body {
    font-family: sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f0f0f0;
}

.billboard-container { /* New container */
    width: 100%;
    max-width: 970px;
    margin: 20px auto; /* Centers the billboard */
}

.billboard {
    width: 100%;
    height: 0; /* Key for aspect ratio */
    padding-bottom: 25.773%; /* (250/970) * 100%; Maintains aspect ratio */
    background-color: #ffffff;
    border: 1px solid #ccc;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    box-sizing: border-box;
    overflow: hidden;
}

/* ... (rest of the CSS - headline, body-text, cta-button, small-print, media queries, etc. - remains the same) */