*{
    padding: 0;
    margin: 0;
    box-sizing: border-box;
    font-family: Arial, Helvetica, sans-serif;
}

header{
    background-color: aqua;
    display: flex;
    height: 100px;
    align-items: center;
    padding: 0px 20px;
}

header nav{
    flex: 2;
}

header nav a{
    text-decoration: none;
    text-transform: uppercase;
    color: green;
    font-weight: bold;
    font-size: 18px;
} 

header nav a:hover{
    color: blue;
}
header h1{
    flex: 1;
}

header ul{
    display: flex;
    justify-content: space-between;
}

 header li{
    list-style-type: none;
 }

main{
    background-color: beige;
    padding: 50px 20px;
    min-height: calc(100vh - 100px - 50px);
}


main p{
    margin: 20px 0;
    font-size: 18px;
    color: rgb(51, 49, 49);
}
/* # = ID */
p#red{
    color: red;
}
/* . = class */
p.green{
    color: green;
}

/* main img{
    width: 50%;
    display: block;
    margin: 0 auto;
} */

main figure{
    width: 100%;
    display: flex;
    justify-content: center;
}

main figure div{
    width: 50%;
}

main figure img{
    width: 100%;
}

footer{
    background-color: blue;
    position: fixed;
    bottom: 0px;
    right: 0px;
    left: 0px;
    color: white;
    height: 50px;
}

footer p{
    text-align: center;
    line-height: 50px;
}