:root {
  --bg-a: #fff4ba;
  --bg-b: #b8f2ff;
  --card: #ffffffee;
  --pink: #ff6ba8;
  --mint: #30d0b7;
  --orange: #ff9f43;
  --blue: #4d7cff;
  --text: #25314a;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Gaegu", cursive;
  color: var(--text);
  background:
    radial-gradient(circle at 20% 20%, #ffd6ef 0, transparent 35%),
    radial-gradient(circle at 80% 15%, #d5ffd6 0, transparent 30%),
    linear-gradient(135deg, var(--bg-a), var(--bg-b));
  min-height: 100vh;
}

.app {
  max-width: 980px;
  margin: 0 auto;
  padding: 20px 14px 40px;
}

.hero {
  text-align: center;
  margin-bottom: 14px;
}

.hero h1 {
  margin: 0;
  font-size: clamp(2rem, 7vw, 3.4rem);
  color: var(--pink);
  text-shadow: 2px 2px 0 #fff;
}

.hero p {
  margin: 8px 0 0;
  font-size: 1.25rem;
}

.card {
  background: var(--card);
  border: 4px solid #fff;
  border-radius: 18px;
  box-shadow: 0 8px 0 #e0e9ff;
  padding: 16px;
  margin-top: 14px;
}

h2 {
  margin: 0 0 8px;
  font-size: 1.6rem;
}

.topic-grid,
.mode-grid,
.question-bank,
.answer-buttons {
  display: grid;
  gap: 10px;
}

.topic-grid {
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
}

.mode-grid {
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
}

.question-bank {
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  margin: 12px 0;
}

button,
select {
  font-family: inherit;
  font-size: 1.1rem;
  border-radius: 12px;
  border: 3px solid #fff;
  padding: 10px 12px;
}

button {
  cursor: pointer;
  color: #fff;
  background: var(--blue);
  box-shadow: 0 4px 0 #3453af;
  transition: transform 0.06s ease;
}

button:hover:enabled {
  transform: translateY(-2px);
}

button:active:enabled {
  transform: translateY(1px);
}

button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.topic-btn {
  background: var(--orange);
  box-shadow: 0 4px 0 #cf7c28;
}

.topic-btn.active {
  background: var(--mint);
  box-shadow: 0 4px 0 #219987;
}

.mode-btn {
  background: var(--pink);
  box-shadow: 0 4px 0 #c84d7e;
  font-size: 1.25rem;
}

.secondary {
  margin-top: 10px;
  background: #9d6cff;
  box-shadow: 0 4px 0 #6a46b2;
}

small {
  font-size: 0.95rem;
}

.selected-topic,
.counter,
.hint,
.ai-question {
  font-size: 1.2rem;
  font-weight: 700;
}

.guess-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  margin: 8px 0;
}

.answer-buttons {
  grid-template-columns: repeat(2, minmax(100px, 1fr));
  max-width: 260px;
  margin: 10px 0;
}

#answer-yes {
  background: var(--mint);
  box-shadow: 0 4px 0 #219987;
}

#answer-no {
  background: var(--orange);
  box-shadow: 0 4px 0 #cf7c28;
}

.log-card ul {
  list-style: "⭐ ";
  padding-left: 24px;
  margin: 0;
}

.hidden {
  display: none;
}

@media (max-width: 640px) {
  .card {
    padding: 14px;
  }

  h2 {
    font-size: 1.35rem;
  }

  .hero p,
  .selected-topic,
  .counter,
  .hint,
  .ai-question {
    font-size: 1.08rem;
  }
}