:root{--bg: #f5f6f8;--panel: #ffffff;--border: #e2e5ea;--text: #1f2430;--muted: #6b7280;--accent: #2563eb;--accent-soft: #eff4ff;--green: #16a34a;--amber: #d97706;--red: #dc2626}*{box-sizing:border-box}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;background:var(--bg);color:var(--text)}a{color:var(--accent)}.app{display:flex;min-height:100vh}.sidebar{width:230px;background:var(--panel);border-right:1px solid var(--border);padding:18px 12px;position:sticky;top:0;height:100vh}.sidebar h1{font-size:15px;margin:0 0 4px 8px}.sidebar .sub{font-size:12px;color:var(--muted);margin:0 0 18px 8px}.nav button{display:block;width:100%;text-align:left;border:none;background:transparent;padding:9px 12px;border-radius:8px;font-size:14px;cursor:pointer;color:var(--text);margin-bottom:2px}.nav button.active{background:var(--accent-soft);color:var(--accent);font-weight:600}.nav button:hover{background:var(--accent-soft)}.main{flex:1;padding:24px 28px;max-width:1100px}.header-row{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px}h2{margin:0;font-size:20px}.panel{background:var(--panel);border:1px solid var(--border);border-radius:12px;padding:16px;margin-bottom:16px}button.btn{border:1px solid var(--accent);background:var(--accent);color:#fff;border-radius:8px;padding:8px 14px;font-size:13px;cursor:pointer}button.btn.secondary{background:#fff;color:var(--accent)}button.btn.ghost{background:#fff;color:var(--text);border-color:var(--border)}button.btn:disabled{opacity:.5;cursor:default}.item{border-bottom:1px solid var(--border);padding:12px 0}.item:last-child{border-bottom:none}.item .subject{font-weight:600;font-size:14px}.item .meta{font-size:12px;color:var(--muted);margin-top:2px}.item .preview{font-size:13px;color:#444;margin-top:6px}.tag{display:inline-block;font-size:11px;padding:2px 8px;border-radius:999px;background:var(--accent-soft);color:var(--accent)}.tag.green{background:#e7f7ec;color:var(--green)}.tag.amber{background:#fdf3e3;color:var(--amber)}.tag.red{background:#fdecec;color:var(--red)}.cluster{border:1px solid var(--border);border-radius:10px;padding:12px;margin-bottom:12px}.cluster h3{margin:0 0 8px;font-size:15px}table{width:100%;border-collapse:collapse;font-size:13px}th,td{text-align:left;padding:8px;border-bottom:1px solid var(--border)}th{color:var(--muted);font-weight:600}.row{display:flex;gap:10px;align-items:center;flex-wrap:wrap}input,select,textarea{font:inherit;padding:7px 9px;border:1px solid var(--border);border-radius:8px;width:100%}textarea{min-height:160px;font-family:ui-monospace,monospace;font-size:12px}label{font-size:12px;color:var(--muted);display:block;margin-bottom:4px}.muted{color:var(--muted);font-size:13px}.center{display:flex;align-items:center;justify-content:center;min-height:100vh;flex-direction:column;gap:16px}.banner{background:var(--amber);color:#fff;padding:8px 14px;border-radius:8px;font-size:13px;margin-bottom:14px}.grid2{display:grid;grid-template-columns:1fr 1fr;gap:12px}