/* Страницы справочника Курсовика. Токены те же, что на главной. */
:root{
  --ground:#ECEFEA; --grid:rgba(35,70,184,.07); --panel:#FFFFFF; --panel-2:#F5F7F3;
  --ink:#18212C; --muted:#5A6470; --line:#D3D8D0; --accent:#2346B8; --accent-ink:#FFFFFF;
  --accent-soft:#E3E9FA; --warn:#9A5B00; --warn-soft:#FBEFD9; --ok:#1F7A45; --ok-soft:#DDF1E4;
  --paper:#FFFFFF; --paper-ink:#111111; --paper-shadow:0 1px 2px rgba(20,30,40,.08),0 8px 24px rgba(20,30,40,.08);
  --ui:"Onest",system-ui,-apple-system,"Segoe UI",sans-serif;
  --mono:"PT Mono",ui-monospace,Consolas,monospace;
  --doc:"Tinos","Times New Roman",Times,serif;
  color-scheme:light;
}
@media (prefers-color-scheme:dark){
  :root:not([data-theme="light"]){
    color-scheme:dark;
    --ground:#11151B; --grid:rgba(124,155,255,.06); --panel:#1A2029; --panel-2:#202732;
    --ink:#E6E9EE; --muted:#9AA3AE; --line:#2C3542; --accent:#7C9BFF; --accent-ink:#0D1320;
    --accent-soft:#1F2A47; --warn:#E8B45C; --warn-soft:#3A2D14; --ok:#6FCF97; --ok-soft:#173826;
    --paper:#E8E8E3; --paper-ink:#141414; --paper-shadow:0 8px 24px rgba(0,0,0,.4);
  }
}
:root[data-theme="dark"]{
  color-scheme:dark;
  --ground:#11151B; --grid:rgba(124,155,255,.06); --panel:#1A2029; --panel-2:#202732;
  --ink:#E6E9EE; --muted:#9AA3AE; --line:#2C3542; --accent:#7C9BFF; --accent-ink:#0D1320;
  --accent-soft:#1F2A47; --warn:#E8B45C; --warn-soft:#3A2D14; --ok:#6FCF97; --ok-soft:#173826;
  --paper:#E8E8E3; --paper-ink:#141414; --paper-shadow:0 8px 24px rgba(0,0,0,.4);
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0; background-color:var(--ground);
  background-image:linear-gradient(var(--grid) 1px,transparent 1px),linear-gradient(90deg,var(--grid) 1px,transparent 1px);
  background-size:10mm 10mm;
  color:var(--ink); font-family:var(--ui); font-size:16px; line-height:1.6;
  padding-inline:16px; padding-block:0 48px;
}
[hidden]{display:none!important}
img{max-width:100%}
a{color:var(--accent)}
button,input,select,textarea{font:inherit;color:inherit}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.wrap{max-width:1180px;margin:0 auto}

/* шапка */
.top{display:flex;align-items:center;gap:12px;padding-block:18px;flex-wrap:wrap}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:19px;letter-spacing:-.01em;color:var(--ink);text-decoration:none}
.mark{width:30px;height:30px;border:2px solid var(--ink);display:grid;place-items:center;font-family:var(--mono);font-size:15px;position:relative}
.mark::after{content:"";position:absolute;right:-2px;bottom:-2px;width:12px;height:8px;border-left:2px solid var(--ink);border-top:2px solid var(--ink)}
.topnav{margin-left:auto;display:flex;flex-wrap:wrap;gap:4px 18px;font-size:14px}
.topnav a{color:var(--muted);text-decoration:none;padding-block:4px}
.topnav a:hover,.topnav a[aria-current]{color:var(--accent)}
@media (max-width:640px){.topnav{margin-left:0;width:100%;gap:4px 14px}}

/* раскладка */
.crumbs{font-size:13px;color:var(--muted);margin:6px 0 10px}
.crumbs a{color:var(--muted)}
.layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:32px;align-items:start}
@media (max-width:980px){.layout{grid-template-columns:minmax(0,1fr)}}
article{background:var(--panel);border:1px solid var(--line);border-radius:6px;padding:28px clamp(16px,4vw,44px) 36px;min-width:0}
article h1{font-size:clamp(28px,4vw,40px);line-height:1.12;letter-spacing:-.025em;font-weight:800;margin:0 0 12px;text-wrap:balance}
article .lead{font-size:18px;color:var(--muted);margin:0 0 20px;max-width:64ch}
article .updated{font-family:var(--mono);font-size:12px;color:var(--muted);letter-spacing:.04em;margin:0 0 22px}
article h2{font-size:23px;line-height:1.25;letter-spacing:-.015em;margin:38px 0 10px;text-wrap:balance;scroll-margin-top:16px}
article h3{font-size:18px;margin:26px 0 8px;scroll-margin-top:16px}
article p,article li{max-width:70ch}
article p{margin:0 0 14px}
article ul,article ol{margin:0 0 16px;padding-left:1.4em}
article li{margin-bottom:6px}
article li::marker{color:var(--muted)}
.toc{border:1px solid var(--line);border-radius:4px;padding:12px 16px;background:var(--panel-2);margin:0 0 8px}
.toc b{display:block;font-size:12px;text-transform:uppercase;letter-spacing:.06em;color:var(--muted);margin-bottom:6px}
.toc ol{margin:0;padding-left:1.3em;columns:2;column-gap:28px}
@media (max-width:640px){.toc ol{columns:1}}
.toc li{margin:0 0 4px;break-inside:avoid;font-size:15px}

/* таблицы */
.table-wrap{overflow-x:auto;margin:0 0 18px}
table.t{width:100%;border-collapse:collapse;font-size:15px;min-width:460px}
table.t th{text-align:left;font-size:12px;text-transform:uppercase;letter-spacing:.06em;color:var(--muted);font-weight:600;padding:8px 12px 8px 0;border-bottom:1px solid var(--line);vertical-align:bottom}
table.t td{padding:9px 12px 9px 0;border-bottom:1px solid var(--line);vertical-align:top;font-variant-numeric:tabular-nums}
table.t td.m{font-family:var(--mono);font-size:14px}

/* заметки и врезки */
.note{border-left:3px solid var(--accent);background:var(--accent-soft);padding:12px 16px;border-radius:0 4px 4px 0;margin:0 0 18px;max-width:70ch}
.note.warn{border-color:var(--warn);background:var(--warn-soft)}
.note p:last-child{margin:0}
.formula{font-family:var(--mono);background:var(--panel-2);border:1px solid var(--line);border-radius:4px;padding:10px 14px;margin:0 0 16px;overflow-x:auto;white-space:pre}

/* лист бумаги с образцом */
.paper{background:var(--paper);color:var(--paper-ink);box-shadow:var(--paper-shadow);font-family:var(--doc);font-size:15px;line-height:1.5;
  padding:28px 22px 28px 40px;margin:0 0 20px;max-width:620px;border-radius:2px}
.paper p{margin:0;text-indent:1.25cm;text-align:justify;max-width:none}
.paper .c{text-align:center;text-indent:0}
.paper .r{text-indent:0;margin-left:50%}
.paper .h{text-align:center;text-indent:0;font-weight:700;text-transform:uppercase;margin:0 0 10px}
.paper .h2{text-indent:1.25cm;font-weight:700;margin:12px 0 6px}
.paper .gap{height:18px}
.paper ol{padding-left:1.25cm;margin:0}
.paper ol li{max-width:none;margin:0;text-align:justify}
.paper .toc-row{display:flex;gap:.4em;align-items:baseline;text-indent:0}
.paper .toc-row i{flex:1;border-bottom:1px dotted #777;transform:translateY(-.3em)}
.paper .toc-row.s{padding-left:1.2em}
.paper table{border-collapse:collapse;width:100%;font-size:14px;margin:6px 0 10px}
.paper td,.paper th{border:1px solid #333;padding:3px 6px;text-align:center}
.paper .cap{text-indent:0;margin:8px 0 2px}
.paper-label{font-family:var(--mono);font-size:12px;color:var(--muted);letter-spacing:.04em;margin:0 0 6px}

/* списки тем */
.topics{counter-reset:t;list-style:none;padding:0;margin:0 0 18px}
.topics li{counter-increment:t;display:grid;grid-template-columns:2.2em 1fr;gap:6px;padding:7px 0;border-bottom:1px solid var(--line);max-width:none}
.topics li::before{content:counter(t);font-family:var(--mono);font-size:13px;color:var(--muted);padding-top:3px}
.chips{display:flex;flex-wrap:wrap;gap:8px;margin:0 0 18px}
.chips a{border:1px solid var(--line);border-radius:99px;padding:4px 12px;font-size:14px;text-decoration:none;color:var(--ink);background:var(--panel)}
.chips a:hover{border-color:var(--accent);color:var(--accent)}

/* инструмент на странице */
.tool{border:1.5px solid var(--ink);border-radius:6px;background:var(--panel-2);padding:18px;margin:6px 0 24px}
.tool h2,.tool h3{margin-top:0}
.tool .grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin-bottom:12px}
@media (max-width:560px){.tool .grid{grid-template-columns:1fr}}
.f{display:flex;flex-direction:column;gap:5px;min-width:0}
.f.full{grid-column:1/-1}
label,.lbl{font-size:12px;text-transform:uppercase;letter-spacing:.06em;color:var(--muted);font-weight:600}
.chk{text-transform:none;letter-spacing:0;font-weight:400;font-size:14px;color:var(--ink);display:flex;gap:8px;align-items:center}
.chk input{width:auto;margin:0;accent-color:var(--accent)}
input,select,textarea{background:var(--panel);border:1px solid var(--line);border-radius:4px;padding:9px 11px;width:100%;min-width:0}
input:focus,select:focus,textarea:focus{border-color:var(--accent);outline:none;box-shadow:0 0 0 3px var(--accent-soft)}
.btn{display:inline-flex;align-items:center;gap:8px;border:1px solid var(--line);background:var(--panel);border-radius:4px;padding:9px 16px;cursor:pointer;font-weight:500;font-size:15px;text-decoration:none;color:var(--ink);white-space:nowrap}
.btn:hover{border-color:var(--ink)}
.btn.primary{background:var(--accent);border-color:var(--accent);color:var(--accent-ink)}
.btn.primary:hover{filter:brightness(1.08)}
.btn:disabled{opacity:.5;cursor:default}
.row{display:flex;gap:10px;flex-wrap:wrap;align-items:center}
.status{font-size:14px;color:var(--muted);min-height:1.3em;margin:8px 0 0}
.status.err{color:var(--warn)}
.out{margin-top:12px}
.out .topics li{grid-template-columns:2.2em 1fr auto;align-items:start}
.out .why{display:block;font-size:13px;color:var(--muted)}
.bib-list{font-family:var(--doc);font-size:15px;line-height:1.5;padding-left:1.6em;margin:10px 0}
.bib-list li{margin-bottom:6px;max-width:none}
.bib-out{font-family:var(--doc);font-size:16px;background:var(--paper);color:var(--paper-ink);border:1px solid var(--line);border-radius:4px;padding:10px 14px;margin:10px 0;overflow-wrap:anywhere}

/* боковая колонка */
aside.side{position:sticky;top:16px;display:flex;flex-direction:column;gap:14px}
@media (max-width:980px){aside.side{position:static}}
.cta{background:var(--accent);color:var(--accent-ink);border-radius:6px;padding:18px}
.cta b{display:block;font-size:18px;line-height:1.25;margin-bottom:6px}
.cta p{margin:0 0 12px;font-size:14px;opacity:.92}
.cta a.btn{background:var(--accent-ink);color:var(--accent);border-color:var(--accent-ink);font-weight:600}
.side-links{background:var(--panel);border:1px solid var(--line);border-radius:6px;padding:14px 16px}
.side-links b{display:block;font-size:12px;text-transform:uppercase;letter-spacing:.06em;color:var(--muted);margin-bottom:6px}
.side-links a{display:block;padding:4px 0;font-size:15px;text-decoration:none}
.side-links a:hover{text-decoration:underline}

/* вопросы */
.faq dl{margin:0}
.faq dt{font-weight:600;margin-top:16px}
.faq dd{margin:4px 0 0;color:var(--muted);max-width:70ch}

/* подвал */
.foot{margin-top:36px;padding-top:16px;border-top:1px solid var(--line);color:var(--muted);font-size:13px;display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,220px),1fr));gap:8px 24px}
.foot a{color:var(--muted)}
.foot nav{display:flex;flex-direction:column;gap:2px}
@media (prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}}