/* OpenYuri — hand-written stylesheet. No framework, no CDN. */
:root{
  --ink:#1a1d21;
  --ink-soft:#414a54;
  --muted:#5b6470;
  --line:#d7dbe0;
  --line-soft:#e7eaee;
  --bg:#ffffff;
  --bg-alt:#f5f6f8;
  --accent:#1a5fb4;
  --accent-ink:#134a8c;
  --focus:#0b57d0;
  --maxw:46rem;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,"Noto Sans","Liberation Sans",sans-serif;
  font-size:clamp(1rem,0.95rem + 0.2vw,1.075rem);
  line-height:1.6;
  color:var(--ink);
  background:var(--bg);
}
a{color:var(--accent);text-decoration:underline;text-underline-offset:2px}
a:hover{color:var(--accent-ink)}
:focus-visible{outline:3px solid var(--focus);outline-offset:2px;border-radius:2px}
.skip-link{
  position:absolute;left:-999px;top:0;background:#fff;color:var(--ink);
  padding:.6rem 1rem;border:2px solid var(--focus);z-index:100
}
.skip-link:focus{left:.5rem;top:.5rem}

.wrap{max-width:var(--maxw);margin:0 auto;padding:0 1.25rem}
.wide{max-width:56rem}

/* Header / nav */
.site-header{border-bottom:1px solid var(--line);background:var(--bg)}
.site-header .wrap{display:flex;flex-wrap:wrap;align-items:center;gap:.5rem 1rem;padding-top:1rem;padding-bottom:1rem}
.brand{font-weight:700;font-size:1.15rem;letter-spacing:-0.01em;color:var(--ink);text-decoration:none}
.brand .dot{color:var(--accent)}
.nav{margin-left:auto;display:flex;flex-wrap:wrap;gap:.25rem 1rem}
.nav a{color:var(--ink-soft);text-decoration:none;padding:.25rem 0;font-weight:500}
.nav a:hover,.nav a[aria-current="page"]{color:var(--accent)}
.nav a[aria-current="page"]{border-bottom:2px solid var(--accent)}

/* Hero */
.hero{padding:2.5rem 0 1.75rem;border-bottom:1px solid var(--line-soft)}
.hero h1{font-size:clamp(1.6rem,1.2rem + 2vw,2.3rem);line-height:1.2;margin:0 0 .75rem;letter-spacing:-0.02em}
.lede{font-size:1.1rem;color:var(--ink-soft);margin:0 0 1.25rem;max-width:40rem}
.price-flag{
  display:inline-block;background:var(--bg-alt);border:1px solid var(--line);
  border-radius:8px;padding:.5rem .8rem;font-weight:600;color:var(--ink);margin:0 0 1.25rem
}
.cta{display:flex;flex-wrap:wrap;gap:.6rem}
.btn{
  display:inline-block;background:var(--accent);color:#fff;text-decoration:none;
  padding:.7rem 1.1rem;border-radius:8px;font-weight:600;border:1px solid var(--accent)
}
.btn:hover{background:var(--accent-ink);color:#fff;border-color:var(--accent-ink)}
.btn.secondary{background:#fff;color:var(--accent);border:1px solid var(--line)}
.btn.secondary:hover{background:var(--bg-alt);color:var(--accent-ink)}

/* Sections */
main{display:block}
section{padding:1.9rem 0;border-bottom:1px solid var(--line-soft)}
h2{font-size:1.4rem;line-height:1.25;margin:0 0 .9rem;letter-spacing:-0.01em}
h3{font-size:1.1rem;margin:1.2rem 0 .4rem}
p{margin:0 0 1rem}
ul,ol{margin:0 0 1rem;padding-left:1.35rem}
li{margin:.35rem 0}
.muted{color:var(--muted)}
small{color:var(--muted);font-size:.88rem}

/* Steps / cards */
.steps{list-style:none;padding:0;counter-reset:s;margin:0}
.steps li{
  counter-increment:s;position:relative;padding:.6rem 0 .6rem 2.6rem;border-top:1px solid var(--line-soft)
}
.steps li:last-child{border-bottom:1px solid var(--line-soft)}
.steps li::before{
  content:counter(s);position:absolute;left:0;top:.55rem;width:1.9rem;height:1.9rem;
  display:grid;place-items:center;background:var(--bg-alt);border:1px solid var(--line);
  border-radius:50%;font-weight:700;font-size:.9rem;color:var(--ink-soft)
}
.cards{display:grid;gap:1rem;margin:0}
.card{border:1px solid var(--line);border-radius:10px;padding:1.1rem 1.15rem;background:#fff}
.card h3{margin-top:0}
.card .ref{font-size:.95rem;word-break:break-word}
.grid-2{display:grid;gap:1.25rem}
@media(min-width:40rem){.grid-2{grid-template-columns:1fr 1fr}}

/* Definition table */
.dl{margin:0}
.dl dt{font-weight:600;margin-top:.9rem}
.dl dd{margin:.15rem 0 0 0;color:var(--ink-soft)}

/* Callout */
.note{background:var(--bg-alt);border:1px solid var(--line);border-left:4px solid var(--accent);
  border-radius:8px;padding:.9rem 1.1rem;margin:0 0 1.2rem}
.warn{border-left-color:#b45309}

/* Footer */
.site-footer{background:var(--bg-alt);border-top:1px solid var(--line);padding:1.6rem 0 2.2rem;margin-top:1rem}
.site-footer .wrap{display:flex;flex-wrap:wrap;gap:.4rem 1.25rem;align-items:baseline}
.site-footer nav{margin-left:auto;display:flex;gap:1rem;flex-wrap:wrap}
.site-footer a{color:var(--ink-soft)}
.disclosure{font-size:.88rem;color:var(--muted);max-width:44rem;margin:.75rem 0 0}
address{font-style:normal}
.tag{display:inline-block;font-size:.8rem;color:var(--muted);border:1px solid var(--line);
  border-radius:999px;padding:.1rem .6rem;background:#fff}
hr.sp{border:0;border-top:1px solid var(--line-soft);margin:1.4rem 0}