.ar-section{margin-top:clamp(3.4rem,7vw,6.2rem)}
.ar-hero{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}
.ar-hero-copy :is(h1,h2){max-width:16ch}.ar-hero-copy p{max-width:74ch;color:var(--muted)}.ar-hero-actions{display:flex;flex-wrap:wrap;gap:.7rem;margin-top:1.25rem}
.ar-hero-card,.ar-card,.ar-boundary-grid article,.ar-panel,.ar-reading,.ar-controls,.ar-metrics>div,.ar-check-grid>div{border:1px solid var(--line);border-radius:14px;background:var(--panel)}
.ar-hero-card{padding:1.15rem;display:grid;gap:.65rem}.ar-hero-card>span,.ar-card>span,.ar-boundary-grid article>span,.ar-reading>span,.ar-panel-head span,.ar-control-head span{font-size:.72rem;letter-spacing:.11em;text-transform:uppercase;color:var(--muted)}
.ar-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}.ar-equation.large{font-size:1.08rem;font-weight:750;color:var(--accent)}
.ar-mini-grid{display:grid;grid-template-columns:1fr 1fr;gap:.55rem}.ar-mini-grid div{padding:.58rem;border:1px solid var(--line);border-radius:10px}.ar-mini-grid span{display:block;font-size:.7rem;color:var(--muted)}.ar-mini-grid strong{display:block;margin-top:.15rem;font-size:.83rem}
.ar-foundation-grid,.ar-boundary-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1rem}.ar-card,.ar-boundary-grid article{padding:1.05rem}.ar-card h3{margin:.35rem 0 .55rem}.ar-card p,.ar-boundary-grid p{margin:0;color:var(--muted)}
.ar-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}.ar-note p{display:inline;margin-left:.35rem;color:var(--muted)}
.ar-lab-shell{display:grid;grid-template-columns:minmax(250px,320px) minmax(0,1fr);gap:1rem;align-items:start}.ar-controls{position:sticky;top:5.5rem;padding:1rem;display:grid;grid-template-columns:minmax(0,1fr);gap:.9rem;min-width:0}.ar-control-head{display:flex;justify-content:space-between;gap:.8rem;align-items:start}.ar-control-head strong{display:block}.ar-status{font-size:.76rem;font-weight:700;color:var(--accent);text-align:right}
.ar-controls label{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:.32rem .7rem;align-items:center;font-size:.86rem}.ar-controls label output{font-variant-numeric:tabular-nums;font-weight:700;color:var(--text);overflow-wrap:anywhere}.ar-controls input[type=range]{grid-column:1/-1;width:100%}
.ar-presets{border:1px solid var(--line);border-radius:11px;padding:.65rem}.ar-presets legend{padding:0 .35rem;color:var(--muted);font-size:.74rem}.ar-presets div{display:grid;grid-template-columns:1fr 1fr;gap:.4rem}.ar-presets button{border:1px solid var(--line);background:var(--panel-solid);color:var(--text);border-radius:8px;padding:.5rem .55rem;font:inherit;font-size:.75rem;cursor:pointer}.ar-presets button:hover,.ar-presets button.is-active{border-color:var(--accent);color:var(--accent)}
.ar-actions{display:grid;grid-template-columns:1fr;gap:.5rem}.ar-assumption{font-size:.76rem;color:var(--muted);border-top:1px solid var(--line);padding-top:.8rem}.ar-assumption strong{color:var(--text)}.ar-assumption p{margin:.3rem 0 0}
.ar-stage{display:grid;gap:1rem;min-width:0}.ar-metrics{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:.65rem}.ar-check-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:.65rem}.ar-metrics>div,.ar-check-grid>div{padding:.75rem;min-width:0}.ar-metrics span,.ar-check-grid span{display:block;font-size:.72rem;color:var(--muted)}.ar-metrics strong,.ar-check-grid strong{display:block;margin-top:.22rem;font-size:.84rem;overflow-wrap:anywhere;font-variant-numeric:tabular-nums}
.ar-top-grid{display:grid;grid-template-columns:minmax(0,1.08fr) minmax(0,.92fr);gap:1rem}.ar-panel{padding:.85rem;min-width:0}.ar-panel-head{display:flex;justify-content:space-between;gap:1rem;margin-bottom:.5rem}.ar-panel-head strong{display:block}.ar-readout{text-align:right}.ar-readout strong{display:block;color:var(--accent);font-size:.83rem}.ar-panel svg{display:block;width:100%;height:auto;overflow:visible}.ar-reading{padding:1rem}.ar-reading h3{margin:.35rem 0 .5rem}.ar-reading p{margin:0;color:var(--muted)}
.ar-svg-axis{stroke:var(--muted);stroke-width:1.5}.ar-svg-grid{stroke:var(--line);stroke-width:1}.ar-svg-guide{stroke:var(--accent-3);stroke-width:1.5;stroke-dasharray:5 6}.ar-svg-marker{stroke:var(--accent-2);stroke-width:2.5;stroke-dasharray:7 6}.ar-svg-label{fill:var(--text);font-size:17px;font-weight:700}.ar-svg-small{fill:var(--muted);font-size:14px}.ar-svg-violet{fill:var(--accent-2);font-size:15px;font-weight:700}.ar-svg-green{fill:var(--accent-3);font-size:15px;font-weight:700}.ar-svg-warm{fill:var(--warm);font-size:15px;font-weight:700}.ar-potential{fill:none;stroke:var(--accent);stroke-width:3}.ar-barrier-fill{fill:color-mix(in srgb,var(--accent-2) 15%,transparent)}.ar-energy{stroke:var(--accent-3);stroke-width:2.5;stroke-dasharray:8 6}.ar-nuclear-zone{fill:color-mix(in srgb,var(--warm) 14%,transparent)}.ar-parent{fill:color-mix(in srgb,var(--accent-2) 20%,var(--panel-solid));stroke:var(--accent-2);stroke-width:3}.ar-daughter{fill:color-mix(in srgb,var(--accent) 18%,var(--panel-solid));stroke:var(--accent);stroke-width:3}.ar-alpha{fill:color-mix(in srgb,var(--accent-3) 25%,var(--panel-solid));stroke:var(--accent-3);stroke-width:3}.ar-vector{stroke:var(--text);stroke-width:3;marker-end:url(#ar-arrow)}
@media(max-width:1180px){.ar-metrics{grid-template-columns:repeat(3,minmax(0,1fr))}.ar-top-grid{grid-template-columns:1fr}}
@media(max-width:980px){.ar-lab-shell,.ar-hero{grid-template-columns:1fr}.ar-controls{position:static}.ar-foundation-grid,.ar-boundary-grid{grid-template-columns:1fr}.ar-hero-copy :is(h1,h2){max-width:20ch}}
@media(max-width:640px){.ar-metrics,.ar-check-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.ar-panel{padding:.65rem}.ar-panel-head{display:grid}.ar-readout{text-align:left}.ar-controls{padding:.85rem}.ar-panel svg{aspect-ratio:1.42}.ar-note p{display:block;margin:.35rem 0 0}.ar-mini-grid{grid-template-columns:1fr}}
@media(max-width:380px){.ar-metrics,.ar-check-grid,.ar-presets div{grid-template-columns:1fr}.ar-control-head{display:grid}.ar-status{text-align:left;max-width:none}}
.ar-controls,.ar-stage,.ar-panel,.ar-metrics,.ar-top-grid,.ar-foundation-grid,.ar-boundary-grid,.ar-hero{min-width:0;max-width:100%}.ar-control-head>*{min-width:0}.ar-control-head strong,.ar-status{overflow-wrap:anywhere}.ar-assumption .mono{white-space:normal;overflow-wrap:anywhere}