.museum-grid{display:grid;grid-template-columns:200px 1fr;gap:2.5rem;align-items:start}.museum-timeline{position:sticky;top:6rem}.museum-timeline ol{list-style:none;margin:0;padding:0;border-left:1px solid var(--border)}.timeline-node{display:flex;width:100%;align-items:center;gap:.6rem;margin-left:-1px;padding:.6rem 0 .6rem 1rem;border:none;border-left:2px solid transparent;background:none;color:var(--fg-muted);text-align:left;cursor:pointer;transition:color .2s ease,border-color .2s ease}.timeline-node:hover{color:var(--fg)}.timeline-node.is-active{border-left-color:var(--accent);color:var(--accent)}.timeline-dot{width:8px;height:8px;flex-shrink:0;border-radius:50%;background:var(--border);transition:background-color .2s ease}.timeline-node.is-active .timeline-dot{background:var(--accent)}.timeline-label{display:flex;flex-direction:column;line-height:1.3}.timeline-year{font-size:.7rem;color:var(--fg-muted)}.timeline-name{font-size:.9rem;font-weight:500}.museum-panel-wrap{position:relative;min-height:420px}.chip-panel{position:absolute;inset:0;opacity:0;visibility:hidden;transform:translateY(8px);transition:opacity .25s ease,transform .25s ease,visibility .25s ease}.chip-panel.is-active{position:relative;opacity:1;visibility:visible;transform:translateY(0)}.chip-panel h2{margin:0;font-size:1.25rem;font-weight:600}.panel-header{display:flex;align-items:flex-start;justify-content:space-between;gap:1rem}.panel-sub{margin:.3rem 0 0;font-size:.85rem;color:var(--fg-muted)}.vendor-tags{display:flex;flex-wrap:wrap;justify-content:flex-end;gap:.4rem}.vendor-tag{display:inline-flex;align-items:center;padding:.2rem .65rem;border-radius:999px;font-size:.72rem;font-weight:500;line-height:1.6;white-space:nowrap}.vendor-tag[data-vendor=IBM]{background:#dee4ed;color:#3a5478}.vendor-tag[data-vendor=Motorola]{background:#ede4de;color:#7d5336}.vendor-tag[data-vendor=Freescale]{background:#d9e8e4;color:#32675a}.vendor-tag[data-vendor=Nintendo]{background:#eddee1;color:#883a47}.vendor-tag[data-vendor=Microsoft]{background:#d9e8de;color:#326744}.vendor-tag[data-vendor=Sony]{background:#e1dfec;color:#4e428a}.vendor-tag[data-vendor=Toshiba]{background:#eae5d7;color:#726231}[data-theme=dark] .vendor-tag[data-vendor=IBM]{background:#313b49;color:#b3c4db}[data-theme=dark] .vendor-tag[data-vendor=Motorola]{background:#493b31;color:#d9bba6}[data-theme=dark] .vendor-tag[data-vendor=Freescale]{background:#2e423d;color:#9fd1c4}[data-theme=dark] .vendor-tag[data-vendor=Nintendo]{background:#493135;color:#ddb0b8}[data-theme=dark] .vendor-tag[data-vendor=Microsoft]{background:#2e4235;color:#9fd1af}[data-theme=dark] .vendor-tag[data-vendor=Sony]{background:#363248;color:#bab3db}[data-theme=dark] .vendor-tag[data-vendor=Toshiba]{background:#433e2d;color:#d4c69b}.panel-section{margin-top:1.5rem}.panel-section h3{margin:0 0 .6rem;font-size:.8rem;font-weight:600;letter-spacing:.04em;text-transform:uppercase;color:var(--fg-muted)}.spec-list{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:.75rem;margin:0}.spec-list dt{font-size:.75rem;color:var(--fg-muted)}.spec-list dd{margin:0;font-size:.95rem}.variant-groups{display:flex;flex-direction:column;gap:.9rem}.variant-group-label{margin:0 0 .4rem;font-size:.72rem;font-weight:600;color:var(--fg-muted)}.variant-row{display:flex;flex-wrap:wrap;gap:.6rem}.variant-card{display:flex;flex-direction:column;gap:.15rem;padding:.45rem .75rem;border:1px solid var(--border);border-radius:8px;background:none;font-family:inherit;text-align:left;cursor:pointer;transition:border-color .2s ease,background-color .2s ease}.variant-card:hover{border-color:var(--accent)}.variant-card.is-active{border-color:var(--accent);background:color-mix(in srgb,var(--accent) 10%,transparent)}.variant-card.is-active .variant-name{color:var(--accent)}.variant-name{font-size:.85rem;font-weight:600}.variant-meta{font-size:.72rem;color:var(--fg-muted)}.diagram-placeholder{border:1px dashed var(--border);border-radius:8px;padding:2rem;text-align:center;font-size:.85rem;color:var(--fg-muted)}.feature-tags{display:flex;flex-wrap:wrap;gap:.5rem}.feature-tag{border:1px solid var(--border);border-radius:999px;padding:.25rem .7rem;font-size:.78rem;color:var(--fg-muted)}@media(max-width:768px){.museum-grid{grid-template-columns:1fr}.museum-timeline{position:static}}