:root{color-scheme:dark;--bg:#07111f;--card:#101f32;--line:#253d55;--text:#eaf5ff;--muted:#a6bed0;--green:#51daf0;--blue:#65b8ff}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:radial-gradient(ellipse at 80% 0%,#143a40,transparent 44%),var(--bg);color:var(--text);font:16px/1.7 system-ui,-apple-system,sans-serif}a{color:inherit;text-decoration:none}button,select{font:inherit}button{cursor:pointer}button:focus-visible,a:focus-visible,select:focus-visible{outline:3px solid var(--green);outline-offset:3px}.topbar{position:sticky;top:0;z-index:10;background:#081521ed;backdrop-filter:blur(16px);border-bottom:1px solid var(--line)}.nav{max-width:1200px;margin:auto;padding:14px 22px;display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap}.brand{font-weight:900;font-size:1.28rem;letter-spacing:-.5px}.brand span{color:var(--green)}.links{display:flex;gap:8px;flex-wrap:wrap}.links button,.ghost{border:1px solid var(--line);background:#162737;color:var(--text);padding:9px 14px;border-radius:11px}.links button:hover,.ghost:hover{border-color:var(--green)}.wrap{max-width:1160px;margin:0 auto;padding:26px 22px 75px}.hero{display:grid;grid-template-columns:1.6fr .75fr;gap:30px;align-items:center;padding:52px 0 40px}.eyebrow{font-size:.78rem;font-weight:800;letter-spacing:.17em;color:var(--green);text-transform:uppercase}h1{font-size:clamp(2.2rem,5vw,4.4rem);line-height:1.13;letter-spacing:-.04em;margin:10px 0 18px}h2{font-size:clamp(1.5rem,3vw,2rem);line-height:1.25;letter-spacing:-.025em}h3{margin:8px 0}p{color:var(--muted)}.lead{font-size:1.13rem;max-width:740px}.hero-art{width:100%;max-height:280px;filter:drop-shadow(0 12px 42px #35c7ef2a)}.actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:24px}.primary{background:var(--green);color:#061b20;border:0;border-radius:12px;padding:12px 19px;font-weight:800}.primary:hover{background:#a5f3ff}.card{background:linear-gradient(145deg,#142b3b,#0d1b2b);border:1px solid var(--line);border-radius:18px;padding:22px;box-shadow:0 14px 50px #0002}.card:hover{border-color:#3a7087}.grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:17px}.card img{height:100px;width:100%;object-fit:contain;margin-bottom:8px}.card h3{font-size:1.15rem}.card p{margin:5px 0 13px}.pill{display:inline-block;border-radius:99px;border:1px solid #325c6f;color:var(--green);padding:3px 10px;font-size:.76rem;font-weight:800}.section-head{display:flex;justify-content:space-between;align-items:end;gap:10px;margin:34px 0 18px}.section-head h2{margin:0}.lesson-hero{display:grid;grid-template-columns:1fr 150px;gap:18px;align-items:center}.lesson-hero img{width:100%}.content{max-width:880px}.content section,.lesson-card,.explanation{background:#112237;border:1px solid var(--line);border-radius:16px;padding:24px;margin:17px 0}.content h2,.lesson-card h2{margin-top:0}.content h4{color:var(--green);font-size:1.08rem;margin-bottom:4px}.content p,.lesson-card p{color:#c4d7df}.content .activity,.content .beginner,.content .callout,.lesson-card .example{border-left:4px solid var(--green);padding:12px 18px;background:#193344;border-radius:8px;margin:17px 0}.content .panel{box-shadow:none}.toolbar{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;margin:12px 0 25px}.ad{border:1px dashed #547082;border-radius:12px;padding:14px;color:#a3b6c4;text-align:center;font-size:.81rem;min-height:70px;margin:26px 0}.quiz-box{max-width:780px}.quiz-opt{display:block;width:100%;margin:10px 0;padding:14px;text-align:left;background:#162e40;color:var(--text);border:1px solid var(--line);border-radius:11px}.quiz-opt:hover:not(:disabled){border-color:var(--green)}.quiz-opt.good{border-color:#4fe2f0;background:#173c43}.quiz-opt.bad{border-color:#ff8390;background:#49212e}.feedback{border:1px solid #3d7684;background:#162d37;padding:18px;border-radius:12px;margin-top:18px}.field{padding:10px;background:#142638;color:var(--text);border:1px solid var(--line);border-radius:10px;width:100%;margin:5px 0 17px}.quiz-controls{display:grid;grid-template-columns:1fr 1fr;gap:20px}.muted{color:var(--muted)}.hidden,[hidden]{display:none!important}.plans{display:grid;grid-template-columns:1fr 1fr;gap:18px}.price{font-size:1.6rem;color:var(--green);font-weight:bold}.progress{background:#294153;border-radius:99px;height:9px;overflow:hidden}.progress>div{height:100%;background:var(--green);width:0}.footer{border-top:1px solid var(--line);text-align:center;padding:28px;font-size:.85rem;color:var(--muted)}.lock{border:1px solid #bd9855;padding:20px;background:#362e23;border-radius:15px}.note{background:#132b35;border-left:4px solid var(--green);padding:14px;border-radius:10px}.badge{font-size:.8rem;color:var(--green)}@media(max-width:750px){.hero{grid-template-columns:1fr}.hero-art{height:170px}.grid{grid-template-columns:1fr 1fr}.plans,.quiz-controls{grid-template-columns:1fr}}@media(max-width:480px){.grid{grid-template-columns:1fr}.lesson-hero{grid-template-columns:1fr 95px}.nav{padding:12px}.links button{font-size:.83rem;padding:7px 9px}.wrap{padding:18px 14px 50px}}

/* Design fidèle à CodeNova original, adapté à l’application complète */
body{background:radial-gradient(ellipse at 77% 4%,#132a3b 0%,transparent 36%),#07111f}
.topbar{background:#07111ff2;border-bottom:1px solid var(--line)}
.brand{color:var(--green);letter-spacing:0;font-size:1.24rem}
.brand:before{content:'⬡ ';color:var(--green)}
.nav{max-width:1150px;padding:12px 22px}
.links button{background:transparent;border-color:transparent;border-radius:8px}
.links button:hover{background:#182c3c;border-color:#31515e}
.hero{grid-template-columns:1.4fr 1fr;min-height:380px;padding:65px 0 40px}
h1{font-size:clamp(2.4rem,6vw,4.8rem);line-height:1.08}
.card{background:#101f32;box-shadow:0 8px 28px #0002;border-radius:16px}
.card:hover{border-color:#51daf0;transform:translateY(-2px);transition:transform .18s,border-color .18s}
.pill{background:#1b3242;border:0;color:#8ce9f6}
.primary{border-radius:10px;background:var(--green);color:#03141a}
.ghost{background:#203a50;color:var(--text)}
.eyebrow{letter-spacing:.13em}
.lesson-hero{border-bottom:1px solid var(--line);margin-bottom:22px;padding-bottom:20px}
.content section,.lesson-card,.explanation{background:#0c1a2a}
.content .activity,.content .beginner,.content .callout,.lesson-card .example{background:#102b35}
.hero-art{filter:drop-shadow(0 0 32px #32c6e43a)}
@media(max-width:750px){.hero{grid-template-columns:1fr;min-height:unset;padding:35px 0}.hero-art{height:200px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}

/* Cours Premium approfondis */
.premium-intro{background:linear-gradient(145deg,#102b35,#0c1d31);border:1px solid #325d69;border-radius:20px;padding:28px;margin:20px 0 26px}.premium-intro h2{font-size:clamp(1.65rem,4vw,2.6rem);margin:12px 0}.premium-intro p{color:#c5dae0}.lesson-metrics{display:flex;flex-wrap:wrap;gap:10px;margin:19px 0}.lesson-metrics span{border:1px solid #3c5f76;border-radius:99px;padding:5px 12px;background:#153b40;color:#b8f1fc;font-size:.86rem}.premium-toc{margin-top:16px;padding:18px 22px;background:#091a28;border:1px solid #31535a;border-radius:13px}.premium-toc ol{columns:2;margin-bottom:0;padding-left:22px;color:#cee0e7}.premium-toc li{break-inside:avoid;margin-bottom:5px}.premium-deep{padding:29px!important}.premium-deep h2{color:#e9faff}.premium-deep h3{font-size:1.06rem;color:#79dbe9;margin:16px 0 8px}.lesson-detail p{line-height:1.9}.practice{background:#172f43;border:1px solid #31576a;border-radius:13px;padding:17px 19px;margin:20px 0}.practice strong{color:#e3f9ff}.practice summary{color:#7efaff;font-weight:800;cursor:pointer;padding:8px 0}.practice details[open]{border-top:1px solid #345668;margin-top:12px}.recap{background:#112f3d;border-left:4px solid #51daf0;padding:13px 18px;border-radius:10px}.recap p{margin:3px 0;color:#d2f2f5}.source-links a{color:#76dcff;text-decoration:underline;text-underline-offset:3px}.source-links li{margin:8px 0}@media(max-width:650px){.premium-toc ol{columns:1}.premium-deep{padding:19px!important}.premium-intro{padding:20px}}

.pricing-grid{grid-template-columns:repeat(3,minmax(0,1fr));align-items:stretch}.pricing-grid .card{display:flex;flex-direction:column;gap:10px}.pricing-grid .card .primary{margin-top:auto}.highlighted-plan{border-color:var(--green);box-shadow:0 0 35px #51daf020}.pricing-note{margin-top:22px}@media(max-width:850px){.pricing-grid{grid-template-columns:1fr}}

/* CodeNova • direction artistique 2026 */
:root{--bg:#060e19;--card:#101f30;--line:#2b4259;--text:#f0f8ff;--muted:#b8c8d6;--green:#54d0ef;--blue:#75b9ff}
body{background:radial-gradient(ellipse 70% 38% at 100% 0%,#153b51 0%,transparent 78%),radial-gradient(ellipse 55% 24% at 0% 28%,#12273455,transparent 80%),#060e19}
.topbar{background:#06121de8;box-shadow:0 8px 34px #01091146}
.brand{font-size:1.28rem;letter-spacing:-.035em;color:#f2feff}.brand span{color:#54d0ef}.brand:before{color:#54d0ef}
.links button{font-weight:650;transition:background .2s,color .2s}.links button:hover{color:var(--green);background:#153448}
.wrap{max-width:1200px}
.hero{min-height:500px;grid-template-columns:1.12fr .9fr;gap:46px;padding:62px 0 65px}
.hero h1{font-weight:850;letter-spacing:-.055em;font-size:clamp(2.8rem,5.8vw,5.2rem)}
.hero .lead{font-size:1.12rem;line-height:1.85;max-width:590px}
.gradient-text{background:linear-gradient(105deg,#5bdbf4 10%,#8ee7f9 88%);color:transparent;-webkit-background-clip:text;background-clip:text}
.hero-media{position:relative;border-radius:25px;min-height:405px;overflow:visible}
.hero-photo{width:100%;height:100%;min-height:405px;position:absolute;inset:0;object-fit:cover;object-position:center;border-radius:25px;border:1px solid #497e8f;box-shadow:0 26px 90px #0008,0 0 65px #39b6e620;filter:saturate(.85) contrast(1.12)}
.hero-media:after{content:'';pointer-events:none;position:absolute;inset:0;border-radius:25px;background:linear-gradient(0deg,#061827bd,transparent 60%)}
.floating-note{position:absolute;bottom:18px;left:16px;right:16px;z-index:1;background:#081723dd;border:1px solid #7adeef77;padding:13px 16px;border-radius:14px;backdrop-filter:blur(14px);font-weight:700;font-size:.85rem;color:#eafcff}
.status-dot{display:inline-block;width:8px;height:8px;border-radius:50%;background:var(--green);margin-right:7px;box-shadow:0 0 14px #54d0ef}
.hero-proof{display:flex;flex-wrap:wrap;gap:12px;margin-top:32px}
.hero-proof span{border:1px solid #335b61;background:#102a34a3;padding:10px 14px;border-radius:13px;font-size:.82rem;color:#cee1ea}
.hero-proof strong{color:#6ce3fa;font-size:1.1rem;margin-right:5px}
.eyebrow{color:#86ddff;font-size:.75rem;letter-spacing:.1em}
.primary{background:linear-gradient(100deg,#55d0ee,#65a8df);color:#041927;border:1px solid #62d5ff;border-radius:12px;box-shadow:0 10px 24px #23a6c917;transition:filter .2s,transform .2s}
.primary:hover{filter:brightness(1.12);transform:translateY(-1px)}
.ghost{background:#142a3c;border:1px solid #3d6074;border-radius:12px;transition:background .2s}.ghost:hover{background:#1b4051}
.section-head{margin:46px 0 21px}.section-head h2{font-size:clamp(1.55rem,3vw,2.25rem)}
.grid{gap:20px}
.course-card{padding:0;overflow:hidden;display:flex;flex-direction:column;transition:transform .25s,border-color .25s,box-shadow .25s;background:#0d1c2a}
.course-card:hover{transform:translateY(-6px);box-shadow:0 22px 48px #020b1888;border-color:#5dd2ed}
.course-cover{height:172px;position:relative;overflow:hidden;background:#163044}
.course-card .course-cover img{width:100%;height:100%;object-fit:cover;margin:0;display:block;filter:saturate(.8) contrast(1.12);transition:transform .35s}
.course-card:hover .course-cover img{transform:scale(1.07)}
.course-overlay{position:absolute;top:12px;right:12px;padding:5px 10px;border:1px solid #9df2fb7f;border-radius:50px;background:#0a1b25d9;backdrop-filter:blur(10px);color:#c8faff;font-size:.72rem;font-weight:760}
.course-card-inner{padding:23px;display:flex;flex-direction:column;align-items:start;flex:1}
.course-card h3{margin:13px 0 7px;line-height:1.35;font-size:1.17rem}
.course-card p{line-height:1.65;font-size:.92rem;flex:1}
.course-card .primary{margin-top:12px}
.lesson-hero img{width:165px;height:150px;object-fit:cover;border-radius:17px;border:1px solid #386475}
.plans .card{position:relative}.highlighted-plan{background:linear-gradient(145deg,#10253a,#122437);box-shadow:0 15px 55px #0eb6e91a;border:1px solid #62d0ef}
.pricing-grid .card{padding:27px}.pricing-grid .card h2{font-size:1.45rem}
.card{border-color:#2b4154}.card:hover{border-color:#57b8d7}
.ad{background:#0c1a2690}.footer{background:#081622;border-color:#294158}
@media(max-width:850px){.hero{gap:26px;grid-template-columns:1fr 1fr}.hero-media,.hero-photo{min-height:340px}}
@media(max-width:720px){.hero{grid-template-columns:1fr;padding:32px 0 36px}.hero-media,.hero-photo{height:275px;min-height:275px}.hero h1{font-size:clamp(2.35rem,8.6vw,3.5rem)}.course-cover{height:145px}.lesson-hero img{width:110px;height:100px}}
@media(max-width:480px){.course-cover{height:180px}.hero-proof span{padding:9px 11px}.hero-media,.hero-photo{height:240px;min-height:240px}}

/* Académie Pro : offres rassurantes, sans affirmations de sécurité non vérifiées */
.pricing-header{text-align:center;max-width:860px;margin:20px auto 35px}.pricing-header h1{font-size:clamp(2rem,4.2vw,3.7rem);letter-spacing:-.05em;line-height:1.09}.pricing-header .lead{margin:20px auto;max-width:740px}.trust-line{display:flex;gap:13px;justify-content:center;flex-wrap:wrap;margin-top:25px}.trust-line span{border:1px solid #365c67;background:#102a36;padding:9px 13px;border-radius:99px;font-size:.78rem;color:#ccdde9}.pricing-v2{margin-top:36px;gap:19px}.plan-v2{border:1px solid #38556b;border-radius:21px;padding:28px!important;position:relative;background:linear-gradient(155deg,#122637,#0c1828);box-shadow:0 22px 48px #020b1948}.plan-v2.featured{border:2px solid #52d1ee;box-shadow:0 22px 60px #079bc724;background:linear-gradient(155deg,#123242,#122b3c 55%,#0a1c2b)}.plan-top{display:flex;justify-content:space-between;align-items:center}.plan-symbol{display:grid;place-items:center;border:1px solid #4b678b;background:#1b3a44;color:#81e9f9;border-radius:15px;width:51px;height:51px;font-size:1.65rem}.plan-v2 h2{margin:16px 0 0}.plan-sub{min-height:74px;color:#c3d8e1}.plan-v2 .price{font-size:1.18rem;font-weight:800;min-height:40px;color:#eafbff}.plan-rule{border-top:1px solid #385568;margin:8px 0 3px}.plan-v2 ul{list-style:none;padding:0;margin:0 0 17px}.plan-v2 li{margin:12px 0;color:#d8e2ec}.plan-v2 li:before{content:'✓';color:#6be6f5;font-weight:900;margin-right:10px}.plan-v2 .primary{width:100%;margin-top:auto;min-height:49px}.plan-v2 small{color:#b4c1d1;margin-top:5px}.plan-ribbon{position:absolute;right:12px;top:-17px;background:#60dbf2;color:#062732;border-radius:99px;padding:8px 12px;font-size:.74rem;font-weight:850}.secure-explainer{display:grid;grid-template-columns:1.5fr 1fr;gap:22px;padding:28px;margin-top:32px;border-radius:20px;background:#102639}.secure-explainer p{line-height:1.7}.security-steps{display:grid;gap:12px;align-content:center}.security-steps div{border:1px solid #315866;background:#0a1c2b;border-radius:12px;padding:14px}.security-steps strong{color:#5edcf4;margin-right:12px}.faq-pricing{margin-top:24px;padding:26px;border-radius:20px}.faq-pricing details{padding:14px 2px;border-bottom:1px solid #355269}.faq-pricing summary{cursor:pointer;font-weight:700}.faq-pricing p{line-height:1.75}.deep-dive{background:#112d36;border:1px solid #375170;border-radius:14px;padding:20px;margin-top:22px}.deep-dive h3{color:#7ee5f9}.deep-dive p{line-height:1.8}@media(max-width:850px){.secure-explainer{grid-template-columns:1fr}.plan-sub{min-height:0}}@media(max-width:560px){.plan-v2{padding:20px!important}.trust-line span{width:100%;text-align:center}}

/* AdSense – annonces clairement identifiées, jamais mêlées aux boutons de cours. */
.ad-space{margin:32px auto;max-width:900px;min-height:128px;padding:18px 22px;border:1px dashed #43677b;border-radius:16px;background:linear-gradient(120deg,#101f2e,#102a32);text-align:center;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px;color:#d2e6ec}
.ad-space .ad-label{font:700 .68rem/1.1 system-ui,sans-serif;letter-spacing:.14em;color:#b4cbd4}
.ad-space p{margin:0;font-weight:650}
.ad-space small{font-size:.75rem;color:#97b6c2}
.ad-space:has(.adsbygoogle){padding:10px;min-height:96px}
@media(max-width:600px){.ad-space{margin:23px 0;min-height:110px}}

/* Affichage des prix des trois offres Premium */
.price-period{font-size:.43em;font-weight:650;color:var(--muted,#93a5b5);white-space:nowrap;vertical-align:middle}

/* Emplacements publicitaires — blocs identifiables, discrets et responsives */
.ad-space{display:flex;flex-direction:row;align-items:center;justify-content:flex-start;gap:18px;text-align:left;min-height:112px;padding:20px 24px;background:linear-gradient(105deg,#0d1c2b 0%,#102c35 100%);border:1px solid #31566a;box-shadow:0 12px 34px #0002}
.ad-placeholder-mark{width:48px;height:48px;flex:0 0 48px;display:grid;place-items:center;border-radius:14px;background:#15283b;border:1px solid #3d6276;color:#7ee3f1;font-size:.8rem;font-weight:900;letter-spacing:.08em}
.ad-placeholder-copy{min-width:0;flex:1}
.ad-space .ad-label{display:inline-block;margin-bottom:3px;padding:3px 8px;border-radius:99px;background:#173447;color:#9fc8d7;font-size:.65rem}
.ad-space p{font-weight:750;color:#edf9ff;margin:0 0 3px}
.ad-space small{display:block;line-height:1.5;color:#a7bdc9}
.ad-space:has(.adsbygoogle){display:block;text-align:center;background:transparent;border-color:transparent;box-shadow:none;min-height:100px}
.ad-space:has(.adsbygoogle) .ad-placeholder-mark,.ad-space:has(.adsbygoogle) .ad-placeholder-copy{display:none}
@media(max-width:560px){.ad-space{padding:15px;gap:12px}.ad-placeholder-mark{width:40px;height:40px;flex-basis:40px}.ad-space small{font-size:.72rem}}

/* ===== Conversion : accueil, passerelles Premium, leçon d’essai ===== */
.hero-note{font-size:.84rem;color:var(--muted);margin:14px 0 0}
.nav-cta{background:linear-gradient(100deg,#55d0ee,#65a8df)!important;color:#041927!important;border-color:#62d5ff!important;font-weight:800!important}
.nav-cta:hover{filter:brightness(1.1)}
.steps{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}
.step{position:relative;padding-top:30px}.step-n{position:absolute;top:-16px;left:20px;width:34px;height:34px;border-radius:50%;background:var(--green);color:#041927;font-weight:900;display:grid;place-items:center;box-shadow:0 8px 20px #23a6c933}
.step h3{margin-top:4px}
.card-meta{font-size:.78rem!important;color:#8fb3c6!important;flex:0!important;margin:0 0 4px!important}
.course-card .progress{width:100%;margin:6px 0 8px}
.compare{margin:44px 0 10px}.table-wrap{overflow-x:auto}
.compare table{width:100%;border-collapse:collapse;font-size:.95rem}
.compare th,.compare td{padding:12px 14px;border-bottom:1px solid var(--line);text-align:center}
.compare th:first-child,.compare td:first-child{text-align:left}
.compare thead th{color:var(--green);font-size:.8rem;letter-spacing:.08em;text-transform:uppercase}
.compare td:nth-child(3){background:#112f3d33;color:#c9f8ff;font-weight:700}
.outcomes-home{margin-top:20px}.outcome ul{padding-left:18px;margin:8px 0;color:#c4d7df}.outcome li{margin:6px 0}
.final-cta{text-align:center;margin:40px 0;padding:34px 22px;background:linear-gradient(145deg,#123242,#122b3c 60%,#0a1c2b);border-color:#52d1ee}
.final-cta .actions{justify-content:center}
.quick{max-width:880px;margin:0 0 18px;border-color:#3a7087}.quick ul{margin:8px 0 0;padding-left:20px;color:#d2f2f5}.quick li{margin:5px 0}
.pitfall{border-left:4px solid #e8b44f!important}.pitfall h2,.pitfall h4{color:#ffd78a!important}
.mini-quiz,.vocab,.bridge{margin:18px 0}
.mini-q{margin:22px 0}.mini-q h3{font-size:1.05rem}
.vocab dl{display:grid;grid-template-columns:max-content 1fr;gap:8px 18px;margin:8px 0 0}.vocab dt{color:var(--green);font-weight:800}.vocab dd{margin:0;color:#c4d7df}
.bridge{max-width:880px;border:1px solid #bd9855;background:linear-gradient(145deg,#2b2a24,#10202f)}
.bridge .pill{border:1px solid #bd9855;background:#3a2f1c;color:#ffd78a}
.lock-list{padding-left:0;list-style:none;margin:14px 0;display:grid;grid-template-columns:1fr 1fr;gap:6px 18px}
.lock-list li{padding:7px 10px;border-radius:9px;background:#0c1a2a99;color:#c4d7df;font-size:.93rem}
.lock-list li.hl{background:#3a2f1c;color:#ffe4b0;border:1px solid #bd985566}.lock-list em{font-size:.8rem;color:#ffd78a}
.bridge-points{display:flex;flex-wrap:wrap;gap:8px;margin:10px 0 4px}.bridge-points span{border:1px solid #3c5f76;background:#153b40;color:#b8f1fc;border-radius:99px;padding:5px 12px;font-size:.82rem}
.cta-bar{position:fixed;left:50%;bottom:16px;transform:translateX(-50%);z-index:20;width:min(760px,calc(100% - 24px));display:flex;gap:14px;align-items:center;justify-content:space-between;background:#07182af2;border:1px solid #62d5ff;border-radius:16px;padding:12px 16px;box-shadow:0 18px 50px #000a;backdrop-filter:blur(14px)}
.cta-bar p{margin:0;color:#e9faff;font-size:.92rem;line-height:1.4}.cta-bar-actions{display:flex;gap:8px;flex-shrink:0}.cta-bar .ghost{padding:9px 12px}
.module-card{display:flex;flex-direction:column;gap:6px}.module-card details{margin:8px 0}.module-card summary{cursor:pointer;color:var(--green);font-weight:700}
.module-card .primary,.module-card .ghost{margin-top:auto;align-self:flex-start}
.outcomes-list{padding-left:18px;margin:8px 0;color:#c4d7df;font-size:.93rem}.outcomes-list li{margin:4px 0}
.module-footer{max-width:880px;margin:20px 0}.module-footer .progress{margin:12px 0}
.price-equiv{font-size:.86rem;color:#b8f1fc!important;margin:2px 0 4px}
.plan-ribbon.alt{background:#2c3f66;color:#dbe8ff}
.inside{margin:26px 0}.inside-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;margin:14px 0}
.inside-grid div{background:#0c1a2a;border:1px solid var(--line);border-radius:13px;padding:14px}.inside-grid p{margin:4px 0 0;font-size:.9rem}
/* Contenu Premium enrichi */
.outcomes{margin:16px 0;padding:16px 20px;background:#0c2a30;border:1px solid #314a6a;border-radius:13px}.outcomes ul{margin:8px 0 0;padding-left:20px;color:#d2f2f5}.outcomes li{margin:5px 0}
.minicase{background:#172f43;border:1px solid #31576a;border-radius:13px;padding:14px 18px;margin:8px 0 16px}.minicase summary{color:#7efaff;font-weight:800;cursor:pointer;padding:6px 0}
.check-list{list-style:none;padding:0;margin:8px 0 2px}.check-list li{margin:7px 0}.check-list label{cursor:pointer;color:#d2f2f5}.check-list input{margin-right:8px;accent-color:#51daf0;transform:scale(1.15)}
.project-card{border-color:#bd9855!important}.project-card ol{color:#c4d7df}.project-card li{margin:7px 0}
.memo-card ul{color:#c4d7df}.memo-card li{margin:6px 0}.gloss-card dl{display:grid;grid-template-columns:max-content 1fr;gap:8px 18px}.gloss-card dt{color:var(--green);font-weight:800}.gloss-card dd{margin:0;color:#c4d7df}
@media(max-width:750px){.steps,.inside-grid,.lock-list{grid-template-columns:1fr}.cta-bar{flex-direction:column;align-items:stretch;bottom:10px}.cta-bar-actions{justify-content:space-between}.vocab dl,.gloss-card dl{grid-template-columns:1fr}.step{margin-top:14px}}
@media print{.topbar,.footer,.cta-bar,.toolbar,.no-print,.ad,.module-footer,.hero-art{display:none!important}body{background:#fff!important;color:#000!important}.content section,.lesson-card,.card{background:#fff!important;color:#000!important;border-color:#999!important;box-shadow:none!important}p,li,dd,dt,h1,h2,h3,h4,.lead{color:#000!important}}

/* ===== Identité visuelle 2026 : néon bleu / cyan / violet (logo) ===== */
:root{--neon:#22e5ff;--neon2:#2f7bff;--violet:#7b4dff;--bg:#030712;--card:#0c1730;--line:#1f3555;--green:#3fe0ff;--blue:#4d8dff}
body{background:radial-gradient(ellipse 60% 40% at 90% -5%,#2a3fd455,transparent 70%),radial-gradient(ellipse 50% 35% at 0% 30%,#0b8fb533,transparent 75%),radial-gradient(ellipse 40% 30% at 60% 100%,#6a3df022,transparent 70%),#030712}
body:before{content:'';position:fixed;inset:0;z-index:-1;pointer-events:none;background-image:linear-gradient(#1c3a6a14 1px,transparent 1px),linear-gradient(90deg,#1c3a6a14 1px,transparent 1px);background-size:46px 46px;-webkit-mask-image:radial-gradient(ellipse at 50% 20%,#000 20%,transparent 75%);mask-image:radial-gradient(ellipse at 50% 20%,#000 20%,transparent 75%)}
.topbar{background:#030a18ee;border-bottom:1px solid #1d4a7a;box-shadow:0 1px 0 #22e5ff22,0 10px 40px #02061499}
.brand{display:flex;align-items:center;gap:11px;font-size:1.3rem}.brand:before{content:none!important}
.brand-logo{width:40px;height:40px;border-radius:50%;box-shadow:0 0 0 1px #22e5ff55,0 0 18px #2f7bff66}
.brand-text{font-weight:850;letter-spacing:-.03em;color:#f2fbff}.brand-text span{background:linear-gradient(100deg,#22e5ff,#6d8bff 70%,#9a6bff);-webkit-background-clip:text;background-clip:text;color:transparent}
.links button:hover{color:#22e5ff;background:#0d2347}
.nav-cta{background:linear-gradient(100deg,#22e5ff,#2f7bff 70%,#7b4dff)!important;color:#fff!important;border:0!important;box-shadow:0 8px 24px #2f7bff55}
.primary{background:linear-gradient(100deg,#22e5ff,#2f7bff 65%,#6d4dff);color:#fff;border:0;text-shadow:0 1px 2px #0006;box-shadow:0 10px 28px #2f7bff44,inset 0 1px 0 #ffffff44}
.primary:hover{filter:brightness(1.14);transform:translateY(-2px);box-shadow:0 14px 36px #22e5ff44}
.ghost{background:#0b1b38;border:1px solid #2a5384}.ghost:hover{background:#12305a;border-color:#22e5ff}
.gradient-text{background:linear-gradient(100deg,#22e5ff 5%,#4d8dff 55%,#9a6bff 100%);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-media{min-height:0;display:grid;place-items:center}.hero-media:after{content:none}
.hero-logo{position:relative;width:min(100%,430px);height:auto;aspect-ratio:1;border-radius:50%;object-fit:cover;-webkit-mask-image:radial-gradient(circle,#000 62%,transparent 71%);mask-image:radial-gradient(circle,#000 62%,transparent 71%);filter:drop-shadow(0 0 38px #2f7bff88);animation:float 7s ease-in-out infinite}
.hero-media:before{content:'';position:absolute;width:78%;aspect-ratio:1;border-radius:50%;background:radial-gradient(circle,#22e5ff33,#6d4dff22 45%,transparent 70%);filter:blur(30px);animation:pulse 5s ease-in-out infinite}
.floating-note{position:relative;left:auto;right:auto;bottom:auto;margin-top:-22px;border-color:#22e5ff66;background:#050f22e0}
@keyframes float{50%{transform:translateY(-12px)}}@keyframes pulse{50%{opacity:.55;transform:scale(1.08)}}
.status-dot{background:#22e5ff;box-shadow:0 0 14px #22e5ff}.eyebrow{color:#5fe9ff}
.card{background:linear-gradient(160deg,#0f1f3f,#09132a);border-color:#1f3a63}
.card:hover,.course-card:hover{border-color:#22e5ff;box-shadow:0 18px 50px #02061499,0 0 28px #22e5ff22}
.course-card{background:#09132a}
.pill{background:#10294f;color:#7fe9ff}
.section-head h2{position:relative;padding-left:16px}.section-head h2:before{content:'';position:absolute;left:0;top:.18em;bottom:.18em;width:5px;border-radius:5px;background:linear-gradient(#22e5ff,#7b4dff)}
.hero-proof span{background:#0a1d3ca8;border-color:#245086}.hero-proof strong{color:#22e5ff}
.step-n{background:linear-gradient(135deg,#22e5ff,#6d4dff);color:#fff}
.compare thead th{color:#22e5ff}.compare td:nth-child(3){background:#12306066;color:#d6f6ff}
.final-cta{background:linear-gradient(145deg,#0f2f6a,#16224d 55%,#1d1a52);border-color:#4d8dff}
.plan-v2.featured{border-color:#22e5ff;background:linear-gradient(155deg,#0f3563,#101f45 55%,#14173d);box-shadow:0 22px 70px #2f7bff33}
.quiz-opt:hover:not(:disabled){border-color:#22e5ff}.quiz-opt{background:#0d1e3d}
.progress>div{background:linear-gradient(90deg,#22e5ff,#7b4dff)}
.cta-bar{border-color:#22e5ff;background:#050f22f2}
.footer{background:#030a18;border-color:#1d3556}.footer-logo{width:44px;height:44px;border-radius:50%;margin-bottom:6px;box-shadow:0 0 18px #2f7bff66}
::selection{background:#2f7bff;color:#fff}
@media(max-width:720px){.hero-logo{width:min(78%,300px)}.brand{font-size:1.15rem}.brand-logo{width:34px;height:34px}}
@media(prefers-reduced-motion:reduce){.hero-logo,.hero-media:before{animation:none}}
.hero h1{font-size:clamp(2.3rem,4.7vw,4.1rem);line-height:1.1}

.nav-course-link{display:inline-flex;align-items:center;color:#91eaff;text-decoration:none;font-weight:800;padding:10px 12px;border-radius:12px}.nav-course-link:hover,.nav-course-link:focus-visible{background:#19334a;outline:2px solid #66dcff}

/* CodeNova — harmonisation visuelle et accessibilité */
:root{color-scheme:dark;--cn-accent:#78e5f5;--cn-line:#35536d}
html{scroll-behavior:smooth;scroll-padding-top:90px}
button,a{transition:background-color .18s ease,border-color .18s ease,transform .18s ease}
:where(a,button,input):focus-visible{outline:3px solid #a8efff;outline-offset:4px}
.learning-path{box-shadow:0 18px 60px #0003;position:relative;overflow:hidden}
.learning-path h1{font-size:clamp(1.65rem,3.8vw,2.65rem);line-height:1.14;letter-spacing:-.03em}
.learning-path>a,.learning-path a{transition:transform .2s,border-color .2s,background .2s}
.learning-path a:hover{transform:translateY(-3px);border-color:#8beaff!important;background:#294965!important}
.learning-page{background:radial-gradient(ellipse at 15% 0%,#17314d 0%,transparent 45%),#0b1425;color:#eef5ff;font-family:system-ui,sans-serif}
.learning-page header{position:sticky;top:0;z-index:5;backdrop-filter:blur(16px);background:#14233be8}
.learning-page .card{box-shadow:0 10px 35px #0002;transition:transform .2s,border-color .2s}
.learning-page .card:hover{border-color:#5b86a9}
.learning-page .grid>.card:hover{transform:translateY(-3px)}
.learning-page button:hover:not(:disabled){filter:brightness(1.12)}
.learning-page .quiz-opt{min-height:48px}
.learning-page #lesson{scroll-margin-top:100px}
@media(max-width:680px){.learning-page main{padding:18px 14px}.learning-page header{padding:14px}.learning-page .card{padding:16px}.learning-path{margin:14px!important;padding:17px!important}.learning-page .grid{grid-template-columns:1fr}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{transition:none!important;animation:none!important}}

/* Navigation CodeNova — liens accessibles et adaptatifs */
.learning-page .cn-course-header{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:14px max(16px,calc((100% - 1100px)/2));background:#12233c;border-bottom:1px solid #385477;position:relative;z-index:5}
.learning-page .cn-course-header a{display:inline-flex;align-items:center;justify-content:center;gap:9px;min-height:44px;padding:10px 16px;border-radius:13px;text-decoration:none;font-weight:750;transition:background .18s,transform .18s,box-shadow .18s,border-color .18s}
.learning-page .cn-back{color:#ecf7ff;background:#203753;border:1px solid #527394}
.learning-page .cn-back:hover{background:#304b6c;transform:translateY(-2px)}
.learning-page .cn-premium{color:#061a2b;background:linear-gradient(120deg,#81e6ff,#b9f5ff);border:1px solid #c8f6ff;box-shadow:0 4px 17px #00c7ff30}
.learning-page .cn-premium:hover{background:linear-gradient(120deg,#b5f4ff,#e3fcff);transform:translateY(-2px);box-shadow:0 7px 24px #00c7ff48}
.learning-page .cn-course-title{text-align:center;font-size:clamp(12px,1.7vw,16px);color:#dce9f9}
.learning-page a:focus-visible,.learning-page button:focus-visible,.topbar a:focus-visible,.topbar button:focus-visible{outline:3px solid #ffe28b;outline-offset:3px}
.topbar .brand{border-radius:12px;padding:6px 10px;transition:background .18s,transform .18s}
.topbar .brand:hover{background:#1b3450;transform:translateY(-2px)}
.topbar .links button,.topbar .links a{min-height:42px;border-radius:11px;transition:transform .18s,background .18s,box-shadow .18s}
.topbar .links button:hover,.topbar .links a:hover{transform:translateY(-2px)}
@media(max-width:620px){.learning-page .cn-course-header{display:grid;grid-template-columns:1fr 1fr;gap:9px}.learning-page .cn-course-title{grid-column:1/-1;grid-row:2;text-align:center}.learning-page .cn-course-header a{padding:9px 10px;font-size:13px}.learning-page .cn-premium{white-space:nowrap}}
@media(prefers-reduced-motion:reduce){.learning-page .cn-course-header a,.topbar .brand,.topbar .links button,.topbar .links a{transition:none}}

/* Les deux blocs de présentation restent uniquement sur l’accueil. */
.math-home-banner[hidden], #parcours-codenova[hidden] { display: none !important; }

/* Mathématiques et leçons */
body.maths-page{margin:0;background:#0b1425;color:#ecf5ff;font-family:system-ui,-apple-system,sans-serif;line-height:1.55} .maths-page *{box-sizing:border-box}.math-nav{position:sticky;top:0;z-index:50;display:flex;align-items:center;justify-content:space-between;gap:15px;padding:14px max(20px,calc((100% - 1120px)/2));background:#101e33ee;border-bottom:1px solid #314762;backdrop-filter:blur(14px)}.math-nav nav{display:flex;gap:14px;align-items:center;flex-wrap:wrap}.math-nav a{text-decoration:none;color:#cfeaff;font-weight:700}.math-brand{display:inline-flex;gap:8px;align-items:center;font-size:19px}.math-brand span{color:#7adfff}.math-nav .math-premium{background:linear-gradient(110deg,#69dcff,#a6baff);padding:10px 16px;border-radius:12px;color:#08162a;box-shadow:0 4px 22px #36c9ff33}.math-nav a:hover,.math-link:hover{filter:brightness(1.15)}.maths-page main{max-width:1120px;padding:25px 20px 70px;margin:auto}.math-hero{padding:48px 30px;border-radius:24px;background:radial-gradient(circle at 90% 10%,#214e78 0%,transparent 45%),linear-gradient(140deg,#1c3656,#102037);border:1px solid #355777}.math-eyebrow{font-size:12px;font-weight:800;letter-spacing:.12em;color:#7bdbff}.math-hero h1{font-size:clamp(32px,5vw,58px);line-height:1.12;max-width:800px;margin:12px 0}.math-hero em{font-style:normal;color:#7adfff}.math-hero p{max-width:680px;color:#c4d3e4;font-size:18px}.math-stats{display:flex;gap:12px;flex-wrap:wrap;margin-top:26px}.math-stats span{padding:8px 14px;background:#ffffff12;border:1px solid #ffffff25;border-radius:30px;font-weight:700}.math-heading{display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap;margin:35px 0 16px}.math-heading h2{font-size:clamp(24px,3vw,33px);margin:0}.math-heading p{color:#afc3d9;margin:6px 0}.math-levels{display:grid;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));gap:12px}.math-level{background:#172942;color:#eaf5ff;border:1px solid #3b5471;border-radius:16px;padding:18px;text-align:left;cursor:pointer;display:grid;gap:9px;transition:transform .2s,background .2s}.math-level strong{font-size:18px}.math-level small{color:#b9cfe4}.math-level:hover{transform:translateY(-3px);background:#254263}.math-level.selected{outline:2px solid #70dcff;background:#1d3c5d}.math-workspace{scroll-margin-top:100px}.math-tabs{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:16px}.math-tabs button,.math-options button,.math-retry,.math-next-btn{font:inherit;border-radius:12px;padding:12px 16px;cursor:pointer;font-weight:650}.math-tabs button{background:#213650;border:1px solid #3a5977;color:#d9ecff}.math-tabs button.active{background:#76dcff;color:#081a30}.math-lesson-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}.math-panel{background:#172942;border:1px solid #39536f;border-radius:20px;padding:26px;min-width:0}.math-panel h3{font-size:23px;line-height:1.3;margin:12px 0}.math-panel p{color:#c6d7e8}.math-example{margin-top:24px;background:#0d2036;border-left:4px solid #6cddff;border-radius:10px;padding:17px}.math-example p{color:#f2f8ff;font-size:18px}.math-options{display:grid;gap:10px}.math-options button{background:#243c59;border:1px solid #486887;color:white;text-align:left}.math-options button:hover:not(:disabled){background:#325778}.math-options button.correct{background:#1a5b4b;border-color:#74efb5}.math-options button.incorrect{background:#6a2f42;border-color:#ff9eac}.math-feedback{margin-top:15px;color:#e7f5ff;font-weight:650}.math-retry,.math-next-btn{margin:8px 8px 0 0;background:#78ddff;color:#0a1b2d;border:0}.math-next-btn{background:#b1eac9}.math-next{margin-top:50px}.math-tips{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.math-tips article{background:#172942;border:1px solid #39536f;border-radius:15px;padding:18px}.math-tips p{color:#b9cfe4}.math-link{display:inline-block;color:#7cddff;margin-top:20px;font-weight:700}.maths-page footer{text-align:center;color:#afc3d9;padding:30px;border-top:1px solid #344d69}.maths-page footer a{color:#8ce0ff}.maths-page button:focus-visible,.maths-page a:focus-visible{outline:3px solid #f5d96a;outline-offset:3px}@media(max-width:690px){.math-nav{align-items:flex-start}.math-nav nav{justify-content:flex-end;gap:8px}.math-nav a{font-size:13px}.math-hero{padding:28px 20px}.math-lesson-grid,.math-tips{grid-template-columns:1fr}.math-panel{padding:20px}.math-levels{grid-template-columns:repeat(2,minmax(0,1fr))}}
*{box-sizing:border-box}html{scroll-behavior:smooth}.lesson-page main{max-width:1120px;margin:auto;padding:24px 18px 70px}.crumb{display:inline-block;color:#91e5ff;margin:8px 0 22px;font-weight:700}.study-hero{padding:clamp(24px,5vw,52px);border:1px solid #42617e;border-radius:22px;background:linear-gradient(135deg,#193955,#101d35);margin-bottom:22px}.study-hero h1{font-size:clamp(28px,5vw,48px);line-height:1.15;margin:12px 0}.study-hero p{color:#d0dfef;max-width:700px;font-size:17px}.study-layout{display:grid;grid-template-columns:minmax(0,1.4fr) minmax(280px,1fr);gap:18px;align-items:start}.study-card{min-width:0;background:#182a42;border:1px solid #3a5573;border-radius:20px;padding:clamp(20px,3vw,32px)}.study-card h2{font-size:clamp(20px,3vw,26px);margin:18px 0 12px}.study-card p,.study-card li{color:#d0e0f0;line-height:1.85;overflow-wrap:anywhere}.study-card ol{padding-left:22px}.study-card li{margin:12px 0}.study-example{background:#0d2239;border-left:4px solid #77ddff;border-radius:12px;padding:18px;margin:24px 0}.study-example strong{color:#91eaff}.answer-stack{display:grid;gap:10px}.answer-stack button{width:100%;text-align:left;padding:15px 18px;border-radius:12px;border:1px solid #537391;background:#25415e;color:white;font:inherit;cursor:pointer;min-height:48px}.answer-stack button.correct{background:#185946;border-color:#7ce5b3}.answer-stack button.incorrect{background:#683447;border-color:#ffb1c2}.study-action{display:inline-block;margin:14px 8px 0 0;padding:13px 17px;border:0;border-radius:12px;background:#7cdeff;color:#0b2032!important;font-weight:800;text-decoration:none;cursor:pointer;min-height:46px}.done-check{display:flex;align-items:center;gap:10px;padding:15px 0}.done-check input{width:22px;height:22px}.lesson-page :focus-visible{outline:3px solid #ffdd78;outline-offset:3px}@media(max-width:760px){.study-layout{grid-template-columns:1fr}.math-nav{padding:12px 14px;flex-wrap:wrap}.math-nav nav{gap:8px}.math-nav nav a{font-size:12px}.lesson-page main{padding:16px 12px 48px}.study-card{padding:20px}.study-hero{border-radius:16px}.study-action{width:100%;text-align:center;margin-right:0}}@media(max-width:650px){.cn-course-header{padding:12px!important;gap:9px!important;align-items:center}.cn-course-title{width:100%;order:3;font-size:13px}.cn-course-header a{font-size:13px!important}.learning-page main{padding:18px 12px!important}.learning-page .card{padding:16px!important}.learning-page .grid{grid-template-columns:1fr!important}.learning-page h1{font-size:clamp(28px,8vw,40px)}.learning-page button{min-height:46px}.math-levels{grid-template-columns:repeat(2,minmax(0,1fr))}.math-nav{flex-wrap:wrap}.math-nav nav{width:100%;justify-content:space-between}.math-hero{padding:24px 18px}.maths-page main{padding:16px 12px 50px}.math-panel{padding:18px}.math-tabs{flex-wrap:nowrap;overflow-x:auto;padding-bottom:8px}.math-tabs button{flex:0 0 auto}}
/* Améliorations pour téléphones */
html{scroll-padding-top:85px}body{overflow-x:hidden}button,a{touch-action:manipulation}button:focus-visible,a:focus-visible{outline:3px solid #77ddff;outline-offset:3px}@media(max-width:700px){.math-nav,.cn-course-header{padding:12px 14px!important;gap:10px!important}.math-nav nav,.cn-course-header nav{display:flex;flex-wrap:wrap;gap:8px}.study-layout,.math-lesson-grid{display:grid;grid-template-columns:minmax(0,1fr)!important}.study-card,.study-hero,.math-panel{min-width:0;overflow-wrap:anywhere}.study-card{padding:18px!important}main{max-width:100%;padding-left:14px!important;padding-right:14px!important}h1{font-size:clamp(1.7rem,7vw,2.4rem)!important}button,.study-action,.math-premium{min-height:44px}.answer-stack button{width:100%;text-align:left}}
/* CodeNova — lecture confortable et entraînement */
@import url('https://fonts.googleapis.com/css2?family=Nunito+Sans:wght@400;500;600;700;800;900&display=swap');
.lesson-page{font-family:'Nunito Sans',system-ui,-apple-system,sans-serif;line-height:1.75;letter-spacing:.005em;background:linear-gradient(150deg,#071225,#0b1930 60%,#09172b);color:#edf5ff}
.lesson-page #lesson-main{max-width:1160px;margin:0 auto;padding:clamp(16px,3vw,36px)}
.lesson-page .study-hero{padding:clamp(24px,4vw,52px);border-radius:24px;background:linear-gradient(125deg,#173858,#13243e);border:1px solid #3e6687;margin:18px 0 26px}
.lesson-page .study-hero h1{font-size:clamp(2rem,4.5vw,3.4rem);line-height:1.17;letter-spacing:-.035em;margin:12px 0 18px;font-weight:900}
.lesson-page .study-hero p{font-size:clamp(1rem,1.5vw,1.17rem);line-height:1.8;max-width:68ch;color:#d2e3f2}
.lesson-page .study-card{background:#14243b;border:1px solid #355472;border-radius:22px;padding:clamp(20px,3vw,38px);box-shadow:0 14px 35px #0002;min-width:0}
.lesson-page .study-card h2{font-size:clamp(1.3rem,2.2vw,1.7rem);line-height:1.3;letter-spacing:-.02em;margin-top:25px}
.lesson-page .study-card p,.lesson-page .study-card li{font-size:1.06rem;line-height:1.85;color:#e0eaf5}
.lesson-page .study-card li{padding:4px 0}.lesson-page .study-example{background:#203d50;border-left:4px solid #79dfff;padding:22px;border-radius:14px;margin:25px 0}
.lesson-page .answer-stack button{font:700 1rem 'Nunito Sans',system-ui,sans-serif;line-height:1.5;min-height:52px;text-align:left;padding:13px 18px;border-radius:13px;cursor:pointer;transition:transform .15s,border-color .15s}
.lesson-page .answer-stack button:not(:disabled):hover{transform:translateY(-2px);border-color:#80dfff}
.lesson-page button:focus-visible,.lesson-page a:focus-visible{outline:3px solid #83dfff;outline-offset:4px}
.lesson-page .study-action{min-height:48px;display:inline-flex;align-items:center;justify-content:center;text-align:center;padding:12px 18px;border-radius:12px;font-weight:800}
.lesson-page .extra-quiz{border-top:1px solid #49617b;margin-top:24px;padding-top:22px}.lesson-page .quiz-step{color:#8ee3ff;font-weight:900;font-size:.87rem;letter-spacing:.04em}.lesson-page .extra-quiz h3{font-size:1.15rem;line-height:1.5}.lesson-page .extra-feedback{font-weight:700}.lesson-page .quiz-complete{padding:18px;background:#164537;border-radius:12px;font-weight:800}
@media(max-width:760px){.lesson-page .study-layout{display:grid;grid-template-columns:minmax(0,1fr);gap:18px}.lesson-page .study-hero{border-radius:18px}.lesson-page .study-card{border-radius:18px}.lesson-page .math-nav{padding:10px 15px;gap:8px;flex-wrap:wrap}.lesson-page .math-nav a{min-height:44px;display:inline-flex;align-items:center}.lesson-page .study-action{width:100%;box-sizing:border-box}.lesson-page .study-card p,.lesson-page .study-card li{font-size:1rem}}

/* Lisibilité renforcée des explications mathématiques */
.study-card p,.math-panel p{line-height:1.85;letter-spacing:.005em;font-size:1.04rem}
.clear-steps{padding-left:1.65rem;display:grid;gap:1.05rem;line-height:1.8;margin:1rem 0 1.6rem}
.clear-steps li{padding-left:.35rem}
.study-card h2{margin-top:1.8rem;margin-bottom:.65rem;line-height:1.35}
.study-example{line-height:1.8}
.source-link{font-weight:750;text-decoration:underline;text-underline-offset:4px;overflow-wrap:anywhere}
.source-link:focus-visible{outline:3px solid #f5bd52;outline-offset:3px}
@media(max-width:600px){.study-card p,.math-panel p{font-size:1rem}.clear-steps{padding-left:1.35rem}}