/* lathecore.info - старый веб-справочник. serif body, нумерованное дерево, плотные таблицы, бумага. light only. */
:root{
  --paper:#f6f6f3; --field:#fcfcfa; --ink:#22251f; --mut:#5e6358; --faint:#8a8f80;
  --acc:#0f6b5f; --acc-d:#0a5047; --line:#cfccc0; --line2:#e4e2d8; --rule:#b9b6a8;
  --head:#2a2d24; --warn-bg:#fbf4e4; --warn-l:#c89a3a; --iso-bg:#e7ece6;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--paper);color:var(--ink);
  font-family:Georgia,"Times New Roman",ui-serif,serif;font-size:16px;line-height:1.56}
a{color:var(--acc);text-decoration:none}
a:hover{text-decoration:underline}
.n,.tbl td.n,code,pre{font-family:ui-monospace,"DejaVu Sans Mono",Consolas,monospace;font-variant-numeric:tabular-nums}
h1{font-family:"Arial Narrow","Helvetica Neue",system-ui,sans-serif;font-weight:700;font-size:1.85rem;
  letter-spacing:.01em;color:var(--head);margin:.1rem 0 .7rem;line-height:1.14}
h2{font-family:"Arial Narrow",system-ui,sans-serif;font-weight:700;font-size:1.22rem;color:var(--head);
  margin:1.8rem 0 .5rem;padding-bottom:.2rem;border-bottom:2px solid var(--rule)}
h3{font-family:"Arial Narrow",system-ui,sans-serif;font-size:1.06rem;color:var(--head);margin:1.3rem 0 .35rem}
p{margin:.55rem 0}
.lede{font-size:1.05rem;color:#34382d}
.muted{color:var(--mut);font-size:.92rem}

/* masthead */
.ref-top{background:#fff;border-bottom:3px double var(--rule)}
.mast{max-width:1180px;margin:0 auto;display:flex;align-items:center;gap:.8rem;padding:.6rem 1rem}
.logo{display:flex;align-items:center;gap:.7rem;color:var(--ink)}
.logo:hover{text-decoration:none}
.logo-t{display:flex;flex-direction:column;line-height:1.1}
.logo-t b{font-family:"Arial Narrow",system-ui,sans-serif;font-size:1.3rem;letter-spacing:.03em;color:var(--acc-d)}
.logo-t i{font-style:italic;font-size:.82rem;color:var(--mut)}
.mast-r{margin-left:auto;display:flex;align-items:center;gap:1rem}
.ed{font-size:.78rem;color:var(--faint);font-family:ui-monospace,monospace}
.vhod-top{border:1px solid var(--acc);color:var(--acc-d);padding:.3rem .8rem;border-radius:3px;font-family:"Arial Narrow",sans-serif;font-size:.95rem}
.vhod-top:hover{background:var(--acc);color:#fff;text-decoration:none}

/* layout */
.ref-wrap{max-width:1180px;margin:0 auto;display:grid;grid-template-columns:252px 1fr;gap:0}
.toc{position:sticky;top:0;align-self:start;max-height:100vh;overflow:auto;padding:1.2rem .8rem 2rem 1rem;
  border-right:1px solid var(--line);background:var(--paper);font-family:"Arial Narrow",system-ui,sans-serif}
.toc-h{font-weight:700;text-transform:uppercase;letter-spacing:.07em;font-size:.72rem;color:var(--faint);margin:.1rem 0 .7rem}
.toc-l{list-style:none;margin:0;padding:0;counter-reset:none}
.toc-i a{display:flex;gap:.5rem;color:var(--ink);padding:.2rem .3rem;border-radius:2px;font-size:.95rem}
.toc-i a:hover{background:#ececded9;text-decoration:none;color:var(--acc-d)}
.toc-i.sub a{padding-left:1.3rem;font-size:.88rem;color:var(--mut)}
.toc-i a.on{background:#e1ece9;color:var(--acc-d);font-weight:700}
.toc-no{color:var(--faint);min-width:1.8rem;font-variant-numeric:tabular-nums}
.toc-i.sub .toc-no{min-width:1rem}
.vhod-cta{margin:1.1rem 0 0;border-top:1px dashed var(--line);padding-top:.7rem}
.vhod-cta a{color:var(--acc-d);font-weight:700}

.ref-main{padding:1.2rem 2rem 3rem;min-width:0}
.crumb{font-family:"Arial Narrow",system-ui,sans-serif;font-size:.85rem;color:var(--faint);margin-bottom:.9rem}
.crumb a{color:var(--mut)}

/* note / warn */
.note{background:var(--warn-bg);border-left:4px solid var(--warn-l);padding:.55rem .8rem;margin:.9rem 0;font-size:.95rem}

/* tables - плотные, с рамкой */
.tbl{border-collapse:collapse;width:100%;margin:.7rem 0;font-size:.93rem}
.tbl th,.tbl td{border:1px solid var(--line);padding:.32rem .55rem;text-align:left;vertical-align:top}
.tbl th{background:var(--iso-bg);font-family:"Arial Narrow",system-ui,sans-serif;font-weight:700;color:var(--head);
  font-size:.86rem;line-height:1.2}
.tbl td.n,.tbl td.c{text-align:right;font-family:ui-monospace,monospace;white-space:nowrap}
.tbl td.c{text-align:center}
.tbl tbody tr:nth-child(even) td{background:#fbfbf8}
.tag-iso{font-weight:700;color:var(--acc-d)}
.modes .grp-h td{background:#e6ebe4;font-family:"Arial Narrow",sans-serif;font-weight:700;color:var(--acc-d);font-size:.95rem}
.modes .grp-h a{color:var(--acc-d)}
.idx-map td:first-child,.kv2 td:first-child{white-space:nowrap}
.kv2 td:first-child{color:var(--mut);width:42%}

/* figures / svg */
.fig{margin:1.1rem 0;text-align:center}
.fig svg{max-width:340px;width:100%;height:auto;background:#fff;border:1px solid var(--line);padding:.4rem}
.svl{font-family:"Arial Narrow",system-ui,sans-serif;font-size:10px;fill:#333}
figcaption{font-size:.84rem;color:var(--mut);margin-top:.4rem;font-style:italic}

/* formulas */
.fx-list{list-style:none;counter-reset:fx;margin:1rem 0;padding:0}
.fx-list>li{counter-increment:fx;margin:.8rem 0;padding-left:2rem;position:relative}
.fx-list>li::before{content:"("counter(fx)")";position:absolute;left:0;top:.35rem;color:var(--faint);font-family:ui-monospace,monospace;font-size:.85rem}
.fx{font-family:ui-monospace,"DejaVu Sans Mono",monospace;font-size:1.05rem;background:#fff;border:1px solid var(--line);
  border-left:4px solid var(--acc);padding:.4rem .7rem;display:inline-block;color:var(--head)}
.fx-list p{margin:.25rem 0 0;color:var(--mut);font-size:.92rem}

/* defects */
.defekt{border-top:1px solid var(--line2);padding:.6rem 0 .3rem}
.defekt h3{color:var(--acc-d)}
.d-grp{font-size:.82rem;color:var(--faint);font-family:"Arial Narrow",sans-serif;margin:.1rem 0 .4rem}
.signs{margin:.2rem 0 .4rem 1.1rem}
.d-first{background:#eef4f1;padding:.4rem .7rem;border-radius:3px}
.df-ctrl{display:block;margin:1rem 0;font-family:"Arial Narrow",sans-serif}
.df-ctrl select{font:inherit;padding:.25rem .4rem;border:1px solid var(--line);margin:0 .5rem}

/* listing */
.listing{background:#fff;border:1px solid var(--line);padding:.7rem .9rem;font-size:.84rem;overflow:auto;white-space:pre;border-radius:3px}

/* calculator */
.calc{display:grid;grid-template-columns:repeat(2,1fr);gap:.7rem;background:#fff;border:1px solid var(--line);padding:1rem;margin:1rem 0;border-radius:3px}
.calc label{display:flex;flex-direction:column;gap:.25rem;font-size:.85rem;font-family:"Arial Narrow",sans-serif;color:var(--mut)}
.calc input,.calc select{font:inherit;padding:.4rem .5rem;border:1px solid var(--line);border-radius:2px}
#out .kv2{margin:.6rem 0}

/* seealso */
.seealso{margin-top:1.8rem;border-top:1px solid var(--rule);padding-top:.7rem;font-size:.92rem;color:var(--mut)}
.seealso b{font-family:"Arial Narrow",sans-serif}

/* vhod form */
.vhod-form{max-width:340px;background:#fff;border:1px solid var(--line);padding:1.2rem;margin:1.1rem 0;border-radius:3px;display:flex;flex-direction:column;gap:.7rem}
.vhod-form label{display:flex;flex-direction:column;gap:.25rem;font-size:.86rem;font-family:"Arial Narrow",sans-serif;color:var(--mut)}
.vhod-form input{font:inherit;padding:.5rem .6rem;border:1px solid var(--line);border-radius:2px}
.vhod-form button{background:var(--acc);color:#fff;border:0;padding:.55rem;font:600 1rem/1 "Arial Narrow",system-ui,sans-serif;letter-spacing:.03em;border-radius:3px;cursor:pointer}
.vhod-form button:hover{background:var(--acc-d)}
.vmsg{font-size:.85rem;margin:0;min-height:1rem}
.vmsg.err{color:#a12a1e}
.vmsg.ok{color:#2a3328;background:#eef4f1;border:1px solid #cfe0d8;padding:.55rem .6rem;border-radius:3px}

/* footer */
.ref-foot{border-top:3px double var(--rule);background:#fff;margin-top:2rem;padding:1.6rem 1rem 2rem}
.foot-cols{max-width:1180px;margin:0 auto 1.2rem;display:grid;grid-template-columns:repeat(4,1fr);gap:1.2rem}
.foot-cols h4{font-family:"Arial Narrow",sans-serif;font-size:.8rem;text-transform:uppercase;letter-spacing:.06em;color:var(--faint);margin:0 0 .4rem;border-bottom:1px solid var(--line2);padding-bottom:.2rem}
.foot-cols ul{list-style:none;margin:0;padding:0}
.foot-cols li{margin:.2rem 0}
.foot-cols a{font-size:.88rem;color:#43483c}
.foot-legal{max-width:1180px;margin:0 auto;border-top:1px solid var(--line2);padding-top:.9rem;font-size:.82rem;color:var(--mut)}
.foot-legal .upd{font-family:ui-monospace,monospace;font-size:.76rem}
.foot-legal .cr{color:var(--faint)}

@media (max-width:900px){
  .ref-wrap{grid-template-columns:1fr}
  .toc{position:static;max-height:none;border-right:0;border-bottom:1px solid var(--line);
    columns:2;column-gap:1.2rem}
  .vhod-cta{break-before:column}
  .ref-main{padding:1rem}
  .calc{grid-template-columns:1fr}
  .foot-cols{grid-template-columns:1fr 1fr}
}
@media (max-width:420px){ .toc{columns:1} .foot-cols{grid-template-columns:1fr} .tbl{font-size:.86rem} }