index3.css

body {
  background: linear-gradient(rgb(239, 193, 245), rgb(147, 232, 251));
  font-family: 'Karma', serif;
  font-size: 1.2em;
}

h1 {
  text-shadow: 2px 2px 2px #8c8989;
  box-shadow: 5px 5px 2px #797575;
  text-align: center;
  margin-bottom: 5px;
  background-color: rgb(232, 231, 121);
  text-decoration: underline;
  font-size: 150%;
}

h2 {
  text-decoration: underline;
  margin-bottom: 3px;
}

ul {
  text-align: center;
  margin: 0;
  padding: 0;
  list-style-type: none;
}

p {
  margin-top: 2px;
  margin-bottom: 2px;
  text-align: justify;
}

figure {
  float: right;
}

img {
  border-radius: 5px;
}

img:hover {
  transform: scale(1.1);
}

.imagen1 {
  width: 300px;
}

.imagen2 {
  width: 80px;
  align: center;
}

section {
  margin-bottom: 15px;
  margin-top: 15px;
  border-radius: 5px;
  text-align: justify;
  display: inline-block;
  width: 650px;
  height: auto;
  margin-left: 10px;
}

.introduccion {
  width: 96%;
  display: block;
}

.videos {
  width: 1200px;
  text-align: center;
}

footer {
  margin-top: 5px;
  background: rgb(249, 214, 148);
  box-shadow: 5px 5px 2px #797575;
}

footer>h2 {
  text-align: center;
}

footer a {
  border-radius: 8px;
  margin-left: 400px;
  width: 100px;
  height: 80px;
  display: inline-block;
}

.bloqueimagen, .bloquetemperamento {
  width: 640px;
  display: inline-block;
  margin: 5px 5px;
}

.bloqueimagen img {
  width: 270px;
  height: 270px;
  margin: 5px 5px;
  float: left;
  border-radius: 5px;
}

.retorno a {
  display: block;
  width: 20%;
  color: rgb(0, 0, 0);
  background-color: rgba(237, 178, 25, 0.73);
  text-decoration: none;
  font-size: 120%;
  margin-left: 3px;
  padding-top: 7px;
  padding-bottom: 7px;
  border-radius: 3px;
  text-align: center;
  border-style: solid;
  border-width: 2px;
  border-color: rgb(24, 61, 7);
  font-variant: small-caps;
  width: 150px
}

li:hover {
  transform: scale(1.2);
}

.retorno a:hover {
  background-color: rgb(249, 239, 14);
}

nav {
  margin: auto;
}

nav>ul>li {
  border-width: 2px;
  border-style: solid;
  box-shadow: 5px 5px 2px #797575;
  border-color: rgb(182, 106, 27);
  text-decoration: underline;
}

ul>li {
  margin-top: 15px;
  text-align: center;
  width: 270px;
  display: inline-block;
  border-radius: 5px;
}

ul li a {
  background-color: #e3c216;
  color: rgb(0, 0, 0);
  font-size: 20px;
  font-weight: bolder;
  border-radius: 5px;
  text-decoration: none;
  padding: 10px 12px;
  display: block;
}

iframe {
  display: inline-block;
  width: 400px;
  height: 315px;
}

strong {
  font-size: 110%;
  text-decoration: underline;
}

@media screen and (min-width: 600px) and (max-width:1023px) {
  .imagen1 {
    width: 160px;
  }
  figcaption {
    display: none
  }
  section {
    width: 47%;
    margin-right: 5px;
    margin-left: 5px;
  }
  .introduccion {
    width: 96%;
    margin: auto;
    display: block;
  }
  .videos {
    width: 98%;
    margin: auto;
    text-align: center;
  }
  footer a {
    margin-left: 35%;
  }
  .bloquetemperamento {
    width: 48%;
  }
  .bloqueimagen {
    width: 46%;
  }
  .bloqueimagen img {
    width: 230px;
    height: 230px;
  }
  li:hover {
    transform: scale(1.1);
  }
  ul>li {
    width: 30%;
  }
  iframe {
    width: 48%;
  }
}

@media screen and (max-width:599px) {
  .imagen1 {
    width: 160px;
  }
  figcaption {
    display: none
  }
  section {
    width: 99%;
    margin-right: 5px;
    margin-left: 5px;
  }
  .introduccion {
    width: 96%;
  }
  .videos {
    width: 98%;
  }
  footer a {
    margin-left: 35%;
  }
  .bloquetemperamento {
    width: 99%;
  }
  .bloqueimagen {
    width: 99%;
  }
  .bloqueimagen img {
    width: 150px;
    height: 150px;
  }
  li:hover {
    transform: scale(1.0);
  }
  ul>li {
    width: 100%;
  }
  .retorno a {
    width: 90%
  }
  iframe {
    width: 100%;
  }
}