:root {
  --path: #00e600;
  --lock: #ff2600;
  --text: #111;
  --muted: #666;
  --bg: #fafafa;
  --card: #fff;
  --line: rgba(0, 0, 0, 0.1);
}

@media (prefers-color-scheme: dark) {
  :root {
    --text: #f2f2f2;
    --muted: #aaa;
    --bg: #111;
    --card: #1c1c1e;
    --line: rgba(255, 255, 255, 0.12);
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: ui-rounded, "SF Pro Rounded", system-ui, -apple-system, "Segoe UI", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.55;
}

main {
  max-width: 720px;
  margin: 0 auto;
  padding: 48px 24px 32px;
}

a { color: inherit; }

/* Title: "black&white" with a bold ampersand, as in the game. */
.title {
  font-size: clamp(2.6rem, 9vw, 4rem);
  font-weight: 300;
  letter-spacing: -0.01em;
  margin: 16px 0 4px;
  text-align: center;
}
.title b { font-weight: 800; }

.tagline {
  text-align: center;
  font-size: 1.25rem;
  color: var(--muted);
  margin: 0 0 32px;
}

.icon {
  display: block;
  width: 160px;
  height: 160px;
  margin: 0 auto;
}

.cta {
  display: flex;
  justify-content: center;
  margin: 0 0 48px;
}

/* Apple's badge, at a size that suits the page (Apple asks for at least 40 px tall on screen). */
.badge img {
  display: block;
  height: 60px;
  width: auto;
}

section {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 24px 28px;
  margin: 0 0 20px;
}

h2 { margin: 0 0 8px; font-size: 1.3rem; }
h3 { margin: 20px 0 4px; font-size: 1.05rem; }

ul { padding-left: 1.2em; margin: 8px 0 0; }
li { margin: 4px 0; }

.swatch {
  display: inline-block;
  width: 0.8em;
  height: 0.8em;
  border-radius: 0.2em;
  vertical-align: -0.05em;
  margin-right: 0.3em;
}

footer {
  text-align: center;
  color: var(--muted);
  font-size: 0.9rem;
  padding: 8px 24px 40px;
}
footer a { margin: 0 8px; }

.back { display: inline-block; margin-bottom: 16px; color: var(--muted); }