html {
  scroll-behavior: smooth;
}
body {
  display: flex;
  flex-direction: column;
  background-image: linear-gradient(rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.5)),
    url("https://codetheweb.blog/assets/img/posts/full-image-hero/image.jpg");
  background-size: cover;
  background-position: center center;
  background-repeat: no-repeat;
  background-attachment: fixed;
  margin: 0; /*tamaño externo*/
  font-family: "Oswald", sans-serif;
}
header {
  position: fixed;
  width: 100%;
  background-color: black;
  color: lightcoral;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
#logo {
  padding-left: 5%;
}
ul a {
  padding: 1em;
  text-decoration: none;
  color: inherit;
}
ul a:hover {
  color: black;
  background-color: lightcoral;
}
.button-header {
  background-color: #000000;
  color: lightcoral;
  cursor: pointer;
  border: inherit;
  font-family: inherit;
  font-size: inherit;
}
.button-header:hover {
  background-color: lightcoral;
  color: black;
}
.modal {
  display: none;
  position: fixed;
  z-index: 1;
  left: 0;
  top: 0;
  height: 100%;
  width: 100%;
  overflow-x: hidden;
  overflow-y: hidden;
  background-color: rgba(0, 0, 0, 0.5);
}
.modal-content {
  background-color: rgba(0, 0, 0, 0.5);
  color: white;
  margin: 20% auto;
  align-items: center;
  padding: 1em;
  width: 30%;
  box-shadow: 0 5px 8px 0 rgba(0, 0, 0, 0.5), 0 7px 20px 0 rgba(0, 0, 0, 0.5);
  border: 3px solid white;
}
.closebtn {
  color: rgba(255, 255, 255, 0.5);
  font-size: 2.5em;
  float: right;
  margin-top: -0.5em;
}
.closebtn:hover {
  color: white;
  cursor: pointer;
}
.modal-content h2 {
  display: flex;
  justify-content: center;
  align-items: center;
}
main {
  display: flex;
  flex-direction: column;
}
.hero {
  color: white;
  height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
}
.hero h1 {
  font-size: 5em;
  margin-top: 0;
  margin-bottom: -0.2em;
}
.hero-btn {
  display: block;
  width: 200px;
  padding: 0.5em;
  margin-top: 50px;
  border: 3px solid white;
  border-radius: 20px;
  text-decoration: none;
  color: inherit;
  font-size: 1.5em;
  margin-top: -0.2em;
  margin-left: auto;
  margin-right: auto;
  background-color: rgba(0, 0, 0, 0.5);
}
.middle {
  background-color: lightcoral;
  height: 100vh;
  font-size: 1.5em;
  margin: 5%;
  display: flex;
  flex-direction: column;
}
.middle1 {
  background-image: linear-gradient(
    to right,
    #f08080,
    #f08080,
    #af5e65,
    #000000,
    #000000,
    #000000
  );
  color: black;
  display: flex;
  flex-direction: row;
  height: 50vh;
}
.middle1 .sub1 {
  align-items: center;
  justify-content: center;
  flex: 1;
  margin: 5%;
}
.middle1 .sub2 {
  flex: 1;
  display: flex;
  justify-content: center;
  align-items: center;
  margin: 5%;
}
.middle2 {
  background-color: black;
  color: lightcoral;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 50vh;
}
.middle2 .sub {
  margin: 5%;
}
#clases {
  color: white;
  height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}
#clases h2 {
  display: flex;
  justify-content: center;
  margin: 5%;
}
#clase iframe {
  margin: 5%;
  display: flex;
  justify-content: center;
  align-items: center;
}
footer {
  background-color: black;
  color: lightcoral;
  display: flex;
  justify-content: center;
}