body {
    margin: 0;
    overflow: hidden;
    font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: #0a0c0f;
    color: white;
}
/* fond dynamique avec particules (canvas généré par js) */
#bg-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
    opacity: 0.5;
}
/* conteneur principal three.js (css3d) */
#scene-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 2;
    pointer-events: auto; /* permet l'interaction scroll et drag */
}
/* style de base des cartes (seront appliqués via CSS3D) */
.card {
    width: 240px;
    height: 280px;
    background: rgba(20, 25, 35, 0.75);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border-radius: 28px;
    border: 1px solid rgba(100, 150, 255, 0.2);
    box-shadow: 0 20px 35px -10px rgba(0, 0, 0, 0.7), 0 0 0 1px rgba(120, 180, 255, 0.15) inset, 0 0 22px var(--glow-color, rgba(0, 180, 255, 0.2));
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 20px;
    box-sizing: border-box;
    color: white;
    transition: filter 0.3s ease, box-shadow 0.3s ease;
    cursor: pointer;
    /* effet de reflet subtil */
    position: relative;
    overflow: hidden;
    transform-style: preserve-3d;
    will-change: transform, filter;
}
.card::after {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at 30% 30%, rgba(255,255,255,0.15), transparent 70%);
    opacity: 0.4;
    pointer-events: none;
}
.card i {
    font-size: 4rem;
    margin-bottom: 20px;
    filter: drop-shadow(0 0 15px currentColor);
    transition: transform 0.2s;
}
.card .network-name {
    font-weight: 600;
    font-size: 1.6rem;
    letter-spacing: 1px;
    margin-bottom: 8px;
    background: linear-gradient(135deg, #fff, #b0c4ff);
    background-clip: text;
    -webkit-background-clip: text;          
    -webkit-text-fill-color: transparent;
}
.card .handle {
    font-size: 1rem;
    opacity: 0.8;
    background: rgba(255,255,255,0.1);
    padding: 6px 14px;
    border-radius: 40px;
    backdrop-filter: blur(4px);
    border: 1px solid rgba(255,255,255,0.15);
    margin-top: 10px;
}
/* couleurs spécifiques pour glow */
.card[data-network="facebook"] { --glow-color: rgba(24, 119, 242, 0.5); }
.card[data-network="instagram"] { --glow-color: rgba(228, 64, 95, 0.5); }
.card[data-network="tiktok"] { --glow-color: rgba(255, 255, 255, 0.6); }
.card[data-network="linkedin"] { --glow-color: rgba(10, 102, 194, 0.5); }
.card[data-network="telegram"] { --glow-color: rgba(38, 165, 228, 0.5); }
.card[data-network="whatsapp"] { --glow-color: rgba(37, 211, 102, 0.5); }
.card[data-network="github"] { --glow-color: rgba(245, 245, 245, 0.5); }
.card[data-network="email"] { --glow-color: rgba(234, 67, 53, 0.5); }
.card[data-network="x"] { --glow-color: rgba(0, 0, 0, 0.7); }

.card[data-network="facebook"] i { color: #1877f2; }
.card[data-network="instagram"] i { color: #e4405f; }
.card[data-network="tiktok"] i { color: #ffffff; text-shadow: 0 0 10px #69c9d0, 0 0 20px #ee1d52; }
.card[data-network="linkedin"] i { color: #0a66c2; }
.card[data-network="telegram"] i { color: #26a5e4; }
.card[data-network="whatsapp"] i { color: #25d366; }
.card[data-network="github"] i { color: #f5f5f5; }
.card[data-network="email"] i { color: #ea4335; }

/* flou et atténuation pour cartes éloignées (appliqué dynamiquement via js) */
.card.blurred {
    filter: blur(2px) brightness(0.6);
    opacity: 0.7;
}
.card.active {
    filter: brightness(1.2) drop-shadow(0 0 25px var(--glow-color, rgba(0, 180, 255, 0.6)));
    border-color: rgba(100, 200, 255, 0.6);
    box-shadow: 0 30px 50px -10px black, 0 0 0 2px rgba(100, 200, 255, 0.4) inset, 0 0 40px var(--glow-color, rgba(0, 180, 255, 0.45));
}
/* loader discret pour éviter FOUC */
.loading {
    position: fixed;
    bottom: 20px;
    right: 20px;
    color: rgba(255,255,255,0.3);
    font-size: 0.8rem;
    z-index: 10;
    pointer-events: none;
}