body {
  margin: 0 auto;
  max-width: 30em;
  font-family: "Helvetica", "Arial", sans-serif;
  line-height: 1.5;
  padding: 0em 1em;
  background-color: #333;
}

h1 {
  padding-top: 1em;
  color: white;
}

#container {
  border-radius: 20px;
  background-color: #1f1f1f;
  padding: 20px;
}

#input_container {
  padding-bottom: 10px;
}

label, span, p {
  color: white;
}

input {
  width: 100%;
  padding: 10px 15px;
  margin: 8px 0;
  display: inline-block;
  border: 1px solid #ccc;
  border-radius: 10px;
  box-sizing: border-box;
  font-size: 15px;
}

button {
  background-color: #37a563;
  width: 100%;
  color: white;
  padding: 14px 20px;
  margin: 8px 0;
  border: none;
  border-radius: 10px;
  cursor: pointer;
  font-size: 22px;
  font-weight:bold;
}

span {
  margin: auto;
  padding-top: 5px;
  display: table;
  font-size: 20px;
  text-align: center;
}