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2);top:22px;display:flex;align-items:center;gap:10px;min-height:44px;background:var(--accent);color:var(--on-accent);border:1px solid transparent;border-radius:var(--radius-control);padding:10px 14px;font-size:14px;line-height:1.25;transition:background var(--ui-fast)}.back:hover:not(:disabled){background:var(--accent-hover)}.back kbd{font:inherit;font-size:12px;border-left:1px solid #1a030933;padding-left:9px;margin-left:8px}.back:disabled{opacity:.6}.detail-copy{position:absolute;z-index:4;right:calc((100% - var(--scene-width)) / 2 + 26px);top:114px;width:calc(var(--scene-width) * .3);max-width:380px;max-height:calc(var(--scene-height) - 52px);overflow-y:auto;scrollbar-width:thin;scrollbar-color:var(--line-strong) transparent;opacity:0;pointer-events:none;transform:translateY(15px);transition:opacity .65s,transform .8s}.detail-copy.shown{opacity:1;transform:translateY(0);pointer-events:auto}.detail-copy h2{font-family:var(--font-display);font-size:clamp(34px,3.1vw,52px);line-height:.95;letter-spacing:-.02em;font-weight:500;margin:0 0 24px}.detail-copy h2 span{display:block}.system-description{font-size:15px;line-height:1.4;color:var(--muted);margin:0 0 22px}.part-list{border-top:1px solid var(--line)}.part-list button{display:block;width:100%;min-height:48px;border:0;border-bottom:1px solid var(--line);background:transparent;padding:14px 0;text-align:left;font-size:15px;line-height:1.35;transition:color var(--ui-fast)}.part-list button:hover,.part-list button.selected{color:var(--accent)}.part-row{display:flex;align-items:center;gap:12px}.part-row small{font-size:12px;color:var(--accent);font-variant-numeric:tabular-nums}.part-row svg{margin-left:auto;flex-shrink:0;transition:transform var(--ui-enter)}.part-list button.selected svg{transform:rotate(45deg)}.part-description{display:block;font-size:14px;line-height:1.4;color:var(--muted);padding:10px 0 1px 26px}.benefit{margin-top:22px;padding:14px 16px;border-left:2px solid var(--accent);background:var(--accent-soft);border-radius:0 10px 10px 0}.benefit>span{font-size:11px;color:var(--accent);text-transform:uppercase;letter-spacing:.14em}.benefit p{font-size:14px;line-height:1.4;margin:6px 0}.annotation{position:absolute;z-index:3;border:0;background:transparent;display:flex;align-items:center;gap:9px;transform:translate(-50%,-50%);padding:8px;min-width:44px;min-height:44px;border-radius:50%}.annotation>span:first-child{font-weight:500;box-shadow:0 0 0 4px var(--accent-soft);width:28px;height:28px;background:var(--accent);color:var(--on-accent);border-radius:50%;display:grid;place-items:center;font-size:12px}.annotation.open>span:first-child{box-shadow:0 0 0 4px var(--accent-ring)}.annotation-label{font-size:14px;line-height:1.25;color:var(--on-accent);background:var(--accent);border-radius:var(--radius-control);padding:10px 12px;white-space:nowrap;opacity:0;transition:opacity var(--ui-fast);position:absolute;bottom:100%;left:0;pointer-events:none}.annotation:hover .annotation-label,.annotation:focus-visible .annotation-label,.annotation.open .annotation-label{opacity:1}.transition-status{position:absolute;bottom:20px;left:50%;transform:translate(-50%);font-size:14px;display:flex;align-items:center;gap:10px;color:var(--muted);white-space:nowrap}.small-dot{width:5px;height:5px;border-radius:50%;background:var(--accent);display:inline-block;flex-shrink:0}.scene-footer{height:164px;flex-shrink:0;width:var(--scene-width,calc(100% - 2 * var(--gutter)));margin:0 auto;display:flex;flex-direction:column;justify-content:space-between;padding:24px 0 14px;color:var(--muted)}.feature-notes{counter-reset:note;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:24px;transition:opacity var(--ui-fast)}.feature-note{counter-increment:note}.feature-note h3:before{content:"0" counter(note);font-family:Manrope,sans-serif;font-size:11px;letter-spacing:.1em;color:var(--accent);margin-right:10px;vertical-align:2px}.feature-note h3{font-family:var(--font-display);font-size:16px;line-height:1.2;font-weight:500;color:var(--ink);margin:0 0 9px}.feature-note p{font-size:14px;line-height:1.4;margin:0;max-width:27ch}.footer-baseline{display:flex;justify-content:space-between;gap:16px;padding-top:15px;border-top:1px solid var(--line);font-size:11px;text-transform:uppercase;letter-spacing:.12em;line-height:1.35}.experience:has(.appearance-hotspot.expanded) .feature-notes{opacity:0;visibility:hidden}.experience:has(.appearance-hotspot.expanded) .footer-baseline{visibility:hidden}.error-message{position:fixed;bottom:20px;left:50%;transform:translate(-50%);z-index:10;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-panel);color:var(--ink);padding:12px 16px;display:flex;align-items:center;gap:16px;font-size:14px;line-height:1.4;width:-moz-max-content;width:max-content;max-width:calc(100% - 32px)}.error-message button{border:0;background:none;min-width:44px;height:44px;display:grid;place-items:center}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}@media (min-width:901px){:root{scrollbar-gutter:stable both-edges;background:var(--bg)}.appearance-menu{display:grid;grid-template-columns:145px 1fr;-moz-column-gap:24px;column-gap:24px;width:560px;padding:18px 54px 18px 18px}.appearance-heading{grid-column:1;grid-row:1;min-height:20px;align-items:start}.appearance-close{position:absolute;right:6px;top:6px;margin:0}.appearance-options{grid-column:2;grid-row:1 / 3;align-self:center;margin-top:0}.appearance-caption{grid-column:1;grid-row:2;margin-top:6px}.menu-bridge{clip-path:polygon(calc(var(--anchor-x) - 24px) calc(var(--anchor-y) - 12px),calc(var(--anchor-x) + 24px) calc(var(--anchor-y) - 12px),calc(50% + 280px) 100%,calc(50% - 280px) 100%)}}@media (min-width:901px) and (min-height:781px){.detail-copy h2{font-size:clamp(30px,2.6vw,44px);margin-bottom:16px}.system-description{margin-bottom:14px}.part-list button{padding:11px 0}.benefit{margin-top:14px}.detail-copy{padding:22px 22px 18px;background:#0b1016d9;border:1px solid var(--line-strong);border-radius:var(--radius-panel);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);box-shadow:0 24px 60px -30px #000}}@media (min-width:901px) and (max-height:780px){.masthead{height:64px}.intro h1{font-size:38px}.intro-description{font-size:13px}.detail-copy h2{font-size:32px;margin-bottom:18px}.system-description{margin-bottom:14px}.benefit{margin-top:16px}.feature-notes{gap:18px}.feature-note h3{font-size:15px}.feature-note p{font-size:13px}.experience:not(.phase-overview){height:auto;min-height:100dvh}.experience:not(.phase-overview) .stage{height:auto;flex:none}.detail-copy{position:relative;right:auto;top:auto;width:var(--scene-width);max-width:none;max-height:none;overflow:visible;margin:0 auto;padding:calc(var(--scene-height) + 116px) 0 8px;display:grid;grid-template-columns:1fr 1fr;gap:36px}.phase-overview .detail-copy{display:none}}@media (max-width:1100px){.header-middle{display:none}}@media (max-width:900px){:root{scrollbar-gutter:stable;background:var(--bg)}.experience{height:auto;min-height:100svh;overflow:hidden}.masthead{height:72px;width:calc(100% - 40px)}.wordmark{font-size:18px}.stage{flex:none;height:calc(var(--scene-height, (100vw - 40px) * .562799) + 132px);min-height:0}.intro{top:24px;display:block}.intro h1{font-size:clamp(32px,5.8vw,48px)}.intro-description{margin-top:14px;font-size:14px;text-align:left}.intro-description span{display:inline}.intro-description span+span:before{content:" "}.appearance-menu{width:300px}.scene-footer{height:auto;min-height:256px;flex:1;padding-top:28px;padding-bottom:max(20px,env(safe-area-inset-bottom));gap:28px}.feature-notes{grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}.feature-note p{max-width:30ch}.footer-baseline{font-size:11px;gap:24px}.footer-baseline span:last-child{text-align:right;max-width:26ch}.back{left:20px;top:28px}.back kbd{display:none}.phase-detail .stage,.phase-entering .stage,.phase-returning .stage{height:auto;min-height:0}.detail-copy{position:relative;top:auto;right:auto;width:auto;max-width:620px;max-height:none;overflow:visible;margin:0 auto;padding:calc(160px + var(--scene-height, (100vw - 40px) * .562799)) 20px 8px}.detail-copy h2{font-size:40px}.detail-copy h2 span{display:inline}.detail-copy h2 span+span:before{content:" "}.system-description{font-size:16px}.benefit{margin-top:24px}.phase-overview .detail-copy{display:none}.transition-status{bottom:8px}.annotation-label{font-size:12px;padding:8px 10px;border-radius:10px;max-width:180px;white-space:normal;text-align:left}}@media (max-width:480px){.masthead{height:68px}.concept-label{font-size:12px}.wordmark{font-size:17px}.intro h1{font-size:clamp(30px,8.2vw,38px)}.intro-description{font-size:13px;max-width:28ch}.intro-description span{display:block}.intro-description span+span:before{content:none}.media-envelope{border-radius:14px}.image-plane:after{border-radius:15px}.appearance-menu{width:288px;padding:12px 16px 14px}.feature-note h3{font-size:15px}.feature-note p{font-size:13px}.feature-notes{gap:22px 20px}.hotspot-ring{width:26px;height:26px}.hotspot-label{font-size:13px}.detail-copy h2{font-size:34px}.detail-copy{padding-right:20px;padding-left:20px}}@media (prefers-reduced-motion:reduce){*,*:before,*:after{animation:none!important;transition-duration:.01ms!important}.car-visual{transform:none!important}}