body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Helvetica Neue", Arial, sans-serif;
  background: #f5f5f5;
  color: #222;
}

.header {
  background: #4caf50;
  color: #fff;
  padding: 1.2rem;
  text-align: center;
}

.main {
  padding: 1.2rem;
  max-width: 600px;
  margin: 0 auto;
}

.date-list {
  margin-top: 1rem;
}

.date-item {
  display: block;
  background: #fff;
  border-radius: 10px;
  padding: 1rem;
  border: 1px solid #ddd;
  margin-bottom: 1rem;
  text-decoration: none;
  color: #222;
}

.date-item:hover {
  background: #f0f8f0;
}

.date-main {
  font-size: 1.2rem;
  font-weight: bold;
}

.date-sub {
  font-size: 0.9rem;
  color: #4caf50;
  margin-top: 0.3rem;
}

.disabled {
  opacity: 0.5;
  pointer-events: none;
}

.footer {
  text-align: center;
  padding: 1rem;
  font-size: 0.8rem;
  color: #666;
}