:root{--c-900: #181a1d;--c-850: #1e2125;--c-800: #24272c;--c-750: #2a2e33;--c-700: #30343a;--c-650: #373c43;--c-600: #40454d;--c-550: #4b515a;--c-500: #5a616b;--frame: #202327;--titlebar-1: #2c3036;--titlebar-2: #23262b;--ribbon: #2a2e33;--ribbon-tabs: #202327;--panel: #26292e;--canvas: #21242a;--line: #15171a;--line-soft: #393e45;--line-hair: #30343a;--text: #e7eaee;--text-2: #b9c0c8;--text-dim: #8b929b;--text-faint: #69707a;--accent: #2f9be0;--accent-2: #5bb6f0;--accent-deep: #1e7ec2;--accent-glow: rgba(47, 155, 224, .35);--good: #4cc38a;--warn: #e0a23a;--bad: #e0654b;--gold: #ffd45e;--radius: 5px;--radius-lg: 9px;--shadow-1: 0 1px 2px rgba(0, 0, 0, .4);--shadow-2: 0 6px 18px rgba(0, 0, 0, .45);--shadow-3: 0 16px 44px rgba(0, 0, 0, .55);--font: "Segoe UI Variable Text", "Segoe UI", -apple-system, "Inter", system-ui, Arial, sans-serif;--font-disp: "Segoe UI Variable Display", "Segoe UI Semibold", "Segoe UI", var(--font);--mono: "Cascadia Code", "Cascadia Mono", "Consolas", "SF Mono", 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.modal-close{margin-left:auto;color:var(--text-dim);font-size:18px;width:26px;height:26px;border-radius:6px}.modal-title .modal-close:hover{background:var(--bad);color:#fff}.modal-body{padding:16px;overflow:auto}.modal-footer{display:flex;justify-content:flex-end;gap:9px;padding:12px 16px;border-top:1px solid var(--line);background:var(--c-850)}.btn{background:var(--c-700);border:1px solid var(--line-soft);border-radius:6px;padding:6px 18px;font-size:12.5px;color:var(--text);transition:background .12s,border-color .12s}.btn:hover{background:var(--c-650);border-color:var(--c-550)}.btn.primary{background:linear-gradient(180deg,var(--accent-2),var(--accent-deep));border-color:var(--accent-deep);color:#fff;font-weight:500}.btn.primary:hover{filter:brightness(1.08)}.form-row{display:flex;align-items:center;gap:12px;margin-bottom:11px}.form-row label{width:158px;color:var(--text-dim);font-size:12px}.form-row input,.form-row select,.form-row textarea{flex:1;background:var(--c-850);color:var(--text);border:1px solid var(--line-soft);border-radius:6px;padding:6px 9px;font-size:12.5px;font-family:inherit;outline:none}.form-row input:focus,.form-row select:focus,.form-row textarea:focus{border-color:var(--accent);box-shadow:0 0 0 2px var(--accent-glow)}.form-row textarea{font-family:var(--mono);resize:vertical;min-height:120px}.form-hint{font-size:11px;color:var(--text-faint);margin:-5px 0 11px 170px}.scl-input{width:100%;min-height:170px;background:var(--c-900);color:var(--text);border:1px solid var(--line-soft);border-radius:7px;padding:9px;font-family:var(--mono);font-size:12.5px;resize:vertical;outline:none}.scl-output{max-height:170px;min-height:36px;overflow:auto;background:var(--c-900);border:1px solid var(--line-soft);border-radius:7px;padding:7px 9px;font-family:var(--mono);font-size:11.5px;margin-top:5px}.nav-btn{background:var(--c-700);border:1px solid var(--line-soft);border-radius:5px;padding:3px 11px;font-size:12px;color:var(--text-2)}.nav-btn:hover{background:var(--c-650)}.sec-editor{display:flex;flex-direction:column;gap:10px;min-width:560px}.sec-toolbar{display:flex;align-items:center;gap:6px}.sec-step{min-width:34px;padding:4px 8px;font-size:13px}.sec-readout{margin:0 8px;color:var(--text-2);font-size:12px;font-variant-numeric:tabular-nums}.sec-view{border-radius:8px;overflow:hidden}.sec-svg{display:block;width:100%;height:auto;background:#14181e;border:1px solid var(--line);border-radius:8px}.sec-bottom{display:flex;gap:12px;align-items:flex-start}.sec-table{flex:1 1 auto;max-height:168px;overflow:auto}.sec-pt-table{width:100%;border-collapse:collapse;font-size:11.5px}.sec-pt-table th,.sec-pt-table td{padding:3px 8px;border-bottom:1px solid var(--line-soft);text-align:left}.sec-pt-table th{color:var(--text-faint);font-weight:600;position:sticky;top:0;background:var(--panel)}.sec-pt-table td.num,.sec-pt-table th.num{text-align:right;font-variant-numeric:tabular-nums}.sec-pt-table tr.row-warn td{color:#ff9b9b;font-weight:600}.report-pre{margin:0;max-height:420px;overflow:auto;font-family:var(--mono);font-size:12px;line-height:1.5;color:var(--text);white-space:pre-wrap;word-break:break-word;background:var(--c-800, #1a1d22);border:1px solid var(--line-soft);border-radius:6px;padding:12px 14px}.sec-grade{flex:0 0 200px;background:var(--c-750);border:1px solid var(--line-soft);border-radius:8px;padding:9px 11px}.sec-grade-title{font-size:11.5px;font-weight:600;color:var(--text-2);margin-bottom:7px}.sec-grade-row{display:flex;align-items:center;gap:6px}.sec-grade-row label{font-size:11px;color:var(--text-dim)}.sec-adjust{width:58px}.pcv-viewer{display:flex;flex-direction:column;gap:8px;min-width:720px}.pcv-stage{border-radius:8px;overflow:hidden;border:1px solid var(--line);background:#0e1116}.pcv-canvas{display:block;width:100%;height:auto;cursor:grab;touch-action:none}.pcv-canvas:active{cursor:grabbing}.pcv-modes,.pcv-ctrls{display:flex;align-items:center;gap:6px;flex-wrap:wrap}.pcv-lbl{font-size:11.5px;color:var(--text-dim);margin-right:2px}.pcv-sep{width:1px;height:18px;background:var(--line-soft);margin:0 4px}.pcv-mode.active{background:linear-gradient(180deg,var(--accent),var(--accent-2));color:#fff;border-color:var(--accent)}.pcv-info{font-size:11px;color:var(--text-faint);font-variant-numeric:tabular-nums}.lessons{display:grid;grid-template-columns:250px 1fr;gap:0;min-width:780px;height:460px;border:1px solid var(--line);border-radius:8px;overflow:hidden}.lesson-list{overflow-y:auto;background:var(--c-800, #1a1d22);border-right:1px solid var(--line);padding:6px}.lesson-mod-title{font-size:10.5px;font-weight:700;letter-spacing:.3px;text-transform:uppercase;color:var(--text-faint);padding:12px 8px 5px}.lesson-item{display:block;width:100%;text-align:left;padding:6px 9px;border:1px solid transparent;border-radius:6px;color:var(--text-2);font-size:12px;background:transparent;cursor:pointer;transition:background .12s,color .12s}.lesson-item:hover{background:var(--c-700, #23272e);color:var(--text)}.lesson-item.active{background:linear-gradient(180deg,var(--accent),var(--accent-2));color:#fff;border-color:var(--accent)}.lesson-theory{font-size:11px;color:var(--text-dim);padding:2px 9px;line-height:1.5}.lesson-detail{overflow-y:auto;padding:16px 20px}.lesson-title{margin:0 0 6px;font-size:16px;color:var(--text)}.lesson-objective{font-size:12.5px;color:var(--accent-2);margin-bottom:14px}.lesson-steps{margin:0;padding-left:20px;display:flex;flex-direction:column;gap:11px}.lesson-steps li{font-size:12.5px;line-height:1.5;color:var(--text-2)}.lesson-run{display:inline-block;margin-left:8px;padding:2px 10px;font-size:11px;background:linear-gradient(180deg,var(--accent),var(--accent-2));color:#fff;border:none;border-radius:5px;cursor:pointer;vertical-align:middle}.lesson-run:hover{filter:brightness(1.1)}