* {
    box-sizing: border-box;
}
body {
    font-family: "Roboto", Arial, sans-serif;
    background-color: #fff;
    margin: 0;
    padding: 0;
}
section {
    padding: 64px;
}
div {
    display: block;
}
.row {
    display: flex;
    flex-wrap: wrap;
    margin-right: -7.5px;
    margin-left: -7.5px;
}
.col {
    position: relative;
    width: 100%;
    max-width: 90%;
    padding-right: 15px;
    padding-left: 15px;
  }
.w-50 {
    width: 50%;
}
.mx-auto {
  margin-left: auto !important;
  margin-right: auto !important;
}
.hide {
    display: none;
}
.title {
    text-align: center;
}

/* nav */
.nav {
    display: flex;
    flex-wrap: wrap;
    flex-direction: row;
    justify-content: end;
    list-style: none;
    color: #17a2b8;
    background-color: #f8f9fa;
}
ul {
    margin: 0;
    padding: 0;

}
li {
    display: list-item;
}
a {
    text-decoration: none;
}
a:visited {
    text-decoration: none;
    color: #17a2b8;
}
.nav-link {
    padding: 16px 8px;
    display: flex;
    flex-wrap: wrap;
    flex-direction: column;
    text-align: center;
    width: 100%;
}
.nav-link:hover {
    color: #17a2b8;
    background-color: #B0F6FF;
}
.nav-link:visited {
    color: #17a2b8;
}
.active {
    color: #fff;
    background-color: #17a2b8;
}
.nav-link.active:visited {
    color: #fff;
}
.active:hover {
    color: #fff;
    background-color: #17a2b8;
}
/* card */
.card {
    display: flex;
    flex-direction: column;
    background-color: #fff;
    border: 0 solid rgba(0,0,0,.125);
    border-radius: 8px;
    box-shadow: 0 0 1px rgba(0,0,0,.125), 0 1px 3px rgba(0,0,0,.2);
    margin-bottom: 1rem;
}
.card .card-header {
    padding: 8px 16px;
    border-bottom: 1px solid rgba(0,0,0,.125);
}
.card-primary .card-header {
    color: #fff;
    background-color: #007bff;
    border-radius: 8px 8px 0px 0px;
}
.card-success .card-header {
    color: #fff;
    background-color: #28a745;
}
.card .card-header .card-title {
    float: left;
    font-size: 1.1rem;
    font-weight: 400;
    margin: 0;
}

.card .card-body {
    padding: 1.25rem;
}
.card .img {
    display: flex;
    justify-content: center;
    align-items: center;
    border-bottom: 1px solid rgba(0,0,0,.125);
}
.card .card-footer {
    padding: 20px 12px;
    background-color: rgba(0,0,0,.03);
    border-top: 0 solid rgba(0,0,0,.125);
}
label {
    display: inline-block;
    margin-bottom: 0.5rem;
    cursor: default;
}
.form-group {
    margin-bottom: 1rem;
}
.form-control {
    display: block;
    width: 100%;
    height: calc(2.25rem + 2px);
    padding: 0.375rem 0.75rem;
    font-size: 1rem;
    font-weight: 400;
    line-height: 1.5;
    color: #495057;
    background-color: #fff;
    background-clip: padding-box;
    border: 1px solid #ced4da;
    border-radius: 0.25rem;
    box-shadow: inset 0 0 0 transparent;
    transition: border-color .15s ease-in-out,box-shadow .15s ease-in-out;
}

/* footer */
.footer {
    background-color: #f8f9fa;
    padding: 16px;
    margin-top: 50px;
}

.footer p {
    margin-bottom: 0;
}

.footer a {
    color: #6c757d;
}

.footer a:hover {
    color: #212529;
}

.footer .social-icons {
    font-size: 20px;
}

.footer .social-icons a {
    display: inline-block;
    color: #6c757d;
    margin-right: 15px;
}

.footer .social-icons a:hover {
    color: #212529;
}

@media (max-width: 767px) {
    .footer {
        text-align: center;
    }

    .footer .social-icons {
        margin-top: 15px;
    }

    .footer .social-icons a {
        display: block;
        margin: 0 auto 10px auto;
    }
}
    
.sticky-bottom {
    position: -webkit-sticky;
    position: sticky;
    bottom: 0;
}
.sticky-top {
    position: -webkit-sticky;
    position: sticky;
    top: 0;
    z-index: 1030;
}

/* button */
.btn {
    display: inline-block;
    font-weight: 400;
    color: #212529;
    text-align: center;
    vertical-align: middle;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
    background-color: transparent;
    border: 1px solid transparent;
    padding: 0.375rem 0.75rem;
    font-size: 1rem;
    line-height: 1.5;
    border-radius: 0.25rem;
    transition: color .15s ease-in-out,background-color .15s ease-in-out,border-color .15s ease-in-out,box-shadow .15s ease-in-out;
}
.btn-info {
    color: #fff;
    background-color: #17a2b8;
    border-color: #17a2b8;
    box-shadow: none;
}
.btn-default {
    background-color: #f8f9fa;
    border-color: #ddd;
    color: #444;
}
/* mobile view */
@media (max-width: 768px) {
    .w-50 {
        width: 100%;
    }
}