HTMLify

* {
  padding: 0;
  box-sizing: border-box;
  font-family: "sans";
}

@font-face {
  font-family: "sans";
  src: url(font/sans.ttf);
}

body {
  overflow: hidden;
  background: #19172e;
  font-size: 40px;
}

h1 {
  color: #fff;
  text-align: center;
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  padding-top: 10px;
  font-size: 2rem !important;
}

td {
  background-color: white;
  border-radius: 10px;
  opacity: 0.2;
  width: 50px;
  height: 50px;
  text-align: center;
  color: white;
}

.text {
  color: white;
  opacity: 1;
  background-color: transparent;
  border: none;
}

td:hover {
  cursor: pointer;
  opacity: 0.4;
}

.content {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  display: block;
}

table {
  width: 300px;
  height: 300px;
}

.table_overlay {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 300px;
  height: 300px;
}

.modal {
  display: none;
  position: fixed; 
  left: 0;
  top: 0;
  width: 100%;
  height: 100%; 
  z-index: 1;
}

.modal-content {
  background-color: #fefefe;
  margin: 10% auto;
  padding: 0px;
  border-radius: 10px;
  width: 300px;
  height: 200px;
  font-size: 17px;
  text-align: center;
  font-family: "Montserrat", sans-serif;
}

.modal-header {
  padding: 1px;
  border-radius: 10px 10px 0 0;
}

btn {
  position: relative;
  border-radius: 7px;
  padding: 10px;
  margin-top: 10px;
  color: white;
  background-color: grey;
  cursor: pointer;
}

btn:active {
  background-color: #1e8e3e;
}

footer {
  text-align: center;
  color: white;
  font-size: 1rem !important;
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  margin-bottom: 0;
  padding: 5px;
}

footer a:visited {
  color: inherit;
}