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line{vector-effect:non-scaling-stroke}.module-center,.module-node{border:1px solid var(--line);background:var(--bg);text-align:center;border-radius:8px;width:172px;padding:14px 16px;position:absolute;transform:translate(-50%,-50%)}.module-center{background:var(--soft);border-color:var(--accent);color:var(--accent);font-weight:650;top:49%;left:50%}.module-node{left:var(--x);top:var(--y)}.visually-hidden{clip-path:inset(50%);white-space:nowrap;width:1px;height:1px;padding:0;position:absolute;overflow:hidden}.keyboard-progression{grid-template-columns:minmax(0,1fr) 24px minmax(0,1fr) 24px minmax(0,1fr);align-items:center;gap:12px;display:grid}.keyboard-stage{min-width:0}.keyboard-stage h4{min-height:3em;margin-bottom:0}.keyboard-stage svg{width:100%;color:var(--ink);display:block}.article-body .stage-annotation{color:var(--muted);margin:16px 0 0;font-size:.9rem}.progression-arrow{color:var(--accent);font-size:1.5rem}.product-surface{fill:var(--soft)}.technical-guide{stroke:var(--muted)}.interface-illustration{max-width:720px;margin-inline:auto}.interface-illustration>svg{width:100%;color:var(--ink);display:block}.interface-leaders{stroke:var(--muted)}.interface-contacts{stroke:var(--accent);stroke-width:2px}.callout-marker{fill:var(--surface);stroke:var(--accent)}.interface-illustration text{font-family:inherit;font-size:15px}.interface-product-labels{color:var(--muted);justify-content:space-around;font-size:.9rem;display:flex}.interface-callouts{grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;margin:28px 0 0;display:grid}.interface-callouts dt{align-items:baseline;gap:8px;font-weight:650;display:flex}.callout-number{color:var(--accent);font-weight:650}.interface-callouts dd{color:var(--muted);margin:6px 0 0 17px}@media (width<=820px){.keyboard-progression{grid-template-columns:1fr;gap:18px}.keyboard-stage{width:100%;max-width:340px;margin-inline:auto}.keyboard-stage h4{min-height:0}.keyboard-stage svg{max-height:180px}.progression-arrow{justify-self:center;transform:rotate(90deg)}.interface-callouts{grid-template-columns:repeat(2,minmax(0,1fr))}}@media (width<=480px){.interface-illustration>svg{height:190px}.interface-illustration text{font-size:42px}.callout-marker{r:28px}.interface-callouts{grid-template-columns:1fr;gap:18px}}@media (width<=820px){.longform{padding-block:48px 72px}.article-header{margin-bottom:44px}.article-body{font-size:1.05rem}.article-body h2{margin-top:56px}.system-comparison{grid-template-columns:1fr;gap:22px}.system-arrow{transform:rotate(90deg)}.module-network{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;height:auto;display:grid}.network-lines{display:none}.module-center,.module-node{width:auto;padding:12px;position:relative;top:auto;left:auto;transform:none}.module-center{grid-column:1/-1}.module-node{border-top:2px solid var(--accent)}}@media (width<=380px){.module-network{grid-template-columns:1fr}.integrated-system{padding:12px}.article-header h1{font-size:2rem;line-height:1.1}.article-header time{white-space:nowrap;display:inline-block}}