body {
  width: 90%;
  max-width: 900px;
  margin: auto;
}

header {
  position:sticky;
  top:0;
  z-index: 10;
}

h1 {
    background-color:   rgb(54, 51, 51);
    height: 300px;
    color: whitesmoke;
    background-repeat: no-repeat;
    background-size:cover;
    font-family: 'Times New Roman', Times, serif;
    font-size: 30px;
    text-align: left;
    margin-top: 0%;
    margin-bottom: 0%;
}


.container {
    display: grid;
    grid-template-columns: 0.5fr 2fr;
    height: 600px;
    background-color: rgb(24, 23, 23);
    max-width: 900px;
}

.bigcard {
  background-color: rgb(24, 23, 23);
    max-width: 900px;
    padding-top: 50px;
    margin-right: 20px;
    margin-left: 20px;
    color: whitesmoke;
    height: 400px;
    padding-left: 10px;
}

footer {
    background-color: rgb(47, 42, 42);
    height: 200px;
    display: grid;
    grid-template-columns: 1fr 1fr 1fr 1fr;
    padding-left: 150px;
    color: white;
}

.links {
  width: 100%;
  max-width: 900px;
  margin:auto;
  background-color: rgb(116, 176, 202);
  height: 50px;
}

nav {
  float: right;
}

nav ul {
margin: 0;
padding: 0;
list-style: none;
}

nav li {
  display:inline-block;
  margin-left: 5px;
  padding-top: 12px;
  margin-right: 25px;
}

.thumb-bar img {
  display: block;
  width: 20%;
  float: left;
  cursor:pointer;
  float:left;
}

.displayed-img {
  border-radius: 5px;
  width: 550px;
  padding-top:40px;
  padding-right: 50px;
  padding-left: 45px;
}

.dark {
  border-radius: 5px;
}

html {
  background-color: rgba(0, 0, 0, 0.623);
}







.full-img {
  position: relative;
  display: block;
  width: 640px;
  height: 480px;
}

.overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 640px;
  height: 480px;
  background-color: rgba(0,0,0,0);
}

button {
  border: 0;
  background: rgba(150,150,150,0.6);
  text-shadow: 1px 1px 1px white;
  border: 1px solid #999;
  position: absolute;
  cursor: pointer;
  top: 2px;
  left: 2px;
}

.thumb-bar img {
  display: block;
  width: 20%;
  cursor: pointer;
}

.bigcard1 {
  background-color:rgb(54, 51, 51);
  padding-left: 0px;
  max-width: 640px;
  padding-top: 50px;
  margin-right: 0px;
  color: white;
}

.videos {
  padding-top:50px;
  margin: 5px;
}

h3 {
  padding-top:0px;
  margin-top: 0%;
}




.bigcard2 {
  background-color: rgb(24, 23, 23);
  width: 640px;
  padding-top: 0px;
  margin-right: 50px;
  color: whitesmoke;
  height: 600px;
}



.full-img2 {
  position: relative;
  display: block;
  width: 900px;
  height: 300px;
}


.displayed-img2 {
  border-radius: 0px;
  width: 900px;
  padding-top:0px;
  padding-right: 0px;

}

.container2 {

  height:700;
  background-color: rgb(24, 23, 23);
  width: 900px;
  padding-top: 0px;
}


.bigcard3 {
  background-color: rgb(24, 23, 23);
  max-width: 640px;
  padding-top: 50px;
  margin-right: 70px;
  margin-left: 180px;
  color: whitesmoke;
  height: 700px;
  padding-left: 20px;
  padding-right: 20px;
}