.card {
    margin: 0 auto; /* Added */
    float: none; /* Added */
    margin-bottom: 10px; /* Added */
    width: 18rem;
    height: 40rem;
}
hr {
    display: block;
    height: 1px;
    border: 0;
    border-top: 1px solid white;
    margin: 1em 0;
    padding: 0;
}
.mdi-150px {
    font-size: 150px;
}
/*@media (max-width: 576px) {*/
/*    .mdi-sm-size {*/
/*        font-size: 50px;*/
/*    }*/
/*}*/
.hover-docker:hover {
    background-color: white;
    color: #146FB6;
    transition: 0.3s;
}
.hover-kubernetes:hover {
    background-color: white;
    color: #336DE6;
    transition: 0.3s;
}
.hover-php:hover {
    background-color: white;
    color: #777BB3;
    transition: 0.3s;
}
.hover-symfony:hover {
    background-color: white;
    color: #000000;
    transition: 0.3s;
}
.hover-vuejs:hover {
    background-color: white;
    color: #59BB85;
    transition: 0.3s;
}
.hover-vuetify:hover {
    background-color: white;
    color: #7BC5FD;
    transition: 0.3s;
}
.hover-c:hover {
    background-color: white;
    color: #3949AB;
    transition: 0.3s;
}
.hover-cpp:hover {
    background-color: white;
    color: #03589E;
    transition: 0.3s;
}
.hover-python:hover {
    background-color: white;
    color: #FCD13F;
    transition: 0.3s;
}
.form-label-group {
    position: relative;
    margin-bottom: 1rem;
}

.form-label-group > input,
.form-label-group > label {
    height: 3.125rem;
    padding: .75rem;
}

.form-label-group > label {
    position: absolute;
    top: 0;
    left: 0;
    display: block;
    width: 100%;
    margin-bottom: 0; /* Override default `<label>` margin */
    line-height: 1.5;
    color: #495057;
    pointer-events: none;
    cursor: text; /* Match the input under the label */
    border: 1px solid transparent;
    border-radius: .25rem;
    transition: all .1s ease-in-out;
}

.form-label-group input::-webkit-input-placeholder {
    color: transparent;
}

.form-label-group input:-ms-input-placeholder {
    color: transparent;
}

.form-label-group input::-ms-input-placeholder {
    color: transparent;
}

.form-label-group input::-moz-placeholder {
    color: transparent;
}

.form-label-group input::placeholder {
    color: transparent;
}

.form-label-group input:not(:placeholder-shown) {
    padding-top: 1.25rem;
    padding-bottom: .25rem;
}

.form-label-group input:not(:placeholder-shown) ~ label {
    padding-top: .25rem;
    padding-bottom: .25rem;
    font-size: 12px;
    color: #777;
}

/* Fallback for Edge
-------------------------------------------------- */
@supports (-ms-ime-align: auto) {
    .form-label-group > label {
        display: none;
    }
    .form-label-group input::-ms-input-placeholder {
        color: #777;
    }
}

/* Fallback for IE
-------------------------------------------------- */
@media all and (-ms-high-contrast: none), (-ms-high-contrast: active) {
    .form-label-group > label {
        display: none;
    }
    .form-label-group input:-ms-input-placeholder {
        color: #777;
    }
}