* {
  box-sizing: border-box;
  font-family: Arial, Helvetica, sans-serif;
  color: white;
}

body{
  background-color: #333;
  color: white;
  margin: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}

.btn{
  justify-content: center;
  align-items: center;
}

h2{
  text-align: center;
  margin: 20px;
  padding-top: 100px;
  font-weight: 900;
}

h3{
  margin: 40px;
}

h4{
  margin: 65px;
}

li{
  margin-left: 90px;
}

p{
  margin: 70px;
}

.btnContainer{
  text-align: center;
}

.image{
  margin: 90px;
  text-align: center;
}

@keyframes scroll {
  0% { background-position: 0% 0%; }
  50% { background-position: 300% 0%; }
  100% { background-position: 0% 0%; }
}

header{
  padding-top: 74px;
  padding-bottom: 6rem;
  background-image: url(https://experimentoscaseros.xyz/img/fondo-formulas.webp);
  background-position: center;
  animation-timing-function: linear;
  animation-iteration-count: infinite;
  animation-duration: 100s;
  animation-name: scroll;
}

.contenedor{
  background-image: url(https://i.ytimg.com/vi/HTSdCsPTq84/maxresdefault.jpg);
}

header p{
  color: white;
  text-align: center;
  padding: 20px;
}

header h1{
  color: white;
  text-shadow: 0px 3px brown;
  text-align: center;
}

#lienzo {
  border-radius: 5px;
  background-color: #f0f0f0;
}