:root{--bg: #ffffff;--fg: #1a1a1c;--muted: #5b5f66;--line: #d3d6db;--card: #f4f6f8;--accent: #0017c1;--accent-hover: #000b8c;--accent-fg: #ffffff;--pr-bg: #f0f3ff;--pr-fg: #0017c1;--pr-line: #b9c4f2;--focus: #ffb60a;--max: 760px;--font: "Noto Sans JP", -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Sans", Meiryo, Roboto, Helvetica, Arial, sans-serif}*{box-sizing:border-box}html{font-family:var(--font);font-size:17px;line-height:1.9;color:var(--fg);background:var(--bg);-webkit-text-size-adjust:100%}body{margin:0}.container{max-width:var(--max);margin:0 auto;padding:0 20px}main.container{padding-top:8px;padding-bottom:24px}a{color:var(--accent);text-decoration:underline;text-underline-offset:3px}a:hover{color:var(--accent-hover)}:focus-visible{outline:3px solid var(--focus);outline-offset:2px}h1{font-size:1.75rem;font-weight:700;line-height:1.45;margin:.8em 0 .6em;letter-spacing:.01em}h2{font-size:1.3rem;font-weight:700;margin:2em 0 .6em;padding:.3em 0 .3em .6em;border-left:5px 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