/* Families are primary navigation; principles and algorithm relationships cross them. */
.semantic-control{display:flex;align-items:center;gap:30px;border:1px solid var(--line);background:var(--panel);border-radius:9px;padding:20px 24px;margin:24px 0}.semantic-control>div:first-child{min-width:165px}.semantic-control .eyebrow{display:block;margin:0 0 6px}.semantic-control strong{display:block;font-size:15px;font-weight:550}.semantic-scale{flex:1;max-width:500px;min-width:0}.semantic-scale input{display:block;width:calc(100% - 20px);margin:2px 10px 8px;accent-color:var(--ink);cursor:pointer}.semantic-stops{display:flex;justify-content:space-between;gap:8px}.semantic-stops button{border:0;padding:5px 0;font-size:11px;color:var(--mut);text-align:center}.semantic-stops button[aria-pressed=true]{color:var(--ink);font-weight:650}.semantic-caption{margin-left:auto;font-size:11px;color:var(--mut);line-height:1.65;text-align:right}.semantic-card.family{border-radius:9px}.semantic-card.family h3{font-size:22px}.semantic-card p{display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}.semantic-card.variant{border-left:2px solid var(--connection)}.semantic-card .card-bottom{font-size:11px;gap:14px}.semantic-browse-content{animation:semantic-appear .4s ease}.semantic-atlas{display:grid;grid-template-columns:minmax(0,1fr) 270px;gap:26px;align-items:start}.semantic-map{border:1px solid var(--line);border-radius:10px;overflow:hidden;background:var(--panel);min-width:0}.semantic-map-toolbar{display:flex;gap:15px;align-items:center;padding:12px 16px;border-bottom:1px solid var(--line);font-size:11px;color:var(--mut)}.semantic-map-toolbar>span{font-weight:550;color:var(--ink)}.semantic-map-toolbar label{display:flex;align-items:center;gap:5px}.semantic-map-toolbar input{accent-color:var(--ink)}.semantic-map-toolbar>div{margin-left:auto;display:flex;gap:4px}.semantic-map-toolbar button{padding:5px 10px;font-size:11px}.semantic-viewport{height:640px;overflow:auto;overscroll-behavior:contain;scrollbar-width:thin;scrollbar-color:var(--line) transparent;background:radial-gradient(circle,var(--line) .65px,transparent .8px);background-size:18px 18px;cursor:grab;touch-action:pan-x pan-y}.semantic-viewport.panning{cursor:grabbing}.semantic-svg{display:block;isolation:isolate;max-width:none}.semantic-bands text{fill:var(--mut);font:10px system-ui;letter-spacing:.05em}.semantic-bands .semantic-family-caption{font-size:11px;letter-spacing:0}.semantic-node{cursor:pointer;transition:transform .62s cubic-bezier(.2,.8,.2,1),opacity .4s ease;outline:none}.semantic-node rect{fill:var(--panel);fill-opacity:.86;stroke:var(--line);stroke-width:1.1}.semantic-node text{font:12px system-ui;fill:var(--ink);pointer-events:none}.semantic-node .approach-c{fill:var(--classical)}.semantic-node .approach-q{fill:var(--quantum)}.semantic-node .approach-h,.semantic-node .approach-mixed{fill:var(--connection)}.semantic-node .family-dot{fill:var(--mut2)}.semantic-node.variant rect{stroke-dasharray:3 3;fill-opacity:.77}.semantic-node.variant text{font-size:11.5px}.semantic-node.connected rect{stroke:var(--connection);stroke-width:1.4}.semantic-node[aria-pressed=true] rect,.semantic-node:focus-visible rect{stroke:var(--ink);stroke-width:2;fill:var(--soft);fill-opacity:.93}.semantic-node:hover rect{stroke:var(--ink)}.semantic-edge{pointer-events:none;animation:semantic-appear .35s ease}.semantic-edge path{fill:none;stroke:var(--connection);stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}.semantic-edge .edge-halo{stroke:var(--panel);stroke-width:5;opacity:.8}.semantic-edge.quiet{opacity:.19}.semantic-edge.active path:not(.edge-halo){stroke:var(--ink);stroke-width:1.8}.semantic-map-caption{display:flex;justify-content:space-between;gap:16px;padding:13px 16px;border-top:1px solid var(--line);font-size:10px;color:var(--mut);line-height:1.6}.semantic-map-caption>span:last-child{white-space:nowrap}.semantic-detail{position:sticky;top:20px;padding:18px 0;min-width:0}.semantic-detail h2{font-size:26px;line-height:1.15;margin:10px 0 16px}.semantic-detail p{font-size:13px;color:var(--mut);line-height:1.75}.semantic-detail .button,.semantic-detail .text-link{font-size:12px;margin:6px 0 12px;display:inline-flex}.semantic-detail .family-back{display:block;font-size:11px;color:var(--mut);text-decoration:underline;margin:16px 0}.semantic-detail h3{border-top:1px solid var(--line);padding-top:22px;margin-top:22px;font-size:13px}.semantic-neighbours{max-height:350px;overflow:auto;scrollbar-width:thin}.semantic-neighbours button{display:block;border:0;border-bottom:1px solid var(--line);border-radius:0;text-align:left;width:100%;padding:13px 0;font-size:12px}.semantic-neighbours small{display:block;color:var(--mut);font-size:11px;line-height:1.6;margin-top:6px}.semantic-citations a{display:block;font-size:11px;text-decoration:underline;line-height:1.7;margin:9px 0}.semantic-limitation{border-left:2px solid var(--line);padding-left:12px}.semantic-mobile-selection{display:none}.family-members{margin-top:30px}.family-context{display:flex;justify-content:space-between;align-items:center;gap:16px;border-bottom:1px solid var(--line);padding-bottom:14px;margin-bottom:20px}.family-context h2{margin:0}.variant-kind{font-size:11px;color:var(--mut);text-transform:uppercase;letter-spacing:.06em}.variant-content{max-width:760px}.variant-content .lede{font-size:19px}.variant-refs .refs{margin-top:22px}.semantic-description{max-width:760px}.semantic-description p{font-size:14px;color:var(--mut)}.taxonomy-note{font-size:12px;color:var(--mut);margin:20px 0;max-width:780px;line-height:1.75}.family-list-link{display:block;font-size:12px;color:var(--mut);margin:15px 0}.semantic-detail h2:focus{outline:none}.dot.mixed{background:linear-gradient(90deg,var(--quantum) 0 50%,var(--classical) 50% 100%)}
@keyframes semantic-appear{from{opacity:0}to{opacity:1}}
@media(max-width:1000px){.semantic-atlas{grid-template-columns:minmax(0,1fr) 230px;gap:20px}.semantic-control{gap:20px}.semantic-caption{display:none}.semantic-map-toolbar{flex-wrap:wrap;gap:8px}.semantic-map-caption{flex-direction:column;gap:5px}}
@media(max-width:750px){.semantic-atlas{display:block}.semantic-detail{position:static}.semantic-viewport{height:55dvh;min-height:330px;max-height:600px}.semantic-mobile-selection{display:flex;align-items:center;justify-content:space-between;gap:15px;padding:14px;border-top:1px solid var(--line);font-size:12px}.semantic-mobile-selection button{border:0;padding:5px 0;text-decoration:underline;font-size:11px;flex-shrink:0}.semantic-control{flex-direction:column;align-items:stretch;padding:17px;gap:16px}.semantic-control>div:first-child{display:flex;align-items:center;justify-content:space-between;gap:12px}.semantic-control .eyebrow{margin:0;font-size:9px}.semantic-control strong{font-size:13px}.semantic-scale{max-width:none}.semantic-stops button{font-size:10px;min-height:28px}.semantic-scale input{min-height:25px}.semantic-map-toolbar>span{display:none}.semantic-detail h2{font-size:28px}.family-context{align-items:flex-start;flex-direction:column}}
@media(prefers-reduced-motion:reduce){.semantic-node,.semantic-edge,.semantic-browse-content{transition:none;animation:none}}
.semantic-node text{font-size:13.5px}.semantic-node.variant text{font-size:12.5px}.semantic-detail>.button,.semantic-detail>.text-link{display:flex;width:fit-content;max-width:100%;line-height:1.5}.semantic-detail>.button{margin-bottom:14px}
.semantic-ghost{pointer-events:none}
.semantic-node .approach-h,.semantic-node .approach-mixed{fill:url(#semantic-hybrid)}
/* Position and opacity follow the slider directly; CSS easing would trail the hand. */
.semantic-node{transition:none;will-change:transform,opacity}
.semantic-edge{animation:none}
.semantic-preview{pointer-events:none}
.semantic-node.equation rect{stroke:var(--connection);stroke-opacity:.65;fill:var(--panel);fill-opacity:.96}
.semantic-node.equation text{font-weight:550}
.semantic-node-equation{font-size:11px;line-height:1.35;color:var(--ink);text-align:center;pointer-events:none}
.semantic-node-equation>div+div{margin-top:3px}
.semantic-node foreignObject{pointer-events:none;overflow:visible}
.semantic-node-equation mjx-container{margin:0!important;max-width:100%}
.semantic-equations{font-size:14px;color:var(--ink);display:flex;flex-direction:column;gap:8px;margin:14px 0;overflow-x:auto}
.semantic-detail-equations{font-size:15px;display:grid;gap:8px;padding:12px 0;overflow-x:auto}
.semantic-bridges,.semantic-glows,.semantic-bursts{pointer-events:none}
.semantic-bridges path{fill:none;stroke:var(--connection);stroke-width:1.3;stroke-dasharray:3 5}
.semantic-flare{filter:drop-shadow(0 0 5px var(--connection))}
.semantic-flare rect{fill:none;stroke:var(--connection);stroke-width:2}
.semantic-control .semantic-scale input{height:28px;min-height:28px}
.semantic-stops{display:grid;grid-auto-flow:column;grid-auto-columns:1fr;gap:8px}
.semantic-stops button{min-height:40px;line-height:1.3;border-radius:6px;padding:5px 6px;transition:color .2s ease,background .2s ease}
.semantic-stops button[aria-pressed=true]{background:var(--soft)}
/* Match the range's physical direction while keeping Arabic labels readable. */
html[dir=rtl] .semantic-stops{direction:ltr}
html[dir=rtl] .semantic-stops button{direction:rtl}
.semantic-control:focus-within{border-color:var(--mut2)}
@media(max-width:750px){
 .semantic-control{padding:14px;gap:10px}
 .semantic-scale input{margin-bottom:3px}
 .semantic-stops{gap:3px}
 .semantic-stops button{font-size:10px;padding:4px 2px;min-height:40px;overflow-wrap:anywhere}
 .semantic-control .semantic-caption{display:block;text-align:start;margin:0;font-size:10px}
 .semantic-control .semantic-caption br{display:none}
 .semantic-viewport{height:56svh;min-height:310px}
 .semantic-map-caption>span:first-child{max-width:100%}
}
@media(prefers-reduced-motion:reduce){
 .semantic-bridges,.semantic-glows,.semantic-bursts{display:none}
 .semantic-stops button{transition:none}
}
/* Keep the detail gesture beside the map while the page scrolls. */
#atlas-semantic-control{position:sticky;top:10px;z-index:20}
#atlas-semantic-control .semantic-control{margin:0 0 14px;background:var(--panel);box-shadow:0 5px 18px #00000005}
.semantic-viewport{height:clamp(340px,calc(100svh - 245px),640px)}
@media(max-width:750px){
 #atlas-semantic-control{top:6px}
 #atlas-semantic-control .semantic-control{padding:10px 12px;margin-bottom:10px}
 #atlas-semantic-control .semantic-control>div:first-child,#atlas-semantic-control .semantic-caption{display:none}
 .semantic-viewport{height:clamp(160px,calc(100svh - 235px),560px);min-height:160px}
}
@media(max-height:500px){
 #atlas-semantic-control .semantic-control{padding:8px 12px}
 #atlas-semantic-control .semantic-control>div:first-child,#atlas-semantic-control .semantic-caption{display:none}
 .semantic-viewport{height:calc(100svh - 190px);min-height:150px}
 .semantic-map-caption{display:none}
}