estilos.css

*
{
    
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    color: #333;
    text-align: center;
    font-family: Arial, Helvetica, sans-serif;
    font-size: 16px;
    
 
}
body
{
    background-color: rgb(255, 255, 255);
}
#ContainerHeader
{
    margin: 0 auto;
    position: relative;
    width: 70%;
    display: grid;
    border: 2px solid #333;
    height: 80px;
    place-content: center;
    background-color: rgb(20, 9, 82);
    box-shadow: 5px 7px 15px 1px  rgb(8, 250, 68);

}
#ContainerHeader div
{
  
    
    font-family: Arial, Helvetica, sans-serif;
    font-size: 40px;
    display: grid;
    place-content: center;
    color: white;
    font-weight: bold;
     

}
#ContainerHeader span
{
    color: white;
}
#container
{
    position: relative;
    width: 70% ;
    padding: 1rem;
    text-align: center;
    border: 2px solid #aaa;
    margin: 0 auto;
}
h1
{
    font-size: 30px;
}