html {
  margin: 0;
  min-height: 100%;
  background-color: #2b2b2b;
  background: linear-gradient(180deg, #000, #000 50%, magenta);
  font-family: sans-serif;
}
body {
  overflow: hidden;
  padding: 0;
  margin: 0;
  text-align: center;
}
.logo {
  margin: 10px auto;
  width: 90%;
  max-width: 500px;
}

.wrapper {
  color: white;
  max-width: 500px;
  width: 90%;
  box-sizing: border-box;
  padding: 1em;
  margin: 0 auto;
  text-align: center;
  font-size: 0;
}

.start-game-title {
  text-transform: uppercase;
}

label {
  font-size: initial;
  text-align: left;
  display: block;
  margin-top: 20px;
  margin-bottom: 10px;
  box-sizing: border-box;
}
label:first-of-type {
  padding-right: 10px;
}
label:last-of-type {
  padding-left: 10px;
}

button,
input[type="text"] {
  padding: 1em;
  border: 0;
  font-size: 16px;
  box-sizing: border-box;
}
button {
  text-transform: uppercase;
  color: white;
  background-color: #0078a7;
}
button:hover {
  background-color: #1088b7;
  cursor: pointer;
}

.full-width {
  width: 100%;
}
.half-width {
  width: 50%;
  display: inline-block;
}

@media screen and (max-width: 1300px) {
  .hide-mobile {
    display: none;
  }
}