:root{--bg:#f5f8fb; --ink:#14202c; --muted:#6e767f; --line:#e1e5e8; --accent:#2f7fc0; color-scheme:light}
*{box-sizing:border-box}
body{margin:0; background:var(--bg); color:var(--ink); font:400 17px/1.6 'Geist', ui-sans-serif, system-ui, sans-serif; -webkit-font-smoothing:antialiased}
.wrap{max-width:720px; margin:0 auto; padding:24px 16px 64px}
.top{display:flex; justify-content:space-between; align-items:center; gap:16px; min-height:54px; margin-bottom:48px; border-bottom:1px solid var(--line); padding-bottom:16px}
.brand{display:inline-flex; align-items:center; gap:10px; font-weight:500; color:var(--ink); text-decoration:none}
.brand img{border-radius:50%; background:#fff}
.brand span{color:var(--muted)}
a{color:var(--ink); text-underline-offset:.2em}
a:hover{color:var(--accent)}
a:focus-visible{outline:2px solid var(--accent); outline-offset:3px; border-radius:3px}
h1{margin:0 0 28px; font-size:clamp(2rem, 1.5rem + 2.4vw, 3rem); font-weight:600; letter-spacing:-.035em; line-height:1.05}
h2{margin:36px 0 8px; font-size:1.15rem; font-weight:600; letter-spacing:-.01em}
p,ul{margin:0 0 12px}
ul{padding-left:20px}
mark{background:#fff3c4; color:inherit; padding:0 3px; border-radius:3px}
.todo{padding:12px 16px; border:1px solid #e0c46a; border-radius:10px; background:#fff9e3; font-size:.94rem}
.stand{margin-top:32px; color:var(--muted); font-size:.9rem}
.foot{display:flex; gap:20px; margin-top:56px; padding-top:20px; border-top:1px solid var(--line); font-size:.92rem}