/* 通用样式 */
body {
  margin: 0;
  padding: 0;
  font-family: "PingFang SC", "Helvetica Neue", sans-serif;
  background: linear-gradient(to bottom, #fff1f5, #f9f9ff);
  color: #444;
  line-height: 1.6;
}

h1, h2, h3 {
  color: #d6336c;
  text-align: center;
  margin-bottom: 20px;
}

p {
  margin: 0 0 10px;
}

button {
  padding: 10px 15px;
  background: #f78da7;
  border: none;
  color: white;
  border-radius: 10px;
  font-size: 1em;
  cursor: pointer;
  transition: background 0.3s ease;
}

button:hover {
  background: #f45c9c;
}

input[type="text"], input[type="file"], textarea {
  padding: 10px;
  font-size: 1em;
  border: 1px solid #ddd;
  border-radius: 8px;
  width: 100%;
  box-sizing: border-box;
  margin-bottom: 12px;
}

/* 卡片通用样式 */
.card {
  background: white;
  border-radius: 20px;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.05);
  overflow: hidden;
  transition: transform 0.2s ease;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 24px rgba(0, 0, 0, 0.1);
}

/* 上传容器通用样式 */
.upload-box {
  max-width: 500px;
  margin: 0 auto;
  padding: 30px;
  background: #ffffffcc;
  border-radius: 20px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
}

/* 留言展示区域卡片容器 */
.gallery {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 20px;
  padding: 20px;
}

.message-card img {
  width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: 20px 20px 0 0;
}

.message-text {
  padding: 16px 18px;
  font-size: 1em;
  background: #ffeaf1;
  border-radius: 0 0 20px 20px;
  text-align: left;
}

.timestamp {
  font-size: 0.8em;
  color: #aaa;
  text-align: right;
  padding: 6px 18px 10px;
}
/* 留言卡片删除按钮样式美化 */
.card .delete-btn {
  margin-top: 12px;
  padding: 8px 16px;
  background: #f78da7;
  color: white;
  border: none;
  border-radius: 10px;
  font-size: 14px;
  cursor: pointer;
  transition: all 0.25s ease;
  width: 90%;
}

.card .delete-btn:hover {
  background: #f45c9c;
  transform: translateY(-1px);
  box-shadow: 0 4px 10px rgba(0,0,0,0.1);
}


/* 响应式设计：手机适配 */
@media (max-width: 768px) {
  .upload-box,
  .card {
    margin: 10px;
    width: 90%;
  }

  .gallery {
    flex-direction: column;
    align-items: center;
    padding: 10px;
  }

  input[type="text"],
  textarea,
  button {
    font-size: 1em;
  }

  h1 {
    font-size: 1.5em;
  }
}