:root {
    --bg-color: #121212;
    --card-bg: rgba(20, 20, 20, 0.6);
    --card-border: rgba(255, 255, 255, 0.1);
    --text-primary: #ffffff;
    --text-secondary: #aaaaaa;
    --font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
}

body {
    margin: 0;
    padding: 0;
    font-family: var(--font-family);
    background-color: var(--bg-color);
    background-image: url('images/wallpaper.jpg');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center; /* Centre verticalement si peu de contenu */
}

.main-wrapper {
    width: 100%;
    max-width: 1600px;
    padding: 40px 20px;
    box-sizing: border-box;
}

.container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 30px;
    width: 100%;
    justify-content: center;
}

.card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 20px;
    padding: 25px 15px;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-decoration: none;
    color: var(--text-primary);
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.3);
    position: relative;
    overflow: hidden;
}

/* Effet de lueur colorée au hover via pseudo-élément */
.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    border-radius: 20px;
    padding: 2px; /* épaisseur de la bordure */
    background: linear-gradient(45deg, transparent, var(--hover-color, white), transparent);
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.card:hover {
    transform: translateY(-8px) scale(1.05);
    background: rgba(40, 40, 40, 0.8);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.4), 0 0 20px var(--hover-color, rgba(255,255,255,0.1));
    border-color: var(--hover-color, white);
}

.card:hover::before {
    opacity: 1;
}

.icon-container {
    width: 80px;
    height: 80px;
    margin-bottom: 20px;
    display: flex;
    justify-content: center;
    align-items: center;
    filter: drop-shadow(0 4px 6px rgba(0,0,0,0.3));
    transition: transform 0.3s ease;
}

.card:hover .icon-container {
    transform: scale(1.1);
}

.icon-container img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    border-radius: 12px; /* Pour arrondir légèrement les icones carrées */
}

.card-content {
    text-align: center;
    width: 100%;
    z-index: 1;
}

.card h4 {
    margin: 0;
    font-size: 1.1rem;
    font-weight: 600;
    letter-spacing: 0.5px;
    text-shadow: 0 2px 4px rgba(0,0,0,0.5);
}

/* Responsive adjustments */
@media (max-width: 600px) {
    .container {
        grid-template-columns: repeat(2, 1fr); /* 2 colonnes sur mobile */
        gap: 15px;
    }
    
    .card {
        padding: 15px 10px;
    }
    
    .icon-container {
        width: 60px;
        height: 60px;
        margin-bottom: 10px;
    }
    
    .card h4 {
        font-size: 0.9rem;
    }
}