index.css

#result.hidden {
  display: none;
}

.hidden {
  display: none;
}

#result {
  margin-top: 2ch;
  text-align: right;
  display: block;
  text-align: center;
}

.down-arrow {
  font-size: 40px;
  padding-bottom: 20px;
}

#result button {
  font-size: 20px;
  text-transform: uppercase;
  width: 160px;
  height: 160px;
}

div {
  line-height: 30px;
}

.main {
  padding: 2ch;
  background: white;
  display: inline-block;
  border-radius: 10px;
}

.form {
  max-width: 50ch;
  background: rgba(0,0,0,0.01);
  border: 1px solid gray;
}

.form .title {
  padding-left: 1ch;
}

.form .field {
  padding-left: 1ch;
  padding-bottom: 0.5ch;
  padding-top: 0.5ch;
}

.field:nth-child(even) {
  background: rgba(0,0,0,0.05);
}

.field:nth-child(odd) {
  background: rgba(0,0,0,0.01);
}

.field .name {
  display: inline-block;
  width: 15ch;
}

.field .value {
  display: inline-block;
}

.form .footer {
  padding: 2ch;
  text-align: right;
}

.form .footer button {
  padding: 1ch;
}