/* Reset et styles de base */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Verdana', sans-serif;
        }

        body {
            line-height: 1.6;
            color: #333;
            background-color: #f9f9f9;
        }

        header {
            background-color: #2c3e50;
            color: white;
            padding: 1rem;
            text-align: center;
            display: flex;
            flex-direction: column;
            align-items: center;
        }

        .logo {
            max-width: 150px;
            margin-bottom: 1rem;
        }

        nav {
            display: flex;
            justify-content: center;
            background-color: #34495e;
            padding: 0.5rem;
            flex-wrap: wrap;
        }

        nav a {
            color: white;
            text-decoration: none;
            padding: 0.5rem 1rem;
            margin: 0 0.5rem;
            border-radius: 4px;
        }

        nav a:hover {
            background-color: #2c3e50;
        }

        main {
            max-width: 1200px;
            margin: 2rem auto;
            padding: 0 1rem;
        }

        section {
            margin-bottom: 2rem;
            padding: 1rem;
            background-color: white;
            border-radius: 8px;
            box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
        }

        h1, h2 {
            color: #2c3e50;
        }

        footer {
            text-align: center;
            padding: 1rem;
            background-color: #2c3e50;
            color: white;
            margin-top: 2rem;
        }

        .btn {
            display: inline-block;
            background-color: #3498db;
            color: white;
            padding: 0.5rem 1rem;
            border-radius: 4px;
            text-decoration: none;
            margin-top: 0.5rem;
        }

        .btn:hover {
            background-color: #2980b9;
        }

        .portfolio-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            gap: 1rem;
        }

        .portfolio-item {
            border: 1px solid #ddd;
            border-radius: 8px;
            padding: 1rem;
            background-color: #f0f8ff;
        }

        .portfolio-item img {
            max-width: 100%;
            border-radius: 4px;
        }

        .form-group {
            margin-bottom: 1rem;
        }

        .form-group label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: bold;
        }

        .form-group input,
        .form-group textarea {
            width: 100%;
            padding: 0.5rem;
            border: 1px solid #ddd;
            border-radius: 4px;
        }

        .form-group textarea {
            height: 150px;
        }

        .form-submit {
            background-color: #3498db;
            color: white;
            padding: 0.75rem 1.5rem;
            border: none;
            border-radius: 4px;
            cursor: pointer;
        }

        .form-submit:hover {
            background-color: #2980b9;
        }