/* ---------- Variables & reset ---------- */
:root{
  --clr-primary:#6366f1;      /* indigo-500 */
  --clr-primary-dark:#4f46e5; /* indigo-600 */
  --clr-accent:#a855f7;       /* violet-500 */
  --clr-bg:#f9fafb;           /* gray-50  */
  --clr-surface:#ffffff;      /* white    */
  --clr-muted:#6b7280;        /* gray-500 */
  --radius:14px;
  --shadow-xs:0 2px 4px rgba(0,0,0,.05);
  --shadow-md:0 6px 20px rgba(0,0,0,.08);
}
*,*::before,*::after{box-sizing:border-box;margin:0}
body{font-family:"Inter",system-ui,sans-serif;background:var(--clr-bg);color:#111827;line-height:1.55}
img{max-width:100%;display:block}
a{text-decoration:none;color:inherit}

/* ---------- Utilities ---------- */
.container{width:min(90%,1200px);margin-inline:auto}
.btn{display:inline-flex;align-items:center;gap:.5rem;padding:.75rem 1.5rem;
     border-radius:var(--radius);font-weight:500;transition:background .25s,box-shadow .25s}
.btn-primary{background:var(--clr-primary);color:#fff}
.btn-primary:hover{background:var(--clr-primary-dark)}
.btn-outline{background:transparent;border:2px solid var(--clr-primary);color:var(--clr-primary)}
.btn-outline:hover{background:var(--clr-primary);color:#fff}
.text-muted{color:var(--clr-muted)}

/* ---------- Header ---------- */
header{background:var(--clr-surface);box-shadow:var(--shadow-xs);position:sticky;top:0;z-index:10}
.nav{display:flex;align-items:center;justify-content:space-between;padding-block:1rem}
.brand{display:flex;align-items:center;gap:.5rem;font-family:"Poppins",sans-serif;font-size:1.125rem;font-weight:700;color:var(--clr-primary)}
.brand-small{font-size:1rem;gap:.25rem}
nav ul{list-style:none;display:flex;gap:2rem}
nav li{font-size:.95rem}
nav a{transition:color .25s}
nav a:hover{color:var(--clr-primary)}
.auth-actions{display:flex;gap:.75rem}
.user-greeting{align-self:center;font-size:.9rem;color:var(--clr-muted)}

/* ---------- Hero ---------- */
.hero{padding-block:clamp(4rem,10vw,8rem);display:grid;grid-template-columns:1fr 1fr;gap:3rem;align-items:center}
.hero h1{font-family:"Poppins",sans-serif;font-size:clamp(2.5rem,5vw,3.5rem);line-height:1.15;
         background:linear-gradient(90deg,var(--clr-primary) 0%,var(--clr-accent) 100%);
         -webkit-background-clip:text;color:transparent;margin-bottom:1rem}
.hero p{font-size:1.05rem;color:var(--clr-muted);margin-bottom:2rem}
.hero-image{position:relative;isolation:isolate}
.hero-image::before{content:"";position:absolute;inset:0;
                    background:linear-gradient(135deg,var(--clr-primary) 0%,var(--clr-accent) 100%);
                    filter:blur(60px);opacity:.3;border-radius:var(--radius);z-index:-1}
.hero-actions{display:flex;gap:1rem;flex-wrap:wrap}

/* ---------- Features ---------- */
.features{padding-block:clamp(3rem,8vw,6rem)}
.features-grid{display:grid;gap:2rem;grid-template-columns:repeat(auto-fit,minmax(250px,1fr))}
.card{background:var(--clr-surface);border-radius:var(--radius);box-shadow:var(--shadow-md);
      padding:2rem;position:relative;transition:transform .3s,box-shadow .3s}
.card:hover{transform:translateY(-6px);box-shadow:0 10px 25px rgba(0,0,0,.1)}
.icon-wrapper{width:48px;height:48px;display:grid;place-items:center;border-radius:50%;
              background:var(--clr-primary);color:#fff;margin-bottom:1rem}
.card h3{font-size:1.25rem;margin-bottom:.75rem}
.card p{color:var(--clr-muted);font-size:.95rem}

/* cadenas */
.lock-overlay{position:absolute;inset:0;display:grid;place-content:center;
              background:rgba(255,255,255,.7);backdrop-filter:blur(1px);border-radius:var(--radius)}
.lock-overlay svg{width:38px;height:38px;stroke:var(--clr-muted)}

/* ---------- Footer ---------- */
footer{background:var(--clr-surface);padding-block:3rem 2rem;border-top:1px solid #e5e7eb;font-size:.9rem}
.footer-flex{display:grid;gap:1.5rem;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));align-items:center}
.footer-links{display:flex;gap:1rem;flex-wrap:wrap}
.footer-links a{color:var(--clr-muted)}

/* ---------- Responsive ---------- */
@media(max-width:768px){
  nav ul {
    display: none !important; /* Force la disparition des liens du menu sur mobile */
  }
  nav {
    display: none; /* Masque complètement l'élément nav pour plus de sécurité */
  }
  .hero{grid-template-columns:1fr;text-align:center}
  .hero-image{order:-1}
  .auth-actions {
    flex-direction: row; /* Force les boutons sur une ligne */
    justify-content: flex-end; /* Aligne les boutons à droite */
    gap: 0.5rem; /* Réduit l'espacement entre les boutons */
  }
  .auth-actions .btn {
    padding: 0.5rem 1rem; /* Taille réduite pour les boutons */
    font-size: 0.85rem; /* Taille de police réduite */
    text-align: center; /* Centre le texte dans les boutons */
  }
}