```css
nav { 
    position: sticky; top: 0; 
    width: 100%; 
    background: black; 
    padding: 15px 0; 
    text-align: center; 
    z-index: 100; 
}

.image-section {
    position: relative;
}

img {
    position: static;
    width: 100%;
    height: 1000px;
    object-fit: cover;
}

h1 {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: white;
}

#about {
    padding: 40px;
}

footer {
    position: relative;
    left: 0;
    padding: 20px;
}

.top {
    position: fixed;
    right: 10px;
    bottom: 10px;
}
```