/* Design v37 Stage 2: adapted from the approved Academy/Articles sources. */
@font-face{font-family:"Golos Text";font-weight:400 700;font-display:swap;src:url("../fonts/golos-variable-cyrillic.woff2") format("woff2");unicode-range:U+0301,U+0400-045F,U+0490-0491,U+04B0-04B1,U+2116}
@font-face{font-family:"Golos Text";font-weight:400 700;font-display:swap;src:url("../fonts/golos-variable-latin.woff2") format("woff2")}
@font-face{font-family:"IBM Plex Mono";font-weight:400 500;font-display:swap;src:url("../fonts/ibmplexmono-400-cyrillic.woff2") format("woff2")}
@font-face{font-family:"Unbounded";font-weight:500 700;font-display:swap;src:url("../fonts/unbounded-variable-cyrillic.woff2") format("woff2");unicode-range:U+0301,U+0400-045F,U+0490-0491,U+04B0-04B1,U+2116}
@font-face{font-family:"Unbounded";font-weight:500 700;font-display:swap;src:url("../fonts/unbounded-variable-latin.woff2") format("woff2")}
*{box-sizing:border-box}html,body{margin:0;overflow-x:clip}body{background:#06080d}.kx{--accent:#5ce1e6;--bg:#06080d;--bg-2:#0a0e15;--card:#0e131b;--card-2:#131925;--line:#1f2633;--line-2:#262d3b;--line-3:#2f3849;--ink:#ece8e1;--muted:#9aa0ab;--soft:#b9bdc6;--faint:#6d7380;--ink-rgb:236,232,225;--glass-rgb:10,14,21;--ok:#4fb38f;--warn:#d9b45f;--bad:#e07a66;min-height:100dvh;background:var(--bg);color:var(--ink);font-family:"Golos Text",system-ui,sans-serif;-webkit-font-smoothing:antialiased;color-scheme:dark;transition:background-color .35s,color .35s}
.kx[data-theme="light"]{--bg:#e3e7ed;--bg-2:#dbe0e7;--card:#f2f4f7;--card-2:#e6eaf0;--line:#cdd4de;--line-2:#c1c9d4;--line-3:#aeb8c6;--ink:#12161d;--muted:#4d5461;--soft:#353b46;--faint:#5f6673;--ink-rgb:18,22,29;--glass-rgb:242,244,247;--ok:#23735a;--warn:#8a6514;--bad:#b34a37;color-scheme:light}body:has(.kx[data-theme="light"]){background:#e3e7ed}
a{color:inherit;text-decoration:none}.wrap{max-width:1240px;margin:0 auto;padding-inline:clamp(16px,4vw,40px)}.disp{font-family:"Unbounded","Golos Text",sans-serif;font-weight:600;letter-spacing:-.025em;margin:0}.num{font-family:"IBM Plex Mono",monospace;font-variant-numeric:tabular-nums}.muted{color:var(--muted)}.soft{color:var(--soft)}.faint{color:var(--faint)}
.skip-link{position:fixed;z-index:100;left:-9999px;top:8px;padding:10px 14px;border-radius:10px;background:#fff;color:#111;font-weight:700}.skip-link:focus{left:8px}.hdr{position:sticky;top:12px;z-index:20;padding-inline:clamp(12px,3vw,28px)}.hdr-in{max-width:1240px;margin:0 auto;height:64px;border-radius:18px;display:flex;align-items:center;gap:18px;padding:0 12px 0 20px;background:rgba(var(--glass-rgb),.82);backdrop-filter:blur(16px);border:1px solid rgba(var(--ink-rgb),.09)}
.stage2-brand{display:flex;align-items:center;gap:10px;flex:none}.stage2-brand>span{display:flex;flex-direction:column;gap:3px;line-height:1}.stage2-brand small{font-size:9.5px;font-weight:600;letter-spacing:.12em;text-transform:uppercase;color:var(--muted);white-space:nowrap}.wordmark{display:block;width:143.9px;height:18px;background:currentColor;-webkit-mask:url("../brand/loruss-wordmark.svg") center/contain no-repeat;mask:url("../brand/loruss-wordmark.svg") center/contain no-repeat}.wordmark>span{font-size:0}.wordmark--footer{width:128px;height:16px}.lmark .lm-out circle:first-child,.lmark .lm-in circle{stroke:currentColor;fill:none}.lmark .lm-out circle:not(:first-child),.lmark>circle{fill:var(--accent)}
.hlinks{display:flex;gap:2px;margin-left:auto}.hl{font-size:14px;font-weight:500;color:var(--muted);padding:8px 12px;border-radius:999px;white-space:nowrap}.hl:hover,.hl.on{color:var(--ink);background:rgba(var(--ink-rgb),.07)}.icb{width:40px;height:40px;border-radius:12px;border:1px solid var(--line);background:transparent;color:var(--ink);display:grid;place-items:center;cursor:pointer}.mnav{display:none;position:relative}.mnav-s{list-style:none;width:42px;height:42px;border:1px solid var(--line-2);border-radius:12px;display:grid;place-items:center;cursor:pointer}.mnav-s::-webkit-details-marker{display:none}.mnav-panel{position:absolute;right:0;top:calc(100% + 10px);min-width:240px;display:flex;flex-direction:column;padding:8px;border-radius:16px;background:var(--card);border:1px solid var(--line-2);box-shadow:0 30px 70px -30px #000;z-index:40}.mnav-panel a,.mnav-panel span{padding:11px 14px;border-radius:10px}.mnav-panel a:hover{background:rgba(var(--ink-rgb),.06)}.mnav-panel .sep{height:1px;padding:0;background:var(--line);margin:4px 6px}
.stage2-main{padding-top:48px;padding-bottom:96px}.stage2-stack{display:flex;flex-direction:column;gap:44px}.stage2-hero{display:grid;grid-template-columns:minmax(0,1.25fr) minmax(0,1fr);gap:40px;align-items:end}.kick{font-size:12.5px;font-weight:600;letter-spacing:.14em;text-transform:uppercase;color:var(--accent)}.stage2-title{font-size:clamp(36px,4.8vw,63px);line-height:1.02}.stage2-lead{margin:0;font-size:18px;line-height:1.6;max-width:700px;color:var(--muted)}
.search{display:flex;align-items:center;gap:10px;min-height:56px;padding:0 16px;border-radius:18px;border:1px solid var(--line-2);background:var(--card)}.search:focus-within{border-color:var(--accent);box-shadow:0 0 0 4px rgba(92,225,230,.14)}.search input{flex:1;min-width:0;border:0;outline:0;background:transparent;color:var(--ink);font:inherit;font-size:16px}.search button{min-height:40px}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:42px;padding:0 18px;border-radius:12px;border:0;font:inherit;font-size:14px;font-weight:600;cursor:pointer}.btn-acc{background:var(--accent);color:#071018}.btn-ghost{background:transparent;border:1px solid var(--line-2);color:var(--ink)}.btn[disabled],.disabled{cursor:not-allowed;opacity:.58}.btn:focus-visible,.course-card:focus-visible,.lesson-row:focus-visible,.article-card:focus-visible,.rubric:focus-visible,.hl:focus-visible,.icb:focus-visible,.mnav-s:focus-visible,a:focus-visible{outline:2px solid var(--ink);outline-offset:3px}
.stage2-stats{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));border:1px solid var(--line);border-radius:20px;overflow:hidden;background:var(--card)}.stage2-stats>div{padding:18px 22px;border-left:1px solid var(--line);display:flex;flex-direction:column;gap:4px}.stage2-stats>div:first-child{border-left:0}.stage2-stat{font:600 28px "Unbounded",sans-serif}.status-note{display:flex;gap:12px;padding:15px 17px;border:1px solid rgba(92,225,230,.3);border-radius:15px;background:rgba(92,225,230,.06);color:var(--soft);line-height:1.55}.status-note strong{color:var(--ink)}
.course-grid,.article-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(min(100%,320px),1fr));gap:16px}.course-card,.article-card{display:flex;flex-direction:column;border:1px solid var(--line);border-radius:24px;overflow:hidden;background:var(--card);transition:transform .25s,border-color .25s}.course-card[href]:hover,.article-card[href]:hover{transform:translateY(-3px);border-color:var(--line-3)}.cover{position:relative;height:150px;padding:16px 18px;display:flex;align-items:flex-end;overflow:hidden;background:var(--cover)}.cover::before{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.07) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.07) 1px,transparent 1px);background-size:26px 26px;mask-image:linear-gradient(120deg,transparent 15%,#000 90%)}.cover-glyph{position:absolute;right:-3%;top:50%;translate:0 -50%;font:700 88px "Unbounded";color:rgba(255,255,255,.9);mix-blend-mode:overlay}.cover-label{position:relative;padding:5px 10px;border-radius:999px;background:rgba(6,8,13,.55);color:#ece8e1;font-size:12px;font-weight:600}.card-body{display:flex;flex-direction:column;gap:10px;padding:18px 20px 20px;flex:1}.card-body h2,.card-body h3{margin:0;font-size:19px;line-height:1.3}.card-meta{display:flex;justify-content:space-between;gap:10px;flex-wrap:wrap;margin-top:auto;padding-top:8px;font-size:12.5px;color:var(--faint)}.pill{display:inline-flex;align-items:center;align-self:flex-start;padding:4px 10px;border-radius:999px;background:rgba(var(--ink-rgb),.07);font-size:12px;font-weight:600;color:var(--soft)}
.course-head{display:grid;grid-template-columns:minmax(0,1.3fr) minmax(0,1fr);gap:28px}.course-summary{padding:clamp(22px,4vw,40px);border:1px solid var(--line);border-radius:28px;background:var(--card)}.lesson-list{border:1px solid var(--line);border-radius:20px;background:var(--card);overflow:hidden}.lesson-row{display:grid;grid-template-columns:44px minmax(0,1fr) auto;gap:14px;align-items:center;width:100%;padding:16px 18px;border-bottom:1px solid var(--line)}.lesson-row:last-child{border-bottom:0}.lesson-row[href]:hover{background:rgba(var(--ink-rgb),.04)}.lesson-number{width:36px;height:36px;border-radius:50%;border:1px solid var(--line-2);display:grid;place-items:center;font:600 13px "IBM Plex Mono"}.lesson-status{font-size:12px;padding:4px 9px;border-radius:999px;background:rgba(var(--ink-rgb),.07);color:var(--muted)}.lesson-status.ready{background:rgba(79,179,143,.14);color:var(--ok)}
.lesson-layout,.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 240px;gap:48px;align-items:start}.prose{font-size:17px;line-height:1.75;color:var(--soft)}.prose h2{font:600 22px "Unbounded";letter-spacing:-.02em;color:var(--ink);margin:40px 0 12px;scroll-margin-top:96px}.prose p{margin:0 0 16px}.prose ul{padding-left:22px}.prose b,.prose strong{color:var(--ink)}.formula{font:400 15px "IBM Plex Mono";padding:16px 18px;border-radius:14px;background:var(--card-2);border:1px solid var(--line);overflow-x:auto}.comparison{width:100%;border-collapse:collapse;font-size:14.5px}.comparison th,.comparison td{padding:12px 14px;border-bottom:1px solid var(--line);text-align:left}.comparison th{color:var(--muted);font-size:12.5px}.comparison .numeric{text-align:right;font-family:"IBM Plex Mono"}.toc{position:sticky;top:96px;display:flex;flex-direction:column;gap:4px;font-size:13.5px}.toc a{padding:6px 10px;border-left:2px solid var(--line);color:var(--muted)}.toc a:hover{border-color:var(--accent);color:var(--ink)}
.rubrics{display:flex;gap:6px;flex-wrap:wrap}.rubric{padding:9px 16px;border:1px solid var(--line-2);border-radius:999px;color:var(--muted);font-size:14px}.rubric:hover{color:var(--ink);border-color:var(--line-3)}.rubric.active{background:var(--accent);border-color:transparent;color:#071018}.empty{padding:48px;border:1px dashed var(--line-2);border-radius:20px;text-align:center}.subscription-disabled{display:grid;grid-template-columns:1.2fr 1fr;gap:28px;align-items:center;padding:clamp(24px,4vw,44px);border:1px solid var(--line);border-radius:28px;background:radial-gradient(90% 140% at 100% 0%,rgba(92,225,230,.14),transparent 60%),var(--card)}
.stage2-footer{border-top:1px solid var(--line);padding:50px 0 32px}.stage2-footer__grid{display:grid;grid-template-columns:1.4fr repeat(3,1fr);gap:34px}.stage2-footer nav,.stage2-footer__grid>div{display:flex;flex-direction:column;gap:10px;font-size:14px}.stage2-footer a:hover{text-decoration:underline}.stage2-footer__legal{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;margin-top:34px;padding-top:22px;border-top:1px solid var(--line);color:var(--faint);font-size:12.5px}.link-button{padding:0;border:0;background:transparent;color:inherit;font:inherit;text-align:left;cursor:pointer}
/* Shared consent presentation, scoped to the isolated Stage 2 shell. */
.consent-banner{position:fixed;z-index:120;right:24px;bottom:24px;width:min(430px,calc(100vw - 32px));padding:20px;border:1px solid var(--line);border-radius:24px;background:var(--card);box-shadow:0 30px 80px -30px rgba(0,0,0,.8)}
.consent-banner__body{display:flex;flex-direction:column;gap:16px}
.consent-banner__text{margin:0;color:var(--muted);font-size:13px;line-height:1.55}.consent-banner__text a{color:var(--ink);text-decoration:underline}
.consent-banner__actions{display:flex;flex-wrap:wrap;gap:8px}
.consent-banner .btn--sm,.consent-modal .btn--sm{min-height:40px;padding:0 15px;font-size:13px}
.consent-banner .btn:not(.btn--ghost,.btn--text),.consent-modal .btn:not(.btn--ghost,.btn--text){background:var(--accent);color:#071018}
.consent-banner .btn--ghost,.consent-modal .btn--ghost{border:1px solid var(--line-2);background:rgba(var(--ink-rgb),.04);color:var(--ink)}
.consent-banner .btn--text,.consent-modal .btn--text{background:transparent;color:var(--muted)}
.consent-modal{position:fixed;z-index:130;inset:0;display:grid;place-items:center;padding:16px;background:rgba(0,0,0,.56)}
.consent-modal[hidden]{display:none}
.consent-modal__panel{width:min(520px,100%);max-height:calc(100vh - 32px);overflow:auto;padding:24px;border:1px solid var(--line);border-radius:24px;background:var(--card);box-shadow:0 30px 80px -30px rgba(0,0,0,.8)}
.consent-modal__title{margin:0;color:var(--ink);font-size:21px}.consent-modal__row{padding:14px 0;border-bottom:1px solid var(--line)}
.consent-modal__row .field--check{display:flex;align-items:flex-start;gap:10px;color:var(--muted);font-size:13px;line-height:1.5}
.consent-modal__actions{display:flex;justify-content:flex-end;gap:8px;margin-top:16px}
@media(max-width:600px){.consent-banner{right:16px;bottom:16px}.consent-banner__actions,.consent-modal__actions{display:grid;grid-template-columns:1fr}.consent-banner__actions .btn,.consent-modal__actions .btn{width:100%}}
@media (max-width:980px){.hlinks{display:none}.mnav{display:block;margin-left:auto}.stage2-hero,.course-head{grid-template-columns:1fr}.lesson-layout,.article-layout{grid-template-columns:1fr}.toc{display:none}.stage2-footer__grid{grid-template-columns:repeat(2,1fr)}}
@media (max-width:760px){.stage2-stats{grid-template-columns:repeat(2,1fr)}.stage2-stats>div:nth-child(3){border-left:0}.stage2-stats>div:nth-child(n+3){border-top:1px solid var(--line)}.subscription-disabled{grid-template-columns:1fr}.lesson-row{grid-template-columns:40px 1fr}.lesson-status{grid-column:2}.stage2-footer__grid{grid-template-columns:1fr 1fr}}
@media (max-width:480px){.hdr-in{padding:0 8px 0 12px;gap:8px}.stage2-brand small{display:none}.wordmark{width:112px;height:14px}.stage2-main{padding-top:34px}.stage2-title{font-size:clamp(26px,8.5vw,36px)}.stage2-footer__grid{grid-template-columns:1fr}.search{align-items:stretch;height:auto;padding:8px;flex-wrap:wrap}.search input{min-height:40px;padding-inline:8px}.search button{width:100%}.comparison{font-size:12.5px}.comparison th,.comparison td{padding:9px 7px}}
@media (prefers-reduced-motion:no-preference){.lmark .lm-out{animation:stage2-spin 16s linear infinite}.lmark .lm-in{animation:stage2-spin 9s linear infinite reverse}.stage2-stack{animation:stage2-rise .45s cubic-bezier(.2,.8,.2,1) both}}
@media (prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;animation:none!important;transition:none!important}.course-card[href]:hover,.article-card[href]:hover{transform:none}}
@keyframes stage2-spin{to{transform:rotate(360deg)}}@keyframes stage2-rise{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:none}}