@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@400;700&display=swap');
@import url('https://fonts.googleapis.com/css2?family=Lato:ital,wght@0,400;0,700;1,400;1,700&family=Poppins:wght@400;700&display=swap');



body {
  background-color: #5e5e80;
  color: #fff;
  margin: auto;
  font-family: Lato;
  font-weight: 400;
  scroll-behavior: smooth;
  transition: all 0.5s ease;
}

div.main {
  /*display: block;*/
  margin-left: auto;
  margin-right: auto;
  background-color: #36364a;
  width: 70vw;
  min-height: 100vh;
  max-height: 100%;
  transition: all 0.5s ease;
  overflow-x: hidden;
  scroll-behavior: smooth;
}

img.header {
  width: 100%;
  /*object-fit: cover;*/
  margin: 0;
}

div.nav {
  background-color: #ddd;
  color: #000;
  position: sticky;
  top: 0;
  padding: 10px;
  border: none;
}

div.nav ul {
  text-align: center;
  margin: 0;
  padding: 0;
}

div.nav ul li {
  display: inline-block;
  padding: 0 20px;
}

div.body {
  padding: 10px;
}

h2 {
  font-family: Poppins;
  font-weight: 700;
  margin: 10px 0 0 0;
}

h3 {
  font-family: Poppins;
  font-weight: 700;
  margin: 0;
  scroll-behavior: smooth;
}

p {
  font-family: Lato;
  font-weight: 400;
  margin: 0;
}

p.b {
  font-weight: 700;
}

a {
  color: #fff;
  text-decoration: none;
  transition: all 0.3s ease;
  text-decoration: underline;
}

a:hover {
  color: #dadada;
  text-decoration: none;
}

div.ytvideo {
  width: 100%;
  justify-content: center;
  align-items: center;
  padding: auto;
  margin: 2vh 0;
}

div.ytvideo iframe {
  display: block;
  margin-left: auto;
  margin-right: auto;
  width: 71%;
  height: auto;
  aspect-ratio: 16 / 9;
}

div.ytcaption {
  background-color: #afafaf;
  color: #222;
  display: block;
  margin-left: auto;
  margin-right: auto;
  width: 71%;
  padding: 2vh 0;
  text-align: center;
  font-style: italic;
}

@media (prefers-color-scheme: light) {
  body {
    background-color: #cfcfcf;
    color: #000;
  }
  
  div.main {
    background-color: #fff;
  }

  div.nav {
    background-color: #15151d;
    color: #fff;
  }

  a {
    color: #000;
  }

  a:hover {
    color: #cb2f3d;
  }
}

@media screen and (max-device-width: 623px) {
  div.nav ul {
    display: none;
  }
}

@media screen and (max-device-width: 480px) {
  div.main {
    width: 100%;
  }

  div.ytvideo iframe {
    width: 100%;
  }

  div.ytcaption {
    width: 100%;
  }
}