* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: Cambria, Cochin, Georgia, Times, 'Times New Roman', serif;
    background-color: whitesmoke;
}

header {
    background-color: #FF005A;
    width: 100%;
    height: 140px;
    padding: 20px;    
}
#logo {
    background-color: white;
    width: 100px;
    height: 100px;
    float: left;
    border-radius: 50%; 
    box-shadow: 1px 1px 3px silver;
    padding: 10px;
}
#logo img {
    width: 100%;
    height: 100%;
}
header nav {
    float: right;
    /* margin-top: 25px; */
}
header nav a {
    float: left;
    color:white;
    text-align: center;
    padding: 12px;
    text-decoration: none; 
    font-size: 18px;
    line-height: 25px;
    border-radius: 8px;
}
header nav a.active {
    background-color: blue;
    color: white;    
}
header nav a:hover:not(.active) {
    background-color: #ddd; 
    color: black;   
}

/* secciones */
section {
    /* border: 1px solid red; */
    width: 100%;
    text-align: center;
    margin: 50px 0;
    padding: 0 50px;
    align-items: center; /* centrado vertical */
    display: flex;
}

footer {
    background-color: rgb(50, 50, 50); 
    width: 100%;   
    text-align: center; 
    font-size: 3vw;
}
footer > div {
    display: flex;
    padding: 25px;    
}
footer > div div {
    width: 50%;    
}
footer a {
    text-decoration: none;
    color: white;
}
footer div p {
    color: white;
}
footer nav {
    margin-bottom: 15px;
}
footer nav a {
    padding: 5px;
    border-radius: 5px;   
}
footer nav a:hover {
    background-color: gray;
}
/* copyright */
footer > p {
    color: gray;
    font-size: 2.5vw;
}

/* limitar max tamaño de texto */
@media screen and (min-width: 800px) {
    footer {
        font-size: 24px;
    }
    footer > p {
        font-size: 20px;
    }    
}

@media screen and (max-width: 500px) {
    header {
        height: 125px;
        padding: 10px;
    }
    header nav a {
        float: none;
        display: block; /*cada link en una fila*/
        text-align: left;        
    }      
    header nav a {
        line-height: 10px;
    }

    section {
        margin: 25px 0;
        padding: 0 25px;  
    }
    
    
    footer > div {
        display: block;
        padding: 0;
    }
    footer nav {
        margin: 0;
        padding: 10px;
    }
    footer > div div {
        width: auto;    
    }
}