:root{--bg:#fff;--ink:#0a0a0a;--mute:#6b6b6b;--line:rgba(0,0,0,.09);--glass:rgba(255,255,255,.62);--inp:rgba(255,255,255,.85);--bar:#e9e9e9;--bar2:#b9b9b9;--g1:rgba(120,150,255,.13);--g2:rgba(255,170,120,.13);color-scheme:light}
[data-theme=dark]{--bg:#0b0b0c;--ink:#f3f3f3;--mute:#9a9a9a;--line:rgba(255,255,255,.13);--glass:rgba(30,30,32,.6);--inp:rgba(18,18,20,.9);--bar:#2a2a2c;--bar2:#6b6b6b;--g1:rgba(90,120,255,.16);--g2:rgba(255,140,90,.10);color-scheme:dark}
*{box-sizing:border-box}
html{scroll-padding-top:70px}
body{margin:0;background:var(--bg);color:var(--ink);font-family:'Instrument Sans',system-ui,-apple-system,Segoe UI,Roboto,sans-serif;line-height:1.6;min-height:100vh;background-image:radial-gradient(520px 320px at 8% 0%,var(--g1),transparent 70%),radial-gradient(480px 300px at 95% 12%,var(--g2),transparent 70%);background-repeat:no-repeat}
a{color:var(--ink)}
.wrap{max-width:1040px;margin:0 auto;padding:0 20px}
header{position:sticky;top:0;z-index:5;background:var(--glass);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}
header .wrap{display:flex;align-items:center;gap:14px;height:60px}
.logo{font-weight:700;font-size:20px;letter-spacing:-.02em;text-decoration:none}
nav{display:flex;gap:16px;margin-left:8px}
nav a{font-size:14px;color:var(--mute);text-decoration:none}nav a:hover{color:var(--ink)}
#q{flex:1;max-width:320px;margin-left:auto;padding:9px 14px;border:1px solid var(--line);border-radius:12px;background:var(--inp);font:inherit;font-size:14px;color:var(--ink)}
#tg{border:1px solid var(--line);background:var(--inp);color:var(--ink);border-radius:10px;width:38px;height:38px;cursor:pointer;font-size:16px}
#q:focus,input:focus,select:focus,textarea:focus,button:focus-visible{outline:2px solid var(--ink);outline-offset:1px}
@media(max-width:700px){nav{display:none}}
h1{font-size:clamp(28px,5vw,44px);letter-spacing:-.03em;line-height:1.12;margin:44px 0 10px;font-weight:700}
.sub{color:var(--mute);margin:0 0 30px;max-width:560px}
h2{font-size:18px;margin:34px 0 12px;font-weight:600}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:12px}
.card{display:block;padding:14px 16px;border:1px solid var(--line);border-radius:14px;background:var(--glass);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);text-decoration:none;transition:border-color .15s,transform .15s}
.card:hover{border-color:var(--ink);transform:translateY(-1px)}
.card b{display:block;font-weight:600;font-size:15px}.card span{font-size:13px;color:var(--mute)}
.crumb{font-size:13px;color:var(--mute);margin-top:22px}.crumb a{color:var(--mute);text-decoration:none}
.panel{margin-top:26px;padding:24px;border:1px solid var(--line);border-radius:18px;background:var(--glass);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);box-shadow:0 8px 30px rgba(0,0,0,.05)}
.two{display:grid;grid-template-columns:1fr 1fr;gap:28px}
@media(max-width:760px){.two{grid-template-columns:1fr}}
label{display:block;font-size:13px;font-weight:500;margin:14px 0 6px}label:first-child{margin-top:0}
input,select,textarea{width:100%;padding:10px 12px;border:1px solid var(--line);border-radius:10px;background:var(--inp);font:inherit;font-size:15px;color:var(--ink)}
input[type=range]{padding:0;accent-color:var(--ink);margin-top:8px;background:none;border:0}
.res{border-left:1px solid var(--line);padding-left:28px}
@media(max-width:760px){.res{border-left:0;padding-left:0;border-top:1px solid var(--line);padding-top:20px}}
.big{font-size:clamp(30px,5vw,40px);font-weight:700;letter-spacing:-.03em;margin:2px 0 14px;word-break:break-word}
.row{display:flex;justify-content:space-between;gap:16px;padding:8px 0;border-bottom:1px solid var(--line);font-size:14px}.row span:first-child{color:var(--mute)}.row b{text-align:right}
.bar{height:8px;border-radius:99px;background:var(--bar);overflow:hidden;margin:6px 0 16px;display:flex}.bar i{display:block;background:var(--ink)}.bar i+i{background:var(--bar2)}
.err{color:#d33a2f;font-size:14px}.note{font-size:12px;color:var(--mute);margin-top:14px}
.actions{margin-top:18px}.btn{padding:10px 18px;border:1px solid var(--ink);background:var(--ink);color:var(--bg);border-radius:10px;font:inherit;font-size:14px;font-weight:500;cursor:pointer}
.btn.ghost{background:transparent;color:var(--ink)}
.prose{max-width:720px;font-size:15.5px}.prose h2{margin-top:30px}.prose p,.prose li{color:var(--ink);opacity:.88}
.faq details{border-bottom:1px solid var(--line);padding:12px 0}.faq summary{cursor:pointer;font-weight:600;font-size:15px}.faq p{margin:8px 0 0;opacity:.85}
.slot{margin:26px 0;min-height:0}
.form{max-width:520px}.form textarea{min-height:130px;resize:vertical}.msg{margin-top:12px;font-size:14px}
footer{margin-top:64px;padding:26px 0 44px;border-top:1px solid var(--line);font-size:13px;color:var(--mute)}footer a{color:var(--mute);margin-right:16px;text-decoration:none}footer a:hover{color:var(--ink)}
@media print{header,footer,.slot,.actions,.related,.faq,.crumb{display:none!important}body{background:#fff;color:#000}.panel{box-shadow:none;backdrop-filter:none;background:#fff;border-color:#999}[data-theme=dark]{--ink:#000;--mute:#444;--line:#999;--bar:#ddd;--bar2:#999}}

.amt{font-size:17px;font-weight:600}.hint{font-size:12px;color:var(--mute);margin-top:4px;min-height:16px}
html{scroll-behavior:smooth}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important;animation:none!important}}
:root{--spot:rgba(110,140,255,.14)}[data-theme=dark]{--spot:rgba(255,255,255,.07)}
header{transition:box-shadow .3s}header.sc{box-shadow:0 6px 24px rgba(0,0,0,.07)}
.card{position:relative;overflow:hidden}
.card::before{content:'';position:absolute;inset:0;background:radial-gradient(200px circle at var(--mx,50%) var(--my,50%),var(--spot),transparent 70%);opacity:0;transition:opacity .3s;pointer-events:none}
.card:hover::before{opacity:1}
.rv{opacity:0;transform:translateY(18px);transition:opacity .65s cubic-bezier(.2,.7,.2,1),transform .65s cubic-bezier(.2,.7,.2,1),border-color .15s}
.rv.in{opacity:1;transform:none}
.cur,.dot{position:fixed;left:0;top:0;pointer-events:none;z-index:9999;opacity:0}
.cur{width:36px;height:36px;margin:-18px 0 0 -18px;border:1.5px solid var(--ink);border-radius:50%;transition:width .25s,height .25s,margin .25s,background .25s,opacity .25s}
.cur.big{width:56px;height:56px;margin:-28px 0 0 -28px;background:var(--spot)}
.dot{width:6px;height:6px;margin:-3px 0 0 -3px;border-radius:50%;background:var(--ink)}
.layout{display:grid;grid-template-columns:210px 1fr;gap:34px;align-items:start;margin-top:8px}
.side{position:sticky;top:84px;display:flex;flex-direction:column;gap:4px;padding-top:44px}
.catb{display:flex;justify-content:space-between;align-items:center;width:100%;padding:9px 12px;border:1px solid transparent;background:none;border-radius:11px;color:var(--mute);font:inherit;font-size:14px;cursor:pointer;text-align:left;transition:background .2s,color .2s}
.catb small{font-size:12px;opacity:.7}.catb:hover{color:var(--ink)}
.catb.on{background:var(--glass);border-color:var(--line);color:var(--ink);font-weight:600}
.layout .grid{grid-template-columns:repeat(auto-fill,minmax(230px,1fr))}
.layout h1{margin-top:44px}
@media(max-width:860px){.layout{grid-template-columns:1fr;gap:0}.side{position:static;flex-direction:row;overflow-x:auto;padding:16px 0 6px;gap:6px;scrollbar-width:none}.catb{width:auto;white-space:nowrap;gap:8px;border-color:var(--line)}}
.sci{max-width:520px;margin:0 auto}
.sd{font-size:20px;padding:14px;text-align:right}
.sres{font-size:clamp(30px,6vw,42px);font-weight:700;text-align:right;min-height:56px;padding:6px 4px;word-break:break-all;letter-spacing:-.02em}
.sres.bad{font-size:14px;font-weight:500;color:#d33a2f;letter-spacing:0}
.skeys{display:grid;grid-template-columns:repeat(6,1fr);gap:8px;margin-top:8px}
.sk{padding:13px 0;border:1px solid var(--line);background:var(--inp);color:var(--ink);border-radius:12px;font:inherit;font-size:15px;cursor:pointer;transition:transform .1s,background .2s}
.sk:hover{background:var(--glass)}.sk:active{transform:scale(.94)}
.sk.num{font-weight:600}.sk.eq{background:var(--ink);color:var(--bg);border-color:var(--ink)}
.shist{margin-top:14px;font-size:13px;color:var(--mute);display:grid;gap:4px;text-align:right}
@media print{.cur,.dot,.side{display:none!important}.rv{opacity:1!important;transform:none!important}}