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var(--line);padding-bottom:clamp(4rem,8vw,8rem)}.d3-lab{gap:1.25rem;padding-top:clamp(2rem,4vw,3.5rem);display:grid}.d3-lab__intro{justify-content:space-between;align-items:end;gap:2rem;display:flex}.d3-lab__intro h2{color:var(--accent-strong);letter-spacing:-.035em;margin:.15rem 0 .35rem;font-size:clamp(1.8rem,3vw,3rem);font-weight:400;line-height:1}.d3-lab__intro p{max-width:50rem;color:var(--muted);margin:0}.d3-lab__eyebrow{font-family:var(--font-mono);letter-spacing:.12em;text-transform:uppercase;font-size:.7rem;color:var(--accent-strong)!important}.d3-lab__stats{font-family:var(--font-mono);flex:none;gap:.5rem;font-size:.72rem;display:flex}.d3-lab__stats span{border:1px solid var(--line);border-radius:var(--radius-sm);min-width:5rem;color:var(--muted);text-align:center;padding:.65rem .8rem;display:grid}.d3-lab__stats strong{color:var(--text);font-size:.9rem}.d3-lab__scene-tabs{border:1px solid var(--line);border-radius:var(--radius-md);grid-template-columns:repeat(4,minmax(0,1fr));display:grid;overflow:hidden}.d3-lab button{appearance:none;border:1px solid var(--line);border-radius:var(--radius-pill);min-height:2.55rem;color:var(--muted);cursor:pointer;font:inherit;background:0 0;padding:.55rem .8rem;font-size:.86rem}.d3-lab button:hover,.d3-lab button.active{background:var(--accent-soft);border-color:color-mix(in srgb, var(--accent) 45%, var(--line));color:var(--accent-strong)}.d3-lab__scene-tabs button{border:0;border-right:1px solid var(--line);border-bottom:1px solid var(--line);text-align:left;border-radius:0;justify-content:flex-start;align-items:center;gap:.65rem;min-height:3.5rem;padding-inline:.9rem;display:flex}.d3-lab__scene-tabs button:nth-child(4n){border-right:0}.d3-lab__scene-tabs button:nth-child(n+5){border-bottom:0}.d3-lab__scene-tabs button span{color:var(--accent);font-family:var(--font-mono);font-size:.67rem}.d3-lab__toolbar{justify-content:space-between;align-items:center;gap:.8rem;min-width:0;display:flex}.d3-lab__toolbar-group{align-items:center;gap:.45rem;min-width:0;display:flex}.d3-lab__toolbar-group span{color:var(--muted);font-family:var(--font-mono);font-size:.72rem}.d3-lab__toolbar-group--scroll{scrollbar-width:thin;overflow-x:auto}.d3-lab__canvas-shell{border:1px solid var(--line);border-radius:var(--radius-lg);background:var(--surface-strong);width:100%;min-width:0;box-shadow:0 1.4rem 4rem color-mix(in srgb, var(--text) 8%, transparent);position:relative;overflow:hidden}.d3-lab canvas{touch-action:none;user-select:none;width:100%;max-width:100%;display:block}.d3-lab__canvas-badge{background:color-mix(in srgb, var(--surface-strong) 88%, transparent);border:1px solid var(--line);border-radius:var(--radius-pill);color:var(--muted);font-family:var(--font-mono);pointer-events:none;padding:.35rem .55rem;font-size:.62rem;position:absolute;bottom:.75rem;right:.75rem}.d3-lab__footer{color:var(--muted);font-family:var(--font-mono);justify-content:space-between;gap:1rem;font-size:.72rem;display:flex}.d3-lab__footer p{margin:0}.d3-lab__footer p:first-child{color:var(--text)}.d3-lab__feature-grid{border-top:1px solid var(--line);border-left:1px solid var(--line);grid-template-columns:repeat(4,minmax(0,1fr));margin-top:clamp(1rem,3vw,2.5rem);display:grid}.d3-lab__feature-grid article{border-right:1px solid var(--line);border-bottom:1px solid var(--line);min-width:0;padding:clamp(1rem,2.2vw,1.6rem)}.d3-lab__feature-grid span{color:var(--accent-strong);font-family:var(--font-mono);letter-spacing:.1em;text-transform:uppercase;font-size:.66rem}.d3-lab__feature-grid h3{margin:.5rem 0 .45rem;font-size:1.25rem;font-weight:400;line-height:1.1}.d3-lab__feature-grid p{color:var(--muted);margin:0;font-size:.9rem;line-height:1.55}@media (width<=68rem){.d3-page__heading,.d3-page__content{grid-column:1/-1}.d3-page__heading{padding-inline:1rem}.d3-lab__scene-tabs,.d3-lab__feature-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.d3-lab__scene-tabs button:nth-child(4n){border-right:1px solid var(--line)}.d3-lab__scene-tabs button:nth-child(2n){border-right:0}.d3-lab__scene-tabs button:nth-child(n+5){border-bottom:1px solid var(--line)}.d3-lab__scene-tabs button:nth-child(n+7){border-bottom:0}}@media (width<=46rem){.d3-lab__intro,.d3-lab__toolbar,.d3-lab__footer{flex-direction:column;align-items:stretch}.d3-lab__stats{grid-template-columns:repeat(3,minmax(0,1fr));display:grid}.d3-lab__stats span{min-width:0}.d3-lab__toolbar-group{flex-wrap:wrap}.d3-lab__feature-grid{grid-template-columns:1fr}}@media (width<=31rem){.d3-lab__scene-tabs{grid-template-columns:1fr}.d3-lab__scene-tabs button,.d3-lab__scene-tabs button:nth-child(2n),.d3-lab__scene-tabs button:nth-child(4n),.d3-lab__scene-tabs button:nth-child(n+5),.d3-lab__scene-tabs button:nth-child(n+7){border-right:0;border-bottom:1px solid var(--line)}.d3-lab__scene-tabs button:last-child{border-bottom:0}}@media (prefers-reduced-motion:reduce){.d3-lab button{transition:none}}