style.css

body{
   box-sizing: border-box;   
   background-color: black;
   
}
h1{
    color: white;
    font-size: 75px;
}
button{
    border: none;
    
    padding-top: 10px;
    padding-bottom: 10px;
    color: white;
    font-weight: bold;
    width: 100%;
    margin-top: 10px;
    margin-bottom: 5px;
    background-color: red;
    box-shadow: 0 1px 3px 5px blue;
}
#increment-btn{
    background: darkred;
  
}
#save-btn{
    background:darkred ;
}
header{
    width: 100%;
    height: 150px;
    box-sizing: border-box;
    display: flex;
    align-items: center;
    justify-content: center;
    border:2px solid black ;
    box-shadow: 0 1px 3px 5px blue;
}
p{
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 30px;
    color: white;
    border: 2px solid black;
    box-shadow: 0 1px 3px 5px  blue;
    font-size: x-large;
}
.name{
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 100px;
    margin-top: 20px;
    margin-bottom: 10px;
    color: white;
    box-shadow: 0 1px 3px 5px  white;
    font-size: 90px;

}