:root{color-scheme:dark;--space: #05070b;--control-glass: #0b0e14e8;--accent-surface: #ffffff0c;--accent-line: #ffffff55;--accent-hover: #ffffff;--on-accent: #101318;--surface: #101319;--surface-solid: #13171e;--surface-hover: #ffffff0e;--text-primary: #f0f2f5;--text-secondary: #b2bac6;--text-muted: #8c96a5;--accent: #e3e8ef;--line: #ffffff14;--line-strong: #ffffff2e;--radius-control: 6px;--radius-card: 10px;--hud-shadow: 0 6px 24px #00000024, 0 0 0 1px #ffffff0b;--page-gutter: clamp(14px, 2vw, 28px);--font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;--font-mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;--font-size-relation: 10px}*{box-sizing:border-box}[hidden]{display:none!important}html,body,#root{width:100%;height:100%;overflow:hidden}html{background:var(--space);color-scheme:dark}body{margin:0;font-family:var(--font-body);color:var(--text-primary);-webkit-font-smoothing:antialiased}button,input,select{font:inherit}button,a,input,select{-webkit-tap-highlight-color:transparent}button{border:0;background:none;color:inherit;cursor:pointer;min-width:44px;min-height:44px;transition:background-color .15s,color .15s}button,a{touch-action:manipulation}button:disabled,select:disabled{opacity:.38;cursor:not-allowed}button:not(:disabled):active{transform:scale(.96)}button:focus-visible,a:focus-visible,select:focus-visible,input:focus-visible,canvas:focus-visible{outline:2px solid var(--accent);outline-offset:2px}button svg{flex-shrink:0}a{color:var(--accent);min-width:44px;min-height:44px}h1,h2,h3,p{margin:0}h1,h2,h3{text-wrap:balance}p{text-wrap:pretty}::selection{background:var(--accent);color:var(--space)}.sr-only,.quiet-story{position:absolute!important;width:1px!important;height:1px!important;padding:0!important;overflow:hidden!important;clip-path:inset(50%);white-space:nowrap;border:0!important}.cosmos{position:relative;isolation:isolate;width:100%;height:100vh;height:100dvh;overflow:hidden;background:var(--space)}.hud-surface{background:var(--control-glass);border-radius:var(--radius-card);box-shadow:var(--hud-shadow)}.exploration,.scene-column,.canvas-host{position:absolute;inset:0;min-width:0;min-height:0;pointer-events:none}.canvas-host canvas{position:absolute;inset:0;display:block;width:100%;height:100%;pointer-events:auto;cursor:grab;z-index:0}.canvas-host canvas:active{cursor:grabbing}.canvas-host canvas:focus-visible{outline-offset:-3px}.topbar{position:absolute;top:max(16px,env(safe-area-inset-top));left:max(var(--page-gutter),env(safe-area-inset-left));right:max(var(--page-gutter),env(safe-area-inset-right));display:flex;align-items:flex-start;justify-content:space-between;gap:12px;z-index:10;pointer-events:none}.navigation-home,.header-actions{display:flex;align-items:center;padding:3px;pointer-events:auto}.brand{display:flex;align-items:center;gap:9px;padding:0 10px}.brand>span{font-size:10px;letter-spacing:.16em;font-weight:550;white-space:nowrap}.brand svg{color:var(--text-secondary)}.back-overview{border-left:1px solid var(--line)}.icon-button{width:44px;height:44px;min-width:44px;flex-shrink:0;padding:0;display:inline-flex;align-items:center;justify-content:center;border-radius:var(--radius-control);color:var(--text-secondary)}.text-button{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:0 12px;font-size:12px;color:var(--text-secondary);border-radius:var(--radius-control);white-space:nowrap}.icon-button:hover:not(:disabled),.text-button:hover:not(:disabled){background:var(--surface-hover);color:var(--text-primary)}button[aria-pressed=true]{color:var(--text-primary);background:var(--accent-surface)}.immersive-button[aria-pressed=true]{box-shadow:inset 0 -2px var(--accent)}.world-story{position:absolute;left:max(var(--page-gutter),env(safe-area-inset-left));top:calc(max(16px,env(safe-area-inset-top)) + 64px);width:224px;max-width:calc(100% - 28px);max-height:calc(100dvh - 220px);overflow:auto;overscroll-behavior:contain;padding:10px 10px 10px 16px;z-index:5;pointer-events:auto;scrollbar-width:thin}.world-story[data-info-expanded=true]{width:292px;padding-bottom:18px}.world-heading{display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:44px}.world-heading h1{font-size:21px;font-weight:450;letter-spacing:.06em;line-height:1.4}.world-heading h1 span{display:block;color:var(--text-muted);font:8px/1.7 var(--font-mono);letter-spacing:.07em;margin-top:2px}#world-information{padding-right:6px}.world-category{font-size:11px;line-height:1.8;color:var(--text-muted);margin-top:16px}.world-story h2{font-size:15px;font-weight:450;line-height:1.7;margin-top:8px}.description{font-size:13px;line-height:1.9;color:var(--text-secondary);margin-top:8px}.discovery-button{display:inline-flex;align-items:center;justify-content:center;gap:9px;min-height:44px;padding:0 12px;background:var(--accent);color:var(--on-accent);font-size:12px;font-weight:550;border-radius:var(--radius-control);margin-top:18px}.discovery-button:hover{background:var(--accent-hover)}.answer-card{margin-top:16px;border-top:1px solid var(--line);padding-top:14px}.answer-card strong{font-size:13px;font-weight:500;line-height:1.8}.answer-card p{font-size:13px;color:var(--text-secondary);line-height:1.9;margin-top:6px}.answer-audio{display:flex;gap:8px;align-items:center;font-size:12px;margin-top:4px;padding:0 4px}.world-fact{border-top:1px solid var(--line);margin-top:14px;padding-top:14px}.world-fact strong{display:block;font-size:15px;font-weight:400;font-variant-numeric:tabular-nums}.world-fact>span{display:block;font-size:11px;line-height:1.8;margin-top:4px;color:var(--text-muted)}.destination-section{position:absolute;bottom:max(20px,env(safe-area-inset-bottom));left:50%;transform:translate(-50%);display:flex;align-items:center;gap:4px;width:max-content;max-width:min(700px,calc(100% - 380px));padding:4px;z-index:9}.focus-destination{flex-shrink:0;width:104px;min-width:44px;min-height:44px;border:0;border-radius:var(--radius-control);background:transparent;color:var(--text-primary);padding:0 8px;font-size:12px;cursor:pointer}select option{background:var(--surface-solid);color:var(--text-primary)}.destination-list{position:relative;display:flex;align-items:center;gap:2px;min-width:0;overflow-x:auto;overflow-y:hidden;padding:4px;scroll-padding-inline:4px;overscroll-behavior-x:contain;scrollbar-width:thin;scrollbar-color:var(--line-strong) transparent}.destination{position:relative;flex:0 0 62px;display:flex;flex-direction:column;align-items:center;justify-content:flex-start;gap:5px;min-height:72px;padding:6px 4px;border-radius:var(--radius-control)}.destination:hover{background:var(--surface-hover)}.destination.selected{background:var(--accent-surface)}.destination.selected:after{content:"";position:absolute;bottom:0;left:18px;right:18px;height:1px;background:var(--accent)}.destination-name{font-size:11px;line-height:1.3;color:var(--text-secondary);white-space:nowrap}.destination-order{margin-right:4px;color:var(--text-muted);font:10px var(--font-mono);font-variant-numeric:tabular-nums}.destination-name small{display:block;margin-top:2px;font-size:var(--font-size-relation);color:var(--text-muted)}.destination.selected .destination-name{color:var(--text-primary)}.destination-check{position:absolute;top:3px;right:3px;color:var(--text-muted)}.planet-thumb{width:23px;height:23px;border-radius:50%;flex-shrink:0;box-shadow:inset -6px -2px 8px #000a;position:relative;background-size:cover;background-position:center}.thumb-earth{background-image:url(../textures/earth.jpg);box-shadow:inset -2px -1px 3px #0003}.thumb-sun{background-image:url(../textures/sun-day-1k.jpg);box-shadow:none}.thumb-mercury{background-image:url(../textures/mercury-day-1k.jpg)}.thumb-venus{background-image:url(../textures/venus-day-1k.jpg)}.thumb-moon{background-image:url(../textures/moon-day-1k.jpg)}.thumb-mars{background-image:url(../textures/mars-day-1k.jpg)}.thumb-jupiter{background-image:url(../textures/jupiter-day-1k.jpg)}.thumb-saturn{background-image:url(../textures/saturn-day-1k.jpg)}.thumb-uranus{background-image:url(../textures/uranus-day-1k.jpg)}.thumb-neptune{background-image:url(../textures/neptune-day-1k.jpg)}.thumb-saturn:after{content:"";position:absolute;inset:5px -5px;border:2px solid #b0a2898c;border-radius:50%;transform:rotate(-25deg)}.epoch-note{position:absolute;bottom:116px;left:max(var(--page-gutter),env(safe-area-inset-left));z-index:4;padding:4px 0;max-width:280px;text-align:left;color:var(--text-muted);font-size:var(--font-size-relation);line-height:1.8;text-shadow:0 1px 5px #000}.epoch-note span,.epoch-note strong{display:block}.epoch-note strong{color:var(--text-secondary);font-size:12px;font-weight:500}.epoch-note .orbit-relation{color:var(--text-secondary);font-size:11px;margin-bottom:4px}[data-view=overview] .epoch-note,[data-immersive=true] .epoch-note{top:calc(max(16px,env(safe-area-inset-top)) + 64px);bottom:auto;max-width:calc(100% - 2 * var(--page-gutter))}.epoch-note:hover{color:var(--text-primary)}.scene-tools{--tools-bottom: max(20px, env(safe-area-inset-bottom));position:absolute;right:max(var(--page-gutter),env(safe-area-inset-right));bottom:var(--tools-bottom);padding:4px;z-index:8;pointer-events:auto}.view-controls,.rotate-controls,.navigation-modes,.framing-controls,.simulation-controls{display:flex;align-items:center}.tools-popover{position:absolute;bottom:calc(100% + 12px);right:0;width:300px;max-width:calc(100vw - 28px);max-height:calc(100dvh - var(--tools-bottom) - 100% - max(80px,calc(env(safe-area-inset-top) + 72px)) - 12px);overflow-y:auto;overscroll-behavior:contain;padding:12px 16px 16px;scrollbar-width:thin}.tools-heading{display:flex;align-items:center;justify-content:space-between;gap:8px}.tools-heading h2{font-size:13px;font-weight:500;letter-spacing:.05em}.overview-framing{display:flex;border-bottom:1px solid var(--line);margin-bottom:4px;padding-bottom:4px}.overview-framing>button{flex:1;font-size:11px;padding-inline:6px}.navigation-modes{border-bottom:1px solid var(--line);padding-bottom:4px;margin-bottom:4px;gap:4px}.navigation-modes>button{flex:1;gap:6px;padding-inline:8px}.navigation-modes>button[aria-pressed=true]{box-shadow:inset 0 0 0 1px var(--accent-line)}.rotate-controls{justify-content:space-between;padding-top:8px}.framing-controls{gap:4px;margin-top:12px}.framing-controls>button{flex:1;font-size:12px;border:1px solid var(--line);border-radius:var(--radius-control)}.framing-controls>button:hover:not(:disabled){background:var(--surface-hover)}.simulation-controls{justify-content:space-between;margin-top:14px;border-top:1px solid var(--line);padding-top:8px}.simulation-speed select{min-height:44px;min-width:60px;padding:0 8px;border:1px solid var(--line);background:transparent;color:var(--text-primary);cursor:pointer;font:12px var(--font-mono);border-radius:var(--radius-control)}.roam-status{display:flex;flex-wrap:wrap;gap:6px 12px;border-top:1px solid var(--line);margin-top:14px;padding-top:12px;font-size:11px;line-height:1.6;color:var(--text-muted);font-variant-numeric:tabular-nums}.texture-status{flex-basis:100%;color:var(--text-secondary)}.journey-actions{display:flex;justify-content:space-between;gap:4px;margin-top:8px}.scene-status{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);z-index:4;width:max-content;max-width:min(320px,calc(100% - 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28px));width:560px;max-height:85dvh;overflow-y:auto;overscroll-behavior:contain;box-shadow:0 24px 100px #0008}.panel::backdrop{background:#030508bd;backdrop-filter:blur(4px)}.panel-header{display:flex;justify-content:space-between;align-items:center;gap:16px}.panel-header h2{font-size:21px;font-weight:450}.panel-intro{color:var(--text-secondary);font-size:13px;line-height:1.9;margin:13px 0 20px}.setting-label{font-size:13px;display:block;margin-bottom:10px}.panel select{width:100%;min-height:48px;background:var(--surface-hover);color:var(--text-primary);border:1px solid var(--line-strong);border-radius:var(--radius-control);padding:0 12px}.field-hint{font-size:11px;line-height:1.8;color:var(--text-muted);margin-top:10px}.toggle-row{display:flex;align-items:center;justify-content:space-between;gap:16px;border-top:1px solid var(--line);margin-top:18px;padding:14px 0 0;cursor:pointer}.toggle-row strong{font-size:13px;font-weight:500}.toggle-row small{display:block;font-size:12px;line-height:1.8;color:var(--text-muted);margin-top:6px}.toggle-row input{appearance:none;position:relative;width:44px;height:44px;min-width:44px;margin:0;cursor:pointer}.toggle-row input:before{content:"";position:absolute;inset:11px;border:1px solid var(--line-strong);border-radius:4px}.toggle-row input:checked:before{background:var(--accent);border-color:var(--accent)}.toggle-row input:checked:after{content:"";position:absolute;left:19px;top:15px;width:6px;height:11px;transform:rotate(45deg);border:solid var(--on-accent);border-width:0 2px 2px 0}.diagnostics{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:24px}.diagnostics strong{font:18px var(--font-mono);font-variant-numeric:tabular-nums}.diagnostics span{display:block;font-size:11px;color:var(--text-muted);margin-top:8px}.secondary-button{display:flex;align-items:center;justify-content:center;width:100%;gap:9px;border:1px solid var(--line-strong);border-radius:var(--radius-control);min-height:44px;margin-top:12px;font-size:12px}.secondary-button:hover{background:var(--surface-hover)}.panel-home{display:flex;align-items:center;justify-content:center;width:100%;gap:8px;font-size:12px;color:var(--text-secondary);margin-top:12px}.panel-links{display:flex;align-items:center;gap:12px}.help-step{display:flex;gap:16px;margin-top:22px}.help-step>span{font:12px var(--font-mono);color:var(--text-muted);padding-top:4px}.help-step h3{font-size:15px;font-weight:500}.help-step p{font-size:13px;color:var(--text-secondary);line-height:1.9;margin-top:8px}.about-copy{font-size:13px;color:var(--text-secondary);line-height:1.95}.about-copy>p{margin-top:15px}.about-copy h3{font-size:15px;font-weight:500;color:var(--text-primary);margin-top:22px}.source-links{display:flex;gap:4px 18px;flex-wrap:wrap;margin-top:8px}.source-links a{display:flex;align-items:center;gap:5px;font-size:12px;text-decoration:none}.source-links a:hover{text-decoration:underline}@media(max-width:1000px){.destination-section{max-width:calc(100% - 32px);bottom:max(16px,env(safe-area-inset-bottom))}.scene-tools{--tools-bottom: calc(max(16px, env(safe-area-inset-bottom)) + 104px) }.epoch-note{bottom:calc(max(16px,env(safe-area-inset-bottom)) + 104px)}}@media(max-width:600px){.topbar{top:max(12px,env(safe-area-inset-top));gap:8px}.brand{padding-inline:7px}.brand>span{display:none}.world-story{top:calc(max(12px,env(safe-area-inset-top)) + 64px);width:204px;max-height:calc(100dvh - 256px)}.world-heading h1{font-size:19px}.world-story[data-info-expanded=true]{width:280px}.destination-section{max-width:calc(100% - 28px)}.focus-destination{width:98px;font-size:11px}.epoch-note{max-width:calc(100% - 178px)}[data-view=overview] .epoch-note,[data-immersive=true] .epoch-note{top:calc(max(12px,env(safe-area-inset-top)) + 64px)}[data-tools-expanded=true] .epoch-note,[data-tools-expanded=true] .world-story{visibility:hidden;pointer-events:none}.panel{padding:18px}.panel-header h2{font-size:19px}.diagnostics strong{font-size:16px}}@media(max-height:540px){.world-story{max-height:calc(100dvh - 180px)}[data-view=detail][data-immersive=false] .epoch-note{display:none}.scene-tools{--tools-bottom: max(16px, env(safe-area-inset-bottom))}.destination-section{left:var(--page-gutter);transform:none;max-width:calc(100% - 350px)}}@media(max-height:540px)and (max-width:600px){.destination-section{left:var(--page-gutter);transform:none;max-width:calc(100% - 180px)}.destination-section .focus-destination{width:82px}.destination-list{position:absolute;bottom:calc(100% + 8px);left:0;width:min(280px,calc(100vw - 180px));background:var(--control-glass);border-radius:var(--radius-card)}[data-tools-expanded=true] .destination-list{display:none}.world-story{max-height:calc(100dvh - 160px)}}@media(prefers-reduced-motion:reduce){.loading-orbit{animation:none}button{transition:none}}[data-reduced=true] .loading-orbit{animation:none}[data-reduced=true] button{transition:none}