body.bmc-math{--surface:#ffffff;--surface-muted:#f1f5f9;--border:#e2e8f0;--text-main:#0f172a;--text-muted:#64748b;--primary:#2563eb;--primary-dark:#1d4ed8;--accent:#7c3aed;--shadow-soft:0 8px 30px rgba(15,23,42,0.08);color:var(--text-main);}
.gpg-lede{font-size:1.05rem;color:var(--text-main);max-width:42rem;margin:0 0 1.25rem;line-height:1.55;}
.gpg-pill-row{display:flex;flex-wrap:wrap;gap:0.5rem;margin-top:0.75rem;}
.gpg-pill{display:inline-flex;align-items:center;padding:0.35rem 0.75rem;border-radius:999px;font-size:0.8125rem;font-weight:600;background:var(--surface-muted);color:var(--text-muted);border:1px solid var(--border);}
.gpg-mistakes{margin-bottom:1.75rem;padding:1rem 1.15rem;border-radius:14px;border:1px solid var(--border);background:linear-gradient(135deg,var(--surface-muted) 0%,var(--surface) 100%);box-shadow:var(--shadow-soft);}
.gpg-mistakes h2{font-size:1.15rem;margin:0 0 0.65rem;font-weight:700;color:var(--text-main);}
.gpg-mistakes ul{margin:0;padding-left:1.2rem;color:var(--text-muted);line-height:1.55;}
.gpg-mistakes li{margin-bottom:0.4rem;}
.gpg-workspace{margin-bottom:2.5rem;}
.gpg-shell{display:grid;grid-template-columns:1fr;gap:1.25rem;}
@media (min-width:900px){.gpg-shell{grid-template-columns:minmax(0,1fr) minmax(280px,340px);align-items:start;}}
.gpg-stage-panel{background:var(--surface);border:1px solid var(--border);border-radius:18px;padding:1rem;box-shadow:var(--shadow-soft);}
.gpg-stage-head{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:0.75rem;margin-bottom:0.75rem;}
.gpg-stage-label{font-size:0.75rem;font-weight:700;letter-spacing:0.06em;text-transform:uppercase;color:var(--text-muted);}
.gpg-readout{display:flex;flex-wrap:wrap;gap:0.65rem 1rem;font-size:0.8125rem;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;color:var(--text-muted);}
.gpg-readout span{color:var(--text-main);}
#gpgCanvasWrap{display:flex;justify-content:center;align-items:center;background:radial-gradient(ellipse at 50% 30%,color-mix(in srgb,var(--primary) 12%,transparent),transparent 55%),var(--surface-muted);border-radius:14px;padding:0.75rem;min-height:min(72vw,420px);}
#gpgCanvas{display:block;border-radius:12px;background:#fff;box-shadow:0 12px 40px rgba(0,0,0,0.08);}
.gpg-control-deck{background:var(--surface);border:1px solid var(--border);border-radius:18px;padding:1rem 1.1rem;box-shadow:var(--shadow-soft);}
.gpg-deck-title{font-size:0.7rem;font-weight:700;letter-spacing:0.08em;text-transform:uppercase;color:var(--text-muted);margin:0 0 1rem;}
.gpg-field{margin-bottom:1rem;}
.gpg-field:last-child{margin-bottom:0;}
.gpg-field label{display:block;font-size:0.8125rem;font-weight:600;color:var(--text-main);margin-bottom:0.35rem;}
.gpg-field select,.gpg-field input[type="number"]{width:100%;padding:0.55rem 0.65rem;border-radius:10px;border:1px solid var(--border);background:var(--surface-muted);color:var(--text-main);font-size:0.9375rem;}
.gpg-range-top{display:flex;justify-content:space-between;align-items:baseline;font-size:0.8125rem;color:var(--text-muted);}
.gpg-range-top strong{color:var(--primary);font-variant-numeric:tabular-nums;}
input[type="range"].gpg-range{width:100%;height:6px;border-radius:4px;accent-color:var(--primary);margin:0.4rem 0 0;}
.gpg-actions{display:grid;grid-template-columns:1fr 1fr;gap:0.5rem;margin-top:1.1rem;}
@media (min-width:400px){.gpg-actions{grid-template-columns:repeat(3,1fr);}}
.gpg-btn{display:inline-flex;align-items:center;justify-content:center;gap:0.35rem;padding:0.6rem 0.75rem;border-radius:11px;font-size:0.875rem;font-weight:600;border:1px solid var(--border);background:var(--surface-muted);color:var(--text-main);cursor:pointer;transition:background 0.15s ease,border-color 0.15s ease,transform 0.1s ease;}
.gpg-btn:active{transform:scale(0.98);}
.gpg-btn--primary{background:var(--primary);border-color:var(--primary);color:#fff;}
.gpg-btn--primary:hover{background:var(--primary-dark);}
.gpg-btn--ghost{background:transparent;}
.gpg-btn--active{outline:2px solid var(--accent);outline-offset:2px;}
.gpg-live-hint{font-size:0.75rem;color:var(--text-muted);margin-top:0.85rem;line-height:1.45;}
.gpg-presets{margin-bottom:2.25rem;}
.gpg-presets h2{font-size:1.25rem;margin:0 0 0.5rem;font-weight:700;color:var(--text-main);}
.gpg-presets > p{color:var(--text-muted);margin:0 0 1rem;max-width:40rem;line-height:1.55;}
.gpg-preset-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:0.6rem;}
@media (min-width:600px){.gpg-preset-grid{grid-template-columns:repeat(4,1fr);}}
.gpg-preset-btn{text-align:left;padding:0.85rem 1rem;border-radius:14px;border:1px solid var(--border);background:var(--surface);cursor:pointer;transition:border-color 0.15s ease,box-shadow 0.15s ease;}
.gpg-preset-btn:hover{border-color:var(--primary);box-shadow:var(--shadow-soft);}
.gpg-preset-btn strong{display:block;font-size:0.9375rem;margin-bottom:0.25rem;color:var(--text-main);}
.gpg-preset-btn span{font-size:0.75rem;color:var(--text-muted);line-height:1.35;}
.gpg-article-grid{display:grid;gap:2rem;margin-bottom:2.5rem;}
@media (min-width:768px){.gpg-article-grid{grid-template-columns:1fr 1fr;}}
.gpg-prose h2{font-size:1.2rem;margin:0 0 0.65rem;font-weight:700;color:var(--text-main);}
.gpg-prose p{color:var(--text-muted);line-height:1.65;margin:0 0 0.85rem;}
.gpg-prose p:last-child{margin-bottom:0;}
.gpg-callout{margin:1.5rem 0;padding:1rem 1.1rem;border-left:4px solid var(--accent);background:var(--surface-muted);border-radius:0 12px 12px 0;font-size:0.9375rem;color:var(--text-main);line-height:1.55;}
.gpg-table-wrap{overflow-x:auto;margin:1rem 0;border-radius:12px;border:1px solid var(--border);}
.gpg-table{width:100%;border-collapse:collapse;font-size:0.875rem;}
.gpg-table th,.gpg-table td{padding:0.65rem 0.85rem;text-align:left;border-bottom:1px solid var(--border);}
.gpg-table th{background:var(--surface-muted);font-weight:700;color:var(--text-main);}
.gpg-table td{color:var(--text-muted);}
.gpg-table tr:last-child td{border-bottom:none;}
.gpg-dl{margin:1rem 0;}
.gpg-dl dt{font-weight:700;font-size:0.9rem;margin-top:0.75rem;color:var(--text-main);}
.gpg-dl dt:first-child{margin-top:0;}
.gpg-dl dd{margin:0.25rem 0 0;padding:0;color:var(--text-muted);line-height:1.55;}
.gpg-updated{font-size:0.8125rem;color:var(--text-muted);margin-top:2rem;padding-top:1rem;border-top:1px solid var(--border);}