:root{--bg:#f8fafc;--fg:#0f172a;--muted:#475569;--card:#fff;--line:#e2e8f0;--accent:#2563eb;--code:#eef2ff}
@media (prefers-color-scheme:dark){:root{--bg:#0f1117;--fg:#e2e8f0;--muted:#94a3b8;--card:#161b26;--line:#252c3b;--accent:#60a5fa;--code:#1e2433}}
*{margin:0;padding:0;box-sizing:border-box}
body{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,sans-serif;background:var(--bg);color:var(--fg);line-height:1.65}
a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}
code,.bits{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}
code{background:var(--code);padding:.1rem .35rem;border-radius:4px;font-size:.9em}
nav{max-width:960px;margin:0 auto;padding:1.25rem 1.5rem;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:.5rem}
.logo{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-weight:700;color:var(--fg)}
nav .links a{margin-left:1.25rem;color:var(--muted);font-size:.95rem}
main{max-width:960px;margin:0 auto;padding:0 1.5rem 3rem}
.hero{padding:3rem 0 2rem}
.hero h1{font-size:2.6rem;line-height:1.15;letter-spacing:-.02em;margin-bottom:1rem}
.lead{font-size:1.15rem;color:var(--muted);max-width:640px}
.bits{color:var(--accent);letter-spacing:.12em;margin-top:1.5rem;font-size:.95rem;overflow-wrap:anywhere}
h2{font-size:1.6rem;margin:2.5rem 0 1rem}
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:1rem}
.card{background:var(--card);border:1px solid var(--line);border-radius:10px;padding:1.25rem}
.card h3{font-size:1.05rem;margin-bottom:.4rem}
.card p,.tab p{color:var(--muted)}
.tabs input{position:absolute;opacity:0;pointer-events:none}
.labels label{display:inline-block;padding:.55rem 1.1rem;border:1px solid var(--line);border-bottom:0;border-radius:8px 8px 0 0;margin-right:.25rem;cursor:pointer;color:var(--muted)}
.tab{display:none;background:var(--card);border:1px solid var(--line);border-radius:0 10px 10px 10px;padding:1.5rem}
.tab p+p{margin-top:.75rem}
#t-text:checked~#p-text,#t-img:checked~#p-img,#t-sound:checked~#p-sound{display:block}
#t-text:checked~.labels [for=t-text],#t-img:checked~.labels [for=t-img],#t-sound:checked~.labels [for=t-sound]{background:var(--card);color:var(--fg);font-weight:600}
.tabs input:focus-visible~.labels label{outline-offset:2px}
article h1{font-size:2.2rem;line-height:1.2;margin:2rem 0 1rem}
article p{margin:.75rem 0}
table{width:100%;border-collapse:collapse;margin:1rem 0;background:var(--card)}
th,td{border:1px solid var(--line);padding:.55rem .75rem;text-align:left}
th{color:var(--muted);font-weight:600}
td code{background:none;padding:0}
.back{display:inline-block;margin-top:2rem}
footer{border-top:1px solid var(--line);text-align:center;padding:1.5rem;color:var(--muted);font-size:.9rem}
@media(max-width:720px){.cards{grid-template-columns:1fr}.hero h1{font-size:2rem}nav .links a{margin:0 1rem 0 0}}