:root {
  --ink: #1b1b1b;
  --paper: #ffffff;
  --muted: #5f5f5f;
  --line: rgba(27, 27, 27, 0.14);
  --accent: #1b1b1b;
  --tint: #f4f4f4;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "Hiragino Sans", "Yu Gothic", "Noto Sans JP", system-ui, sans-serif;
  line-height: 1.85;
  -webkit-text-size-adjust: 100%;
}

.shell {
  max-width: 44rem;
  margin: 0 auto;
  padding: clamp(2rem, 6vw, 4.5rem) clamp(1.25rem, 5vw, 2rem) 5rem;
}

.eyebrow {
  margin: 0 0 0.75rem;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  color: var(--muted);
  text-transform: uppercase;
}

h1 {
  margin: 0 0 0.5rem;
  font-size: clamp(1.75rem, 5vw, 2.5rem);
  line-height: 1.3;
  letter-spacing: -0.01em;
}

h2 {
  margin: 2.75rem 0 0.5rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--line);
  font-size: 1.1rem;
  letter-spacing: 0.01em;
}

h3 {
  margin: 1.75rem 0 0.25rem;
  font-size: 0.98rem;
}

p,
ul {
  margin: 0.5rem 0 0;
}

ul {
  padding-left: 1.25rem;
}

li {
  margin: 0.2rem 0;
}

a {
  color: var(--accent);
  text-underline-offset: 0.18em;
}

a:hover {
  text-decoration-thickness: 2px;
}

.lede {
  margin-top: 1rem;
  color: var(--muted);
}

.back {
  display: inline-block;
  margin-bottom: 2rem;
  font-size: 0.9rem;
  text-decoration: none;
  color: var(--muted);
}

.back:hover {
  color: var(--ink);
  text-decoration: underline;
}

.apps {
  margin: 1.5rem 0 0;
  padding: 0;
  list-style: none;
}

.apps li {
  padding: 0.9rem 1rem;
  border: 1px solid var(--line);
  border-radius: 0.5rem;
  margin-bottom: 0.6rem;
  background: var(--tint);
}

.apps .platform {
  display: block;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--muted);
}

.updated {
  margin-top: 3.5rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--line);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  color: var(--muted);
}

@media (prefers-color-scheme: dark) {
  :root {
    --ink: #ececec;
    --paper: #141414;
    --muted: #a0a0a0;
    --line: rgba(236, 236, 236, 0.18);
    --accent: #ececec;
    --tint: #1e1e1e;
  }
}