body, html{
  margin: 0;
  padding: 0;
  height: 100%;
}

.container{
  width: 100%;
  min-height: 100%;
  margin-left: auto;
  margin-right: auto;
  display: flex;
  flex-direction: column;
}

#soundboard {
  flex: 1 0;
  background: url('./img/fondo.jpg') no-repeat center;
  background-size: cover;
  display: flex;
  flex-direction: column;
  box-sizing: border-box;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  align-content: center;
}

.conjunto {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
}

#credits {
  display: flex;
  justify-content: flex-end;
}

.ruido {
  box-shadow: 0px 0px 20px 0px black;
  color: white;
  text-shadow: -1px 0 black, 0 1px black, 1px 0 black, 0 -1px black;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  font-size: 24px;
  border-radius: 50%;
  line-height: 180px;
  text-align: center;
  background-size: cover;
  border: 5px solid white;
  margin: 30px 15px;
  height: 180px;
  width: 180px;
  transition: all 0.3s ease;
  cursor: pointer;
}

.ruido#ruido1 {
  background: url('./img/cafetera.jpg') no-repeat center;
  background-size: contain;
}

.ruido#ruido2 {
  background: url('./img/despertador.jpg') no-repeat center;
  background-size: contain;
}

.ruido#ruido3 {
  background: url('./img/discoteca.jpg') no-repeat center;
  background-size: contain;
}

.ruido#ruido4 {
  background: url('./img/metro.jpg') no-repeat center;
  background-size: contain;
}

.ruido#ruido5 {
  background: url('./img/obras.jpg') no-repeat center;
  background-size: contain;
}

.ruido#ruido6 {
  background: url('./img/oficina.jpg') no-repeat center;
  background-size: contain;
}

.ruido#ruido7 {
  background: url('./img/secador.jpg') no-repeat center;
  background-size: contain;
}

.ruido#ruido8 {
  background: url('./img/trafico.jpg') no-repeat center;
  background-size: contain;
}

.ruido:hover {
  box-shadow: 0px 0px 20px 0px black;
  opacity: 0.8;
}