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button.is-active{color:var(--physics-accent);font-weight:650}.physics-workbench__layout{grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:14px;display:grid}.physics-workbench__layout--wide-left{grid-template-columns:minmax(0,1.2fr) minmax(280px,.8fr)}.physics-workbench__layout--equal{grid-template-columns:repeat(2,minmax(0,1fr))}.physics-workbench__stack{gap:14px;display:grid}.physics-workbench__card{border:1px solid var(--physics-line);background:var(--physics-panel);border-radius:15px;min-width:0;padding:18px}.physics-workbench__card hr{border:0;border-top:1px solid var(--physics-line);margin:22px 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8px;font-style:normal;display:grid}.physics-workbench__presets{flex-wrap:wrap;justify-content:flex-end;align-items:center;gap:5px;max-width:270px;display:flex}.physics-workbench__presets span{width:100%;color:var(--physics-muted);text-align:right;font-size:11px}.physics-workbench__presets button,.physics-workbench__preset-row button{padding:4px 8px;font-size:12px}.physics-workbench__preset-row{flex-wrap:wrap;gap:6px;margin-top:12px;display:flex}.physics-workbench__formula{color:var(--physics-accent);background:var(--physics-accent-bg);text-align:center;border-radius:10px;margin-top:16px;padding:11px 13px;font-family:Georgia,Times New Roman,serif}.physics-workbench__result-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:9px;margin-top:14px;display:grid}.physics-workbench__result{border:1px solid var(--physics-line);background:var(--physics-panel-2);border-radius:11px;min-width:0;padding:12px}.physics-workbench__result>span{color:var(--physics-muted);font-size:12px;display:block}.physics-workbench__result strong{overflow-wrap:anywhere;margin-top:3px;font-size:clamp(17px,2vw,23px);line-height:1.18;display:block}.physics-workbench__result strong small{color:var(--physics-muted);font-size:12px;font-weight:500}.physics-workbench__result p{color:var(--physics-muted);margin:4px 0 0;font-size:12px}.physics-workbench__error{background:#b445451f;border:1px solid #b44545;border-radius:10px;margin-top:14px;padding:12px}.physics-workbench__help{color:var(--physics-muted);margin:13px 0 0;font-size:12px}.physics-workbench__collision-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;margin-top:14px;display:grid}.physics-workbench__collision-grid fieldset{border:1px solid var(--physics-line);border-radius:11px;min-width:0;margin:0;padding:12px}.physics-workbench__collision-grid legend{color:var(--physics-muted);padding:0 5px;font-size:12px}.physics-workbench__collision-grid .physics-workbench__field+.physics-workbench__field{margin-top:9px}.physics-workbench__visual-card{padding-bottom:12px}.physics-workbench__canvas-wrap{border:1px solid var(--physics-line);background:color-mix(in srgb, var(--bg) 82%, #0c1422);border-radius:12px;width:100%;height:330px;overflow:hidden}.physics-workbench__canvas-wrap--compact{height:265px}.physics-workbench canvas{width:100%;height:100%;display:block}.physics-workbench__energy-bars{gap:8px;margin-top:15px;display:grid}.physics-workbench__energy-bars>div{grid-template-columns:68px minmax(0,1fr) 90px;align-items:center;gap:8px;font-size:12px;display:grid}.physics-workbench__energy-bars strong{text-align:right;font-variant-numeric:tabular-nums}.physics-workbench__bar{background:var(--physics-panel-2);border-radius:5px;height:10px;overflow:hidden}.physics-workbench__bar i{border-radius:inherit;background:var(--physics-accent);height:100%;display:block}@media (width<=820px){.physics-workbench__layout,.physics-workbench__layout--wide-left,.physics-workbench__layout--equal{grid-template-columns:1fr}.physics-workbench__intro{display:grid}.physics-workbench__unit-note{width:max-content}}@media (width<=540px){.physics-workbench__intro,.physics-workbench__card{padding:14px}.physics-workbench__form-grid,.physics-workbench__result-grid,.physics-workbench__collision-grid{grid-template-columns:1fr}.physics-workbench__section-head{display:grid}.physics-workbench__presets{justify-content:flex-start;max-width:none}.physics-workbench__presets span{text-align:left}.physics-workbench__canvas-wrap{height:260px}.physics-workbench__energy-bars>div{grid-template-columns:60px minmax(0,1fr)}.physics-workbench__energy-bars strong{text-align:left;grid-column:2}}.physics-workbench__legend{color:var(--physics-muted);flex-wrap:wrap;gap:12px;margin-top:10px;font-size:12px;display:flex}.physics-workbench__legend span{align-items:center;gap:6px;display:inline-flex}.physics-workbench__legend i{background:var(--physics-muted);border-radius:2px;width:18px;height:3px}.physics-workbench__legend i.is-accent{background:var(--physics-accent)}.physics-workbench__legend i.is-ink{background:var(--physics-ink)}.physics-workbench__legend i.is-muted{background:var(--physics-muted)}.physics-workbench__model-info{border:1px solid var(--physics-line);border-left:3px solid var(--physics-accent);background:var(--physics-panel-2);border-radius:10px;margin-top:13px;padding:12px 13px}.physics-workbench__model-info strong{color:var(--physics-accent)}.physics-workbench__model-info p{color:var(--physics-muted);margin:5px 0 0;font-size:13px}.physics-workbench__model-info ul{color:var(--physics-muted);margin:8px 0 0;padding-left:19px;font-size:12px}.physics-workbench__model-info li+li{margin-top:3px}.physics-workbench{--physics-label-bg:color-mix(in srgb, var(--panel) 96%, var(--bg))}.physics-workbench__view-controls{flex-wrap:wrap;justify-content:flex-end;gap:6px;display:flex}.physics-workbench__view-controls button{min-width:36px;padding:5px 9px;font-size:12px}.physics-workbench__canvas-wrap--force{height:390px}.physics-workbench canvas[aria-label*=free-body]{cursor:grab;touch-action:none}.physics-workbench canvas[aria-label*=free-body].is-interacting{cursor:grabbing}@media (width<=540px){.physics-workbench__visual-head{display:grid}.physics-workbench__view-controls{justify-content:flex-start}.physics-workbench__canvas-wrap--force{height:330px}}.physics-workbench__safety-notice{border:1px solid color-mix(in srgb, var(--physics-accent) 50%, var(--physics-line));color:var(--physics-ink);background:color-mix(in srgb, var(--physics-accent) 10%, 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