* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Avenir', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #111;
    color: #f4f4f4;
    overflow-x: hidden;
    overflow-y: scroll;
}

body.scrolled-mode,
body.page-mode {
    overflow-y: auto;
}

/* --- SECTION HERO (Accueil uniquement - Totalement fixe) --- */
#hero-section {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: 1;
    overflow: hidden;
    background-color: #000;
    transition: opacity 1s cubic-bezier(0.25, 1, 0.5, 1);
}

body.scrolled-mode #hero-section,
body.page-mode #hero-section {
    opacity: 0;
    pointer-events: none;
}

.video-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.4s ease-in;
}

#hero-section.video-loaded .video-container {
    opacity: 1;
}

.video-container iframe {
    width: 100vw;
    height: 56.25vw;
    min-height: 100vh;
    min-width: 177.77vh;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.hero-title {
    position: absolute;
    bottom: 80px;
    left: 40px;
    font-family: 'Avenir', sans-serif;
    font-size: clamp(1.8rem, 4vw, 3.5rem);
    color: #fff;
    text-shadow: 2px 2px 10px rgba(0, 0, 0, 0.8), 0 0 20px rgba(0, 0, 0, 0.5);
    z-index: 2;
    font-weight: 700;
    transition: opacity 0.3s ease;
}

body.scrolled-mode .hero-title,
body.page-mode .hero-title {
    opacity: 0;
}

/* --- BANDEAU MENU PRINCIPAL ET SOUS-MENUS --- */
#main-header {
    position: fixed;
    left: 0;
    width: 100%;
    background-color: rgba(18, 18, 18, 0.95);
    backdrop-filter: blur(10px);
    z-index: 100;
    transition: top 1s cubic-bezier(0.25, 1, 0.5, 1), bottom 1s cubic-bezier(0.25, 1, 0.5, 1);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

#main-header nav ul.main-menu {
    display: flex;
    justify-content: center;
    align-items: center;
    list-style: none;
    flex-wrap: wrap;
    padding: 20px 30px;
    gap: 45px;
}

/* Éléments du menu principal */
#main-header nav ul.main-menu>li {
    position: relative;
}

#main-header nav ul.main-menu li a {
    font-family: 'Avenir', sans-serif;
    color: #bbb;
    text-decoration: none;
    text-transform: uppercase;
    font-size: 0.9rem;
    font-weight: 600;
    letter-spacing: 1.5px;
    transition: color 0.3s;
    display: block;
    padding: 8px 0;
}

#main-header nav ul.main-menu li a:hover,
#main-header nav ul.main-menu li a.active {
    color: #fff;
}

/* --- SOUS-MENUS --- */
.submenu {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    background-color: rgba(22, 22, 22, 0.98);
    backdrop-filter: blur(10px);
    list-style: none;
    min-width: 240px;
    padding: 12px 0;
    border-radius: 6px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.8);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease, transform 0.3s ease;
    z-index: 101;
}

.has-submenu:hover .submenu {
    opacity: 1;
    visibility: visible;
}

.submenu li {
    padding: 0;
}

.submenu li a {
    font-family: 'Avenir', sans-serif;
    padding: 12px 20px;
    font-size: 0.8rem;
    color: #aaa;
    white-space: nowrap;
    letter-spacing: 1px;
    transition: background-color 0.2s, color 0.2s;
}

.submenu li a:hover,
.submenu li a.active {
    background-color: rgba(255, 255, 255, 0.08);
    color: #fff;
}

/* Positionnement dynamique des sous-menus */
body.home-mode .submenu {
    bottom: calc(100% + 15px);
    transform: translateX(-50%) translateY(10px);
}

body.home-mode .has-submenu:hover .submenu {
    transform: translateX(-50%) translateY(0);
}

body.scrolled-mode .submenu,
body.page-mode .submenu {
    top: calc(100% + 15px);
    transform: translateX(-50%) translateY(-10px);
}

body.scrolled-mode .has-submenu:hover .submenu,
body.page-mode .has-submenu:hover .submenu {
    transform: translateX(-50%) translateY(0);
}

/* --- LE RETOUR DE LA LOGIQUE D'ORIGINE DU BANDEAU --- */

/* 1. Sur la page d'accueil au repos : le bandeau est en bas de l'écran (sur la vidéo) */
body.home-mode #main-header {
    top: calc(100vh - 70px);
    bottom: auto;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    border-bottom: none;
}

/* 2. Dès qu'on scrolle ou qu'on est sur une page interne : le bandeau monte et se fixe en haut */
body.scrolled-mode #main-header,
body.page-mode #main-header {
    top: 0;
    bottom: auto;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    border-top: none;
}

/* --- CONTENEUR DES PAGES (Le rideau) --- */
#main-container {
    position: relative;
    width: 100%;
    z-index: 10;
    background-color: #111;
    box-shadow: 0 -20px 40px rgba(0, 0, 0, 0.9);
}

body.home-mode #main-container {
    margin-top: 100vh;
    min-height: 150vh;
    transition: none;

    /* Ancrage strict bidirectionnel */
    scroll-snap-type: y mandatory;

    /* Marge de sécurité pour que l'arrêt se fasse proprement sous le bandeau fixé en haut */
    scroll-padding-top: 140px;
}

body.page-mode #main-container {
    margin-top: 0;
    padding-top: 100px;
    min-height: 100vh;
    transition: none;
    scroll-snap-type: none;
}

.page-content {
    display: none;
    opacity: 0;
    transition: opacity 0.3s ease-in-out;
    padding: 40px 5% 80px 5%;
    max-width: 1200px;
    margin: 0 auto;
}

.page-content.active {
    display: block;
    opacity: 1;
}

/* --- STYLE DE LA PAGE D'ACCUEIL MODULAIRE --- */
.home-content-wrapper {
    display: flex;
    flex-direction: column;
    gap: 120px;
    padding: 20px 0 100px 0;
}

.content-block {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;

    /* Alignement strict sur le haut du bloc et arrêt forcé */
    scroll-snap-align: start;
    scroll-snap-stop: always;
    min-height: 80vh;
}

.content-block.reverse {
    direction: rtl;
}

.content-block.reverse .text-side {
    direction: ltr;
}

.text-side h2 {
    font-family: 'Avenir', sans-serif;
    font-size: clamp(1.8rem, 2.5vw, 2.5rem);
    margin-bottom: 20px;
    color: #fff;
    font-weight: 600;
}

.text-side p {
    font-family: 'Avenir', sans-serif;
    font-size: 1.05rem;
    line-height: 1.7;
    color: #ccc;
}

/* --- CONFIGURATION DES PHOTOS PORTRAIT GÉANTES --- */
.image-side img {
    width: 100%;
    height: 80vh;
    /* Prend 80% de la hauteur de l'écran */
    object-fit: contain;
    /* Affiche l'image en entier sans aucune coupure */
    background-color: #0d0d0d;
    /* Fond harmonisé */
    border-radius: 8px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    transition: transform 0.4s ease;
}

.image-side img:hover {
    transform: scale(1.02);
}

/* Media Queries (Mobile & Tablette) */
@media (max-width: 900px) {
    #main-header nav ul.main-menu {
        gap: 20px;
        padding: 15px;
    }

    #main-header nav ul.main-menu li a {
        font-size: 0.75rem;
    }

    .hero-title {
        bottom: 70px;
        left: 20px;
    }

    .content-block,
    .content-block.reverse {
        grid-template-columns: 1fr;
        direction: ltr;
        gap: 25px;
        min-height: auto;
        scroll-snap-align: none;
        scroll-snap-stop: normal;
    }

    .image-side img {
        height: auto;
        max-height: 70vh;
        object-fit: contain;
    }

    #hero-section.video-loaded .video-container {
        opacity: 1 !important;
    }

    #hero-section .video-container {
        opacity: 1 !important;
    }

    #hero-section video {
        display: block !important;
        opacity: 1 !important;
    }
}