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@media(min-width:1550px){.hero{padding-top:95px}.hero h1{font-size:88px}}
@media(max-width:1100px){.app-grid{grid-template-columns:120px 170px 1fr}.app-context{display:none}.product-stage{padding:0}.case-layout{gap:35px}.nav-links{gap:17px}.learning-grid{gap:40px}.nav-actions{gap:18px}.brand{font-size:18px}}
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@media(max-width:480px){.container{width:calc(100% - 32px)}.hero h1{font-size:45px;letter-spacing:-2px}.hero-description{font-size:14px}.actions{gap:12px}.hero .actions .btn{width:100%}.reassurance{gap:12px;font-size:9px}.app-grid{display:block}.app-sidebar{display:none}.app-top{font-size:8px;padding:10px 13px}.app-reader{padding:15px}.reply p{font-size:10px}.stage-caption span:last-child{display:none}.system-strip{gap:22px;font-size:11px}.section-title{font-size:35px}.case-steps{grid-template-columns:1fr}.case-step{padding:12px 14px}.case-step small{font-size:11px}.case-step b{font-size:14px}.case-screen-body{padding:20px}.case-screen h3{font-size:23px}.case-message{font-size:12px;padding:16px}.feature-grid{grid-template-columns:1fr}.lifestyle-copy{max-width:290px}.lifestyle h2{font-size:39px}.lifestyle p{font-size:13px}.lifestyle{min-height:500px}.learning-card-title{font-size:12px;gap:10px}.final .section-title{font-size:34px}.brand{font-size:17px}.brand small{font-size:17px}.brand-symbol{width:30px;height:32px}.nav .btn .arrow{display:none}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.btn{transition:none}.btn:hover{transform:none}}

/* Ajouts : problème + calculateur, comparatif, chapitres vidéo */
.visually-hidden{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.probleme-grid{display:grid;grid-template-columns:1fr 1fr;gap:70px;align-items:center}
.parcours{list-style:none;padding:0;margin:30px 0 0;display:flex;flex-wrap:wrap;gap:8px;counter-reset:etape}
.parcours li{counter-increment:etape;background:#fff;border:1px solid #dce3ef;border-radius:8px;padding:9px 12px;font-size:12px;color:#43546e;position:relative}
.parcours li:before{content:counter(etape);display:inline-grid;place-items:center;width:18px;height:18px;border-radius:50%;background:#e6eeff;color:#3e6dc9;font-size:10px;font-weight:700;margin-right:8px}
.parcours-fin{margin-top:18px!important;font-size:13px;font-weight:600;color:#3978ff}
.calcul{background:#fff;border:1px solid #dbe3f0;border-radius:14px;padding:30px;box-shadow:0 20px 70px #264f8514}
.calcul h3{font-size:18px;font-weight:650;margin-bottom:22px}
.calcul label{display:flex;justify-content:space-between;align-items:baseline;gap:12px;font-size:13px;color:#43546e;margin-top:18px}
.calcul output{font-size:22px;font-weight:650;color:#15213b;font-variant-numeric:tabular-nums}
.calcul input[type=range]{width:100%;margin:10px 0 0;accent-color:#3978ff;height:28px}
.calcul-resultat{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:24px}
.calcul-resultat p{background:#f1f5fd;border-radius:10px;padding:16px}
.calcul-resultat strong{display:block;font-size:30px;font-weight:650;letter-spacing:-1px;color:#194bab;font-variant-numeric:tabular-nums}
.calcul-resultat span{font-size:11px;color:#6b7890}
.calcul-formule{margin-top:16px!important;font-size:13px;color:#15213b;border-left:3px solid #3978ff;padding-left:12px}
.calcul-note{margin-top:14px!important;font-size:10px;color:#7d8aa0;line-height:1.6}
.comparatif-cadre{overflow-x:auto;border:1px solid #ffffff14;border-radius:14px;background:#0d1627}
.comparatif{width:100%;border-collapse:collapse;font-size:13px;min-width:640px}
.comparatif th,.comparatif td{padding:15px 18px;border-bottom:1px solid #ffffff0c;text-align:left}
.comparatif thead th{font-size:11px;letter-spacing:1px;text-transform:uppercase;color:#8095b5;font-weight:600}
.comparatif tbody th{font-weight:500;color:#dfe8fb;width:32%}
.comparatif td{color:#8ea2c0}
.comparatif tr:last-child th,.comparatif tr:last-child td{border-bottom:0}
.comparatif .nous{background:#15264a;color:#e9f1ff}
.comparatif thead .nous{color:#9fc2ff}
.comparatif td.oui:before{content:'✓ ';color:#7bdcc4;font-weight:700}
.comparatif td.non{color:#5f7291}
.comparatif td.non:before{content:'✕ ';color:#b56b7a}
.chapitres{display:grid;grid-template-columns:repeat(6,1fr);gap:8px;margin-top:14px}
.chapitre{background:#0f192b;border:1px solid #ffffff12;border-radius:9px;padding:11px 12px;text-align:left;color:#9fb1cc;cursor:pointer;display:flex;flex-direction:column;gap:4px}
.chapitre b{font-size:12px;font-weight:550;color:#dfe8fb;line-height:1.3}
.chapitre small{font-size:10px;color:#6f86a8}
.chapitre.essentiel{border-color:#3978ff;background:#15264a}
.chapitre[aria-pressed=true]{border-color:#89e5ed;background:#16304f}
@media(max-width:1100px){.chapitres{grid-template-columns:repeat(3,1fr)}}
@media(max-width:800px){.probleme-grid{grid-template-columns:1fr;gap:35px}.calcul{padding:22px}.calcul-resultat strong{font-size:25px}.chapitres{grid-template-columns:repeat(2,1fr)}}
@media(max-width:800px){
.comparatif-cadre{overflow:visible;border:0;background:transparent}
.comparatif{min-width:0;display:block}
.comparatif thead{display:none}
.comparatif tbody,.comparatif tr{display:block}
.comparatif tr{border:1px solid #ffffff14;border-radius:12px;background:#0d1627;margin-bottom:10px;overflow:hidden}
.comparatif tbody th{display:block;width:auto;padding:14px 16px 10px;border:0;font-size:14px}
.comparatif td{display:flex;justify-content:space-between;gap:14px;padding:9px 16px;border:0;border-top:1px solid #ffffff0a;font-size:12px;text-align:right}
.comparatif td:after{content:attr(data-label);order:-1;text-align:left;color:#6f86a8;font-size:11px;text-transform:uppercase;letter-spacing:.6px;flex-shrink:0}
.comparatif td.oui:before,.comparatif td.non:before{margin-left:auto}
}
/* Vidéo de présentation, juste sous le titre de la page */
.hero-video{max-width:860px;margin:6px auto 30px;box-shadow:0 30px 80px #00000070}.hero-video video{background:#0b1322}
@media(max-width:800px){.hero-video{margin:0 auto 24px;border-radius:12px}}