/* --- GOOGLE FONTS --- */
@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@400;600;700;800&display=swap');

/* --- VARIABLES --- */
:root {
    --primary: #DA251D; /* Rouge Lyon */
    --primary-hover: #b81c15;
    --secondary: #1d4ed8; /* Bleu Lyon moderne */
    --secondary-hover: #1e40af;
    --bg-main: #0f172a; /* Dark sleek background */
    --bg-card: #1e293b;
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --border-color: rgba(255, 255, 255, 0.08);
    --transition: all 0.2s ease-in-out;
}

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

body {
    background-color: var(--bg-main);
    color: var(--text-main);
    font-family: 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
    margin: 0;
    padding: 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
}

/* --- CONTAINER PRINCIPAL --- */
.accueil-container {
    text-align: center;
    width: 100%;
    max-width: 900px;
    padding: 20px;
}

.accueil-title {
    font-size: 2.2rem;
    font-weight: 800;
    letter-spacing: -0.5px;
    text-transform: uppercase;
    color: #ffffff;
    margin-bottom: 8px;
}

.accueil-subtitle {
    font-size: 2rem;
    padding-top: 30px;
    font-weight: bold;
    font-weight: 600;
    color: var(--text-muted);
    margin-top: 0;
    margin-bottom: 40px;
}

/* --- LE SYSTÈME DE GRILLE --- */
.choix-groupes {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); 
    gap: 16px;
    width: 100%;
    margin: 0 auto;
}

/* --- STYLE DES BOUTONS --- */
.bouton-groupe {
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    color: #ffffff;
    font-weight: 700;
    font-size: 0.95rem;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    text-align: center;
    padding: 15px;
    
    height: 100px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.25);
    transition: var(--transition);
}

/* Variations de couleurs */
.btn-rouge { 
    background-color: var(--primary); 
}

.btn-bleu { 
    background-color: var(--secondary); 
}

/* Effets au survol */
.bouton-groupe:hover {
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.4);
    filter: brightness(1.1);
}

.btn-rouge:hover {
    border-color: rgba(218, 37, 29, 0.6);
}

.btn-bleu:hover {
    border-color: rgba(29, 78, 216, 0.6);
}

/* --- BOUTON RETOUR MINIMALISTE --- */
.retour-minimaliste {
    position: absolute;
    top: 24px;
    left: 24px;
    text-decoration: none;
    color: var(--text-muted);
    font-size: 0.85rem;
    font-weight: 600;
    padding: 8px 14px;
    border-radius: 6px;
    border: 1px solid var(--border-color);
    background: rgba(255, 255, 255, 0.02);
    transition: var(--transition);
}

.retour-minimaliste:hover {
    color: #ffffff;
    border-color: var(--primary);
    background: var(--primary);
}

/* --- RESPONSIVE MOBILE --- */
@media (max-width: 600px) {
    .accueil-container {
        padding-top: 40px;
    }

    .accueil-title {
        font-size: 1.6rem;
    }

    .accueil-subtitle {
        font-size: 0.95rem;
        margin-bottom: 25px;
    }

    .choix-groupes {
        grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
        gap: 12px;
    }

    .bouton-groupe {
        height: 80px;
        font-size: 0.82rem;
    }

    .retour-minimaliste {
        top: 15px;
        left: 15px;
    }
}