:root{
  --ink:#14233a; --ink-2:#3a4a63; --muted:#66748a;
  --paper:#f4f1e8; --sheet:#fffdf7; --grid:#e3dccb; --rule:#cfc6b0;
  --hivis:#f2c200; --hivis-ink:#3b2f00;
  --ok:#1f7a4d; --ok-bg:#e3f2e9; --warn:#b4231a; --warn-bg:#fbe6e3;
  --link:#1d4fa3;
  --radius:4px;
  --display:"Barlow Condensed",system-ui,sans-serif;
  --body:"IBM Plex Sans",system-ui,sans-serif;
  --mono:"IBM Plex Mono",ui-monospace,monospace;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;font-family:var(--body);color:var(--ink);background:var(--paper);
  background-image:linear-gradient(var(--grid) 1px,transparent 1px),linear-gradient(90deg,var(--grid) 1px,transparent 1px);
  background-size:24px 24px;line-height:1.5;font-size:16px}
a{color:var(--link)}
.wrap{max-width:1180px;margin:0 auto;padding:0 16px}
/* header */
.top{background:var(--ink);color:#fff;border-bottom:4px solid var(--hivis)}
.top .wrap{display:flex;align-items:center;justify-content:space-between;height:60px}
.brand{display:flex;align-items:center;gap:10px;color:#fff;text-decoration:none;font-family:var(--display);font-weight:700;font-size:22px;letter-spacing:.02em;text-transform:uppercase}
.brand svg{flex:none}
.nav{display:flex;gap:4px}
.nav a{color:#d7deea;text-decoration:none;font-size:14px;font-weight:500;padding:8px 10px;border-radius:var(--radius)}
.nav a[aria-current]{color:var(--hivis-ink);background:var(--hivis)}
.menu-btn{display:none;background:none;border:1px solid #4d5d78;color:#fff;border-radius:var(--radius);height:44px;padding:0 14px;font:600 14px var(--body)}
/* hero */
.hero{padding:28px 16px 8px}
.eyebrow{font-family:var(--mono);font-size:12px;letter-spacing:.08em;text-transform:uppercase;color:var(--ink-2)}
h1{font-family:var(--display);font-weight:700;font-size:44px;line-height:1.02;margin:6px 0 8px;text-transform:uppercase;letter-spacing:.005em}
.lede{max-width:720px;color:var(--ink-2);margin:0}
.chips{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px}
.chip{font-family:var(--mono);font-size:12px;border:1px solid var(--rule);background:var(--sheet);padding:4px 8px;border-radius:2px}
/* layout */
.tool{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,1fr);gap:20px;margin:20px auto 40px;align-items:start}
.sheet{background:var(--sheet);border:1px solid var(--rule);border-radius:var(--radius);box-shadow:0 1px 0 var(--rule),0 8px 24px -18px rgba(20,35,58,.35)}
.sheet-h{display:flex;justify-content:space-between;align-items:center;padding:12px 16px;border-bottom:1px solid var(--rule);font-family:var(--display);font-weight:600;font-size:18px;text-transform:uppercase;letter-spacing:.04em}
.sheet-h small{font-family:var(--mono);font-size:11px;color:var(--muted);text-transform:none;letter-spacing:0}
.sec{padding:14px 16px;border-bottom:1px dashed var(--rule)}
.sec:last-child{border-bottom:0}
.sec-t{font-family:var(--mono);font-size:12px;letter-spacing:.06em;text-transform:uppercase;color:var(--ink-2);margin:0 0 10px;display:flex;gap:8px;align-items:center}
.sec-t b{background:var(--ink);color:#fff;font-weight:500;padding:1px 6px;border-radius:2px}
.seg{display:grid;grid-template-columns:repeat(3,1fr);border:1px solid var(--ink);border-radius:var(--radius);overflow:hidden}
.seg button{min-height:44px;border:0;border-right:1px solid var(--ink);background:var(--sheet);font:500 14px var(--body);color:var(--ink);padding:6px 4px;line-height:1.15}
.seg button:last-child{border-right:0}
.seg button span{display:block;font-family:var(--mono);font-size:11px;color:var(--muted)}
.seg button[aria-pressed=true]{background:var(--ink);color:#fff}
.seg button[aria-pressed=true] span{color:#c9d3e3}
.help{font-size:13px;color:var(--muted);margin:8px 0 0}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:12px}
label{display:block;font-size:13px;font-weight:600;margin-bottom:4px}
.field{display:flex;align-items:center;border:1px solid #9aa4b4;background:#fff;border-radius:var(--radius);min-height:44px}
.field:focus-within{outline:3px solid var(--hivis);outline-offset:1px;border-color:var(--ink)}
.field input,.field select{flex:1;border:0;background:transparent;font:500 16px var(--mono);padding:10px 12px;min-width:0;color:var(--ink)}
.field input:focus,.field select:focus{outline:none}
.unit{font-family:var(--mono);font-size:12px;color:var(--muted);padding:0 10px;border-left:1px solid #e1e5ec;align-self:stretch;display:flex;align-items:center}
.err .field{border-color:var(--warn);background:var(--warn-bg)}
.err-msg{color:var(--warn);font-size:13px;margin-top:4px}
.rows{display:flex;flex-direction:column;gap:6px}
.row{display:grid;grid-template-columns:1fr 120px 44px;gap:6px;align-items:center}
.row .name{font-size:14px;border:1px solid #d5dae2;border-radius:var(--radius);min-height:44px;display:flex;align-items:center;padding:0 10px;background:#fff}
.row .va{font-family:var(--mono);font-size:14px;border:1px solid #d5dae2;border-radius:var(--radius);min-height:44px;display:flex;align-items:center;justify-content:flex-end;padding:0 10px;background:#fff}
.icon-btn{width:44px;height:44px;border:1px solid #d5dae2;background:#fff;border-radius:var(--radius);color:var(--muted);font-size:18px}
.row.new .name{border-left:4px solid var(--hivis)}
.presets{display:flex;flex-wrap:wrap;gap:8px;margin-top:10px}
.preset{min-height:44px;border:1.5px dashed var(--ink);background:transparent;border-radius:var(--radius);padding:0 12px;font:600 14px var(--body);color:var(--ink)}
.preset:hover{background:#fff7cc}
/* result */
.result{position:sticky;top:12px}
.plate{margin:16px;border:2px solid var(--ink);border-radius:6px;background:linear-gradient(#fff,#fbf8ef);position:relative}
.plate:before,.plate:after{content:"";position:absolute;width:8px;height:8px;border-radius:50%;background:radial-gradient(#a7aebb,#6b7486);top:8px}
.plate:before{left:8px}.plate:after{right:8px}
.plate-h{text-align:center;font-family:var(--mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;padding:10px 24px 6px;border-bottom:1px solid var(--ink);color:var(--ink-2)}
.big{display:flex;align-items:baseline;justify-content:center;gap:8px;padding:14px 12px 4px}
.big .n{font-family:var(--mono);font-weight:600;font-size:56px;letter-spacing:-.02em;line-height:1}
.big .u{font-family:var(--display);font-size:22px;font-weight:600}
.sub{text-align:center;font-family:var(--mono);font-size:13px;color:var(--ink-2)}
.meter{margin:14px 16px 6px;height:14px;border:1.5px solid var(--ink);border-radius:2px;position:relative;background:repeating-linear-gradient(90deg,#fff 0 9.8%,#d9d3c3 9.8% 10%)}
.meter i{position:absolute;inset:0 auto 0 0;width:47.5%;background:var(--ink)}
.meter-l{display:flex;justify-content:space-between;font-family:var(--mono);font-size:11px;color:var(--muted);margin:0 16px}
.verdict{margin:12px 16px 16px;display:flex;gap:10px;align-items:center;padding:10px 12px;border-radius:var(--radius);font-weight:600}
.verdict.ok{background:var(--ok-bg);color:var(--ok);border:1px solid #9fd0b4}
.verdict svg{flex:none}
.steps{width:100%;border-collapse:collapse;font-size:13px}
.steps th,.steps td{padding:7px 16px;border-top:1px solid #ece6d6;text-align:left;vertical-align:top}
.steps td.v{font-family:var(--mono);text-align:right;white-space:nowrap}
.steps .ref{font-family:var(--mono);font-size:11px;color:var(--muted);display:block}
.steps tr.tot td{font-weight:700;border-top:2px solid var(--ink)}
.actions{display:grid;grid-template-columns:1fr 1fr;gap:8px;padding:14px 16px}
.btn{min-height:48px;border-radius:var(--radius);font:600 15px var(--body);border:2px solid var(--ink);display:flex;align-items:center;justify-content:center;gap:8px;cursor:pointer;text-decoration:none}
.btn-primary{background:var(--hivis);color:var(--hivis-ink);border-color:var(--hivis-ink)}
.btn-ghost{background:#fff;color:var(--ink)}
.pro-row{display:flex;flex-wrap:wrap;gap:8px;padding:0 16px 14px}
.pro-btn{min-height:44px;border:1px solid var(--rule);background:#fff;border-radius:var(--radius);padding:0 10px;font:500 14px var(--body);color:var(--ink);display:flex;align-items:center;gap:6px;cursor:pointer}
.tag{font:600 10px var(--mono);letter-spacing:.06em;background:var(--ink);color:var(--hivis);padding:2px 5px;border-radius:2px}
.disc{font-size:12px;color:var(--muted);padding:12px 16px;border-top:1px solid var(--rule)}
.next{padding:12px 16px;border-top:1px solid var(--rule);font-size:14px}
/* content */
.content{background:var(--sheet);border-top:1px solid var(--rule);border-bottom:1px solid var(--rule)}
.content .wrap{max-width:760px;padding-top:28px;padding-bottom:28px}
h2{font-family:var(--display);font-weight:700;font-size:28px;text-transform:uppercase;margin:28px 0 10px;letter-spacing:.01em}
h2:first-child{margin-top:0}
.formula{font-family:var(--mono);background:#fff;border:1px solid var(--rule);border-left:4px solid var(--hivis);padding:12px 14px;font-size:14px;overflow-x:auto}
.related{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}
.related a{display:block;padding:14px;border:1px solid var(--rule);background:#fff;border-radius:var(--radius);text-decoration:none;color:var(--ink);font-weight:600}
.related a small{display:block;font-weight:400;color:var(--muted)}
footer{background:var(--ink);color:#c9d3e3;font-size:14px}
footer .wrap{display:grid;grid-template-columns:2fr 1fr 1fr;gap:24px;padding:28px 16px}
footer a{color:#fff;text-decoration:none;display:block;padding:4px 0}
footer .fl{font-family:var(--mono);font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:#8d9ab0;margin-bottom:6px}
/* pro panel */
.scrim{position:fixed;inset:0;background:rgba(20,35,58,.55);display:none;align-items:flex-end;justify-content:center;z-index:20;padding:0}
.scrim.open{display:flex}
.panel{background:var(--sheet);width:100%;max-width:560px;border-radius:10px 10px 0 0;border-top:6px solid var(--hivis);max-height:92vh;overflow:auto}
@media (min-width:720px){.scrim{align-items:center;padding:24px}.panel{border-radius:8px}}
.panel-h{padding:18px 20px 8px;display:flex;justify-content:space-between;gap:12px}
.panel-h p{margin:4px 0 0;color:var(--ink-2);font-size:14px}
.panel .soon{font:600 11px var(--mono);letter-spacing:.08em;text-transform:uppercase;color:var(--hivis-ink);background:var(--hivis);padding:3px 7px;border-radius:2px;display:inline-block}
.panel-title{font-family:var(--display);font-size:28px;font-weight:700;text-transform:uppercase;margin:8px 0 0;line-height:1.05}
.feat{list-style:none;margin:8px 0;padding:0 20px}
.feat li{display:flex;gap:10px;padding:8px 0;border-bottom:1px dashed var(--rule);font-size:14px}
.feat li b{display:block}
.feat .k{font:600 10px var(--mono);color:var(--muted);width:60px;flex:none;padding-top:2px}
.price{margin:12px 20px;padding:12px 14px;border:2px solid var(--ink);border-radius:var(--radius);display:flex;justify-content:space-between;align-items:center;gap:12px}
.price .n{font-family:var(--mono);font-size:26px;font-weight:600}
.price small{color:var(--ink-2);font-size:13px}
.form{padding:4px 20px 20px;display:grid;gap:12px}
.opts{display:flex;flex-wrap:wrap;gap:6px}
.opt{min-height:40px;border:1px solid #9aa4b4;border-radius:999px;padding:0 12px;background:#fff;font:500 13px var(--body);color:var(--ink)}
.opt[aria-pressed=true]{background:var(--ink);color:#fff;border-color:var(--ink)}
.fine{font-size:12px;color:var(--muted);margin:0}
.x{width:44px;height:44px;border:1px solid var(--rule);background:#fff;border-radius:var(--radius);font-size:20px;flex:none}
.proto-note{position:fixed;left:12px;bottom:12px;background:#000;color:#fff;font:12px var(--mono);padding:6px 10px;border-radius:4px;opacity:.75;z-index:30}
/* responsive */
@media (max-width:900px){
  .tool{grid-template-columns:1fr}
  .result{position:static}
  .nav{display:none}.menu-btn{display:block}
  h1{font-size:34px}
  footer .wrap{grid-template-columns:1fr}
}
@media (max-width:480px){
  .grid2{grid-template-columns:1fr}
  .row{grid-template-columns:1fr 112px 44px}.row .va{white-space:nowrap;font-size:13px;padding:0 8px}.brand{font-size:17px}
  .big .n{font-size:46px}
  .related{grid-template-columns:1fr}
  .seg button{font-size:13px}
}
@media (prefers-reduced-motion:no-preference){
  .plate{animation:rise .5s ease-out both}
  @keyframes rise{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}
}
@font-face{font-family:'Barlow Condensed';src:url('/fonts/barlow-condensed-latin-700-normal.woff2') format('woff2');font-weight:700;font-display:swap}
@font-face{font-family:'IBM Plex Sans';src:url('/fonts/ibm-plex-sans-latin-400-normal.woff2') format('woff2');font-weight:400;font-display:swap}
@font-face{font-family:'IBM Plex Sans';src:url('/fonts/ibm-plex-sans-latin-600-normal.woff2') format('woff2');font-weight:500 700;font-display:swap}
@font-face{font-family:'IBM Plex Mono';src:url('/fonts/ibm-plex-mono-latin-400-normal.woff2') format('woff2');font-weight:400 700;font-display:swap}
[hidden]{display:none!important}.skip{position:absolute;top:-60px;left:12px;z-index:40;padding:12px;background:var(--hivis)}.skip:focus{top:12px}
button,input,select,textarea{font:inherit}button{cursor:pointer}button:disabled{cursor:not-allowed;opacity:.55}button:focus-visible,a:focus-visible{outline:3px solid var(--hivis);outline-offset:3px}
.field select{width:100%;min-height:44px}.field input{width:100%}.input-wrap{min-width:0}.input-wrap label{line-height:1.4}.grid2>div{min-width:0}
.sec-t{padding:0}fieldset{margin:0;border:0;min-width:0}legend{float:left;width:100%}legend+*{clear:both}
.row-card{padding:10px;border:1px solid var(--rule);background:#fff;margin:8px 0}.row-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:8px}.row-head b{font-size:14px}
.row-card .grid2{gap:8px}.notice{border-left:4px solid var(--hivis);background:#fff7ce;padding:12px 16px;margin:8px 0;overflow-wrap:anywhere}.error-notice{border-color:var(--warn);background:var(--warn-bg)}
.result h2.sheet-h{margin:0;font-size:18px}.verdict.exceeds{color:var(--warn);background:var(--warn-bg);border:1px solid var(--warn)}.meter{overflow:hidden}.big .n{overflow-wrap:anywhere}.steps{table-layout:fixed}.steps th{width:64%;font-weight:400}.steps td.v{white-space:normal;overflow-wrap:anywhere}.steps caption{text-align:left;padding:12px 16px;font-weight:600}
footer a{min-height:44px;display:flex;align-items:center}.nav a{min-height:44px;display:flex;align-items:center}.disc{color:#4b5c72}.help,.fine{color:#4b5c72}.muted{color:var(--ink-2)}
.content p,.content li{overflow-wrap:anywhere}.formula{overflow:visible;overflow-wrap:anywhere;word-break:normal}.breadcrumb{padding-top:14px;font-size:13px}.trust{max-width:760px;padding-top:28px;padding-bottom:48px;background:var(--sheet);margin:24px auto;border:1px solid var(--rule)}.trust h1{font-size:38px}.trust h2{margin-top:24px}
.pro-dialog{border:0;padding:0;background:transparent;color:var(--ink);max-width:608px;width:calc(100% - 32px);max-height:94dvh}.pro-dialog::backdrop{background:rgba(20,35,58,.55)}.panel{max-width:100%;max-height:90dvh;border-radius:8px;border-top:6px solid var(--hivis)}.panel h2{margin:8px 0 0}.feature-options{display:grid;gap:4px}.check-label{display:flex;align-items:center;gap:10px;min-height:44px;font-weight:400}.check-label input{width:20px;height:20px;flex:none;accent-color:var(--ink)}
.mobile-menu{background:var(--ink);padding:12px 16px;display:grid;gap:4px}.mobile-menu a{color:white;padding:10px;min-height:44px}.floating-status{margin:0 16px 12px}.pro-row button{white-space:normal;text-align:left}.pro-dialog .btn{width:100%}.toolbar{display:flex;flex-wrap:wrap;gap:8px}.toolbar .btn{padding:8px 12px;min-height:44px;font-size:13px}.noscript{padding:16px;border:1px solid var(--warn);background:white}
@media(max-width:480px){.hero{padding-top:20px}.hero .lede{font-size:14px}.chips{margin-top:8px;gap:4px}.chip{font-size:10px}.tool{margin-top:12px}.sec{padding:12px}.actions{grid-template-columns:1fr}.sheet-h{padding:12px}.pro-dialog{width:100%;max-width:100%;max-height:94dvh;margin:auto 0 0;border-radius:10px 10px 0 0}.panel{border-radius:10px 10px 0 0}.related a{min-height:44px}.big .n{font-size:42px}h1{font-size:32px}.seg button{font-size:12px}}
.presets select,.presets input{min-height:44px;max-width:100%;border:1px solid #9aa4b4;border-radius:var(--radius);padding:8px;background:white;color:var(--ink)}.presets label{display:flex;align-items:center;min-height:44px;margin:0}.preset-custom-label{flex-basis:100%}button{min-height:44px}

.verdict.preliminary{color:var(--ink);border:1px solid #f2c200;background:#fff8d6}
#confirmations .sec{padding:20px;border-bottom:1px solid var(--rule)}
#confirmations .input-wrap{margin-top:12px}
#example-banner{margin:18px 20px}

/* Mobile load result: keep the page's last controls and footer clear of the fixed bar. */
.mini-result{display:none}
#result-title{scroll-margin-top:12px}
#result-title:focus-visible{outline:3px solid var(--hivis);outline-offset:-3px}
@media (width < 900px){
 body.has-mini-result{padding-bottom:var(--mini-result-height,calc(112px + env(safe-area-inset-bottom,0px)))}
 .mini-result{position:fixed;z-index:10;bottom:0;left:0;right:0;display:flex;align-items:center;gap:12px;padding:12px 16px calc(12px + env(safe-area-inset-bottom,0px));background:var(--ink);color:#fff;border-top:3px solid var(--hivis);box-shadow:0 -4px 16px rgba(20,35,58,.2)}
 .mini-summary{flex:1;min-width:0;display:grid;gap:2px}
 .mini-summary strong{font:600 24px var(--mono);color:var(--hivis)}
 .mini-summary span{font-size:13px;line-height:1.3;overflow-wrap:anywhere}
 .mini-result .btn{flex:none;min-width:44px;min-height:44px;padding:8px 12px}
}