:root{color-scheme:light;--paper:#f5f3ed;--panel:#fffefa;--ink:#252b29;--muted:#657069;--line:#d5dbd2;--accent:#315d50;--soft:#e7eee7;--radius:12px;font-family:"Yu Gothic UI","Yu Gothic","Hiragino Sans","Meiryo",sans-serif;font-synthesis:none}
*{box-sizing:border-box}
html{scroll-behavior:smooth;background:var(--paper)}
body{margin:0;color:var(--ink);background:var(--paper);font-size:16px;line-height:1.85;letter-spacing:.025em;overflow-wrap:anywhere}
a{color:var(--accent);text-underline-offset:.24em}
button,input,select,textarea{font:inherit}
button,.button{display:inline-flex;align-items:center;justify-content:center;gap:.4em;min-height:46px;padding:.65em 1.2em;border:1px solid var(--accent);border-radius:8px;background:var(--accent);color:white;text-decoration:none;line-height:1.55;cursor:pointer;touch-action:manipulation}
button:hover,.button:hover{filter:brightness(.94)}
button:disabled{opacity:.5;cursor:default;filter:none}
button.secondary,.button.secondary{background:transparent;color:var(--accent);border-color:var(--line)}
button:focus-visible,a:focus-visible,summary:focus-visible,input:focus-visible,select:focus-visible,[tabindex]:focus-visible{outline:3px solid #b48a4a;outline-offset:4px}
[hidden]{display:none!important}
.shell{width:min(1100px,calc(100% - 64px));margin-inline:auto;padding-bottom:56px}
.site-header{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:26px 0 20px;border-bottom:1px solid var(--line)}
.back-link{font-size:14px;text-decoration:none;white-space:nowrap}
.eyebrow,.kicker{color:var(--muted);font-size:12px;letter-spacing:.15em;line-height:1.5}
h1{font-size:clamp(28px,4vw,46px);font-weight:500;letter-spacing:.055em;line-height:1.45;margin:34px 0 18px}
h2{font-size:clamp(19px,2.4vw,24px);font-weight:500;line-height:1.55;margin:0 0 15px}
h3{font-size:17px;font-weight:600;line-height:1.6}
p{margin:0 0 1.15em}
.lede{color:var(--muted);max-width:56em;margin-bottom:28px}
.panel{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:24px;margin-top:22px;min-width:0}
.actions{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-block:18px}
.muted{color:var(--muted)}
.note{font-size:14px;color:var(--muted);line-height:1.85}
.status{font-size:14px;font-variant-numeric:tabular-nums}
details{border-top:1px solid var(--line);padding-top:14px;margin-top:22px}
summary{cursor:pointer;font-size:14px;color:var(--muted);padding:8px 0;min-height:44px}
details p,details li{font-size:14px}
ul,ol{padding-left:1.5em}
canvas,svg,img{max-width:100%}
.footer{border-top:1px solid var(--line);margin-top:36px;padding-top:18px;color:var(--muted);font-size:13px}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.prototype-label{display:inline-block;font-size:12px;color:var(--muted);border:1px solid var(--line);border-radius:999px;padding:4px 11px;white-space:nowrap}
@media(max-width:600px){.shell{width:calc(100% - 32px);padding-bottom:34px}.site-header{padding-top:18px;gap:10px}.panel{padding:18px;margin-top:18px}h1{margin-top:26px}.actions{gap:8px}button,.button{padding:.7em 1em}.lede{font-size:15px}.eyebrow{font-size:11px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{animation:none!important;transition:none!important}}
@media print{body{background:white}.shell{width:100%}.panel{break-inside:avoid}button,.actions{display:none}}