body {
  font-family: sans-serif;
  background: #fdf6f0;
  text-align: center;
  overflow-x: hidden;
}

#calendar {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 10px;
  max-width: 800px;
  margin: 20px auto;
}

.door {
  background: darkred;
  color: gold;
  font-weight: bold;
  font-size: 1.5em;
  text-align: center;
  padding: 20px;
  border-radius: 8px;
  cursor: pointer;
  transition: transform 0.2s, background 0.2s;
}

.door.openable:hover {
  background: crimson;
  transform: scale(1.05);
}

.door.locked {
  background: #555;
  color: #aaa;
  cursor: not-allowed;
}

@media (max-width: 600px) {
  #calendar {
    grid-template-columns: repeat(3, 1fr);
  }
  .door {
    font-size: 1.2em;
    padding: 15px;
  }
}

/* Modal */
.modal {
  display: none;
  position: fixed;
  z-index: 1000;
  left: 0; top: 0;
  width: 100%; height: 100%;
  background: rgba(0,0,0,0.6);
}
.modal-content {
  background: #fff;
  margin: 10% auto;
  padding: 20px;
  border-radius: 8px;
  width: 80%;
  max-width: 500px;
}
.modal-content img {
  max-width: 100%;
  margin-bottom: 10px;
}
.close {
  float: right;
  font-size: 24px;
  cursor: pointer;
}
.actions a {
  display: block;
  margin: 5px 0;
  color: #0066cc;
  text-decoration: none;
}

/* Schneeflocken */
.snowflake {
  position: fixed;
  top: -10px;
  color: white;
  font-size: 1em;
  animation: fall linear infinite;
  pointer-events: none;
}
@keyframes fall {
  to { transform: translateY(100vh); }
}
@keyframes shake {
  10% { transform: translateX(-2px); }
  20% { transform: translateX(2px); }
  30% { transform: translateX(-2px); }
  40% { transform: translateX(2px); }
  50% { transform: translateX(-2px); }
  60% { transform: translateX(0); }
}