header {
  background: #22282e;
  height: 60px;
  position: relative;
  width: 100%;
  
}

#logo {
  float: left;
  /*padding: 0px 0px;*/
  margin-top: 0;
  width: auto;
  height: 60px;
}
#logo a {
  display: block;
  text-decoration: none;
  text-align: center;
  color: #fff;
  font-weight: bold;
  line-height: 44px;
  text-transform: uppercase;
}

#menu {
  position: absolute;
  top: 60px;
  width: 100%;
}
#menu ul {
  max-height: 0;
  overflow: hidden;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 14px;
}
#menu li {
  display: block;
  background: #33363b;
  text-transform: uppercase;
  text-align: center;
  border-bottom: 1px solid #282b30;
}
#menu li a {
  display: block;
  color: #fff;
  text-decoration: none;
  line-height: 60px;
  padding: 0 26px;
}
#menu li a:active, #menu li a:focus {
  color: #ffc700;
}
#menu .open-menu {
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.5);
  max-height: 400px;
  transition: max-height 0.4s ease;
}

#nav-mobile {
  background: transparent;
  border: 0;
  cursor: pointer;
  float: right;
  width: 60px;
  height: 60px;
  position: absolute;
  right: 0;
  top: -60px;
  opacity: 0.6;
}
#nav-mobile.nav-open {
  opacity: 1;
}
#nav-mobile span {
  display: block;
  width: 60%;
  margin: 4px auto;
  height: 4px;
  background: #fff;
}

@media only screen and (min-width: 768px) {
  #nav-mobile {
    display: none;
  }

  #menu {
    width: auto;
    float: right;
    top: 0;
    position: relative;
  }
  #menu .open-menu {
    box-shadow: none;
  }
  #menu ul {
    max-height: inherit;
  }
  #menu li {
    float: left;
    border: 0;
    background: transparent;
  }
  #menu li a {
    display: block;
    color: #fff;
    padding: 0 26px;
  }
  #menu li a:hover {
    color: #ffc700;
    background: #151a1e;
  }
}
/* Content */
main {
  display: flex;
  min-height: 400px;
  color: #fff;
  margin: 15px;
  align-items: center;
  background-image: linear-gradient(to right, #f78ca0 0%, #f9748f 19%, #fd868c 60%, #fe9a8b 100%);
}

main h1 {
  width: 100%;
  text-align: center;
}

.collapsible {
  background-color: #777;
  color: white;
  cursor: pointer;
  padding: 18px;
  width: 100%;
  border: none;
  text-align: center;
  outline: none;
  font-size: 18px;
}
.actiactiveve, .collapsible:hover {
  background-color: #555;
}

.content {
  padding: 0 18px;
  display: none;
  overflow: hidden;
  background-color: #f1f1f1;
}

   body {
        color: black;
        font-family: Helvetica, Arial, sans-serif;
        font-size: 12px;
        background-color: #FFEFD5;
        
    }
    
    .titulo{
        color:yellow;
        font-size: 20px;
        padding: 15px;
        margin: auto;
        width: 45%;
        text-align: center;
    }
    .tema{
        color:black;
        font-size: 12px;
        padding: 15px;
        margin: auto;
        width: 45%;
        text-align: center;
    }
    .presentacion{
        text-align: justify;
        padding: 10px;
        font-size: 12px;
        font-family: Helvetica, Arial, sans-serif;
    }