/* 1. VARIABLES - Pour changer les couleurs facilement */
:root {
    --primary: #2563eb;       /* Bleu principal */
    --primary-dark: #1e40af;  /* Bleu foncé au survol */
    --secondary: #2fa36b;     /* Vert (pour le dégradé et les accents) */
    --text: #1f2937;          /* Couleur du texte foncé */
    --light-bg: #f8fafc;      /* Fond gris très clair */
    --white: #ffffff;
    --gray-icon: #9ca3af;     /* Couleur des icônes */
    --border-color: #e5e7eb;  /* Couleur des bordures fines */
}

/* 2. RESET - On remet tout à plat */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth; /* Pour que le clic dans le menu glisse doucement */
}

body {
    font-family: 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    color: var(--text);
    background: var(--white);
    line-height: 1.6;
}

/* 3. HEADER & NAVIGATION */
.header {
    position: sticky;
    top: 0;
    background: var(--white);
    box-shadow: 0 2px 15px rgba(0,0,0,0.05);
    z-index: 1000;
    padding: 10px 0;
}

.container {
    max-width: 1100px;
    margin: auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    font-weight: 700;
    font-size: 22px;
    color: var(--primary);
}

/* --- MODIFICATION LOGO ICI --- */
.logo-ei-sap {
    height: 75px;  /* J'ai agrandi le logo ici (avant c'était 45px) */
    width: auto;
}
/* ----------------------------- */

.menu {
    display: flex;
    list-style: none;
    gap: 30px;
    margin: 0;
}

.menu a {
    text-decoration: none;
    color: var(--text);
    font-weight: 600;
    font-size: 16px;
    transition: color 0.3s ease;
}

.menu a:hover {
    color: var(--primary);
}

/* 4. HERO SECTION (Bandeau du haut) */
.hero {
    min-height: 75vh;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    display: flex;
    align-items: center;
    color: var(--white);
    text-align: center;
    padding: 0 20px;
}

.hero-content {
    max-width: 800px;
    margin: auto;
    padding: 40px 0;
}

.hero h2 {
    font-size: clamp(2rem, 5vw, 3rem);
    margin-bottom: 20px;
    line-height: 1.2;
    font-weight: 800;
}

.hero p {
    font-size: 1.2rem;
    margin-bottom: 35px;
    opacity: 0.95;
}

.btn {
    display: inline-block;
    background: var(--white);
    color: var(--primary);
    padding: 15px 35px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 700;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
}

.btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.2);
    background-color: #f0f0f0;
}

/* 5. SECTIONS GÉNÉRALES */
.section {
    padding: 100px 20px;
}

.section h2 {
    text-align: center;
    font-size: 2.2rem;
    margin-bottom: 50px;
    color: var(--text);
    position: relative;
}

/* Petit trait sous les titres */
.section h2::after {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background: var(--secondary);
    margin: 15px auto 0;
    border-radius: 2px;
}

.gray {
    background: var(--light-bg);
}

.text-center {
    text-align: center;
    max-width: 800px;
    margin: auto;
    font-size: 1.1rem;
    color: #4b5563;
}

/* 6. GRILLES (SERVICES ET VALEURS) */
.cards, .values {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    max-width: 1100px;
    margin: auto;
}

.card {
    background: var(--white);
    padding: 40px 30px;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.05);
    text-align: center;
    transition: all 0.3s ease;
    border: 1px solid transparent;
}

.card:hover {
    transform: translateY(-10px);
    border-color: var(--border-color);
    box-shadow: 0 15px 40px rgba(0,0,0,0.1);
}

.card h3 {
    color: var(--primary);
    margin-bottom: 15px;
    font-size: 1.3rem;
}

.card p {
    color: #6b7280;
}

.values div {
    text-align: center;
    padding: 20px;
}

.values h3 {
    margin: 15px 0 10px;
    font-size: 1.2rem;
}

/* 7. SECTION CONTACT (Layout) */
.contact-layout {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 60px;
    max-width: 1100px;
    margin: auto;
    align-items: start;
}

.contact-text h2 {
    text-align: left;
    margin-bottom: 20px;
}

.contact-text h2::after {
    margin: 15px 0 0;
}

/* FORMULAIRE */
.contact-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
    background: var(--white);
    padding: 30px;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.03);
}

.contact-form input,
.contact-form textarea {
    padding: 15px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    font-size: 16px;
    width: 100%;
    font-family: inherit;
    transition: border-color 0.3s;
}

.contact-form input:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: var(--primary);
}

.contact-form textarea {
    resize: vertical;
    min-height: 120px;
}

.contact-form button {
    background: var(--primary);
    color: var(--white);
    border: none;
    padding: 15px;
    border-radius: 50px;
    font-weight: 700;
    font-size: 16px;
    cursor: pointer;
    transition: all 0.3s ease;
    align-self: flex-start;
    padding-left: 40px;
    padding-right: 40px;
}

.contact-form button:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(37, 99, 235, 0.3);
}

/* --- BANDEAU DE CONTACT --- */
.contact-info-banner {
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: var(--white);
    padding: 30px;
    border-radius: 15px;
    box-shadow: 0 5px 25px rgba(0,0,0,0.06); /* Ombre douce et large */
    margin-top: 60px;
    width: 100%;
    max-width: 1100px;
    margin-left: auto;
    margin-right: auto;
    border: 1px solid #f0f0f0;
}

.contact-info-item {
    display: flex;
    align-items: center;
    font-size: 1.15rem;
    color: var(--text);
}

.contact-info-item i {
    margin-right: 15px;
    color: var(--gray-icon);
    font-size: 1.4rem;
}

.contact-info-item span {
    font-weight: 700;
}

.contact-info-separator {
    height: 50px;
    width: 2px;
    background-color: var(--border-color);
    margin: 0 50px;
}

/* 8. FOOTER */
.footer {
    background: #111827;
    color: #9ca3af;
    text-align: center;
    padding: 40px 20px;
    font-size: 0.9rem;
}

/* 9. ANIMATIONS */
.fade-up {
    opacity: 0;
    transform: translateY(30px);
    animation: fadeUp 0.8s forwards ease-out;
}

.delay-1 { animation-delay: 0.2s; }
.delay-2 { animation-delay: 0.4s; }

@keyframes fadeUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 10. RESPONSIVE */
@media (max-width: 900px) {
    .contact-layout {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .contact-text h2 {
        text-align: center;
    }
    
    .contact-text h2::after {
        margin: 15px auto 0;
    }

    .contact-text p {
        text-align: center;
    }

    .contact-form button {
        align-self: center;
        width: 100%;
    }
}

@media (max-width: 768px) {
    .header .container {
        flex-direction: column;
        gap: 15px;
    }
    
    .menu {
        gap: 20px;
        flex-wrap: wrap;
        justify-content: center;
    }

    .section {
        padding: 60px 20px;
    }

    .hero {
        min-height: 60vh;
    }

    /* Adaptation du bandeau sur mobile */
    .contact-info-banner {
        flex-direction: column;
        padding: 25px;
        gap: 25px;
        align-items: flex-start;
    }

    .contact-info-separator {
        display: none;
    }
    
    .contact-info-item {
        width: 100%;
        font-size: 1rem;
    }
}

section {
    scroll-margin-top: 80px;
}