index.css

body {
  margin: 0;
}

nav{
  display: flex;
  position: fixed;
  height: 100px;
  width: 100%;
  background-color: rgb(59, 89, 152);
}

#logo{
  margin-top: 20px;
  margin-left: 80px;
  height: 80px;
  width: 700px;
  background-image: url("webimages/facebook-logo.jpg");
  background-size: contain;
  background-repeat: no-repeat;
}

nav ul{
  display: flex;
  height: 100px;
  width: 700px;
  margin-left: 300px;
  margin-top: 50px;
}

nav ul li{
  margin-left: 50px;
  display: inline;
}

nav ul li a{
  color: white;
  text-decoration: none;
}

/*comments shortcut : Ctrl+? */

#major-part{
  display: flex; /* only to fix margin collapsing*/
  height: 700px;
  width : 100%;
  background-color: rgb(237, 240, 245); /*first black to clear out then this*/
}

.photos-collection{
  margin-top: 100px;
  height: 600px;
  width: 700px;
}

.picture-box{
  /*margin-top: 100px; doesn't affect now*/
  display: inline-block;
  margin-top: 40px;
  margin-left: 80px;
  margin-right: 10px;
  height: 200px;
  width: 200px;
  background-color: black;
  box-shadow: 5px 5px 5px #888888; /* x y z color*/
}

#user1{
  display: flex;
  height: 200px; /* height width inherit*/
  width: 200px;
  background-image: url("webimages/user1.jpeg");
  background-size: cover;
}

#user1:hover .profile-name{
  visibility: visible;
}

#user2{
  display: flex;
  height: 200px;
  width: 200px;
  background-image: url("webimages/user3.jpg");
  background-size: cover;
}

#user2:hover .profile-name{
  visibility: visible;
}

#user3{
  display: flex;
  height: 200px;
  width: 200px;
  background-image: url("webimages/user4.jpg");
  background-size: cover;
}

#user3:hover .profile-name{
  visibility: visible;
}

#user4{
  display: flex;
  height: 200px;
  width: 200px;
  background-image: url("webimages/user5.jpg");
  background-size: cover;
}

#user4:hover .profile-name{
  visibility: visible;
}

.profile-name{
  box-shadow: 5px 5px 5px #888888;
  visibility: hidden;
  margin-top: 150px;
  height: 50px;
  width: inherit;
  background-color: white;
}

.profile-name-written{
  margin-left: 80px; /* rather use text align center*/
  font-family: cursive;
}
.sign-up-form{
  margin-top: 100px;
  height: 600px;
  width: 500px;
}
#signup{
    display: inline-block;
}
#login{
    display: none;
}
input{
  height: 40px;
  width: 200px;
  margin-right: 10px;
  margin-top: 10px;
  border-color: #bdc7d8;
  border-radius: 5px;
}

::-moz-placeholder{
  font-size: 18px;
  font-family: inherit;
}

#create-account{
  height: 50px;
  width: 250px;
  background: linear-gradient(#67ae55, #578843);
  background-color: #69a74e;
  box-shadow: inset 0 1px 1px #a4e388;
  border-color: #3b6e22 #3b6e22 #2c5115;
  border: 1px solid;
  border-radius: 5px;
  color: #fff;
  font-family: 'Freight Sans Bold', Helvetica, Arial, sans-serif !important;
  font-weight: bold;
  font-size: 20px;
  cursor: pointer;
  letter-spacing: 1px;
  text-shadow: 0 1px 2px rgba(0,0,0,.5);
}
#pageFooter {
    background-color: rgb(59, 89, 152);
    padding-top: 1.5em;
    overflow: hidden;
    height: 150px;
}

#pageFooter a {
    display: inline-block;
}

#pageFooter img {
    width: 30px;
    height: 30px;
}

#pageFooter div{
    margin-top: -20px;
    margin-left: 100px;
    margin-right: 30px;
    display: inline-block;
    text-align: center;
    height: 80px;
}

/*marquee {
    color: white;
}*/

#relatedtags{
  height: 70px;
  width: 500px;
}

#relatedtags ul li{
  margin-left: 8px;
  margin-right: 8px;
  font-size: 15px;
  display: inline-block;
}

#relatedtags ul li a{
  text-decoration: none;
  color: white;
}