:root {
  --bg: #fbfaf8;
  --surface: #ffffff;
  --ink: #1a1a1a;
  --ink-soft: #55524d;
  --line: #e6e2dc;
  --accent: #2f5d50;
  --radius: 14px;
  --measure: 42rem;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14141a;
    --surface: #1c1c23;
    --ink: #f2f0ed;
    --ink-soft: #a9a5a0;
    --line: #2e2e38;
    --accent: #7fbfa9;
  }
}

* {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font:
    400 17px/1.65 ui-sans-serif,
    system-ui,
    -apple-system,
    'Segoe UI',
    Inter,
    sans-serif;
}

.wrap {
  max-width: var(--measure);
  margin: 0 auto;
  padding: 3rem 1.25rem 5rem;
}

header.site {
  border-bottom: 1px solid var(--line);
}

header.site .wrap {
  padding: 1.25rem;
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
}

.brand {
  font-weight: 640;
  letter-spacing: -0.02em;
  font-size: 1.1rem;
  text-decoration: none;
  color: var(--ink);
}

nav a {
  color: var(--ink-soft);
  text-decoration: none;
  font-size: 0.9rem;
  margin-left: 1rem;
}

nav a:hover,
a:hover {
  color: var(--accent);
}

h1 {
  font-size: clamp(1.9rem, 5vw, 2.6rem);
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin: 0 0 0.75rem;
}

h2 {
  font-size: 1.2rem;
  letter-spacing: -0.01em;
  margin: 2.5rem 0 0.6rem;
}

h3 {
  font-size: 1rem;
  margin: 1.5rem 0 0.4rem;
}

p,
li {
  color: var(--ink-soft);
}

p {
  margin: 0 0 1rem;
}

.lede {
  font-size: 1.12rem;
  color: var(--ink);
}

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

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.25rem 1.4rem;
  margin: 1.25rem 0;
}

.companions {
  display: grid;
  gap: 0.75rem;
  grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr));
  margin: 1.5rem 0;
}

.companion {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1rem 1.1rem;
}

.companion strong {
  color: var(--ink);
  display: block;
  font-size: 1.02rem;
}

.companion .num {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.95rem;
  color: var(--accent);
  display: block;
  margin-top: 0.35rem;
}

.companion span.desc {
  font-size: 0.92rem;
}

.disclosure {
  border-left: 3px solid var(--accent);
  background: var(--surface);
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: 1rem 1.25rem;
  margin: 2rem 0;
  font-size: 0.95rem;
}

.disclosure strong {
  color: var(--ink);
}

.msg {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.88rem;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 0.7rem 0.9rem;
  margin: 0.5rem 0;
  color: var(--ink);
  white-space: pre-wrap;
}

footer.site {
  border-top: 1px solid var(--line);
  margin-top: 3rem;
}

footer.site .wrap {
  padding: 1.5rem 1.25rem;
  font-size: 0.87rem;
  color: var(--ink-soft);
}

.meta {
  font-size: 0.87rem;
  color: var(--ink-soft);
}

table {
  width: 100%;
  border-collapse: collapse;
  margin: 1rem 0;
  font-size: 0.93rem;
}

th,
td {
  text-align: left;
  padding: 0.55rem 0.6rem;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}

th {
  color: var(--ink);
  font-weight: 600;
}