.header {
    margin-top: 10px;
    padding-bottom: 15px;
    border-bottom: 1px solid #8a8a8a;
    font-size: 30px;
    text-align: center;
}
.section {
    width: auto;
    margin-left: 25%;
    margin-right: 25%;
    padding-top: 30px;
}
.content-reloj {
    border: 1px solid black;
}
.leyenda {
    border-top: 1px solid #cccccc;
    text-align: center;
}
.reloj {
    text-align: center;
    border-radius: 50%;
    border: 1px solid #cc3c3ccc;
    margin-left: 25%;
    margin-right: 25%;
    padding-top: 10px;
    padding-bottom: 10px;
    margin-top: 20px;
    margin-bottom: 20px;
    box-shadow: 0px 0px 10px #3c3cc3;
}
#crono {
    font-size: 100px;
}
footer {
    margin-top: 15px;
    border-top: 1px solid #3d3d3d;
    font-size: 30px;
}