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

        body {
            font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
            background-color: #F8F9FA;
            color: #1A1A1A;
            line-height: 1.6;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

        /* Header Styles */
        header {
            background-color: #FFFFFF;
            padding: 2rem 0;
            box-shadow: 0 2px 4px rgba(0, 0, 0, 0.04);
        }

        .header-content {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 2rem;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .logo-container {
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .logo {
            max-height: 70px;
            width: auto;
            transition: transform 0.3s ease;
        }

        .logo:hover {
            transform: scale(1.05);
        }

        /* Main Content */
        main {
            flex: 1;
            max-width: 1200px;
            margin: 0 auto;
            padding: 4rem 2rem;
            width: 100%;
        }

        /* Hero Section */
        .hero {
            text-align: center;
            margin-bottom: 4rem;
        }

        .hero h1 {
            font-size: 2.8rem;
            font-weight: 700;
            color: #1A1A1A;
            margin-bottom: 0.5rem;
            letter-spacing: -0.5px;
        }

        .hero .subtitle {
            font-size: 1.2rem;
            color: #6B7280;
            font-weight: 400;
        }

        .hero .course-info {
            margin-top: 1.5rem;
            padding: 1rem 2rem;
            background-color: #FFFFFF;
            display: inline-block;
            border-radius: 8px;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
        }

        .hero .course-info span {
            font-size: 1rem;
            color: #4A5568;
            font-weight: 500;
        }

        /* Chapters Grid */
        .chapters-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 2.5rem;
        }

        /* Chapter Card */
        .chapter-card {
            background-color: #FFFFFF;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
            transition: all 0.3s ease;
            cursor: pointer;
            text-decoration: none;
            color: inherit;
            display: block;
        }

        .chapter-card:hover {
            transform: translateY(-8px);
            box-shadow: 0 20px 25px rgba(0, 0, 0, 0.1);
        }

        .chapter-image {
            width: 100%;
            height: 200px;
            object-fit: cover;
            transition: transform 0.4s ease;
        }

        .chapter-card:hover .chapter-image {
            transform: scale(1.05);
        }

        .image-container {
            overflow: hidden;
            position: relative;
        }

        .chapter-content {
            padding: 1.5rem;
        }

        .chapter-number {
            display: inline-block;
            padding: 0.35rem 0.8rem;
            background-color: #1A1A1A;
            color: #FFFFFF;
            font-size: 0.75rem;
            font-weight: 600;
            border-radius: 4px;
            margin-bottom: 1rem;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }

        .chapter-card h2 {
            font-size: 1.4rem;
            font-weight: 600;
            color: #1A1A1A;
            margin-bottom: 1rem;
            line-height: 1.3;
        }

        .chapter-summary {
            font-size: 0.95rem;
            color: #4A5568;
            line-height: 1.7;
        }

        .chapter-cta {
            margin-top: 1.5rem;
            display: inline-flex;
            align-items: center;
            font-size: 0.9rem;
            font-weight: 500;
            color: #1A1A1A;
            transition: color 0.2s ease;
        }

        .chapter-cta::after {
            content: '→';
            margin-left: 0.5rem;
            transition: transform 0.2s ease;
        }

        .chapter-card:hover .chapter-cta::after {
            transform: translateX(4px);
        }

        /* Footer commun (/place/footer.php) */
        .footer {
            background: #0f172a;
            color: #e5e7eb;
            padding: 3rem 2rem 1.5rem;
            margin-top: auto;
        }

        .footer .container {
            max-width: 1400px;
            margin: 0 auto;
            width: 100%;
        }

        .footer-content {
            display: grid;
            grid-template-columns: minmax(240px, 1.25fr) repeat(4, minmax(140px, 1fr));
            gap: 2rem;
            align-items: start;
        }

        .footer-section h4 {
            color: #fff;
            font-size: 0.95rem;
            text-transform: uppercase;
            letter-spacing: 0.08em;
            margin-bottom: 1rem;
        }

        .footer-logo {
            display: flex;
            align-items: center;
            gap: 0.85rem;
            margin-bottom: 1rem;
        }

        .footer-text h3 {
            color: #fff;
            font-size: 1.05rem;
            margin-bottom: 0.15rem;
        }

        .footer-text p,
        .footer-description,
        .footer-contact p,
        .footer-bottom p,
        .footer-certifications {
            color: #cbd5e1;
            font-size: 0.92rem;
            line-height: 1.6;
        }

        .footer-links {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 0.55rem;
        }

        .footer a {
            color: #e5e7eb;
            text-decoration: none;
            transition: color 0.2s ease, opacity 0.2s ease;
        }

        .footer a:hover {
            color: #93c5fd;
        }

        .footer-contact a {
            word-break: break-word;
        }

        .social-links {
            margin-top: 1rem;
            color: #cbd5e1;
        }

        .social-icons {
            display: flex;
            gap: 0.75rem;
            margin-top: 0.5rem;
        }

        .social-icons a {
            width: 34px;
            height: 34px;
            border: 1px solid rgba(255, 255, 255, 0.18);
            border-radius: 999px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.12);
            margin-top: 2rem;
            padding-top: 1.25rem;
        }

        .footer-bottom-content {
            display: flex;
            justify-content: space-between;
            gap: 1rem;
            align-items: center;
            flex-wrap: wrap;
        }
        
        /* Responsive Design */
        @media (max-width: 900px) {
            .chapters-grid {
                grid-template-columns: 1fr;
                gap: 2rem;
            }

            .hero h1 {
                font-size: 2.2rem;
            }

            .hero .subtitle {
                font-size: 1.1rem;
            }
        }
		@media (max-width: 768px) {

            .footer-content {
                grid-template-columns: 1fr;
            }

            .footer-bottom-content {
                align-items: flex-start;
                flex-direction: column;
            }
        }
        @media (max-width: 600px) {
            header {
                padding: 1.5rem 0;
            }

            .logo {
                max-height: 55px;
            }

            main {
                padding: 2.5rem 1.5rem;
            }

            .hero {
                margin-bottom: 2.5rem;
            }

            .hero h1 {
                font-size: 1.8rem;
            }

            .chapter-image {
                height: 180px;
            }

            .chapter-content {
                padding: 1.25rem;
            }

            .chapter-card h2 {
                font-size: 1.2rem;
            }
        }