:root{--bg:#fff;--fg:#1c2430;--mut:#5a6675;--acc:#0f5c8c;--acc2:#e8f1f7;--line:#d9e0e7}
@media (prefers-color-scheme:dark){:root{--bg:#10151b;--fg:#e6ebf0;--mut:#9aa7b5;--acc:#6bb6e6;--acc2:#18222c;--line:#26323e}}
*{box-sizing:border-box}
body{margin:0;font:16px/1.6 system-ui,-apple-system,"Segoe UI",sans-serif;background:var(--bg);color:var(--fg)}
a{color:var(--acc)}
.w{max-width:60rem;margin:0 auto;padding:0 1rem}
header{border-bottom:1px solid var(--line)}
header .w{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:.5rem 1.5rem;padding-top:.8rem;padding-bottom:.8rem}
.logo{font-weight:700;text-decoration:none;color:var(--fg)}
nav a{margin-right:1rem;text-decoration:none}
nav a[aria-current]{font-weight:700;border-bottom:2px solid var(--acc)}
h1{font-size:2rem;line-height:1.2;margin:2.5rem 0 1rem}
h2{font-size:1.35rem;margin:2rem 0 .5rem}
.lead{font-size:1.15rem;color:var(--mut)}
.grid{display:grid;gap:1rem;grid-template-columns:repeat(auto-fit,minmax(15rem,1fr));margin:1.5rem 0}
.card{background:var(--acc2);border:1px solid var(--line);border-radius:6px;padding:1rem}
.card h3{margin:0 0 .4rem;font-size:1.05rem}
.btn{display:inline-block;background:var(--acc);color:var(--bg);padding:.6rem 1.1rem;border-radius:4px;text-decoration:none;font-weight:600}
.btn.off{background:var(--line);color:var(--mut);cursor:not-allowed}
table{border-collapse:collapse;width:100%;margin:1rem 0}
th,td{border:1px solid var(--line);padding:.5rem .7rem;text-align:left;vertical-align:top}
.sc{overflow-x:auto}
footer{border-top:1px solid var(--line);margin-top:3rem;padding:1.2rem 0;color:var(--mut);font-size:.9rem}
footer a{margin-right:1rem}
@media (max-width:30rem){h1{font-size:1.6rem}}