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var(--line);font-family:var(--sans);white-space:normal;opacity:0;pointer-events:none;z-index:5;padding:.4rem .55rem;font-size:.78rem;line-height:1.4;position:absolute;bottom:calc(100% + .55rem);left:0}.social:hover .social-tip,.social:focus-visible .social-tip{opacity:1}.close{max-width:34rem;margin:0}.colophon{border-top:1px solid var(--line);font-family:var(--mono);color:var(--muted);margin:2.5rem 0 0;padding-top:1rem;font-size:.75rem}section[id],.hero{scroll-margin-top:5.5rem}@media (width<=640px){.chapters h3{font-size:1.28rem}.chapters .ch-line{font-size:.9rem}}.horizon-scroll{height:480vh}.horizon-sticky{z-index:2;flex-direction:column;height:calc(100dvh - 5.5rem);padding-top:1.1rem;display:flex;position:sticky;top:5.5rem;overflow:hidden}.horizon-stage{flex:auto;min-height:200px;position:relative;overflow:hidden}.horizon-world{will-change:transform;position:absolute;top:0;left:0}.horizon-world svg{pointer-events:none;display:block;overflow:visible}.horizon-echo{fill:none;stroke:var(--echo);stroke-width:14px;stroke-linecap:round;stroke-linejoin:round}.horizon-draw{stroke-width:2.5px}.horizon-spur-track{fill:none;stroke:var(--spur);stroke-width:1.5px;stroke-dasharray:5 7;stroke-linecap:round;stroke-linejoin:round}.horizon-spur-draw{stroke:var(--mark);stroke-width:1.75px;stroke-linecap:round;stroke-linejoin:round}.horizon-spur-end{fill:none;stroke:var(--mark);stroke-width:1.5px}.horizon-thesis-track{fill:none;stroke:var(--track-strong);stroke-width:1.35px;stroke-linecap:round;stroke-linejoin:round}.horizon-thesis-draw{stroke:var(--mark);stroke-width:1.75px;stroke-linecap:round;stroke-linejoin:round}.static-split{grid-template-columns:1fr 1fr;gap:.75rem 1.35rem;display:grid}.static-split:before{display:none}.static-split>div{min-width:0;padding-top:.15rem;position:relative}.static-split>div:before{content:"";background:var(--mark);border-radius:999px;width:9px;height:9px;position:absolute;top:.45rem;left:-1.55rem}.horizon-labels li[data-lane=thesis]{text-align:center;width:9.5rem}.horizon-labels li[data-emphasis=side]{text-align:left;width:11rem;transform:translate(16px)}.horizon-labels li[data-emphasis=side] h3{font-size:1.05rem}.horizon-labels{margin:0;padding:0;list-style:none}.horizon-labels li{text-align:center;opacity:.36;width:10.5rem;transition:opacity .24s;position:absolute;transform:translate(-50%)}.horizon-labels h3{margin-top:.15rem;font-size:1.2rem}.horizon-labels li[data-state=reached]{opacity:.72}.horizon-labels li[data-state=active]{opacity:1}.ai-title,.horizon-labels li[data-emphasis=ai] h3{font-style:italic}.horizon-labels li[data-state=active] h3,.horizon-labels li[data-state=active] h3 .ph{color:var(--mark)}[data-theme=light] .horizon-labels li[data-state=active] h3,[data-theme=light] .chapters li[data-state=active] h3{color:var(--text)}[data-theme=light] .horizon-labels li[data-state=active] h3 .ph,[data-theme=light] .chapters li[data-state=active] h3 .ph{color:var(--ph)}.horizon-progress{background:var(--progress);height:2px;margin-bottom:.85rem}.horizon-progress span{background:var(--mark);width:0;height:100%;display:block}.horizon-caption{max-width:38rem;min-height:8.75rem;padding-bottom:1.1rem}.horizon-caption h3{font-size:clamp(1.55rem,3vw,2rem)}@media (width<=640px){.static-journey{grid-template-columns:minmax(0,1fr) minmax(7.75rem,9.25rem);column-gap:.75rem}.static-spur{padding-left:.65rem}.static-spur-card h3{font-size:1.05rem}.horizon-scroll{height:520vh}.horizon-labels li{width:9.2rem}.horizon-labels h3{font-size:1.05rem}.horizon-caption{min-height:9.5rem}.static-split{grid-template-columns:1fr;gap:1.1rem}}@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,:before,:after{transition:none!important;animation:none!important}.traveler{display:none!important}.draw,.spur-draw,.horizon-spur-draw,.horizon-thesis-draw{stroke-dashoffset:0!important}}@property --tw-rotate-x{syntax:"*";inherits:false}@property --tw-rotate-y{syntax:"*";inherits:false}@property --tw-rotate-z{syntax:"*";inherits:false}@property --tw-skew-x{syntax:"*";inherits:false}@property --tw-skew-y{syntax:"*";inherits:false}@property --tw-border-style{syntax:"*";inherits:false;initial-value:solid}@property --tw-font-weight{syntax:"*";inherits:false}@property --tw-ordinal{syntax:"*";inherits:false}@property --tw-slashed-zero{syntax:"*";inherits:false}@property --tw-numeric-figure{syntax:"*";inherits:false}@property --tw-numeric-spacing{syntax:"*";inherits:false}@property --tw-numeric-fraction{syntax:"*";inherits:false}@property --tw-outline-style{syntax:"*";inherits:false;initial-value:solid}@property 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