:root{color-scheme:light;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:#18202c;background:#f8f9fb}*{box-sizing:border-box}body{margin:0}a{color:#253fdd;text-underline-offset:3px}a:focus-visible{outline:2px solid #253fdd;outline-offset:4px}header,main,footer{max-width:1080px;margin:auto;padding:24px}header{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;border-bottom:1px solid #dfe3eb}nav{display:flex;gap:20px;flex-wrap:wrap}.brand{font-weight:700;text-decoration:none;font-size:22px}h1{font-size:clamp(36px,6vw,56px);letter-spacing:-.04em;margin:32px 0 12px}h2{font-size:23px;line-height:1.35;scroll-margin-top:24px}p,li{font-size:16px;line-height:1.8;overflow-wrap:anywhere}.meta{color:#626b79}.notice{background:#fff4d9;border-left:3px solid #b57912;padding:14px 18px}.layout{display:grid;grid-template-columns:230px minmax(0,1fr);gap:48px;margin-top:36px}.contents{align-self:start;position:sticky;top:24px}.contents ol{padding-left:22px}.contents li{font-size:14px;margin:8px 0}section{margin-bottom:36px}footer{border-top:1px solid #dfe3eb;color:#626b79;font-size:13px}article{min-width:0}@media(max-width:760px){.layout{grid-template-columns:minmax(0,1fr);gap:24px}.contents{position:static}header,main,footer{padding:20px}}