* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  display: grid;
  place-items: center;
  font-family: "Noto Sans KR", "Malgun Gothic", sans-serif;
  background: linear-gradient(135deg, #fff6d8, #ffe7f3);
  padding: 20px;
}

.game-card {
  width: min(640px, 100%);
  background: #ffffff;
  border-radius: 20px;
  padding: 24px;
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.12);
}

h1 {
  margin: 0 0 12px;
  color: #1f2937;
}

.question {
  margin: 0 0 18px;
  line-height: 1.6;
  font-size: 1.05rem;
}

.quiz-form {
  display: grid;
  gap: 10px;
}

label {
  font-weight: 700;
}

input {
  font-size: 1rem;
  padding: 10px 12px;
  border-radius: 10px;
  border: 2px solid #d1d5db;
}

button {
  border: 0;
  border-radius: 10px;
  padding: 11px 14px;
  font-size: 1rem;
  font-weight: 700;
  color: white;
  background: #ef4444;
  cursor: pointer;
}

button:hover {
  background: #dc2626;
}

.feedback {
  min-height: 1.6em;
  margin: 14px 0 0;
  font-size: 1.1rem;
  font-weight: 700;
}

.feedback.success {
  color: #15803d;
}

.feedback.fail {
  color: #b91c1c;
}

.feedback-visual {
  min-height: 52px;
  margin-top: 8px;
  font-size: 2.2rem;
  opacity: 0;
  transform: scale(0.85);
  transition: opacity 0.2s ease, transform 0.2s ease;
}

.feedback-visual.show {
  opacity: 1;
  transform: scale(1);
}