* {
  box-sizing: border-box;
  font-family: system-ui, sans-serif;
}

body {
  margin: 0;
  background: #fff;
}

#app {
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
}

#card {
  width: 100%;
  max-width: 420px;
  padding: 24px;
  text-align: center;
}

#verb-base {
  font-size: 32px;
  font-weight: bold;
  margin-bottom: 12px;
}

input {
  width: 100%;
  padding: 12px;
  margin: 6px 0;
  font-size: 16px;
}

input.error {
  border: 2px solid red;
}

button {
  width: 100%;
  padding: 12px;
  margin-top: 8px;
  font-size: 16px;
  cursor: pointer;
}

#feedback {
  margin-bottom: 12px;
  font-weight: bold;
  color: green;
}

#feedback .wrong {
  color: red;
}

.hidden {
  display: none;
}

#summary {
  margin-top: 16px;
  font-size: 18px;
  font-weight: bold;
}