/* informatik.kz — тема. Один файл, без фреймворков. Палитра: бумага, чернила, красная ручка; цвет группы предметов — --g. */
@font-face{font-family:"Noto Sans";src:url(fonts/noto-sans-400.woff2) format("woff2");font-weight:400;font-style:normal;font-display:swap}
@font-face{font-family:"Noto Sans";src:url(fonts/noto-sans-400i.woff2) format("woff2");font-weight:400;font-style:italic;font-display:swap}
@font-face{font-family:"Noto Sans";src:url(fonts/noto-sans-700.woff2) format("woff2");font-weight:600 800;font-style:normal;font-display:swap}
@font-face{font-family:"Noto Serif Display";src:url(fonts/noto-serif-display-700.woff2) format("woff2");font-weight:700;font-style:normal;font-display:swap}

:root{
  color-scheme:light;
  --paper:#fcfaf6;--paper2:#f6f3ec;--paper3:#efebe1;--card:#fff;
  --line:#ddd9cf;--line2:#c4bdb0;
  --ink:#20202d;--ink2:#515160;--ink3:#6a6a77;
  --acc:#4841af;--acc-d:#352a90;--acc-bg:#eaedff;
  --red:#c22826;--red-bg:#ffeae7;--ok:#00706c;
  --grid:rgba(72,110,170,.16);--margin:rgba(194,40,38,.42);
  --g:#4841af;--g-bg:#eaedff;
  --sans:"Noto Sans",system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;
  --serif:"Noto Serif Display",Georgia,"Times New Roman",serif;
  /* скругления — только три: --r (кнопки, поля, плитки, строки списков, картинки), --r2 (карточки и блоки), 999px (пилюли, точки) */
  --r:10px;--r2:14px;--gut:16px;
  --ease:cubic-bezier(.23,1,.32,1);
  --shadow:0 6px 18px -10px rgba(32,32,45,.28);
}
.g-lang{--g:#2c56a8;--g-bg:#e4efff}
.g-stem{--g:#00706c;--g-bg:#d9f5f3}
.g-society{--g:#8f520d;--g-bg:#fdecd5}
.g-arts{--g:#a13170;--g-bg:#ffe7f1}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%}
body{margin:0;background:var(--paper);color:var(--ink);font:400 1rem/1.55 var(--sans);overflow-wrap:break-word;-webkit-font-smoothing:antialiased}
img,svg,video,iframe{max-width:100%}
img{height:auto}
a{color:var(--acc);text-decoration-thickness:1px;text-underline-offset:.18em}
a:hover{color:var(--acc-d)}
button,input{font:inherit;color:inherit}
:focus-visible{outline:3px solid var(--acc);outline-offset:2px;border-radius:var(--r)}
main:focus{outline:none}
[hidden]{display:none!important}
.vh{position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}
.skip{position:absolute;left:8px;top:-80px;z-index:60;padding:10px 16px;border-radius:var(--r);background:var(--ink);color:#fff;font-weight:700;text-decoration:none}
.skip:focus{top:8px;color:#fff}
.wrap{max-width:1200px;margin:0 auto;padding-left:var(--gut);padding-right:var(--gut)}
.i{width:1.25em;height:1.25em;flex:none;vertical-align:-.25em}
h1,h2,h3{text-wrap:balance}

/* ---------- шапка ---------- */
.site-header{position:relative;z-index:30;background:var(--paper);border-bottom:1px solid var(--line)}
.header-bar{display:grid;grid-template-columns:minmax(0,1fr) auto;align-items:center;column-gap:12px}
.brand{display:inline-flex;align-items:center;gap:10px;padding:10px 0;color:var(--ink);text-decoration:none;justify-self:start}
.brand:hover{color:var(--ink)}
.brand-mark{width:34px;height:34px;color:var(--acc)}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-name{font-weight:700;font-size:1.0625rem;letter-spacing:-.01em}
.brand-sub{font-size:.8125rem;color:var(--ink2)}
.search-toggle{display:inline-grid;place-items:center;width:44px;height:44px;border-radius:var(--r);color:var(--ink)}
.search-toggle[aria-expanded="true"]{background:var(--acc-bg);color:var(--acc-d)}
.nav{grid-column:1/-1;margin:0 calc(var(--gut)*-1)}
.nav-list{display:flex;flex-wrap:wrap;gap:6px;margin:0;padding:2px var(--gut) 10px;list-style:none}
.nav-item{flex:none}
.nav-link{display:inline-flex;align-items:center;gap:4px;min-height:40px;padding:0 14px;border-radius:999px;background:var(--paper2);color:var(--ink);font-weight:700;font-size:.9375rem;white-space:nowrap;text-decoration:none;cursor:pointer;list-style:none;-webkit-user-select:none;user-select:none;transition:background-color .15s}
summary.nav-link::-webkit-details-marker{display:none}
.nav-link[aria-current]{background:var(--acc-bg);color:var(--acc-d)}
.nav-dd[open]>.nav-link{background:var(--ink);color:#fff}
.nav-chev{width:1em;height:1em;transition:transform .2s var(--ease)}
.nav-dd[open] .nav-chev{transform:rotate(180deg)}
.nav-panel{position:absolute;left:0;right:0;top:100%;max-height:calc(100vh - 130px);overflow-y:auto;overscroll-behavior:contain;padding:18px 0 22px;background:var(--paper);border-bottom:1px solid var(--line);box-shadow:0 22px 30px -22px rgba(32,32,45,.35)}
.nav-dd[open] .nav-panel{animation:dd .18s var(--ease)}
@keyframes dd{from{opacity:0;transform:translateY(-6px)}}
.nav-panel-head{display:none}
.nav-panel-t{margin:0;font:700 1.25rem/1.2 var(--serif)}
.nav-close{display:inline-grid;place-items:center;width:44px;height:44px;margin-right:-6px;padding:0;border:0;border-radius:999px;background:var(--paper2);color:var(--ink);cursor:pointer}
.nav-close .i{width:22px;height:22px}
.nav-groups{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:18px 28px}
/* заголовок группы в две строки не сдвигает список: строки заголовков общие для ряда групп (subgrid; без него — как раньше) */
.nav-group{display:grid;grid-row:span 2;grid-template-rows:subgrid;row-gap:0;align-items:start}
.nav-group-title{margin:0 0 6px;font-size:.8125rem;font-weight:700;letter-spacing:.07em;text-transform:uppercase;color:var(--g)}
.nav-group-title a{color:inherit;text-decoration:none}
.nav-group ul,.nav-flat{margin:0;padding:0;list-style:none}
.nav-group ul{display:grid;gap:1px}
.nav-subject{display:flex;align-items:center;gap:10px;min-height:40px;padding:6px 8px;margin:0 -8px;border-radius:var(--r);color:var(--ink);text-decoration:none}
.nav-subject .i{color:var(--g)}
.nav-subject[aria-current]{background:var(--g-bg);font-weight:700}
.nav-flat{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:8px}
.nav-flat a{display:flex;align-items:center;min-height:44px;padding:8px 12px;border:1px solid var(--line);border-radius:var(--r);background:var(--card);color:var(--ink);text-decoration:none}
.nav-panel--grades .nav-flat{grid-template-columns:repeat(auto-fill,minmax(64px,1fr))}
.nav-panel--grades .nav-flat a{flex-direction:column;justify-content:center;padding:10px 4px}
.nav-flat a[aria-current]{border-color:var(--acc);background:var(--acc-bg)}
.grade-n{font:700 1.625rem/1 var(--serif)}
.grade-w{font-size:.8125rem;color:var(--ink2);margin-top:3px}

/* поиск */
.search{display:flex;align-items:stretch;background:var(--card);border:1px solid var(--line2);border-radius:var(--r);overflow:hidden;transition:border-color .15s,box-shadow .15s}
.search:focus-within{border-color:var(--acc);box-shadow:0 0 0 3px var(--acc-bg)}
.search-input{flex:1;min-width:0;height:46px;padding:0 14px;border:0;border-radius:0;background:transparent;font-size:1rem;-webkit-appearance:none;appearance:none}
.search-input:focus{outline:none}
.search-input::placeholder{color:var(--ink3);opacity:1}
.search-btn{display:inline-flex;align-items:center;gap:6px;padding:0 16px;border:0;background:var(--acc);color:#fff;font-weight:700;font-size:.9375rem;cursor:pointer;transition:background-color .15s}
.search-btn:hover{background:var(--acc-d)}
.search-btn:active .i{transform:scale(.92)}
.search-btn:focus-visible{outline-offset:-4px;outline-color:#fff}
.search--header{grid-column:1/-1;display:none;margin:0 0 12px}
.search--header.is-open{display:flex}
.search--header .search-btn-t{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}
.search--big .search-input{height:54px;font-size:1.0625rem;padding:0 16px}
.search--big .search-btn{padding:0 20px}
.search--big{border-radius:var(--r2);box-shadow:0 1px 0 rgba(32,32,45,.04),var(--shadow)}

/* ---------- общие блоки ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;padding:0 18px;border:1px solid var(--line2);border-radius:var(--r);background:var(--card);color:var(--ink);font-weight:700;font-size:.9375rem;text-decoration:none;cursor:pointer;transition:transform .16s var(--ease),background-color .15s,border-color .15s}
.btn:active{transform:scale(.97)}
.btn-solid{background:var(--acc);border-color:var(--acc);color:#fff}
.btn-solid:hover{background:var(--acc-d);border-color:var(--acc-d);color:#fff}
.block{margin:32px 0}
.block-head{display:flex;flex-wrap:wrap;align-items:baseline;justify-content:space-between;gap:6px 16px;margin:0 0 14px}
.block-head h2,.series-head h2,.handbook h2{margin:0;font:700 1.375rem/1.2 var(--serif);letter-spacing:-.005em}
.block-all{display:inline-flex;align-items:center;gap:6px;padding:11px 0;margin:-11px 0;font-weight:700;font-size:.9375rem;text-decoration:none}
.block-all .i{transition:transform .2s var(--ease)}
.chips{display:flex;flex-wrap:wrap;gap:8px;margin:0;padding:0;list-style:none}
.chip{display:inline-flex;align-items:center;gap:8px;min-height:40px;padding:6px 14px;border:1px solid var(--line2);border-radius:999px;background:var(--card);color:var(--ink);font-size:.9375rem;line-height:1.25;text-decoration:none;cursor:pointer;transition:background-color .15s,border-color .15s,transform .16s var(--ease)}
.chip:active{transform:scale(.97)}
.chip-n{font-size:.8125rem;color:var(--ink2);white-space:nowrap}
.chip.is-current,.chip[aria-pressed="true"]{background:var(--ink);border-color:var(--ink);color:#fff}
.chip.is-current .chip-n,.chip[aria-pressed="true"] .chip-n{color:#dcdce6}
.chip.is-current .lang-tag{background:#3b3b4c;color:#fff}
.lang-tag{display:inline-block;padding:1px 6px;border-radius:999px;background:var(--paper3);color:var(--ink2);font-size:.8125rem;font-weight:700;letter-spacing:.04em;line-height:1.45;vertical-align:.08em;font-style:normal}
.dot{color:var(--line2);padding:0 2px}
.empty{color:var(--ink2)}

/* карточки */
.cards{display:grid;grid-template-columns:minmax(0,1fr);gap:8px;margin:0;padding:0;list-style:none}
.card-link{display:flex;align-items:center;gap:12px;height:100%;padding:12px 14px;border:1px solid var(--line);border-radius:var(--r2);background:var(--card);color:var(--ink);text-decoration:none;transition:border-color .15s,box-shadow .2s var(--ease)}
.card-ico,.card-num{display:grid;place-items:center;flex:none;width:36px;height:36px;border-radius:var(--r);background:var(--g-bg);color:var(--g)}
.card-ico .i{width:20px;height:20px}
.card-num{background:var(--paper3);color:var(--ink2);font-weight:700;font-size:.875rem}
.card-body{display:flex;flex-direction:column;gap:4px;min-width:0}
.card-title{font-weight:700;line-height:1.35}
.card-meta{display:flex;flex-wrap:wrap;align-items:center;gap:0 2px;font-size:.8125rem;color:var(--ink2)}
.card--article .card-link{flex-direction:column;align-items:stretch;gap:6px;padding:14px 16px}
.card--article .card-meta{margin-top:auto}
.card-excerpt{display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;color:var(--ink2);font-size:.9375rem;line-height:1.5}
.cards--grid{grid-template-columns:repeat(auto-fill,minmax(270px,1fr));gap:12px}
.cards-ad{list-style:none;grid-column:1/-1}

/* реклама */
.ad{margin:28px 0;min-height:280px;text-align:center;overflow:hidden}
.ad-label{margin:0 0 4px;color:var(--ink3);font-size:.8125rem;letter-spacing:.08em;text-transform:uppercase}
.ad ins{display:block}
.ad:has(ins[data-ad-status="unfilled"]){display:none}
.cards-ad .ad{margin:8px 0}

/* крошки */
.crumbs{margin:0 0 6px;font-size:.8125rem}
.crumbs ol{display:flex;flex-wrap:wrap;align-items:center;margin:0;padding:0;list-style:none}
.crumbs li{display:inline-flex;align-items:center;min-width:0;max-width:100%}
.crumbs li+li::before{content:"";flex:none;width:6px;height:6px;margin:0 10px 0 6px;border-top:1.5px solid var(--ink3);border-right:1.5px solid var(--ink3);transform:rotate(45deg)}
.crumbs a{display:inline-block;padding:8px 0;color:var(--ink2);text-decoration:none}
.crumbs a:hover{color:var(--acc-d);text-decoration:underline}
.crumb-here span{display:block;max-width:26ch;padding:8px 0;overflow:hidden;color:var(--ink3);white-space:nowrap;text-overflow:ellipsis}
@media (max-width:639px){
  .crumbs li{display:none}
  .crumbs li:nth-last-child(2){display:flex}
  .crumbs li:nth-last-child(2)::before{content:"";flex:none;width:6px;height:6px;margin:0 8px 0 3px;border:0;border-bottom:1.5px solid var(--ink3);border-left:1.5px solid var(--ink3);transform:rotate(45deg)}
  .crumbs li:nth-last-child(2) a{overflow:hidden;white-space:nowrap;text-overflow:ellipsis}
  /* большая форма поиска: на узком экране у кнопки только значок, слово «Найти» — для экранного чтеца; подсказке поля нужно место */
  .search--big .search-btn-t{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}
}

/* пагинация */
.pager{display:flex;flex-wrap:wrap;align-items:center;justify-content:center;gap:8px;margin:28px 0}
.pager-pages{display:flex;flex-wrap:wrap;justify-content:center;gap:4px;margin:0;padding:0;list-style:none}
.pager-n,.pager-step{display:inline-flex;align-items:center;justify-content:center;gap:6px;min-width:44px;height:44px;padding:0 10px;border:1px solid var(--line);border-radius:var(--r);background:var(--card);color:var(--ink);font-weight:700;text-decoration:none}
.pager-step{padding:0 14px}
.pager-n[aria-current]{background:var(--ink);border-color:var(--ink);color:#fff}
.pager-gap{display:grid;place-items:center;width:20px;color:var(--ink3)}

/* ---------- главная ---------- */
.hero,.hub-head,.term-head--grid{background-color:var(--paper2);background-image:linear-gradient(var(--grid) 1px,transparent 1px),linear-gradient(90deg,var(--grid) 1px,transparent 1px);background-size:24px 24px;background-position:-1px -1px}
.hero{border-bottom:1px solid var(--line)}
.hero-in{position:relative;padding-top:30px;padding-bottom:30px}
.hero-in::before{content:"";position:absolute;top:0;bottom:0;left:calc(var(--gut)/2 - 1px);width:2px;background:var(--margin)}
.hero-title{max-width:20ch;margin:0 0 10px;font:700 clamp(1.75rem,1.2rem + 2.4vw,2.875rem)/1.1 var(--serif);letter-spacing:-.015em}
.hero-lead{max-width:50ch;margin:0 0 20px;color:var(--ink2);font-size:1.0625rem}
.hero .search{max-width:640px}
.hero-hints{display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin:14px 0 0;color:var(--ink2);font-size:.875rem}
.hero-hints a{display:inline-flex;align-items:center;min-height:36px;padding:0 12px;border:1px solid var(--line);border-radius:999px;background:var(--card);color:var(--ink);text-decoration:none}
.home-body{padding-bottom:16px}
.subject-groups{display:grid;gap:14px}
.subject-group{padding:14px;border:1px solid var(--line);border-radius:var(--r2);background:var(--card)}
.subject-group-h{margin:0 0 8px;color:var(--g);font-size:.8125rem;font-weight:700;letter-spacing:.07em;text-transform:uppercase}
.subject-tiles{display:grid;grid-template-columns:repeat(auto-fill,minmax(140px,1fr));gap:4px;margin:0;padding:0;list-style:none}
.subject-tile{display:grid;grid-template-columns:minmax(0,1fr);align-content:start;row-gap:2px;min-height:58px;padding:10px 8px;border-radius:var(--r);color:var(--ink);text-decoration:none;transition:background-color .15s}
.subject-tile-ico{display:grid;place-items:center;width:40px;height:40px;margin:0 0 6px;border-radius:var(--r);background:var(--g-bg);color:var(--g);transition:background-color .15s,color .15s}
.subject-tile-t{font-weight:700;font-size:.9375rem;line-height:1.25;overflow-wrap:break-word;hyphens:auto}
.subject-tile-n{color:var(--ink2);font-size:.8125rem}
.grade-row{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:8px;margin:0;padding:0;list-style:none}
.grade-tile{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:68px;padding:8px 2px;border:1px solid var(--line);border-radius:var(--r);background:var(--card);color:var(--ink);text-decoration:none;transition:border-color .15s,color .15s,transform .16s var(--ease)}
.grade-tile:active{transform:scale(.96)}
.grade-tile .grade-n{font-size:1.75rem}
.handbook{display:grid;gap:18px;align-items:end;margin:36px 0;padding:22px 20px;border-radius:var(--r2);background:var(--acc-bg)}
.handbook-k{margin:0 0 6px;color:var(--red);font-size:.8125rem;font-weight:700;letter-spacing:.07em;text-transform:uppercase}
.handbook h2{margin-bottom:12px}
.handbook ul{display:grid;gap:6px 28px;margin:0;padding:0;list-style:none}
.handbook li{position:relative;padding-left:20px}
.handbook li::before{content:"";position:absolute;left:2px;top:.62em;width:8px;height:8px;border-radius:999px;background:var(--acc)}
/* зона нажатия ≥ 24 px (WCAG 2.5.8): вертикальный отступ строчной ссылки растит зону, не сдвигая строки */
.handbook li a,.footer-about a,.dated a,.side-t a{padding:3px 0}
.handbook .btn{justify-self:start}

/* ---------- запись ---------- */
.entry-wrap{padding-top:10px;padding-bottom:16px}
.entry-grid{display:grid;gap:24px}
.entry{min-width:0}
.entry-head{margin:6px 0 22px}
.entry-title{margin:0 0 10px;font:700 clamp(1.5rem,1.15rem + 1.5vw,2.25rem)/1.18 var(--serif);letter-spacing:-.01em}
.entry-sub{display:flex;flex-wrap:wrap;align-items:center;gap:8px 16px}
.entry-date,.dated{margin:0;color:var(--ink2);font-size:.875rem}
.dated a{font-weight:700}
.btn-print{min-height:36px;padding:0 12px;font-size:.875rem}
.plaque{display:flex;flex-wrap:wrap;gap:6px;margin:0 0 12px;font-size:.875rem;line-height:1.3}
.plaque-subject,.plaque-item{display:inline-flex;align-items:center;gap:6px;min-height:30px;padding:3px 11px;border-radius:999px;text-decoration:none}
.plaque-subject{padding-left:7px;background:var(--g-bg);color:var(--g);font-weight:700}
.plaque-subject .i{width:18px;height:18px}
.plaque-item{background:var(--paper3);color:var(--ink2)}
a.plaque-item:hover{color:var(--ink)}
.print-src{display:none}
.verified{display:flex;align-items:center;gap:6px;margin:12px 0 0;color:var(--ink2);font-size:.875rem}
.verified .i{color:var(--ok)}

/* текст урока: перебиваем стили Word из старого контента */
.prose{max-width:70ch;font-size:1.0625rem;line-height:1.65}
.prose *{font-family:inherit!important;font-size:inherit!important;line-height:inherit!important;text-indent:0!important;letter-spacing:normal!important}
.prose p,.prose li,.prose div{margin-left:0!important;margin-right:0!important}
.prose [style*="justify"],.prose [align="justify"]{text-align:left!important}
.prose div[style*="background"],.prose div[style*="padding"]{padding:0!important;background:none!important}
.prose>:first-child{margin-top:0!important}
.prose p{margin:0 0 .95em!important}
.prose h2,.prose h3,.prose h4,.prose h5,.prose h6{margin:1.6em 0 .55em!important;color:var(--ink);font-weight:700;line-height:1.28!important;text-align:left}
.prose h1,.prose h2{font-family:var(--serif)!important;font-size:1.4em!important;letter-spacing:-.005em}
.prose h3{font-size:1.18em!important}
.prose h4,.prose h5,.prose h6{font-size:1.04em!important}
.prose b,.prose strong{font-weight:700}
.prose sub,.prose sup{font-size:.75em!important;line-height:0!important}
.prose ul,.prose ol{margin:0 0 1em!important;padding-left:1.45em!important}
.prose li{margin:0 0 .35em!important}
.prose li>p{margin:0 0 .35em!important}
.prose a{overflow-wrap:anywhere}
.prose img{max-width:100%!important;height:auto!important;border-radius:var(--r)}
.prose figure{margin:1.2em 0}
.prose figcaption{color:var(--ink2);font-size:.875em!important}
.prose blockquote{margin:1.2em 0!important;padding:.8em 1em;border-radius:var(--r);background:var(--paper2)}
.prose hr{height:0;margin:1.8em 0;border:0;border-top:1px solid var(--line)}
.prose iframe{display:block;width:100%;aspect-ratio:16/9;height:auto;border:0;border-radius:var(--r)}
.prose table{display:block;max-width:100%;overflow-x:auto;margin:1.2em 0!important;border-collapse:collapse;font-size:.9375em!important;line-height:1.5!important}
.prose .table-scroll{overflow-x:auto;margin:1.2em 0;border-radius:var(--r);-webkit-overflow-scrolling:touch}
.prose .table-scroll table{display:table;width:100%!important;max-width:none;margin:0!important;background:none}
/* Тень у края, за которым ещё есть таблица (без JS): «шторки» цвета фона едут с содержимым (local) и закрывают
   тени (scroll), когда край таблицы дошёл до края рамки. --tbl-bg — фон под таблицей. */
.prose{--tbl-bg:var(--paper)}
.hub-docs .prose{--tbl-bg:var(--card)}
.term-desc{--tbl-bg:var(--paper2)}
.prose table,.prose .table-scroll{background:linear-gradient(90deg,var(--tbl-bg) 30%,transparent) 0 0/40px 100% no-repeat local,linear-gradient(270deg,var(--tbl-bg) 30%,transparent) 100% 0/40px 100% no-repeat local,linear-gradient(90deg,rgba(32,32,45,.2),transparent) 0 0/14px 100% no-repeat scroll,linear-gradient(270deg,rgba(32,32,45,.2),transparent) 100% 0/14px 100% no-repeat scroll;background-color:var(--tbl-bg)}
.prose td,.prose th{min-width:7rem;width:auto!important;height:auto!important;padding:.45em .65em!important;border:1px solid var(--line2)!important;vertical-align:top;text-align:left}
.prose th{background:rgba(192,180,146,.1);font-weight:700}
.prose td>:last-child,.prose th>:last-child{margin-bottom:0!important}
.prose td p,.prose th p{margin:0 0 .4em!important}
.prose .ad-label{margin:0 0 4px!important;font-family:var(--sans)!important;font-size:.8125rem!important;line-height:1.4!important}
.prose .ad{max-width:none}

/* соседние уроки и сайдбар */
.lesson-nav{display:grid;gap:10px;max-width:45rem;margin:36px 0 0}
.lesson-nav-a{display:flex;flex-direction:column;gap:4px;padding:14px 16px;border:1px solid var(--line);border-radius:var(--r2);background:var(--card);color:var(--ink);text-decoration:none;transition:border-color .15s,box-shadow .2s var(--ease)}
.lesson-nav-k{display:inline-flex;align-items:center;gap:6px;color:var(--acc);font-size:.8125rem;font-weight:700}
.lesson-nav-k .i{width:1.1em;height:1.1em}
.lesson-nav-t{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;font-weight:700;line-height:1.35}
.lesson-nav-next{align-items:flex-end;text-align:right}
.side-box{margin:0 0 20px;padding:16px;border:1px solid var(--line);border-radius:var(--r2);background:var(--card)}
.side-k{margin:0 0 6px;color:var(--ink2);font-size:.8125rem;font-weight:700;letter-spacing:.07em;text-transform:uppercase}
.side-t{margin:0 0 4px;font-weight:700;line-height:1.35}
.side-t a{color:var(--ink);text-decoration:none}
.side-t a:hover{color:var(--acc-d);text-decoration:underline}
.side-n{margin:0;color:var(--ink2);font-size:.875rem}
.side-list{display:grid;gap:1px;margin:0;padding:0;list-style:none}
.side-list a,.subject-card li a,.series-item a{display:flex;align-items:baseline;justify-content:space-between;gap:10px;padding:7px 8px;margin:0 -8px;border-radius:var(--r);color:var(--ink);text-decoration:none;font-size:.9375rem;line-height:1.3}
.side-list a.is-current{background:var(--acc-bg);color:var(--acc-d);font-weight:700}
.side-name{flex:1}.grade-tag{flex:none;min-width:3.3em;color:var(--ink2);font-size:.8125rem;font-variant-numeric:tabular-nums}
.series-count{flex:none;color:var(--ink2);font-size:.8125rem;white-space:nowrap}
.entry-side .ad,.term-side .ad,.hub-side .ad{margin:0}

/* ---------- рубрика, хаб ---------- */
.term-head,.hub-head{padding:10px 0 24px;border-bottom:1px solid var(--line);background-color:var(--paper2)}
.term-title,.hub-title{display:flex;align-items:flex-start;gap:14px;margin-top:6px}
.term-title>div,.hub-title>div{min-width:0}
.hub-ico,.grade-badge{display:grid;place-items:center;flex:none;width:52px;height:52px;margin-top:2px;border-radius:var(--r2);background:var(--g);color:#fff}
.hub-ico .i{width:28px;height:28px}
.grade-badge{background:var(--acc);font:700 1.75rem/1 var(--serif)}
.term-title .entry-title,.hub-title .entry-title{margin-bottom:6px}
.term-lead,.hub-lead{margin:0;color:var(--ink2);font-size:.9375rem}
.term-hub{margin:16px 0 0}
.term-hub a{display:inline-flex;align-items:center;gap:6px;font-weight:700;text-decoration:none}
.term-desc{margin-top:14px;font-size:1rem}
.term-body{padding-bottom:8px}
.term-grid{display:grid;gap:24px;margin:24px 0}
.term-list{min-width:0}
.subject-cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(min(320px,100%),1fr));gap:12px;margin:0;padding:0;list-style:none}
.subject-card{padding:14px 16px;border:1px solid var(--line);border-radius:var(--r2);background:var(--card)}
.subject-card-h{margin:0 0 6px;font-weight:700}
.subject-card-h a{display:flex;align-items:center;gap:10px;color:var(--ink);text-decoration:none}
.subject-card-h .i{color:var(--g)}
.subject-card ul{display:grid;gap:1px;margin:0;padding:0;list-style:none}
.hub-jump ul{display:flex;flex-wrap:wrap;gap:8px;margin:16px 0 0;padding:2px 0;list-style:none}
.hub-jump li{flex:none}
.hub-jump a{display:inline-flex;align-items:center;min-height:38px;padding:0 14px;border:1px solid var(--line);border-radius:999px;background:var(--card);color:var(--ink);font-size:.875rem;white-space:nowrap;text-decoration:none}
.hub-text,.hub-docs,.hub-sources{margin:28px 0}
.hub-sources{padding-top:20px;border-top:1px solid var(--line)}
.hub-sources .prose{font-size:.9375rem}
.hub-text{display:grid;gap:24px}
.hub-text-main{min-width:0}
.hub-text,.hub-docs,.series,#popular,.prose [id]{scroll-margin-top:12px}
.hub-docs .prose{padding:18px 20px;border:1px solid var(--line);border-radius:var(--r2);background:var(--card);max-width:none}
.hub-docs .prose>:first-child{margin-top:0!important}

/* сетка серий «класс × язык» */
.series{margin:36px 0}
.series-head{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;margin:0 0 14px}
.lang-filter{display:flex;flex-wrap:wrap;gap:6px}
.lang-filter .chip{min-height:38px;padding:0 12px;font-size:.875rem}
.series-table{overflow:hidden;border:1px solid var(--line);border-radius:var(--r2);background:var(--card)}
.series-cols{display:none}
.series-rows{margin:0;padding:0;list-style:none}
.series-row{display:grid;grid-template-columns:52px minmax(0,1fr);column-gap:12px;padding:12px 14px;border-top:1px solid var(--line)}
.series-row:first-child{border-top:0}
.series-grade{grid-row:span 6;display:flex;flex-direction:column;align-items:flex-start;margin:2px 0 0;font-weight:400;line-height:1}
.series-grade-n{color:var(--g);font:700 1.75rem/1 var(--serif)}
.series-grade-w{margin-top:3px;color:var(--ink2);font-size:.8125rem}
.series-cell{grid-column:2;min-width:0}
.series-cell+.series-cell{margin-top:6px}
.series-cell.is-empty{display:none}
.series-cell ul,.series-other ul{display:grid;gap:1px;margin:0;padding:0;list-style:none}
.series-cell-lang{margin:2px 0 0;color:var(--ink3);font-size:.8125rem;font-weight:700;letter-spacing:.07em;text-transform:uppercase}
.series-name{font-weight:700}
.series-none{color:var(--line2)}
.series-other{margin-top:14px;padding:14px 16px;border:1px solid var(--line);border-radius:var(--r2);background:var(--card)}
.series-other h3{margin:0 0 6px;font-size:1rem}

/* ---------- поиск, 404, указатель ---------- */
.search-page,.list-page{padding-top:10px;padding-bottom:16px}
.search-head{margin:6px 0 24px}
.search-head .search{max-width:640px;margin-top:14px}
.search-count{margin:12px 0 0;color:var(--ink2)}
.empty-state{max-width:70ch;margin:0 0 24px;padding:16px 18px;border-radius:var(--r2);background:var(--paper2)}
.empty-state p{margin:0}
.nf{padding-top:28px;padding-bottom:16px}
.nf-in{max-width:640px}
.nf-code{margin:0;color:var(--red);font:700 clamp(4.5rem,3rem + 7vw,7.5rem)/1 var(--serif);letter-spacing:-.02em}
.nf-lead{margin:0 0 18px;color:var(--ink2)}
.index-groups{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:12px;margin:0 0 28px}
.index-group{padding:14px;border:1px solid var(--line);border-radius:var(--r2);background:var(--card)}
.index-group ul{display:grid;gap:1px;margin:0;padding:0;list-style:none}
.index-group a{display:flex;align-items:center;gap:10px;min-height:40px;padding:6px 8px;margin:0 -8px;border-radius:var(--r);color:var(--ink);text-decoration:none}
.index-group .i{color:var(--g)}
.entry-wrap--page .entry{max-width:760px}
.link-list{margin:24px 0 0;padding-left:1.2em}
.link-list li{margin:0 0 6px}

/* ---------- подвал ---------- */
.site-footer{margin-top:48px;padding:34px 0 18px;background:var(--ink);color:#d4d4de}
.footer-grid{display:grid;gap:24px}
.footer-brand{margin:0 0 8px;color:#fff;font:700 1.375rem/1.2 var(--serif)}
.footer-about p{max-width:46ch;margin:0 0 8px}
.site-footer a{color:#fff;text-decoration:none}
.site-footer a:hover{color:#fff;text-decoration:underline}
.footer-nav ul{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0 24px;margin:0;padding:0;list-style:none}
.footer-nav a{display:inline-block;max-width:100%;padding:8px 0;font-size:.9375rem;overflow-wrap:break-word;hyphens:auto}
.footer-sub a{color:#d4d4de}
.footer-bottom{margin-top:22px;padding-top:15px;background:linear-gradient(#3b3b4c,#3b3b4c) no-repeat var(--gut) 0/calc(100% - var(--gut)*2) 1px;color:#ababbb;font-size:.8125rem}
.footer-bottom p{margin:0}

/* ---------- наведение ---------- */
@media (hover:hover){
  .nav-link:hover{background:var(--paper3)}
  .nav-dd[open]>.nav-link:hover{background:var(--ink)}
  .nav-subject:hover{background:var(--g-bg)}
  .nav-flat a:hover,.grade-tile:hover{border-color:var(--acc);color:var(--acc-d)}
  .search-toggle:hover{background:var(--paper3)}
  .card-link:hover,.lesson-nav-a:hover{border-color:var(--line2);box-shadow:var(--shadow)}
  .card-link:hover .card-title,.lesson-nav-a:hover .lesson-nav-t{color:var(--acc-d)}
  .subject-tile:hover{background:var(--g-bg)}
  .subject-tile:hover .subject-tile-ico{background:var(--g);color:#fff}
  .chip--link:hover{border-color:var(--acc);color:var(--acc-d)}
  .chip--link.is-current:hover{color:#fff}
  .lang-filter .chip:hover{border-color:var(--ink)}
  .hero-hints a:hover,.hub-jump a:hover{border-color:var(--acc);color:var(--acc-d)}
  .side-list a:hover,.subject-card li a:hover,.series-item a:hover,.index-group a:hover{background:var(--g-bg)}
  .side-list a.is-current:hover{background:var(--acc-bg)}
  .block-all:hover .i,.term-hub a:hover .i{transform:translateX(3px)}
  .pager a:hover{border-color:var(--acc);color:var(--acc-d)}
  .btn:not(.btn-solid):hover{border-color:var(--ink)}
}

/* ---------- планшет ---------- */
@media (min-width:640px){
  :root{--gut:24px}
  .grade-row{grid-template-columns:repeat(11,minmax(0,1fr))}
  .handbook{grid-template-columns:minmax(0,1fr) auto;padding:28px 32px}
  .handbook ul{grid-template-columns:repeat(2,minmax(0,max-content))}
  .lesson-nav{grid-template-columns:1fr 1fr}
  .lesson-nav-next{grid-column:2}
  .footer-nav ul{grid-template-columns:repeat(3,minmax(0,1fr))}
  .crumb-here span{max-width:48ch}
}
@media (min-width:768px){
  .prose{font-size:1.125rem}
  .block{margin:44px 0}
  .block-head h2,.series-head h2,.handbook h2{font-size:1.625rem}
  .subject-groups{grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
  .hero-in{padding-top:56px;padding-bottom:52px}
  .hero-in::before{left:calc(var(--gut)/2 - 1px)}
  .series-cols{display:grid;grid-template-columns:96px repeat(var(--cols),minmax(0,1fr));column-gap:20px;padding:10px 18px;border-bottom:1px solid var(--line);background:var(--paper2);color:var(--ink2);font-size:.8125rem;font-weight:700;letter-spacing:.07em;text-transform:uppercase}
  .series-row{grid-template-columns:96px repeat(var(--cols),minmax(0,1fr));column-gap:20px;padding:14px 18px}
  .series-grade{grid-row:auto}
  .series-cell{grid-column:auto}
  .series-cell+.series-cell{margin-top:0}
  .series-cell.is-empty{display:block}
  .series-cell{max-width:46rem}
  .series-cell-lang{display:none}
  .series-other ul{grid-template-columns:repeat(2,minmax(0,1fr));column-gap:28px}
  .more .cards--articles{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
  .footer-grid{grid-template-columns:minmax(0,1fr) minmax(0,1.6fr);gap:40px}
}
/* ---------- десктоп ---------- */
@media (min-width:1024px){
  .header-bar{grid-template-columns:auto auto minmax(0,1fr);column-gap:24px;min-height:68px}
  .search-toggle{display:none}
  .nav{grid-column:auto;margin:0}
  .nav-list{flex-wrap:nowrap;gap:4px;padding:0}
  .nav-link{background:transparent}
  .search--header{display:flex;grid-column:auto;justify-self:end;width:100%;max-width:340px;margin:0}
  .search--header .search-input{height:42px;text-overflow:ellipsis}
  .entry-grid,.term-grid,.hub-text{grid-template-columns:minmax(0,1fr) 300px;gap:56px}
  .block--articles .cards--grid{grid-template-columns:repeat(3,minmax(0,1fr))}
  .entry-side,.term-side{padding-top:4px}
  .term-head,.hub-head{padding-bottom:30px}
  .hub-ico,.grade-badge{width:60px;height:60px}
  .hub-ico .i{width:32px;height:32px}
  .hero-in::before{left:-14px}
}
@media (min-width:1024px) and (max-width:1199px){
  .header-bar{column-gap:16px}
  .nav-link{padding:0 10px}
}
@media (max-width:1023px){
  .entry-side .ad,.term-side .ad,.hub-side .ad{display:none}
  .entry-side .side-box,.term-side .side-box{margin-bottom:0}
  /* меню на весь экран: все пункты доступны, страница под ним не прокручивается (site.js: html.nav-locked) */
  .js .nav-panel{position:fixed;inset:0;z-index:60;max-height:none;height:100vh;height:100dvh;padding:0 0 max(24px,env(safe-area-inset-bottom));border:0;box-shadow:none}
  .js .nav-panel-head{display:flex;align-items:center;justify-content:space-between;gap:12px;position:sticky;top:0;z-index:1;min-height:60px;margin-bottom:16px;background:var(--paper);border-bottom:1px solid var(--line)}
  .nav-locked,.nav-locked body{overflow:hidden}
}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition:none!important}
}

/* ---------- печать урока: только текст ---------- */
@media print{
  @page{margin:14mm 14mm 16mm}
  body{background:#fff;color:#000;font-size:11pt}
  .site-header,.site-footer,.skip,.crumbs,.ad,.lesson-nav,.entry-side,.term-side,.more,.same-grade,.btn,.pager,.hub-jump,.handbook,.lang-filter,.dated,nav{display:none!important}
  .wrap{max-width:none;padding:0}
  .entry-grid{display:block}
  .entry-head{margin:0 0 10pt}
  .entry-title{font-size:17pt;line-height:1.2}
  .plaque{font-size:9pt}
  .plaque-subject,.plaque-item{min-height:0;padding:0;background:none;color:#000}
  .plaque .i{display:none}
  .prose{max-width:none;font-size:11.5pt;line-height:1.45}
  .prose a{color:#000;text-decoration:none}
  .prose .table-scroll{overflow:visible}
  .prose table{display:table;width:100%!important}
  .prose td,.prose th{min-width:0;border-color:#777!important}
  .prose tr,.prose img{break-inside:avoid}
  .prose h2,.prose h3,.prose h4{break-after:avoid}
  .print-src{display:block;margin-top:12pt;color:#444;font-size:9pt}
}