:root{--bg:#f5f7f6;--ink:#14243a;--mute:#52606d;--acc:#f2b705;--teal:#0e7c7b;--card:#fff;--line:#d9e1e0}
@media(prefers-color-scheme:dark){:root{--bg:#0f1a28;--ink:#e8eef2;--mute:#9fb0bd;--card:#16273a;--line:#27394d;--teal:#4fc3c1}}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--ink);font:17px/1.7 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif}
header{border-bottom:6px solid var(--acc);background:var(--card)}
.bar{max-width:760px;margin:auto;padding:16px 20px;display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap}
.logo{font-weight:800;font-size:1.3rem;color:var(--ink);text-decoration:none;letter-spacing:-.02em}
.logo b{color:var(--teal)}
nav a{margin-left:16px;color:var(--mute);text-decoration:none;font-size:.95rem}
nav a:hover,nav a:focus-visible{color:var(--ink);text-decoration:underline}
main{max-width:760px;margin:auto;padding:36px 20px 56px}
h1{font-size:2.1rem;line-height:1.2;margin:0 0 6px;letter-spacing:-.02em}
h2{font-size:1.25rem;margin:2.2em 0 .4em;padding-left:12px;border-left:4px solid var(--acc)}
p,li{max-width:68ch}
.meta{color:var(--mute);margin:0 0 24px}
a{color:var(--teal)}
ul,ol{padding-left:1.3em}
li{margin:.3em 0}
.box{background:var(--card);border:1px solid var(--line);border-radius:8px;padding:16px 20px;margin:20px 0}
table{width:100%;border-collapse:collapse;background:var(--card);font-size:.95rem}
th,td{text-align:left;padding:10px 12px;border:1px solid var(--line);vertical-align:top}
th{background:var(--bg)}
.wrap{overflow-x:auto}
.btn{display:inline-block;background:var(--acc);color:#14243a;font-weight:700;padding:10px 18px;border-radius:6px;text-decoration:none}
footer{max-width:760px;margin:auto;padding:20px;color:var(--mute);font-size:.9rem;border-top:1px solid var(--line)}
a:focus-visible,.btn:focus-visible{outline:3px solid var(--teal);outline-offset:2px}