:root{
  --bg:#f6f7f9; --panel:#ffffff; --ink:#15181d; --muted:#6a7280; --line:#e2e5ea;
  --accent:#3b5bdb; --accent-ink:#ffffff; --ok:#1f9d55;
  --mono:"JetBrains Mono","Fira Code",ui-monospace,Menlo,Consolas,monospace;
  --sans:"Inter",system-ui,-apple-system,"Segoe UI",sans-serif;
}
@media (prefers-color-scheme:dark){
  :root{--bg:#101215;--panel:#181b20;--ink:#eceff3;--muted:#8d95a3;--line:#2a2e36;--accent:#6c8cff;--accent-ink:#0b0d12}
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--sans);line-height:1.6;font-size:16px}
a{color:inherit}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:4px}
.wrap{max-width:1120px;margin:0 auto;padding:0 24px}

header.site{border-bottom:1px solid var(--line);background:var(--panel)}
header.site .wrap{display:flex;align-items:center;justify-content:space-between;height:64px}
.logo{font-weight:700;font-size:1.15rem;letter-spacing:-.02em;text-decoration:none;display:flex;align-items:center;gap:10px}
.logo svg{width:22px;height:22px}
nav.main{display:flex;gap:4px}
nav.main a{text-decoration:none;color:var(--muted);padding:8px 14px;border-radius:8px;font-size:.95rem}
nav.main a:hover{color:var(--ink);background:var(--bg)}
nav.main a[aria-current="page"]{color:var(--ink);background:var(--bg);font-weight:600}

.hero{padding:56px 0 28px}
.hero h1{font-size:clamp(2rem,4.5vw,3rem);line-height:1.1;letter-spacing:-.03em;margin:0 0 14px;font-weight:700;max-width:18ch}
.hero p{color:var(--muted);max-width:52ch;margin:0;font-size:1.05rem}

.platforms{display:flex;gap:10px;margin:28px 0 20px;flex-wrap:wrap}
.pf{font:inherit;display:flex;align-items:center;gap:10px;padding:10px 16px;border:1px solid var(--line);background:var(--panel);color:var(--ink);border-radius:10px;cursor:pointer}
.pf[aria-pressed="true"]{border-color:var(--accent);box-shadow:0 0 0 1px var(--accent)}
.pf[disabled]{cursor:not-allowed;color:var(--muted);background:transparent}
.badge{font-size:.75rem;padding:2px 8px;border-radius:999px;background:var(--bg);border:1px solid var(--line);color:var(--muted)}

.tool{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-bottom:16px}
@media (max-width:820px){.tool{grid-template-columns:1fr}}
.box{background:var(--panel);border:1px solid var(--line);border-radius:12px;display:flex;flex-direction:column;min-height:420px;overflow:hidden}
.box-head{display:flex;justify-content:space-between;align-items:center;padding:10px 14px;border-bottom:1px solid var(--line);min-height:52px}
.box-head h2{font-size:.95rem;margin:0;font-weight:600}
.box textarea{flex:1;width:100%;border:0;resize:none;padding:14px;background:transparent;color:var(--ink);font-family:var(--mono);font-size:.85rem;line-height:1.55;min-height:360px}
.box textarea:focus{outline:none}
.actions{display:flex;gap:6px}
.icon-btn{font:inherit;font-size:.85rem;display:flex;align-items:center;gap:6px;padding:7px 12px;border:1px solid var(--line);background:var(--panel);color:var(--ink);border-radius:8px;cursor:pointer}
.icon-btn:hover{background:var(--bg)}
.icon-btn svg{width:16px;height:16px}
.icon-btn.done{color:var(--ok);border-color:var(--ok)}

.bar{display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap;margin-bottom:64px}
.opts{display:flex;gap:18px;flex-wrap:wrap;color:var(--muted);font-size:.9rem}
.opts label{display:flex;align-items:center;gap:8px;cursor:pointer}
.primary{font:inherit;font-weight:600;padding:12px 26px;border:0;border-radius:10px;background:var(--accent);color:var(--accent-ink);cursor:pointer}
.primary:hover{filter:brightness(1.08)}
.status{color:var(--muted);font-size:.85rem;min-height:1.4em;margin:-8px 0 20px}
.status.err{color:#d6336c}

main.page{padding:48px 0 80px}
main.page h1{font-size:2rem;letter-spacing:-.02em;margin:0 0 8px}
main.page .lead{color:var(--muted);margin:0 0 36px;max-width:56ch}
details{background:var(--panel);border:1px solid var(--line);border-radius:10px;margin-bottom:10px}
summary{cursor:pointer;padding:16px 18px;font-weight:600;list-style:none;display:flex;justify-content:space-between;gap:16px}
summary::-webkit-details-marker{display:none}
summary::after{content:"+";color:var(--muted);font-weight:400;font-size:1.3rem;line-height:1}
details[open] summary::after{content:"–"}
details p{margin:0;padding:0 18px 18px;color:var(--muted);max-width:70ch}
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:14px}
.card{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:20px}
.card h3{margin:0 0 6px;font-size:1.02rem}
.card p{margin:0;color:var(--muted);font-size:.93rem}
.prose{max-width:66ch}
.prose h2{font-size:1.1rem;margin:32px 0 6px}
.prose p{color:var(--muted);margin:0 0 10px}
.note{border-left:3px solid var(--accent);background:var(--panel);padding:14px 16px;border-radius:0 10px 10px 0;color:var(--muted);margin:24px 0}
footer.site{border-top:1px solid var(--line);padding:24px 0;color:var(--muted);font-size:.88rem}
footer.site .wrap{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}