:root{--bg:#111;--surface:#1b1a1f;--surface-strong:#27242b;--ink:#f4f0ec;--muted:#b4ada7;--soft:#312d35;--line:#433d46;--accent:#e85d75;--accent-dark:#ff9a6a;--accent-soft:#e85d7526;--coral:#ff6b57;--coral-soft:#ff6b5729;--yellow:#f0c44c;--code:#0b0a0e;--radius:8px;--shadow:0 20px 48px #00000052}*{box-sizing:border-box}html{scroll-behavior:smooth}body{min-height:100vh;color:var(--ink);background:linear-gradient(180deg, #e85d7529, transparent 360px), var(--bg);margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}a{color:var(--accent-dark)}button,input,select,textarea{font:inherit}button{cursor:pointer}.app-shell{width:min(100%,1760px);margin:0 auto;padding:24px}.topbar{justify-content:space-between;align-items:flex-start;gap:20px;padding:20px 0 18px;display:flex}.eyebrow{color:var(--accent-dark);letter-spacing:0;text-transform:uppercase;margin:0 0 6px;font-size:13px;font-weight:700}h1,h2,h3,p{margin-top:0}h1{letter-spacing:0;margin-bottom:8px;font-size:34px;line-height:1.08}h2{letter-spacing:0;margin-bottom:8px;font-size:22px;line-height:1.2}h3{letter-spacing:0;margin-bottom:0;font-size:17px;line-height:1.25}.subtitle{max-width:680px;color:var(--muted);margin-bottom:0;font-size:16px;line-height:1.55}.topbar-actions,.tex-actions,.section-tools,.block-actions{flex-wrap:wrap;justify-content:flex-end;align-items:center;gap:8px;display:flex}.button,.mini-button,.chip-button,.level{border-radius:var(--radius);min-height:38px;color:var(--ink);background:var(--surface);border:1px solid #0000;justify-content:center;align-items:center;transition:background .15s,border-color .15s,transform 80ms;display:inline-flex}.button{padding:9px 14px;font-weight:700;text-decoration:none}.button:hover,.mini-button:hover,.chip-button:hover,.level:hover{transform:translateY(-1px)}.button.primary{color:#1b0f11;background:var(--accent)}.button.primary:hover{background:var(--accent-dark)}.button.primary.alt{color:#141006;background:var(--yellow)}.button.ghost,.mini-button,.chip-button{border-color:var(--line)}.button.ghost:hover,.mini-button:hover,.chip-button:hover{border-color:var(--accent);background:var(--accent-soft)}.button.danger{color:#fff;background:var(--coral)}.button.full{justify-content:center;width:100%}.mini-button{min-height:32px;padding:5px 9px;font-size:13px}.danger-text{color:var(--coral)}.summary-band{grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;margin-bottom:18px;display:grid}.summary-band>div{border:1px solid var(--line);border-radius:var(--radius);background:var(--surface);min-height:92px;box-shadow:var(--shadow);padding:16px}.summary-band span{color:var(--accent-dark);margin-bottom:6px;font-size:28px;font-weight:800;line-height:1;display:block}.summary-band p{color:var(--muted);margin-bottom:0}.meta-panel{border:1px solid var(--line);border-radius:var(--radius);background:var(--surface);box-shadow:var(--shadow);margin-bottom:22px;overflow:clip}.meta-panel summary{color:var(--ink);cursor:pointer;justify-content:space-between;align-items:center;gap:12px;padding:16px 18px;font-size:18px;font-weight:800;display:flex}.meta-panel summary small{color:var(--muted);font-size:13px;font-weight:500}.meta-grid{grid-template-columns:repeat(4,minmax(190px,1fr));gap:14px;padding:0 18px 18px;display:grid}.field{flex-direction:column;gap:7px;min-width:0;display:flex}.field.wide{grid-column:span 2}.meta-subsection{border:1px solid var(--line);border-radius:var(--radius);background:#ffffff05;gap:14px;padding:14px;display:grid}.meta-subsection.wide{grid-column:1/-1}.meta-subsection-header strong{margin-bottom:6px;font-size:15px;display:block}.meta-subsection-header p{color:var(--muted);margin-bottom:0;font-size:13px;line-height:1.5}.meta-subgrid{grid-template-columns:repeat(4,minmax(190px,1fr));gap:14px;display:grid}.field span,.toggle-field span{color:var(--muted);font-size:13px;font-weight:700}input,select,textarea{border:1px solid var(--line);border-radius:var(--radius);width:100%;min-width:0;color:var(--ink);background:#101411;outline:none}input,select{min-height:42px;padding:9px 11px}textarea{resize:vertical;padding:12px;line-height:1.55}input:focus,select:focus,textarea:focus{border-color:var(--accent);box-shadow:0 0 0 3px #18b7a52e}.toggle-field{align-items:center;gap:10px;min-width:0;display:flex}.toggle-field.wide{grid-column:1/-1}.toggle-field input{width:18px;min-width:18px;height:18px;min-height:18px;accent-color:var(--accent)}.workspace{grid-template-columns:minmax(240px,300px) minmax(0,1fr);align-items:start;gap:18px;display:grid}.side-panel{position:sticky;top:18px}.side-panel-inner{border:1px solid var(--line);border-radius:var(--radius);background:var(--surface);box-shadow:var(--shadow);padding:16px}.side-panel p{color:var(--muted);margin-bottom:14px;font-size:14px;line-height:1.45}.search-field{margin-bottom:8px}.search-hint{color:var(--muted);margin-top:0;margin-bottom:14px;font-size:13px}.level-picker{gap:8px;margin-bottom:14px;display:grid}.level{border-color:var(--line);justify-content:space-between;align-items:center;gap:8px;min-height:54px;padding:9px 10px;font-weight:800;display:flex}.level span{color:var(--muted);font-size:12px;font-weight:600}.level.active{border-color:var(--accent);background:var(--accent-soft)}.side-actions{gap:8px;display:grid}.section-jump{border-top:1px solid var(--line);gap:6px;max-height:420px;margin-top:16px;padding-top:14px;display:grid;overflow:auto}.jump{border-radius:var(--radius);color:var(--ink);padding:8px 9px;font-size:13px;line-height:1.3;text-decoration:none}.jump:hover{background:var(--surface-strong)}.jump.active{background:var(--accent-soft);color:var(--accent-dark)}.jump.level-1{padding-left:22px}.jump.level-2{padding-left:36px}.editor-flow{gap:16px;min-width:0;display:grid}.empty-state,.section-panel,.tex-panel{border:1px solid var(--line);border-radius:var(--radius);background:var(--surface);box-shadow:var(--shadow)}.empty-state{padding:34px}.empty-state p{color:var(--muted)}.section-panel{scroll-margin-top:18px;overflow:clip}.section-panel.collapsed .section-head{border-bottom:0}.section-panel.selected{box-shadow:0 0 0 2px #e85d756b, var(--shadow)}.section-panel.level-1{border-left:6px solid var(--accent)}.section-panel.level-2{border-left:6px solid var(--yellow)}.section-head{border-bottom:1px solid var(--line);background:linear-gradient(90deg, var(--surface-strong), var(--surface));justify-content:space-between;align-items:flex-start;gap:16px;padding:16px;display:flex}.section-title-row{grid-template-columns:minmax(64px,auto) minmax(260px,1fr) minmax(150px,210px) minmax(180px,220px);align-items:end;gap:12px;width:100%;min-width:0;display:grid}.section-number{border-radius:var(--radius);color:#231411;background:var(--accent-dark);text-align:center;place-items:center;min-width:64px;height:44px;padding:0 8px;font-size:13px;font-weight:800;line-height:1;display:grid}.section-toggle{border:1px solid var(--line);border-radius:var(--radius);background:#101411;align-self:center;min-height:42px;padding:9px 11px}.graph-zero-toggle{border:1px solid var(--line);border-radius:var(--radius);background:#101411;min-height:42px;padding:9px 11px}.block-toolbar{border-bottom:1px solid var(--line);flex-wrap:wrap;gap:8px;padding:14px 16px;display:flex}.section-collapsed-summary{flex-wrap:wrap;gap:10px;padding:0 16px 16px;display:flex}.section-collapsed-summary span{border:1px solid var(--line);border-radius:var(--radius);min-height:32px;color:var(--muted);background:#111612;align-items:center;padding:6px 10px;font-size:13px;font-weight:700;display:inline-flex}.chip-button{min-height:34px;padding:6px 10px;font-size:13px;font-weight:700}.blocks{gap:14px;padding:16px;display:grid}.block-empty{border:1px dashed var(--line);border-radius:var(--radius);color:var(--muted);background:#111612;margin-bottom:0;padding:16px}.block-editor{border:1px solid var(--line);border-radius:var(--radius);background:#111612;gap:14px;padding:14px;display:grid}.block-editor.type-code{background:#121918}.block-head{justify-content:space-between;align-items:flex-start;gap:14px;display:flex}.block-index{color:var(--accent-dark);margin-bottom:3px;font-size:12px;font-weight:800;display:block}.block-grid{grid-template-columns:repeat(2,minmax(180px,1fr));gap:12px;display:grid}.large-textarea{min-height:220px}.code-textarea,.tex-output{font-family:JetBrains Mono,Fira Code,Consolas,monospace}.code-textarea{color:#e8f4ed;background:var(--code);border-color:#29342d;min-height:320px}.calculation-textarea{min-height:260px}.formula-toolbar{flex-wrap:wrap;gap:8px;display:flex}.inline-note{border-left:4px solid var(--accent);border-radius:var(--radius);color:var(--muted);background:var(--accent-soft);grid-column:1/-1;margin-bottom:0;padding:12px}.list-editor,.series-list{gap:12px;display:grid}.graph-preview{border:1px solid var(--line);border-radius:var(--radius);background:#0f1411;gap:12px;padding:14px;display:grid}.graph-preview-empty{border:1px dashed var(--line);border-radius:var(--radius);color:var(--muted);background:#101411;padding:18px}.graph-preview-meta{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:10px;display:flex}.graph-preview-meta strong{font-size:14px}.graph-preview-meta span{color:var(--muted);font-size:13px}.graph-preview-frame{border:1px solid var(--line);border-radius:var(--radius);background:linear-gradient(#e85d7514,#0000 44%),#0a0d0b;overflow:hidden}.graph-preview-svg{width:100%;height:auto;display:block}.graph-grid-line{stroke:#f4f0ec1f;stroke-width:1px}.graph-grid-line.vertical{stroke:#f4f0ec12}.graph-axis-line{stroke:#f4f0ec80;stroke-width:1.5px}.graph-series-line{fill:none;stroke-linecap:round;stroke-linejoin:round;stroke-width:3px}.graph-series-point{stroke:#0a0d0b;stroke-width:2px}.graph-axis-label,.graph-axis-title,.graph-title{fill:var(--ink);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}.graph-axis-label{fill:var(--muted);font-size:12px}.graph-axis-title{font-size:13px;font-weight:700}.graph-title{font-size:14px;font-weight:800}.graph-legend{flex-wrap:wrap;gap:8px;display:flex}.graph-legend-item{border:1px solid var(--line);border-radius:var(--radius);background:#101411;align-items:center;gap:8px;min-height:32px;padding:5px 10px;font-size:13px;font-weight:700;display:inline-flex}.graph-legend-swatch{border-radius:999px;width:12px;height:12px;box-shadow:0 0 0 1px #ffffff26}.series-editor{border:1px solid var(--line);border-radius:var(--radius);background:#0f1411;gap:12px;padding:12px;display:grid}.series-head{justify-content:space-between;align-items:center;gap:12px;display:flex}.list-row{grid-template-columns:minmax(160px,.85fr) minmax(220px,1.4fr) auto;align-items:end;gap:10px;display:grid}.list-remove{min-width:78px}.tex-panel{margin-top:24px;overflow:clip}.tex-head{border-bottom:1px solid var(--line);background:var(--surface);justify-content:space-between;align-items:flex-start;gap:18px;padding:18px;display:flex}.tex-head p{color:var(--muted);margin-bottom:0}.tex-state{border:1px solid var(--line);border-radius:var(--radius);color:var(--accent-dark);background:var(--accent-soft);margin-top:10px;padding:6px 9px;font-size:13px;font-weight:700;display:inline-flex}.tex-state.dirty{color:var(--yellow);background:#f2c94c24}.tex-output{color:#e8f4ed;background:var(--code);white-space:pre;border:0;border-radius:0;min-height:620px;display:block}.tex-output:focus{box-shadow:none}@media (max-width:1180px){.workspace{grid-template-columns:1fr}.side-panel{position:static}.side-panel-inner{grid-template-columns:minmax(220px,1fr) minmax(240px,1fr);gap:14px;display:grid}.side-panel-inner h2,.side-panel-inner p,.section-jump{grid-column:1/-1}.section-jump{max-height:none}}@media (max-width:900px){.app-shell{padding:16px}.topbar,.section-head,.block-head,.tex-head{flex-direction:column}.topbar-actions,.section-tools,.block-actions,.tex-actions{justify-content:flex-start}.summary-band,.meta-grid,.meta-subgrid,.block-grid,.list-row,.side-panel-inner{grid-template-columns:1fr}.field.wide,.toggle-field.wide{grid-column:auto}.section-title-row{grid-template-columns:minmax(64px,auto) minmax(0,1fr)}.level-field,.section-toggle{grid-column:1/-1}}@media (max-width:560px){h1{font-size:28px}.button,.topbar-actions,.tex-actions{width:100%}.section-number{min-width:56px;height:38px}.section-title-row{grid-template-columns:minmax(56px,auto) minmax(0,1fr)}}