/* potatoGuts — static, system fonts only */
:root{
  --ink:#1f1b16;--ink-2:#4a443b;--muted:#6e665a;
  --paper:#fbf9f5;--paper-2:#f3efe7;--card:#ffffff;
  --line:#e6dfd2;--line-2:#d6ccba;
  --accent:#9a4a12;--accent-ink:#7a3a0d;--gold:#e8b45a;
  --radius:14px;--measure:40em;
  --sans:system-ui,-apple-system,"Hiragino Sans","Hiragino Kaku Gothic ProN","Noto Sans JP","Yu Gothic UI","Meiryo",sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:24px}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
body{margin:0;color:var(--ink);background:var(--paper);font-family:var(--sans);font-size:16px;line-height:1.9;
  font-feature-settings:"palt" 0;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;
  line-break:strict;overflow-wrap:anywhere;display:flex;flex-direction:column;min-height:100vh}
main{flex:1 0 auto;width:100%}
.wrap{max-width:1080px;margin:0 auto;padding:0 24px}
a{color:var(--accent);text-decoration-thickness:1px;text-underline-offset:.22em}
a:hover{color:var(--accent-ink);text-decoration-thickness:2px}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:4px}
.skip{position:absolute;left:-999px;top:8px;background:var(--ink);color:#fff;padding:8px 14px;border-radius:8px;z-index:10}
.skip:focus{left:12px}

/* header */
.site-header{border-bottom:1px solid var(--line);background:rgba(251,249,245,.92)}
.site-header .wrap{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:6px 24px;min-height:64px;padding-top:10px;padding-bottom:10px}
.brand{display:inline-flex;align-items:center;gap:10px;font-weight:700;letter-spacing:-.01em;color:var(--ink);text-decoration:none;font-size:1.06rem}
.brand:hover{color:var(--ink)}
.brand img{width:28px;height:28px;border-radius:8px}
nav{display:flex;flex-wrap:wrap;gap:4px 22px}
nav a{color:var(--ink-2);text-decoration:none;font-size:.9rem;padding:4px 0;border-bottom:1px solid transparent}
nav a:hover{color:var(--ink);border-bottom-color:var(--ink)}
nav a[aria-current="page"]{color:var(--ink);border-bottom-color:var(--accent)}

/* type */
h1,h2,h3{color:var(--ink);font-weight:700;letter-spacing:-.01em}
h1{font-size:clamp(1.7rem,1.2rem + 2vw,2.3rem);line-height:1.35;margin:0 0 .4em}
h2{font-size:1.2rem;line-height:1.5;margin:2.6em 0 .7em}
h3{font-size:1.02rem;margin:1.8em 0 .5em}
p{margin:0 0 1em}
.small{font-size:.85rem;color:var(--muted)}
.meta{color:var(--muted);font-size:.88rem;line-height:1.8}

/* home */
.home main{display:flex;align-items:center}
.home .hero{width:100%}
.hero{padding:clamp(56px,10vw,128px) 0 clamp(40px,7vw,88px)}
.eyebrow{display:inline-flex;align-items:center;gap:8px;margin:0 0 28px;font-size:.8rem;letter-spacing:.14em;text-transform:uppercase;color:var(--muted)}
.eyebrow::before{content:"";width:8px;height:8px;border-radius:50%;background:var(--gold)}
.display{font-size:clamp(2.6rem,1.4rem + 5.6vw,5.4rem);line-height:1.02;letter-spacing:-.035em;margin:0 0 .35em;font-weight:800}
.display span{color:var(--accent)}
.lead{font-size:clamp(1.02rem,.96rem + .3vw,1.18rem);color:var(--ink-2);max-width:31em;line-height:1.95;margin:0}
.index{list-style:none;margin:clamp(40px,6vw,72px) 0 0;padding:0;border-top:1px solid var(--line-2);max-width:720px}
.index li{border-bottom:1px solid var(--line)}
.index a{display:grid;grid-template-columns:3.2em 1fr auto;align-items:baseline;gap:12px;padding:18px 4px;color:var(--ink);text-decoration:none}
.index .n{font-size:.78rem;color:var(--muted);font-variant-numeric:tabular-nums;letter-spacing:.06em}
.index .t{font-weight:600;font-size:1.04rem}
.index .t small{display:block;font-weight:400;font-size:.86rem;color:var(--muted);margin-top:2px}
.index .arrow{color:var(--muted);transition:transform .2s ease,color .2s ease}
.index a:hover .arrow{transform:translateX(4px);color:var(--accent)}
.index a:hover .t{color:var(--accent-ink)}

/* documents */
.doc-layout{display:grid;grid-template-columns:minmax(0,1fr);gap:0 56px;padding:clamp(32px,6vw,64px) 0 72px}
@media (min-width:980px){.doc-layout{grid-template-columns:230px minmax(0,var(--measure))}.doc-layout.single{grid-template-columns:minmax(0,var(--measure))}}
.doc-head{grid-column:1/-1;margin-bottom:28px;padding-bottom:24px;border-bottom:1px solid var(--line-2);max-width:calc(230px + 56px + var(--measure))}
.doc-head .eyebrow{margin-bottom:14px}
.toc{font-size:.86rem;line-height:1.6}
.toc details{border:1px solid var(--line);border-radius:var(--radius);background:var(--card);padding:4px 16px;margin-bottom:28px}
.toc summary{cursor:pointer;padding:10px 0;font-weight:600;color:var(--ink);list-style-position:inside}
.toc ol{list-style:none;margin:0;padding:4px 0 12px}
.toc li{margin:0}
.toc a{display:block;padding:6px 0 6px 12px;border-left:2px solid var(--line);color:var(--ink-2);text-decoration:none}
.toc a:hover{color:var(--ink);border-left-color:var(--accent)}
@media (min-width:980px){
  .toc{position:sticky;top:24px;align-self:start;max-height:calc(100vh - 48px);overflow:auto}
  .toc details{border:0;background:none;padding:0}
  .toc summary{pointer-events:none;list-style:none;font-size:.75rem;letter-spacing:.12em;color:var(--muted);text-transform:uppercase;padding:0 0 10px}
  .toc summary::-webkit-details-marker{display:none}
}
.doc{max-width:var(--measure);min-width:0}
.doc>h2:first-child,.doc>h2:first-of-type{margin-top:0}
.doc h2{padding-top:.2em;border-top:1px solid var(--line);padding-top:1.4em}
.doc>h2:first-child{border-top:0;padding-top:0}
.doc ol,.doc ul{padding-left:1.5em;margin:0 0 1em}
.doc li{margin:.45em 0;padding-left:.15em}
.doc li::marker{color:var(--muted)}
.doc ol.sub{list-style:lower-roman;margin-top:.4em}
.doc strong{font-weight:700;background:linear-gradient(transparent 62%,rgba(232,180,90,.32) 62%)}
.meta.end{margin-top:3.5em;padding-top:1.4em;border-top:1px solid var(--line);text-align:left}
.summary-box{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:20px 24px 8px;margin:0 0 8px}
.summary-box h2{border:0;padding:0;margin:0 0 .5em;font-size:1rem}

/* tables */
.table{overflow-x:auto;margin:1.2em 0 1.6em;border:1px solid var(--line);border-radius:12px;background:var(--card)}
table{border-collapse:collapse;width:100%;font-size:.9rem;line-height:1.7}
th,td{padding:12px 14px;text-align:left;vertical-align:top;border-bottom:1px solid var(--line)}
tr:last-child th,tr:last-child td{border-bottom:0}
thead th{font-size:.78rem;letter-spacing:.06em;color:var(--muted);font-weight:600;background:var(--paper-2);white-space:nowrap}
table.kv th{width:9.5em;color:var(--muted);font-weight:600;font-size:.86rem;white-space:nowrap}

.button{display:inline-flex;align-items:center;gap:8px;background:var(--ink);color:#fff;text-decoration:none;padding:12px 22px;border-radius:999px;font-weight:600;font-size:.95rem}
.button:hover{background:var(--accent-ink);color:#fff}

/* footer */
.site-footer{border-top:1px solid var(--line-2);font-size:.86rem;color:var(--muted)}
.site-footer .wrap{display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px 32px;padding-top:28px;padding-bottom:36px}
.site-footer p{margin:0}
.site-footer .links{display:flex;flex-wrap:wrap;gap:4px 20px}
.site-footer a{color:var(--ink-2);text-decoration:none}
.site-footer a:hover{color:var(--ink);text-decoration:underline}
.site-footer .fine{flex-basis:100%;font-size:.8rem}

@media (max-width:600px){
  body{font-size:15.5px;line-height:1.85}
  .wrap{padding:0 20px}
  nav{gap:4px 16px}
  .index a{grid-template-columns:2.4em 1fr auto;padding:16px 2px}
  table.kv th{width:auto;white-space:normal}
  .site-footer .wrap{flex-direction:column}
}
@media print{.site-header nav,.toc,.site-footer .links{display:none}body{background:#fff}.doc-layout{display:block}}
.actions{margin-top:32px}