* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: verdana, arial, helvetica, sans-serif;
}

body {
  background-color: rgb(222, 222, 224);
  font-size: 16px;
}

header {
  display: flex;
  align-items: center;
  justify-content: flex-start; /* statt flex-end */
  padding: 30px 10%;
  background-color: #24252a;
  gap: 20px; /* Abstand zwischen Burger und Logo */
}

.overlay_content a {
  text-decoration: none;
  color: white;
}

.logo {

  color: white;
}

.overlay_content a {
  font-family: "Lucida Console", Courier, monospace;
  font-weight: 500;
  color: #edf0f1;
  text-decoration: none;
}

.overlay {
  height: 100%;
  width: 0;
  position: fixed;
  z-index: 1;
  left: 0;
  top: 0;
  background-color: #24252a;
  overflow-x: hidden;
  transition: all 0.5s ease 0s;
}

.overlay-active {
  width: 20%;
}

.overlay_content {
  display: flex;
  height: 100%;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.overlay a {
  padding: 15px;
  font-size: 36px;
  display: block;
  transition: all 0.3s ease 0s;
}

.overlay a:hover,
.overlay a:focus {
  color: #0088a9;
}

.overlay .close {
  position: absolute;
  top: 20px;
  right: 45px;
  font-size: 60px;
  color: #edf0f1;
  cursor: pointer;
}

.overlay a {
  font-size: 20px;
}

.overlay .close {
  font-size: 40px;
  top: 15px;
  right: 35px;
}

.center {
  text-align: center;
}

footer {
  text-align: center;
  padding: 3px;
  background-color: #24252a;
  color: white;
}

footer p {
  margin-top: 20px;
  margin-bottom: 20px;
}

.link {
  text-decoration: none;
  border-bottom: solid;
  border-bottom-width: 2px;
}

.link:hover {
  filter: brightness(1.2);
}

button {
  background-color: transparent;
  border: none;
  color: white;
  padding: 10px 20px;
  text-align: center;
  text-decoration: none;
  display: inline-block;
  font-size: 20px;
  margin: 5px;
  border-radius: 7.5px;
  border-bottom-color: white;
  border-bottom: solid;

  color: white;
}

button:hover {
  filter: brightness(1.15);
}

.overlay_content a {
  background-color: transparent;
  border: none;
  color: white;
  padding: 10px 20px;
  text-align: center;
  text-decoration: none;
  display: inline-block;
  font-size: 20px;
  margin: 5px;
  border-radius: 7.5px;
  border-bottom-color: white;
  border-bottom: solid;
  margin: 10px;
  color: white;
}

.overlay_content a:hover {
  filter: brightness(1.15);
}


/* Small screen / (tablet) / 760px to 991px */
@media (max-width: 991px) {
  .logo {
    font-size: 12px;
  }
  .overlay-active {
    width: 100%;
  }
  button {
    margin: 1px;
    font-size: 11px;
  }
  .hero img {
    width: 100%;  
    height: 100%;
  }
}

/* Smaller screen / tablet+(phone) / 480px to 759px */
@media (max-width: 759px) {
  .logo {
    font-size: 12px;
  }
  .overlay-active {
    width: 100%;
  }
  button {
    margin: 1px;
    font-size: 11px;
  }
  .hero img {
    width: 100%;  
    height: 100%;
  }
}

iframe {
   width: 100%;
   height: 120px; /* 180px */
}

.hero img {
  width: 75%;  
  height: 75%;
}

.navi {
  display: inline-block;
  cursor: pointer;
}

.bar1, .bar2, .bar3 {
  width: 35px;
  height: 5px;
  background-color: white;
  margin: 6px 0;
  transition: 0.4s;
}

.change .bar1 {
  -webkit-transform: rotate(-45deg) translate(-9px, 6px);
  transform: rotate(-45deg) translate(-9px, 6px);
}