h1{
    color: #f7f1f1;
    text-align: center;
}

body nav {
    align-items: center;
    display: flex;
    min-height: 5vh; 
    justify-content: center; 
}
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: sans-serif;
    }
body{
    background: #343534;
}
nav a {
    position: relative;
    font-size: 1.5em;
    font-weight: 500;
    color: #f7f1f1;
    text-decoration: none;
    padding: 4px 20px;
    transition: 0.5s;
}

nav a:hover {
    color: #8ef;
}

nav a span {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    border-bottom: 2px solid #bef;
    border-radius: 15px;
    transform: scale(0) translate Y(50px); 
    opacity: 0;
    transition: 0.5s;
}

nav a:hover span {
    transform: scale(1) translate Y(0); 
    opacity: 1;
}

ul{
    margin:auto; 
    text-align: center;
    
}
ul li a {
    color: #f7f1f1; 
    text-decoration: none; 
  }
  
ul li a:hover {
    color: #54bbee; 
}