:root{--bg: #0f1419;--panel: #171e26;--panel-2: #1d2630;--border: #2a3542;--text: #e6edf3;--muted: #8b98a8;--accent: #2fce8f;--accent-2: #17b4f2;--danger: #f2545b;--radius: 12px;color-scheme:dark}*{box-sizing:border-box}html,body,#root{height:100%}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Hiragino Sans GB,Microsoft YaHei,sans-serif;background:radial-gradient(1200px 600px at 15% -10%,#16232e 0%,var(--bg) 55%);color:var(--text);font-size:14px;line-height:1.6}.app{max-width:1240px;margin:0 auto;padding:32px 20px 80px}header.hero{padding:20px 0 26px}header.hero h1{margin:0 0 6px;font-size:26px;letter-spacing:.5px}header.hero p{margin:0;color:var(--muted)}.card{background:var(--panel);border:1px solid var(--border);border-radius:var(--radius);padding:20px;margin-bottom:18px}.card h2{margin:0 0 4px;font-size:15px;font-weight:600}.card .hint{margin:0 0 16px;color:var(--muted);font-size:12.5px}.step-badge{display:inline-flex;align-items:center;justify-content:center;width:20px;height:20px;border-radius:50%;background:var(--accent);color:#06241a;font-size:12px;font-weight:700;margin-right:8px}.dropzone{border:2px dashed var(--border);border-radius:var(--radius);padding:42px 20px;text-align:center;cursor:pointer;transition:border-color .15s,background .15s;background:var(--panel-2)}.dropzone:hover,.dropzone.drag{border-color:var(--accent);background:#1a2b28}.dropzone .big{font-size:16px;font-weight:600;margin-bottom:6px}.dropzone .sub{color:var(--muted);font-size:12.5px}.file-chip{display:flex;align-items:center;gap:10px;background:var(--panel-2);border:1px solid var(--border);border-radius:10px;padding:10px 14px;margin-top:12px;font-size:13px}.file-chip .name{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.file-chip .meta{color:var(--muted);font-size:12px}label.field{display:block;margin-bottom:14px}label.field>span{display:block;font-size:12.5px;color:var(--muted);margin-bottom:6px}select{width:100%;background:var(--panel-2);color:var(--text);border:1px solid var(--border);border-radius:9px;padding:10px 12px;font-size:13.5px;outline:none}select:focus{border-color:var(--accent-2)}.btn{border:0;border-radius:9px;padding:11px 20px;font-size:14px;font-weight:600;cursor:pointer;transition:opacity .15s,transform .05s;background:var(--accent);color:#06241a}.btn:hover{opacity:.9}.btn:active{transform:translateY(1px)}.btn:disabled{opacity:.45;cursor:not-allowed}.btn.secondary{background:var(--panel-2);color:var(--text);border:1px solid var(--border)}.btn.small{padding:7px 13px;font-size:12.5px}.btn-row{display:flex;gap:10px;flex-wrap:wrap}.columns-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:10px}.col-toggle{display:flex;align-items:center;gap:9px;background:var(--panel-2);border:1px solid var(--border);border-radius:9px;padding:10px 12px;cursor:pointer;font-size:13px;-webkit-user-select:none;user-select:none;transition:border-color .15s,background .15s}.col-toggle:hover{border-color:#3b4b5c}.col-toggle.active{border-color:var(--accent);background:#17322a}.col-toggle input{accent-color:var(--accent);width:15px;height:15px;margin:0}.col-toggle .label{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.agg-list{display:flex;flex-direction:column;gap:8px;max-height:380px;overflow:auto;padding-right:4px}.agg-row{display:grid;grid-template-columns:minmax(120px,1.4fr) minmax(150px,1fr);gap:12px;align-items:center;background:var(--panel-2);border:1px solid var(--border);border-radius:9px;padding:8px 12px}.agg-row .colname{font-size:13px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.agg-row select{padding:7px 10px;font-size:12.5px}.switches{display:flex;gap:20px;flex-wrap:wrap;margin-top:14px}.switch{display:flex;align-items:center;gap:8px;font-size:12.5px;color:var(--muted);cursor:pointer}.switch input{accent-color:var(--accent);width:15px;height:15px;margin:0}.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:12px;margin:4px 0}.stat{background:var(--panel-2);border:1px solid var(--border);border-radius:10px;padding:12px 14px}.stat .k{color:var(--muted);font-size:12px}.stat .v{font-size:20px;font-weight:700;margin-top:2px}.table-wrap{overflow:auto;border:1px solid var(--border);border-radius:10px;max-height:460px}table.preview{border-collapse:collapse;width:100%;font-size:12.5px;white-space:nowrap}table.preview thead th{position:sticky;top:0;background:#212c37;text-align:left;padding:10px 12px;font-weight:600;border-bottom:1px solid var(--border);z-index:1}table.preview tbody td{padding:9px 12px;border-bottom:1px solid #202a34;max-width:320px;overflow:hidden;text-overflow:ellipsis}table.preview tbody tr:hover td{background:#1a232c}.tag{display:inline-block;background:#17322a;color:var(--accent);border-radius:6px;padding:1px 7px;font-size:11.5px}.muted{color:var(--muted)}.error{color:var(--danger);font-size:13px;margin-top:10px}.section-head{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;margin-bottom:14px}.section-head h2{margin:0}.tip{background:#12242b;border:1px solid #1d4451;border-left:3px solid var(--accent-2);border-radius:8px;padding:10px 14px;font-size:12.5px;color:#a9c3cc;margin-bottom:16px}@media (max-width: 640px){.app{padding:20px 14px 60px}header.hero h1{font-size:21px}}