body {
  background: #eef2f3;
  font-family: "Segoe UI", sans-serif;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  margin: 0;
}

.game-container {
  text-align: center;
  background: #fff;
  padding: 30px;
  border-radius: 20px;
  box-shadow: 0 0 15px rgba(0,0,0,0.1);
  width: 650px;
}

h1 {
  color: #333;
  margin-bottom: 20px;
}

.cards {
  display: grid;
  grid-template-columns: repeat(4, 140px);
  gap: 15px;
  justify-content: center;
}

.card {
  position: relative;
  width: 140px;
  height: 140px;
  background: #fafafa;
  border-radius: 15px;
  border: 2px solid #ccc;
  overflow: visible;
  box-shadow: 0 4px 6px rgba(0,0,0,0.1);
  display: flex;
  justify-content: center;
  align-items: center;
}

.note {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: #ffeb99;
  border-radius: 15px;
  display: flex;
  justify-content: center;
  align-items: center;
  font-weight: bold;
  font-size: 20px;
  transition: transform 1s ease, opacity 1s ease;
  transform-origin: top;
  cursor: pointer;
  z-index: 2;
  box-shadow: 0 5px 8px rgba(0,0,0,0.15);
}

.note.fall {
  transform: translateY(160px) rotate(25deg);
  opacity: 0;
}

.text {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 90%;
  text-align: center;
  font-size: 14px;
  color: #333;
  line-height: 1.3em;
}