h1 {
  padding: 3em;
  color: white;
  margin: 0;
  opacity: 1;
  font-size: 200%;
}
h1 a, h1 a:hover {
  color: white;
}

#head {
  opacity: 0.5;
  background-color: black;
  padding: 5em;
  margin: 0;
}

#all {
  position: relative;
  z-index: 1;
  height: 1000px;
}

div#content {
  padding: 1em;
}

#all::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: .4;
  z-index: -1;
  background-size: cover;
}

#slamovi #all::before {
  background-image: url("images/slamovi.jpg");
}

#esta #all::before {
  background-image: url("images/esta.jpg");
}
#derek #all::before {
  background-image: url("images/derek.jpg");
}

#jirka #all::before {
  background-image: url("images/jirka.jpg");
}

ul {
  list-style-type: none;
  text-align: center;
  line-height: 2em;
  padding: 1em;
  padding-inline-start: 0;
  margin: 0;
}

#menu li {
  padding: 1em;
  margin: 0;
}

body {
  text-align: center;
  font-family:Aileron-Regular, sans-serif;
  margin: 0;
  padding: 0;
  line-height: 1.5em;
  color: black;
}

a {
  color: black;
  text-decoration: none;
  font-weight: bold;
}

a:hover {
  color: black;
  text-decoration: underline;
  font-weight: bold;
}