:root {
  --bg: #fbfbfa;
  --bg-soft: #f2f3f1;
  --fg: #1c1f1e;
  --muted: #5d6662;
  --line: #e1e4e1;
  --accent: #0f766e;
  --accent-fg: #ffffff;
  --accent-soft: #e3f2ef;
  --typo: #c2410c;
  --radius: 14px;
  --sans: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Noto Sans JP", sans-serif;
  --mono: ui-monospace, "SF Mono", Menlo, monospace;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111413;
    --bg-soft: #1a1e1d;
    --fg: #e8ecea;
    --muted: #9aa5a0;
    --line: #2a302e;
    --accent: #2dd4bf;
    --accent-fg: #062b27;
    --accent-soft: #12302c;
    --typo: #fb923c;
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--sans);
  line-height: 1.75;
  font-feature-settings: "palt";
}
a { color: var(--accent); }
.wrap { max-width: 960px; margin: 0 auto; padding: 0 20px; }

header.site { border-bottom: 1px solid var(--line); }
header.site .wrap { display: flex; align-items: center; justify-content: space-between; height: 60px; }
.brand { font-weight: 700; font-size: 1.15rem; color: var(--fg); text-decoration: none; letter-spacing: 0.02em; }
header.site nav a { color: var(--muted); text-decoration: none; margin-left: 20px; font-size: 0.92rem; }
header.site nav a:hover { color: var(--fg); }

.hero { padding-top: 72px; padding-bottom: 56px; text-align: center; }
.hero h1 { font-size: clamp(2rem, 5vw, 3rem); line-height: 1.3; margin: 0 0 12px; letter-spacing: 0.01em; }
.hero p.lead { font-size: 1.1rem; color: var(--muted); margin: 0 auto 32px; max-width: 34em; }
.cta { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.note { color: var(--muted); font-size: 0.85rem; margin-top: 12px; }

.button {
  display: inline-block; padding: 12px 24px; border-radius: 999px; font-weight: 600;
  text-decoration: none; border: 1px solid var(--accent); transition: opacity 0.15s;
}
.button:hover { opacity: 0.85; }
.button.primary { background: var(--accent); color: var(--accent-fg); }
.button.secondary { color: var(--accent); background: transparent; }

.demo {
  margin: 48px auto 0; max-width: 520px; background: var(--bg-soft); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 28px 24px; text-align: left; min-height: 150px;
}
.demo .ctx { color: var(--muted); font-size: 0.9rem; min-height: 1.6em; }
.demo .typed { font-family: var(--mono); font-size: 1.35rem; min-height: 2em; }
.demo .typed .t { color: var(--typo); text-decoration: underline wavy; text-underline-offset: 5px; }
.demo .typed .caret { display: inline-block; width: 2px; height: 1.2em; background: var(--fg); vertical-align: -0.2em; animation: blink 1s steps(1) infinite; }
.demo .out { font-size: 1.6rem; font-weight: 600; min-height: 1.6em; opacity: 0; transition: opacity 0.3s; }
.demo .out.on { opacity: 1; }
.demo .out::before { content: "→ "; color: var(--muted); font-weight: 400; }
@keyframes blink { 50% { opacity: 0; } }
@media (prefers-reduced-motion: reduce) { .demo .typed .caret { animation: none; } }

section { padding: 56px 0; border-top: 1px solid var(--line); }
section h2 { font-size: 1.6rem; margin: 0 0 8px; }
section p.sub { color: var(--muted); margin: 0 0 28px; }

.features { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 16px; }
.card { background: var(--bg-soft); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; }
.card h3 { margin: 0 0 6px; font-size: 1.05rem; }
.card p { margin: 0; color: var(--muted); font-size: 0.95rem; }
code, .mono { font-family: var(--mono); font-size: 0.92em; }

.table-scroll { overflow-x: auto; }
table { border-collapse: collapse; width: 100%; font-size: 0.95rem; }
th, td { padding: 10px 12px; border-bottom: 1px solid var(--line); text-align: left; white-space: nowrap; }
th { color: var(--muted); font-weight: 600; }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; }
td.best { color: var(--accent); font-weight: 700; }
.caption { color: var(--muted); font-size: 0.85rem; margin-top: 10px; }

.pricing { max-width: 440px; margin: 0 auto; text-align: center; }
.price { font-size: 2.6rem; font-weight: 700; margin: 4px 0; }
.pricing ul { text-align: left; padding-left: 1.2em; color: var(--muted); }

ol.steps { padding-left: 1.4em; }
ol.steps li { margin-bottom: 8px; }

details { border-bottom: 1px solid var(--line); padding: 14px 0; }
details summary { cursor: pointer; font-weight: 600; }
details p { color: var(--muted); margin: 8px 0 0; }

footer.site { border-top: 1px solid var(--line); padding: 32px 0 48px; color: var(--muted); font-size: 0.85rem; }
footer.site nav a { color: var(--muted); margin-right: 18px; }

.doc { padding-top: 48px; padding-bottom: 64px; max-width: 760px; }
.doc h1 { font-size: 1.8rem; margin: 0 0 24px; }
.doc h2 { font-size: 1.15rem; margin: 32px 0 8px; border: 0; padding: 0; }
.doc table th { width: 30%; white-space: normal; vertical-align: top; }
.doc table td { white-space: normal; }
.todo { background: #fde68a; color: #422006; padding: 0 4px; border-radius: 4px; }

.key-box { display: flex; gap: 8px; align-items: stretch; margin: 12px 0 20px; }
.key-box code {
  flex: 1; display: block; padding: 12px; background: var(--bg-soft); border: 1px solid var(--line);
  border-radius: 8px; word-break: break-all; font-size: 0.85rem;
}
.key-box button {
  border: 1px solid var(--accent); background: var(--accent); color: var(--accent-fg);
  border-radius: 8px; padding: 0 16px; font-weight: 600; cursor: pointer; font-family: var(--sans);
}

@media (max-width: 600px) {
  header.site nav a:not(.keep) { display: none; }
  .hero { padding-top: 48px; padding-bottom: 40px; }
  .key-box { flex-direction: column; }
  .key-box button { padding: 10px; }
}