:root{color-scheme:light;--bg: #f8fafc;--panel: #ffffff;--border: #e2e8f0;--text: #1e293b;--muted: #64748b;--accent: #4f46e5;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text)}#app{display:flex;flex-direction:column;min-height:100vh}header.topbar{display:flex;align-items:center;gap:24px;padding:12px 24px;background:var(--panel);border-bottom:1px solid var(--border)}header.topbar h1{font-size:18px;margin:0 auto 0 0}nav.tabs{display:flex;gap:4px}nav.tabs button{border:none;background:transparent;padding:8px 14px;border-radius:6px;cursor:pointer;color:var(--muted);font-size:14px}nav.tabs button.active{background:var(--accent);color:#fff}main{flex:1;padding:24px;max-width:1200px;width:100%;margin:0 auto}.panel-section{background:var(--panel);border:1px solid var(--border);border-radius:8px;padding:16px;margin-bottom:16px}.panel-section h2{margin-top:0;font-size:16px}table{width:100%;border-collapse:collapse;font-size:14px}th,td{text-align:left;padding:8px;border-bottom:1px solid var(--border)}input,select{padding:6px 8px;border:1px solid var(--border);border-radius:4px;font-size:14px}button.btn{background:var(--accent);color:#fff;border:none;padding:6px 12px;border-radius:4px;cursor:pointer;font-size:14px}button.btn.secondary{background:transparent;color:var(--accent);border:1px solid var(--accent)}button.btn.danger{background:#ef4444}.form-row{display:flex;gap:8px;flex-wrap:wrap;align-items:center;margin-bottom:12px}.gantt-row{display:flex;align-items:center;gap:8px;height:32px}.gantt-track{position:relative;flex:1;height:20px;background:#f1f5f9;border-radius:4px}.gantt-bar{position:absolute;top:0;height:100%;border-radius:4px;color:#fff;font-size:11px;display:flex;align-items:center;padding-left:6px;white-space:nowrap;overflow:hidden}.gantt-label{width:220px;font-size:13px;flex-shrink:0}.timeline-track{position:relative;flex:1;height:20px}.timeline-week{position:absolute;top:0;height:100%;box-sizing:border-box;border-left:1px solid var(--border);padding-left:4px;font-size:11px;font-weight:600;color:var(--muted);white-space:nowrap;overflow:hidden}.timeline-day{position:absolute;top:0;height:100%;box-sizing:border-box;border-left:1px solid #f1f5f9;font-size:10px;line-height:20px;text-align:center;color:var(--muted)}.timeline-day.weekend{background:#f8fafc;color:#cbd5e1}.heatmap-table td,.heatmap-table th{text-align:center;min-width:56px}.heatmap-cell{border-radius:4px;padding:4px;font-size:12px}.tag{display:inline-block;padding:2px 8px;border-radius:999px;font-size:12px;background:#eef2ff;color:var(--accent);margin-right:4px}.muted{color:var(--muted);font-size:13px}