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.card.ex>.ex-title{position:absolute;top:-14px;left:22px;display:inline-block;margin:0;padding:4px 14px;background:var(--surface);color:var(--fg);border:1px solid var(--hair);border-radius:var(--radius-btn);box-shadow:var(--shadow-sm);font:650 .82rem/1.3 var(--sans)}.lesson-main .card.ex>p:first-of-type{margin-top:0}.lesson-main .card.ex>p{font-size:1.1rem}.lesson-main .card.ex.rezolvat>.ex-title{background:color-mix(in srgb,var(--ok) 13%,var(--surface));color:var(--ok);border-color:rgb(var(--ok-rgb)/.4)}.lesson-main .card.ex.blocat>.ex-title{background:color-mix(in srgb,var(--bad) 12%,var(--surface));color:var(--bad);border-color:rgb(var(--bad-rgb)/.4)}.lesson-main .card.ex.rezolvat>.ex-title:after{content:" ✓";font:700 1.25rem/0 var(--hand)}.lesson-main .card.ex.blocat>.ex-title:after{content:" !";font:700 1.25rem/0 var(--hand)}.lesson-main .card.ex.blocat,.lesson-main .card.ex.rezolvat{border-left:1px solid var(--hair)}.lesson-main .card.ex.rezolvat{box-shadow:var(--shadow-sm),inset 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var(--sans);letter-spacing:-.03em;color:var(--fg);font-variant-numeric:tabular-nums}.lesson-main .figura{position:relative;margin:28px 0;padding:20px 20px 16px;text-align:left;background:var(--surface);border:1px solid var(--hair);border-radius:var(--radius-sm);box-shadow:var(--shadow-sm)}.lesson-main .figura>div{text-align:center}.lesson-main .figura figcaption{margin-top:12px;padding-top:10px;border-top:1px dotted rgb(var(--fg-rgb)/.28);font:500 .9rem/1.5 var(--sans)}.lesson-main .figuri{gap:14px;margin:28px 0}.lesson-main .figuri .figura{margin:0;padding:12px;box-shadow:none}.lesson-main .card .figura,.lesson-main .rezolvare .figura{margin:16px 0;padding:10px;box-shadow:none;border-style:dashed;border-color:var(--line)}.lesson-main .rezolvare .figura{background:var(--surface)}.figura .katex svg{display:block;position:absolute;margin:0;width:100%;max-width:none;height:inherit;overflow:hidden}.lesson-main .figura>div svg{display:block;margin:0 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a{position:relative;line-height:1.35;padding:7px 12px 7px 14px;margin-left:0;transition:color .16s ease,background-color .16s ease}.sec-nav a.active{margin-left:0;padding-left:14px;border-radius:var(--r-xs);box-shadow:none;font-weight:600;color:var(--fg)}.sec-nav a:before{content:"";position:absolute;left:-8px;top:6px;bottom:6px;width:3px;border-radius:3px;background:var(--accent);opacity:0;transform:scaleY(.35);transition:transform .24s var(--ease-out),opacity .18s ease}.sec-nav a.active:before{opacity:1;transform:none}}@media (min-width:1024px) and (hover:hover) and (pointer:fine){.sec-nav a:hover{background:var(--surface-2);text-decoration:none}}.pager{margin-top:72px;padding-top:26px;border-top:1.5px dotted rgb(var(--fg-rgb)/.3);gap:14px}.pager a{padding:18px 22px 20px;border-radius:var(--radius);box-shadow:var(--shadow-sm);gap:4px;transition:transform .22s var(--ease-out),background-color .16s ease,border-color .16s ease}.pager a span{font:600 .88rem/1.3 var(--sans)}.pager a b{font:700 1.2rem/1.25 var(--sans);letter-spacing:-.02em}.pager .next.primary{border-color:transparent;box-shadow:0 1px 2px rgb(var(--accent-rgb)/.45),0 12px 24px -12px rgb(var(--accent-rgb)/.7)}.pager a:active{transform:scale(.985);transition-duration:.1s}@media (hover:hover) and (pointer:fine){.pager a:hover{transform:translateY(-2px);border-color:var(--hair)}.pager .next.primary:hover{background:rgb(var(--accent-hover-rgb));border-color:transparent}}.pager .next.primary span{color:color-mix(in srgb,var(--on-accent) 82%,transparent)}.menu>summary{border-radius:var(--radius-btn);border-color:var(--hair);box-shadow:var(--key)}.menu-list{background:color-mix(in srgb,var(--surface) 94%,transparent);backdrop-filter:saturate(180%) blur(20px);-webkit-backdrop-filter:saturate(180%) blur(20px);border-color:var(--hair);box-shadow:var(--shadow-lg)}.menu-list button{border-radius:var(--r-xs)}@media (max-width:640px){.menu-list{position:absolute;top:calc(100% + 8px);bottom:auto;left:0;right:auto;width:min(300px,calc(100vw - 2 * var(--gutter)));min-width:0;max-height:none;padding:6px}.sec-head .menu-list{left:auto;right:0}.menu-list button{min-height:44px;font-size:.95rem}}.lec-capitole{margin-top:36px}.cap-card{gap:10px;padding-top:32px}.cap-card b{font-size:1.7rem}.cap-progres{margin-top:auto;padding-top:16px;display:grid;gap:4px;border-top:1px dotted rgb(var(--fg-rgb)/.28)}.cap-progres .bar-label{margin-top:4px;font-family:var(--sans);color:var(--muted)}.toolbar{align-items:center}.legend{gap:6px 18px;font-family:var(--sans)}.legend span:before{width:12px;height:12px;border-radius:50%;border:1.5px solid rgb(var(--fg-rgb)/.35);background:var(--surface);vertical-align:-1px}.legend .l-in:before{border-color:var(--accent);background:linear-gradient(to top,rgb(var(--accent-rgb)/.5) 50%,var(--surface) 50%)}.legend .l-ok:before{border-color:var(--ok);background:rgb(var(--ok-rgb)/.25)}.legend .l-bad:before{border-color:var(--bad);background:rgb(var(--bad-rgb)/.2)}.class-tabs{gap:8px}.class-tabs button{min-height:40px;font-size:.92rem}.class-tabs .n{margin-left:6px;opacity:.65;font-variant-numeric:tabular-nums}.class-section{margin-top:12px}.class-section:first-of-type .class-title{margin-top:1.2rem}.class-title span{border-radius:var(--radius-btn);padding:4px 16px}.group-title{margin:32px 0 16px}.lcard,.lgrid{gap:16px}.lcard{align-items:flex-start;padding:18px 20px 20px;border-color:var(--hair)}.lstatus{font:700 1.6rem/1 var(--hand);width:38px;height:38px;border-radius:50%;border-width:1.5px;padding-bottom:3px;transition:background-color .2s ease,border-color .2s ease}.lcard.in-progres .lstatus{background:linear-gradient(to top,rgb(var(--accent-rgb)/.38) var(--p,40%),var(--surface) var(--p,40%))}.lcard.nou .lstatus{background:var(--surface)}.ltitle{display:block;font-size:1.08rem;text-wrap:balance}.lmeta{display:block;margin:4px 0 12px}.lec-fara{display:inline-block;margin-left:8px;padding:0 8px;border:1px dashed rgb(var(--fg-rgb)/.35);border-radius:var(--radius-btn);font-size:.74rem;line-height:1.6}.cap-card .bar,.lcard .bar{height:8px;border-radius:var(--radius-btn);border-color:var(--hair)}.cap-card .bar>i,.lcard .bar>i{border-radius:var(--radius-btn)}.chips.sticky{gap:8px;border-bottom:1px solid var(--hair);background:var(--glass);backdrop-filter:saturate(180%) blur(20px);-webkit-backdrop-filter:saturate(180%) blur(20px)}.chips a{min-height:40px;display:inline-flex;align-items:center;padding:6px 16px;border-radius:var(--radius-btn);border-color:var(--hair);box-shadow:var(--key);font-size:.92rem;transition:background-color .14s ease,color .14s ease,border-color .14s ease,transform .14s var(--ease-out)}@media (hover:hover) and (pointer:fine){.chips a:hover{background:var(--surface-2)}}.chips a:active{transform:scale(.97)}.fgrup{margin-top:12px}.fgrid{gap:28px;margin-top:8px}.fcard{padding:24px 26px;border-radius:var(--radius)}.fcard header{align-items:center;gap:10px 16px;margin-bottom:18px;padding-bottom:14px;border-bottom:1.5px dotted rgb(var(--fg-rgb)/.3)}.fcard h3{margin:0;font-size:1.4rem;font-weight:700;letter-spacing:-.025em}.fcard-actions{gap:14px}.fcard-link{font-family:var(--sans);font-size:.92rem;font-weight:600;text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:1px}.fcard-body{gap:18px 28px}.fcard-fig{padding:12px;border:1px solid var(--hair);border-radius:var(--radius-sm);background:color-mix(in srgb,var(--surface-2) 55%,var(--surface))}.fcard-fig:empty{display:none}.fcard-body:has(.fcard-fig:empty){grid-template-columns:minmax(0,1fr)}.frow{padding:9px 0;align-items:center}.frow dt{font:500 .95rem/1.4 var(--sans)}.frow dd .katex{font-size:1.15em}.fcard-retine{margin:20px 0 0;padding:14px 20px 14px 40px;font-size:1.02rem;list-style:none;border-radius:var(--radius-sm);background:color-mix(in srgb,var(--mark) 30%,var(--surface));box-shadow:inset 4px 0 0 var(--mark)}:root[data-theme=dark] .fcard-retine{background:color-mix(in srgb,var(--mark) 13%,var(--surface))}.fcard-retine:before{content:"Reține";display:block;margin:0 0 2px -20px;font:700 1.6rem/1.1 var(--hand);color:var(--fg)}.fcard-retine li{position:relative;margin:4px 0}.fcard-retine li:before{content:"–";position:absolute;left:-16px;color:var(--fg);font-weight:700}.fcard .tabel-wrap{margin:20px 0 0}.grade-pick{display:flex;flex-wrap:wrap;align-items:center;gap:8px}.grade-pick-label{margin-right:6px;font:600 .95rem/1 var(--sans);color:var(--muted)}.grade-btn{min-height:40px;padding:6px 16px;font-size:.95rem}.grade-btn[aria-pressed=true],.grade-btn[aria-pressed=true]:hover{background:var(--fg);color:var(--bg);border-color:var(--fg)}.cont-card{align-items:center}.cont-card b{margin:6px 0 2px;font:700 1.5rem/1.2 var(--sans);letter-spacing:-.02em}.demo-note{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:14px 28px;margin:28px 0 32px;padding:18px 24px;border:1.5px dashed rgb(var(--accent-rgb)/.7);border-radius:var(--radius-sm);background:var(--accent-soft)}.demo-note b{display:block;font-size:1.8rem;line-height:1;color:var(--accent)}.demo-note p{margin:6px 0 0;max-width:60ch;font-size:1rem;line-height:1.55}.lec-demo-extra{margin-top:28px}.joc{display:grid;gap:24px;margin-top:32px;max-width:760px}.joc-foaie{position:relative;padding:32px 32px 34px 64px;background:var(--surface);border:1px solid var(--hair);border-radius:var(--radius);box-shadow:var(--shadow)}.joc-foaie:before{content:"";position:absolute;top:0;bottom:0;left:38px;width:3px;border-left:1px solid var(--margin);border-right:1px solid var(--margin)}.joc-h2{margin:0 0 8px;font-size:clamp(1.4rem,3vw,1.9rem);line-height:1.2}.joc-h2 strong{font-weight:750}.joc-grup{margin-top:28px}.joc-grup-cap{display:flex;flex-wrap:wrap;align-items:baseline;justify-content:space-between;gap:6px 14px;margin-bottom:14px;padding-bottom:8px;border-bottom:1.5px dotted rgb(var(--fg-rgb)/.3)}.joc-grup-cap b{font:700 1.1rem/1.3 var(--sans);letter-spacing:-.01em}.joc-grup-cap .lec-link{font-family:var(--sans);font-size:.92rem}.joc-opt{display:flex;flex-wrap:wrap;gap:8px}.joc-fisa{text-align:left;gap:10px;min-height:42px;padding:6px 16px 6px 10px;font-size:.95rem;font-weight:560}.joc-box{flex:none;width:20px;height:20px;display:grid;place-items:center;border:1.5px solid rgb(var(--fg-rgb)/.45);border-radius:50%;background:var(--surface);color:var(--accent);font:700 1.35rem/0 var(--hand);padding-bottom:3px;transition:background-color .14s ease,border-color .14s ease}.joc-fisa[aria-pressed=true]{border-color:rgb(var(--accent-rgb)/.6);background:var(--accent-soft)}.joc-fisa[aria-pressed=true]:hover{background:color-mix(in srgb,var(--accent) 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