:root{--nav-height:44px;--footer-height:46px;--largeur-feuille:1000px;--couleur-fond:#120B08;--couleur-fond-clair:#1e1510;--couleur-craie:#e8e0d0;--couleur-craie-vive:#f5f0e6;--couleur-carreaux-fond:#f0f4f8;--couleur-carreaux-ligne:#b8cce0;--couleur-accent:#2563eb;--couleur-accent-hover:#1d4ed8;--couleur-texte:#1e293b;--couleur-texte-secondaire:#64748b;--couleur-surface:#ffffff;--couleur-bordure:#e2e8f0;--couleur-bordure-legere:#f1f5f9;--couleur-primaire:#1a365d;--couleur-primaire-clair:#2b4c7e;--rayon:8px;--ombre:0 1px 3px rgba(0,0,0,0.08);--ombre-hover:0 4px 12px rgba(0,0,0,0.12);--espacement:1.5rem}*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}html{font-size:16px}body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;color:var(--couleur-texte);line-height:1.6;min-height:100vh;display:flex;flex-direction:column;background:var(--couleur-fond) url("/static/zmaths/images/fond-perdu.png") no-repeat center center;background-size:cover;background-attachment:fixed;overflow:hidden}a{color:var(--couleur-accent);text-decoration:none}a:hover{text-decoration:underline}img{max-width:100%;height:auto}.splash{min-height:100%;display:flex;flex-direction:column;align-items:center;justify-content:flex-start;background:var(--couleur-fond) url("/static/zmaths/images/fond-perdu.png") no-repeat center center;background-size:cover;position:relative;z-index:2}.splash-header{width:100%;display:block}.splash-logo{width:50px;height:50px;object-fit:contain;margin:1rem 0}.splash-titre{font-family:"Segoe Print","Comic Sans MS","Bradley Hand",cursive;font-size:3rem;font-weight:700;color:var(--couleur-craie-vive);text-shadow:0 0 8px rgba(255,255,255,0.2);text-align:center;letter-spacing:0.02em;margin-top:1.5rem;margin-bottom:0;line-height:1.1}.splash-sous-titre{font-family:"Segoe Print","Comic Sans MS","Bradley Hand",cursive;font-size:2.2rem;color:var(--couleur-craie);text-shadow:0 0 6px rgba(255,255,255,0.15);text-align:center;opacity:0.8}body.has-splash .site-footer{opacity:0;pointer-events:none}.splash .scroll-hint{margin-top:auto;margin-bottom:2rem;border-color:var(--couleur-craie);color:var(--couleur-craie);opacity:0.5}.site-nav{position:sticky;top:0;z-index:100;background:var(--couleur-fond-clair);border-bottom:1px solid rgba(255,255,255,0.1);transition:background 0.3s ease}.nav-inner{display:flex;align-items:center;justify-content:center;height:var(--nav-height);padding:0 1.25rem;gap:1rem;transition:justify-content 0.3s ease}.nav-brand{display:none;align-items:center;text-decoration:none;flex-shrink:0}.nav-brand:hover{text-decoration:none;opacity:0.9}.nav-logo{height:44px;width:auto}.nav-links{display:flex;align-items:center;width:100%;max-width:var(--largeur-feuille);margin:0 auto;gap:1rem}.nav-right{margin-left:auto;display:flex;align-items:center;gap:1rem}.nav-right a{color:var(--couleur-craie);text-decoration:none;font-size:0.9rem;transition:color 0.15s;display:flex;align-items:center;gap:0.35rem}.nav-right a:hover{color:var(--couleur-craie-vive);text-decoration:none}.nav-sep{color:var(--couleur-craie);opacity:0.3;font-size:0.85rem;user-select:none}.nav-links>a{color:var(--couleur-craie);text-decoration:none;font-size:0.9rem;padding:0.4rem 0;transition:color 0.15s}.nav-links>a:hover{color:var(--couleur-craie-vive);text-decoration:none}.nav-dropdown{position:relative}.nav-dropdown-toggle{color:var(--couleur-craie);text-decoration:none;font-size:0.9rem;cursor:pointer;padding:0.4rem 0;display:inline-block;transition:color 0.15s}.nav-dropdown-toggle:hover{color:var(--couleur-craie-vive);text-decoration:none}.nav-dropdown-menu{display:none;position:absolute;top:100%;left:50%;transform:translateX(-50%);padding-top:0.4rem;z-index:100}.nav-dropdown-menu-inner{background:var(--couleur-surface);border:1px solid var(--couleur-bordure);border-radius:var(--rayon);box-shadow:var(--ombre-hover);min-width:180px;padding:0.4rem 0}.nav-dropdown-menu-inner a{display:block;padding:0.5rem 1rem;font-size:0.86rem;color:var(--couleur-texte);text-decoration:none;white-space:nowrap}.nav-dropdown-menu-inner a:hover{background:var(--couleur-bordure-legere);color:var(--couleur-accent);text-decoration:none}.nav-dropdown:hover .nav-dropdown-menu,.nav-dropdown:focus-within .nav-dropdown-menu{display:block}.nav-sites{display:none;align-items:center;gap:0.75rem;flex-shrink:0}.nav-site-link{display:flex;align-items:center;gap:0.3rem;color:var(--couleur-craie);text-decoration:none;font-size:0.72rem;opacity:0.7;transition:opacity 0.2s}.nav-site-link:hover{opacity:1;text-decoration:none;color:var(--couleur-craie-vive)}.nav-site-link img{width:18px;height:18px;border-radius:3px;object-fit:contain}.site-nav.compact{background:var(--couleur-fond);border-bottom:1px solid rgba(255,255,255,0.15)}.site-nav.compact .nav-inner{justify-content:space-between;height:auto;min-height:60px;padding:0.5rem 0}.site-nav.compact .nav-brand{display:flex;min-width:120px;flex-shrink:0;justify-content:center}.site-nav.compact .nav-links{flex:1;width:auto;min-width:0;justify-content:center;gap:1rem}.site-nav.compact .nav-sites{display:flex;flex-direction:column;min-width:120px;flex-shrink:0;align-items:center;gap:0.1rem}.site-nav.compact .nav-links>a,.site-nav.compact .nav-dropdown-toggle,.site-nav.compact .nav-sep,.site-nav.compact .nav-right a{font-size:0.78rem;line-height:1.15;text-align:center}.site-nav.compact .nav-dropdown,.site-nav.compact .nav-right{text-align:center}.hamburger{display:none;background:none;border:none;cursor:pointer;padding:0.5rem;color:var(--couleur-craie-vive)}.hamburger svg{width:24px;height:24px}.mobile-nav{display:none}.site-body{position:fixed;top:0;bottom:var(--footer-height);left:0;right:0;z-index:1;overflow-y:auto;overflow-x:hidden;scrollbar-width:thin;scrollbar-color:#666 #1a1a1a}.site-body::-webkit-scrollbar{width:10px}.site-body::-webkit-scrollbar-track{background:#1a1a1a}.site-body::-webkit-scrollbar-thumb{background:#555;border-radius:5px}.site-body::-webkit-scrollbar-thumb:hover{background:#777}.site-body::before{content:"";position:fixed;top:0;bottom:var(--footer-height);left:50%;transform:translateX(-50%);width:min(var(--largeur-feuille),calc(100vw - 240px));background-color:var(--couleur-carreaux-fond);background-image:repeating-linear-gradient(0deg,transparent,transparent 19px,var(--couleur-carreaux-ligne) 19px,var(--couleur-carreaux-ligne) 20px),repeating-linear-gradient(90deg,transparent,transparent 19px,var(--couleur-carreaux-ligne) 19px,var(--couleur-carreaux-ligne) 20px);background-size:20px 20px;z-index:0;pointer-events:none;box-shadow:0 0 30px rgba(0,0,0,0.3)}.parchment{position:relative;z-index:1;box-sizing:border-box;width:100%;max-width:min(var(--largeur-feuille),calc(100vw - 240px));margin:0 auto;padding:0.5rem clamp(1.5rem,4vw,3rem) 4rem}.site-footer{position:fixed;bottom:0;left:0;right:0;z-index:100;height:var(--footer-height);background:var(--couleur-fond);border-top:1px solid rgba(255,255,255,0.1);padding:0 1rem;display:flex;align-items:center;transition:opacity 0.3s ease}.footer-inner{width:100%;display:flex;justify-content:space-between;align-items:center}.footer-left{font-size:0.78rem;color:var(--couleur-craie);opacity:0.6}.footer-right{display:flex;gap:1.25rem}.footer-right a{color:var(--couleur-craie);text-decoration:none;font-size:0.78rem;opacity:0.5}.footer-right a:hover{opacity:1;color:var(--couleur-craie-vive)}.scroll-hint{margin-top:1.5rem;display:inline-flex;align-items:center;justify-content:center;width:44px;height:44px;border:2px solid var(--couleur-texte-secondaire);border-radius:50%;color:var(--couleur-texte-secondaire);opacity:0.4;animation:rebond 2s ease-in-out infinite;cursor:pointer}@keyframes rebond{0%,100%{transform:translateY(0)}50%{transform:translateY(8px)}}.page-header{padding:1.5rem 0}.page-header h1{font-size:2rem;font-weight:700;color:var(--couleur-primaire);margin-bottom:0.5rem}.page-header p{color:var(--couleur-texte-secondaire)}.breadcrumb{font-size:0.85rem;color:var(--couleur-texte-secondaire);margin-bottom:1rem}.breadcrumb a{color:var(--couleur-texte-secondaire)}.breadcrumb a:hover{color:var(--couleur-accent)}.niveaux-grid{padding:2rem 0}.niveaux-grid>p{margin-bottom:1rem}.niveaux-grid h2,.chapitres-section h2,.pdfs-section h2,.catalogue-section h2{font-size:1.35rem;font-weight:700;color:var(--couleur-primaire);margin-top:2rem;margin-bottom:1rem}.chapitres-section h2:first-child{margin-top:0}.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:1rem}.cards.cards-4{grid-template-columns:repeat(4,1fr)}.card{display:block;background:var(--couleur-surface);border:1px solid var(--couleur-bordure);border-radius:var(--rayon);padding:1.5rem;text-decoration:none;color:inherit;transition:box-shadow 0.2s,border-color 0.2s}.card:hover{text-decoration:none;box-shadow:var(--ombre-hover);border-color:var(--couleur-accent)}.card h3{font-size:1.1rem;font-weight:600;color:var(--couleur-primaire);margin-bottom:0.5rem}.card p{font-size:0.9rem;color:var(--couleur-texte-secondaire);margin-bottom:0.75rem}.badge{display:inline-block;font-size:0.8rem;background:var(--couleur-bordure-legere);color:var(--couleur-texte-secondaire);padding:0.2rem 0.6rem;border-radius:100px}.stats-section{padding:2rem 0}.stats-bar{display:flex;justify-content:center;gap:3rem;padding:2rem;background:var(--couleur-surface);border:1px solid var(--couleur-bordure);border-radius:var(--rayon)}.stat{text-align:center}.stat-number{display:block;font-size:2rem;font-weight:800;color:var(--couleur-primaire)}.stat-label{font-size:0.85rem;color:var(--couleur-texte-secondaire)}.catalogue-section{padding:2rem 0}.filter-bar{display:flex;gap:0.75rem;margin-bottom:1.5rem;flex-wrap:wrap}.filter-bar select{padding:0.5rem 0.75rem;border:1px solid var(--couleur-bordure);border-radius:var(--rayon);background:var(--couleur-surface);font-size:0.9rem;color:var(--couleur-texte);cursor:pointer}.catalogue-list{display:flex;flex-direction:column;gap:0.5rem}.pdf-item{display:flex;align-items:center;justify-content:space-between;gap:1rem;padding:0.75rem 1rem;background:var(--couleur-surface);border:1px solid var(--couleur-bordure);border-radius:var(--rayon)}.pdf-info{flex:1;min-width:0}.pdf-titre{display:block;font-size:0.95rem;font-weight:500;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.pdf-meta{display:flex;gap:0.4rem;margin-top:0.25rem}.tag{display:inline-block;font-size:0.7rem;padding:0.1rem 0.5rem;border-radius:100px;text-transform:uppercase;letter-spacing:0.03em;font-weight:600}.tag-niveau{background:#dbeafe;color:#1e40af}.tag-type{background:#f0fdf4;color:#166534}.tag-version{background:#fef3c7;color:#92400e}.btn-download{flex-shrink:0;display:inline-flex;align-items:center;padding:0.4rem 0.9rem;font-size:0.85rem;font-weight:600;color:var(--couleur-accent);border:1px solid var(--couleur-accent);border-radius:var(--rayon);text-decoration:none;transition:background 0.15s,color 0.15s}.btn-download:hover{background:var(--couleur-accent);color:white;text-decoration:none}.no-results{text-align:center;padding:2rem;color:var(--couleur-texte-secondaire)}.article-content{padding:0 0 3rem;line-height:1.75}.article-content h2{font-size:1.4rem;font-weight:700;color:var(--couleur-primaire);margin:2rem 0 0.75rem}.article-content h3{font-size:1.15rem;font-weight:600;margin:1.5rem 0 0.5rem}.article-content h3 a{color:inherit}.article-content h3:has(a[href*="cours-"]){border-left:4px solid #dc2626;padding-left:0.75rem}.article-content h3:has(a[href*="exercices-"]),.article-content h3:has(a[href*="questions-flash"]){border-left:4px solid #2563eb;padding-left:0.75rem}.article-content h3:has(a[href*="activite-"]),.article-content h3:has(a[href*="correction-"]){border-left:4px solid #16a34a;padding-left:0.75rem}.article-content p{margin-bottom:1rem}.article-content ul,.article-content ol{margin:0.5rem 0 1rem 1.5rem}.article-content li{margin-bottom:0.25rem}.article-content blockquote{border-left:3px solid var(--couleur-accent);padding:0.75rem 1rem;margin:1rem 0;color:var(--couleur-texte-secondaire);background:var(--couleur-bordure-legere);border-radius:0 var(--rayon) var(--rayon) 0}.article-content .fiche{border:1px solid var(--couleur-bordure);border-radius:var(--rayon);padding:1rem 1.25rem;margin-bottom:1rem;background:var(--couleur-surface)}.article-content .fiche h3{margin-top:0;margin-bottom:0.5rem}.article-content .fiche p:last-child{margin-bottom:0}.article-content a[href$=".pdf"]{display:inline-block;padding:0.35rem 0.85rem;margin:0.15rem 0.25rem 0.15rem 0;font-size:0.85rem;font-weight:600;color:var(--couleur-accent);border:1px solid var(--couleur-accent);border-radius:var(--rayon);transition:background 0.15s,color 0.15s}.article-content a[href$=".pdf"]:hover{background:var(--couleur-accent);color:white;text-decoration:none}.article-content a[href$=".pdf"]::before{content:"";display:inline-block;width:14px;height:14px;margin-right:4px;background:currentColor;-webkit-mask:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath d='M4 0a2 2 0 0 0-2 2v12a2 2 0 0 0 2 2h8a2 2 0 0 0 2-2V5l-4-5H4zm5 0v4h4L9 0zM5 9h6v1H5V9zm0 2h6v1H5v-1zm0 2h4v1H5v-1z'/%3E%3C/svg%3E") no-repeat center;mask:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath d='M4 0a2 2 0 0 0-2 2v12a2 2 0 0 0 2 2h8a2 2 0 0 0 2-2V5l-4-5H4zm5 0v4h4L9 0zM5 9h6v1H5V9zm0 2h6v1H5v-1zm0 2h4v1H5v-1z'/%3E%3C/svg%3E") no-repeat center;-webkit-mask-size:contain;mask-size:contain;vertical-align:-2px}.article-content>p:last-child:has(a[href^="/ressources/"]){text-align:center;margin-top:2rem}.article-date{font-size:0.85rem;color:var(--couleur-texte-secondaire)}.btn{display:inline-block;padding:0.6rem 1.2rem;font-size:0.95rem;font-weight:600;border-radius:var(--rayon);text-decoration:none;transition:background 0.15s;background:var(--couleur-accent);color:white}.btn:hover{background:var(--couleur-accent-hover);text-decoration:none}.btn-secondary{background:transparent;color:var(--couleur-accent);border:1px solid var(--couleur-accent)}.btn-secondary:hover{background:var(--couleur-accent);color:white}.error-page{text-align:center;padding:4rem 0}.error-links{display:flex;gap:1rem;justify-content:center;margin-top:2rem}.section-bienvenue{padding:2rem 0}.section-bienvenue h2{font-size:1.35rem;font-weight:700;color:var(--couleur-primaire);margin-bottom:0.5rem}.bienvenue-grid{display:flex;align-items:flex-start;gap:1.5rem}.bienvenue-logo{width:90px;height:auto;flex-shrink:0}.bienvenue-texte{flex:1}.section-services{padding:2rem 0}.section-services h2{font-size:1.35rem;font-weight:700;color:var(--couleur-primaire);margin-bottom:1rem}.services-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:1rem}a.service-card,a.service-card:hover{display:block;text-decoration:none;color:inherit}.service-card{background:var(--couleur-surface);border:1px solid var(--couleur-bordure);border-radius:var(--rayon);padding:1.5rem;transition:box-shadow 0.2s,border-color 0.2s}.service-card:hover{box-shadow:var(--ombre-hover);border-color:#666}.service-icon{font-size:1.2rem}.service-card h3{font-size:1.05rem;font-weight:600;color:var(--couleur-primaire);margin-bottom:0.4rem}.service-card p{font-size:0.9rem;color:var(--couleur-texte-secondaire);line-height:1.5}.prof-card{display:flex;align-items:flex-start;gap:1.5rem}.prof-photo{width:120px;height:auto;border-radius:var(--rayon);flex-shrink:0}.section-equipe{padding:2.5rem 2rem;margin:2rem 0;background:var(--couleur-bordure-legere);border-radius:var(--rayon);text-align:center}.section-equipe h2{font-size:1.35rem;font-weight:700;color:var(--couleur-primaire);margin-bottom:0.75rem}.section-equipe p{font-size:1rem;color:var(--couleur-texte-secondaire);max-width:600px;margin:0 auto 1.5rem}.cta-link{text-align:center;margin-top:1.5rem}.cta-arrow{color:var(--couleur-primaire);font-weight:500;text-decoration:none;font-size:0.95rem}.cta-arrow:hover{text-decoration:underline}.cta-arrow-center{text-align:center;margin:1rem 0}.tarif-center{text-align:center}.carte-zone{margin:1rem 0}.article-content>.service-card{margin-bottom:1rem}.article-content>.services-grid{margin-bottom:1rem}.section-news{padding:2rem 0}.section-news h2{font-size:1.35rem;font-weight:700;color:var(--couleur-primaire);margin-bottom:1rem}.news-list{list-style:none;padding:0;margin:0}.news-list li{padding:0.5rem 0;border-bottom:1px solid var(--couleur-bordure-legere);font-size:0.95rem}.news-list li:last-child{border-bottom:none}.news-date{display:inline-block;font-weight:600;color:var(--couleur-primaire);min-width:90px;margin-right:0.5rem}.section-livre-dor{padding:2rem 0}.section-livre-dor h2{font-size:1.35rem;font-weight:700;color:var(--couleur-primaire);margin-bottom:1rem}.temoignages{display:flex;flex-direction:column;gap:1rem;margin-bottom:2rem}.temoignage{background:var(--couleur-surface);border:1px solid var(--couleur-bordure);border-radius:var(--rayon);padding:1.25rem}.temoignage-message{font-size:0.95rem;font-style:italic;line-height:1.6;margin-bottom:0.5rem}.temoignage-auteur{font-size:0.85rem;color:var(--couleur-texte-secondaire);text-align:right}.livre-dor-form h3{font-size:1.1rem;font-weight:600;color:var(--couleur-primaire);margin-bottom:0.75rem}.tarif-cards{display:flex;gap:1rem;flex-wrap:wrap;margin:1rem 0 1.5rem}.tarif-card{flex:1;min-width:160px;background:var(--couleur-surface);border:2px solid var(--couleur-accent);border-radius:var(--rayon);padding:1.25rem 1rem;text-align:center;font-size:0.95rem;line-height:1.5}.tarif-card strong{font-size:1.25rem;color:var(--couleur-primaire)}.service-features{margin:1rem 0}.service-features ul{list-style:none;padding:0;margin:0}.service-features li{padding:0.5rem 0;border-bottom:1px solid var(--couleur-bordure-legere)}.service-features li:last-child{border-bottom:none}.service-form{max-width:520px;margin:1.5rem auto 2rem}.service-form .form-group{margin-bottom:1rem}.service-form label{display:block;font-size:0.9rem;font-weight:600;color:var(--couleur-texte);margin-bottom:0.3rem}.service-form input,.service-form select,.service-form textarea{width:100%;padding:0.6rem 0.75rem;font-size:0.9rem;border:1px solid var(--couleur-bordure);border-radius:var(--rayon);background:var(--couleur-surface);color:var(--couleur-texte);font-family:inherit}.service-form input:focus,.service-form select:focus,.service-form textarea:focus{outline:none;border-color:var(--couleur-accent);box-shadow:0 0 0 3px rgba(37,99,235,0.15)}.service-form textarea{resize:vertical}.service-form .btn{margin-top:0.5rem;display:block;width:100%;text-align:center}.tarifs-grid table{width:100%;border-collapse:collapse;margin:1rem 0 1.5rem;background:var(--couleur-surface);border-radius:var(--rayon);overflow:hidden;border:1px solid var(--couleur-bordure)}.tarifs-grid th,.tarifs-grid td{padding:0.6rem 1rem;text-align:left;border-bottom:1px solid var(--couleur-bordure);font-size:0.9rem}.tarifs-grid th{background:var(--couleur-primaire);color:white;font-weight:600;font-size:0.85rem}.tarifs-grid th:not(:first-child){text-align:center}.tarifs-grid td:first-child{font-weight:500}.tarifs-grid td:not(:first-child){text-align:center;white-space:nowrap}.tarifs-grid tr.tarifs-section td{background:var(--couleur-bordure-legere);font-weight:700;font-size:0.85rem;color:var(--couleur-primaire);padding:0.4rem 1rem;border-bottom:1px solid var(--couleur-bordure)}.tarifs-grid tr:not(.tarifs-section) td:first-child{padding-left:2rem}.tarifs-grid tr:last-child td{border-bottom:none}.tarifs-grid tr:hover:not(.tarifs-section) td{background:var(--couleur-bordure-legere)}.tarif-avant,.tarifs-grid s,.tarif-center s{color:var(--couleur-texte-secondaire,#888);font-size:0.85em;margin-right:0.3em}.form-confirmation{background:#f0fdf4;border:1px solid #86efac;border-radius:var(--rayon);padding:1rem 1.25rem;margin-bottom:1.5rem;color:#166534;font-weight:500}.math-cours{margin:1.5rem 0;counter-reset:figure}.math-cours h4{font-size:1.15rem;font-weight:700;color:var(--couleur-primaire);margin:1.5rem 0 0.75rem;padding-bottom:0.25rem;border-bottom:2px solid var(--couleur-accent)}.math-definition{background:var(--couleur-surface);border:1px solid var(--couleur-bordure);border-left:4px solid #2563eb;border-radius:var(--rayon);padding:0.75rem 1rem;margin:0.75rem 0;line-height:1.7}.math-propriete{background:var(--couleur-surface);border:1px solid var(--couleur-bordure);border-left:4px solid #dc2626;border-radius:var(--rayon);padding:0.75rem 1rem;margin:0.75rem 0;line-height:1.7}.math-definition strong,.math-propriete strong{color:var(--couleur-primaire)}.math-exemple{background:var(--couleur-bordure-legere);border-radius:var(--rayon);margin:0.75rem 0;padding:0.75rem 1rem;border-left:4px solid #16a34a;line-height:1.8}.math-exemple-titre{font-weight:600;color:var(--couleur-texte);margin-bottom:0.25rem}.math-exemple ol>li::marker{font-weight:bold}.type-enonce .math-exemple{border-left-color:#2563eb}.type-correction .math-exemple{border-left-color:#16a34a}details.math-demonstration,details.math-correction{border-radius:var(--rayon);padding:0.75rem 1rem;margin:0.75rem 0;font-size:0.92rem;line-height:1.8}details.math-demonstration{background:var(--couleur-bordure-legere);border-left:4px solid #9ca3af}details.math-correction{background:#f0fdf4;border-left:4px solid #16a34a}details.math-demonstration>summary,details.math-correction>summary{cursor:pointer;font-weight:600;list-style:none;display:flex;align-items:center;gap:0.4rem}details.math-demonstration>summary::-webkit-details-marker,details.math-correction>summary::-webkit-details-marker{display:none}details.math-demonstration>summary::marker,details.math-correction>summary::marker{content:""}details.math-demonstration>summary::before,details.math-correction>summary::before{content:"▶";font-size:0.7em;transition:transform 0.2s ease;display:inline-block;flex-shrink:0}details[open].math-demonstration>summary::before,details[open].math-correction>summary::before{transform:rotate(90deg)}.math-demonstration-titre{font-style:italic}.math-correction-titre{color:#166534}.math-remarque{background:var(--couleur-bordure-legere);border-radius:var(--rayon);font-size:0.9rem;color:var(--couleur-texte-secondaire);margin:0.75rem 0;padding:0.75rem 1rem;border-left:4px solid #374151;line-height:1.6}.math-pdf-lien{display:inline-flex;align-items:center;gap:0.35rem;margin-top:0.5rem;font-size:0.85rem;color:var(--couleur-accent);text-decoration:none}.math-pdf-lien:hover{text-decoration:underline}.math-texte{background:var(--couleur-bordure-legere);border-radius:var(--rayon);margin:0.75rem 0;padding:0.75rem 1rem;line-height:1.7}.math-figure{text-align:center;margin:1rem 0}.math-figure img{max-width:100%;height:auto;mix-blend-mode:multiply}.math-figure img[alt^="Tableau de variation"],.math-figure img[alt^="Tableau de signe"]{max-width:min(100%,500px)}.math-figure em{counter-increment:figure}.math-figure em::before{content:"Figure " counter(figure) " — "}.math-figure:has(+ .math-figure),.math-figure + .math-figure{display:inline-block;vertical-align:middle;width:48%;margin:0.5rem 0}.math-figure-row{display:flex;justify-content:center;gap:1.5rem;margin:1rem 0;flex-wrap:wrap}.math-figure-row .math-figure{display:block;margin:0;flex:1 1 150px;width:auto}.math-grid .math-figure:has(+ .math-figure),.math-grid .math-figure + .math-figure,.math-figure-row .math-figure:has(+ .math-figure),.math-figure-row .math-figure + .math-figure{display:block;width:100%;margin:0}.math-row{display:flex;gap:1rem;align-items:flex-start;margin:0.5rem 0}.math-row>div{flex:1 1 0;min-width:0}.math-row .math-figure{margin:0.5rem 0}.math-row .math-figure img{max-width:100%;height:auto}.math-row .math-figure:has(+ .math-figure),.math-row .math-figure + .math-figure{display:block;width:100%}.math-grid{display:grid;grid-template-columns:1fr 1fr;gap:1rem;margin:0.5rem 0}.math-row-center{display:flex;gap:1rem;margin:0.5rem 0}.math-row-center>div{flex:1 1 0;min-width:0;text-align:center}.math-table{width:100%;border-collapse:collapse}.math-table>tbody>tr>td,.math-table>tr>td{vertical-align:top;padding:0.5rem;width:50%}.math-table .math-figure{margin:0.5rem 0}.math-table .math-figure img{max-width:100%;height:auto}.math-table .math-figure:has(+ .math-figure),.math-table .math-figure + .math-figure{display:block;width:100%}.math-table-center>tbody>tr>td,.math-table-center>tr>td{text-align:center}.math-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1rem;margin:1rem 0;text-align:center}.math-grid .math-figure{margin:0}.math-grid img{max-width:100%;height:auto}br.mobile-br{display:none}.math-cours table:not(.math-table):not(.math-table-center):not(.math-grid):not(.math-variation):not(.math-signe){border-collapse:collapse;margin:0.75rem auto;border:1px solid #94a3b8}.math-cours table:not(.math-table):not(.math-table-center):not(.math-grid):not(.math-variation):not(.math-signe) td,.math-cours table:not(.math-table):not(.math-table-center):not(.math-grid):not(.math-variation):not(.math-signe) th{border:1px solid #94a3b8;padding:0.35rem 0.75rem;text-align:center}.math-variation{border-collapse:collapse;margin:0.75rem auto;border:2px solid #334155}.math-variation td{padding:0.3rem 0.6rem;text-align:center;border:none}.math-variation tr:first-child td{border-bottom:2px solid #334155;border-right:1px solid #94a3b8}.math-variation tr:first-child td:last-child{border-right:none}.math-variation .math-var-label{font-weight:600;background:#f1f5f9;white-space:nowrap;border-right:2px solid #334155!important}.math-variation .math-var-row{height:4rem}.math-variation .math-var-row td:not(.math-var-label){border:none}.math-variation .math-var-haut{vertical-align:top;padding-top:0.3rem}.math-variation .math-var-bas{vertical-align:bottom;padding-bottom:0.3rem}.math-variation .math-var-arrow-up{padding:0;min-width:2.5rem;background:linear-gradient(to top right,transparent calc(50% - 1px),#334155 calc(50% - 1px),#334155 calc(50% + 1px),transparent calc(50% + 1px))}.math-variation .math-var-arrow-down{padding:0;min-width:2.5rem;background:linear-gradient(to bottom right,transparent calc(50% - 1px),#334155 calc(50% - 1px),#334155 calc(50% + 1px),transparent calc(50% + 1px))}.math-signe{border-collapse:collapse;margin:0.75rem auto;border:2px solid #64748b}.math-signe td{border:1px solid #94a3b8;padding:0.3rem 0.6rem;text-align:center;min-width:1.5rem}.math-signe .math-var-label{font-weight:600;background:#f1f5f9;white-space:nowrap;border:2px solid #64748b}.math-signe .math-signe-zero,.math-variation .math-signe-zero{font-weight:700;color:#1e293b}.math-signe .math-signe-plus,.math-variation .math-signe-plus{color:#dc2626;font-weight:600}.math-signe .math-signe-moins,.math-variation .math-signe-moins{color:#2563eb;font-weight:600}.math-variation .math-var-signe td{border-bottom:1px solid #94a3b8}.fiche-pdf-box{display:flex;align-items:center;gap:1.25rem;margin:1rem 0;padding:1.25rem 1.5rem;background:var(--couleur-bordure-legere);border:1px solid var(--couleur-bordure);border-radius:var(--rayon)}.retour-chapitre{text-align:center;margin:2rem 0}.retour-chapitre a{color:var(--couleur-accent);text-decoration:none;font-weight:600}.retour-chapitre a:hover{text-decoration:underline}.fiche-navigation{margin:2rem 0;font-size:0.9rem}.fiche-nav-retour{text-align:center;padding-bottom:0.75rem;margin-bottom:0.75rem;border-bottom:1px solid var(--couleur-bordure-legere)}.fiche-nav-retour a{color:var(--couleur-accent);font-weight:600;text-decoration:none}.fiche-nav-retour a:hover{text-decoration:underline}.fiche-nav-prevnext{display:flex;justify-content:space-between;gap:1rem;padding:0.5rem 0}.fiche-nav-prev,.fiche-nav-next{color:var(--couleur-accent);text-decoration:none;max-width:48%}.fiche-nav-prev:hover,.fiche-nav-next:hover{text-decoration:underline}.fiche-nav-next{text-align:right;margin-left:auto}.fiche-nav-voiraussi{padding-top:0.75rem;margin-top:0.75rem;border-top:1px solid var(--couleur-bordure-legere);color:var(--couleur-texte-secondaire)}.fiche-nav-voiraussi-label{font-weight:600;margin-right:0.35rem}.fiche-nav-voiraussi a{display:block;color:var(--couleur-accent);text-decoration:none;margin-top:0.25rem}.fiche-nav-voiraussi a:hover{text-decoration:underline}.cta-cours{display:flex;align-items:center;gap:1.25rem;margin:1rem 0;padding:1.25rem 1.5rem;background:var(--couleur-bordure-legere);border:1px solid var(--couleur-bordure);border-radius:var(--rayon)}.cta-cours-logo{width:52px;height:auto;flex-shrink:0}.cta-cours-contenu{flex:1}.cta-cours-titre{font-size:1.1rem;font-weight:700;color:var(--couleur-primaire);margin-bottom:0.15rem}.cta-cours-sous-titre{font-size:0.88rem;color:var(--couleur-texte-secondaire);margin-bottom:0.75rem}.cta-cours-boutons{display:flex;gap:0.6rem;flex-wrap:wrap}.cta-cours-boutons .btn{font-size:0.82rem;padding:0.45rem 0.9rem}@media (max-width:768px){.splash{display:none}.site-nav .nav-links{display:none}.site-nav .nav-sites{display:none!important}.site-nav .nav-brand{display:flex!important}.site-nav .nav-inner{justify-content:space-between}.hamburger{display:block;margin-left:auto}.mobile-nav{display:none;flex-direction:column;position:absolute;top:100%;left:0;right:0;background:var(--couleur-fond);border-bottom:1px solid rgba(255,255,255,0.15);padding:0.5rem 0;z-index:200;max-height:70vh;overflow-y:auto}.mobile-nav.actif{display:flex}.mobile-nav>a{display:block;padding:0.6rem 1.25rem;color:var(--couleur-craie);text-decoration:none;font-size:0.9rem}.mobile-nav>a:hover{color:var(--couleur-craie-vive)}.mobile-group-title{display:flex;justify-content:space-between;align-items:center}.mobile-group-title a{display:block;flex:1;padding:0.6rem 1.25rem;color:var(--couleur-craie);text-decoration:none;font-size:0.9rem}.mobile-group-title a:hover{color:var(--couleur-craie-vive)}.mobile-toggle{background:none;border:none;color:var(--couleur-craie);cursor:pointer;padding:0.6rem 1rem;font-size:0.7rem}.mobile-sub{display:none}.mobile-sub.ouvert{display:block}.mobile-sub a{display:block;padding:0.4rem 1.25rem 0.4rem 2.25rem;color:var(--couleur-craie);text-decoration:none;font-size:0.84rem}.mobile-sub a:hover{color:var(--couleur-craie-vive)}.site-body::before{width:calc(100vw - 2rem);left:50%;transform:translateX(-50%)}.parchment{padding:1.5rem 1rem 3rem;max-width:calc(100vw - 2rem)}.cards{grid-template-columns:1fr}.cards.cards-4{grid-template-columns:repeat(2,1fr)}.services-grid{grid-template-columns:1fr}.stats-bar{gap:1.5rem;padding:1.5rem}.stat-number{font-size:1.5rem}.filter-bar{flex-direction:column}.filter-bar select{width:100%}.pdf-item{flex-direction:column;align-items:flex-start}.btn-download{align-self:flex-end}.footer-inner{flex-direction:column;text-align:center;gap:0.25rem}.footer-right{flex-wrap:wrap;justify-content:center}.error-links{flex-direction:column;align-items:center}.tarif-cards{flex-direction:column}.tarif-card{min-width:0}.service-form{max-width:100%}.tarifs-grid{overflow-x:auto}.tarifs-grid table{min-width:480px}.math-row,.math-row-center{flex-direction:column}.math-row>div,.math-row-center>div{width:100%;text-align:center}.math-row>div ol,.math-row>div ul,.math-row-center>div ol,.math-row-center>div ul{text-align:left}.math-grid{grid-template-columns:1fr;justify-items:center;text-align:center}.math-table,.math-table>tbody,.math-table>tbody>tr,.math-table>tbody>tr>td,.math-table>tr,.math-table>tr>td{display:block;width:100%!important}.math-table>tbody>tr>td,.math-table>tr>td{padding:0.25rem 0}.math-cours{font-size:0.85rem;word-break:break-word;overflow-wrap:break-word}.math-exemple,.math-definition,.math-texte,.math-demonstration,.math-correction,.math-remarque,.math-propriete,details.math-correction{overflow-x:hidden;max-width:100%;padding:0.5rem 0.6rem}mjx-container{max-width:100%;overflow-x:hidden}.parchment img,.math-cours img{max-width:100%!important;height:auto!important}.math-grid{grid-template-columns:repeat(2,1fr);gap:0.5rem}br.mobile-br{display:inline}.math-figure:has(+ .math-figure),.math-figure + .math-figure{display:block;width:100%}.table-scroll{overflow-x:auto;max-width:100%;-webkit-overflow-scrolling:touch}.math-cours table:not(.math-table):not(.math-table-center):not(.math-variation):not(.math-signe){font-size:0.82rem;table-layout:auto}.math-cours table td,.math-cours table th{white-space:nowrap}.math-cours table img{max-width:100%!important}.fiche-nav-prevnext{flex-direction:column;gap:0.5rem}.fiche-nav-prev,.fiche-nav-next{max-width:100%;text-align:left}}