body { font-family: 'Malgun Gothic', sans-serif; margin: 0; padding: 20px; background-color: #f4f7f6; }
.container { max-width: 800px; margin: 0 auto; background: white; padding: 30px; border-radius: 10px; box-shadow: 0 4px 8px rgba(0,0,0,0.1); }
h1 { color: #2c3e50; border-bottom: 2px solid #3498db; padding-bottom: 10px; }
h2 { color: #34495e; margin-top: 30px; }
.divider { border: 0; height: 1px; background: #eee; margin: 40px 0; }

.material-list { list-style: none; padding: 0; }
.material-item { padding: 15px; border-bottom: 1px solid #eee; display: flex; justify-content: space-between; align-items: center; }
.material-item span { font-size: 16px; color: #333; }
.material-item a { background: #27ae60; color: white; padding: 8px 15px; text-decoration: none; border-radius: 5px; font-size: 14px; font-weight: bold; }
.material-item a:hover { background: #219150; }

.form-row { display: flex; gap: 10px; }
.form-group { margin-bottom: 15px; flex: 1; }
.form-group label { display: block; margin-bottom: 5px; font-weight: bold; color: #555; }
.form-group input, .form-group textarea { width: 100%; padding: 10px; box-sizing: border-box; border: 1px solid #ccc; border-radius: 5px; }
.btn { background: #3498db; color: white; border: none; padding: 12px 20px; cursor: pointer; border-radius: 5px; font-size: 16px; font-weight: bold; width: 100%; }
.btn:hover { background: #2980b9; }

.comment-item { background: #f9f9f9; padding: 15px; margin-bottom: 10px; border-radius: 5px; border-left: 4px solid #3498db; }
.comment-meta { font-size: 13px; color: #555; margin-bottom: 8px; }
.comment-meta strong { color: #2c3e50; font-size: 15px; }