HTMLify

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

*:focus {
	outline: 0;
}

body{
	background-color: #fff;
	background-size:  8px 8px, 8px 8px;
	background-position: center, center;
	background-image: linear-gradient(#ebf4f9 1px, transparent 1px),linear-gradient(90deg, #ebf4f9 1px, transparent 1px);
}

html {
	-webkit-tap-highlight-color: rgba(0, 0, 0, 0);
}

.container {
  margin: 50px auto;
  max-width: 90%;
  width: 600px;
}

.ctn-cyphers {
  align-items: center;
  background-color: #000000;
  border-radius: 10px 10px 0 0;
  box-shadow: 0 0 10px #cdcdcd inset;
  display: flex;
  justify-content: center;
  width: 100%;
}

[class^="cypher-"] {
  background-color: #080808;
  border-radius: 5px;
  box-shadow: 0 0 0 5px #cdcdcd inset;
  cursor: pointer;
  font: bold 100px sans-serif;
  margin: 2.5%;
  padding: 15% 0;
  text-align: center;
  width: 100%;
}

[class^="cypher-"] span {
  -webkit-background-clip: text;
  background-color: #cdcdcd;
  color: rgba(0, 0, 0, 0);
}

[class^="cypher-"] span.active {
  background-image: linear-gradient(
                      to bottom,
                    #e73e2b 40%,
                    #fbee17 45%,
                    #91c03a 50%,
                    #019971 55%,
                    #0197cf 60%,
                    #834288 65%
                    );
}

.result {
  background-color: #080808;
  border-radius: 0 0 10px 10px;
  padding: 15px 0;
  text-align: center;
}

.result p {
  color: #cdcdcd;
  font: normal 20px sans-serif;
  text-shadow: 0 0 5px #000000;
}

.result p .content-result.good {
  color: #00ff00;
}

.result p .content-result.bad {
  color: #ff0000;
}

.result p .round {
  font-weight: bold;
}

.reset {
  display: none;
  text-align: center;
}

.reset button {
  background-color: rgba(0, 0, 0, 0);
  border-style: none;
  box-shadow: 0 0 0 3px #080808;
  color: #080808;
  cursor: pointer;
  font: bold 20px sans-serif;
  margin-top: 30px;
  padding: 0.5em 2em;
}

@media screen and (max-width: 500px) {
	.container {
  	margin: 5px auto;
		max-width: 80%;
	}
	
  .ctn-cyphers {
    flex-direction: column;
  }

  [class^="cypher-"] {
    font-size: 50px;
    margin: 5%;
    padding: 2.5% 0;
    width: 80%;
  }
}