@font-face{font-family:'Unbounded';font-style:normal;font-weight:500;font-display:swap;src:url(/assets/fonts/unbounded-cyrillic-500-normal.woff2) format('woff2');unicode-range:U+0301,U+0400-045F,U+0490-0491,U+04B0-04B1,U+2116}
@font-face{font-family:'Unbounded';font-style:normal;font-weight:500;font-display:swap;src:url(/assets/fonts/unbounded-latin-500-normal.woff2) format('woff2');unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:'Unbounded';font-style:normal;font-weight:700;font-display:swap;src:url(/assets/fonts/unbounded-cyrillic-700-normal.woff2) format('woff2');unicode-range:U+0301,U+0400-045F,U+0490-0491,U+04B0-04B1,U+2116}
@font-face{font-family:'Unbounded';font-style:normal;font-weight:700;font-display:swap;src:url(/assets/fonts/unbounded-latin-700-normal.woff2) format('woff2');unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:'Onest';font-style:normal;font-weight:400;font-display:swap;src:url(/assets/fonts/onest-cyrillic-400-normal.woff2) format('woff2');unicode-range:U+0301,U+0400-045F,U+0490-0491,U+04B0-04B1,U+2116}
@font-face{font-family:'Onest';font-style:normal;font-weight:400;font-display:swap;src:url(/assets/fonts/onest-latin-400-normal.woff2) format('woff2');unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:'Onest';font-style:normal;font-weight:500;font-display:swap;src:url(/assets/fonts/onest-cyrillic-500-normal.woff2) format('woff2');unicode-range:U+0301,U+0400-045F,U+0490-0491,U+04B0-04B1,U+2116}
@font-face{font-family:'Onest';font-style:normal;font-weight:500;font-display:swap;src:url(/assets/fonts/onest-latin-500-normal.woff2) format('woff2');unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:'Onest';font-style:normal;font-weight:600;font-display:swap;src:url(/assets/fonts/onest-cyrillic-600-normal.woff2) format('woff2');unicode-range:U+0301,U+0400-045F,U+0490-0491,U+04B0-04B1,U+2116}
@font-face{font-family:'Onest';font-style:normal;font-weight:600;font-display:swap;src:url(/assets/fonts/onest-latin-600-normal.woff2) format('woff2');unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:'Onest';font-style:normal;font-weight:700;font-display:swap;src:url(/assets/fonts/onest-cyrillic-700-normal.woff2) format('woff2');unicode-range:U+0301,U+0400-045F,U+0490-0491,U+04B0-04B1,U+2116}
@font-face{font-family:'Onest';font-style:normal;font-weight:700;font-display:swap;src:url(/assets/fonts/onest-latin-700-normal.woff2) format('woff2');unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:'JetBrains Mono';font-style:normal;font-weight:400;font-display:swap;src:url(/assets/fonts/jetbrains-mono-cyrillic-400-normal.woff2) format('woff2');unicode-range:U+0301,U+0400-045F,U+0490-0491,U+04B0-04B1,U+2116}
@font-face{font-family:'JetBrains Mono';font-style:normal;font-weight:400;font-display:swap;src:url(/assets/fonts/jetbrains-mono-latin-400-normal.woff2) format('woff2');unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:'JetBrains Mono';font-style:normal;font-weight:600;font-display:swap;src:url(/assets/fonts/jetbrains-mono-cyrillic-600-normal.woff2) format('woff2');unicode-range:U+0301,U+0400-045F,U+0490-0491,U+04B0-04B1,U+2116}
@font-face{font-family:'JetBrains Mono';font-style:normal;font-weight:600;font-display:swap;src:url(/assets/fonts/jetbrains-mono-latin-600-normal.woff2) format('woff2');unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
/* Excel-тренажёр. Токены — общие для сайта и тренажёра (trainer.css берёт --paper, --sheet, --ink, --accent…). */
:root{
  --paper:#f7f9f6; --sheet:#ffffff; --ink:#17231c; --muted:#5b6a61; --line:#dce3dd; --head:#eef2ee; --head-ink:#4d5b53;
  --accent:#1c7a45; --accent-2:#13603a; --accent-soft:#e2f2e8; --on-accent:#ffffff;
  --bad:#b8402b; --bad-soft:#fbe9e5; --target:#e8a400; --target-soft:#fff6dc; --sel:#1c7a45;
  --r1:#2f6fdb; --r2:#d2453b; --r3:#8b4fd2; --r4:#0e8a83;
  --display:"Unbounded","Onest",system-ui,sans-serif; --body:"Onest",system-ui,-apple-system,"Segoe UI",sans-serif; --mono:"JetBrains Mono",ui-monospace,"Cascadia Mono",Consolas,monospace;
  --r:12px; --shadow:0 1px 2px rgba(20,40,28,.06),0 6px 22px rgba(20,40,28,.07);
  --top-bg:rgba(247,249,246,.92); --callout:#fff8e3; --callout-line:#e8a400;
  color-scheme:light;
}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){
  --paper:#101612; --sheet:#151d18; --ink:#e6eee8; --muted:#9aa9a0; --line:#2a352e; --head:#1b241f; --head-ink:#a8b6ad;
  --accent:#46b878; --accent-2:#5fcb8d; --accent-soft:#183a27; --on-accent:#08130c;
  --bad:#f07a62; --bad-soft:#3a1d17; --target:#f2bd3a; --target-soft:#3a3012; --sel:#46b878;
  --r1:#6f9df0; --r2:#f07a6f; --r3:#b58af0; --r4:#3fc2b9; --shadow:0 1px 2px rgba(0,0,0,.3),0 8px 24px rgba(0,0,0,.25);
  --top-bg:rgba(16,22,18,.9); --callout:#2a2511; --callout-line:#b8901f; color-scheme:dark}}
:root[data-theme="dark"]{
  --paper:#101612; --sheet:#151d18; --ink:#e6eee8; --muted:#9aa9a0; --line:#2a352e; --head:#1b241f; --head-ink:#a8b6ad;
  --accent:#46b878; --accent-2:#5fcb8d; --accent-soft:#183a27; --on-accent:#08130c;
  --bad:#f07a62; --bad-soft:#3a1d17; --target:#f2bd3a; --target-soft:#3a3012; --sel:#46b878;
  --r1:#6f9df0; --r2:#f07a6f; --r3:#b58af0; --r4:#3fc2b9; --shadow:0 1px 2px rgba(0,0,0,.3),0 8px 24px rgba(0,0,0,.25);
  --top-bg:rgba(16,22,18,.9); --callout:#2a2511; --callout-line:#b8901f; color-scheme:dark}

*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-padding-top:76px}
html,body{background:var(--paper)}
body{margin:0;color:var(--ink);font:400 17px/1.6 var(--body);-webkit-font-smoothing:antialiased;overflow-x:hidden}
[hidden]{display:none!important}
a{color:var(--accent)}a:hover{color:var(--accent-2)}
img,svg{max-width:100%}
code,kbd{font-family:var(--mono);font-size:.86em}
code{background:var(--head);padding:.08em .35em;border-radius:5px;overflow-wrap:anywhere}
kbd{border:1px solid var(--line);border-bottom-width:2px;border-radius:5px;padding:0 .35em;background:var(--sheet)}
button{font:inherit;color:inherit;cursor:pointer}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.wrap{max-width:1180px;margin:0 auto;padding-left:max(16px,env(safe-area-inset-left,0px));padding-right:max(16px,env(safe-area-inset-right,0px))}
.narrow{max-width:800px}
.pad{padding-bottom:30px}
.vh{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.skip{position:absolute;left:-9999px}.skip:focus{left:12px;top:12px;z-index:99;background:var(--sheet);padding:8px 12px;border-radius:8px}
h1,h2,h3{margin:0;line-height:1.2;text-wrap:balance}
h1{font:700 clamp(27px,4vw,44px)/1.12 var(--display);letter-spacing:-.025em}
h2{font:700 clamp(21px,2.4vw,26px)/1.22 var(--display);letter-spacing:-.015em;margin:0 0 14px}
h3{font:600 18px/1.3 var(--body)}
.h3{font:600 17px/1.3 var(--body);margin:0 0 10px}
.kick{font:600 12.5px/1.2 var(--body);text-transform:uppercase;letter-spacing:.08em;color:var(--accent);margin:0 0 10px}
.lead{font-size:19px;line-height:1.55;color:var(--muted);max-width:44em;margin:14px 0 0}
.note{font-size:14.5px;color:var(--muted)}

/* кнопки, чипы */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:46px;padding:0 20px;border-radius:12px;border:0;font-weight:600;font-size:16px;line-height:1.2;text-decoration:none;transition:transform .08s;text-align:center}
.btn:active{transform:translateY(1px)}
.btn.main{background:var(--accent);color:var(--on-accent);box-shadow:inset 0 -3px 0 rgba(0,0,0,.2)}
.btn.main:hover{background:var(--accent-2);color:var(--on-accent)}
.btn.ghost{background:var(--sheet);color:var(--ink);border:1px solid var(--line)}
.btn.ghost:hover{border-color:var(--muted);color:var(--ink)}
.chips{display:flex;flex-wrap:wrap;gap:8px;margin:8px 0 18px}
.chip{border:1px solid var(--line);background:var(--sheet);border-radius:999px;padding:7px 14px;font:500 15px/1.2 var(--body);color:var(--ink);text-decoration:none}
.chip:hover{border-color:var(--accent);color:var(--accent)}
.tg{display:inline-block;font:600 11.5px/1 var(--body);letter-spacing:.02em;color:var(--accent-2);background:var(--accent-soft);border-radius:99px;padding:4px 8px;margin-left:8px;vertical-align:2px;font-style:normal;white-space:nowrap}

/* шапка */
.top{position:sticky;top:0;z-index:30;background:var(--top-bg);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.top-in{display:flex;align-items:center;gap:14px;min-height:60px}
.logo{display:flex;align-items:center;gap:9px;text-decoration:none;color:var(--ink);font:700 17px/1 var(--display);letter-spacing:-.01em;white-space:nowrap;flex:none}
.logo:hover{color:var(--ink)}
.logo i{display:grid;place-items:center;width:30px;height:30px;border-radius:7px;background:var(--accent);color:var(--on-accent);font:600 12px/1 var(--mono);font-style:italic;box-shadow:inset 0 -3px 0 rgba(0,0,0,.18);flex:none}
.nav{display:flex;align-items:center;gap:2px;margin-left:10px}
.nav>a,.dd-t{display:block;white-space:nowrap;padding:7px 12px;border-radius:9px;color:var(--muted);text-decoration:none;font-weight:500;font-size:15.5px}
.nav>a:hover,.dd-t:hover,.dd:focus-within .dd-t,.nav>a[aria-current]{background:var(--head);color:var(--ink)}
.dd{position:relative}
.dd-t::after{content:"";display:inline-block;width:6px;height:6px;border:solid currentColor;border-width:0 1.6px 1.6px 0;transform:rotate(45deg);margin:0 0 3px 8px;opacity:.7}
.dd-p{position:absolute;left:-8px;top:100%;padding-top:6px;display:none;z-index:40}
.dd-box{background:var(--sheet);border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow);padding:8px}
.dd-box ul{list-style:none;margin:0;padding:0;min-width:250px}
.dd-box>ul{columns:2;column-gap:4px;width:max-content;max-width:min(560px,calc(100vw - 40px))}
.dd-2{display:grid;grid-template-columns:repeat(2,minmax(220px,1fr));gap:8px;padding-top:12px}
.dd-box b{display:block;font:600 12px/1.2 var(--body);text-transform:uppercase;letter-spacing:.07em;color:var(--muted);padding:2px 10px 8px}
.dd-box a{display:block;padding:7px 10px;border-radius:8px;color:var(--ink);text-decoration:none;font-size:15px;line-height:1.3;break-inside:avoid}
.dd-box a:hover{background:var(--accent-soft);color:var(--accent-2)}
@media (hover:hover) and (min-width:961px){.dd:hover .dd-p,.dd:focus-within .dd-p{display:block}}
.dd.open .dd-p{display:block}
.stats{margin-left:auto;display:flex;gap:8px;flex:none}
.pill{display:flex;align-items:center;gap:5px;padding:4px 10px;border-radius:99px;background:var(--sheet);border:1px solid var(--line);font:600 14px/1.4 var(--body);font-variant-numeric:tabular-nums;white-space:nowrap}
.pill svg{width:15px;height:15px;flex:none}
.burger{display:none;flex-direction:column;justify-content:center;align-items:center;gap:4px;width:42px;height:42px;border:1px solid var(--line);background:var(--sheet);border-radius:11px;flex:none}
.burger i{display:block;width:18px;height:2px;background:var(--ink);border-radius:2px}
@media (max-width:960px){
  .burger{display:flex}
  .nav{display:none;position:absolute;left:0;right:0;top:100%;margin:0;flex-direction:column;align-items:stretch;gap:2px;background:var(--sheet);border-bottom:1px solid var(--line);box-shadow:var(--shadow);padding:10px max(16px,env(safe-area-inset-left,0px)) 16px;max-height:calc(100vh - 61px);overflow-y:auto}
  .nav.open{display:flex}
  .nav>a,.dd-t{font-size:17px;padding:11px 12px;color:var(--ink)}
  .dd-t{display:flex;justify-content:space-between;align-items:center}
  .dd-p{position:static;padding:0 0 6px}
  .dd-box{border:0;box-shadow:none;background:none;padding:0 0 0 8px}
  .dd-box>ul{columns:1;width:auto;max-width:none}
  .dd-box ul{min-width:0}
  .dd-2{grid-template-columns:1fr;gap:6px;padding-top:4px}
  .dd.open .dd-t::after{transform:rotate(-135deg);margin-bottom:-2px}
}
@media (max-width:480px){.logo span{display:none}.pill .lbl{display:none}.pill{padding:4px 8px}.top-in{gap:8px}}

/* главная */
.hero{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,1fr);gap:44px;align-items:center;padding-top:44px;padding-bottom:28px}
.hero h1{font-size:clamp(30px,4.5vw,48px);line-height:1.08;margin:0 0 16px}
.hero h1 em{font-style:normal;color:var(--accent)}
.hero .sub{color:var(--muted);font-size:18px;max-width:34em;margin:0 0 24px}
.cta{display:flex;gap:10px;flex-wrap:wrap}
.demo{background:var(--sheet);border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow);overflow:hidden;font-size:14.5px}
.demo .df{display:flex;gap:8px;align-items:center;padding:9px 12px;border-bottom:1px solid var(--line);font-family:var(--mono);font-size:13px;overflow:hidden;white-space:nowrap}
.demo .df b{color:var(--muted);font-weight:600;font-style:italic}
.demo table{border-collapse:collapse;width:100%;font-variant-numeric:tabular-nums}
.demo td{border:1px solid var(--line);padding:5px 9px;height:32px}
.demo td.h{background:var(--head);color:var(--head-ink);font-weight:600}
.demo td.n{text-align:right;width:34%}
.demo td.t{outline:2px solid var(--accent);outline-offset:-2px;background:var(--accent-soft);font-weight:600}
.demo .ok{display:flex;gap:8px;align-items:center;padding:10px 12px;background:var(--accent-soft);color:var(--accent-2);font-weight:600}
.how{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;padding-bottom:20px}
.how div{padding:16px 18px;border-radius:var(--r);background:var(--sheet);border:1px solid var(--line)}
.how b{display:block;font:500 15px/1.3 var(--display);margin-bottom:6px}
.how p{margin:0;color:var(--muted);font-size:15.5px;line-height:1.5}
.course{padding-top:26px;padding-bottom:20px}
.course>p{color:var(--muted);margin:0 0 20px;max-width:46em}
.path{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
.unit{background:var(--sheet);border:1px solid var(--line);border-radius:14px;padding:16px}
.unit h3{margin:0 0 10px;font:600 12.5px/1.2 var(--body);text-transform:uppercase;letter-spacing:.08em;color:var(--muted)}
.unit ol{list-style:none;margin:0;padding:0;display:grid;gap:4px}
.nbtn{display:grid;grid-template-columns:38px minmax(0,1fr);grid-template-rows:auto auto;column-gap:11px;align-items:center;padding:8px;border-radius:10px;border:1px solid transparent;text-decoration:none;color:var(--ink)}
.nbtn:hover{color:var(--ink);background:var(--head)}
.nbtn .dot{grid-row:1/3;display:grid;place-items:center;width:38px;height:38px;border-radius:50%;background:var(--head);color:var(--muted);font:600 13px/1 var(--mono)}
.nbtn .nm{font-weight:600;font-size:15.5px;line-height:1.25}
.nbtn .st{font-size:13px;color:var(--muted);line-height:1.35}
.node.open .nbtn{border-color:color-mix(in srgb,var(--accent) 45%,transparent);background:var(--accent-soft)}
.node.open .dot{background:var(--accent);color:var(--on-accent);font-style:italic;box-shadow:0 0 0 4px color-mix(in srgb,var(--accent) 20%,transparent)}
.node.open .nbtn:hover{background:color-mix(in srgb,var(--accent-soft) 70%,var(--accent) 14%)}
.node.done .dot{font-style:normal}
.node.art .nm{font-weight:500}
.sec{padding-top:34px;padding-bottom:10px}
.groups{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}
.grp{background:var(--sheet);border:1px solid var(--line);border-radius:14px;padding:16px 18px}
.grp h3{font:500 15px/1.3 var(--display);margin:0 0 10px}
.grp ul{list-style:none;margin:0;padding:0}
.grp li{padding:5px 0;border-top:1px dashed var(--line);font-size:15.5px;line-height:1.35}
.grp li:first-child{border-top:0}
.grp a{color:var(--ink);text-decoration:none}.grp a:hover{color:var(--accent)}
.home-text{padding-top:30px}
@media (max-width:1060px){.groups{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:980px){.path{grid-template-columns:repeat(2,minmax(0,1fr))}.hero{grid-template-columns:1fr;gap:26px;padding-top:28px}}
@media (max-width:620px){.path,.how,.groups{grid-template-columns:1fr}.hero .sub{font-size:16.5px}.cta .btn{flex:1 1 220px}}

/* страница темы */
.crumbs{font-size:14px;color:var(--muted);padding:16px 0 0}
.crumbs ol{list-style:none;display:flex;flex-wrap:wrap;gap:4px 6px;padding:0;margin:0}
.crumbs li+li::before{content:"›";margin-right:6px;color:var(--muted)}
.crumbs a{color:var(--muted)}
.pg-h{padding:14px 0 22px;max-width:900px}
.pg-h-s{padding-bottom:16px}
.pg-meta{margin:14px 0 0;font-size:15px}
.pg-meta a{display:inline-flex;align-items:center;gap:8px;font-weight:600;text-decoration:none}
.pg-meta a::before{content:"fx";display:grid;place-items:center;width:24px;height:24px;border-radius:6px;background:var(--accent);color:var(--on-accent);font:italic 600 10px/1 var(--mono)}
.upd{font-size:13.5px;color:var(--muted);margin:10px 0 0}
.tool{margin:0 0 26px;scroll-margin-top:76px}
.tool [data-xt]{scroll-margin-top:76px}
.xt-full{min-height:300px}
.fnlist{margin:10px 0 0;max-width:62em}
.art-g{display:grid;grid-template-columns:minmax(0,1fr) 250px;gap:40px;align-items:start}
.art-g.art-1{grid-template-columns:minmax(0,1fr)}
.art-side{grid-column:2;grid-row:1;position:sticky;top:80px}
.art-main{grid-column:1;grid-row:1;min-width:0;max-width:800px}
.toc{background:var(--sheet);border:1px solid var(--line);border-radius:14px;padding:14px 16px}
.toc .h3{font-size:13px;text-transform:uppercase;letter-spacing:.07em;color:var(--muted);margin-bottom:8px}
.toc ol{margin:0;padding-left:20px;font-size:14.5px;line-height:1.4}
.toc li{margin:6px 0}.toc li::marker{color:var(--muted)}
.toc a{color:var(--ink);text-decoration:none}.toc a:hover{color:var(--accent)}
@media (max-width:1060px){.art-g{grid-template-columns:minmax(0,1fr);gap:0}.art-side{grid-column:1;grid-row:auto;position:static;margin-bottom:24px;max-width:800px}.art-main{grid-row:auto}}
.prose{font-size:17px}
.prose>:first-child{margin-top:0}
.prose h2{margin:38px 0 12px;scroll-margin-top:76px}
.prose h3{margin:26px 0 8px}
.prose p{margin:0 0 14px}
.prose ul,.prose ol{padding-left:24px;margin:0 0 14px}.prose li{margin:5px 0}
.prose li::marker{color:var(--muted)}
.prose img{height:auto;border-radius:10px}
.callout{margin:18px 0;padding:13px 16px;border-left:4px solid var(--callout-line);background:var(--callout);border-radius:0 12px 12px 0;font-size:16px}
.tw{overflow-x:auto;margin:16px 0 18px;border:1px solid var(--line);border-radius:12px;background:var(--sheet);-webkit-overflow-scrolling:touch}
.tb{border-collapse:collapse;width:100%;font-size:15.5px;line-height:1.45}
.tb th,.tb td{text-align:left;padding:9px 12px;border-bottom:1px solid var(--line);vertical-align:top}
.tb tr:last-child td{border-bottom:0}
.tb th{background:var(--head);color:var(--head-ink);font-weight:600;white-space:nowrap}
.tb code{white-space:nowrap}
pre.code{background:var(--sheet);border:1px solid var(--line);border-radius:12px;padding:12px 14px;overflow-x:auto;font:14px/1.5 var(--mono);margin:0 0 16px}
pre.code code{background:none;padding:0;white-space:pre}
.xt-inline{margin:18px 0 22px}
.blk{margin:34px 0}
.faq details{background:var(--sheet);border:1px solid var(--line);border-radius:12px;padding:0;margin-bottom:10px}
.faq summary{cursor:pointer;font-weight:600;padding:14px 44px 14px 18px;position:relative;list-style:none}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";position:absolute;right:18px;top:11px;font:400 22px/1 var(--body);color:var(--muted)}
.faq details[open] summary::after{content:"−"}
.faq details p{margin:0;padding:0 18px 16px;color:var(--ink)}
.srcs{margin:30px 0 0}
.src{list-style:none;padding:0;margin:0;font-size:14.5px}.src li{margin:5px 0}.src a{color:var(--muted);overflow-wrap:anywhere}
.sim{margin-top:40px;padding-top:6px}
.cards{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
.card{display:flex;flex-direction:column;gap:6px;background:var(--sheet);border:1px solid var(--line);border-radius:14px;padding:16px 18px;text-decoration:none;color:var(--ink);transition:border-color .15s,transform .15s}
.card:hover{border-color:var(--accent);color:var(--ink);transform:translateY(-1px)}
.card b{font:500 16px/1.3 var(--display)}
.card span{color:var(--muted);font-size:14.5px;line-height:1.45}
.card .tg{align-self:flex-start;margin:4px 0 0}
@media (max-width:900px){.cards{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:560px){.cards{grid-template-columns:1fr}.lead{font-size:17.5px}.prose{font-size:16.5px}}
.more{margin:6px 0 30px}
.contact{margin:20px 0;font-weight:500}

/* 404 */
.find-big{margin:20px 0 14px}
.find-big input{width:100%;border:1.5px solid var(--line);background:var(--sheet);color:var(--ink);border-radius:12px;padding:13px 16px;font:400 17px var(--body)}
.find-big input:focus{outline:none;border-color:var(--accent)}
.res{list-style:none;padding:0;margin:18px 0;display:grid;gap:6px}
.res li a{display:inline}
.res li{display:flex;justify-content:space-between;gap:12px;background:var(--sheet);border:1px solid var(--line);border-radius:10px;padding:10px 14px}
.res li span{color:var(--muted);font-size:13.5px;text-align:right}
.res a{color:var(--ink);text-decoration:none;font-weight:500}.res a:hover{color:var(--accent)}

/* реклама */
.ad{margin:22px 0;text-align:center}.ad.ad-on{min-height:90px}.ad img{max-width:100%;height:auto;border-radius:12px;display:block;margin:0 auto}.ad a{display:inline-block}.ad-mark{display:block;margin-top:4px;font-size:12px;color:var(--muted);text-align:left}

/* подвал */
.foot{margin-top:60px;border-top:1px solid var(--line);padding:34px 0 40px;font-size:14.5px;color:var(--muted);background:var(--sheet)}
.foot-g{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:24px}
.foot b{display:block;color:var(--ink);margin-bottom:8px;font-size:14px}
.foot ul{list-style:none;padding:0;margin:0}
.foot li a{display:block;padding:3px 0;color:var(--muted);text-decoration:none;line-height:1.35}.foot li a:hover{color:var(--accent)}
.foot-x{display:flex;align-items:center;gap:16px;margin-top:28px;padding-top:20px;border-top:1px solid var(--line)}
.foot-x p{margin:0;font-size:13.5px}
.logo-s{font-size:15px}
@media (max-width:1000px){.foot-g{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:520px){.foot-g{grid-template-columns:1fr}.foot-x{flex-direction:column;align-items:flex-start}}
@media print{.top,.foot,.ad,.tool,.art-side{display:none!important}body{background:#fff;color:#000}}
@media (prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}}
h1,h2{overflow-wrap:break-word;hyphens:auto;-webkit-hyphens:auto}
@media (max-width:420px){h1{font-size:25px}.hero h1{font-size:29px}}

/* карта курса: заголовок раздела — кнопка (сворачивание только на телефоне) */
.unit h3{margin:0 0 10px}
.unit-t{all:unset;display:flex;width:100%;justify-content:space-between;align-items:baseline;gap:10px;font:600 12.5px/1.2 var(--body);text-transform:uppercase;letter-spacing:.08em;color:var(--muted);cursor:default}
.unit-n{font:500 12.5px/1.2 var(--body);text-transform:none;letter-spacing:0;color:var(--muted);white-space:nowrap}
.unit-n.all{color:var(--accent)}
@media (max-width:620px){
  .path{gap:8px}
  .unit{padding:0}
  .unit h3{margin:0}
  .unit-t{cursor:pointer;padding:15px 16px;box-sizing:border-box;font-size:13px}
  .unit-t:focus-visible{outline:2px solid var(--accent);outline-offset:-2px;border-radius:14px}
  .unit-t::after{content:"";width:7px;height:7px;border:solid var(--muted);border-width:0 1.6px 1.6px 0;transform:rotate(45deg);margin:0 2px 2px 4px;flex:none;align-self:center}
  .unit-t span{flex:1}
  .unit.open .unit-t::after{transform:rotate(-135deg);margin-bottom:-3px}
  .unit:not(.open) ol{display:none}
  .unit ol{padding:0 8px 10px}
}
/* широкая таблица в тексте: тень у края, пока есть что прокрутить */
.tw-w{position:relative;margin:16px 0 18px}
.tw-w>.tw{margin:0}
.tw-w::before,.tw-w::after{content:"";position:absolute;top:1px;bottom:1px;width:34px;pointer-events:none;opacity:0;transition:opacity .15s;z-index:1}
.tw-w::after{right:1px;border-radius:0 11px 11px 0;background:linear-gradient(to left,color-mix(in srgb,var(--ink) 16%,transparent),transparent)}
.tw-w::before{left:1px;border-radius:11px 0 0 11px;background:linear-gradient(to right,color-mix(in srgb,var(--ink) 16%,transparent),transparent)}
.tw-w.can-r::after,.tw-w.can-l::before{opacity:1}
.tw-hint{font-size:13px;color:var(--muted);margin:-10px 2px 18px}
.lead,.prose p,.prose li,.faq,.callout{overflow-wrap:anywhere}.prose{min-width:0}.prose table:not(.tb){display:block;overflow-x:auto;max-width:100%}
/* формат v23: автор и даты, ключевые факты, сноски, источники, вопросы-H3 */
.byline{font-size:13.5px;color:var(--muted);margin:12px 0 0}
.byline a{color:inherit}
.prose ul.kf{border-left:3px solid var(--accent);padding:4px 0 4px 22px;margin:6px 0 24px}
.prose ul.kf li{margin:7px 0}
sup.fn{font-size:.72em;line-height:0}
sup.fn a{text-decoration:none;padding:0 1px}
.src-n li{display:flex;gap:6px}
.src-n .fn-n{color:var(--muted);flex:none}
.src li:target{background:var(--soft,rgba(127,127,127,.12));border-radius:4px}
.faq summary h3.faq-q{display:inline;font:inherit;margin:0}