:root {
  --ink: #17202b;
  --signal: #e3262e;
  --paper: #f3f5f8;
  --surface: #ffffff;
  --line: #dde2e8;
  --muted: #5e6977;
  --key-edge: #c3cad3;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --ink: #e8edf2;
    --signal: #ff5a5f;
    --paper: #101820;
    --surface: #18222d;
    --line: #2a3644;
    --muted: #97a3b1;
    --key-edge: #0a1017;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 17px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  -webkit-font-smoothing: antialiased;
}

main, header, footer {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 20px;
}

a { color: var(--signal); }
a:focus-visible { outline: 2px solid var(--signal); outline-offset: 2px; }

header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-top: 24px;
}

header a { color: inherit; text-decoration: none; font-weight: 700; }
header img { width: 40px; height: 40px; border-radius: 10px; }
header nav { margin-left: auto; display: flex; gap: 16px; font-size: 15px; }
header nav a { font-weight: 500; color: var(--muted); }

.hero { padding: 56px 0 32px; }
.hero img { width: 96px; height: 96px; border-radius: 22px; }
h1 { font-size: clamp(32px, 7vw, 48px); line-height: 1.1; letter-spacing: -0.03em; margin: 24px 0 12px; }
h2 { font-size: 22px; letter-spacing: -0.01em; margin: 40px 0 8px; }
h3 { font-size: 17px; margin: 24px 0 4px; }
.lead { font-size: 20px; color: var(--muted); margin: 0 0 28px; }

/* Keycaps, as in the app */
.keys { display: flex; flex-wrap: wrap; gap: 8px; margin: 0 0 32px; padding: 0; list-style: none; }
.keys li {
  padding: 8px 12px;
  border: 1px solid var(--key-edge);
  border-bottom-width: 4px;
  border-radius: 8px;
  background: var(--surface);
  font: 600 15px/1 ui-monospace, "JetBrains Mono", monospace;
}

.play {
  display: inline-block;
  padding: 14px 22px;
  border-radius: 10px;
  background: var(--ink);
  color: var(--paper);
  font-weight: 600;
  text-decoration: none;
}

.langs { display: flex; gap: 8px; margin: 24px 0 8px; }
.langs a {
  padding: 6px 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--ink);
  text-decoration: none;
  font-size: 15px;
}

section[lang] { border-top: 1px solid var(--line); padding-top: 8px; margin-top: 32px; }
.updated { color: var(--muted); font-size: 15px; }

footer {
  margin-top: 64px;
  padding-bottom: 32px;
  color: var(--muted);
  font-size: 15px;
}