:root{color-scheme:light;--ink:#17211d;--muted:#5b6861;--line:#dce4df;--paper:#f4f7f5;--green:#16794c;--amber:#fff5de;--max:900px}*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font:16px/1.75 system-ui,-apple-system,"Hiragino Kaku Gothic ProN","Yu Gothic",Meiryo,sans-serif}a{color:#075d9b;text-underline-offset:3px}a:focus-visible{outline:3px solid #e6a500;outline-offset:3px}.wrap{max-width:var(--max);margin:auto;padding:0 22px}.head{padding:22px 0;border-bottom:1px solid var(--line);background:#fff}.brand{font-weight:750;letter-spacing:.06em;color:var(--ink);text-decoration:none}.nav{float:right;display:flex;gap:18px;flex-wrap:wrap}.nav a{font-size:.92rem}.crumb{font-size:.9rem;color:var(--muted);margin:22px 0}.article{background:#fff;border:1px solid var(--line);border-radius:10px;padding:clamp(20px,5vw,44px);margin:24px 0}.eyebrow{font-size:.78rem;letter-spacing:.14em;text-transform:uppercase;color:var(--green);font-weight:750}.hero-image{display:block;width:100%;height:auto;border-radius:8px;margin:18px 0}.concept-note,.meta,.small{font-size:.9rem;color:var(--muted)}.meta{border-bottom:1px solid var(--line);padding-bottom:18px}h1{font-size:clamp(1.8rem,5vw,2.65rem);line-height:1.32;margin:.45em 0}h2{font-size:1.35rem;line-height:1.4;margin-top:1.8em}h3{font-size:1.08rem}.limit{background:var(--amber);border-left:4px solid #c28c12;padding:14px 17px;margin:20px 0}.sources{padding-left:1.4em}.sources li{margin:0 0 12px}.table-wrap{overflow-x:auto}table{border-collapse:collapse;width:100%;font-size:.92rem}th,td{border:1px solid var(--line);padding:10px;text-align:left;vertical-align:top}th{background:#eff5f1}.grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}.card{background:#fff;border:1px solid var(--line);border-radius:8px;padding:18px}.card h2{margin:.1em 0 .5em}.figure{width:100%;height:auto;display:block;margin:18px auto;border:1px solid var(--line);border-radius:8px;background:#fff}.footer{border-top:1px solid var(--line);padding:25px 0 42px;margin-top:34px;color:var(--muted);font-size:.9rem}.footer nav{display:flex;gap:18px;flex-wrap:wrap}.preview-banner{padding:9px 12px;border:1px solid #e8c76c;background:#fff2cc;color:#614900;font-weight:700;border-radius:5px}.related{display:flex;gap:10px 18px;flex-wrap:wrap}@media(max-width:650px){.nav{float:none;margin-top:13px;gap:10px 16px}.wrap{padding:0 15px}.article{padding:18px 16px}.grid{grid-template-columns:1fr}table{min-width:620px}}