body {
  background-color: #f9f9f9;
  font-family: 'Segoe UI', sans-serif;
  text-align: center;
  margin: 0;
  padding: 40px 20px;
  color: #333;
}

h1 {
  font-size: 28px;
  margin-bottom: 10px;
}

.card-grid {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
  margin: 40px auto;
}

.card {
  display: flex;
  justify-content: center;
  align-items: center;
  width: 200px;
  height: 120px;
  background-color: white;
  border: 2px solid #333;
  border-radius: 10px;
  font-size: 18px;
  font-weight: bold;
  text-decoration: none;
  color: #333;
  box-shadow: 2px 2px 10px rgba(0,0,0,0.1);
  transition: transform 0.2s, background-color 0.2s;
}

.card:hover {
  background-color: #f0f0f0; /* ??????????? */
  transform: translateY(-4px);
}

.card.disabled {
  background-color: #ccc;
  color: #777;
  border-color: #aaa;
  pointer-events: none;
  box-shadow: none;
}