body {
    background-color: #4e0073;
    margin: 0px;
}
header h1 {/*Titulo: Perimetros y Areas*/
    color: aliceblue;
    font-family: Verdana, Geneva, Tahoma, sans-serif;
    text-align: center;    
}
header p {/*Sub titulo: Elige el poligono que deseas*/
    color: aliceblue;
    font-family: Verdana, Geneva, Tahoma, sans-serif;
    text-align: center;
    font-size: 18px;
    padding-bottom: 10px;
}
.containers {/*contenedor principal: contiene los tres espacios individuales de cada poligono y sus formulas*/
    /*background-color: red;*/
    width: auto;
    height: auto;    
    display: flex;
    align-items: center;
    /*margin-left: 40px;*/
    flex-wrap: wrap;
    justify-content: center;    
}
.container {/*contiene: un poligono y sus formulas*/
    /*background-color:aqua;*/
    border: 2px solid #57067c;
    background-color: #57067c;
    border-radius: 10px;
    width: 300px;
    min-width: 200px;
    height: 170px;/*auto*/
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;   
    margin: 5px 25px 5px 25px;
}
.container:hover{
       
    transform: scale(1.1);
    background-color: #460963;
    box-shadow: 4px 4px 3px rgb(147, 168, 161);
}

.botton_volver {
    /*border: solid 2px yellow;*/
    width: auto;
    margin-top: 100px;
    height: auto;
    display: flex;
    align-items: center;
    justify-content: center;
    /*transform: rotate(45deg);*/
}
.circulo {
    width: 90px;
    height: 70px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background-color: #320346;
    box-shadow: 0px 0px 10px rgb(147, 168, 161);
}
/*.circulo :hover {
    box-shadow: 0px 0px 10px rgb(147, 168, 161);
}*/
.circulo_centro {
    width: 75px;
    height: 55px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background-color: #320346;
}
.circulo_arriba {
    width: 65px;
    height: 45px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background-color: #320346;
}
.text {
    width: 40px;
    height: 30px;
    border-radius: 50%;
    margin-bottom: 5px;
}
.text img {
    width: 40px;
    height: 30px;    
}
.text img:hover {
    transform: scale(1.2);
}
.circulo :hover {
    background-color: #57067c;
}
.circulo_centro :hover{
    background-color: #57067c;
}
.circulo_arriba :hover {
    background-color: #57067c;
}

.text p{    
    margin-top: 5px; /*para el texto nombre del poligono*/    
    margin-bottom: 5px;
}
.text p{
    text-decoration: none;
    font-family: 'Lucida Sans', 'Lucida Sans Regular', 'Lucida Grande', 'Lucida Sans Unicode', Geneva, Verdana, sans-serif;
    font-size: 20px;
    font-weight: 500;
    color: azure;
    
}
.container a{
    text-decoration: none;
    
}
.container h2{
    font-family: 'Lucida Sans', 'Lucida Sans Regular', 'Lucida Grande', 'Lucida Sans Unicode', Geneva, Verdana, sans-serif;
    color: rgb(224, 190, 147);
}
.container p{
    font-family: 'Lucida Sans', 'Lucida Sans Regular', 'Lucida Grande', 'Lucida Sans Unicode', Geneva, Verdana, sans-serif;
    color: rgb(184, 180, 176);
    font-weight: 500;
    font-size: 14px;
    margin: 0px 10px 0px 10px;
    text-align: justify;
}
@media (max-width: 1071px) {

    .botton_volver {     
        margin-top: 20px;
    }
}
@media (max-width: 640px) {
    .contenedor {
        display: flex;
        flex-direction: column-reverse;        
        
    }
    .botton_volver {     
        margin-top: 0px;
    }
}