.wc-head{padding:8px 0 14px}
.wc-head h1{font-size:clamp(22px,3.4vw,28px);letter-spacing:-.02em;line-height:1.35}
.wc-head p{color:var(--sub);margin-top:6px;max-width:780px}
.wc-head .row{display:flex;gap:8px;flex-wrap:wrap;margin-top:10px}
.wc{display:grid;grid-template-columns:340px minmax(0,1fr);gap:18px;align-items:start}
.panel{background:#fff;border:1px solid var(--line);border-radius:12px}
.inp{position:sticky;top:76px;padding:16px 18px 18px}
.inp h2,.res h2{font-size:16px;margin-bottom:10px}
.fld{display:grid;grid-template-columns:1fr 112px;align-items:center;gap:8px;padding:6px 0;border-bottom:1px dashed #eef0f3}
.fld label{font-size:14px;color:var(--ink);line-height:1.35}
.fld label i{font-family:"Times New Roman",serif;color:var(--navy);font-style:italic;margin-left:4px}
.fld label i sub{font-size:.75em}
.fld .ib{display:flex;align-items:center;border:1px solid var(--line);border-radius:8px;background:#fff;overflow:hidden}
.fld .ib:focus-within{border-color:var(--navy);box-shadow:0 0 0 2px var(--navy-50)}
.fld input{width:100%;border:0;padding:8px 6px 8px 10px;font:inherit;font-size:16px;text-align:right;background:transparent;min-width:0}
.fld input:focus{outline:none}
.fld input.bad{background:#fbe9e9}
.fld .u{font-size:12px;color:var(--mute);padding-right:8px;white-space:nowrap}
.ibtns{display:flex;gap:8px;margin-top:14px;flex-wrap:wrap}
.ibtns button,.ibtns a{flex:1;height:40px;border-radius:8px;font:inherit;font-size:14px;font-weight:700;cursor:pointer;display:inline-flex;align-items:center;justify-content:center;white-space:nowrap;padding:0 10px}
.b2{border:1px solid var(--line);background:#fff;color:var(--ink)}
.b2:hover{border-color:var(--navy);color:var(--navy)}
.b1{border:0;background:var(--navy);color:#fff}
.verdict{display:flex;align-items:center;gap:16px;padding:18px 20px;border-radius:12px;margin-bottom:14px;flex-wrap:wrap}
.verdict.ok{background:var(--ok-bg);border:1px solid #bfe3d4}
.verdict.ng{background:var(--adv-bg);border:1px solid #f0c4c4}
.verdict.err{background:var(--wip-bg);border:1px solid #f0dca0}
.verdict .big{font-size:26px;font-weight:800;letter-spacing:-.02em}
.verdict.ok .big{color:var(--ok)}.verdict.ng .big{color:var(--adv)}.verdict.err .big{color:var(--wip)}
.verdict .kv{display:flex;gap:18px;flex-wrap:wrap;font-size:14px;color:var(--sub)}
.verdict .kv b{display:block;font-size:18px;color:var(--ink)}
.verdict .msg{flex-basis:100%;font-size:14.5px}
.sec-fig{display:flex;gap:16px;align-items:center;padding:14px 18px;margin-bottom:14px;flex-wrap:wrap}
.sec-fig svg{width:210px;height:auto;flex:none}
.sec-fig .cap{font-size:14px;color:var(--sub);flex:1;min-width:200px}
.sec-fig .cap b{color:var(--ink)}
.res{padding:6px 0}
.step{padding:14px 20px;border-top:1px solid var(--line)}
.step:first-child{border-top:0}
.step h3{font-size:15.5px;margin-bottom:8px;color:var(--navy)}
.step .ref{font-size:12.5px;color:var(--mute);font-weight:400;margin-left:6px}
.eq{display:grid;grid-template-columns:minmax(150px,auto) 1fr;gap:4px 14px;padding:5px 0;font-size:14.5px;align-items:baseline}
.eq .n{color:var(--sub)}
.eq .f{font-family:"Cambria Math","Times New Roman",serif;font-size:15.5px;overflow-x:auto;white-space:nowrap}
.eq .f var{font-style:italic;color:#0b55a3}
.eq .f .v{color:#000;font-weight:600}
.eq .f .un{color:#0f6e56;font-size:.9em;margin-left:2px}
.note{font-size:13.5px;color:var(--mute);margin:4px 0}
.chk{margin-top:6px;font-weight:700;font-size:14.5px}
.chk.ok{color:var(--ok)}.chk.ng{color:var(--adv)}.chk.wip{color:var(--wip)}
.disc{margin-top:14px;font-size:13px;color:var(--mute);line-height:1.6;padding:12px 16px;background:#fff;border:1px solid var(--line);border-radius:10px}
.vtag{display:inline-flex;gap:6px;align-items:center;font-size:12.5px;font-weight:700;color:var(--ok);background:var(--ok-bg);padding:3px 10px;border-radius:999px}
@media(max-width:900px){
  .wc{grid-template-columns:1fr}
  .inp{position:static}
  .eq{grid-template-columns:1fr;gap:0}
  .eq .n{font-size:13px}
  .eq .f{white-space:normal;overflow-wrap:anywhere}
  .sec-fig svg{width:170px}
}
@media print{
  .gnav,footer.site,.ibtns,.crumb,.disc .np,#toast{display:none!important}
  body{background:#fff}
  .wc{grid-template-columns:1fr}
  .panel{border:0}
  .inp{position:static}
}
#toast{position:fixed;left:50%;bottom:24px;transform:translateX(-50%);background:#1b2530;color:#fff;padding:10px 16px;border-radius:8px;font-size:14px;opacity:0;transition:opacity .2s;pointer-events:none;z-index:50}
#toast.show{opacity:1}
.plot{padding:14px 18px;margin-bottom:14px}
.plot h3{font-size:15px;margin-bottom:6px}
.plot svg{width:100%;height:auto;display:block}
.plot .lg{display:flex;gap:14px;flex-wrap:wrap;font-size:13px;color:var(--sub);margin-top:6px}
.plot .lg i{display:inline-block;width:18px;height:3px;vertical-align:middle;margin-right:5px;border-radius:2px}
.fld select{width:100%;border:0;padding:8px 6px 8px 10px;font:inherit;font-size:16px;background:transparent;text-align:right}
.fixed{font-size:13px;color:var(--sub);margin-top:10px;padding-top:10px;border-top:1px solid var(--line);line-height:1.7}
.fixed b{color:var(--ink);font-weight:600}