:root{--bg:#f6f7fb;--card:#fff;--text:#1c2333;--muted:#5b6478;--line:#e3e6ef;--primary:#2f4fc4;--primary-dark:#22399a;--primary-soft:#e8edff;--cours:#2563eb;--cours-soft:#e7efff;--exo:#15803d;--exo-soft:#e4f6ea;--quiz:#c2410c;--quiz-soft:#fff0e6;--video:#be185d;--video-soft:#fde8f1;--ok:#15803d;--ok-soft:#e4f6ea;--bad:#b91c1c;--bad-soft:#fdeaea;--warn:#92400e;--warn-soft:#fff5db;--radius:16px;--shadow:0 1px 2px #141e3c0f, 0 2px 8px #141e3c0d;--nav-h:64px;--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light}*{box-sizing:border-box}html{-webkit-text-size-adjust:100%}body{background:var(--bg);color:var(--text);margin:0;font-family:system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Noto Sans,Ubuntu,Cantarell,Helvetica Neue,Noto Sans Arabic,Arial,sans-serif;font-size:17px;line-height:1.55}img{max-width:100%;height:auto}a{color:var(--primary)}button,input,select,textarea{font:inherit;color:inherit}:focus-visible{outline-offset:2px;border-radius:6px;outline:3px solid #f59e0b}.sr-only{clip:rect(0 0 0 0);white-space:nowrap;width:1px;height:1px;position:absolute;overflow:hidden}.skip{z-index:100;background:#fff;padding:8px 12px;position:absolute;top:8px;left:-999px}.skip:focus{left:8px}.app{flex-direction:column;min-height:100dvh;display:flex}.topbar{z-index:20;background:var(--primary);color:#fff;padding:10px 16px;padding-top:max(10px, env(safe-area-inset-top));align-items:center;gap:10px;display:flex;position:-webkit-sticky;position:sticky;top:0}.topbar a{color:#fff;text-decoration:none}.brand{align-items:center;gap:10px;min-width:0;font-size:17px;font-weight:800;line-height:1.15;display:flex}.brand small{opacity:.85;font-size:12px;font-weight:500;display:block}.topbar .spacer{flex:1}.icon-btn{width:44px;height:44px;color:inherit;cursor:pointer;background:#ffffff24;border:0;border-radius:12px;justify-content:center;align-items:center;display:inline-flex}.main{width:100%;max-width:760px;padding:16px 16px calc(var(--nav-h) + 28px);flex:1;margin:0 auto}.offline-bar{background:var(--warn-soft);color:var(--warn);text-align:center;justify-content:center;align-items:center;gap:8px;padding:8px 16px;font-size:14px;display:flex}.demo-bar{color:#7a5b00;background:#fff7d6;border-radius:10px;align-items:center;gap:6px;margin-bottom:12px;padding:6px 12px;font-size:13px;display:flex}.bottomnav{z-index:30;border-top:1px solid var(--line);height:calc(var(--nav-h) + env(safe-area-inset-bottom));padding-bottom:env(safe-area-inset-bottom);background:#fff;grid-template-columns:repeat(5,1fr);display:grid;position:fixed;bottom:0;left:0;right:0}.bottomnav a{color:var(--muted);flex-direction:column;justify-content:center;align-items:center;gap:2px;min-width:0;font-size:12px;font-weight:600;text-decoration:none;display:flex}.bottomnav a .lvl{color:#fff;opacity:.55;border-radius:8px;place-items:center;width:30px;height:26px;font-size:14px;font-weight:800;display:grid}.bottomnav a.active{color:var(--primary)}.bottomnav a.active .lvl{opacity:1;outline-offset:1px;outline:2px solid}.bottomnav a .badge{background:var(--quiz);color:#fff;border-radius:99px;padding:0 6px;font-size:11px;position:absolute;transform:translate(12px,-14px)}h1{margin:6px 0 12px;font-size:26px;line-height:1.2}h2{margin:22px 0 10px;font-size:21px;line-height:1.25}h3{margin:18px 0 8px;font-size:18px}.muted{color:var(--muted)}.small{font-size:14px}.card{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow);border:1px solid #edf0f6;margin-bottom:14px;padding:16px}.stack>*+*{margin-top:12px}.row{flex-wrap:wrap;align-items:center;gap:10px;display:flex}.grow{flex:1;min-width:0}.center{text-align:center}.btn{background:var(--primary);color:#fff;cursor:pointer;text-align:center;border:2px solid #0000;border-radius:12px;justify-content:center;align-items:center;gap:8px;min-height:48px;padding:10px 18px;font-size:16px;font-weight:700;line-height:1.2;text-decoration:none;display:inline-flex}.btn:hover{background:var(--primary-dark)}.btn:disabled{opacity:.55;cursor:not-allowed}.btn.secondary{color:var(--primary);background:#fff;border-color:#c8d2f5}.btn.secondary:hover{background:var(--primary-soft)}.btn.ghost{color:var(--primary);background:0 0;border-color:#0000}.btn.danger{color:var(--bad);background:#fff;border-color:#f2c4c4}.btn.ok{background:var(--ok)}.btn.small{border-radius:10px;min-height:38px;padding:6px 12px;font-size:14px}.btn.block{width:100%}.chip{background:var(--primary-soft);color:var(--primary);border-radius:99px;align-items:center;gap:4px;padding:2px 10px;font-size:13px;font-weight:700;display:inline-flex}.chip.ok{background:var(--ok-soft);color:var(--ok)}.chip.bad{background:var(--bad-soft);color:var(--bad)}.chip.warn{background:var(--warn-soft);color:var(--warn)}.chip.grey{color:var(--muted);background:#eef0f5}.notice{border-radius:12px;align-items:flex-start;gap:10px;padding:12px 14px;font-size:15px;display:flex}.notice.info{background:var(--primary-soft);color:#20357f}.notice.ok{background:var(--ok-soft);color:#0f5a2b}.notice.bad{background:var(--bad-soft);color:#7f1414}.notice.warn{background:var(--warn-soft);color:var(--warn)}.notice svg{flex:none;margin-top:2px}label.field{margin-bottom:12px;font-size:15px;font-weight:700;display:block}label.field>span.hint{color:var(--muted);font-size:13px;font-weight:400;display:block}.input,select.input,textarea.input{background:#fff;border:2px solid #d5dae6;border-radius:12px;width:100%;min-height:48px;margin-top:6px;padding:12px 14px;font-size:16px;display:block}textarea.input{resize:vertical;min-height:110px;line-height:1.5}.input:focus{border-color:var(--primary);outline:none;box-shadow:0 0 0 3px #c9d4ff}.hero{color:#fff;background:linear-gradient(135deg,#2f4fc4,#4f6fe6);border-radius:20px;margin-bottom:18px;padding:20px}.hero h1{margin:0 0 6px;font-size:24px}.hero p{opacity:.95;margin:0}.levels{gap:14px;display:grid}.level-card{color:var(--text);box-shadow:var(--shadow);background:#fff;border:2px solid #0000;border-radius:20px;align-items:center;gap:16px;min-height:96px;padding:18px;text-decoration:none;display:flex}.level-card:hover{border-color:currentColor}.level-card:focus-visible{border-color:currentColor}.level-num{color:#fff;text-align:center;border-radius:18px;flex:none;place-items:center;width:64px;height:64px;font-size:26px;font-weight:900;line-height:1;display:grid}.level-num small{letter-spacing:.5px;font-size:11px;font-weight:700;display:block}.level-card .t{font-size:21px;font-weight:800}.level-card .mine{font-size:12px}.list-links a{color:var(--text);border-top:1px solid var(--line);align-items:center;gap:12px;padding:12px 0;text-decoration:none;display:flex}.list-links a:first-child{border-top:0}.level-head{color:#fff;border-radius:20px;margin-bottom:16px;padding:18px}.level-head h1{margin:0}.unit{margin-bottom:18px}.unit-title{text-transform:uppercase;letter-spacing:.4px;color:var(--muted);margin:8px 4px;font-size:15px;font-weight:800}.lesson-link{color:var(--text);box-shadow:var(--shadow);background:#fff;border-radius:16px;align-items:center;gap:14px;min-height:72px;margin-bottom:10px;padding:14px;text-decoration:none;display:flex}.lesson-link .n{border-radius:12px;flex:none;place-items:center;width:44px;height:44px;font-weight:900;display:grid}.lesson-link .t{font-size:17px;font-weight:800;line-height:1.3}.lesson-link .s{color:var(--muted);font-size:14px;line-height:1.35}.parts{flex-wrap:wrap;gap:6px;margin-top:6px;display:flex}.part-dot{border-radius:99px;padding:1px 8px;font-size:12px;font-weight:700}.crumbs{color:var(--muted);flex-wrap:wrap;align-items:center;gap:6px;font-size:14px;display:flex}.crumbs a{color:var(--muted)}.tabs{z-index:10;background:var(--bg);grid-template-columns:repeat(4,1fr);gap:6px;margin:0 0 12px;padding:8px 0;display:grid;position:-webkit-sticky;position:sticky;top:64px}.tab{cursor:pointer;box-shadow:var(--shadow);background:#fff;border:2px solid #0000;border-radius:14px;flex-direction:column;justify-content:center;align-items:center;gap:2px;min-height:62px;padding:8px 4px;font-size:14px;font-weight:800;text-decoration:none;display:flex}.tab.cours{color:var(--cours)}.tab.exercices{color:var(--exo)}.tab.quiz{color:var(--quiz)}.tab.video{color:var(--video)}.tab[aria-selected=true].cours{background:var(--cours);color:#fff}.tab[aria-selected=true].exercices{background:var(--exo);color:#fff}.tab[aria-selected=true].quiz{background:var(--quiz);color:#fff}.tab[aria-selected=true].video{background:var(--video);color:#fff}.tab .count{opacity:.8;font-size:11px;font-weight:700}.section-title{align-items:center;gap:10px;margin:6px 0 12px;font-size:21px;font-weight:900;display:flex}.objectives{background:var(--cours-soft);border-radius:14px;padding:12px 14px}.objectives h2{color:var(--cours);margin:0 0 6px;font-size:16px}.objectives ul{margin:0;padding-left:20px}.ar{text-align:right;direction:rtl;background:#f3f7ee;border-radius:14px;padding:12px 16px;font-size:18px;line-height:1.8}.ar h2{color:#3f6212;margin:0 0 6px;font-size:17px}.pager{grid-template-columns:1fr 1fr;gap:10px;margin-top:20px;display:grid}.pager a{color:var(--text);box-shadow:var(--shadow);background:#fff;border-radius:14px;padding:12px;font-size:14px;text-decoration:none}.pager a b{font-size:15px;display:block}.pager .next{text-align:right}.understood{grid-template-columns:1fr 1fr;gap:10px;display:grid}.understood button[aria-pressed=true].yes{background:var(--ok);color:#fff;border-color:var(--ok)}.understood button[aria-pressed=true].no{background:var(--warn);color:#fff;border-color:var(--warn)}.md{font-size:17px}.md p{margin:0 0 12px}.md .md-h1{color:#9f1239;font-size:22px}.md .md-h2{color:#9f1239;margin:22px 0 8px;font-size:20px}.md .md-h3{margin:18px 0 6px;font-size:18px}.md ul,.md ol{margin:0 0 12px;padding-left:22px}.md li{margin:4px 0}.md .kw{border-bottom:2px solid;font-weight:800}.md .md-note{background:#fff8e1;border-left:5px solid #f59e0b;border-radius:10px;margin:0 0 14px;padding:10px 14px}.md .md-note p:last-child{margin-bottom:0}.md .md-figure{text-align:center;margin:10px 0 16px}.md .md-figure img{border:1px solid var(--line);background:#fff;border-radius:12px}.md figcaption{color:var(--muted);margin-top:4px;font-size:14px}.md .md-img-inline{vertical-align:middle;max-height:1.6em}.md-table-wrap{border:1px solid var(--line);border-radius:12px;margin:0 0 14px;overflow-x:auto}.md-table{border-collapse:collapse;background:#fff;width:100%;font-size:15px}.md-table th{text-align:left;background:#eef2ff}.md-table th,.md-table td{border-bottom:1px solid var(--line);vertical-align:top;padding:8px 10px}.md code{background:#eef0f5;border-radius:6px;padding:1px 6px;font-size:.95em}.md hr{border:0;border-top:2px dashed var(--line);margin:18px 0}.q{box-shadow:var(--shadow);background:#fff;border:2px solid #0000;border-radius:16px;margin-bottom:14px;padding:16px}.q.right{border-color:#9ad9ae}.q.wrong{border-color:#f1b1b1}.q.partial{border-color:#f3d28a}.q-head{align-items:flex-start;gap:10px;margin-bottom:10px;display:flex}.q-num{color:#fff;border-radius:10px;flex:none;place-items:center;width:30px;height:30px;font-size:15px;font-weight:900;display:grid}.q-prompt{font-size:17px;font-weight:700}.q-pts{color:var(--muted);font-size:12px;font-weight:600}.q img.q-img{border:1px solid var(--line);border-radius:10px;margin:6px 0 10px}.choice{text-align:left;cursor:pointer;background:#f7f8fc;border:2px solid #e1e5f0;border-radius:12px;align-items:center;gap:12px;width:100%;min-height:52px;margin-bottom:8px;padding:12px 14px;font-size:16px;display:flex}.choice .mark{background:#fff;border:2px solid #9aa3b8;border-radius:50%;flex:none;place-items:center;width:24px;height:24px;display:grid}.choice.square .mark{border-radius:6px}.choice[aria-checked=true],.choice[aria-pressed=true]{border-color:var(--primary);background:var(--primary-soft)}.choice[aria-checked=true] .mark,.choice[aria-pressed=true] .mark{border-color:var(--primary);background:var(--primary);color:#fff}.choice.is-correct{border-color:var(--ok);background:var(--ok-soft)}.choice.is-wrong{border-color:var(--bad);background:var(--bad-soft)}.choice:disabled{cursor:default}.tf{grid-template-columns:1fr 1fr;gap:10px;display:grid}.tf .choice{justify-content:center;font-weight:800}.match-row{background:#f7f8fc;border-radius:12px;grid-template-columns:1fr;gap:6px;margin-bottom:8px;padding:10px;display:grid}.match-row .left{font-weight:700}@media (min-width:560px){.match-row{grid-template-columns:1fr 1.2fr;align-items:center}}.order-item{background:#f7f8fc;border:2px solid #e1e5f0;border-radius:12px;align-items:center;gap:8px;margin-bottom:8px;padding:8px 8px 8px 12px;display:flex}.order-item .pos{color:var(--muted);width:22px;font-weight:900}.order-item .txt{flex:1}.order-item button{cursor:pointer;background:#fff;border:2px solid #d5dae6;border-radius:10px;place-items:center;width:42px;height:42px;display:grid}.order-item button:disabled{opacity:.35}.fill-text{font-size:17px;line-height:2.4}.fill-text input{background:#fff;border:2px dashed #9aa3b8;border-radius:10px;width:auto;min-width:110px;max-width:100%;min-height:40px;margin:0 4px;padding:4px 10px;font-weight:700;display:inline-block}.fill-text input.is-correct{border:2px solid var(--ok);background:var(--ok-soft)}.fill-text input.is-wrong{border:2px solid var(--bad);background:var(--bad-soft)}.bank{flex-wrap:wrap;gap:6px;margin:8px 0;display:flex}.bank .chip{color:var(--text);background:#eef0f5;padding:4px 12px;font-size:15px}.feedback{border-radius:12px;margin-top:10px;padding:10px 12px;font-size:15px}.feedback.right{background:var(--ok-soft);color:#0f5a2b}.feedback.wrong{background:var(--bad-soft);color:#7f1414}.feedback.partial{background:var(--warn-soft);color:var(--warn)}.score-big{font-size:44px;font-weight:900;line-height:1}.progress{background:#e7eaf3;border-radius:99px;height:10px;overflow:hidden}.progress>i{background:var(--ok);border-radius:99px;height:100%;display:block}.timer{z-index:9;border:2px solid var(--quiz);color:var(--quiz);background:#fff;border-radius:99px;align-items:center;gap:6px;padding:4px 12px;font-weight:800;display:inline-flex;position:-webkit-sticky;position:sticky;top:132px}.timer.low{background:var(--bad);color:#fff;border-color:var(--bad)}.logo-wrap{gap:10px;display:grid}.logo-canvas{aspect-ratio:1;border:2px solid var(--line);touch-action:manipulation;background:#fff;border-radius:14px;width:100%;max-height:340px}.code{min-height:90px;font-family:ui-monospace,Cascadia Mono,Consolas,monospace;font-size:16px}.video-box{aspect-ratio:16/9;color:#fff;background:#111827;border-radius:16px;place-items:center;display:grid;position:relative;overflow:hidden}.video-box iframe,.video-box video{border:0;width:100%;height:100%;position:absolute;top:0;bottom:0;left:0;right:0}.video-start{text-align:center;flex-direction:column;align-items:center;gap:10px;padding:16px;display:flex}.video-start .play{background:var(--video);color:#fff;cursor:pointer;border:0;border-radius:50%;place-items:center;width:72px;height:72px;display:grid}.table-wrap{overflow-x:auto}table.data{border-collapse:collapse;background:#fff;width:100%;font-size:15px}table.data th,table.data td{border-bottom:1px solid var(--line);text-align:left;white-space:nowrap;padding:8px 10px}table.data th{color:var(--muted);text-transform:uppercase;letter-spacing:.3px;font-size:13px}.toast{left:50%;bottom:calc(var(--nav-h) + 16px);z-index:50;color:#fff;background:#1c2333;border-radius:12px;max-width:calc(100% - 32px);padding:12px 18px;font-size:15px;position:fixed;transform:translate(-50%);box-shadow:0 6px 20px #00000040}.spinner{border:3px solid #d5dae6;border-top-color:var(--primary);border-radius:50%;width:28px;height:28px;margin:24px auto;animation:.9s linear infinite spin}@keyframes spin{to{transform:rotate(360deg)}}@media (prefers-reduced-motion:reduce){.spinner{animation-duration:3s}}.empty{text-align:center;color:var(--muted);padding:24px 12px}@media (min-width:900px){.main{padding-bottom:40px}}@media print{.topbar,.bottomnav,.tabs,.no-print,.offline-bar{display:none!important}body{background:#fff}.card,.q,.lesson-link{box-shadow:none;border:1px solid #ccc}.main{padding:0}}.input.is-correct{border-color:var(--ok);background:var(--ok-soft)}.input.is-wrong{border-color:var(--bad);background:var(--bad-soft)}