/* style.css */
body {
    background-color: #f0f0f0;
    font-family: Arial, sans-serif;
    color: #333;
    margin: 0;
    padding: 20px;
}

h1 {
    color: #007bff;
    text-align: center;
}

.przycisk {
    background: #007bff;
    color: white;
    padding: 15px 30px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
}

.przycisk:hover {
    background: #0056b3;
}
<img src="obrazek.jpg" alt="Responsywny obrazek" style="max-width: 100%; height: auto;">