:root{color-scheme:light;--bg: #f3efe6;--ink: #1c1915;--muted: #5c564c;--accent: #0f5c4c;--line: #d7d0c3;font-family:IBM Plex Sans,Hiragino Sans,Noto Sans JP,sans-serif}*{box-sizing:border-box}body{margin:0;min-height:100vh;color:var(--ink);background:radial-gradient(circle at top left,#dff5ec 0%,transparent 40%),linear-gradient(160deg,var(--bg),#ebe4d7)}main{max-width:40rem;margin:0 auto;padding:4rem 1.5rem}.eyebrow{margin:0 0 .75rem;color:var(--accent);font-size:.85rem;font-weight:600;letter-spacing:.08em;text-transform:uppercase}h1{margin:0 0 1rem;font-size:clamp(1.8rem,4vw,2.6rem);line-height:1.15}.lead{margin:0 0 2rem;color:var(--muted);line-height:1.7}code{font-family:IBM Plex Mono,ui-monospace,monospace;font-size:.92em}dl{display:grid;gap:1rem;margin:0;padding:1.25rem;border:1px solid var(--line);background:#ffffff8c}dl div{display:grid;gap:.25rem}dt{color:var(--muted);font-size:.8rem;letter-spacing:.04em;text-transform:uppercase}dd{margin:0;font-family:IBM Plex Mono,ui-monospace,monospace;font-size:.95rem;word-break:break-all}