.gr-section{margin-top:clamp(3.4rem,7vw,6.2rem)}
.gr-hero{scroll-margin-top:calc(var(--header-h) + 18px);padding-top:clamp(3rem,7vw,6rem);display:grid;grid-template-columns:minmax(0,1.15fr) minmax(280px,.85fr);gap:clamp(1.4rem,4vw,4rem);align-items:center}
.gr-hero-copy :is(h1,h2){max-width:18ch}.gr-hero-copy p{max-width:76ch;color:var(--muted)}.gr-hero-actions{display:flex;flex-wrap:wrap;gap:.7rem;margin-top:1.25rem}
.gr-hero-card,.gr-card,.gr-boundary-grid article,.gr-panel,.gr-reading,.gr-controls,.gr-metrics>div,.gr-check-grid>div{border:1px solid var(--line);border-radius:14px;background:var(--panel)}
.gr-hero-card{padding:1.15rem;display:grid;gap:.65rem}.gr-hero-card>span,.gr-card>span,.gr-boundary-grid article>span,.gr-reading>span,.gr-panel-head span,.gr-control-head span{font-size:.72rem;letter-spacing:.11em;text-transform:uppercase;color:var(--muted)}
.gr-equation{padding:.6rem .7rem;border:1px solid var(--line);border-radius:10px;background:var(--panel-solid);font-family:var(--font-mono,ui-monospace,SFMono-Regular,Consolas,monospace);overflow-wrap:anywhere}.gr-equation.large{font-size:1.05rem;font-weight:750;color:var(--accent)}
.gr-mini-grid{display:grid;grid-template-columns:1fr 1fr;gap:.55rem}.gr-mini-grid div{padding:.58rem;border:1px solid var(--line);border-radius:10px}.gr-mini-grid span{display:block;font-size:.7rem;color:var(--muted)}.gr-mini-grid strong{display:block;margin-top:.15rem;font-size:.83rem}
.gr-foundation-grid,.gr-boundary-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1rem}.gr-card,.gr-boundary-grid article{padding:1.05rem}.gr-card h3{margin:.35rem 0 .55rem}.gr-card p,.gr-boundary-grid p{margin:0;color:var(--muted)}
.gr-note{margin-top:1rem;border-left:3px solid var(--accent-2);padding:.8rem 1rem;background:color-mix(in srgb,var(--panel) 88%,transparent);border-radius:0 12px 12px 0}.gr-note p{display:inline;margin-left:.35rem;color:var(--muted)}
.gr-lab-shell{display:grid;grid-template-columns:minmax(270px,340px) minmax(0,1fr);gap:1rem;align-items:start}.gr-controls{position:sticky;top:5.5rem;padding:1rem;display:grid;gap:.9rem;min-width:0}.gr-control-head{display:flex;justify-content:space-between;gap:.8rem;align-items:start}.gr-control-head strong{display:block}.gr-status{font-size:.76rem;font-weight:700;color:var(--accent);text-align:right}
.gr-controls label{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:.32rem .7rem;align-items:center;font-size:.86rem}.gr-controls label output{font-variant-numeric:tabular-nums;font-weight:700;color:var(--text);overflow-wrap:anywhere}.gr-controls input[type=range]{grid-column:1/-1;width:100%}
.gr-presets{border:1px solid var(--line);border-radius:11px;padding:.65rem}.gr-presets legend{padding:0 .35rem;color:var(--muted);font-size:.74rem}.gr-presets div{display:grid;grid-template-columns:1fr 1fr;gap:.4rem}.gr-presets button{border:1px solid var(--line);background:var(--panel-solid);color:var(--text);border-radius:8px;padding:.52rem .5rem;font:inherit;font-size:.73rem;cursor:pointer}.gr-presets button:hover,.gr-presets button.is-active{border-color:var(--accent);color:var(--accent)}
.gr-actions{display:grid}.gr-assumption{font-size:.76rem;color:var(--muted);border-top:1px solid var(--line);padding-top:.8rem}.gr-assumption strong{color:var(--text)}.gr-assumption p{margin:.3rem 0 0}
.gr-stage{display:grid;gap:1rem;min-width:0}.gr-metrics{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:.65rem}.gr-check-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:.65rem}.gr-metrics>div,.gr-check-grid>div{padding:.75rem;min-width:0}.gr-metrics span,.gr-check-grid span{display:block;font-size:.72rem;color:var(--muted)}.gr-metrics strong,.gr-check-grid strong{display:block;margin-top:.22rem;font-size:.84rem;overflow-wrap:anywhere;font-variant-numeric:tabular-nums}
.gr-top-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:1rem}.gr-panel{padding:.85rem;min-width:0}.gr-panel-head{display:flex;justify-content:space-between;gap:1rem;margin-bottom:.5rem}.gr-panel-head strong{display:block}.gr-readout{text-align:right}.gr-readout strong{display:block;color:var(--accent);font-size:.83rem}.gr-panel svg{display:block;width:100%;height:auto;overflow:visible}.gr-reading{padding:1rem}.gr-reading h3{margin:.35rem 0 .5rem}.gr-reading p{margin:0;color:var(--muted)}
.gr-svg-axis{stroke:var(--muted);stroke-width:1.5}.gr-svg-grid{stroke:var(--line);stroke-width:1}.gr-svg-guide{stroke:var(--accent-3);stroke-width:1.5;stroke-dasharray:5 6}.gr-svg-marker{stroke:var(--accent-2);stroke-width:2.5;stroke-dasharray:7 6}.gr-svg-label{fill:var(--text);font-size:17px;font-weight:700}.gr-svg-small{fill:var(--muted);font-size:14px}.gr-svg-accent{fill:var(--accent);font-size:15px;font-weight:700}.gr-svg-violet{fill:var(--accent-2);font-size:15px;font-weight:700}.gr-svg-green{fill:var(--accent-3);font-size:15px;font-weight:700}.gr-level{stroke:var(--accent-2);stroke-width:5;stroke-linecap:round}.gr-level.final{stroke:var(--accent)}.gr-photon{fill:none;stroke:var(--warm);stroke-width:3}.gr-recoil{stroke:var(--accent-3);stroke-width:3;marker-end:url(#gr-arrow)}.gr-line{fill:none;stroke:var(--accent);stroke-width:3}.gr-line-fill{fill:color-mix(in srgb,var(--accent) 13%,transparent)}
@media(max-width:1180px){.gr-metrics{grid-template-columns:repeat(3,minmax(0,1fr))}.gr-top-grid{grid-template-columns:1fr}}
@media(max-width:980px){.gr-lab-shell,.gr-hero{grid-template-columns:1fr}.gr-controls{position:static}.gr-foundation-grid,.gr-boundary-grid{grid-template-columns:1fr}.gr-hero-copy :is(h1,h2){max-width:22ch}}
@media(max-width:640px){.gr-metrics,.gr-check-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.gr-panel{padding:.65rem}.gr-panel-head{display:grid}.gr-readout{text-align:left}.gr-controls{padding:.85rem}.gr-panel svg{aspect-ratio:1.42}.gr-note p{display:block;margin:.35rem 0 0}.gr-mini-grid{grid-template-columns:1fr}}
@media(max-width:380px){.gr-metrics,.gr-check-grid,.gr-presets div{grid-template-columns:1fr}.gr-control-head{display:grid}.gr-status{text-align:left;max-width:none}}
.gr-controls,.gr-stage,.gr-panel,.gr-metrics,.gr-top-grid,.gr-foundation-grid,.gr-boundary-grid,.gr-hero{min-width:0;max-width:100%}.gr-control-head>*{min-width:0}.gr-control-head strong,.gr-status{overflow-wrap:anywhere}.gr-assumption .mono{white-space:normal;overflow-wrap:anywhere}