style.css

body {
  background: #666;
  background-color: black;
  font-family: Arial, Helvetica, sans-serif;
}

#header {
  font-size: 3.95vw;
  text-align: right;
  position: absolute;
  top: 0;
  right: 0;
  z-index: 2;
}

#header a {
  padding: 1vw;
  color: #999999;
  text-decoration: none;
}

.overlay {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;
  background: rgba(0, 0, 0, 0.7);
  transition: opacity 500ms;
  visibility: hidden;
  opacity: 0;
  z-index: 5;
}

.overlay:target {
  visibility: visible;
  opacity: 1;
}

.popup {
  margin: 70px auto;
  padding: 20px;
  background: #fff;
  border-radius: 5px;
  width: 50%;
  position: relative;
  z-index: 15;
  transition: all 5s ease-in-out;
}

.popup h2 {
  margin-top: 0;
  color: #333;
  font-family: Arial, Helvetica, sans-serif;
  font-weight: 900;
}

.popup .close {
  position: absolute;
  top: 20px;
  right: 30px;
  transition: all 200ms;
  font-size: 30px;
  font-weight: bold;
  text-decoration: none;
  color: #333;
  font-family: Arial, Helvetica, sans-serif;
}

.popup .close:hover {
  color: red;
}

.popup .content {
  font-size: 16px;
  font-family: Arial, Helvetica, sans-serif;
  max-height: 30%;
  overflow: auto;
}

/* Will work harder to stop the date from moving alter */
/* font-family: "Consolas", "Droid Sans Mono", "Courier New", Courier,
            monospace; */

#time {
  text-align: center;
}

#minute,
#second {
  font-family: "Oswald", Impact, sans-serif;
  font-weight: bold;
  letter-spacing: -1vw;
}

.min5 {
  color: lightgray;
  -webkit-text-stroke-color: grey;
  -webkit-text-stroke-width: 0.3em;
}

.min1 {
  color: red;
  -webkit-text-stroke-color: darkred;
  -webkit-text-stroke-width: 0.3em;
}

@media screen and (orientation: portrait) {
  #minute,
  #second {
    display: block;
    font-size: 50vh;
    line-height: 43vh;
  }
}

@media screen and (orientation: landscape) {
  #minute::after {
    content: ":";
  }

  #minute,
  #second {
    display: inline;
    font-size: 35vw;
    line-height: 30vw;
  }
}