:root{--bg:#f7f8fa;--surface:#fff;--ink:#111827;--muted:#64748b;--line:#e2e8f0;--accent:#111827;--soft:#eef2f7;--max:1380px}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--ink);font-family:Inter,ui-sans-serif,system-ui,-apple-system,"Segoe UI",sans-serif;line-height:1.6}
a{color:inherit;text-decoration:none}button{font:inherit}.topbar{position:sticky;top:0;z-index:20;height:70px;background:rgba(255,255,255,.95);backdrop-filter:blur(12px);border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:0 24px}
.brand{font-weight:800;letter-spacing:.08em}.brand span{color:var(--muted)}.top-actions{display:flex;gap:10px}.icon-btn,.ghost-btn,.primary,.secondary{border:1px solid var(--line);border-radius:12px;padding:10px 16px;background:var(--surface);cursor:pointer}.primary{background:var(--accent);color:#fff;border-color:var(--accent)}.icon-btn{width:44px;height:44px;padding:0}
.container{max-width:var(--max);margin:auto;padding:54px 28px}.hero-site{padding:78px 0 60px}.hero-site h1{font-size:clamp(46px,7vw,86px);line-height:.98;margin:14px 0;letter-spacing:-.04em}.hero-site p{font-size:20px;max-width:780px;color:var(--muted)}
.eyebrow{text-transform:uppercase;letter-spacing:.14em;font-size:12px;font-weight:800;color:#64748b}.grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}.card{background:var(--surface);border:1px solid var(--line);border-radius:18px;padding:24px;transition:.18s transform,.18s box-shadow}.card:hover{transform:translateY(-2px);box-shadow:0 12px 35px rgba(15,23,42,.08)}
.chapter-card{min-height:190px;display:flex;flex-direction:column;justify-content:space-between}.chapter-card h3{font-size:26px;line-height:1.15;margin:10px 0}.meta{color:var(--muted);font-size:14px}.section-title{display:flex;align-items:end;justify-content:space-between;gap:20px;margin:20px 0}.section-title h2{font-size:34px;margin:0}
.progress-wrap{background:var(--soft);border-radius:99px;height:9px;overflow:hidden}.progress-wrap i{display:block;height:100%;width:0;background:var(--accent);transition:width .25s}.site-layout{display:grid;grid-template-columns:300px minmax(0,1fr);min-height:calc(100vh - 70px)}
.site-sidebar{border-right:1px solid var(--line);background:var(--surface);padding:26px 18px;position:sticky;top:70px;height:calc(100vh - 70px);overflow:auto}.site-sidebar h2{font-size:20px;margin:8px 0}.nav-list{display:grid;gap:4px;margin-top:22px}.nav-list a{padding:10px 12px;border-radius:10px;color:#334155;font-size:14px}.nav-list a:hover{background:var(--soft)}
.lesson-main{padding:48px clamp(22px,5vw,72px);max-width:1100px}.lesson-head{padding:18px 0 36px}.lesson-head h1{font-size:clamp(40px,6vw,72px);line-height:1.03;margin:12px 0}.lesson-head p{color:var(--muted);font-size:18px}.lesson-section{padding:42px 0;border-top:1px solid var(--line)}.lesson-section h2{font-size:30px;margin-top:0}.callout{padding:18px 20px;border:1px solid var(--line);background:var(--soft);border-radius:14px}.empty{padding:42px;border:1px dashed var(--line);border-radius:18px;color:var(--muted)}
footer{border-top:1px solid var(--line);padding:28px;color:var(--muted)}.dark{--bg:#0f172a;--surface:#111827;--ink:#f8fafc;--muted:#94a3b8;--line:#263244;--accent:#f8fafc;--soft:#182235}.dark .topbar{background:rgba(15,23,42,.95)}.dark .primary{color:#0f172a}
@media(max-width:850px){.grid{grid-template-columns:1fr}.site-layout{display:block}.site-sidebar{position:relative;top:0;height:auto;border-right:0;border-bottom:1px solid var(--line)}.lesson-main{padding:30px 20px}.topbar{padding:0 14px}.ghost-btn{display:none}}

/* v3 — lesson navigation/progress */
.lesson-nav-home{display:grid;gap:7px;margin:0 0 18px;padding:0 0 14px;border-bottom:1px solid var(--line)}
.lesson-nav-home a{display:block;padding:10px 12px;border:1px solid var(--line);border-radius:10px;background:var(--surface);font-size:14px;font-weight:650}
.lesson-nav-home a:hover{background:var(--soft)}
.lesson-progress{margin:14px 0 0}
.lesson-progress .progress-wrap{height:8px}
.lesson-progress-label{display:flex;justify-content:space-between;gap:10px;font-size:12px;color:var(--muted);margin-bottom:7px}
.nav-list a.active{background:var(--soft);font-weight:700}
@media(max-width:850px){.lesson-nav-home{display:flex;overflow:auto}.lesson-nav-home a{white-space:nowrap}}

/* Canonical lesson shell v6 — shared across all lessons */
.lesson-shell{display:grid;grid-template-columns:300px minmax(0,1fr);min-height:calc(100vh - 70px)}
.lesson-shell .site-sidebar{position:sticky;top:70px;height:calc(100vh - 70px);overflow:auto;padding:28px 18px;border-right:1px solid var(--line);background:var(--surface)}
.lesson-shell .site-sidebar h2{font-size:24px;line-height:1.08;margin:12px 0 16px}
.lesson-nav-home{display:flex;flex-direction:column;gap:9px;margin:16px 0 18px}
.lesson-nav-home a{display:block;padding:13px 14px;border:1px solid var(--line);border-radius:12px;font-weight:700;text-decoration:none;color:var(--ink);background:var(--surface)}
.lesson-nav-home a:hover{background:var(--soft)}
.lesson-shell .lesson-main{min-width:0;max-width:none;padding:0}
.lesson-shell .lesson-content{max-width:980px;margin:0 auto;padding:0 28px 80px}
.lesson-hero{background:#101827;color:#f8fafc;padding:82px 7vw 74px;min-height:430px;display:flex;flex-direction:column;justify-content:center}
.lesson-hero .eyebrow{color:#aab6c9}
.lesson-hero h1{font-size:clamp(46px,6vw,82px);line-height:.98;letter-spacing:-.045em;max-width:1100px;margin:14px 0 22px}
.lesson-hero h1 em{font-style:normal;color:#b8c3d6}
.lesson-hero p{font-size:19px;line-height:1.55;max-width:900px;color:#d7deea;margin:0}
.lesson-hero .hero-flow{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-top:48px}
.lesson-hero .flow-node{border:1px solid #46536a;border-radius:10px;padding:10px 14px;font-size:12px;font-weight:800;letter-spacing:.08em;color:#c8d1df}
.lesson-hero .flow-node.active{background:#fff;color:#101827;border-color:#fff}
@media(max-width:900px){.lesson-shell{grid-template-columns:1fr}.lesson-shell .site-sidebar{position:relative;top:auto;height:auto;border-right:0;border-bottom:1px solid var(--line)}.lesson-hero{padding:56px 28px}.lesson-hero h1{font-size:clamp(42px,10vw,68px)}}

.cards{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}.cards article,.panel,.exercise,.error-grid article,.problem-card,.project,.story,.trace-widget,.complexity{background:#fff;border:1px solid #e2e5e9;border-radius:14px;padding:20px;box-shadow:0 4px 20px rgba(17,24,39,.04)}.cards b{font-size:11px;color:#6b7280}.cards h4{margin:8px 0 5px}.cards p{margin:0;color:#667085;font-size:14px}.checkpoint{display:flex;align-items:center;gap:14px;margin-top:15px;padding:15px;background:#eef1f4;border-radius:12px}.checkpoint>span{font-size:18px}.checkpoint p{margin:0;font-size:14px}.checkpoint button{margin-left:auto;border:0;background:none;text-decoration:underline}.hidden{display:none!important}.pipeline{display:grid;grid-template-columns:repeat(5,1fr);gap:10px}.pipeline article{position:relative;background:#fff;border:1px solid #e2e5e9;border-radius:12px;padding:17px}.pipeline span{display:inline-grid;place-items:center;width:25px;height:25px;border-radius:50%;background:#111827;color:#fff;font-size:11px;font-weight:800}.pipeline h4{margin:10px 0 4px}.pipeline p{font-size:13px;color:#667085;margin:0}.interactive-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:15px;margin-top:15px}.drag-bank{display:flex;flex-wrap:wrap;gap:8px;margin:16px 0}.drag-bank button{border:1px solid #d9dee5;background:#f8fafc;border-radius:9px;padding:8px 10px;font-size:12px}.drop-zones{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}.drop-zone{min-height:115px;border:2px dashed #d6dbe1;border-radius:11px;padding:12px}.drop-zone.over{border-color:#111827;background:#f3f4f6}.drop-zone b{display:block}.drop-zone small{color:#7b8490;font-size:11px}.feedback,.result{min-height:20px;font-size:13px;font-weight:700}.compare{display:grid;grid-template-columns:1fr 1fr;gap:10px}.compare div{background:#f6f7f9;border-radius:10px;padding:13px}.compare p{font-size:13px;margin:4px 0}.tip{padding:15px;background:#f0f2f5;border-left:4px solid #111827;border-radius:8px;font-size:13px;margin-top:15px}.story{display:flex;gap:20px;align-items:center}.story-icon{font-size:42px}.story p{margin:4px 0}.trace-widget{margin-top:15px}.trace-controls{display:flex;align-items:center;gap:20px}.trace-values{display:flex;gap:7px;margin:22px 0}.trace-values span{min-width:45px;text-align:center;padding:9px;border-radius:8px;background:#edf0f3}.trace-values span.current{background:#111827;color:#fff;transform:translateY(-3px)}.code-layout{display:grid;grid-template-columns:1.2fr .8fr;gap:12px}.code,.pseudocode,.solution-code{background:#101418;color:#e8edf2;border-radius:12px;padding:20px;overflow:auto;font:13px/1.7 ui-monospace,SFMono-Regular,Consolas,monospace}.kw{color:#a5b4fc}.run-btn{margin-top:10px;border:0;background:#111827;color:#fff;border-radius:9px;padding:10px 15px}.console{background:#101418;border-radius:12px;color:#cbd5e1;min-height:180px}.console-head{font-size:10px;letter-spacing:.14em;border-bottom:1px solid #29313a;padding:10px 14px;color:#8c98a5}.console pre{padding:15px;white-space:pre-wrap}.mini-question{margin-top:15px;background:#fff;border:1px solid #e2e5e9;border-radius:12px;padding:18px}.mini-question button,.complexity-options button,.match-grid button,.exercise button{border:1px solid #d9dee5;background:#fff;border-radius:8px;padding:8px 10px;margin:4px;font-size:12px}.q-feedback{font-size:13px;font-weight:700}.pseudo-layout{display:grid;grid-template-columns:1fr 1fr;gap:15px}.flowchart{background:#fff;border:1px solid #e2e5e9;border-radius:12px;padding:18px;text-align:center}.flowchart>div{max-width:180px;margin:6px auto;padding:8px;border:1px solid #cdd3da}.flowchart .start{border-radius:99px}.flowchart .decision{border-radius:7px;transform:rotate(0deg)}.branches{display:flex;justify-content:center;gap:8px;font-size:10px}.quiz-order{margin-top:15px}.quiz-order button{border:1px solid #d9dee5;background:#fff;border-radius:8px;padding:9px;margin:4px;font-size:12px}.error-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.error-tag,.tag{font-size:10px;font-weight:900;letter-spacing:.1em;background:#eef0f2;padding:5px 7px;border-radius:5px}.error-grid p{font-size:13px;color:#667085}.warning{margin-top:14px}.problem-card{display:grid;grid-template-columns:1fr 1fr;gap:18px}.problem-card p{font-size:15px}.problem-card ul{font-size:13px;color:#667085}.test-table{margin-top:15px;overflow:auto}table{width:100%;border-collapse:collapse;font-size:13px}th,td{text-align:left;padding:11px;border-bottom:1px solid #e7e9ec}.exercise-list{display:grid;gap:10px}.exercise{display:flex;gap:15px}.exercise>span{font-weight:900;color:#8993a0}.exercise p{margin:0 0 5px}.complexity{margin-bottom:12px}.complexity-options,.match-grid{display:flex;flex-wrap:wrap}.complexity-labels{display:flex;justify-content:space-around;margin-top:10px;font-size:12px;font-weight:800}.quiz{display:grid;gap:12px}.quiz-q{background:#fff;border:1px solid #e2e5e9;border-radius:12px;padding:18px}.quiz-q p{font-weight:800;margin-top:0}.quiz-q label{display:block;padding:7px;font-size:13px}.quiz-q input{margin-right:8px}.quiz-submit{margin-top:8px}.score-card{margin-top:15px;background:#111827;color:#fff;padding:22px;border-radius:12px}.score-card strong{font-size:32px}.project{display:grid;grid-template-columns:1.4fr .6fr;gap:20px}.project li{margin:7px 0;font-size:13px}.rubric div{display:flex;justify-content:space-between;border-bottom:1px solid #e7e9ec;padding:10px 0;font-size:13px}.completion{text-align:center;margin-top:15px;padding:25px;background:#eef0f2;border-radius:12px}.completion .primary{background:#111827;color:#fff;border-color:#111827}.completion strong{display:block;margin-top:12px}.modal{position:fixed;inset:0;background:rgba(0,0,0,.55);z-index:50;display:grid;place-items:center;padding:20px}.modal-card{background:#fff;max-width:620px;width:100%;border-radius:16px;padding:25px;position:relative}.close{position:absolute;right:15px;top:10px;border:0;background:none;font-size:25px}.quick-q{padding:12px 0;border-bottom:1px solid #e5e7eb}.quick-q button{display:block;width:100%;text-align:left;border:1px solid #d9dee5;background:#fff;border-radius:8px;padding:8px;margin:5px 0;font-size:12px}footer{display:flex;justify-content:space-between;padding:25px clamp(24px,6vw,90px);font-size:11px;color:#7b8490}.dark body{}.dark{background:#111827;color:#e5e7eb}.dark .topbar,.dark .sidebar,.dark .cards article,.dark .panel,.dark .exercise,.dark .error-grid article,.dark .problem-card,.dark .project,.dark .story,.dark .trace-widget,.dark .complexity,.dark .mini-question,.dark .flowchart,.dark .modal-card{background:#18212b;border-color:#2d3742}.dark .sidebar{background:#151d26}.dark nav a{color:#aab4bf}.dark nav a:hover,.dark nav a.active{background:#27313c;color:#fff}.dark .ghost-btn,.dark .icon-btn,.dark .secondary,.dark .exercise button,.dark .mini-question button,.dark .quiz-order button,.dark .complexity-options button,.dark .match-grid button,.dark .drag-bank button{background:#18212b;color:#e5e7eb;border-color:#3a4652}.dark .hero{background:#0b1015}.dark .drop-zone{border-color:#3a4652}.dark .tip,.dark .completion,.dark .compare div{background:#222c36}.dark .pipeline article{background:#18212b;border-color:#2d3742}.dark th,.dark td{border-color:#2d3742}.dark .progress{background:#2d3742}.final-score-line{margin-top:15px;font-size:13px;opacity:.85}



/* Feedback vizual pentru elementele deja plasate în exercițiul de clasificare. */
.drag-bank button:disabled{opacity:.55;cursor:default}
.placed-item{font-size:12px;margin-top:8px;padding:6px 8px;background:#f0fdf4;border-radius:7px}
.dark .placed-item{background:#15301f}

/* Faza 1.5 — feedback, accesibilitate și interacțiuni tactile */
button:focus-visible,a:focus-visible,input:focus-visible{outline:3px solid #94a3b8;outline-offset:2px}
.score-box{margin:0 0 22px;padding:12px 10px;border:1px solid #e3e6ea;border-radius:10px;background:#fff}.score-box>div{display:flex;justify-content:space-between;gap:10px;font-size:12px}.score-box small{display:block;margin-top:5px;color:#697586;font-size:11px}.selected{outline:3px solid #94a3b8!important;background:#eef2f7!important}.drop-zone{cursor:pointer}.drop-zone.over,.drop-zone:hover{background:#f3f4f6}.placed-item{border:1px solid #bbf7d0}.quick-q button.correct{background:#dcfce7!important;border-color:#86efac!important}.quick-q button.incorrect{background:#fee2e2!important;border-color:#fca5a5!important}.quick-q button:disabled{cursor:default}.run-btn{min-height:42px}
.dark .score-box{background:#18212b;border-color:#2d3742}.dark .score-box small{color:#aab4bf}.dark .selected{background:#27313c!important}.dark .drop-zone:hover,.dark .drop-zone.over{background:#222c36}.dark .quick-q button.correct{background:#15301f!important;border-color:#3f7f52!important}.dark .quick-q button.incorrect{background:#3b2020!important;border-color:#7f3f3f!important}
@media(max-width:600px){.sidebar{padding:22px 14px}.sidebar nav{scrollbar-width:thin}.sidebar nav a{padding:10px 12px}.drag-bank{display:grid;grid-template-columns:1fr}.drag-bank button{width:100%;min-height:44px}.drop-zone{min-height:100px}.quick-q button{min-height:44px}.quiz-q label{padding:10px 7px}.story-icon{font-size:12px;font-weight:900;letter-spacing:.08em}.top-actions{gap:5px}.icon-btn{padding:8px 10px}}


/* Canonical lesson content layer — shared by L1.1, L1.2 and L1.3 */
.lesson-content .section{padding:62px clamp(24px,6vw,90px);border-bottom:1px solid var(--line)}
.lesson-content .section-head{display:flex;gap:18px;align-items:flex-start;margin-bottom:28px}
.lesson-content .section-head h3{font-size:32px;line-height:1.15;margin:3px 0}
.lesson-content .section-head span{font-size:11px;font-weight:900;letter-spacing:.12em;color:#64748b}
.lesson-content .cards article,.lesson-content .panel,.lesson-content .exercise,.lesson-content .error-grid article,.lesson-content .problem-card,.lesson-content .project,.lesson-content .story,.lesson-content .trace-widget,.lesson-content .complexity,.lesson-content .quiz-q,.lesson-content .flowchart{background:var(--surface);color:var(--ink);border-color:var(--line)}
.lesson-content .section p,.lesson-content .section li{max-width:950px}
.lesson-content .codebox{background:#101418;color:#e8edf2;border-radius:12px;padding:20px;overflow:auto;font:13px/1.7 ui-monospace,SFMono-Regular,Consolas,monospace}
.lesson-content .result{color:var(--ink)}
.dark .lesson-content .cards article,.dark .lesson-content .panel,.dark .lesson-content .exercise,.dark .lesson-content .error-grid article,.dark .lesson-content .problem-card,.dark .lesson-content .project,.dark .lesson-content .story,.dark .lesson-content .trace-widget,.dark .lesson-content .complexity,.dark .lesson-content .quiz-q,.dark .lesson-content .flowchart{background:var(--surface);color:var(--ink);border-color:var(--line)}
@media(max-width:900px){.lesson-content .section{padding:46px 28px}.lesson-content .cards,.lesson-content .pipeline{grid-template-columns:1fr 1fr}.lesson-content .interactive-grid,.lesson-content .code-layout,.lesson-content .pseudo-layout,.lesson-content .problem-card,.lesson-content .project{grid-template-columns:1fr}.lesson-content .drop-zones,.lesson-content .error-grid{grid-template-columns:1fr}}
@media(max-width:600px){.lesson-content .cards,.lesson-content .pipeline{grid-template-columns:1fr}.lesson-content .section{padding:42px 18px}.lesson-content .section-head h3{font-size:27px}}

/* v8 QA fixes: canonical lesson navigation and interactive controls */
.lesson-shell #nav{display:grid;gap:4px;margin-top:4px}
.lesson-shell #nav a{display:block;padding:10px 12px;border-radius:10px;line-height:1.35;color:var(--ink);font-size:14px}
.lesson-shell #nav a:hover,.lesson-shell #nav a.active{background:var(--soft);color:var(--ink)}
.lesson-shell .lesson-progress{margin:0 0 18px}
.lesson-shell .lesson-progress-label{display:flex;justify-content:space-between;gap:10px;margin-bottom:7px;font-size:12px;color:var(--muted)}
.lesson-shell .lesson-progress-label strong{color:var(--ink)}
.lesson-shell .progress{background:var(--soft);height:9px;border-radius:99px;overflow:hidden}
.lesson-shell .progress i{display:block;height:100%;width:0;background:var(--accent);transition:width .2s}
.dark .lesson-shell #nav a{color:var(--ink)}
.dark .lesson-shell #nav a:hover,.dark .lesson-shell #nav a.active{background:var(--soft)}
@media(max-width:900px){.lesson-shell{grid-template-columns:1fr}.lesson-shell .site-sidebar{position:relative;top:auto;height:auto;max-height:none}.lesson-shell #nav{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:600px){.lesson-shell #nav{grid-template-columns:1fr}.lesson-nav-home a{padding:11px 12px}}


/* L3 CANONICAL DESIGN — applied to all lesson pages */
.lesson-shell{display:grid;grid-template-columns:300px minmax(0,1fr);min-height:calc(100vh - 70px);width:100%;max-width:none;margin:0}
.lesson-shell .site-sidebar{position:sticky;top:70px;height:calc(100vh - 70px);overflow:auto;padding:28px 18px;border-right:1px solid var(--line);background:var(--surface)}
.lesson-shell .lesson-main{min-width:0;width:100%;max-width:none;padding:0;margin:0}
.lesson-hero{width:100%;max-width:none;box-sizing:border-box;background:#101827;color:#f8fafc;padding:82px 7vw 74px;min-height:430px;display:flex;flex-direction:column;justify-content:center}
.lesson-hero .eyebrow{color:#aab6c9}
.lesson-hero h1{font-size:clamp(46px,6vw,82px);line-height:.98;letter-spacing:-.045em;max-width:1100px;margin:14px 0 22px}
.lesson-hero h1 em{font-style:normal;color:#b8c3d6}
.lesson-hero p{font-size:19px;line-height:1.55;max-width:900px;color:#d7deea;margin:0}
.lesson-hero .hero-flow{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-top:48px}
.lesson-hero .flow-node{border:1px solid #46536a;border-radius:10px;padding:10px 14px;font-size:12px;font-weight:800;letter-spacing:.08em;color:#c8d1df}
.lesson-hero .flow-node.active{background:#fff;color:#101827;border-color:#fff}
.lesson-content{max-width:980px;margin:0 auto;padding:0 28px 80px}
.lesson-content .section{padding:62px 0;border-bottom:1px solid var(--line)}
.lesson-content .section-head{display:flex;gap:18px;align-items:flex-start;margin-bottom:28px}
.lesson-content .section-head>.num{flex:0 0 auto;font-size:12px;font-weight:900;background:#111827;color:#fff;border-radius:7px;padding:5px 7px;line-height:1.4}
.lesson-content .section-head>div{min-width:0}
.lesson-content .section-head .eyebrow{display:block;font-size:11px;font-weight:900;letter-spacing:.12em;color:#64748b}
.lesson-content .section-head h3{font-size:32px;line-height:1.15;margin:3px 0}
.lesson-content .quiz-submit{display:inline-block;margin-top:12px;border:1px solid var(--accent);border-radius:10px;padding:11px 17px;background:var(--accent);color:#fff;cursor:pointer;font-weight:700}
.lesson-content .quiz-submit:hover{opacity:.92}
.lesson-content .result{margin-top:10px;min-height:20px}
@media(max-width:900px){.lesson-shell{grid-template-columns:1fr}.lesson-shell .site-sidebar{position:relative;top:auto;height:auto;border-right:0;border-bottom:1px solid var(--line)}.lesson-hero{padding:56px 28px}.lesson-hero h1{font-size:clamp(42px,10vw,68px)}.lesson-content{max-width:none;padding:0 28px 60px}.lesson-content .section{padding:46px 0}}
@media(max-width:600px){.lesson-content{padding:0 18px 50px}.lesson-content .section{padding:42px 0}.lesson-content .section-head h3{font-size:27px}}

/* v10 QA: quiz layout, cumulative progress and spacing fixes */
.quiz-panel{display:block!important}
.quiz-panel .quiz{display:grid;grid-template-columns:1fr;gap:12px}
.quiz-panel .quiz-submit{display:inline-block!important;width:max-content!important;max-width:100%;margin-top:12px;align-self:auto;flex:none}
.lesson-content .quiz-submit{justify-self:start}
.lesson-content .codebox + .codebox{margin-top:10px}
.global-progress-box{margin:0 0 22px;padding:12px 10px;border:1px solid var(--line);border-radius:10px;background:var(--surface)}
.global-progress-box .progress-wrap{height:7px}
.global-progress-box .progress-wrap i{display:block;height:100%;width:0;background:var(--accent);transition:width .2s}
.global-progress-box .lesson-progress-label{margin-bottom:7px}
.lesson-shell .site-sidebar .global-progress-box + #nav{margin-top:4px}
.quiz-panel .result{margin-top:10px}
button:disabled{cursor:default}