:root {
    --color-primary-blue: #0d6efd;
    --color-dark-blue: #1c2b3a;
    --color-light: #ffffff;
    --color-background: #f4f7f6;
    --text-dark: #1c2b3a;
    --text-light: #f0f0f0;
    --font-primary: 'Poppins', sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { font-family: var(--font-primary); line-height: 1.7; background-color: var(--color-light); color: var(--text-dark); }
.container { width: 90%; max-width: 1200px; margin: 0 auto; }

/* --- Header & Navigation --- */
.main-header { background-color: var(--color-light); box-shadow: 0 2px 10px rgba(0,0,0,0.08); position: sticky; top: 0; z-index: 1000; height: 90px; }
.main-nav { display: flex; justify-content: space-between; align-items: center; height: 100%; }
.logo-image { height: 50px; width: auto; }
.nav-menu { list-style: none; display: flex; align-items: center; }
.nav-menu li { margin-left: 40px; }
.nav-menu a { text-decoration: none; color: var(--text-dark); font-weight: 600; padding-bottom: 5px; border-bottom: 2px solid transparent; transition: all 0.3s ease; }
.nav-menu a:hover, .nav-menu a.active { color: var(--color-primary-blue); border-bottom-color: var(--color-primary-blue); }
.cta-button { background-color: var(--color-primary-blue); color: var(--color-light); padding: 12px 28px; border-radius: 50px; text-decoration: none; font-weight: 700; transition: all 0.3s ease; display: inline-block; border: none; cursor: pointer; }
.cta-button:hover { transform: translateY(-3px); background-color: #0b5ed7; }
.nav-cta { padding: 10px 25px; }
.hamburger { display: none; cursor: pointer; background: none; border: none; }
.hamburger span { display: block; width: 28px; height: 3px; margin: 6px 0; background-color: var(--text-dark); border-radius: 3px; transition: all 0.3s ease-in-out; }

/* --- Hero Section --- */
.hero { background: linear-gradient(rgba(28, 43, 58, 0.85), rgba(28, 43, 58, 0.85)), url('hero-background.png') no-repeat center center/cover; color: var(--text-light); height: calc(90vh - 90px); display: flex; align-items: center; text-align: center; }
.hero-content { max-width: 850px; margin: 0 auto; }
.hero-content h1 { font-size: 3.8rem; font-weight: 700; margin-bottom: 10px; }
.hero-subtitle { font-size: 1.5rem; letter-spacing: 1px; margin-bottom: 20px; text-transform: uppercase; }
.hero-content p { font-size: 1.25rem; margin-bottom: 40px; color: rgba(255, 255, 255, 0.85); }

/* --- Sections --- */
.content-section { padding: 100px 0; }
.section-title { font-size: 2.8rem; font-weight: 700; text-align: center; margin-bottom: 20px; position: relative; }
.section-subtitle { text-align: center; max-width: 700px; margin: 0 auto 60px auto; font-size: 1.1rem; color: #666; }
.section-title::after { content: ''; display: block; width: 60px; height: 4px; background-color: var(--color-primary-blue); margin: 15px auto 0; border-radius: 2px; }
.dark-bg { background-color: var(--color-dark-blue); color: var(--text-light); }
.dark-bg .section-title, .dark-bg .section-subtitle { color: var(--text-light); }

/* --- About Section --- */
.about-container { display: grid; grid-template-columns: 2fr 1fr; gap: 60px; align-items: center; }
.values-box { background-color: var(--color-primary-blue); color: var(--color-light); padding: 30px; border-radius: 10px; }
.values-box h3 { font-size: 1.8rem; margin-bottom: 20px; }
.values-box ul { list-style: none; padding: 0; }
.values-box ul li { font-size: 1.1rem; margin-bottom: 10px; }

/* --- Services Section --- */
.services-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 30px; margin-top: 60px; }
.service-card { background-color: #2c3e50; padding: 30px; border-radius: 10px; transition: transform 0.3s ease; }
.service-card:hover { transform: translateY(-10px); }
.service-card h3 { font-size: 1.5rem; color: var(--color-primary-blue); margin-bottom: 15px; }

/* --- Portfolio Section --- */
.portfolio-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(350px, 1fr)); gap: 20px; }
.portfolio-item { position: relative; border-radius: 10px; overflow: hidden; cursor: pointer; box-shadow: 0 10px 20px rgba(0,0,0,0.1); }
.portfolio-item img { display: block; width: 100%; height: 300px; object-fit: cover; transition: transform 0.4s ease; }
.portfolio-item:hover img { transform: scale(1.1); }
.portfolio-overlay { position: absolute; top: 0; left: 0; width: 100%; height: 100%; background: linear-gradient(to top, rgba(13, 110, 253, 0.9), rgba(13, 110, 253, 0.5)); color: var(--color-light); display: flex; flex-direction: column; justify-content: flex-end; padding: 30px; opacity: 0; transition: opacity 0.4s ease; }
.portfolio-item:hover .portfolio-overlay { opacity: 1; }
.portfolio-overlay h3 { font-size: 1.5rem; margin-bottom: 5px; }

/* --- News Section --- */
.news-container { max-width: 900px; margin: auto; }
.news-article-card { background-color: #2c3e50; border-radius: 10px; box-shadow: 0 10px 30px rgba(0,0,0,0.08); overflow: hidden; display: flex; }
.news-image { width: 40%; object-fit: cover; }
.news-content { padding: 40px; width: 60%;}
.news-category { display: block; font-size: 0.8rem; font-weight: 600; color: #aaa; text-transform: uppercase; margin-bottom: 10px; }
.news-content h3 { font-size: 1.8rem; margin-bottom: 15px; color: var(--color-light); }
.read-more-link { display: inline-block; color: var(--color-light); font-weight: 700; text-decoration: none; margin-top: 20px; }
.read-more-link::after { content: ' →'; transition: transform 0.3s ease; display: inline-block; }
.read-more-link:hover { color: var(--color-primary-blue); }

/* --- Contact Section --- */
#contact { background-color: var(--color-background); }
.contact-grid { display: grid; grid-template-columns: 2fr 1fr; gap: 60px; align-items: flex-start; }
.contact-form input, .contact-form textarea { width: 100%; padding: 15px; margin-bottom: 20px; border-radius: 8px; border: 1px solid #ddd; background-color: var(--color-light); color: var(--text-dark); font-family: var(--font-primary); font-size: 1rem; }
.address-info h3 { font-size: 1.5rem; margin-bottom: 15px; }
.social-links-contact a { color: var(--text-dark); display: block; margin-bottom: 10px; }

/* --- Footer --- */
.main-footer { background-color: var(--color-dark-blue); color: #aaa; text-align: center; padding: 40px 0; }
.social-links { margin-bottom: 20px; display: flex; justify-content: center; gap: 20px; }
.social-links a { border: 2px solid #555; width: 45px; height: 45px; border-radius: 50%; display: flex; align-items: center; justify-content: center; text-decoration: none; transition: all 0.3s ease; }
.social-links a img { height: 40px; width: auto; }
.social-links a:hover { background-color: var(--color-primary-blue); border-color: var(--color-primary-blue); transform: translateY(-5px); }

/* --- Responsive Design --- */
@media (max-width: 992px) {
    /* CORRECTION CRUCIALE POUR LE MENU MOBILE */
    .nav-menu {
        display: none; flex-direction: column; position: absolute;
        top: 90px; left: 0; width: 100%; background-color: var(--color-light);
        box-shadow: 0 5px 10px rgba(0,0,0,0.1); padding: 20px 0;
    }
    .nav-menu.active { display: flex; }
    .nav-menu li { margin: 15px 0; text-align: center; }
    .hamburger { display: block; }
    
    .about-container, .contact-grid { grid-template-columns: 1fr; }
    .news-article-card { flex-direction: column; }
    .news-image, .news-content { width: 100%; }
}
@media (max-width: 768px) {
    .hero { height: auto; padding: 80px 0; }
    .hero-content h1 { font-size: 2.5rem; }
    .section-title { font-size: 2.2rem; }
}