:root{color:#25485a;font-synthesis:none;--ink:#25485a;--teal:#117f97;--line:#355e702e;background:#dcebf1;font-family:Aptos,Yu Gothic UI,Hiragino Kaku Gothic ProN,Meiryo,sans-serif;font-size:14px}*{box-sizing:border-box}body{margin:0;overflow:hidden}button,a,input{-webkit-tap-highlight-color:transparent}button{font:inherit;cursor:pointer;color:inherit}button:focus-visible,a:focus-visible,input:focus-visible{outline-offset:3px;outline:3px solid #e3a139}button:disabled{cursor:default;opacity:.45}[hidden]{display:none!important}#world{touch-action:none;width:100%;height:100%;display:block;position:fixed;inset:0}.app{pointer-events:none;width:100%;height:100dvh;min-height:320px;position:relative;overflow:hidden}.topbar{padding:calc(18px + env(safe-area-inset-top)) max(22px,env(safe-area-inset-right)) 14px max(22px,env(safe-area-inset-left));z-index:2;background:linear-gradient(#edf4f7c9,#0000);justify-content:space-between;align-items:center;display:flex;position:absolute;inset:0 0 auto}.brand{letter-spacing:-1.8px;color:var(--ink);pointer-events:auto;align-items:center;gap:6px;font-size:32px;font-weight:750;line-height:1;text-decoration:none;display:flex}.brand svg{fill:none;width:30px;height:30px;stroke:var(--teal);stroke-width:1.7px}.version{letter-spacing:.03em;color:#557785;font-size:10px}.version b{margin-left:4px;font-weight:600}.navigation{top:calc(80px + env(safe-area-inset-top));background:#f4f8f6e6;border:1px solid #ffffffb3;border-radius:15px;align-items:center;gap:12px;width:min(440px,100% - 40px);padding:12px 15px;display:flex;position:absolute;left:50%;transform:translate(-50%);box-shadow:0 5px 20px #25485a0b}.nav-compass{border:1px solid var(--line);border-radius:50%;flex:none;place-items:center;width:38px;height:38px;display:grid}.nav-compass svg{width:28px;height:28px;fill:var(--teal);transition:transform .12s linear}.nav-caption{color:#63808b;margin:0 0 5px;font-size:10px}.nav-target{align-items:baseline;gap:12px;margin:0;display:flex}.nav-target strong{letter-spacing:.04em;font-size:16px}.nav-target span{font-size:12px}.nav-vertical{max-width:65px;margin-left:auto;font-size:11px;line-height:1.5}.collection{border-left:1px solid var(--line);flex:none;align-items:baseline;gap:3px;padding-left:12px;font-size:11px;display:flex}.collection span:first-child{color:var(--teal);font-size:21px;font-weight:600}.center-mark{border:1px solid #ffffff38;border-radius:50%;width:56px;height:56px;position:absolute;top:50%;left:50%;transform:translate(-50%,-50%)}.center-mark:before,.center-mark:after{content:"";background:#fff9;width:7px;height:1px;position:absolute;top:50%}.center-mark:before{left:-10px}.center-mark:after{right:-10px}.toast{top:calc(162px + env(safe-area-inset-top));text-align:center;background:#f8fbf4ed;border:1px solid #fff;border-radius:20px;width:max-content;max-width:90%;margin:0;padding:10px 16px;font-size:12px;position:absolute;left:50%;transform:translate(-50%)}.bottom-panel{left:50%;bottom:calc(16px + env(safe-area-inset-bottom));pointer-events:auto;background:#f5f9f7eb;border:1px solid #ffffffc9;border-radius:17px;width:min(500px,100% - 32px);padding:12px 16px;position:absolute;transform:translate(-50%);box-shadow:0 8px 32px #25485a12}.input-line{justify-content:space-between;align-items:center;padding-bottom:11px;font-size:10px;display:flex}.mode{color:#63808b}.mode:before{content:"";background:#9eafb3;border-radius:50%;width:6px;height:6px;margin-right:6px;display:inline-block}.app[data-input=sensor] .mode:before{background:#117f97}.motion-state{color:var(--teal);font-weight:600}.meters{grid-template-columns:repeat(3,1fr);gap:15px;display:grid}.meter>div:first-child{justify-content:space-between;gap:4px;font-size:10px;display:flex}.meter output{font-variant-numeric:tabular-nums;color:#547482;font-size:10px}.meter small{color:#68838e;margin-top:6px;font-size:9px;display:block}.meter-track{background:#dce7e9;border-radius:3px;height:4px;margin-top:8px;position:relative;overflow:hidden}.meter-track i{background:var(--teal);width:0;height:100%;display:block;position:absolute;left:0}.bilateral:after{content:"";background:#8fa9b1;width:1px;height:100%;position:absolute;left:50%}.flight-line{color:#62808c;border-bottom:1px solid var(--line);align-items:center;gap:16px;padding:13px 0 11px;font-size:10px;display:flex}.flight-line b{color:var(--ink);font-variant-numeric:tabular-nums;font-size:12px;font-weight:600}#stop-hint{margin-left:auto;font-size:9px}.toolbar{gap:8px;margin-top:10px;display:flex}.toolbar button{background:0 0;border:1px solid #b8cdd1;border-radius:7px;padding:8px 12px;font-size:11px}.toolbar button:first-child{min-width:85px}.toolbar button:last-child{border-radius:50%;width:31px;height:31px;margin-left:auto;padding:0;font-weight:600}.veil{-webkit-backdrop-filter:blur(5px);backdrop-filter:blur(5px);pointer-events:auto;z-index:4;background:#dcebf14a;justify-content:center;align-items:center;padding:74px 18px 24px;display:flex;position:absolute;inset:0;overflow:auto}.intro-card{text-align:center;background:#f7faf7f2;border:1px solid #fff;border-radius:24px;width:min(400px,100%);padding:26px 32px 20px;box-shadow:0 24px 80px #25485a24}.card-symbol{width:45px;height:45px;color:var(--teal);border:1px solid #a6c9cf;border-radius:14px;justify-content:center;align-items:center;margin-bottom:12px;font-size:36px;line-height:1;display:inline-flex}.card-kicker{color:#62838e;letter-spacing:.06em;margin:0 0 10px;font-size:11px}h1{letter-spacing:.04em;margin:0 0 12px;font-size:27px;font-weight:600;line-height:1.55}.dialog-description{color:#607e8a;margin:0;font-size:12px;line-height:1.85}.control-guide{text-align:left;flex-direction:column;gap:12px;margin:20px 0;display:flex}.control-guide>div{align-items:center;gap:14px;display:flex}.control-guide p{flex-direction:column;gap:3px;margin:0;display:flex}.control-guide b{font-size:12px;font-weight:600}.control-guide p span{color:#6c8790;font-size:11px}.phone-glyph{width:29px;height:37px;color:var(--teal);border:1.6px solid #7da5af;border-radius:5px;flex:none;place-items:center;font-size:21px;display:grid}.pitch-glyph{transform:perspective(80px)rotateX(25deg)}.steer-glyph{transform:rotate(-13deg)}.twist-glyph{transform:rotate(15deg)}.dialog-note{color:#728a92;margin:0 0 16px;font-size:10px;line-height:1.8}.primary-button,.secondary-button{border:0;border-radius:10px;width:100%;padding:14px 10px;font-size:13px;font-weight:600;display:block}.primary-button{background:var(--teal);color:#fff;box-shadow:0 4px 12px #117f971c}.secondary-button{color:#486d7a;background:#e5eff0;margin-top:8px;padding:11px;font-size:12px}.text-button{color:#6a8792;background:0 0;border:0;padding:12px;font-size:11px;text-decoration:underline}.prototype-note{color:#889da4;margin-top:15px;font-size:9px;display:block}.error-message{color:#a04b35;text-align:left;background:#fbefe6;border-radius:8px;margin:0 0 14px;padding:12px;font-size:12px;line-height:1.8}.practice-panel{border-top:1px solid var(--line);margin-top:10px;padding-top:11px}.practice-panel>p{margin:0 0 8px;font-size:11px;font-weight:600}.practice-panel>p span{float:right;color:#6c8790;font-size:9px;font-weight:400}.practice-panel label{align-items:center;gap:12px;margin-top:4px;font-size:10px;display:flex}.practice-panel input{width:100%;height:22px;accent-color:var(--teal)}.practice-footer{justify-content:space-between;align-items:center;margin-top:6px;display:flex}.practice-footer small{color:#6c8790;font-size:9px}.practice-footer button{background:0 0;border:1px solid #b8cdd1;border-radius:5px;padding:5px 8px;font-size:10px}.app[data-phase=intro] .bottom-panel,.app[data-phase=intro] .navigation{opacity:.6}.app[data-phase=waiting] .primary-button{opacity:.65}.app[data-phase=complete] .card-symbol{color:#c08a27;border-color:#dec88e}.app[data-phase=running] .veil{display:none}@media (width>=900px){.topbar{padding:26px 36px}.navigation{top:30px}.bottom-panel{bottom:24px}.intro-card{padding:30px 36px 23px}}@media (height<=740px){.intro-card{padding:18px 25px 14px}.card-symbol{display:none}h1{margin-bottom:9px;font-size:23px;line-height:1.45}.control-guide{gap:9px;margin:15px 0}.dialog-note{margin-bottom:12px}.prototype-note{margin-top:10px}.veil{padding-top:65px}.primary-button{padding:12px 8px}.navigation{top:68px}}@media (height<=500px) and (width>=600px){.intro-card{text-align:left;grid-template-columns:1fr 1fr;column-gap:26px;width:600px;padding:20px 25px;display:grid}.card-kicker,h1,.dialog-description{grid-column:1}.control-guide{grid-area:1/2/5;margin:5px 0}.dialog-note{grid-column:1}.primary-button,.secondary-button,.error-message{grid-column:2}.prototype-note{text-align:center;grid-column:1/-1}.text-button{grid-column:1}.veil{padding:55px 14px 12px}.topbar{padding:12px 20px}.brand{font-size:25px}.navigation{width:340px;padding:7px 12px;top:10px}.nav-caption{font-size:9px}.bottom-panel{width:390px;padding:9px 13px;bottom:9px}.input-line{padding-bottom:7px}.flight-line{padding:8px 0}.meters{gap:10px}.toolbar{margin-top:7px}.toolbar button{padding:6px 9px}.practice-panel{background:#f5f9f7ed;border:1px solid #fff;border-radius:14px;width:260px;margin:0;padding:12px;position:absolute;bottom:0;right:calc(100% + 12px)}.practice-panel>p span{float:none;margin-top:4px;display:block}}@media (width<=360px){.intro-card{padding-left:22px;padding-right:22px}h1{font-size:23px}.bottom-panel{padding:11px 12px}.meters{gap:9px}.meter>div:first-child{font-size:9px}#stop-hint{display:none}.navigation{gap:9px;width:calc(100% - 30px)}.nav-caption{font-size:9px}}@media (prefers-reduced-motion:reduce){*{scroll-behavior:auto!important}.nav-compass svg{transition:none}}.practice-panel label{white-space:nowrap}.practice-panel input{min-width:0}.practice-footer{gap:7px}.practice-footer small{margin-right:auto;line-height:1.6}.practice-footer button{flex-shrink:0}.meter small{line-height:1.6}.dialog-description{max-width:290px;margin-left:auto;margin-right:auto}.mode-tag{color:#537783;background:#edf6f4b3;border:1px solid #a5c3cd;border-radius:20px;padding:5px 9px;font-size:10px}.mode-picker{flex-wrap:wrap;gap:6px;margin:15px 0 0;display:flex}.mode-picker button{background:0 0;border:1px solid #b9cdd1;border-radius:8px;flex:1;padding:8px;font-size:12px}.mode-picker button[aria-pressed=true]{color:#fff;background:#117f97;border-color:#117f97}.mode-picker small{color:#81969e;text-align:center;width:100%;font-size:9px}.flight-attitude{border-bottom:1px solid var(--line);color:#62808c;align-items:center;gap:16px;padding:8px 0;font-size:10px;display:flex}.flight-attitude b{color:var(--ink);font-variant-numeric:tabular-nums}.flight-attitude small{margin-left:auto;font-size:9px}#keyboard-guide{white-space:pre-line}@media (height<=500px) and (width>=600px){.intro-card .mode-picker{grid-area:4/1;margin-top:7px}.intro-card .control-guide{grid-row:1/5}.intro-card .dialog-note{grid-row:5;margin-bottom:0}.intro-card .primary-button{grid-area:5/2}.intro-card .secondary-button{grid-area:6/2}.intro-card .prototype-note{grid-row:7}.intro-card .text-button{grid-area:6/1}.mode-picker button{padding:5px}.mode-picker small{font-size:8px}.flight-attitude{padding:5px 0}}.app[data-play-mode=flight] .meters{grid-template-columns:repeat(2,minmax(0,1fr))}.flight-attitude{flex-wrap:wrap;gap:10px}.flight-attitude>span{white-space:nowrap}.flight-attitude small{font-size:8px}.flight-throttle{padding-top:10px}.throttle-heading{justify-content:space-between;align-items:baseline;gap:12px;font-size:11px;display:flex}.throttle-heading label{font-weight:600}.throttle-heading output{color:var(--teal);font-variant-numeric:tabular-nums;font-size:14px;font-weight:600}.flight-throttle>small{color:#6c8790;margin-top:-2px;font-size:9px;line-height:1.5;display:block}#throttle-input{appearance:none;cursor:pointer;width:100%;height:44px;accent-color:var(--teal);touch-action:pan-y;background:0 0;margin:0;display:block}#throttle-input:disabled{opacity:.45;cursor:default}#throttle-input::-webkit-slider-runnable-track{background:#c7dde1;border-radius:3px;height:5px}#throttle-input::-webkit-slider-thumb{appearance:none;border:5px solid var(--teal);background:#f7faf7;border-radius:50%;width:28px;height:28px;margin-top:-11.5px;box-shadow:0 1px 4px #25485a20}#throttle-input::-moz-range-track{background:#c7dde1;border-radius:3px;height:5px}#throttle-input::-moz-range-thumb{border:5px solid var(--teal);background:#f7faf7;border-radius:50%;width:18px;height:18px;box-shadow:0 1px 4px #25485a20}@media (height<=500px) and (width>=600px){.flight-throttle{padding-top:6px}.flight-throttle>small{font-size:8px}.throttle-heading{font-size:10px}.throttle-heading output{font-size:12px}}#practice-summary{cursor:pointer;color:#486d7a;min-height:30px;font-size:11px;font-weight:600;line-height:30px}.app[data-play-mode=flight] .practice-panel[open]>p{margin-bottom:7px;font-size:0}.app[data-play-mode=flight] .practice-panel[open]>p span{float:none;font-size:9px;display:block}.app[data-play-mode=flight] .practice-panel:not([open]){margin-top:7px;padding-top:3px}@media (height<=740px) and (width<=599px){.app[data-play-mode=flight] .meters{gap:12px}.app[data-play-mode=flight] .meter small{display:none}.app[data-play-mode=flight] .meter-track{margin-top:5px}.app[data-play-mode=flight] .input-line{padding-bottom:5px}.app[data-play-mode=flight] .flight-line{gap:12px;padding:6px 0}.app[data-play-mode=flight] .flight-attitude{padding:5px 0}.app[data-play-mode=flight] .flight-attitude small{display:none}.app[data-play-mode=flight] .flight-throttle{padding-top:6px}.app[data-play-mode=flight] .toolbar{margin-top:6px}.app[data-play-mode=flight] .toolbar button{padding:6px 9px}}@media (height<=500px) and (width>=600px){.app[data-play-mode=flight] .bottom-panel{width:330px;left:auto;right:20px;transform:none}.app[data-play-mode=flight] .practice-panel{left:calc(100% - 100vw + 40px);right:auto}}@media (height<=740px) and (width<=599px){.app[data-play-mode=flight] .bottom-panel{padding-top:8px;padding-bottom:8px}.app[data-play-mode=flight] .practice-panel:not([open]) #practice-summary{min-height:24px;line-height:24px}}@media (height<=500px) and (width>=600px){.mode-tag{position:absolute;top:18px;left:120px}.toast{width:260px;max-width:260px;top:78px;left:20px;transform:none}}.view-picker{text-align:left;grid-template-columns:auto 1fr 1fr;align-items:center;gap:4px 6px;margin-top:9px;display:grid}.view-picker>span{color:#6c8790;margin-right:3px;font-size:9px}.view-picker button{white-space:nowrap;background:0 0;border:1px solid #b9cdd1;border-radius:7px;min-height:28px;padding:5px 8px;font-size:10px}.view-picker button[aria-pressed=true]{color:#117f97;background:#e4f1f1;border-color:#117f97;font-weight:600}.view-picker small{color:#81969e;text-align:center;grid-column:1/-1;font-size:8px;line-height:1.5}.target-edge-marker{pointer-events:none;color:#805b20;z-index:1;background:#fffaeef2;border:1px solid #c99a49;border-radius:11px;align-items:center;gap:6px;width:100px;height:50px;padding:6px 8px;display:flex;position:absolute;transform:translate(-50%,-50%);box-shadow:0 3px 12px #61451516}.target-edge-marker svg{fill:#b78020;transform-origin:50%;flex:none;width:20px;height:25px}.edge-copy{flex-direction:column;gap:3px;min-width:0;display:flex}.edge-copy strong{white-space:nowrap;font-size:11px;font-weight:600;line-height:1.2}.edge-copy span{white-space:nowrap;font-variant-numeric:tabular-nums;font-size:8.5px;line-height:1.25}@media (height<=740px){.view-picker{gap:3px 5px;margin-top:6px}.view-picker button{min-height:25px;padding:4px 6px}.intro-card .mode-picker{margin-top:10px}.intro-card .control-guide{gap:7px;margin:12px 0}}@media (height<=500px) and (width>=600px){.intro-card .view-picker{grid-area:5/1;margin-top:6px}.intro-card .dialog-note{grid-row:6}.intro-card .text-button{grid-row:7}.intro-card .prototype-note{grid-row:8}.intro-card .view-picker small{font-size:8px}.intro-card .control-guide{margin:5px 0}}.steering-picker{text-align:left;grid-template-columns:auto 1fr 1fr;align-items:center;gap:4px 6px;margin-top:8px;display:grid}.steering-picker>span{color:#6c8790;margin-right:3px;font-size:9px}.steering-picker button{white-space:nowrap;background:0 0;border:1px solid #b9cdd1;border-radius:7px;min-height:28px;padding:5px 6px;font-size:10px}.steering-picker button[aria-pressed=true]{color:#117f97;background:#e4f1f1;border-color:#117f97;font-weight:600}.steering-picker small{color:#81969e;text-align:center;grid-column:1/-1;font-size:8px;line-height:1.5}@media (height<=900px){.app[data-play-mode=flight] .intro-card .card-symbol{display:none}}@media (height<=740px) and (width<=599px){.app[data-play-mode=flight] .intro-card{padding-top:14px;padding-bottom:12px}.app[data-play-mode=flight] .intro-card h1{margin-bottom:6px;font-size:21px;line-height:1.35}.app[data-play-mode=flight] .intro-card .mode-picker{margin-top:7px}.app[data-play-mode=flight] .intro-card .view-picker{margin-top:5px}.steering-picker{gap:3px 5px;margin-top:5px}.steering-picker button{min-height:25px;padding:4px 5px;font-size:9px}.app[data-play-mode=flight] .intro-card .control-guide{gap:6px;margin:9px 0}.app[data-play-mode=flight] .intro-card .dialog-note{margin-bottom:9px;font-size:9px;line-height:1.6}.app[data-play-mode=flight] .intro-card .prototype-note{margin-top:7px}}@media (height<=500px) and (width>=600px){.intro-card .steering-picker{grid-area:6/1;gap:3px 5px;margin-top:5px}.intro-card .steering-picker button{min-height:25px;padding:4px 5px;font-size:9px}.app[data-play-mode=flight] .intro-card{padding:15px 20px}.app[data-play-mode=flight] .intro-card h1{margin-bottom:6px;font-size:21px;line-height:1.3}.app[data-play-mode=flight] .intro-card .dialog-description{font-size:11px;line-height:1.6}.app[data-play-mode=flight] .intro-card .dialog-note{grid-row:7;font-size:9px;line-height:1.6}.app[data-play-mode=flight] .intro-card .text-button{grid-row:8}.app[data-play-mode=flight] .intro-card .prototype-note{grid-row:9}}#ground-proximity{white-space:nowrap;position:relative}#ground-height-meter{--clearance-ratio:.583333;background:#dce8e3;border-radius:3px;width:100%;height:3px;position:absolute;bottom:-6px;left:0;overflow:hidden}#ground-height-meter i{width:calc(var(--clearance-ratio)*100%);border-radius:inherit;background:#3b8870;height:100%;display:block}#ground-warning-text{white-space:nowrap;color:#3b8870;margin-left:auto;font-size:8.5px;line-height:1.3}.app[data-play-mode=flight] .flight-line{gap:10px}.app[data-play-mode=flight] #ground-proximity{color:#3b8870}#ground-proximity[data-level=low] #ground-height-meter{background:#f0e1ca;height:4px}#ground-proximity[data-level=low] #ground-height-meter i{background:#c88326}.app[data-play-mode=flight] #ground-proximity[data-level=low],#ground-proximity[data-level=low]~#ground-warning-text{color:#9b621b;font-weight:600}#ground-proximity:is([data-level=danger],[data-level=stopped]) #ground-height-meter{background:#f1d7d1;height:5px}#ground-proximity:is([data-level=danger],[data-level=stopped]) #ground-height-meter i{background:#b94736}.app[data-play-mode=flight] #ground-proximity:is([data-level=danger],[data-level=stopped]),#ground-proximity:is([data-level=danger],[data-level=stopped])~#ground-warning-text{color:#aa382c;font-weight:700}.app[data-play-mode=flight] #ground-proximity[data-level=unknown],#ground-proximity[data-level=unknown]~#ground-warning-text{color:#6c8790}#ground-proximity[data-level=unknown] #ground-height-meter i{background:#8da1a8}.ground-edge-warning{pointer-events:none;z-index:0;border:3px solid #d7913394;position:absolute;inset:0;box-shadow:inset 0 0 28px #d791331a}.ground-edge-warning:is([data-level=danger],[data-level=stopped]){border-width:4px;border-color:#bd4c3aab;box-shadow:inset 0 0 34px #bd4c3a24}.ground-edge-warning:is([data-level=clear],[data-level=unknown]){display:none}.motion-explanation{text-align:left;margin:0 0 6px}.motion-explanation>summary{color:#486d7a;cursor:pointer;min-height:24px;font-size:10px;line-height:24px}.motion-explanation[open]{border-top:1px solid var(--line);padding-top:4px}.motion-examples{grid-template-columns:repeat(2,minmax(0,1fr));gap:8px;padding:6px 0 8px;display:grid}.motion-examples figure{background:#f1f7f6;border:1px solid #c8dce0;border-radius:10px;margin:0;padding:5px 6px 7px}.motion-diagram{place-items:center;height:84px;display:grid;position:relative}.motion-arrows{fill:none;stroke:#b28634;stroke-width:1.6px;stroke-linecap:round;stroke-linejoin:round;width:100%;height:100%;position:absolute;inset:0}.motion-arrows .motion-shadow{stroke:none;fill:#a1bac42b}.motion-handset{fill:#f9fbf6;stroke:#457a88;stroke-width:1.7px;transform-origin:50%;width:46px;height:76px;transform-style:preserve-3d;display:block}.motion-handset .motion-screen{fill:#dbeef0}.motion-handset-rock{transform:perspective(210px)rotateX(58deg)rotateY(-24deg)}.motion-handset-turn{transform:perspective(210px)rotateX(58deg)rotate(-24deg)}.veil:not([hidden]) .motion-explanation[open] .motion-handset-rock{animation:2.8s ease-in-out infinite phone-rock}.veil:not([hidden]) .motion-explanation[open] .motion-handset-turn{animation:2.8s ease-in-out infinite phone-turn}.motion-examples figcaption{text-align:center;flex-direction:column;gap:4px;display:flex}.motion-examples figcaption b{font-size:11px;font-weight:600}.motion-examples figcaption span{color:#547482;font-size:9px;line-height:1.5}.motion-examples figcaption small{color:#78919b;font-size:8px;line-height:1.5}.veil:has(#motion-explanation[open]){align-items:flex-start}@keyframes phone-rock{0%,to{transform:perspective(210px)rotateX(58deg)rotateY(-24deg)}50%{transform:perspective(210px)rotateX(58deg)rotateY(24deg)}}@keyframes 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