:root{--bg: #f4f5f7;--panel: #ffffff;--ink: #1c2330;--muted: #67708a;--line: #e2e6ee;--accent: #e8861a;--accent-ink: #b3620a;--good: #1f9d57;--warn: #d9822b;--bad: #d6453d;--shadow: 0 1px 3px rgba(20, 30, 50, .08), 0 4px 16px rgba(20, 30, 50, .05);--radius: 10px;font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,sans-serif;color:var(--ink)}*{box-sizing:border-box}body{margin:0;background:var(--bg)}.app-header{background:#161b26;color:#fff;padding:14px 28px;display:flex;align-items:center;gap:18px;box-shadow:var(--shadow)}.app-header .brand{font-weight:700;font-size:18px;letter-spacing:.3px}.app-header .brand b{color:var(--accent)}.app-header .sub{color:#9aa3b8;font-size:13px}.tabs{margin-left:auto;display:flex;gap:4px}.tabs button{background:transparent;border:none;color:#c3cad9;font-size:14px;padding:8px 16px;border-radius:8px;cursor:pointer;font-weight:500}.tabs button:hover{background:#ffffff12;color:#fff}.tabs button.active{background:var(--accent);color:#161b26;font-weight:600}.container{max-width:1280px;margin:0 auto;padding:24px 28px 80px}.builder{display:grid;grid-template-columns:1fr 380px;gap:24px;align-items:start}@media(max-width:1040px){.builder{grid-template-columns:1fr}}.panel{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:18px}.panel+.panel{margin-top:18px}.panel h2{margin:0 0 14px;font-size:15px;text-transform:uppercase;letter-spacing:.6px;color:var(--muted)}.panel h3{margin:18px 0 10px;font-size:14px}.summary{position:sticky;top:24px}label.field{display:block;margin-bottom:12px;font-size:13px;color:var(--muted)}label.field span{display:block;margin-bottom:4px}input,select,textarea{width:100%;padding:8px 10px;border:1px solid var(--line);border-radius:7px;font-size:14px;color:var(--ink);background:#fff;font-family:inherit}input:focus,select:focus,textarea:focus{outline:2px solid var(--accent);border-color:var(--accent)}.row{display:flex;gap:10px}.row>*{flex:1}button.btn{background:var(--accent);color:#161b26;border:none;padding:10px 16px;border-radius:8px;font-size:14px;font-weight:600;cursor:pointer}button.btn:hover{background:var(--accent-ink);color:#fff}button.btn.secondary{background:#eef0f5;color:var(--ink)}button.btn.secondary:hover{background:#e2e6ee}button.btn.ghost{background:transparent;color:var(--muted);padding:6px 10px}button.btn.ghost:hover{color:var(--bad);background:#fbeceb}button.btn:disabled{opacity:.5;cursor:not-allowed}.dropzone{border:2px dashed var(--line);border-radius:var(--radius);padding:30px;text-align:center;color:var(--muted);cursor:pointer;transition:.15s}.dropzone:hover,.dropzone.drag{border-color:var(--accent);background:#fdf6ec;color:var(--accent-ink)}.dropzone b{color:var(--ink)}.lineitem{border:1px solid var(--line);border-radius:var(--radius);margin-bottom:16px;overflow:hidden}.lineitem-head{display:flex;align-items:center;gap:10px;padding:12px 16px;background:#fafbfc;border-bottom:1px solid var(--line)}.lineitem-head .fname{font-weight:600;font-size:14px}.badge{font-size:11px;font-weight:700;text-transform:uppercase;padding:2px 7px;border-radius:5px;background:#eef0f5;color:var(--muted);letter-spacing:.4px}.badge.dxf{background:#e6f0fb;color:#2b6cb0}.badge.dwg{background:#eae9fb;color:#5b46b0}.badge.svg{background:#eaf7ee;color:#2f855a}.badge.pdf{background:#fdeaea;color:#c0392b}.lineitem-body{padding:16px;display:grid;grid-template-columns:260px 1fr;gap:18px}@media(max-width:720px){.lineitem-body{grid-template-columns:1fr}}.preview-box{background:#0f1420;border-radius:8px;padding:8px}.preview-box svg{width:100%;height:auto;display:block}.preview-empty{color:#6b7488;text-align:center;padding:40px 10px;font-size:13px}.seg{display:flex;gap:0;border:1px solid var(--line);border-radius:8px;overflow:hidden;margin-bottom:14px}.seg button{flex:1;background:#fff;border:none;padding:8px 10px;font-size:13px;cursor:pointer;color:var(--muted);font-weight:500}.seg button+button{border-left:1px solid var(--line)}.seg button.on{background:var(--accent);color:#161b26;font-weight:700}.layer-chips{display:flex;flex-wrap:wrap;gap:6px;margin-top:10px}.chip{font-size:12px;padding:4px 9px;border-radius:14px;border:1px solid var(--line);cursor:pointer;background:#fff;color:var(--muted);display:inline-flex;gap:6px;align-items:center}.chip.on{background:#fdf6ec;border-color:var(--accent);color:var(--accent-ink);font-weight:600}.chip .dot{width:9px;height:9px;border-radius:50%;background:currentColor}.readout{display:grid;grid-template-columns:repeat(auto-fit,minmax(110px,1fr));gap:10px;margin-top:14px}.stat{background:#f7f8fa;border-radius:8px;padding:9px 11px}.stat .k{font-size:11px;color:var(--muted);text-transform:uppercase;letter-spacing:.4px}.stat .v{font-size:16px;font-weight:700;margin-top:2px}.totals{width:100%;border-collapse:collapse;font-size:14px}.totals td{padding:7px 0;border-bottom:1px solid var(--line)}.totals td.r{text-align:right;font-variant-numeric:tabular-nums}.totals tr.grand td{font-size:18px;font-weight:800;border-bottom:none;padding-top:12px}.totals tr.muted td{color:var(--muted)}.note{background:#fff7e6;border:1px solid #f3d99b;color:#8a5a00;padding:8px 12px;border-radius:8px;font-size:13px;margin-top:10px}.note.bad{background:#fdeceb;border-color:#f3b6b2;color:#a3322b}.sanity{border:1px solid var(--line);border-radius:8px;padding:12px;margin-top:14px;font-size:13px}.sanity .pill{display:inline-block;padding:2px 8px;border-radius:12px;font-weight:700;font-size:12px}.pill.ok{background:#e6f6ec;color:var(--good)}.pill.hi{background:#fdeceb;color:var(--bad)}.pill.warn{background:#fcf0df;color:var(--warn)}table.grid{width:100%;border-collapse:collapse;font-size:13px;margin-top:8px}table.grid th,table.grid td{text-align:left;padding:7px 8px;border-bottom:1px solid var(--line)}table.grid th{color:var(--muted);font-weight:600;font-size:12px;text-transform:uppercase;letter-spacing:.3px}table.grid input,table.grid select{padding:5px 7px;font-size:13px}table.grid td.num{text-align:right}.muted{color:var(--muted)}.small{font-size:12px}.actions{display:flex;gap:10px;margin-top:16px;flex-wrap:wrap}.hint{font-size:12px;color:var(--muted);margin-top:4px}.empty-state{text-align:center;color:var(--muted);padding:40px 0}