*
{
    padding: 0;
    margin: 0;
    border: 0;
}

header
{
    background-color: #265a88;
}

article
{
    height: 300px;
    background-color: #28a4c9;
}
aside
{
    height: 300px;
    background-color: #c9302c;
}
ul
{
    list-style-type: none;
    text-align: center
}

.black
{
    color:black;
}
.btn{
        background-color: transparent
}

.bg-second
{
    background-color: #2E64FE;
}

.text-second {
  color: #2E64FE !important;
}