*{margin: 0; padding: 0; border: 0; box-sizing: border-box; font-family:Helvetica; }
body{background-image: url("../imagenes/background.jpg");}
img{max-width: 100%;}
#imagenperfil{width:10%;background-color: red; border-radius: 50%;overflow: hidden;}
header {display: flex; background-color: rgb(194, 44, 20);}  
.menu a{ color: rgb(236, 163, 110);text-decoration: none;}
ul{list-style: none;color:#3a1610;text-decoration: none;}
.contenedora_centro{margin: auto;width: 65% ; padding: 2em;background-color: rgb(255, 255, 255);}
.contenedora_centro2{margin: auto;width: 65% ; padding: 2em;background-color: #CEC18C;}
header{color: whitesmoke;}
.menuprin{width: 200%;padding: 1em;box-sizing: 1em;padding-left: 10px;
    display: flex;justify-content: space-around;}
h3{text-decoration: none;}