:root {
  --bg: #f6faf7;
  --surface: #ffffff;
  --text: #16231b;
  --muted: #576a5f;
  --border: #e4ede7;
  --accent: #12863d;
  --accent-ink: #0c5f2c;
  --accent-soft: #e7f4ec;
  --card-green: #e3f3e9;
  --card-green-ink: #14231b;
  --pill: #f0f3f1;
  --tile-red: #c62828;
  --radius: 16px;
  --maxw: 720px;
  --font: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Yu Gothic", "YuGothic", Meiryo, system-ui, sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg:#0f1411; --surface:#171e19; --text:#e8efe9; --muted:#9db0a4; --border:#263029;
    --accent:#34d266; --accent-ink:#7fe6a1; --accent-soft:#17281d;
    --card-green:#16281d; --card-green-ink:#eafaef; --pill:#1c241f;
  }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); font-family: var(--font); line-height: 1.75; -webkit-font-smoothing: antialiased; }
.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 22px 96px; }

/* header */
header.site { padding: 44px 0 26px; border-bottom: 1px solid var(--border); margin-bottom: 34px; }
.brand { display: flex; align-items: center; gap: 14px; }
.tile { width: 40px; height: 52px; border-radius: 9px; background:#fff; border:1px solid #dfe6e0; display: grid; place-items: center; box-shadow: 0 3px 10px rgba(0,0,0,.12); flex: none; }
.tile span { color: var(--tile-red); font-weight: 800; font-size: 26px; line-height: 1; }
.app { color: var(--muted); font-size: 12.5px; margin: 2px 0 0; }
.brand-name { font-weight: 700; font-size: 15px; letter-spacing: .02em; }
h1 { font-size: clamp(28px, 6vw, 38px); font-weight: 800; letter-spacing: -.01em; margin: 24px 0 6px; text-wrap: balance; }
.updated { color: var(--muted); font-size: 13.5px; margin: 0; }
.lead { color: var(--muted); font-size: 16px; }

/* text */
h2 { font-size: 19px; font-weight: 700; margin: 38px 0 10px; padding-left: 13px; border-left: 3px solid var(--accent); }
p, li { font-size: 16px; }
p { margin: 12px 0; }
.muted { color: var(--muted); }
ul, ol { padding-left: 22px; margin: 12px 0; }
li { margin: 7px 0; }
a { color: var(--accent-ink); text-decoration: underline; text-underline-offset: 2px; }
a:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 3px; }
strong { font-weight: 700; }

.note { background: var(--accent-soft); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px 18px; margin: 20px 0; font-size: 15px; }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 6px 20px 18px; margin: 16px 0; }
.back { display: inline-block; margin-top: 40px; color: var(--muted); font-size: 14px; text-decoration: none; }
.back:hover { color: var(--text); }
footer.site { margin-top: 52px; padding-top: 22px; border-top: 1px solid var(--border); color: var(--muted); font-size: 13px; }

/* hub cards (index) */
.card-links { display: grid; gap: 14px; margin: 24px 0; }
.card-links a { display: block; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 18px 20px; text-decoration: none; color: var(--text); }
.card-links a:hover { border-color: var(--accent); }
.card-links .t { font-weight: 700; font-size: 17px; }
.card-links .d { color: var(--muted); font-size: 14px; margin-top: 4px; }

/* FAQ (support) */
.faq { list-style: none; padding: 0; margin: 14px 0 0; display: flex; flex-direction: column; gap: 12px; }
details { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; }
summary { cursor: pointer; padding: 16px 18px; font-weight: 700; font-size: 16px; list-style: none; display: flex; justify-content: space-between; align-items: center; gap: 12px; }
summary::-webkit-details-marker { display: none; }
summary::after { content: "＋"; color: var(--accent); font-weight: 700; flex: none; }
details[open] summary::after { content: "－"; }
details .body { padding: 0 18px 16px; font-size: 15.5px; }
details .body p { margin: 6px 0; }
summary:focus-visible { outline: 2px solid var(--accent); outline-offset: -2px; }

/* hero (index) */
.hero-card { background: var(--card-green); color: var(--card-green-ink); border-radius: 18px; padding: 18px 20px; max-width: 320px; margin: 8px 0 22px; }
.hero-card .row { display: flex; justify-content: space-between; align-items: center; }
.hero-card .han { color: var(--muted); font-size: 13px; }
.hero-card .rank { background: rgba(18,134,61,.16); color: var(--accent); font-weight: 700; font-size: 12px; padding: 3px 10px; border-radius: 999px; }
.hero-card .score { font-size: 32px; font-weight: 800; text-align: center; margin: 8px 0 2px; }
.features { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; margin: 8px 0; }
@media (max-width: 560px) { .features { grid-template-columns: 1fr; } }
.feat { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 18px; }
.feat h3 { margin: 0 0 5px; font-size: 16px; }
.feat p { margin: 0; color: var(--muted); font-size: 14px; }
.cta { display: inline-flex; align-items:center; gap: 8px; background: var(--accent); color: #fff; font-weight: 700; font-size: 15px; padding: 12px 22px; border-radius: 999px; text-decoration: none; }

table { width: 100%; border-collapse: collapse; margin: 14px 0; font-size: 14.5px; }
th, td { text-align: left; padding: 9px 10px; border-bottom: 1px solid var(--border); vertical-align: top; }
th { color: var(--muted); font-weight: 600; font-size: 12.5px; }
.scroll { overflow-x: auto; }