html,body{touch-action:manipulation;height:100%;margin:0;overflow:hidden}[hidden]{display:none!important}#scene-wrapper{width:100vw;height:100vh;position:relative}#scene{touch-action:none;width:100%;height:100%;display:block}:root{--hud-text:#f5f5f7;--hud-dim:#9da0ac;--hud-panel:#161820e6;--hud-panel-border:#ffffff17;--hud-control-bg:#ffffff0d;--hud-control-border:#ffffff17;--hud-accent-camera:#6c7bff;--hud-accent-camera-tint:#6c7bff29;--hud-accent-time:#ffb454;--hud-accent-time-tint:#ffb45429;--hud-accent-display:#4fd8c4;--hud-accent-display-tint:#4fd8c429;--hud-accent-learn:#c98af0;--hud-accent-learn-tint:#c98af029;--hud-shuttle-past:#6fc7e8}.hud-dock,.hud-sheet,.hud-toggle-chip,.hud-search,#entity-search-results{color:var(--hud-text);font-family:-apple-system,Segoe UI,Roboto,ui-sans-serif,system-ui,sans-serif}.icon-sprite{width:0;height:0;position:absolute;overflow:hidden}.icon{fill:none;stroke:currentColor;stroke-width:1.8px;stroke-linecap:round;stroke-linejoin:round;flex-shrink:0;width:18px;height:18px}.hud-dock{background:var(--hud-panel);backdrop-filter:blur(10px);border:1px solid var(--hud-panel-border);z-index:3;border-radius:20px;gap:4px;padding:8px;display:flex;position:fixed;bottom:16px;left:50%;transform:translate(-50%);box-shadow:0 16px 32px -16px #000000a6}.hud-dock-btn{appearance:none;cursor:pointer;color:var(--hud-dim);font:inherit;background:0 0;border:none;border-radius:14px;flex-direction:column;align-items:center;gap:3px;min-width:68px;padding:9px 18px;font-size:11px;font-weight:600;display:flex}.hud-dock-btn:hover{color:var(--hud-text)}.hud-dock-btn:focus-visible{outline-offset:2px;outline:2px solid #fff}.hud-dock-btn[data-panel=camera].is-active{background:var(--hud-accent-camera-tint);color:#c1c8ff}.hud-dock-btn[data-panel=time].is-active{background:var(--hud-accent-time-tint);color:#ffd8a8}.hud-dock-btn[data-panel=display].is-active{background:var(--hud-accent-display-tint);color:#a9f3e7}.hud-dock-btn[data-panel=learn].is-active{background:var(--hud-accent-learn-tint);color:#e6c9fb}.hud-sheet{overscroll-behavior:contain;background:var(--hud-panel);backdrop-filter:blur(10px);border:1px solid var(--hud-panel-border);opacity:0;pointer-events:none;z-index:2;border-radius:18px;width:min(420px,100vw - 32px);max-height:calc(100vh - 136px);padding:18px;transition:transform .16s,opacity .16s;position:fixed;bottom:84px;left:50%;overflow-y:auto;transform:translate(-50%,10px);box-shadow:0 20px 44px -18px #000000a6}.hud-sheet.is-open{opacity:1;pointer-events:auto;transform:translate(-50%)}.hud-sheet-panel{flex-direction:column;gap:14px;display:none}.hud-sheet-panel.is-active{display:flex}.hud-btn{appearance:none;border:1px solid var(--hud-control-border);cursor:pointer;font:inherit;color:var(--hud-text);background:var(--hud-control-bg);border-radius:12px;align-items:center;gap:8px;padding:10px 14px;font-size:13.5px;font-weight:600;display:flex}.hud-btn:hover{background:#ffffff17}.hud-btn-primary{background:var(--hud-accent-camera);border-color:var(--hud-accent-camera)}.hud-btn-primary:hover{background:#7d8aff}.hud-search{background:var(--hud-control-bg);border:1px solid var(--hud-control-border);border-radius:12px;align-items:center;gap:8px;padding:9px 12px;display:flex}.hud-search .icon{color:var(--hud-dim)}.hud-search input{min-width:0;font:inherit;color:var(--hud-text);background:0 0;border:none;outline:none;flex:1;font-size:13.5px}.hud-search input::placeholder{color:var(--hud-dim)}#entity-search-results{max-height:160px;overflow-y:auto}#entity-search-results:not(:empty){border:1px solid var(--hud-control-border);border-radius:12px;margin-top:-4px;padding:4px}.hud-search-result{cursor:pointer;border-radius:8px;padding:7px 10px;font-size:13px}.hud-search-result:hover{background:var(--hud-accent-camera-tint)}.hud-chip{background:var(--hud-accent-camera-tint);color:#c1c8ff;border-radius:999px;align-items:center;gap:8px;width:fit-content;padding:7px 8px 7px 14px;font-size:13px;display:flex}.hud-chip-close{appearance:none;cursor:pointer;color:#fff;background:#ffffff29;border:none;border-radius:50%;place-items:center;width:20px;height:20px;display:grid}.hud-chip-close .icon{width:11px;height:11px}.hud-row{flex-wrap:wrap;align-items:center;gap:10px;display:flex}.hud-row-between{color:var(--hud-dim);letter-spacing:.02em;align-items:center;gap:10px;font-size:11.5px;display:flex}.hud-icon-btn{appearance:none;border:1px solid var(--hud-control-border);cursor:pointer;background:var(--hud-control-bg);color:var(--hud-text);width:40px;height:40px;font:inherit;border-radius:50%;place-items:center;display:grid;position:relative}.hud-icon-btn:hover{background:#ffffff1a}#time-play-pause .btn-label{clip:rect(0 0 0 0);white-space:nowrap;width:1px;height:1px;position:absolute;overflow:hidden}.icon-play-glyph,#time-play-pause.is-paused .icon-pause-glyph{display:none}#time-play-pause.is-paused .icon-play-glyph{display:block}.hud-select{font:inherit;color:var(--hud-text);background:var(--hud-control-bg);border:1px solid var(--hud-control-border);border-radius:10px;padding:9px 10px;font-size:13px}.hud-range{-webkit-appearance:none;appearance:none;cursor:pointer;background:0 0;width:100%;height:20px}.hud-range::-webkit-slider-runnable-track{background:#ffffff24;border-radius:999px;height:4px}.hud-range::-moz-range-track{background:#ffffff24;border-radius:999px;height:4px}.hud-range::-webkit-slider-thumb{-webkit-appearance:none;border:2px solid var(--hud-accent-time);background:#fff;border-radius:50%;width:16px;height:16px;margin-top:-6px}.hud-range::-moz-range-thumb{border:2px solid var(--hud-accent-time);background:#fff;border-radius:50%;width:16px;height:16px}.hud-range:focus-visible{outline-offset:3px;outline:2px solid #fff}.hud-readout{font-variant-numeric:tabular-nums;color:var(--hud-dim);font-size:13px}.hud-shuttle{align-items:center;gap:10px;display:flex}.hud-shuttle-end{color:var(--hud-dim);width:15px;height:15px}.hud-shuttle-track-wrap{flex:1;align-items:center;height:20px;display:flex;position:relative}.hud-shuttle-track{background:#ffffff24;border-radius:999px;height:4px;position:absolute;left:0;right:0;overflow:visible}.hud-shuttle-fill{background:var(--hud-accent-time);border-radius:999px;width:0;position:absolute;top:0;bottom:0}.hud-shuttle-fill.is-past{background:var(--hud-shuttle-past)}.hud-shuttle-center{background:#fff;border-radius:1px;width:2px;margin-left:-1px;position:absolute;top:-5px;bottom:-5px;left:50%;box-shadow:0 0 0 3px #ffffff24}.hud-shuttle-input{z-index:1;position:relative}.hud-shuttle-input::-webkit-slider-runnable-track{background:0 0}.hud-shuttle-input::-moz-range-track{background:0 0}.hud-shuttle-labels{letter-spacing:.06em;text-transform:uppercase;color:var(--hud-dim);justify-content:space-between;margin-top:-6px;padding:0 1px;font-size:10.5px;font-weight:600;display:flex}.hud-shuttle-labels .hud-shuttle-now{color:var(--hud-text)}.hud-segmented{background:var(--hud-control-bg);border:1px solid var(--hud-control-border);border-radius:12px;gap:3px;padding:3px;display:flex}.hud-segmented-btn{appearance:none;cursor:pointer;color:var(--hud-dim);font:inherit;background:0 0;border:none;border-radius:9px;flex:1;padding:9px 0;font-size:12.5px;font-weight:600;transition:background .12s,color .12s}.hud-segmented-btn:hover{color:var(--hud-text)}.hud-segmented-btn[aria-pressed=true]{color:#a9f3e7;background:var(--hud-accent-display-tint)}.hud-segmented-btn:focus-visible{outline-offset:2px;outline:2px solid #fff}.hud-toggle-grid{grid-template-columns:repeat(auto-fill,minmax(118px,1fr));gap:8px;display:grid}.hud-toggle-chip{border-radius:12px;display:block;position:relative}.hud-toggle-chip input[type=checkbox]{opacity:0;cursor:pointer;z-index:1;margin:0;position:absolute;inset:0}.hud-toggle-visual{color:var(--hud-dim);background:var(--hud-control-bg);border:1px solid var(--hud-control-border);border-radius:12px;align-items:center;gap:7px;padding:9px 10px;font-size:12.5px;font-weight:600;display:flex}.hud-toggle-visual .icon-check{width:13px;height:13px;color:var(--hud-accent-display);opacity:0;transition:opacity .12s,transform .12s;transform:scale(.5)}.hud-toggle-chip input:checked~.hud-toggle-visual{color:#a9f3e7;background:var(--hud-accent-display-tint);border-color:#4fd8c44d}.hud-toggle-chip input:checked~.hud-toggle-visual .icon-check{opacity:1;transform:scale(1)}.hud-toggle-chip input:focus-visible~.hud-toggle-visual{outline-offset:2px;outline:2px solid #fff}@media (prefers-reduced-motion:reduce){.hud-sheet,.hud-toggle-visual .icon-check{transition:none}}@media (width<=480px){.hud-dock-btn{min-width:0;padding:9px 12px}.hud-dock-label{display:none}}.hud-lesson-picker{background:var(--hud-panel);backdrop-filter:blur(10px);border:1px solid var(--hud-panel-border);z-index:2;border-radius:14px;flex-direction:column;gap:4px;padding:8px;font-family:-apple-system,Segoe UI,Roboto,ui-sans-serif,system-ui,sans-serif;display:flex;position:fixed;top:60px;right:16px;box-shadow:0 20px 44px -18px #000000a6}.hud-lesson-picker-item{appearance:none;cursor:pointer;color:var(--hud-text);text-align:left;font:inherit;white-space:nowrap;background:0 0;border:none;border-radius:10px;padding:9px 12px;font-size:13px}.hud-lesson-picker-item:hover{background:var(--hud-accent-learn-tint)}.hud-lesson-panel{background:var(--hud-panel);backdrop-filter:blur(10px);border:1px solid var(--hud-panel-border);z-index:2;width:min(560px,100vw - 32px);max-height:min(254px,100% - 138px);color:var(--hud-text);border-radius:20px;padding:14px 18px;font-family:-apple-system,Segoe UI,Roboto,ui-sans-serif,system-ui,sans-serif;position:fixed;top:max(16px,100% - 376px);left:50%;overflow-y:auto;transform:translate(-50%);box-shadow:0 16px 32px -16px #000000a6}.hud-lesson-panel.is-dragging{transition:none;box-shadow:0 24px 48px -16px #000000bf}.hud-lesson-panel-grip{cursor:grab;touch-action:none;-webkit-user-select:none;user-select:none;justify-content:center;margin:-6px 0 0;padding:2px 0 10px;display:flex}.hud-lesson-panel-grip:active,.hud-lesson-panel.is-dragging .hud-lesson-panel-grip{cursor:grabbing}.hud-lesson-panel-grip-bar{background:#ffffff47;border-radius:999px;width:44px;height:5px;transition:background .15s}.hud-lesson-panel-grip:hover .hud-lesson-panel-grip-bar{background:#ffffff73}.hud-lesson-panel-grip:active .hud-lesson-panel-grip-bar,.hud-lesson-panel.is-dragging .hud-lesson-panel-grip-bar{background:#ffffffa6}body[data-app-mode=learn] .hud-dock-btn[data-panel=camera],body[data-app-mode=learn] .hud-dock-btn[data-panel=time],body[data-app-mode=learn] .hud-camera-hint{display:none}body[data-app-mode=learn] #learn-mode-btn-label:before{content:"Exit "}.hud-lesson-text{color:var(--hud-text);margin:0;font-size:12.5px;line-height:1.5}.hud-phase-inset{background:var(--hud-panel);backdrop-filter:blur(10px);border:1px solid var(--hud-panel-border);z-index:1;color:var(--hud-text);pointer-events:none;border-radius:14px;align-items:center;gap:10px;padding:10px 14px 10px 10px;font-family:-apple-system,Segoe UI,Roboto,ui-sans-serif,system-ui,sans-serif;display:flex;position:fixed;top:64px;right:16px}.hud-phase-inset[hidden]{display:none}.hud-phase-moon{width:56px;height:56px}.hud-phase-dark{fill:#2a2c33}.hud-phase-lit{fill:#e9e6dc}.hud-phase-caption{flex-direction:column;gap:2px;font-size:12.5px;display:flex}.hud-phase-heading,.hud-phase-share{color:var(--hud-dim);font-size:11px}@media (width<=600px){.hud-phase-inset{padding:6px 10px 6px 6px;top:12px}.hud-phase-moon{width:40px;height:40px}}.hud-lesson-note{color:var(--hud-dim);margin:8px 0 0;font-size:11.5px;line-height:1.45}.gpu-lost-alert{z-index:100;border:1px solid var(--hud-panel-border);background:var(--hud-panel);max-width:calc(100% - 32px);color:var(--hud-text);border-radius:12px;padding:10px 14px;font:13px/1.4 system-ui,sans-serif;position:fixed;top:16px;left:50%;transform:translate(-50%)}.gpu-lost-alert button{border:1px solid var(--hud-control-border);background:var(--hud-control-bg);color:inherit;font:inherit;cursor:pointer;border-radius:8px;margin-left:8px;padding:4px 10px}.hud-camera-hint{box-sizing:border-box;background:var(--hud-panel);border:1px solid var(--hud-panel-border);width:max-content;max-width:calc(100vw - 32px);color:var(--hud-dim);text-align:center;pointer-events:none;border-radius:999px;padding:7px 14px;font:12px/1.4 system-ui,sans-serif;position:fixed;top:14px;left:50%;transform:translate(-50%)}.hud-touch-pad{pointer-events:none;justify-content:space-between;align-items:flex-end;display:flex;position:fixed;bottom:96px;left:16px;right:16px}.hud-touch-stick{border:1px solid var(--hud-control-border);pointer-events:auto;touch-action:none;background:#ffffff0f;border-radius:50%;justify-content:center;align-items:center;width:124px;height:124px;display:flex}.hud-touch-knob{background:var(--hud-accent-camera-tint);border:1px solid var(--hud-accent-camera);pointer-events:none;border-radius:50%;width:52px;height:52px}.hud-touch-buttons{pointer-events:auto;flex-direction:column;gap:10px;display:flex}.hud-touch-btn{border:1px solid var(--hud-control-border);width:52px;height:52px;color:var(--hud-text);touch-action:none;-webkit-user-select:none;user-select:none;background:#ffffff0f;border-radius:50%;font-size:18px}.hud-touch-btn:active{background:var(--hud-accent-camera-tint)}#body-labels{pointer-events:none;position:absolute;inset:0;overflow:hidden}.body-label,.moon-label,.small-body-label{color:#fff;text-shadow:0 0 3px #000,0 0 3px #000;white-space:nowrap;font:12px sans-serif;position:absolute;transform:translate(-50%,4px)}.moon-label{color:#ffffffbf;font-size:10px}.small-body-label{color:#bee1ebb3;font-size:10px;font-style:italic}#axis-line-label{transform:translate(-50%,-14px)}