body {
    background-color: lightblue;           
}

h1, h2 {
    color: green;                          
}

h3 {
    color: white;                         
}


p a {
    font-size: 20px;
    color: magenta;
}
.caja-flotante {
    height: 120px;
    width: 300px;
    background-color: orange;             
    margin: 20px 10px;                     
    padding: 30px;                         
    text-align: center;
    border: 10px solid blue;              
    float: left;
    }
.cabeza {
    background-color: gray;               
    text-align: center;
}
.caja4 {
    background-color: lightskyblue;   
    height: 300px;
    float: right;                         
    line-height: 300px;                 
    text-align: center;
}
.caja5 {
    background-color: peru;               
    height: 300px;
    float: right;                          
}