/* --- RESET & BASE --- */
* { margin: 0; padding: 0; box-sizing: border-box; }

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    background-color: #f8f9fa;
    color: #333;
    overflow-x: hidden;
}

/* --- NAVIGATION --- */
header {
    background: linear-gradient(135deg, #1e88e5, #1565c0);
    color: white;
    padding: 0.8rem 0;
    position: sticky;
    top: 0;
    z-index: 1000;
}
nav {
    max-width: 1100px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 2rem;
}
.logo-link { display: flex; align-items: center; gap: 12px; text-decoration: none; color: white; }
.logo-img { height: 45px; width: auto; border-radius: 8px; background-color: white; }
.logo { font-size: 1.6rem; font-weight: bold; color: white; }
.nav-links { display: flex; gap: 2rem; list-style: none; }
.nav-links a { color: white; text-decoration: none; font-weight: 500; }

/* --- HERO (STRUCTURE CONSERVÉE AVEC QR CODE COALIGNÉ) --- */
.hero {
    background: linear-gradient(rgba(0,0,0,0.6), rgba(0,0,0,0.6)), url('https://images.unsplash.com/photo-1512428559087-560fa5ceab42?ixlib=rb-1.2.1&auto=format&fit=crop&w=1350&q=80');
    background-size: cover; background-position: center;
    color: white; padding: 100px 20px;
    display: flex; justify-content: center; align-items: center;
}
.hero-container {
    max-width: 1100px; width: 100%;
    display: flex; align-items: center; justify-content: space-between;
    gap: 40px; text-align: left;
}
.hero-qrcode { flex: 0 0 auto; margin-left: 20px; }
.qrcode-img {
    width: 180px; height: auto; border-radius: 12px;
    box-shadow: 0 8px 25px rgba(0,0,0,0.3);
    background-color: white; padding: 10px; display: block;
}
.hero-content { flex: 1; }
.hero h1 { font-size: 3rem; margin-bottom: 1rem; }
.hero p { font-size: 1.2rem; margin-bottom: 2rem; max-width: 700px; }

.btn {
    background: #42a5f5; color: white; padding: 14px 30px; border: none;
    border-radius: 50px; cursor: pointer; box-shadow: 0 4px 15px rgba(0,0,0,0.2);
}
.container { max-width: 1100px; margin: 0 auto; padding: 3rem 2rem; }
.features { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 2rem; }
.feature-card { background: white; padding: 2rem; border-radius: 10px; text-align: center; box-shadow: 0 4px 6px rgba(0,0,0,0.05); }

/* --- CARROUSEL (VUE ORDINATEUR) --- */
.preview-section { background-color: #f1f3f5; width: 100%; padding: 3rem 0; }
.gallery-container {
    align-items: center; display: flex;
    height: 500px; margin: 0 auto; max-width: 600px; position: relative;
}
.gallery-item {
    height: 100%; width: auto; object-fit: contain;
    opacity: 0; position: absolute; transition: all 0.4s ease-in-out;
    z-index: 0; border-radius: 15px;
}
.gallery-item-1 { left: 25%; height: 70%; opacity: 0.4; transform: translateX(-50%); z-index: 1; }
.gallery-item-2 { left: 38%; height: 85%; opacity: 0.7; transform: translateX(-50%); z-index: 1; }
.gallery-item-3 { left: 50%; height: 100%; opacity: 1; transform: translateX(-50%); z-index: 2; box-shadow: 0 10px 30px rgba(0,0,0,0.3); }

/* --- FOOTER --- */
footer { background: #222; color: white; text-align: center; padding: 2rem 0; }
.footer-links a { color: #aaa; margin: 0 10px; text-decoration: none; }

/* --- ADAPTATION MOBILE --- */
@media (max-width: 768px) {
    .menu-toggle { display: flex; flex-direction: column; gap: 5px; cursor: pointer; }
    .menu-toggle .bar { width: 25px; height: 3px; background: white; }
    .nav-links { 
        display: none; position: absolute; top: 65px; left: 0; 
        width: 100%; background: #1565c0; flex-direction: column; padding: 1rem; 
    }
    .nav-links.active { display: flex; }
    
    .hero-container { flex-direction: column-reverse; text-align: center; gap: 30px; }
    .hero-qrcode { margin-left: 0; }
    .qrcode-img { width: 150px; margin: 0 auto; }
    .hero h1 { font-size: 2.2rem; }
    .hero p { font-size: 1rem; }

    .gallery-container { height: 350px !important; }
    .gallery-item { height: 100% !important; width: auto !important; }
    .gallery-item-1 { left: 15% !important; height: 70% !important; }
    .gallery-item-2 { left: 32% !important; height: 85% !important; }
    .gallery-item-3 { left: 50% !important; height: 100% !important; }
}