* { margin: 0; padding: 0; box-sizing: border-box; }
.container { max-width: 800px; margin: 20px auto; padding: 0 20px; }
.post-form { margin-bottom: 30px; }
textarea { width: 100%; height: 100px; padding: 10px; border: 1px solid #ddd; border-radius: 4px; resize: none; }
button { margin-top: 10px; padding: 8px 20px; background: #0066cc; color: #fff; border: none; border-radius: 4px; cursor: pointer; }
.posts-list { gap: 15px; display: flex; flex-direction: column; }
.post-item { padding: 15px; border: 1px solid #eee; border-radius: 4px; background: #f9f9f9; }
.post-time { font-size: 12px; color: #999; margin-top: 5px; }