html,
body {
  background-color: #fff;
  font-family: "Helvetica", "Arial", "Verdana", sans-serif;
  margin: 0;
  padding: 0;
}

.app-container {
  max-width: 100%;
  overflow: hidden;
}

.header {
  background-color: #369;
  padding: 10px 0;
}

.header > h1 {
  color: #fff;
  font-size: 24px;
  font-weight: 400;
  margin: 0;
  text-align: center;
}

.container {
  border-bottom: 1px solid #333;
  border-right: 1px solid #333;
  display: flex;
  flex-wrap: wrap;
  margin: 30px auto 0;
  width: 354px;
}

input {
  -moz-appearance: textfield;
  -webkit-appearance: none;
  appearance: none;
  border-color: #333;
  border-style: solid;
  border-width: 1px 0 0 1px;
  font-size: 28px;
  height: 58px;
  margin: 0;
  padding: 0;
  text-align: center;
  width: 58px;
}

input::-webkit-outer-spin-button,
input::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

.button {
  background-color: #369;
  border-radius: 3px;
  border: 1px solid #0005;
  color: #fff;
  cursor: pointer;
  line-height: 40px;
  margin: 15px auto;
  text-align: center;
  width: 354px;
}

.button:hover {
  background-color: #47a;
}

.button:active {
  background-color: #258;
}

.status-bar {
  background-color: #eee;
  border-radius: 4px;
  height: 10px;
  margin: 5px auto 60px;
  width: 354px;
}

.status-bar.thinking {
  background-color: #369;
}

.status-bar.complete {
  background-color: #0b0;
}

.status-bar.invalid {
  background-color: #911;
}