* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang HK", sans-serif;
  background: #f0f8ff;
  color: #222;
  padding: 10px;
  max-width: 420px;
  margin: 0 auto;
  min-height: 100vh;
}
header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
}
h1 { font-size: 1.6rem; }
.big-btn {
  background: #4a90e2;
  color: white;
  border: none;
  border-radius: 12px;
  padding: 16px 24px;
  font-size: 1.3rem;
  min-width: 80px;
  min-height: 56px;
  cursor: pointer;
  margin: 5px;
}
.big-btn:active { transform: scale(0.96); }
#poster {
  background: white;
  border-radius: 20px;
  padding: 20px;
  text-align: center;
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
  margin-bottom: 20px;
}
#bigNum {
  font-size: 6rem;
  font-weight: bold;
  color: #e74c3c;
  margin: 10px 0;
}
#items {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
  min-height: 100px;
}
.dot {
  width: 28px;
  height: 28px;
  background: #3498db;
  border-radius: 50%;
  border: 3px solid #2c3e50;
}
.controls { text-align: center; margin: 15px 0; }
#quiz { margin-top: 20px; text-align: center; }
#options { display: flex; flex-wrap: wrap; justify-content: center; gap: 10px; margin: 15px 0; }
#feedback { font-size: 1.4rem; font-weight: bold; min-height: 2rem; }