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14px),calc(100% - 10px);background-repeat:no-repeat;background-size:4px 4px}.spring-field input:focus,.spring-field select:focus{border-color:var(--glow)}.spring-field input[aria-invalid=true]{border-color:#f59b9b}.spring-range{grid-template-columns:8rem 1fr 4.5rem;align-items:center;gap:1rem;min-height:2.8rem;display:grid}.spring-range input[type=range]{width:100%;accent-color:var(--glow)}.spring-range output{color:var(--ink);text-align:right;font:400 .64rem/1 DM Mono,monospace}.spring-toggle{color:var(--ink);letter-spacing:.06em;text-transform:uppercase;align-items:center;gap:.7rem;font:400 .68rem/1.4 DM Mono,monospace;display:inline-flex}.spring-toggle input{width:1rem;height:1rem;accent-color:var(--glow);margin:0}.spring-control-body>.spring-toggle{margin-top:.9rem}.spring-move-grid{grid-template-columns:1fr 1fr;gap:.8rem;display:grid}.spring-move{border:1px solid var(--line);min-width:0;margin:0;padding:1rem}.spring-move legend{padding:0 .4rem}.spring-move p{min-height:2.8em;color:var(--muted);margin:.4rem 0 1rem;font-size:.78rem;line-height:1.45}.spring-move .spring-button{margin-top:.85rem}.spring-range-compact{grid-template-columns:4.5rem 1fr 3rem;gap:.5rem;margin-top:.75rem}.spring-button{border:1px solid var(--line);min-height:2.55rem;color:var(--ink);cursor:pointer;letter-spacing:.1em;text-transform:uppercase;background:#08111bc7;border-radius:0;padding:.72rem .9rem;font:400 .61rem/1 DM Mono,monospace;transition:border-color .2s,background .2s,color .2s}.spring-button:hover,.spring-button:focus-visible{border-color:var(--glow);outline:none}.spring-button-primary{border-color:var(--glow);background:var(--ink);color:var(--void)}.spring-button-primary:hover,.spring-button-primary:focus-visible{background:var(--glow)}.spring-button-danger{color:#dda3a3}.spring-button:disabled{cursor:not-allowed;opacity:.35}@media (width<=980px){.spring-page-intro{grid-template-columns:1fr 2fr}.spring-page-intro>p:last-child{grid-column:2}.spring-balls{grid-template-columns:1fr}.spring-stage-column{width:min(100%,680px);margin-inline:auto;position:relative;top:auto}}@media (width<=620px){.spring-page{padding-top:2rem}.spring-page>.back-link{margin-bottom:7rem}.spring-page-intro{grid-template-columns:1fr;gap:1.5rem}.spring-page-intro .eyebrow,.spring-page-intro>p:last-child{grid-column:auto}.spring-page-intro h1{font-size:clamp(3.6rem,18vw,6rem)}.spring-balls{gap:4.5rem}.spring-transport .spring-button{flex:calc(50% - .65rem)}.spring-panel-heading,.spring-save-row{grid-template-columns:1fr}.spring-save-row .spring-button{width:100%}.spring-move-grid{grid-template-columns:1fr}.spring-range{grid-template-columns:6.5rem 1fr 4rem;gap:.6rem}.spring-control-group summary span:last-child{display:none}.spring-preset-panel{padding:1rem}}@media (prefers-reduced-motion:reduce){.spring-anchors circle,.spring-button{transition:none}}