/* Page d'accueil Chess Take Off : clair et aéré (inspiré de Chess.com), avec l'idée du décollage :
   un ciel de nuit qui s'éclaire à l'horizon, l'échiquier en piste de décollage, un pion-fusée qui s'envole. */
body { overflow-x: hidden; }
.accueil { display: grid; grid-template-columns: 236px minmax(0, 1fr); min-height: 100vh; }
.accueil a.btn { text-decoration: none; display: inline-flex; align-items: center; justify-content: center; gap: 10px; }
.bascule { background: rgba(255, 255, 255, .07); border: 1px solid var(--bord); color: #fff; border-radius: 8px;
           padding: 6px 10px; font-size: 12.5px; font-weight: 700; white-space: nowrap; text-decoration: none; }

/* ----- Le bouton de décollage (propulsion) ----- */
.btn.decoller { background: var(--degrade-propulsion); border: 0; color: #1f1206; font-weight: 800;
                box-shadow: 0 10px 28px -8px rgba(251, 146, 60, .55); transition: transform .12s, box-shadow .2s, filter .2s; }
.btn.decoller:hover { filter: brightness(1.06); box-shadow: 0 14px 36px -8px rgba(251, 146, 60, .7); }
.btn.decoller .fleche-decollage { display: inline-block; transition: transform .25s; }
.btn.decoller:hover .fleche-decollage { transform: translate(3px, -3px); }

/* ----- Menu de gauche ----- */
.menu { position: sticky; top: 0; height: 100vh; display: flex; flex-direction: column; gap: 6px; padding: 18px 12px 16px;
        background: linear-gradient(180deg, rgba(11, 16, 38, .82), rgba(7, 10, 23, .82)); border-right: 1px solid var(--bord); z-index: 20; }
.menu-tete { display: flex; align-items: center; gap: 8px; }
.menu .marque, .pied .marque { font-size: 18px; line-height: 1.2; padding: 4px 8px 14px; }
.burger { display: none; }
.categories { display: flex; flex-direction: column; gap: 2px; }
.cat { position: relative; }
.cat-lien { display: flex; align-items: center; gap: 12px; padding: 10px 12px; border-radius: 10px; color: #e2e8f0;
            text-decoration: none; font-size: 15px; font-weight: 700; }
.cat-icone { width: 26px; text-align: center; font-size: 19px; flex: none; }
.cat-fleche { margin-left: auto; color: var(--muted); font-size: 18px; opacity: 0; transition: opacity .15s, transform .2s; }
.cat:hover .cat-lien, .cat:focus-within .cat-lien { background: rgba(255, 255, 255, .07); color: #fff; }
.cat:hover .cat-fleche, .cat:focus-within .cat-fleche { opacity: 1; }
/* L'aperçu : les fonctions de la catégorie, sans cliquer */
.apercu { position: absolute; left: 100%; top: -8px; width: 330px; margin-left: 10px; padding: 10px; z-index: 40;
          background: #12162b; border: 1px solid var(--bord); border-radius: 16px; box-shadow: 0 24px 60px rgba(0, 0, 0, .65);
          visibility: hidden; opacity: 0; transform: translateX(-6px); transition: opacity .15s, transform .15s, visibility 0s .15s; }
.apercu::before { content: ""; position: absolute; left: -22px; top: 0; bottom: 0; width: 22px; }  /* pont pour la souris */
.cat:hover .apercu, .cat:focus-within .apercu { visibility: visible; opacity: 1; transform: none; transition-delay: .05s; }
.apercu-titre { font-size: 11.5px; font-weight: 800; color: var(--muted); text-transform: uppercase; letter-spacing: .8px;
                padding: 4px 10px 8px; }
.fonction { display: flex; align-items: center; gap: 12px; padding: 9px 10px; border-radius: 10px; color: #fff; text-decoration: none; }
.fonction:hover, .fonction:focus-visible { background: rgba(255, 255, 255, .07); }
.f-icone { font-size: 20px; width: 28px; text-align: center; flex: none; }
.fonction b { display: block; font-size: 14px; }
.fonction small { display: block; font-size: 12px; color: var(--muted); margin-top: 1px; line-height: 1.35; }
.menu-pied { margin-top: auto; display: flex; flex-direction: column; gap: 8px; }
.menu-pied .btn { width: 100%; padding: 11px; font-size: 14px; border-radius: 10px; }
.menu-outils { display: flex; gap: 6px; align-items: center; flex-wrap: wrap; justify-content: center; margin-top: 4px; }

/* ----- Contenu ----- */
.principal { width: 100%; max-width: 1220px; margin: 0 auto; padding: 24px clamp(20px, 3vw, 44px) 32px; }
.principal h2 { font-family: var(--titres); font-size: clamp(26px, 3vw, 40px); font-weight: 800; line-height: 1.15; letter-spacing: -.5px; }
.btn.enorme { font-size: 22px; padding: 19px 28px; border-radius: 16px; width: 100%; max-width: 440px; }
.btn.enorme:active { transform: translateY(2px); }
.btn.moyen { font-size: 15px; padding: 13px 20px; border-radius: 12px; }
.btn.gris:hover { background: rgba(255, 255, 255, .13); }

/* ----- Accroche : une grande carte de ciel ----- */
.hero { position: relative; overflow: hidden; isolation: isolate; border-radius: 28px; border: 1px solid rgba(148, 163, 255, .14);
        display: grid; grid-template-columns: minmax(0, 1.02fr) minmax(0, 1fr); gap: clamp(24px, 3.5vw, 56px); align-items: center;
        min-height: min(760px, calc(100vh - 48px)); padding: clamp(28px, 4vw, 56px) clamp(24px, 4vw, 56px) clamp(96px, 11vw, 140px);
        background: linear-gradient(180deg, #0a0f2b 0%, #141448 38%, #2a1559 70%, #4a1d3f 88%, #6b2a1c 100%);
        box-shadow: 0 40px 80px -30px rgba(0, 0, 0, .8), inset 0 1px 0 rgba(255, 255, 255, .06); }
.ciel { position: absolute; inset: 0; z-index: -1; pointer-events: none; }
.etoiles { position: absolute; inset: 0 0 35% 0;
           background-image: radial-gradient(1.4px 1.4px at 12% 18%, #fff 50%, transparent 52%),
             radial-gradient(1px 1px at 27% 8%, #fff 50%, transparent 52%), radial-gradient(1.2px 1.2px at 41% 26%, #c7d2fe 50%, transparent 52%),
             radial-gradient(1px 1px at 58% 12%, #fff 50%, transparent 52%), radial-gradient(1.6px 1.6px at 73% 22%, #7dd3fc 50%, transparent 52%),
             radial-gradient(1px 1px at 86% 9%, #fff 50%, transparent 52%), radial-gradient(1.2px 1.2px at 93% 31%, #fff 50%, transparent 52%),
             radial-gradient(1px 1px at 6% 42%, #fff 50%, transparent 52%), radial-gradient(1px 1px at 34% 47%, #e0e7ff 50%, transparent 52%),
             radial-gradient(1.3px 1.3px at 66% 44%, #fff 50%, transparent 52%), radial-gradient(1px 1px at 51% 5%, #fff 50%, transparent 52%),
             radial-gradient(1px 1px at 19% 31%, #fff 50%, transparent 52%), radial-gradient(1.1px 1.1px at 81% 51%, #e0e7ff 50%, transparent 52%);
           opacity: .8; animation: scintille 6s ease-in-out infinite alternate; }
.horizon { position: absolute; left: -10%; right: -10%; bottom: -30%; height: 75%;
           background: radial-gradient(ellipse at 30% 100%, rgba(251, 146, 60, .55), rgba(244, 114, 182, .18) 45%, transparent 70%); }
/* La piste : un échiquier vu en perspective, balisé comme une piste de décollage */
.piste { position: absolute; left: -30%; right: -30%; bottom: -2%; height: 46%; transform-origin: 50% 100%;
         transform: perspective(520px) rotateX(64deg);
         background: conic-gradient(rgba(238, 238, 210, .16) 25%, rgba(118, 150, 86, .22) 0 50%,
                                    rgba(238, 238, 210, .16) 0 75%, rgba(118, 150, 86, .22) 0) 0 0 / 96px 96px;
         -webkit-mask-image: linear-gradient(to top, #000 0%, rgba(0, 0, 0, .75) 35%, transparent 92%);
         mask-image: linear-gradient(to top, #000 0%, rgba(0, 0, 0, .75) 35%, transparent 92%);
         animation: roule 2.4s linear infinite; }
.balisage { position: absolute; left: calc(50% - 4px); width: 8px; top: 0; bottom: 0;
            background: repeating-linear-gradient(to top, rgba(253, 230, 138, .95) 0 34px, transparent 34px 96px);
            filter: drop-shadow(0 0 6px rgba(251, 191, 36, .9)); animation: roule 2.4s linear infinite; }
.vol { position: absolute; inset: 0; width: 100%; height: 100%; }
.vol .fusee { filter: drop-shadow(0 0 10px rgba(251, 146, 60, .55)); }
@keyframes roule { from { background-position: 0 0; } to { background-position: 0 96px; } }
@keyframes scintille { from { opacity: .55; } to { opacity: .95; } }

.hero-texte { position: relative; }
.insigne { display: inline-flex; align-items: center; gap: 9px; font-size: 13px; font-weight: 700; color: #e0e7ff;
           background: rgba(56, 189, 248, .1); border: 1px solid rgba(125, 211, 252, .32); padding: 7px 14px; border-radius: 50px;
           margin-bottom: 22px; -webkit-backdrop-filter: blur(6px); backdrop-filter: blur(6px); }
.insigne-point { width: 8px; height: 8px; border-radius: 50%; background: var(--ia); box-shadow: 0 0 0 4px rgba(56, 189, 248, .2);
                 animation: balise 1.6s ease-in-out infinite; }
@keyframes balise { 50% { box-shadow: 0 0 0 7px rgba(56, 189, 248, 0); } }
.hero-texte h1 { font-family: var(--titres); font-size: clamp(40px, 5vw, 70px); line-height: 1.02; font-weight: 800;
                 letter-spacing: -1.6px; margin-bottom: 22px; text-shadow: 0 10px 40px rgba(0, 0, 0, .35); }
.hero-texte h1 em { font-style: normal; background: var(--degrade-propulsion); -webkit-background-clip: text; background-clip: text;
                    color: transparent; padding-right: 4px; }
.hero-texte p { font-size: 17px; line-height: 1.65; color: #d4d9f0; margin-bottom: 30px; max-width: 540px; }
.hero-actions { display: flex; flex-direction: column; gap: 12px; max-width: 440px; }
.hero-actions .btn.moyen { width: 100%; background: rgba(255, 255, 255, .08); -webkit-backdrop-filter: blur(6px); backdrop-filter: blur(6px); }
.instruments { list-style: none; display: flex; flex-wrap: wrap; gap: 8px 10px; margin-top: 26px; }
.instruments li { display: inline-flex; align-items: center; gap: 7px; font-size: 13px; font-weight: 600; color: #e2e8f0;
                  background: rgba(7, 10, 23, .45); border: 1px solid rgba(255, 255, 255, .1); border-radius: 50px; padding: 6px 12px; }
.instr-icone { font-size: 14px; }

.hero-plateau { position: relative; justify-self: center; width: 100%; max-width: 540px; }
.hublot { padding: 10px; border-radius: 22px; background: linear-gradient(145deg, rgba(255, 255, 255, .14), rgba(255, 255, 255, .03));
          border: 1px solid rgba(255, 255, 255, .14); box-shadow: 0 30px 70px -20px rgba(0, 0, 0, .85), 0 0 0 1px rgba(0, 0, 0, .25);
          -webkit-backdrop-filter: blur(4px); backdrop-filter: blur(4px); }
.hero-plateau .plateau { width: 100%; aspect-ratio: 1; border-radius: 14px; border: 0; }
.bulle-coach { margin-top: 14px; min-height: 74px; display: flex; gap: 10px; align-items: flex-start;
               background: rgba(7, 10, 23, .72); border: 1px solid rgba(125, 211, 252, .28); border-radius: 16px;
               padding: 12px 14px; font-size: 14.5px; line-height: 1.5; color: #e2e8f0;
               -webkit-backdrop-filter: blur(8px); backdrop-filter: blur(8px); box-shadow: 0 18px 40px -18px rgba(0, 0, 0, .8); }
.bc-qui { display: inline-flex; align-items: center; gap: 6px; font-weight: 800; color: #7dd3fc; white-space: nowrap; font-size: 13px; padding-top: 1px; }
.bc-qui img { border-radius: 6px; }
.bulle-coach.nouveau .bc-texte { animation: fondu .5s ease-out; }

/* ----- Les trois étapes du décollage : elles montent, comme une trajectoire ----- */
.etapes { padding: 72px 0 8px; }
.chapeau { color: var(--muted); margin: 10px 0 26px; font-size: 15.5px; line-height: 1.55; max-width: 720px; }
.etapes-liste { list-style: none; position: relative; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px;
                align-items: end; padding-top: 56px; }
/* la trajectoire qui relie les étapes : des pointillés qui montent, visibles entre les cartes */
.etapes-liste::before { content: ""; position: absolute; z-index: 0; left: 6%; right: 6%; top: 30px; height: 3px;
                        transform-origin: 0 50%; transform: rotate(-3.2deg); border-radius: 3px;
                        background: repeating-linear-gradient(90deg, rgba(125, 211, 252, .85) 0 6px, transparent 6px 15px);
                        -webkit-mask-image: linear-gradient(90deg, rgba(0, 0, 0, .35), #000);
                        mask-image: linear-gradient(90deg, rgba(0, 0, 0, .35), #000); }
.etape { position: relative; z-index: 1; display: flex; flex-direction: column; gap: 8px; padding: 22px 20px 20px; border-radius: 20px;
         background: linear-gradient(160deg, #1b2050, #0f1229); border: 1px solid rgba(148, 163, 255, .16);
         box-shadow: 0 24px 50px -24px rgba(0, 0, 0, .8); }
.etape:nth-child(2) { transform: translateY(-28px); }
.etape:nth-child(3) { transform: translateY(-56px); border-color: rgba(251, 146, 60, .35); }
.etape-num { position: absolute; top: -14px; left: 20px; width: 30px; height: 30px; border-radius: 50%; display: grid; place-items: center;
             font-weight: 800; font-size: 14px; color: #1f1206; background: var(--degrade-propulsion);
             box-shadow: 0 0 0 5px rgba(7, 10, 23, .9); }
.etape-icone { font-size: 30px; margin-top: 4px; }
.etape b { font-family: var(--titres); font-size: 19px; }
.etape small { color: #c3c9e2; font-size: 14px; line-height: 1.55; }
.etape a { margin-top: auto; padding-top: 6px; color: #7dd3fc; text-decoration: none; font-weight: 700; font-size: 14px; }
.etape a:hover { color: #fff; }

/* ----- La fonction phare : le jumeau IA (toi face à toi-même) ----- */
.jumeau { position: relative; display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr); gap: clamp(24px, 4vw, 56px);
          align-items: center; margin: 56px 0 24px; padding: clamp(24px, 4vw, 48px); border-radius: 28px; overflow: hidden;
          isolation: isolate; border: 1px solid rgba(125, 211, 252, .22);
          background: radial-gradient(600px 300px at 85% 10%, rgba(56, 189, 248, .18), transparent 65%),
                      radial-gradient(500px 300px at 10% 100%, rgba(139, 92, 246, .2), transparent 65%),
                      linear-gradient(160deg, #10163a, #0b0f24); }
.jumeau h2 em { font-style: normal; background: linear-gradient(90deg, #7dd3fc, #c4b5fd); -webkit-background-clip: text;
                background-clip: text; color: transparent; }
.jumeau-texte p { font-size: 16.5px; line-height: 1.65; color: #cbd5e1; margin: 14px 0 18px; max-width: 500px; }
.jumeau-points { list-style: none; display: flex; flex-direction: column; gap: 10px; margin-bottom: 26px; }
.jumeau-points li { display: flex; gap: 12px; align-items: flex-start; font-size: 15px; line-height: 1.45; color: #e2e8f0; }
.jumeau-points span { flex: none; width: 30px; height: 30px; border-radius: 10px; display: grid; place-items: center;
                      background: rgba(125, 211, 252, .12); border: 1px solid rgba(125, 211, 252, .25); font-size: 15px; }
.jumeau .btn.moyen { padding: 14px 22px; }
.duel { display: flex; align-items: center; justify-content: center; gap: 18px; margin-bottom: 18px; }
.duelliste { display: flex; flex-direction: column; align-items: center; gap: 8px; font-size: 13px; color: #e2e8f0; }
.duelliste .visage { width: 74px; height: 74px; border-radius: 50%; display: grid; place-items: center; font-size: 40px;
                     background: linear-gradient(145deg, #2a3366, #151a3d); border: 2px solid rgba(255, 255, 255, .18); }
.duelliste.ia .visage { transform: scaleX(-1); border-color: rgba(125, 211, 252, .7);
                        box-shadow: 0 0 0 5px rgba(56, 189, 248, .12), 0 0 28px rgba(56, 189, 248, .45);
                        filter: hue-rotate(160deg) saturate(1.3); }
.miroir-vs { font-family: var(--titres); font-weight: 800; font-size: 18px; color: #1f1206; background: var(--degrade-propulsion);
             width: 46px; height: 46px; border-radius: 50%; display: grid; place-items: center;
             box-shadow: 0 0 24px rgba(251, 146, 60, .5); }
/* L'exemple d'avatar dessiné (le même visage des deux côtés : c'est ton jumeau), et sa bulle de bande dessinée */
.duel { padding-top: 78px; }
.duelliste img.visage { width: 96px; height: 96px; border-radius: 28px; object-fit: cover; padding: 0; }
.duelliste.ia img.visage { filter: none; transform: scaleX(-1); }
.duelliste.ia { position: relative; }
.bulle-jumeau { position: absolute; right: -6px; bottom: calc(100% + 10px); width: max-content; max-width: 230px;
                background: #fff; color: #0f172a; border-radius: 16px; padding: 9px 13px; font-size: 13px; font-weight: 700;
                line-height: 1.35; box-shadow: 0 12px 28px rgba(0, 0, 0, .45); animation: bulle-jumeau 4s ease-in-out infinite; }
.bulle-jumeau::after { content: ""; position: absolute; right: 48px; bottom: -6px; width: 12px; height: 12px; background: #fff;
                       transform: rotate(45deg); }
@keyframes bulle-jumeau { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-4px); } }

/* ----- Catégories ----- */
.bloc-categories { padding: 40px 0 24px; }
.cartes-categories { display: grid; grid-template-columns: repeat(auto-fill, minmax(228px, 1fr)); gap: 14px; align-items: start; }
.carte-cat { background: var(--card); border: 1px solid var(--bord); border-radius: 18px; padding: 6px;
             transition: border-color .2s, transform .2s; }
.carte-cat:hover, .carte-cat.ouverte { border-color: rgba(125, 211, 252, .4); }
.carte-cat:hover { transform: translateY(-3px); }
.cc-tete { width: 100%; display: flex; gap: 14px; align-items: center; background: none; border: 0; color: #fff; text-align: left;
           padding: 14px 12px 10px; border-radius: 12px; }
.cc-icone { font-size: 28px; width: 54px; height: 54px; display: grid; place-items: center; flex: none; border-radius: 16px;
            background: linear-gradient(145deg, rgba(56, 189, 248, .16), rgba(139, 92, 246, .14)); border: 1px solid rgba(255, 255, 255, .06); }
.cc-titres b { display: block; font-size: 18px; font-family: var(--titres); }
.cc-titres small { display: block; color: var(--muted); font-size: 13px; margin-top: 3px; line-height: 1.4; }
.cc-plus { margin-left: auto; font-size: 24px; color: var(--muted); transition: transform .25s, color .25s; flex: none; }
.carte-cat.ouverte .cc-plus { transform: rotate(45deg); color: var(--propulsion); }
.cc-apercu { display: flex; flex-wrap: wrap; gap: 6px; padding: 2px 12px 14px; }
.puce { font-size: 12px; background: rgba(255, 255, 255, .05); border: 1px solid var(--bord); border-radius: 50px;
        padding: 4px 10px; color: #cbd5e1; }
.puce.plus { color: #7dd3fc; border-color: rgba(125, 211, 252, .35); }
.carte-cat.ouverte .cc-apercu { display: none; }
.cc-detail { display: none; padding: 0 4px 6px; }
.carte-cat.ouverte .cc-detail { display: block; animation: fondu .25s ease-out; }
.f-aller { margin-left: auto; color: var(--muted); padding-left: 8px; }
.fonction:hover .f-aller { color: var(--propulsion); }

/* ----- Vitrines ----- */
.vitrine { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.15fr); gap: clamp(24px, 4vw, 64px); align-items: center;
           padding: 64px 0; }
.vitrine.inverse .v-texte { order: 2; }
.v-texte p { font-size: 16.5px; line-height: 1.65; color: #cbd5e1; margin: 14px 0 26px; max-width: 480px; }
.v-image { position: relative; display: block; }
.v-image::before { content: ""; position: absolute; inset: 8% -4% -6% 8%; z-index: -1; border-radius: 24px;
                   background: radial-gradient(circle at 70% 30%, rgba(139, 92, 246, .35), transparent 60%),
                               radial-gradient(circle at 20% 90%, rgba(251, 146, 60, .25), transparent 55%); filter: blur(30px); }
.v-image img { width: 100%; display: block; border-radius: 16px; border: 1px solid var(--bord);
               box-shadow: 0 30px 60px -12px rgba(0, 0, 0, .75); transition: transform .3s; }
.v-image:hover img { transform: translateY(-4px); }

/* ----- Application ----- */
.appli { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 32px; align-items: center; margin: 40px 0;
         padding: clamp(24px, 4vw, 48px); border-radius: 24px; border: 1px solid rgba(148, 163, 255, .14);
         background: linear-gradient(135deg, rgba(56, 189, 248, .12), rgba(139, 92, 246, .12) 55%, rgba(251, 146, 60, .1)); }
.appli p { font-size: 16px; line-height: 1.6; color: #cbd5e1; margin: 12px 0 22px; max-width: 520px; }
.appli .petit-texte { font-size: 12.5px; color: var(--muted); margin: 12px 0 0; }
.appli-telephone { width: 210px; height: 420px; border: 8px solid #1d2240; border-radius: 34px; overflow: hidden; background: #070a17;
                   box-shadow: 0 30px 60px -10px rgba(0, 0, 0, .8); }
.appli-telephone img { width: 100%; height: 100%; object-fit: cover; object-position: top center; display: block; }

/* ----- Dernier appel : compte à rebours ----- */
.final { position: relative; text-align: center; padding: 76px 0 68px; display: flex; flex-direction: column; align-items: center; gap: 16px; }
.final::before { content: ""; position: absolute; inset: 10% 15% 0; z-index: -1;
                 background: radial-gradient(ellipse at 50% 100%, rgba(251, 146, 60, .22), transparent 65%); }
.final p { color: var(--muted); font-size: 16px; margin-bottom: 12px; }
.compte { display: flex; gap: 14px; font-family: var(--titres); font-weight: 800; font-size: 15px; color: #7dd3fc; }
.compte span { width: 38px; height: 38px; border-radius: 50%; display: grid; place-items: center;
               border: 1px solid rgba(125, 211, 252, .35); background: rgba(56, 189, 248, .08);
               animation: compte 3s steps(1, end) infinite; }
.compte span:nth-child(2) { animation-delay: 1s; }
.compte span:nth-child(3) { animation-delay: 2s; }
@keyframes compte { 0% { background: #fb923c; color: #1f1206; border-color: transparent; box-shadow: 0 0 18px rgba(251, 146, 60, .6); }
                    33.4%, 100% { background: rgba(56, 189, 248, .08); color: #7dd3fc; border-color: rgba(125, 211, 252, .35); box-shadow: none; } }

.pied { display: flex; flex-wrap: wrap; gap: 10px 22px; align-items: center; border-top: 1px solid var(--bord); padding: 22px 0 8px;
        font-size: 13.5px; }
.pied a { color: var(--muted); text-decoration: none; }
.pied a:hover { color: #fff; }
.pied .marque { color: #fff; font-size: 15px; padding: 0; margin-right: auto; }

/* ----- Téléphone et petite tablette : menu en haut, déplié par ☰ ----- */
@media (max-width: 860px) {
  .accueil { grid-template-columns: minmax(0, 1fr); }
  .menu { height: auto; max-height: 100vh; padding: 10px 16px; gap: 0; background: rgba(7, 10, 23, .94);
          border-right: 0; border-bottom: 1px solid var(--bord); -webkit-backdrop-filter: blur(10px); backdrop-filter: blur(10px); }
  .menu-tete { justify-content: space-between; }
  .menu .marque { padding: 6px 0; font-size: 17px; }
  .burger { display: grid; place-items: center; width: 44px; height: 44px; font-size: 20px; color: #fff; border-radius: 12px;
            background: rgba(255, 255, 255, .07); border: 1px solid var(--bord); }
  .categories, .menu-pied { display: none; }
  .menu.deplie { overflow-y: auto; }
  .menu.deplie .categories { display: flex; margin-top: 10px; }
  .menu.deplie .menu-pied { display: flex; margin: 12px 0 6px; }
  .cat-fleche { opacity: 1; }
  .cat.ouvert .cat-fleche { transform: rotate(90deg); }
  .apercu { position: static; width: auto; margin: 2px 0 8px 38px; padding: 4px; box-shadow: none; display: none;
            visibility: visible; opacity: 1; transform: none; transition: none; }
  .apercu::before, .apercu-titre { display: none; }
  .cat.ouvert .apercu { display: block; }
  .principal { padding: 12px 12px 24px; }
  .hero { grid-template-columns: minmax(0, 1fr); min-height: 0; gap: 26px; border-radius: 22px; padding: 26px 18px 110px; }
  .hero-texte h1 { font-size: clamp(38px, 11vw, 52px); letter-spacing: -1px; }
  .hero-texte p { font-size: 16px; margin-bottom: 22px; }
  .hero-actions { max-width: none; }
  .btn.enorme { font-size: 20px; padding: 17px 20px; max-width: none; }
  .hero-plateau { max-width: none; }
  .piste { height: 22%; }
  .etapes { padding-top: 52px; }
  .etapes-liste { grid-template-columns: minmax(0, 1fr); padding-top: 20px; gap: 26px; }
  .etapes-liste::before { display: none; }
  .etape:nth-child(2), .etape:nth-child(3) { transform: none; }
  .jumeau { grid-template-columns: minmax(0, 1fr); padding: 24px 18px; border-radius: 22px; margin-top: 40px; }
  .jumeau .btn.moyen { width: 100%; }
  .vitrine { grid-template-columns: minmax(0, 1fr); padding: 40px 0; gap: 20px; }
  .vitrine.inverse .v-texte { order: 0; }
  .appli { grid-template-columns: minmax(0, 1fr); justify-items: center; text-align: center; }
  .appli p { margin-left: auto; margin-right: auto; }
  .final { padding: 52px 0; }
}
@media (prefers-reduced-motion: reduce) {
  .carte-cat, .v-image img, .apercu, .btn.decoller, .btn.decoller .fleche-decollage { transition: none; }
  .carte-cat:hover, .v-image:hover img { transform: none; }
  .piste, .balisage, .etoiles, .insigne-point, .compte span, .bulle-jumeau { animation: none; }
}