/* Réinitialisation globale et variables */
:root {
    --color-dominant: #1e3526; /* Vert forêt profond */
    --color-light: #ffffff;
    --color-text-dark: #1a1a1a;
    --color-text-light: #f9f9f9;
    --font-family: 'Inter', sans-serif; /* Nouvelle police ultra-épurée */
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    color: var(--color-text-dark);
    line-height: 2; /* Hauteur de ligne augmentée pour aérer le texte */
    overflow-x: hidden;
    font-weight: 200; /* Écriture très fine par défaut */
    letter-spacing: 0.05rem; /* Espacement global des lettres */
}

/* Sections Plein Écran */
.section {
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
    padding: 6rem 2rem; /* Marges internes augmentées pour plus d'espace */
    width: 100%;
}

.container {
    max-width: 1100px; /* Légèrement plus resserré pour un look plus élégant */
    width: 100%;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

/* Alternance des couleurs */
.section-light {
    background-color: var(--color-light);
    color: var(--color-text-dark);
}

.section-dark {
    background-color: var(--color-dominant);
    color: var(--color-text-light);
}

/* Animations de Titres (Scroll) */
.animate-title {
    font-size: 2rem;
    font-weight: 100; /* Titre ultra-fin */
    text-transform: uppercase;
    letter-spacing: 0.6rem; /* Lettres très espacées */
    margin-bottom: 4rem;
    text-align: center;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 1.2s cubic-bezier(0.16, 1, 0.3, 1), transform 1.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.animate-title.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Section 1 : Hero / Accueil */
.section-hero {
    background: url('https://unsplash.com') no-repeat center center/cover;
}

.hero-overlay {
    background-color: rgba(255, 255, 255, 0.9); /* Plus blanc pour masquer le fond */
    padding: 5rem 7rem;
    text-align: center;
    box-shadow: 0 5px 20px rgba(0,0,0,0.02);
}

.hero-overlay h1 {
    font-size: 3rem;
    font-weight: 300;
    color: var(--color-dominant);
    letter-spacing: 0.8rem;
    margin-bottom: 1.5rem;
    opacity: 1;
    transform: none;
}

.hero-subtitle {
    font-size: 1rem;
    font-weight: 100;
    text-transform: uppercase;
    letter-spacing: 0.4rem;
    color: var(--color-text-dark);
    opacity: 0.8;
}

/* Section 2 : Présentation, Carousel & Diplômes */
.presentation-layout {
    gap: 4rem;
}

.presentation-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 6rem; /* Espace augmenté entre le texte et l'image */
    align-items: center;
    width: 100%;
}

.presentation-text {
    font-size: 1rem;
    text-align: justify;
    font-weight: 200;
}

.presentation-carousel {
    position: relative;
    width: 100%;
    height: 380px;
    overflow: hidden;
}

.carousel-container {
    width: 100%;
    height: 100%;
    position: relative;
}

.carousel-item {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0;
    transition: opacity 1.5s ease-in-out; /* Transition plus douce */
}

.carousel-item.active {
    opacity: 1;
}

/* Diplômes */
.diplomas-container {
    width: 100%;
    border-top: 1px solid rgba(0, 0, 0, 0.05); /* Ligne de séparation très discrète */
    padding-top: 4rem;
    margin-top: 2rem;
}

.diplomas-list {
    display: flex;
    justify-content: space-between;
    list-style: none;
    width: 100%;
    gap: 2rem;
}

.diploma-item {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.2rem;
    font-weight: 300;
    text-align: center;
    flex: 1;
    opacity: 0;
    transform: translateY(15px);
    transition: opacity 1s ease, transform 1s ease;
}

.diplomas-container.visible .diploma-item {
    opacity: 1;
    transform: translateY(0);
}

.diploma-item:nth-child(1) { transition-delay: 0.2s; }
.diploma-item:nth-child(2) { transition-delay: 0.4s; }
.diploma-item:nth-child(3) { transition-delay: 0.6s; }
.diploma-item:nth-child(4) { transition-delay: 0.8s; }

/* Section 3 : Prestations */
.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 4rem; /* Plus d'espace entre les cartes de prestations */
    width: 100%;
}

.service-card {
    padding: 2.5rem 2rem;
    border: 1px solid rgba(255, 255, 255, 0.05); /* Bordure presque invisible */
    transition: border-color 0.4s ease;
}

.service-card:hover {
    border-color: rgba(255, 255, 255, 0.3);
}

.service-card h3 {
    font-weight: 300;
    font-size: 1.1rem;
    letter-spacing: 0.15rem;
    margin-bottom: 1.5rem;
    text-transform: uppercase;
}

.service-card p {
    font-size: 0.9rem;
    font-weight: 100;
    opacity: 0.7;
    line-height: 1.8;
}

/* Sections de texte centré (Manière de travailler / Secteurs) */
.text-center-focus {
    max-width: 750px;
    text-align: center;
}

.lead-text {
    font-size: 1.1rem;
    font-weight: 100;
    letter-spacing: 0.06rem;
    line-height: 2.2;
}

/* Section 6 : Contact */
.contact-intro {
    font-size: 1rem;
    margin-bottom: 4rem;
    font-weight: 200;
    opacity: 0.8;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.contact-link a {
    color: var(--color-dominant);
    text-decoration: none;
    font-size: 1.5rem;
    font-weight: 100;
    letter-spacing: 0.15rem;
    transition: opacity 0.3s ease, letter-spacing 0.3s ease;
}

.contact-link a:hover {
    opacity: 0.5;
    letter-spacing: 0.18rem; /* Léger effet d'écartement au survol */
}

/* Responsive Design */
@media (max-width: 1024px) {
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 3rem;
    }
    .presentation-grid {
        gap: 3rem;
    }
}

@media (max-width: 768px) {
    .section {
        padding: 4rem 1.5rem;
    }
    
    .hero-overlay {
        padding: 3rem 1.5rem;
    }
    
    .hero-overlay h1 {
        font-size: 2rem;
        letter-spacing: 0.5rem;
    }

    .presentation-grid {
        grid-template-columns: 1fr;
        gap: 3rem;
    }

    .presentation-carousel {
        height: 280px;
    }

    .diplomas-list {
        flex-direction: column;
        gap: 1.5rem;
        align-items: center;
    }

    .services-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .animate-title {
        font-size: 1.6rem;
        letter-spacing: 0.4rem;
        margin-bottom: 3rem;
    }

    .contact-link a {
        font-size: 1.1rem;
    }
}