:root{--bleu-nuit: #0a1628;--bleu-ocean: #0c2a4a;--turquoise: #00c5d4;--turquoise-clair: #5ee6ef;--turquoise-pale: #e0fafb;--blanc: #ffffff;--gris-clair: #94a3b8;--erreur: #f87171;--succes: #34d399;--font-titre: "Syne", sans-serif;--font-corps: "DM Sans", sans-serif;--rayon: 12px;--rayon-lg: 20px;--ombre-card: 0 8px 32px rgba(0, 197, 212, .1)}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth}body{font-family:var(--font-corps);background-color:var(--bleu-nuit);color:var(--blanc);line-height:1.6;min-height:100vh;background-image:radial-gradient(ellipse at 20% 50%,rgba(0,197,212,.05) 0%,transparent 60%),radial-gradient(ellipse at 80% 20%,rgba(0,100,200,.08) 0%,transparent 50%)}h1,h2,h3,h4{font-family:var(--font-titre);line-height:1.2}a{color:var(--turquoise);text-decoration:none;transition:color .2s}a:hover{color:var(--turquoise-clair)}.btn-primary{background:linear-gradient(135deg,var(--turquoise),#0090a0);color:var(--bleu-nuit);font-family:var(--font-corps);font-weight:600;font-size:1rem;border:none;border-radius:var(--rayon);padding:.85rem 2rem;cursor:pointer;transition:all .25s;width:100%}.btn-primary:hover{transform:translateY(-2px);box-shadow:0 8px 24px #00c5d466}.btn-primary:disabled{opacity:.5;cursor:not-allowed;transform:none}.btn-secondary{background:transparent;color:var(--turquoise);font-family:var(--font-corps);font-weight:500;font-size:1rem;border:1.5px solid var(--turquoise);border-radius:var(--rayon);padding:.8rem 2rem;cursor:pointer;transition:all .25s;width:100%}.btn-secondary:hover{background:#00c5d41a}.card{background:var(--bleu-ocean);border:1px solid rgba(0,197,212,.15);border-radius:var(--rayon-lg);padding:2rem;box-shadow:var(--ombre-card)}.form-group{display:flex;flex-direction:column;gap:.4rem;margin-bottom:1.2rem}.form-group label{font-size:.875rem;font-weight:500;color:var(--gris-clair)}.form-group input{background:#ffffff0d;border:1.5px solid rgba(0,197,212,.2);border-radius:var(--rayon);padding:.8rem 1rem;color:var(--blanc);font-family:var(--font-corps);font-size:1rem;transition:border-color .2s;outline:none}.form-group input:focus{border-color:var(--turquoise);background:#00c5d40d}.form-group input::placeholder{color:#94a3b880}.alerte-erreur{background:#f871711a;border:1px solid rgba(248,113,113,.3);border-radius:var(--rayon);color:var(--erreur);padding:.75rem 1rem;font-size:.9rem;margin-bottom:1rem}.alerte-succes{background:#34d3991a;border:1px solid rgba(52,211,153,.3);border-radius:var(--rayon);color:var(--succes);padding:.75rem 1rem;font-size:.9rem;margin-bottom:1rem}.page-auth{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:2rem}.page-auth .card{width:100%;max-width:480px}@keyframes fadeUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.fade-up{animation:fadeUp .5s ease forwards}@media (max-width: 768px){.nav-desktop{display:none!important}.nav-hamburger{display:block!important}#presentation{padding-top:80px!important}nav{padding:.5rem 1rem!important}section>div[style*="grid-template-columns: 1fr 1.4fr"]{grid-template-columns:1fr!important;gap:2rem!important}section>div[style*="grid-template-columns: repeat(4, 1fr)"]{grid-template-columns:repeat(2,1fr)!important}section>div[style*="grid-template-columns: 1fr 1fr"]{grid-template-columns:1fr!important}div[style*="minmax(200px"],div[style*="repeat(3, 1fr)"]{grid-template-columns:1fr!important}h1{font-size:2rem!important}h2{font-size:1.8rem!important}div[style*="justifyContent: 'center'"]{flex-wrap:wrap}}