/* Reset et styles de base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: 
        linear-gradient(rgba(245, 247, 250, 0.80), rgba(245, 247, 250, 0.80)),
        url('hero-background.jpg') center center / cover fixed no-repeat;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* En-tête - TEXTE sur l'image sans bandeau */
.hero {
    background: transparent;
    color: white;
    padding: 20px 20px 20px 20px;
    text-align: center;
    position: relative;
}

/* Logo ECTI en haut à gauche - CARRÉ */
.logo-ecti {
    position: absolute;
    top: 20px;
    left: 20px;
    height: 60px;
    width: auto;
    background: white;
    padding: 5px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
    object-fit: contain;
}

/* Titre en BLEU FONCÉ ECTI avec ombre blanche */
.hero h1 {
    font-size: 2em;
    font-weight: 700;
    margin-bottom: 10px;
    margin-top: 20px;
    color: #0033A0;
    text-shadow: 2px 2px 8px rgba(255, 255, 255, 0.9), 0 0 20px rgba(255, 255, 255, 0.6);
}

/* Sous-titre en BLEU FONCÉ ECTI avec ombre blanche */
.subtitle {
    font-size: 1.15em;
    opacity: 0.95;
    font-weight: 400;
    color: #0033A0;
    text-shadow: 2px 2px 6px rgba(255, 255, 255, 0.9), 0 0 15px rgba(255, 255, 255, 0.5);
}

/* Container - 5 colonnes sur desktop */
.container {
    max-width: 1600px;
    margin: 0 auto;
    padding: 20px 20px;
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 20px;
    flex: 1;
}

/* Cartes principales */
.card {
    background: white;
    border-radius: 16px;
    padding: 25px 15px;
    text-align: center;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.07);
    transition: all 0.3s ease;
    cursor: pointer;
    text-decoration: none;
    color: inherit;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 180px;
    position: relative;
}

.card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.15);
}

/* Icônes principales - TRÈS GRANDES */
.card-icon {
    font-size: 3.5em;
    margin-bottom: 15px;
}

/* Polices AGRANDIES */
.card-title {
    font-size: 1.05em;
    font-weight: 600;
    line-height: 1.2;
}

/* DÉGRADÉS BLEUS ECTI pour les 5 boutons principaux (charte exacte) */
.card-video {
    background: linear-gradient(135deg, #5CBDE6 0%, #009EDE 100%);
}

.card-demo {
    background: linear-gradient(135deg, #009EDE 0%, #0066CC 100%);
}

.card-formateur {
    background: linear-gradient(135deg, #0066CC 0%, #0033A0 100%);
}

.card-pcs-avec {
    background: linear-gradient(135deg, #0033A0 0%, #002470 100%);
}

.card-pcs-sans {
    background: linear-gradient(135deg, #002470 0%, #001850 100%);
}

.card-video .card-title,
.card-demo .card-title,
.card-formateur .card-title,
.card-pcs-avec .card-title,
.card-pcs-sans .card-title {
    color: white;
}

/* Flèche Formateur */
.arrow-down {
    position: absolute;
    bottom: 8px;
    font-size: 0.9em;
    opacity: 0.7;
    animation: bounce 2s infinite;
    color: white;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateY(0); }
    40% { transform: translateY(-8px); }
    60% { transform: translateY(-4px); }
}

/* Sous-menu - FOND TRANSPARENT */
.submenu {
    grid-column: 1 / -1;
    display: none;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    padding: 20px;
    background: transparent;
    border-radius: 16px;
    max-width: 1400px;
    margin: 0 auto;
}

.submenu.active {
    display: grid;
    animation: slideDown 0.4s ease-out;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Cartes du sous-menu */
.card-small {
    min-height: 160px;
    padding: 25px 15px;
    border-radius: 16px;
    background: white;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.07);
    transition: all 0.3s ease;
    cursor: pointer;
    text-decoration: none;
    color: inherit;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.card-small:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.15);
}

/* Icônes sous-menu */
.card-icon-small {
    font-size: 2.5em;
    margin-bottom: 12px;
}

.card-title-small {
    font-size: 1.05em;
    font-weight: 600;
    line-height: 1.2;
    color: white;
}

/* DÉGRADÉS ORANGE/ROUGE ECTI pour le sous-menu (charte exacte) */
.card-principes {
    background: linear-gradient(135deg, #FFB366 0%, #F47920 100%);
}

.card-comprendre {
    background: linear-gradient(135deg, #F47920 0%, #E85D1C 100%);
}

.card-choisir {
    background: linear-gradient(135deg, #E85D1C 0%, #DA291C 100%);
}

.card-agir {
    background: linear-gradient(135deg, #DA291C 0%, #B81F17 100%);
}

/* Footer - TEXTE sur l'image sans bandeau */
.footer {
    background: transparent;
    color: #2D3748;
    padding: 25px 20px;
    text-align: center;
    margin-top: 60px;
    text-shadow: 1px 1px 4px rgba(255, 255, 255, 0.8);
}

.footer p {
    margin: 0;
    font-size: 0.95em;
}

/* Responsive */
@media (max-width: 1400px) {
    .container {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 1000px) {
    .container {
        grid-template-columns: repeat(2, 1fr);
    }
    .submenu {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    body {
        background: 
            linear-gradient(rgba(245, 247, 250, 0.75), rgba(245, 247, 250, 0.75)),
            url('hero-background.jpg') center center / cover fixed no-repeat;
    }
    
    .logo-ecti {
        height: 50px;
        width: auto;
        top: 15px;
        left: 15px;
        padding: 5px;
    }
    
    .hero {
        padding: 15px 15px 15px 15px;
    }
    
    .hero h1 {
        font-size: 1.4em;
        margin-top: 65px;
        color: #0033A0;
        text-shadow: 2px 2px 8px rgba(255, 255, 255, 0.9), 0 0 20px rgba(255, 255, 255, 0.6);
    }
    
    .subtitle {
        font-size: 0.9em;
        color: #0033A0;
        text-shadow: 2px 2px 6px rgba(255, 255, 255, 0.9), 0 0 15px rgba(255, 255, 255, 0.5);
    }
    
    .container {
        grid-template-columns: 1fr;
        padding: 15px 15px;
    }
    
    .card,
    .card-small {
        min-height: 150px;
        padding: 20px 12px;
    }
    
    .card-icon {
        font-size: 3em;
    }
    
    .card-icon-small {
        font-size: 2.2em;
    }
    
    .card-title,
    .card-title-small {
        font-size: 0.95em;
    }
    
    .submenu {
        grid-template-columns: 1fr;
    }
}

/* Accessibilité */
.card:focus,
.card-small:focus {
    outline: 3px solid #009EDE;
    outline-offset: 3px;
}

/* État actif Formateur */
.card-formateur.active {
    transform: scale(0.98);
}

.card-formateur.active .arrow-down {
    transform: rotate(180deg);
    animation: none;
}