/* HANRIA — restrained Japanese-influenced typography.
   Sumi ink on washi, a single vermillion seal accent, hairline rules, generous ma. */
:root{
  --paper:#f7f5f0; --ink:#1c1a17; --ink-soft:#63605a; --hairline:#ddd8cd;
  --card:#fffefb; --shu:#b7410e;            /* shu-iro, traditional vermillion */
  --shu-soft:#f0e3dc; --band:#f2efe7;
  --mono:ui-monospace,SFMono-Regular,Menlo,monospace;
  --sans:-apple-system,BlinkMacSystemFont,"Hiragino Sans","Noto Sans JP","Segoe UI",system-ui,sans-serif;
  --serif:"Hiragino Mincho ProN","Yu Mincho","Noto Serif JP",Georgia,"Times New Roman",serif;
}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){
  --paper:#141311; --ink:#ece8df; --ink-soft:#9c988e; --hairline:#2e2b26;
  --card:#1b1916; --shu:#d4623a; --shu-soft:#2a1d17; --band:#1a1815;}}
:root[data-theme="dark"]{--paper:#141311;--ink:#ece8df;--ink-soft:#9c988e;--hairline:#2e2b26;--card:#1b1916;--shu:#d4623a;--shu-soft:#2a1d17;--band:#1a1815}
*{box-sizing:border-box}
body{background:var(--paper);color:var(--ink);font:16px/1.8 var(--sans);margin:0;-webkit-font-smoothing:antialiased}
.wrap{max-width:70ch;margin:0 auto;padding:0 28px}

/* seal mark — a hanko-like vermillion square holding the wordmark */
.seal{display:inline-flex;align-items:center;justify-content:center;width:34px;height:34px;
  background:var(--shu);color:#fff;font:700 15px/1 var(--mono);border-radius:3px;letter-spacing:0}
header.site{padding:26px 0 0}
header.site .row{display:flex;align-items:center;gap:14px;flex-wrap:wrap}
.mark{font:600 19px/1 var(--mono);letter-spacing:.22em}
.status{font:500 11px/1 var(--mono);letter-spacing:.14em;text-transform:uppercase;color:var(--shu);
  border:1px solid var(--shu);padding:5px 8px;border-radius:2px}
.langs{margin-left:auto;font-size:13px;display:flex;gap:14px}
.langs a{color:var(--ink-soft);text-decoration:none;padding-bottom:2px;border-bottom:1px solid transparent}
.langs a:hover{color:var(--ink)}
.langs a[aria-current]{color:var(--ink);border-bottom-color:var(--shu)}
.rule{height:1px;background:var(--hairline);margin:22px 0 0}

.banner{background:var(--band);border-bottom:1px solid var(--hairline);padding:14px 0;font-size:14px}
.banner strong{color:var(--shu)}

main{padding-top:14px}
.kicker{color:var(--shu);font:500 12px/1 var(--mono);letter-spacing:.18em;text-transform:uppercase;
  margin:4.2em 0 .9em;display:flex;align-items:center;gap:12px}
.kicker::after{content:"";flex:1;height:1px;background:var(--hairline)}
h1{font-family:var(--serif);font-weight:400;font-size:clamp(30px,5.4vw,46px);line-height:1.3;
  letter-spacing:.01em;margin:.5em 0 .45em}
h2{font-family:var(--serif);font-weight:400;font-size:clamp(21px,3.1vw,29px);line-height:1.45;margin:0 0 .6em}
h3{font-size:16px;font-weight:600;margin:1.9em 0 .25em;letter-spacing:.01em}
.lede{font-size:18px;color:var(--ink-soft);line-height:1.85}
p{margin:.85em 0}
section{padding-bottom:.4em}

.grid{display:grid;gap:1px;background:var(--hairline);border:1px solid var(--hairline);margin:1.6em 0}
@media(min-width:620px){.grid{grid-template-columns:1fr 1fr}}
.card{background:var(--card);padding:20px 22px}
.card h3{margin:0 0 .35em}
.card p{margin:0;font-size:15px;color:var(--ink-soft)}

ol.steps{list-style:none;counter-reset:s;padding:0;margin:1.6em 0}
ol.steps li{counter-increment:s;display:grid;grid-template-columns:auto 1fr;gap:0 18px;
  padding:0 0 1.6em 0;align-items:start}
ol.steps li::before{content:counter(s,decimal-leading-zero);color:var(--shu);
  font:500 12px/1.9 var(--mono);letter-spacing:.08em;border-right:1px solid var(--hairline);padding-right:18px}
ol.steps h3{margin:0 0 .2em;grid-column:2}
ol.steps p{margin:0;color:var(--ink-soft);font-size:15px;grid-column:2}
ol.steps li>*:nth-child(n){grid-column:2}

.bounds{list-style:none;padding:0;margin:1.4em 0;border-top:1px solid var(--hairline)}
.bounds li{border-bottom:1px solid var(--hairline);padding:14px 0 14px 22px;font-size:15px;
  color:var(--ink-soft);position:relative}
.bounds li::before{content:"—";position:absolute;left:0;color:var(--shu)}
.bounds strong{color:var(--ink)}

details{border-bottom:1px solid var(--hairline);padding:16px 0}
details summary{cursor:pointer;font-weight:600;font-size:16px;list-style:none}
details summary::-webkit-details-marker{display:none}
details summary::before{content:"＋";color:var(--shu);margin-right:10px;font-size:13px}
details[open] summary::before{content:"−"}
details p{color:var(--ink-soft);font-size:15px;margin:.7em 0 0 24px}

footer.site{border-top:1px solid var(--hairline);margin-top:5em;padding:32px 0 60px;font-size:13.5px;color:var(--ink-soft)}
footer.site .row{display:flex;align-items:center;gap:12px;margin-bottom:1em}
footer.site .mark{font-size:15px;color:var(--ink)}

:lang(ja),:lang(zh),:lang(ko){line-height:1.95}
:lang(ja) h1,:lang(zh) h1,:lang(ko) h1,:lang(ja) h2,:lang(zh) h2,:lang(ko) h2{letter-spacing:.03em}

.open-q{color:var(--ink-soft);font-weight:400}

footer.site a,main a{color:var(--shu);text-decoration:none;border-bottom:1px solid var(--shu-soft)}
footer.site a:hover,main a:hover{border-bottom-color:var(--shu)}
code{font:.92em/1 var(--mono);background:var(--card);border:1px solid var(--hairline);padding:2px 5px;border-radius:3px}