:root{--bg:#f6f7fb;--surface:#fff;--fg:#1b2033;--mu:#586079;--bd:#e2e5f0;--brand:#4338ca;--brand-2:#0284c7;--brand-fg:#fff;--soft:#eef0ff;--hero-a:#eef0ff;--hero-b:#e0f2fe;--shadow:0 1px 2px rgba(20,24,50,.06),0 6px 20px rgba(20,24,50,.06);--r:16px}
@media(prefers-color-scheme:dark){:root{--bg:#0f1220;--surface:#171b2e;--fg:#eceffa;--mu:#a2a9c4;--bd:#2a3050;--brand:#8b93ff;--brand-2:#38bdf8;--brand-fg:#0f1220;--soft:#212650;--hero-a:#1a1f45;--hero-b:#0d2a40;--shadow:0 1px 2px rgba(0,0,0,.4),0 8px 24px rgba(0,0,0,.35)}}
*{box-sizing:border-box}html{scroll-behavior:smooth}
body{margin:0;font:17px/1.65 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;background:var(--bg);color:var(--fg);-webkit-font-smoothing:antialiased}
a{color:var(--brand);text-underline-offset:3px}a:hover{text-decoration-thickness:2px}
.wrap{max-width:1080px;margin:0 auto;padding:0 20px}
.top{position:sticky;top:0;z-index:20;background:color-mix(in srgb,var(--bg) 88%,transparent);backdrop-filter:saturate(1.4) blur(10px);border-bottom:1px solid var(--bd)}
.top .wrap{display:flex;align-items:center;justify-content:space-between;gap:16px;height:64px}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:20px;letter-spacing:-.02em;color:var(--fg);text-decoration:none}
.logo svg{width:34px;height:34px;flex:none}.logo span span{color:var(--brand)}
.nav{display:flex;gap:6px}.nav a{color:var(--fg);text-decoration:none;font-weight:600;font-size:15px;padding:8px 12px;border-radius:10px}.nav a:hover{background:var(--soft)}
main.wrap{padding-top:28px;padding-bottom:56px}
h1{font-size:clamp(28px,4.2vw,42px);line-height:1.15;letter-spacing:-.025em;margin:0 0 12px}
h2{font-size:clamp(21px,2.6vw,26px);letter-spacing:-.015em;margin:32px 0 12px}h3{margin:20px 0 8px}
.lead{font-size:19px;color:var(--mu);margin:0 0 20px;max-width:62ch}.mu{color:var(--mu);font-size:14.5px}
.hero{background:linear-gradient(135deg,var(--hero-a),var(--hero-b));border:1px solid var(--bd);border-radius:24px;padding:clamp(24px,5vw,52px);margin-bottom:8px}
.hero h1{max-width:20ch}
.search input{width:100%;max-width:560px;padding:15px 18px 15px 48px;font-size:17px;border:1px solid var(--bd);border-radius:14px;background:var(--surface) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='20' height='20' viewBox='0 0 24 24' fill='none' stroke='%23808aa8' stroke-width='2.4' stroke-linecap='round'%3E%3Ccircle cx='11' cy='11' r='7'/%3E%3Cpath d='M20 20l-3.5-3.5'/%3E%3C/svg%3E") no-repeat 16px center;color:var(--fg);box-shadow:var(--shadow)}
.badges{list-style:none;display:flex;flex-wrap:wrap;gap:8px 18px;padding:0;margin:18px 0 0;font-size:15px;color:var(--mu);font-weight:600}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:14px}
.tcard{display:flex;flex-direction:column;gap:4px;background:var(--surface);border:1px solid var(--bd);border-radius:var(--r);padding:18px;text-decoration:none;color:var(--fg);box-shadow:var(--shadow);transition:transform .15s,border-color .15s}
.tcard:hover{transform:translateY(-3px);border-color:var(--brand)}
.tcard .ico{display:grid;place-items:center;width:44px;height:44px;border-radius:12px;background:var(--soft);font-size:22px;margin-bottom:6px}
.tcard .tt{font-weight:700;font-size:17px;line-height:1.3}.tcard .td{color:var(--mu);font-size:14.5px;line-height:1.5}
.crumbs{font-size:14px;color:var(--mu);margin-bottom:10px}.crumbs a{color:var(--mu)}
.card{background:var(--surface);border:1px solid var(--bd);border-radius:var(--r);padding:clamp(18px,3vw,28px);box-shadow:var(--shadow)}
.tool{display:grid;grid-template-columns:1.1fr .9fr;gap:18px;align-items:start;margin:18px 0 28px}
.tool .result{position:sticky;top:84px;background:linear-gradient(160deg,var(--soft),var(--surface))}
.tool .result h2{margin:0 0 8px;font-size:15px;text-transform:uppercase;letter-spacing:.08em;color:var(--mu)}
label{display:block;margin:14px 0 6px;font-weight:650;font-size:15.5px}label:first-child{margin-top:0}
input,select,textarea{width:100%;padding:13px 14px;font:inherit;border:1.5px solid var(--bd);border-radius:12px;background:var(--bg);color:var(--fg)}
input:focus,select:focus,textarea:focus,button:focus-visible,a:focus-visible{outline:3px solid color-mix(in srgb,var(--brand) 45%,transparent);outline-offset:2px;border-color:var(--brand)}
.res .row{display:flex;justify-content:space-between;align-items:baseline;gap:14px;padding:11px 0;border-bottom:1px solid var(--bd)}
.res .row span{color:var(--mu);font-size:15px}.res .row strong{font-size:19px;font-variant-numeric:tabular-nums;text-align:right}
.res .row small{display:block;color:var(--mu);font-weight:400;font-size:13px}
.res .row.big{padding-top:4px}.res .row.big strong{font-size:clamp(28px,4vw,38px);color:var(--brand);letter-spacing:-.02em}
.res .row:last-child{border-bottom:0}.res .note{margin:8px 0;color:var(--mu)}.res .sentence{font-size:20px;line-height:1.5;margin:6px 0}.res .sentence b{color:var(--brand)}
button{font:inherit;font-weight:650;cursor:pointer;border:0;border-radius:12px;padding:12px 18px;background:var(--brand);color:var(--brand-fg)}
button.ghost{margin-top:14px;background:transparent;color:var(--brand);border:1.5px solid var(--bd);width:100%}button.ghost:hover{border-color:var(--brand)}
.prose{max-width:76ch}.prose p,.prose li{color:var(--fg)}.prose ul,.prose ol{padding-left:22px}ul.l{padding-left:22px}
.related{margin-top:36px}.related h2{margin-top:0}
.foot{border-top:1px solid var(--bd);background:var(--surface);color:var(--mu);font-size:14.5px}
.foot .wrap{display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px 28px;padding-top:26px;padding-bottom:30px}.foot a{color:var(--mu)}
.foot nav{display:flex;gap:18px;flex-wrap:wrap}.foot p{margin:0;max-width:60ch}
.none{display:none;color:var(--mu);padding:16px 0}
@media(max-width:820px){.tool{grid-template-columns:1fr}.tool .result{position:static}.nav a{padding:8px}}
@media(max-width:640px){body{font-size:16px;line-height:1.55}.wrap{padding:0 14px}.top .wrap{height:52px}.logo{font-size:17px;gap:8px}.logo svg{width:28px;height:28px}.nav a:last-child{display:none}.nav a{font-size:14px;padding:6px 8px}
main.wrap{padding-top:14px;padding-bottom:28px}
h1{font-size:23px;line-height:1.2;margin:0 0 6px}h2{font-size:18px;margin:20px 0 8px}h3{margin:14px 0 6px}.lead{font-size:15px;line-height:1.5;margin:0 0 12px}
.hero{border-radius:18px;padding:16px;margin-bottom:2px}.hero h1{font-size:23px;max-width:none}.hero .lead{font-size:14.5px;margin-bottom:12px}.search input{padding:11px 14px 11px 40px;font-size:15.5px;border-radius:12px;background-position:13px center}.badges{gap:4px 12px;font-size:12.5px;margin-top:10px}
.grid{grid-template-columns:1fr;gap:8px}
.tcard{flex-direction:row;flex-wrap:wrap;align-items:center;column-gap:12px;row-gap:0;padding:10px 12px;border-radius:14px;box-shadow:none}.tcard:hover{transform:none}
.tcard .ico{width:38px;height:38px;border-radius:10px;font-size:19px;margin:0;flex:none}
.tcard .tt{flex:1 1 0;min-width:0;font-size:15.5px;line-height:1.25}
.tcard .td{display:none}
.crumbs{font-size:12.5px;margin-bottom:6px}
.card{padding:14px;border-radius:14px;box-shadow:none}
.tool{gap:10px;margin:10px 0 18px}.tool .result{padding:14px}.tool .result h2{font-size:12px;margin:0 0 4px}
label{margin:10px 0 4px;font-size:14px}input,select,textarea{padding:10px 12px;font-size:16px;border-radius:10px}
.res .row{padding:8px 0;gap:10px}.res .row span{font-size:14px}.res .row strong{font-size:16px}.res .row.big strong{font-size:26px}.res .sentence{font-size:17px}.res .note{font-size:14px}
button.ghost{margin-top:10px;padding:9px 14px;font-size:14px}
.prose p,.prose li{font-size:15.5px}.prose h2{font-size:17px;margin:16px 0 6px}.prose ul,.prose ol{padding-left:18px}
.related{margin-top:22px}.related h2{margin-bottom:8px}.related .tcard{padding:8px 10px}
.foot .wrap{padding-top:16px;padding-bottom:18px;gap:8px 18px}.foot{font-size:13px}.foot nav{gap:14px}}
.mini{display:none}
@media(max-width:820px){.mini.on{display:flex;position:fixed;left:0;right:0;bottom:0;z-index:30;justify-content:space-between;align-items:baseline;gap:10px;padding:9px 16px calc(9px + env(safe-area-inset-bottom));background:var(--surface);border-top:1px solid var(--bd);box-shadow:0 -6px 20px rgba(20,24,50,.10)}.mini:empty{display:none!important}.mini span{color:var(--mu);font-size:13px}.mini strong{font-size:19px;color:var(--brand);font-variant-numeric:tabular-nums}}
@media(prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}