/* --- VARIABLES --- */
:root {
    --bg-color: #000000;
    --base-speed: 60s;
    --gap: 12px;
    --img-brightness: 0.8;
    --cols: 5;
}

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

body, html {
    width: 100%; 
    height: 100%;
    background-color: var(--bg-color);
    overflow: hidden;
    font-family: sans-serif;
}

/* --- SECTION HERO --- */
.hero {
    position: relative;
    width: 100%; 
    height: 100vh;
    display: flex; 
    justify-content: center; 
    align-items: center;
    background: var(--bg-color);
    overflow: hidden;
}

/* --- MUR D'IMAGES --- */
.photo-wall {
    position: absolute;
    top: 50%; 
    left: 50%;
    width: 130vw; 
    height: 160vh;
    display: grid;
    grid-template-columns: repeat(var(--cols), 1fr);
    gap: var(--gap);
    z-index: 1;
    transform: translate(-50%, -50%) rotate(-2deg);
}

.column {
    width: 100%; 
    height: 100%;
    display: flex; 
    flex-direction: column;
    overflow: hidden;
}

.track {
    display: flex; 
    flex-direction: column;
    gap: var(--gap);
    /* Animation de descente par défaut */
    animation: slideDown var(--base-speed) linear infinite;
}

/* Les colonnes paires montent */
.column:nth-child(even) .track {
    animation-name: slideUp;
}

.track img {
    width: 100%; 
    display: block;
    object-fit: cover; 
    border-radius: 6px;
    min-height: 25vh; 
    filter: brightness(var(--img-brightness));
    background-color: #111;
}

.h { aspect-ratio: 3/2; }
.v { aspect-ratio: 2/3; }

/* --- ANIMATIONS --- */
@keyframes slideUp {
    0% { transform: translateY(0); }
    100% { transform: translateY(-50%); }
}

@keyframes slideDown {
    0% { transform: translateY(-50%); }
    100% { transform: translateY(0); }
}

/* --- EFFET GRADIENT --- */
.overlay {
    position: absolute; 
    inset: 0;
    background: radial-gradient(circle, rgba(0,0,0,0.1) 0%, rgba(0,0,0,0.4) 40%, rgba(0,0,0,0.8) 80%, #000 100%);
    z-index: 2; 
    pointer-events: none;
}

/* --- LOGO (CORRIGÉ) --- */
.logo-container {
    position: relative; 
    z-index: 99; /* Augmenté pour être certain d'être au-dessus de tout */
    width: 80%; 
    max-width: 450px; 
    text-align: center;
}

.logo-container img { 
    width: 100%; 
    height: auto; 
    /* Correction : On force la luminosité à 1 (100%) et on booste le contraste si besoin */
    filter: brightness(1) contrast(1) drop-shadow(0 0 20px rgba(0,0,0,0.5)); 
    /* Optionnel : si le logo est blanc et semble gris, ajoute ceci : */
    /* filter: brightness(0) invert(1); */ 
}

.logo-container a { 
    display: inline-block; 
    transition: transform 0.3s ease; 
    text-decoration: none;
}

.logo-container a:hover { 
    transform: scale(1.1); 
}

.logo-container img { 
    width: 100%; 
    height: auto; 
    filter: drop-shadow(0 0 10px rgba(255,255,255,0.2)) brightness(1);
}

/* --- RESPONSIVE --- */
@media (max-width: 768px) {
    :root { --cols: 3; }
    .photo-wall { 
        width: 160vw; 
        transform: translate(-50%, -50%) rotate(-3deg); 
    }
    .logo-container { 
        max-width: 240px; 
    }
}