style4.css

* {
    padding: 0;
    margin: 0;
}

body {
    background-color: cadetblue;    
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}

nav {
    background-color: black;
    display: flex;
    flex-direction: row;        
    justify-content: flex-start;
    align-items: center;
    column-gap: 10px;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100px;
    z-index: 1;
}

a {
    color: white;
    text-decoration: none;
}

.element {
    background-color: #123456;
    width: 100px;
    height: 100px;
    position: relative;
}

.notification-count {
    background-color: #4c046b;
    color: white;
    font-size: 20px;
    font-weight: bold;
    border-radius: 50%;    
    padding: 5px;
    position: absolute;
    top: -8px;
    right: -5px;
}

footer {
    background-color: black;  
    display: flex;
    flex-direction: row;        
    justify-content: flex-start;
    align-items: center;          
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 100px;
    z-index: 1;
    color: white;
}