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%;
}

body {
    background-image: url('https://mir-s3-cdn-cf.behance.net/project_modules/max_3840/885bbe211643295.67275e664f77d.png');
    background-position: center center;
    background-repeat: no-repeat;
    background-size: cover;
    margin-bottom: 60px;
}
nav {
    opacity: 0.5;
}
footer {
    opacity: 0.5;
    background-color: white;
}