html {
  font-size: 10px;
}

body {
  padding: 0;
  margin: 0;
  min-height: 100vh;
  position: relative;
}

.button-back {
  position: absolute;
  right: 40px;
  bottom: 40px;
  font-size: 1.4rem;
  padding: 7px 20px;
  text-transform: uppercase;
}

.card {
  width: 70%;
  position: absolute;
  top: 50%;
  left: 50%;
  padding: 1rem;
  transform: translateX(-50%) translateY(-50%);
}

.show-group {
  margin: 0 auto;
  text-align: center;
}

.value {
  font-size: 3rem;
  margin: 7px 0;
}
.value span {
  font-weight: 700;
}

.header {
  text-align: center;
}

.description {
  font-size: 1.8rem;
}

.note {
  font-size: 1.5rem;
}

.string-input {
  font-size: 1.8rem;
  width: 90% !important;
  margin: 10px auto !important;
}

.input-group {
  display: flex;
  flex-direction: column;
}

.button {
  display: block;
  margin: 0 auto;
  font-size: 1.8rem;
  padding: 7px 20px;
  text-transform: uppercase;
}

.error {
  text-align: center;
  font-size: 1.8rem;
}

.result-group {
  width: 70%;
  margin: 10px auto 0 auto;
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 2rem;
}

.result {
  padding: 5px;
  border-radius: 2px;
  color: #eee;
  background-color: #343a40;
  transition: background-color 0.4s ease-in;
}

.true {
  background-color: #198754;
  color: #eee;
  transition: all 0.4s ease-in;
}

.false {
  background-color: #dc3545;
  color: #eee;
  transition: all 0.4s ease-in;
}