/* ============================================================
   НейроМиша — Теория ЕГЭ. Общие стили раздела /teoriya/
   ============================================================ */
:root{
  --brand:#DF995B; --brand-ink:#B36E30; --brand-deep:#8C5422; --brand-soft:#F6D9B8;
  --sec:#496F82; --sec-ink:#2F4E5E; --sec-soft:#C9DCE6;
  --bg:#FCEDD0; --bg-warm:#F9E4BE; --bg-deep:#F4DAAF; --surface:#FFFDF8;
  --ink:#1F2937; --ink-2:#4B5563; --ink-3:#6B7280;
  --line:rgba(31,41,55,.08); --line-2:rgba(31,41,55,.14);
  --shadow-sm:0 1px 2px rgba(79,54,24,.06),0 2px 6px rgba(79,54,24,.05);
  --shadow-md:0 4px 10px rgba(79,54,24,.06),0 18px 40px -12px rgba(79,54,24,.18);
  --shadow-lg:0 8px 20px rgba(79,54,24,.08),0 40px 80px -20px rgba(79,54,24,.28);
  --radius:22px; --gold:#F59E0B; --good:#10B981; --bad:#EF4444;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
html,body{margin:0;padding:0}
body{
  font-family:'Manrope',system-ui,-apple-system,'Segoe UI',sans-serif;
  color:var(--ink); background:var(--bg);
  -webkit-font-smoothing:antialiased; text-rendering:optimizeLegibility;
  line-height:1.6;
}
h1,h2,h3,h4{font-family:'Unbounded','Manrope',sans-serif;letter-spacing:-.02em;margin:0;font-weight:700;text-wrap:balance}
p{margin:0;text-wrap:pretty}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
button{font-family:inherit}
.wrap{max-width:1200px;margin:0 auto;padding:0 28px}
@media(max-width:760px){.wrap{padding:0 18px}}

.hl{background:linear-gradient(120deg,#DF995B,#B36E30);-webkit-background-clip:text;background-clip:text;color:transparent}

/* pills / badges */
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  padding:7px 14px 7px 8px;border-radius:999px;
  background:var(--surface);border:1px solid var(--line);
  font-size:13px;font-weight:600;color:var(--ink-2);box-shadow:var(--shadow-sm);
}
.eyebrow .pill{
  padding:3px 10px;border-radius:999px;font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;
  background:linear-gradient(135deg,#DF995B,#E8B07C);color:#fff;font-weight:700;
}
.tag{
  display:inline-block;padding:7px 14px;border-radius:999px;
  background:var(--brand-soft);color:var(--brand-ink);
  font-family:'Unbounded',sans-serif;font-size:11px;font-weight:700;
  letter-spacing:.14em;text-transform:uppercase;
}

/* buttons */
.btn{
  display:inline-flex;align-items:center;gap:10px;
  padding:15px 24px;border-radius:16px;font-weight:700;font-size:15px;
  cursor:pointer;border:none;font-family:inherit;
  transition:transform .22s ease,box-shadow .22s ease,background .2s;
}
.btn svg{width:17px;height:17px}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 10px 24px -8px rgba(223,153,91,.7),inset 0 -3px 0 rgba(0,0,0,.14)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 16px 30px -10px rgba(223,153,91,.8),inset 0 -3px 0 rgba(0,0,0,.14)}
.btn-ghost{background:var(--surface);color:var(--ink);border:1px solid var(--line);box-shadow:var(--shadow-sm)}
.btn-ghost:hover{transform:translateY(-2px);box-shadow:var(--shadow-md)}

/* reveal */
.reveal{opacity:0;transform:translateY(30px);transition:opacity .8s cubic-bezier(.22,1,.36,1),transform .8s cubic-bezier(.22,1,.36,1)}
.reveal.in{opacity:1;transform:none}
.reveal.d1{transition-delay:.09s}.reveal.d2{transition-delay:.18s}
.reveal.d3{transition-delay:.27s}.reveal.d4{transition-delay:.36s}
@media(prefers-reduced-motion:reduce){.reveal{opacity:1!important;transform:none!important;transition:none!important}}

/* section heading */
.sec-head{text-align:center;max-width:760px;margin:0 auto 50px}
.sec-head h2{font-size:clamp(30px,4vw,46px);line-height:1.1;margin:16px 0 12px}
.sec-head p{color:var(--ink-2);font-size:17px;line-height:1.6}

/* breadcrumbs */
.crumbs{display:flex;align-items:center;gap:8px;font-size:13.5px;color:var(--ink-3);font-weight:600;flex-wrap:wrap}
.crumbs a{color:var(--ink-3);transition:color .2s}
.crumbs a:hover{color:var(--brand-ink)}
.crumbs .sep{opacity:.5}
.crumbs .cur{color:var(--brand-ink)}

/* progress bar */
.prog{height:8px;border-radius:999px;background:rgba(223,153,91,.16);overflow:hidden;position:relative}
.prog>i{position:absolute;left:0;top:0;bottom:0;border-radius:999px;background:linear-gradient(90deg,#F3B880,#DF995B);transition:width .5s cubic-bezier(.22,1,.36,1)}

/* mascot float */
@keyframes floaty{0%,100%{transform:translateY(0) rotate(-1.5deg)}50%{transform:translateY(-14px) rotate(1.5deg)}}
.floaty{animation:floaty 7s ease-in-out infinite;filter:drop-shadow(0 30px 40px rgba(79,54,24,.28))}
@media(prefers-reduced-motion:reduce){.floaty{animation:none}}

/* header/footer placeholders keep their own styles from partials */
#site-header:empty,#site-footer:empty{min-height:0}

/* ============ HUB (template 1) ============ */
.t-hero{
  position:relative;padding:140px 0 70px;overflow:hidden;
  background:
    radial-gradient(900px 500px at 85% -12%,rgba(223,153,91,.28),transparent 60%),
    radial-gradient(700px 460px at -8% 50%,rgba(73,111,130,.14),transparent 60%),
    linear-gradient(180deg,var(--bg) 0%,#FFF4DC 100%);
}
.t-hero .wrap{display:grid;grid-template-columns:1.08fr .92fr;gap:40px;align-items:center}
.t-hero h1{font-size:clamp(38px,5.2vw,64px);line-height:1.03;margin:20px 0 18px}
.t-hero .lead{font-size:19px;color:var(--ink-2);line-height:1.55;max-width:540px}
.t-hero .cta-row{display:flex;gap:14px;margin-top:30px;flex-wrap:wrap}
.t-hero .metrics{display:flex;gap:30px;margin-top:36px;padding-top:26px;border-top:1px dashed var(--line-2);flex-wrap:wrap}
.t-hero .metric .num{font-family:'Unbounded',sans-serif;font-weight:700;font-size:26px;letter-spacing:-.02em}
.t-hero .metric .lbl{font-size:13px;color:var(--ink-3);margin-top:4px;max-width:130px;line-height:1.3}

.hero-stage{position:relative;min-height:460px}
.hero-stage .blob{position:absolute;border-radius:50%;filter:blur(48px);opacity:.5;z-index:0}
.hero-stage .blob.a{width:330px;height:330px;background:#F2C896;top:20px;right:0}
.hero-stage .blob.b{width:250px;height:250px;background:#BEDAE5;bottom:30px;left:-20px}
.hero-stage .mascot{position:relative;z-index:2;width:100%;max-width:400px;margin:0 auto}
.float-chip{
  position:absolute;z-index:3;background:var(--surface);border:1px solid var(--line);
  border-radius:16px;padding:13px 16px;box-shadow:var(--shadow-lg);
  display:flex;align-items:center;gap:11px;
}
.float-chip .ic{width:38px;height:38px;border-radius:11px;display:grid;place-items:center;flex-shrink:0;color:#fff}
.float-chip .ic svg{width:19px;height:19px}
.float-chip .tx .top{font-family:'Unbounded',sans-serif;font-weight:700;font-size:13.5px;line-height:1.15}
.float-chip .tx .sub{font-size:11.5px;color:var(--ink-3);margin-top:2px}
.float-chip.c1{top:34px;right:0;animation:floaty 6.5s ease-in-out infinite}
.float-chip.c1 .ic{background:linear-gradient(160deg,#FFE0B8,#DF995B)}
.float-chip.c2{bottom:48px;left:0;animation:floaty 6s ease-in-out infinite .5s}
.float-chip.c2 .ic{background:linear-gradient(160deg,#C9E2EF,#496F82)}

@media(max-width:980px){
  .t-hero .wrap{grid-template-columns:1fr}
  .hero-stage{min-height:340px;margin-top:10px}
  .hero-stage .mascot{max-width:280px}
}

/* subjects grid */
.subjects-sec{padding:90px 0;background:linear-gradient(180deg,#FFF4DC 0%,var(--bg-warm) 100%)}
.subjects-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.subj-card{
  background:var(--surface);border:1px solid var(--line);border-radius:20px;padding:22px;
  box-shadow:var(--shadow-sm);transition:transform .3s,box-shadow .3s,border-color .3s;
  display:flex;flex-direction:column;gap:14px;cursor:pointer;
}
.subj-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:var(--brand-soft)}
.subj-card .ini{
  width:52px;height:52px;border-radius:15px;display:grid;place-items:center;
  font-family:'Unbounded',sans-serif;font-weight:800;font-size:22px;color:#fff;
  box-shadow:inset 0 -2px 0 rgba(0,0,0,.12);
}
.subj-card h3{font-size:16.5px;line-height:1.2}
.subj-card .meta{font-size:12.5px;color:var(--ink-3);font-weight:600;margin-top:-6px}
.subj-card .pbar{margin-top:auto}
.subj-card .pbar .lbl{display:flex;justify-content:space-between;font-size:11.5px;color:var(--ink-3);font-weight:600;margin-bottom:6px}
.subj-card .arrow{display:flex;align-items:center;gap:6px;font-size:13px;font-weight:700;color:var(--brand-ink)}
.subj-card .arrow svg{width:13px;height:13px;transition:transform .2s}
.subj-card:hover .arrow svg{transform:translateX(3px)}
/* color variants */
.g-a{background:linear-gradient(160deg,#F3B880,#B36E30)}
.g-b{background:linear-gradient(160deg,#82B5CC,#2F4E5E)}
.g-c{background:linear-gradient(160deg,#6BD8AF,#0E8C66)}
.g-d{background:linear-gradient(160deg,#F0B964,#B97500)}
.g-e{background:linear-gradient(160deg,#E89B7C,#B3502E)}
.g-f{background:linear-gradient(160deg,#A9A0E0,#5B4F9E)}
@media(max-width:1100px){.subjects-grid{grid-template-columns:repeat(3,1fr)}}
@media(max-width:760px){.subjects-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:430px){.subjects-grid{grid-template-columns:1fr}}

/* capabilities */
.caps-sec{padding:90px 0;background:linear-gradient(180deg,var(--bg-warm) 0%,var(--bg) 100%)}
.caps-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.cap-card{
  background:var(--surface);border:1px solid var(--line);border-radius:20px;padding:26px 22px;
  box-shadow:var(--shadow-sm);transition:transform .3s,box-shadow .3s;
}
.cap-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-md)}
.cap-card .ic{
  width:50px;height:50px;border-radius:14px;display:grid;place-items:center;margin-bottom:15px;
  background:var(--brand-soft);color:var(--brand-deep);box-shadow:inset 0 -2px 0 rgba(0,0,0,.06);
}
.cap-card.s .ic{background:var(--sec-soft);color:var(--sec-ink)}
.cap-card.g .ic{background:#D7F2E5;color:#0E8C66}
.cap-card.go .ic{background:#FFEDC9;color:#B97500}
.cap-card .ic svg{width:24px;height:24px}
.cap-card h3{font-size:17px;margin-bottom:8px;line-height:1.2}
.cap-card p{color:var(--ink-2);font-size:14px;line-height:1.55}
@media(max-width:900px){.caps-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:520px){.caps-grid{grid-template-columns:1fr}}

/* final CTA */
.final-cta{padding:80px 0 100px;background:linear-gradient(180deg,var(--bg) 0%,#FFF4DC 100%)}
.final-wrap{
  background:linear-gradient(160deg,#FFE2BC 0%,#DF995B 100%);border-radius:34px;
  padding:54px 50px;display:grid;grid-template-columns:1.2fr .8fr;gap:30px;align-items:center;
  position:relative;overflow:hidden;box-shadow:var(--shadow-lg);
}
.final-wrap::before{content:"";position:absolute;inset:-20% -10% auto auto;width:400px;height:400px;background:radial-gradient(circle,rgba(255,255,255,.4),transparent 70%);pointer-events:none}
.final-wrap h2{font-size:clamp(28px,3.6vw,44px);color:#fff;line-height:1.05}
.final-wrap p{color:#FFF6E5;font-size:17px;line-height:1.55;margin-top:16px;max-width:480px}
.final-wrap .cta-row{margin-top:26px;display:flex;gap:12px;flex-wrap:wrap;position:relative;z-index:1}
.final-wrap .btn-primary{background:#fff;color:var(--brand-deep)}
.final-wrap .btn-ghost{background:rgba(255,255,255,.18);border-color:rgba(255,255,255,.4);color:#fff}
.final-mascot{width:100%;max-width:260px;justify-self:center;position:relative;z-index:1}
@media(max-width:760px){
  .final-wrap{grid-template-columns:1fr;padding:38px 26px;text-align:center}
  .final-wrap p{margin-left:auto;margin-right:auto}.final-wrap .cta-row{justify-content:center}
  .final-mascot{max-width:200px}
}

/* ============ SUBJECT (template 2) ============ */
.subj-hero{padding:120px 0 40px;background:linear-gradient(180deg,var(--bg) 0%,#FFF4DC 100%)}
.subj-hero h1{font-size:clamp(32px,4.4vw,50px);line-height:1.05;margin:16px 0 14px}
.subj-hero .lead{font-size:18px;color:var(--ink-2);max-width:620px;line-height:1.55}
.subj-hero .overall{margin-top:26px;max-width:560px}
.subj-hero .overall .lbl{display:flex;justify-content:space-between;font-size:13px;font-weight:600;color:var(--ink-2);margin-bottom:8px}
.subj-hero .overall .lbl b{font-family:'Unbounded',sans-serif;color:var(--brand-deep)}

.subj-body{padding:40px 0 90px;background:linear-gradient(180deg,#FFF4DC 0%,var(--bg-warm) 100%)}
.subj-body .wrap{display:grid;grid-template-columns:280px 1fr;gap:34px;align-items:start}

/* sticky TOC sidebar */
.toc{position:sticky;top:90px;background:var(--surface);border:1px solid var(--line);border-radius:20px;padding:22px;box-shadow:var(--shadow-sm)}
.toc h4{font-family:'Unbounded',sans-serif;font-size:12px;letter-spacing:.12em;text-transform:uppercase;color:var(--ink-3);margin-bottom:14px}
.toc .toc-prog{margin-bottom:16px}
.toc .toc-prog .lbl{font-size:12px;color:var(--ink-3);font-weight:600;margin-bottom:7px;display:flex;justify-content:space-between}
.toc ul{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:2px}
.toc li a{
  display:flex;align-items:center;gap:9px;padding:9px 11px;border-radius:11px;
  font-size:13.5px;font-weight:600;color:var(--ink-2);transition:all .2s;
}
.toc li a:hover{background:var(--bg);color:var(--brand-deep)}
.toc li a.active{background:var(--brand-soft);color:var(--brand-deep)}
.toc li a .dot{width:8px;height:8px;border-radius:50%;background:var(--line-2);flex-shrink:0}
.toc li a.done .dot{background:var(--good)}
.toc li a.active .dot{background:var(--brand)}

/* mobile TOC */
.toc-mobile{display:none}

.topics-head{display:flex;align-items:center;gap:12px;margin:6px 0 16px}
.topics-head h2{font-size:15px;font-family:'Unbounded',sans-serif;color:var(--sec-ink);letter-spacing:.02em}
.topics-head .line{flex:1;height:1px;background:var(--line-2)}
.topics-head .kim{font-size:12px;color:var(--ink-3);font-weight:700;background:var(--surface);border:1px solid var(--line);padding:4px 10px;border-radius:999px}

.topics-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;margin-bottom:30px}
.topic-card{
  position:relative;background:var(--surface);border:1px solid var(--line);border-radius:18px;
  padding:22px 22px 20px;box-shadow:var(--shadow-sm);overflow:hidden;
  transition:transform .3s,box-shadow .3s,border-color .3s;cursor:pointer;display:flex;flex-direction:column;gap:10px;
}
.topic-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-md);border-color:var(--brand-soft)}
.topic-card .knum{position:absolute;top:14px;right:20px;font-family:'Unbounded',sans-serif;font-weight:800;font-size:34px;color:var(--brand);opacity:.16;line-height:1}
.topic-card .chk{width:24px;height:24px;border-radius:50%;border:2px solid var(--line-2);display:grid;place-items:center;color:transparent;transition:all .25s}
.topic-card.done .chk{background:var(--good);border-color:var(--good);color:#fff}
.topic-card .chk svg{width:13px;height:13px}
.topic-card h3{font-size:17px;line-height:1.22;padding-right:38px}
.topic-card p{font-size:13.5px;color:var(--ink-2);line-height:1.5}
.topic-card .tags{display:flex;gap:6px;flex-wrap:wrap;margin-top:auto;padding-top:6px}
.topic-card .t{font-size:11px;font-weight:700;padding:4px 10px;border-radius:999px;background:var(--bg);color:var(--ink-2)}
.topic-card .t.long{background:var(--sec-soft);color:var(--sec-ink)}
.topic-card .t.hard{background:#FCE3E3;color:#C0392B}
.topic-card .t.gold{background:#FFEDC9;color:#B97500}
.topic-card .go{display:inline-flex;align-items:center;gap:6px;font-size:13px;font-weight:700;color:var(--brand-ink)}
.topic-card .go svg{width:13px;height:13px;transition:transform .2s}
.topic-card:hover .go svg{transform:translateX(3px)}
@media(max-width:980px){
  .subj-body .wrap{grid-template-columns:1fr}
  .toc{display:none}
  .toc-mobile{display:block;margin-bottom:24px}
  .toc-mobile select{width:100%;padding:14px 16px;border-radius:14px;border:1.5px solid var(--line-2);background:var(--surface);font-family:inherit;font-size:15px;font-weight:600;color:var(--ink);appearance:none;cursor:pointer}
}
@media(max-width:560px){.topics-grid{grid-template-columns:1fr}}

/* ============ ARTICLE (template 3) ============ */
.art-body{padding:34px 0 90px;background:linear-gradient(180deg,#FFF4DC 0%,var(--bg-warm) 100%)}
.art-body .wrap{display:grid;grid-template-columns:280px 1fr;gap:38px;align-items:start}

/* article sidebar */
.art-side{position:sticky;top:84px}
.art-side-inner{background:var(--surface);border:1px solid var(--line);border-radius:20px;padding:22px;box-shadow:var(--shadow-sm)}
.art-side h4{font-size:16px;font-family:'Unbounded',sans-serif;line-height:1.2;margin-bottom:14px}
.art-side .sp{margin-bottom:16px}
.art-side .sp .lbl{display:flex;justify-content:space-between;font-size:12px;color:var(--ink-3);font-weight:600;margin-bottom:7px}
.art-side .sp .lbl b{font-family:'Unbounded',sans-serif;color:var(--brand-deep)}
.art-nav-tree{display:flex;flex-direction:column;gap:3px}
.art-nav-tree .grp{font-family:'Unbounded',sans-serif;font-size:10px;letter-spacing:.14em;text-transform:uppercase;color:var(--ink-3);padding:14px 10px 6px}
.art-nav-tree a{display:flex;align-items:center;gap:10px;padding:9px 11px;border-radius:11px;font-size:13.5px;font-weight:600;color:var(--ink-2);transition:all .2s}
.art-nav-tree a:hover{background:var(--bg);color:var(--brand-deep)}
.art-nav-tree a.active{background:var(--brand-soft);color:var(--brand-deep)}
.art-nav-tree a .dot{width:8px;height:8px;border-radius:50%;background:var(--line-2);flex-shrink:0;transition:all .2s}
.art-nav-tree a.done .dot{background:var(--good)}
.art-nav-tree a.active .dot{background:var(--brand)}
.art-nav-tree a.done .dot svg{display:none}
.art-side .pn{display:flex;justify-content:space-between;gap:8px;margin-top:18px;padding-top:16px;border-top:1px dashed var(--line-2)}
.art-side .pn a{font-size:12px;font-weight:700;color:var(--ink-3);transition:color .2s;max-width:46%}
.art-side .pn a:hover{color:var(--brand-ink)}

/* mobile slide-panel */
.art-side-toggle{display:none}
.art-side-backdrop{display:none}

/* article content */
.art-main{min-width:0;display:flex;flex-direction:column;gap:30px}
.art-header h1{font-size:clamp(30px,4vw,44px);line-height:1.06;margin:14px 0 14px}
.art-header .meta{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:16px}
.art-header .meta .m{display:inline-flex;align-items:center;gap:7px;font-size:13px;font-weight:600;color:var(--ink-2);background:var(--surface);border:1px solid var(--line);padding:7px 13px;border-radius:999px}
.art-header .meta .m svg{width:14px;height:14px;color:var(--brand-ink)}
.art-header .lead{font-size:18px;color:var(--ink-2);line-height:1.6;max-width:680px}

/* generic content card */
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow-md);padding:28px 30px}
.card h3{font-size:21px;margin-bottom:12px;line-height:1.2}
.card h3 .knum-inline{color:var(--brand);font-family:'Unbounded',sans-serif}
.card p{color:var(--ink-2);font-size:15.5px;line-height:1.7}
.card p+p{margin-top:12px}
.card p b,.card li b{color:var(--ink);font-weight:700}

/* formula box */
.formula-box{
  margin:16px 0;padding:18px 22px;border-radius:14px;
  background:linear-gradient(160deg,#FFF8EC,#FFF1DC);border:1px solid var(--brand-soft);
  text-align:center;overflow-x:auto;
}
.formula-box .katex{font-size:1.35em}

/* SVG figure */
.figure{margin:18px 0 6px;display:flex;flex-direction:column;align-items:center;gap:10px}
.figure svg{max-width:100%;height:auto}
.figure .cap{font-size:12.5px;color:var(--ink-3);font-weight:600;text-align:center}

/* two-up theory: text + figure */
.theory-card .row{display:grid;grid-template-columns:1fr 280px;gap:24px;align-items:center}
.theory-card .row.wide{grid-template-columns:1fr}
@media(max-width:680px){.theory-card .row{grid-template-columns:1fr}}

/* example */
.example-box{
  background:rgba(245,158,11,.10);border:1px solid rgba(245,158,11,.28);border-left:4px solid var(--gold);
  border-radius:14px;padding:20px 22px;
}
.example-box .lbl{display:inline-flex;align-items:center;gap:7px;font-family:'Unbounded',sans-serif;font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:#B97500;font-weight:700;margin-bottom:12px}
.example-box .lbl svg{width:15px;height:15px}
.example-box .q{font-size:15px;color:var(--ink);font-weight:600;margin-bottom:10px}
.example-box .sol{font-size:14.5px;color:var(--ink-2);line-height:1.7}
.example-box .sol .step{display:block;padding:4px 0}

/* algorithm */
.algorithm-card .algorithm-step{display:flex;gap:14px;padding:11px 0;border-top:1px dashed var(--line-2)}
.algorithm-card .algorithm-step:first-of-type{border-top:none}
.algorithm-card .algorithm-step .n{
  width:30px;height:30px;border-radius:50%;flex-shrink:0;background:var(--sec);color:#fff;
  display:grid;place-items:center;font-family:'Unbounded',sans-serif;font-weight:800;font-size:13px;
  box-shadow:inset 0 -2px 0 rgba(0,0,0,.14);
}
.algorithm-card .algorithm-step .tx{font-size:15px;color:var(--ink-2);line-height:1.55;padding-top:3px}
.algorithm-card .algorithm-step .tx b{color:var(--ink)}

/* mistakes */
.mistakes-card .mistake-item{display:flex;gap:16px;padding:18px 0;border-top:1px dashed var(--line-2)}
.mistakes-card .mistake-item:first-of-type{border-top:none}
.mistakes-card .mistake-item .badge{flex-shrink:0;align-self:flex-start;font-size:11px;font-weight:800;font-family:'Unbounded',sans-serif;letter-spacing:.04em;background:rgba(239,68,68,.12);color:var(--bad);padding:6px 11px;border-radius:999px;white-space:nowrap}
.mistakes-card .mistake-item .body{flex:1}
.mistakes-card .mistake-item .body p{font-size:14.5px}
.mistakes-card .mistake-item .body .mini{margin-top:10px}

/* remember grid */
.remember-card{background:linear-gradient(160deg,#FFFCF4,#FFF6E6);border-color:var(--brand-soft)}
.remember-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:6px}
.remember-grid .tile{background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:15px 16px;display:flex;flex-direction:column;gap:8px}
.remember-grid .tile .n{width:24px;height:24px;border-radius:8px;background:var(--brand-soft);color:var(--brand-deep);display:grid;place-items:center;font-family:'Unbounded',sans-serif;font-weight:800;font-size:11px}
.remember-grid .tile .f{font-size:14px;color:var(--ink);font-weight:600;line-height:1.4}
.remember-grid .tile .f .katex{font-size:1.05em}
@media(max-width:680px){.remember-grid{grid-template-columns:1fr 1fr}}
@media(max-width:430px){.remember-grid{grid-template-columns:1fr}}

/* strategy */
.strategy-card{border-left:4px solid var(--gold);background:linear-gradient(160deg,#FFF8EC,#FFFDF8)}
.strategy-card ul{list-style:none;margin:8px 0 0;padding:0;display:flex;flex-direction:column;gap:12px}
.strategy-card li{display:flex;gap:12px;font-size:15px;color:var(--ink-2);line-height:1.55}
.strategy-card li .v{flex-shrink:0;width:22px;height:22px;border-radius:50%;background:rgba(245,158,11,.18);color:#B97500;display:grid;place-items:center;margin-top:1px}
.strategy-card li .v svg{width:13px;height:13px}

/* mark read button */
.mark-row{display:flex;align-items:center;gap:16px;flex-wrap:wrap}
.btn-mark-read{
  display:inline-flex;align-items:center;gap:10px;padding:15px 24px;border-radius:16px;
  background:var(--surface);border:2px solid var(--brand);color:var(--brand-deep);
  font-family:inherit;font-weight:700;font-size:15px;cursor:pointer;transition:all .25s;
}
.btn-mark-read svg{width:18px;height:18px}
.btn-mark-read:hover{background:var(--brand-soft)}
.btn-mark-read.done{background:var(--good);border-color:var(--good);color:#fff}
.btn-mark-read.done:hover{background:#0E8C66}
.mark-row .hint{font-size:13px;color:var(--ink-3)}

/* article nav cards */
.art-pn-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.art-pn-grid a{
  background:var(--surface);border:1px solid var(--line);border-radius:18px;padding:20px 22px;
  box-shadow:var(--shadow-sm);transition:transform .25s,box-shadow .25s,border-color .25s;
}
.art-pn-grid a:hover{transform:translateY(-3px);box-shadow:var(--shadow-md);border-color:var(--brand-soft)}
.art-pn-grid a .dir{font-size:12px;font-weight:700;color:var(--ink-3);display:flex;align-items:center;gap:6px}
.art-pn-grid a .dir svg{width:13px;height:13px}
.art-pn-grid a.next{text-align:right}
.art-pn-grid a.next .dir{justify-content:flex-end}
.art-pn-grid a .nm{font-family:'Unbounded',sans-serif;font-weight:700;font-size:17px;margin-top:8px;line-height:1.2}
@media(max-width:560px){.art-pn-grid{grid-template-columns:1fr}.art-pn-grid a.next{text-align:left}.art-pn-grid a.next .dir{justify-content:flex-start}}

/* trainer CTA inset */
.train-cta{
  background:linear-gradient(160deg,var(--sec) 0%,#2F4E5E 100%);border-radius:24px;
  padding:30px 34px;display:grid;grid-template-columns:1fr auto;gap:24px;align-items:center;
  color:#fff;position:relative;overflow:hidden;box-shadow:var(--shadow-md);
}
.train-cta::before{content:"";position:absolute;inset:auto -10% -60% auto;width:340px;height:340px;background:radial-gradient(circle,rgba(223,153,91,.4),transparent 70%);pointer-events:none}
.train-cta .tx{position:relative;z-index:1}
.train-cta h3{font-size:23px;color:#fff;line-height:1.15}
.train-cta p{color:rgba(255,255,255,.8);font-size:15px;margin-top:10px;line-height:1.5;max-width:440px}
.train-cta .btn-primary{margin-top:18px;background:var(--brand);color:#fff}
.train-cta .mascot{position:relative;z-index:1;width:130px}
@media(max-width:600px){.train-cta{grid-template-columns:1fr;text-align:center}.train-cta .mascot{display:none}}

@media(max-width:980px){
  .art-body .wrap{grid-template-columns:1fr}
  .art-side{position:fixed;top:0;left:0;bottom:0;width:300px;max-width:86vw;z-index:120;transform:translateX(-100%);transition:transform .35s cubic-bezier(.22,1,.36,1);padding:18px}
  .art-side.open{transform:none}
  .art-side-inner{height:100%;overflow-y:auto;border-radius:18px}
  .art-side-backdrop{display:block;position:fixed;inset:0;background:rgba(31,20,8,.4);opacity:0;visibility:hidden;z-index:110;transition:opacity .3s}
  .art-side-backdrop.open{opacity:1;visibility:visible}
  .art-side-toggle{
    display:inline-flex;align-items:center;gap:9px;position:sticky;top:74px;z-index:40;
    margin-bottom:20px;padding:12px 18px;border-radius:14px;background:var(--surface);
    border:1px solid var(--line);box-shadow:var(--shadow-sm);font-weight:700;font-size:14px;color:var(--ink);cursor:pointer;
  }
  .art-side-toggle svg{width:18px;height:18px}
}
.card{padding:28px 30px}
@media(max-width:560px){.card{padding:22px 20px}.art-header .meta .m{font-size:12px}}

/* ============ shared header base (нужно header.js, т.к. styles.css на этих страницах не подключён) ============ */
.nav{position:fixed;inset:14px 14px auto 14px;z-index:50;display:flex;align-items:center;justify-content:space-between;padding:10px 14px 10px 18px;background:transparent;border:1px solid transparent;border-radius:999px;transition:all .35s cubic-bezier(.22,1,.36,1)}
.nav.scrolled{inset:10px max(14px,calc(50vw - 620px)) auto max(14px,calc(50vw - 620px));background:rgba(255,253,248,.82);border-color:var(--line);backdrop-filter:saturate(1.2) blur(14px);-webkit-backdrop-filter:saturate(1.2) blur(14px);box-shadow:var(--shadow-sm)}
.brand{display:flex;align-items:center;gap:10px;font-family:'Unbounded',sans-serif;font-weight:700;font-size:17px;white-space:nowrap}
.brand-mark{width:42px;height:42px;border-radius:13px;background:linear-gradient(160deg,#FFE6C5,#F3B880);display:grid;place-items:center;box-shadow:inset 0 -2px 0 rgba(0,0,0,.06),0 4px 12px rgba(223,153,91,.35);overflow:hidden;flex-shrink:0}
.brand-mark img{width:34px;height:34px;object-fit:contain}
.nav-cta{display:inline-flex;align-items:center;gap:9px;padding:11px 18px 11px 14px;border-radius:999px;background:var(--brand);color:#fff;font-weight:700;font-size:14px;box-shadow:0 6px 18px -4px rgba(223,153,91,.55),inset 0 -2px 0 rgba(0,0,0,.12);transition:transform .2s ease,box-shadow .2s ease;white-space:nowrap;border:none;cursor:pointer}
.nav-cta:hover{transform:translateY(-1px);box-shadow:0 10px 24px -6px rgba(223,153,91,.7),inset 0 -2px 0 rgba(0,0,0,.12)}
.nav-cta .dot{width:8px;height:8px;border-radius:50%;background:#fff;animation:ping 2s infinite}
@keyframes ping{0%{box-shadow:0 0 0 0 rgba(255,255,255,.75)}70%{box-shadow:0 0 0 10px rgba(255,255,255,0)}100%{box-shadow:0 0 0 0 rgba(255,255,255,0)}}
@media(max-width:760px){.nav{inset:10px 10px auto 10px}}