/* 教室管理页面样式 */
.classroom-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 16px; padding: 16px; }
.classroom-card { background: var(--card-bg, #fff); border-radius: 8px; padding: 16px; box-shadow: 0 1px 3px rgba(0,0,0,0.1); border-left: 4px solid #F18D24; }
.classroom-card.inactive { border-left-color: #999; opacity: 0.6; }
.classroom-name { font-size: 16px; font-weight: 600; margin-bottom: 8px; }
.classroom-info { font-size: 13px; color: #666; line-height: 1.8; }
.classroom-info span { margin-right: 12px; }
.classroom-usage { margin-top: 12px; height: 6px; background: #eee; border-radius: 3px; overflow: hidden; }
.classroom-usage-bar { height: 100%; background: #F18D24; border-radius: 3px; transition: width 0.3s; }
.classroom-actions { margin-top: 12px; display: flex; gap: 8px; }
.classroom-modal .form-group { margin-bottom: 12px; }
.classroom-modal label { display: block; font-size: 13px; color: #555; margin-bottom: 4px; }
.classroom-modal input, .classroom-modal select { width: 100%; padding: 8px; border: 1px solid #ddd; border-radius: 4px; }
.toolbar { display: flex; justify-content: space-between; align-items: center; padding: 12px 16px; border-bottom: 1px solid #eee; }
.toolbar-left { display: flex; gap: 8px; align-items: center; }
.btn-primary { background: #F18D24; color: #fff; border: none; padding: 8px 16px; border-radius: 4px; cursor: pointer; }
.btn-primary:hover { background: #d9771a; }
.btn-secondary { background: #f0f0f0; color: #333; border: 1px solid #ddd; padding: 8px 16px; border-radius: 4px; cursor: pointer; }
.empty-state { text-align: center; padding: 60px 20px; color: #999; }
.empty-state h3 { font-size: 18px; margin-bottom: 8px; }
.device-tag { display: inline-block; background: #FFF3E0; color: #F18D24; padding: 2px 8px; border-radius: 12px; font-size: 12px; margin: 2px; }