:root{
  --bg:#f4f4f2;
  --sf:#ffffff;
  --ink:#1a1a18;
  --mut:#5c5c56;
  --g:#1a1a18;
  --g2:#2e2e2a;
  --g3:#3d3d38;
  --on:#fafaf8;
  --soft:#ebebe7;
  --line:#d6d6d0;
  --bad:#b42318;
  --warn:#f59e0b;
  --sh:0 1px 2px rgba(20,20,18,.05),0 8px 24px rgba(20,20,18,.08),0 24px 48px rgba(20,20,18,.04);
  color-scheme:light;
  --st:env(safe-area-inset-top,0px);
  --sb:env(safe-area-inset-bottom,0px);
  --f:ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  --d:var(--f)
}
@media(prefers-color-scheme:dark){:root:not([data-theme=light]){
  --bg:#0e0e0c;
  --sf:#1a1a17;
  --ink:#f2f2ee;
  --mut:#9a9a92;
  --g:#f2f2ee;
  --g2:#d4d4cc;
  --g3:#b8b8b0;
  --on:#121210;
  --soft:#242420;
  --line:#2e2e2a;
  --bad:#ff8a7a;
  --sh:0 1px 2px rgba(0,0,0,.6),0 10px 28px rgba(0,0,0,.45),0 24px 48px rgba(0,0,0,.25);
  color-scheme:dark
}}
:root[data-theme=dark]{
  --bg:#0e0e0c;
  --sf:#1a1a17;
  --ink:#f2f2ee;
  --mut:#9a9a92;
  --g:#f2f2ee;
  --g2:#d4d4cc;
  --g3:#b8b8b0;
  --on:#121210;
  --soft:#242420;
  --line:#2e2e2a;
  --bad:#ff8a7a;
  --sh:0 1px 2px rgba(0,0,0,.6),0 10px 28px rgba(0,0,0,.45),0 24px 48px rgba(0,0,0,.25);
  color-scheme:dark
}
*{box-sizing:border-box}html{scroll-padding-top:calc(var(--st) + 72px)}
body{margin:0;background:radial-gradient(900px 420px at 0 -10%,var(--soft),transparent 60%),var(--bg);color:var(--ink);font:16px/1.55 var(--f);-webkit-font-smoothing:antialiased}
h1,h2,h3{font-family:var(--d);font-weight:800;letter-spacing:-.02em;line-height:1.15}h2{margin:22px 0 8px;font-size:1.3rem}
a{color:var(--g)}
.app{max-width:760px;margin:auto}
.skip{position:absolute;left:-999px}.skip:focus{left:12px;top:12px;background:var(--sf);padding:8px 12px;border-radius:8px;z-index:50}
.topbar{position:sticky;top:0;z-index:20;display:flex;align-items:center;gap:8px;padding:calc(10px + var(--st)) 16px 10px;background:color-mix(in srgb,var(--bg) 88%,transparent);backdrop-filter:blur(12px)}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink);margin-right:auto}
.brand img{width:38px;height:38px;border-radius:11px}
.brand b{font:800 1.05rem var(--d);display:block;line-height:1.1}.brand b i{font-style:normal;color:var(--mut)}
.brand small{color:var(--mut);font-size:.75rem}
.ib{width:40px;height:40px;padding:0;border-radius:12px;display:grid;place-items:center}
.ib svg,.bn svg{width:22px;height:22px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.main{padding:8px 16px 16px}
.ptitle{font-size:1.7rem;margin:10px 0 4px}
.hero{background:linear-gradient(145deg,#0f0f0d 0%,#1a1a18 40%,#2a2a26 75%,#3a3a35 100%);color:#fafaf8;border-radius:24px;padding:22px 20px;margin:8px 0 14px;box-shadow:var(--sh),inset 0 1px 0 rgba(255,255,255,.06)}
.hero h1{margin:0 0 4px;font-size:clamp(1.55rem,5vw,2.1rem)}.hero p{margin:0;opacity:.82;color:#c8c8c0}
.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin:18px 0 14px}
.stats div{background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.06);border-radius:14px;padding:12px}
.stats b{display:block;font:800 1.9rem/1 var(--d);color:#fff}.stats span{font-size:.8rem;opacity:.75;color:#b8b8b0}
.hero-foot{display:flex;justify-content:space-between;align-items:center;gap:10px;flex-wrap:wrap;font-size:.9rem;color:#b0b0a8}
button{font:inherit;font-weight:600;color:inherit;border:1px solid var(--line);background:var(--sf);border-radius:999px;padding:9px 16px;cursor:pointer;transition:background .15s,border-color .15s,box-shadow .15s}
button:hover{background:var(--soft)}
button.on,button.ac{background:var(--g);color:var(--on);border-color:var(--g);box-shadow:0 1px 3px rgba(0,0,0,.12)}button.on:hover,button.ac:hover{background:var(--g2);border-color:var(--g2)}
button.p{background:var(--ink);color:var(--on);border-color:var(--ink)}button.p:hover{background:var(--g2);border-color:var(--g2)}
button.s{padding:5px 12px;font-size:.85rem}
.btn-white{background:#fafaf8;color:#1a1a18;border-color:#fafaf8;box-shadow:0 1px 2px rgba(0,0,0,.1)}.btn-white:hover{background:#e8e8e4;border-color:#e8e8e4}
.btn-ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.55)}.btn-ghost:hover{background:rgba(255,255,255,.14)}
button:focus-visible,input:focus-visible,select:focus-visible,a:focus-visible{outline:3px solid var(--g);outline-offset:2px}
.row{display:flex;gap:8px;flex-wrap:wrap;align-items:center;margin:10px 0}
.card{display:flex;gap:12px;align-items:center;justify-content:space-between;flex-wrap:wrap;background:var(--sf);border:1px solid var(--line);border-radius:16px;padding:14px;margin:10px 0;box-shadow:var(--sh);transition:border-color .15s,box-shadow .15s}
.card:hover{border-color:color-mix(in srgb,var(--line) 70%,var(--ink) 30%)}
.card h1{font-size:1.6rem;margin:4px 0}
.hint{background:var(--soft);border-radius:14px;padding:12px 14px;margin:10px 0;border-left:4px solid var(--g);font-size:.92rem}
.tag{font-size:.82rem;color:var(--mut)}.bad{color:var(--bad)}
.dot{width:20px;height:20px;border-radius:50%;border:1px solid var(--line);display:inline-block;vertical-align:middle}
code{background:var(--soft);padding:2px 6px;border-radius:6px}
label{display:block;margin:10px 0;font-size:.88rem;color:var(--mut);font-weight:600}
input,select{font:inherit;color:var(--ink)}
label input:not([type=checkbox]),label select,#q{display:block;width:100%;padding:10px 12px;margin-top:4px;border:1px solid var(--line);border-radius:12px;background:var(--bg)}
#q{display:inline-block;width:auto;flex:1;min-width:150px;margin:0;border-radius:999px;background:var(--sf)}
dialog{border:1px solid var(--line);border-radius:22px;background:var(--sf);color:var(--ink);width:min(520px,94vw);max-height:88vh;padding:20px;box-shadow:var(--sh)}
dialog::backdrop{background:rgba(10,10,8,.62);backdrop-filter:blur(4px)}dialog h2{margin-top:0}
@media(max-width:600px){dialog{margin:auto auto 0;width:100%;max-width:100%;border-radius:22px 22px 0 0;padding-bottom:calc(20px + var(--sb))}}
.welcome{background:var(--sf);border:1px solid var(--line);border-radius:20px;padding:6px 20px 18px;box-shadow:var(--sh);margin:10px 0}.welcome ol{padding-left:1.2rem}.welcome li{margin:8px 0}
.more{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.more button,.more a{display:flex;flex-direction:column;gap:2px;text-align:left;border:1px solid var(--line);border-radius:14px;padding:12px;background:var(--bg);color:var(--ink);text-decoration:none;font-weight:400}
.more b{font-weight:700}.more span{font-size:.8rem;color:var(--mut)}
#nav{position:fixed;left:50%;transform:translateX(-50%);bottom:calc(10px + var(--sb));width:min(560px,calc(100% - 20px));display:flex;gap:2px;background:color-mix(in srgb,var(--sf) 92%,transparent);backdrop-filter:blur(14px);border:1px solid var(--line);border-radius:22px;padding:6px;box-shadow:var(--sh);z-index:30}
.bn{flex:1;border:0;background:none;display:flex;flex-direction:column;align-items:center;gap:2px;padding:6px 2px;border-radius:16px;color:var(--mut);font-size:.72rem;transition:background .15s,color .15s}
.bn.on,.bn:hover{background:var(--soft);color:var(--ink)}
.bn.on{font-weight:700}
.toast{position:fixed;left:50%;bottom:calc(92px + var(--sb));transform:translate(-50%,12px);background:var(--ink);color:var(--on);padding:10px 16px;border-radius:12px;opacity:0;pointer-events:none;transition:.2s;z-index:60;max-width:90vw;box-shadow:0 4px 20px rgba(0,0,0,.25)}.toast.on{opacity:1;transform:translate(-50%,0)}
#ck{position:fixed;left:10px;right:10px;bottom:calc(88px + var(--sb));max-width:560px;margin:auto;background:var(--sf);color:var(--ink);border:1px solid var(--line);box-shadow:var(--sh);border-radius:16px;padding:12px 14px;z-index:40;display:none;gap:10px;align-items:center;flex-wrap:wrap;font-size:.88rem}
footer{padding:8px 16px 130px;color:var(--mut);font-size:.84rem}footer a{margin-right:12px;cursor:pointer}footer .row{margin:6px 0}
.prose ul,.prose ol{padding-left:1.2rem}.prose li{margin:4px 0}
@media(prefers-reduced-motion:reduce){*{transition:none!important}}