dark.css

* {
  box-sizing: border-box;
  padding: 0;
  margin: 0;
  font-family: "Open Sans", sans-serif;
}

body {
/*background-color: rgb(20, 19, 19, 0);*/
  transition: 0.8s;
  -webkit-transition: 0.8s;
  -moz-transition: 0.8s;
  -ms-transition: 0.8s;
  -o-transition: 0.8s;
}
.wrapper {
  height: 100vh;
  width: 100%;
  display: flex;
  justify-content: center;
  flex-direction: column;
  align-items: center;
}

.container {
  width: 393px;
}

@media {
  width: device-width;
  zoom: 1;
  min-zoom: 0.5;
  max-zoom: 3;
  user-zoom: fixed;
}

.result {
  width: 59.1%;
}

input {
  padding: 8px;
  color: rgb(255, 255, 255);
  font-size: 1.4em;
  cursor: pointer;
  width: 90px;
  background-color: rgb(47, 51, 50);
  border: none;
  outline: none;
  border-radius: 4px;
  height: 90px;
  margin-left: 2px
}

.first-row,
.second-row,
.third-row,
.fourth-row {
  margin-bottom: 5px;
}

input[type="text"] {
  background-color: rgb(47, 51, 50);
  width: 282px;
}

input[type="button"]:hover {
  background-color: rgb(160, 160, 160);
  color: #fff;
}

.clear {
  color: #fff;
  background-color: rgb(255, 42, 42);
}

button {
  border: none;
  background-color: rgb(39, 36, 36);
  padding: 8px;
  color: white;
  margin: 2px;
  cursor: pointer;
  outline: none;
  border-radius: 4px;
  font-size: 0.8em;
  font-weight: 200;
}

a {
  text-decoration: none;
  color: #fff;
  border: none;
  background-color: rgb(39, 36, 36);
  padding: 8px;
  color: white;
  margin: 2px;
  border-radius: 4px;
  font-size: 0.8em;
  font-weight: 200;
}

.bottom-buttons {
  display: flex;
  margin-left: -2.3px;
}

.fab {
  font-size: 1.1em;
}

::-webkit-scrollbar {
  display: none;
}