;
  text-align: left;
  font-size: 0.9rem;
  line-height: 1.45;
  background: color-mix(in srgb, var(--fg) 6%, transparent);
  border: 1px solid var(--line);
}

.help pre code {
  font-size: inherit;
}