h1.display-3 { font-size: 3vw; }
h2 { margin: 2rem 0 !important; }
.error { color: red; margin-bottom: 1rem; }
.form-check-label { cursor: pointer; }
.img-thumbnail { max-height: 200px; margin: 2rem auto; }

body { background: #fff; color: #141414; }
h1, .h1, h2, .h2, h3, .h3, h4, .h4, h5, .h5, h6, .h6 { color: #000; }
.img-thumbnail { background: #f2f2f2; }
.bg-light { box-shadow: 3px 3px 10px rgba(0,0,0,0.5); }

#footer { background: #4d4a59 url(https://lus.org.pl/images/bgfooter.png) no-repeat center; }