/* --- Variables & Reset --- */
:root {
    --primary-color: #005AEE;
    --primary-darker: #0041AD;
    --light-bg: #FFFFFF;
    --accent-bg: #F8F9FA;
    --dark-text: #212529;
    --grey-text: #6C757D;
    --border-color: #DEE2E6;
    --card-shadow: 0 4px 15px rgba(0, 0, 0, 0.07);
    --font-family: 'Poppins', sans-serif;
}

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

body {
    font-family: var(--font-family);
    background-color: var(--light-bg);
    color: var(--dark-text);
    line-height: 1.7;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 20px;
}

/* --- Header & Navigation --- */
.main-header {
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    padding: 15px 0;
    position: sticky;
    top: 0;
    z-index: 1000;
}

.main-header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-weight: 700;
    font-size: 1.5em;
    color: var(--dark-text);
    text-decoration: none;
}

.main-nav ul {
    list-style: none;
    display: flex;
    gap: 25px;
}

.main-nav a {
    color: var(--grey-text);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
}

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

.mobile-nav-toggle { display: none; }

/* --- Buttons --- */
.cta-button, .cta-button-secondary {
    display: inline-block;
    padding: 12px 25px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: transform 0.3s ease, background-color 0.3s ease;
}

.cta-button {
    background-color: var(--primary-color);
    color: white;
}

.cta-button-secondary {
    background-color: transparent;
    color: var(--dark-text);
    border: 1px solid var(--border-color);
}

.cta-button:hover {
    transform: translateY(-3px);
    background-color: var(--primary-darker);
}
.cta-button-secondary:hover {
    transform: translateY(-3px);
    background-color: var(--accent-bg);
    border-color: var(--grey-text);
}


/* --- Sections --- */
.hero-section {
    /* Cette technique superpose un dégradé semi-transparent sur une image de fond */
background: 
        linear-gradient(rgba(10, 20, 40, 0.75), rgba(10, 20, 40, 0.75)),
        url('hero-background-strategie-ia.jpg');
     background-size: cover;
    /* On ajuste la position verticale de l'image. 'center' pour l'horizontal, '30%' pour le vertical. */
    background-position: center 60%;
    /* On fixe l'image pour l'effet de parallaxe */

    background-attachment: fixed; 
    color: white;
    padding: 100px 0;
    text-align: center;
}

.hero-section h1 {
    font-size: 3em;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 20px;
}

.hero-section .subtitle {
    font-size: 1.2em;
    max-width: 700px;
    margin: 0 auto 30px;
    color: rgba(255, 255, 255, 0.9);
}

.content-section {
    padding: 80px 0;
}
.content-section-accent {
    padding: 80px 0;
    background-color: var(--accent-bg);
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.section-title {
    text-align: center;
    font-size: 2.5em;
    font-weight: 600;
    margin-bottom: 15px;
    color: var(--dark-text);
}
.section-intro {
    text-align: center;
    max-width: 600px;
    margin: 0 auto 50px;
    color: var(--grey-text);
}


/* --- Services Grid --- */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}
.service-card {
    background-color: var(--light-bg);
    padding: 40px; /* Augmenté de 30px à 40px pour donner plus d'air au contenu */
    border-radius: 12px;
    border: 1px solid var(--border-color);
    text-align: center;
    box-shadow: var(--card-shadow);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.service-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}
.service-icon {
    height: 100px; /* Augmenté significativement pour un rendu plus visuel */
    margin-bottom: 30px; /* J'ajuste aussi la marge pour garder l'équilibre */
}
}
.service-card h3 {
    font-size: 1.4em;
    margin-bottom: 15px;
}

/* --- Section À Propos --- */
.about-content {
    display: flex;
    align-items: center;
    gap: 50px;
    max-width: 900px;
    margin: 40px auto 0;
    text-align: left;
}

.profile-picture {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    object-fit: cover;
    border: 5px solid var(--light-bg);
    box-shadow: var(--card-shadow);
    flex-shrink: 0;
}

.about-text p {
    margin-bottom: 20px;
}

.about-text .cta-button-secondary {
    margin-top: 10px;
}


/* --- Case Studies --- */
.case-study-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
}
.case-study-card {
    background-color: var(--light-bg);
    padding: 30px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
}
.case-study-card h3 {
    font-size: 1.4em;
    margin-bottom: 15px;
    color: var(--primary-color);
}
.case-study-card p {
    margin-bottom: 10px;
}
.case-study-card .highlight {
    font-weight: 700;
    color: #00A86B; 
}

/* --- Contact Form --- */
.contact-form {
    max-width: 700px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 20px;
}
.contact-form .form-group {
    display: flex;
    gap: 20px;
}
.contact-form input, .contact-form textarea {
    width: 100%;
    padding: 15px;
    background-color: var(--light-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--dark-text);
    font-family: var(--font-family);
    font-size: 1em;
    transition: border-color 0.3s ease;
}
.contact-form input:focus, .contact-form textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}
.contact-form input::placeholder, .contact-form textarea::placeholder {
    color: var(--grey-text);
}
.contact-form textarea {
    min-height: 150px;
    resize: vertical;
}
.contact-form button {
    align-self: center;
}

/* --- Footer --- */
.main-footer {
    text-align: center;
    padding: 40px 0;
    background-color: var(--accent-bg);
    border-top: 1px solid var(--border-color);
    color: var(--grey-text);
}

/* --- Responsive --- */
@media (max-width: 768px) {
    .hero-section h1 { font-size: 2.2em; }
    
    .mobile-nav-toggle {
        display: block;
        background: none;
        border: 1px solid var(--border-color);
        color: var(--grey-text);
        padding: 8px 12px;
        border-radius: 5px;
        cursor: pointer;
    }
    .main-nav { 
        display: none;
    }
    .main-nav.active {
        display: block;
        position: absolute;
        top: 70px;
        left: 0;
        right: 0;
        background-color: var(--light-bg);
        padding: 20px;
        border-bottom: 1px solid var(--border-color);
        box-shadow: 0 4px 10px rgba(0,0,0,0.05);
    }
    .main-nav.active ul {
        flex-direction: column;
        align-items: center;
    }

    .about-content {
        flex-direction: column;
        text-align: center;
        gap: 30px;
    }
    .profile-picture {
        width: 120px;
        height: 120px;
    }

    .case-study-grid {
        grid-template-columns: 1fr;
    }
    .contact-form .form-group {
        flex-direction: column;
    }
    
    /* On désactive l'effet parallax sur mobile pour la performance */
    .hero-section {
        background-attachment: scroll;
    }
}

/* ======================= STYLES DE LA POPUP ======================= */
.popup-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(13, 17, 23, 0.8);
    backdrop-filter: blur(5px);
    z-index: 2000;
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.4s ease, visibility 0.4s ease;
}

.popup-overlay.active {
    opacity: 1;
    visibility: visible;
}

.popup-content {
    position: relative;
    background: var(--light-bg);
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
    max-width: 700px;
    width: 90%;
    display: flex;
    align-items: center;
    gap: 30px;
    transform: scale(0.9);
    transition: transform 0.4s ease;
}

.popup-overlay.active .popup-content {
    transform: scale(1);
}

.popup-image {
    max-width: 200px;
    border-radius: 8px;
}

.popup-text h2 {
    font-size: 1.8em;
    font-weight: 600;
    color: var(--dark-text);
    margin-bottom: 10px;
}

.popup-text p {
    color: var(--grey-text);
    margin-bottom: 20px;
}

.popup-form {
    display: flex;
    gap: 10px;
    margin-bottom: 10px;
}

.popup-form input {
    flex-grow: 1;
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 1em;
}

.close-popup {
    position: absolute;
    top: 10px;
    right: 15px;
    background: none;
    border: none;
    font-size: 2.5em;
    color: var(--grey-text);
    cursor: pointer;
    line-height: 1;
    transition: color 0.3s ease;
}

.close-popup:hover {
    color: var(--dark-text);
}

/* Responsive pour la popup sur mobile */
@media (max-width: 600px) {
    .popup-content {
        flex-direction: column;
        text-align: center;
        padding: 40px 20px 20px 20px;
    }
    .popup-image {
        max-width: 150px;
    }
    .popup-form {
        flex-direction: column;
    }
}

/* Style pour le texte mis en évidence dans la popup */
.popup-highlight {
    color: var(--primary-color);
    font-weight: 600;
}