html {
  font-size: 14px;
}

@media (min-width: 768px) {
  html {
    font-size: 16px;
  }
}

.btn:focus, .btn:active:focus, .btn-link.nav-link:focus, .form-control:focus, .form-check-input:focus {
  box-shadow: 0 0 0 0.1rem white, 0 0 0 0.25rem #258cfb;
}

html {
  position: relative;
  min-height: 100%;
}

main{
    margin-bottom: 10rem;
}

.clickable:hover{
    cursor: pointer;
}

.container-box {
    position: relative;
    border: 1px solid;
    margin: 2rem;
    margin-top: 1rem;
    padding: 2rem;
    min-height: 200px;
    display: flex;
    flex-flow: column;
    justify-content: space-evenly;
    align-items: center;
    text-align: center;
    transition: transform 400ms;

    /* prevent select */
    -webkit-user-select: none; /* Safari */
    -ms-user-select: none; /* IE 10 and IE 11 */
    user-select: none; /* Standard syntax */
}

.container-box:hover{
    transform: translateY(-1rem);
}

section{
    margin-top: 8rem;
    text-align: center;
}

.container-box-section{
    margin-bottom: 4rem;
    margin-top: 4rem;
}
@media (min-width: 576px) {
    .container-box-section {
        display: flex;
        flex-wrap: wrap;
        justify-content: center;
    }

    .container-box {
        width: 25%;
        min-width: 300px;
    }
}

#heading{
    text-align: center;
    font-weight: bold;
}