/* ========================================
   PRESENTATION SECTION 
   ======================================== */

#presentation {
    background: linear-gradient(135deg, rgba(var(--bs-light-rgb), 0.8), rgba(var(--bs-white-rgb), 1));
    position: relative;
    overflow: hidden;
}

#presentation::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 30% 80%, rgba(var(--bs-primary-rgb), 0.1) 0%, transparent 50%);
    z-index: 0;
}

#presentation > * {
    position: relative;
    z-index: 1;
}

/* Titre principal */
#presentation h2 {
    color: var(--bs-primary);
    font-weight: 700;
    margin-bottom: 2rem;
}

/* Texte principal */
#presentation .lead {
    color: var(--bs-gray-700);
    font-size: 1.25rem;
    line-height: 1.6;
    margin-bottom: 2rem;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

/* Cards de valeurs */
.value-card {
    background: var(--bs-white);
    border: none;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(var(--bs-primary-rgb), 0.1);
    transition: all 0.3s ease;
    height: 100%;
    position: relative;
    overflow: hidden;
}

.value-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--bs-primary), var(--bs-secondary));
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.value-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(var(--bs-primary-rgb), 0.15);
}

.value-card:hover::before {
    transform: scaleX(1);
}

.value-card h5 {
    color: var(--bs-primary);
    font-weight: 600;
    font-size: 1.25rem;
    margin-bottom: 1rem;
}

.value-card p {
    color: var(--bs-gray-600);
    line-height: 1.5;
    margin: 0;
}

/* Animation d'apparition des cards */
.value-card {
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 0.8s ease-out forwards;
}

.value-card:nth-child(1) { animation-delay: 0.2s; }
.value-card:nth-child(2) { animation-delay: 0.4s; }
.value-card:nth-child(3) { animation-delay: 0.6s; }

/* Icônes de valeurs */
.value-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--bs-primary), var(--bs-secondary));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem auto;
    position: relative;
    box-shadow: 0 4px 15px rgba(var(--bs-primary-rgb), 0.2);
}

.value-icon i {
    color: white;
    font-size: 1.5rem;
}

/* ========================================
   ANIMATIONS
   ======================================== */

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ========================================
   RESPONSIVE - MOBILE
   ======================================== */

@media (max-width: 768px) {
    #presentation h2 {
        font-size: 2rem;
        margin-bottom: 1.5rem;
    }
    
    #presentation .lead {
        font-size: 1.1rem;
        padding: 0 1rem;
        margin-bottom: 1.5rem;
    }
    
    .value-card {
        margin-bottom: 1rem;
    }
    
    .value-icon {
        width: 50px;
        height: 50px;
        margin-bottom: 1rem;
    }
    
    .value-icon i {
        font-size: 1.25rem;
    }
    
    .value-card h5 {
        font-size: 1.1rem;
    }
    
    .value-card p {
        font-size: 0.9rem;
    }
}

@media (max-width: 576px) {
    #presentation {
        padding: 3rem 0;
    }
    
    #presentation .lead {
        font-size: 1rem;
        text-align: center;
    }
}