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16px;font-size:13px;font-weight:500;transition:color .15s,border-color .15s}.admin-tab:hover{color:var(--text-primary)}.admin-tab--active{color:var(--columbia);border-bottom-color:var(--columbia)}.actions-cell{align-items:center;gap:6px;display:flex}.action-btn{border-radius:var(--radius);padding:5px 10px;font-size:12px;font-weight:600}.action-btn-chat{color:var(--columbia);background:#7ba3c726;border:1px solid #7ba3c74d}.action-btn-chat:hover{background:#7ba3c740}.action-btn-files{color:var(--light-blue,#a8c8e8);background:#a8c8e81f;border:1px solid #a8c8e840}.action-btn-files:hover{background:#a8c8e838}.drilldown-view{flex-direction:column;height:100%;min-height:0;display:flex}.drilldown-header{flex-shrink:0;align-items:center;gap:12px;margin-bottom:16px;display:flex}.back-btn{background:var(--glass-bg-medium);color:var(--columbia);border:1px solid var(--glass-border);white-space:nowrap;padding:5px 12px;font-size:12px;font-weight:600}.back-btn:hover{background:var(--glass-bg-light)}.drilldown-title{font-family:var(--font-brand);letter-spacing:.5px;font-size:16px}.drilldown-student{color:var(--white);font-weight:700}.drilldown-sep{color:var(--gray-700);margin:0 2px}.drilldown-section{color:var(--columbia);font-weight:500}.chat-history-log{flex-direction:column;flex:1;gap:8px;padding-right:4px;display:flex;overflow-y:auto}.session-divider{text-align:center;color:var(--gray-700);border-bottom:1px solid var(--glass-border-subtle);letter-spacing:.5px;margin:8px 0 4px;padding-bottom:6px;font-size:11px}.chat-history-msg{background:var(--glass-bg);border:1px solid var(--glass-border-subtle);border-radius:var(--radius-lg);padding:10px 14px}.chat-history-msg--user{border-left:3px solid var(--columbia);margin-left:0;margin-right:60px}.chat-history-msg--assistant{border-left:3px solid #34d05880;margin-left:60px;margin-right:0}.chat-history-meta{align-items:baseline;gap:10px;margin-bottom:6px;display:flex}.chat-history-role{color:var(--columbia);text-transform:uppercase;letter-spacing:.5px;font-size:12px;font-weight:700}.chat-history-msg--assistant .chat-history-role{color:var(--success)}.chat-history-ts{color:var(--gray-700);font-size:11px}.chat-history-content{color:var(--text-primary);white-space:pre-wrap;word-break:break-word;font-size:13px;line-height:1.5}.drilldown-view--files{overflow:hidden}.files-layout{border:1px solid var(--glass-border);border-radius:var(--radius-lg);background:var(--glass-bg);min-height:0;-webkit-backdrop-filter:var(--glass-blur);flex:1;gap:0;display:flex;overflow:hidden}.files-list{border-right:1px solid var(--glass-border);flex-shrink:0;width:180px;padding:8px 0;overflow-y:auto}.file-list-item{cursor:pointer;text-align:left;width:100%;color:var(--text-primary);background:0 0;border:none;border-radius:0;justify-content:space-between;align-items:center;padding:8px 12px;font-size:13px;transition:background .1s;display:flex}.file-list-item:hover{background:#7ba3c714}.file-list-item--active{color:var(--columbia);background:#7ba3c726}.file-list-name{text-overflow:ellipsis;white-space:nowrap;font-family:JetBrains Mono,ui-monospace,monospace;font-size:12px;overflow:hidden}.file-list-size{color:var(--gray-700);flex-shrink:0;margin-left:6px;font-size:10px}.file-editor{flex-direction:column;flex:1;min-width:0;display:flex}.file-editor-toolbar{border-bottom:1px solid var(--glass-border);background:#141e3066;flex-shrink:0;justify-content:space-between;align-items:center;padding:8px 14px;display:flex}.file-editor-name{color:var(--columbia);font-family:JetBrains Mono,ui-monospace,monospace;font-size:13px}.file-editor-actions{align-items:center;gap:10px;display:flex}.save-msg{color:var(--success);font-size:12px}.save-btn{background:var(--columbia);color:var(--navy-dark);padding:5px 14px;font-size:12px;font-weight:600}.save-btn:hover:not(:disabled){background:var(--columbia-light)}.file-editor-textarea{resize:none;color:var(--text-primary);tab-size:4;background:0 0;border:none;outline:none;flex:1;padding:14px;font-family:JetBrains Mono,ui-monospace,monospace;font-size:13px;line-height:1.6}.activity-view{flex-direction:column;gap:16px;height:100%;min-height:0;display:flex}.activity-filters{flex-shrink:0;align-items:center;gap:10px;display:flex}.admin-select{background:var(--glass-bg-medium);color:var(--text-primary);border:1px solid var(--glass-border);border-radius:var(--radius);cursor:pointer;padding:6px 10px;font-size:13px}.admin-select:focus{border-color:var(--columbia);outline:none}.activity-count{color:var(--gray-700);margin-left:4px;font-size:12px}.activity-ts{white-space:nowrap;color:var(--gray-700);font-size:12px}.activity-badge{letter-spacing:.5px;text-transform:uppercase;border-radius:10px;padding:2px 7px;font-size:10px;font-weight:700;display:inline-block}.activity-badge--chat,.activity-badge--user{color:var(--columbia);background:#7ba3c726;border:1px solid #7ba3c74d}.activity-badge--assistant{color:var(--success);background:#34d0581a;border:1px solid #34d05840}.activity-badge--build{color:var(--warning);background:#f59e0b1f;border:1px solid #f59e0b4d}.activity-detail{max-width:600px;font-size:13px}.activity-user-msg{color:var(--text-primary);margin-bottom:6px;font-weight:500}.activity-assistant-response{color:var(--text-secondary,#9ca3af);border-left:2px solid #34d0584d;padding-left:8px;padding-right:24px;font-size:12px;position:relative}.activity-assistant-response .expand-btn{position:absolute;top:0;right:0}.activity-detail-expanded{white-space:pre-wrap;word-break:break-word;max-height:280px;padding-right:4px;display:block;overflow-y:auto}.expand-btn{color:var(--columbia);cursor:pointer;background:0 0;border:none;flex-shrink:0;padding:0 4px;font-size:10px;line-height:1}.expand-btn:hover{color:var(--columbia-light)}.activity-row-user td{background:#7ba3c70a}.admin-empty{color:var(--gray-700);text-align:center;padding:40px 24px;font-size:14px}.app-loading{background:var(--navy-deeper);justify-content:center;align-items:center;height:100%;display:flex}.spinner{border:3px solid #7ba3c74d;border-top-color:var(--columbia);border-radius:50%;width:40px;height:40px;animation:.8s linear infinite spin}@keyframes spin{to{transform:rotate(360deg)}}