stylesheet.css

@font-face {
  font-family: "bahnschrift_300";
  src: url("bahnschrift.ttf") format("truetype"),
       url("bahnschrift.woff") format("woff");
  font-weight: 300;
  font-display: swap;
}

*:focus {
  outline: none;
}

body {
  font-family: bahnschrift_300;
  background-color: #e2e2e2;
  margin: 0;
}

#navbar ul {
  list-style-type: none;
  margin: 0;
  padding: 0;
  overflow: auto;
  height: 47px;
  background-color: #4d4d4d;
  position: fixed;
  top: 0;
  width: 100%;
  font-size: 16px;
}

#navbar li {
  float: left;
}

#navbar li a {
  display: block;
  color: white;
  text-align: center;
  padding: 14px 16px;
  text-decoration: none;
}

#navbar li a:hover:not(.active) {
  background-color: #000;
}

.active {
  background-color: red;
}

.title {
  font-size: 33px;
  text-align: left;
  text-decoration: underline;
}

.title2 {
  padding: 16px;
  font-size: 33px;
  text-align: left;
  text-decoration: underline;
}

.heading {
  padding-left: 16px;
  font-size: 18px;
  text-align: left;
  text-decoration: underline;
  left: 10px;
}

.paragraph {
  padding: 16px;
  font-size: 20px;
  text-align: left;
  line-height: 1.2;
}

.span1 {
  color: red;
}

.span2 {
  color: red;
  text-decoration: underline red;
}

.span3 {
  padding-left: 43vw;
}

p a {
  color: red;
  text-decoration: underline red;
}

.button {
  background-color: #4CAF50;
  border: none;
  color: white;
  padding: 16px 32px;
  text-align: center;
  text-decoration: none;
  display: inline-block;
  font-size: 16px;
  margin: 16px;
  transition-duration: 0.4s;
  cursor: pointer;
}

.button1 {
  background-color: #ffffff;
  color: black;
  border: 2px solid #4d4d4d;
}

.button1:hover {
  background-color: #4d4d4d;
  color: white;
}

.smallbutton {
  font-family: bahnschrift_300;
  font-size: 16px;
  border-radius: 4px;
}

table, th, td {
  padding: 16px;
  text-align: center;
}

th, td {
  border: 2px solid #4d4d4d;
}

table tr:nth-child(even) {
  background-color: #9d9d9d;
}

table tr:nth-child(odd) {
  background-color: #ffffff;
}

table th {
  color: white;
  background-color: #4d4d4d;
}

.blank {
	border: none;
	background-color: #e2e2e2;
}

.overflow {
	border: 2px solid #4d4d4d;
	border-radius: 50%;
}

.binarydenary {
  background-image: url('converticon.png');
  background-position: 10px 12px;
  background-repeat: no-repeat;
  width: 100%;
  font-size: 16px;
  padding: 12px 20px 12px 40px;
  border: 1px solid #ddd;
  margin-bottom: 12px;
}

.denarybinary {
  background-image: url('converticon.png');
  background-position: 10px 12px;
  background-repeat: no-repeat;
  width: 100%;
  font-size: 16px;
  padding: 12px 20px 12px 40px;
  border: 1px solid #ddd;
  margin-bottom: 12px;
}

.output {
  width: 100%;
  font-size: 16px;
  padding: 12px 20px 12px 40px;
  border: 1px solid #ddd;
  margin-bottom: 12px;
}

.backbutton {
  border: none;
  color: #4d4d4d;
  padding-left: 16px;
  text-align: left;
  text-decoration: none;
  display: inline-block;
  font-size: 16px;
  margin: 16px;
  cursor: pointer;
}

.logincontainer {
  display: flex;
  justify-content: center;
  align-items: center;
  margin-top: 20vh;
  margin-left: 30vw;
  margin-right: 30vw;
  height: 30vh;
  background-color: #e2e2e2;
}

.loginfield {
  width: 15vw;
  padding: 6px 10px 6px 10px;
  border: 1px solid #d0d0d0;
  border-radius: 2px;
  margin: 3px;
  margin-bottom: 6px;
}

.container {
  position: relative;
  width: 50%;
  margin: 16px;
  border: 2px solid #4d4d4d;
  border-radius: 5px;
}

.container img {
  width: 100%;
  height: auto;
  filter: blur(2px);
}

.container .imgbutton {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background-color: transparent;
  color: #000000;
  font-size: 16px;
  padding: 12px 24px;
  border: none;
  cursor: pointer;
  border-radius: 5px;
}

.container .imgbutton:hover {
  background-color: #4d4d4d;
  color: #ffffff;
}

.column {
  float: left;
  width: 33.33%;
}

.row:after {
  content: "";
  display: table;
  clear: both;
}

#searchbar {
  background-image: url('searchicon.png');
  background-position: 10px 12px;
  background-repeat: no-repeat;
  width: 100%;
  font-size: 16px;
  padding: 12px 20px 12px 40px;
  border: 1px solid #d0d0d0;
  border-radius: 2px;
  margin-bottom: 12px;
}

#topiclist {
  list-style-type: none;
  padding: 16px;
  margin: 0;
}

#topiclist li a {
  border: 1px solid #ddd;
  margin-top: -1px;
  background-color: #f6f6f6;
  padding: 16px;
  text-decoration: none;
  font-size: 18px;
  color: black;
  display: block;
}

#topiclist li a:hover:not(.header) {
  background-color: #eee;
}