@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+JP:wght@400;500;600;700;800&family=Space+Grotesk:wght@400;500;600;700&display=swap');
:root{--ink:#24352e;--muted:#7b8274;--paper:#f5f3eb;--line:#dedfd2;--orange:#dd5a2e;--green:#2c493d}*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font-family:'Space Grotesk','Noto Sans JP',sans-serif;font-size:13px}button,input,select{font:inherit}button,a,input,select{-webkit-tap-highlight-color:transparent}button,.file-button{cursor:pointer;border:1px solid var(--line);background:transparent;color:var(--ink);border-radius:5px;padding:11px 14px;transition:background .16s}button:hover,.file-button:hover{background:#e8e8dc}button:disabled{opacity:.4;cursor:not-allowed}button:focus-visible,a:focus-visible,input:focus-visible{outline:3px solid #e6a267;outline-offset:3px}.primary{background:var(--orange);border-color:var(--orange);color:white;font-weight:600}.primary:hover{background:#c34c24}.active{background:var(--green);border-color:var(--green);color:white}header{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:22px 3.5%;border-bottom:1px solid var(--line)}.brand{display:flex;align-items:center;gap:12px;font-size:30px;color:var(--ink);text-decoration:none;line-height:1}.brand span{font-size:18px;letter-spacing:-.6px}.brand b{font-weight:400;color:var(--orange)}.brand small{display:block;font-size:10px;letter-spacing:2px;margin-top:8px}nav{display:flex;gap:6px}nav button{border:0;background:transparent}nav button.active{background:#e4e7dd;color:var(--green)}.beta,.eyebrow{font-size:10px;letter-spacing:1.8px;font-weight:600;color:var(--muted)}main{max-width:1600px;margin:auto;padding:0 3.5%}.intro{display:flex;justify-content:space-between;align-items:center;padding:34px 0 28px}.intro h1{font-size:clamp(23px,2.5vw,38px);font-weight:500;letter-spacing:-1.4px;margin:11px 0}.intro h1 em{font-style:normal;color:var(--orange)}.intro p{line-height:1.9;color:var(--muted);font-size:12px}.workspace{display:grid;grid-template-columns:250px minmax(320px,1fr) 260px;border:1px solid var(--line);border-radius:9px;overflow:hidden;background:#faf9f3}.panel{padding:23px;display:flex;flex-direction:column;gap:15px}.controls{border-right:1px solid var(--line)}label{display:block;font-size:11px;font-weight:500}label input:not([type=range]),select{display:block;width:100%;padding:10px;margin-top:8px;background:transparent;border:1px solid var(--line);border-radius:4px;color:var(--ink)}.row{display:flex;gap:6px;align-items:center}.row button{flex:1;white-space:nowrap;font-size:11px;padding:9px 8px}.rule{height:1px;background:var(--line);margin:0}.help{font-size:10px;line-height:1.8;color:var(--muted);margin:0}input[type=range]{width:100%;accent-color:var(--orange);margin:14px 0 0;cursor:pointer}output{float:right;color:var(--orange);font-family:'Space Grotesk',sans-serif}.file-button{text-align:center;font-size:10px}.work-center{display:flex;flex-direction:column;min-width:0;background:#eeeee4}.view-label{display:flex;justify-content:space-between;padding:20px;font-size:9px;letter-spacing:1.5px;color:#788072}.view-label i{display:inline-block;width:6px;height:6px;background:var(--orange);border-radius:50%;margin-right:6px}.editor-wrap{position:relative;min-height:460px;flex:1;background-image:radial-gradient(#cdd1c4 .7px,transparent .7px);background-size:18px 18px}#editor{position:absolute;width:100%;height:100%;touch-action:none;cursor:crosshair}.paper-caption{position:absolute;left:20px;bottom:68px;right:20px;font-size:9px;color:#7c8476;pointer-events:none;letter-spacing:1px}.paper-caption b{float:right}#edit-hint{position:absolute;bottom:22px;left:10px;right:10px;text-align:center;font-size:11px;pointer-events:none}#cancel-line{position:absolute;right:12px;top:10px;background:#fff}.work-footer{border-top:1px solid var(--line);padding:16px 20px;display:flex;align-items:center;justify-content:space-between;gap:10px}.work-footer>span{font-size:10px;color:var(--orange)}.cp{color:var(--green);margin-left:8px}.analysis{border-left:1px solid var(--line)}#model-view{height:190px;width:100%;cursor:grab;touch-action:none}#model-view canvas{width:100%;height:100%;display:block}#metrics{display:grid;grid-template-columns:1fr 1fr;gap:18px 10px;border-block:1px solid var(--line);padding:20px 0}.metric span{font-size:9px;color:var(--muted);display:block}.metric strong{font-size:22px;font-weight:500;display:block;margin-top:5px}.metric small{font-size:10px;color:var(--muted)}.note{font-size:11px;line-height:1.8}.note p{color:var(--muted);font-size:10px}.analysis>button{font-size:10px}.flight-toolbar{display:flex;justify-content:space-between;gap:20px;align-items:center;margin-bottom:20px}.flight-toolbar h2{margin:8px 0;font-size:24px;font-weight:500}.compact{max-width:130px}.compact input{margin-top:3px!important;padding:6px!important}.arena-wrap{height:min(70vh,680px);min-height:420px;position:relative;border-radius:8px;overflow:hidden;background:#d7ded6}#arena{position:absolute;inset:0}#arena canvas{display:block;width:100%;height:100%;touch-action:none}.flight-top{position:absolute;left:22px;top:20px;right:22px;display:flex;justify-content:space-between;pointer-events:none;font-size:11px}.flight-top span{background:#f5f3ebdf;padding:9px 12px;border-radius:30px}#own-tag{color:var(--orange)}#flight-stats{position:absolute;left:24px;top:68px;pointer-events:none}#distance{font-size:50px;font-weight:500;display:block;letter-spacing:-2px}#distance small{font-size:18px}#flight-detail{font-size:11px}#launch-pad{position:absolute;left:50%;bottom:78px;transform:translateX(-50%);width:330px;height:160px;border:1px dashed #acb3a1;border-radius:12px;background:#f8f6eced;display:flex;align-items:center;justify-content:center;flex-direction:column;gap:9px;touch-action:none;cursor:grab;user-select:none;box-shadow:0 10px 30px #23352a17}#launch-pad>span{font-size:28px;color:var(--orange)}#launch-pad b{font-size:13px}#launch-pad small{font-size:9px;color:var(--muted)}#launch-pad output{float:none;font-size:10px}#launch-pad.locked{opacity:.6;pointer-events:none}.arena-actions{position:absolute;left:16px;right:16px;bottom:16px;display:flex;justify-content:center;gap:8px}.arena-actions button{background:#f8f6eced;font-size:11px}.flight-bottom{display:flex;justify-content:space-between;gap:15px;align-items:center;font-size:10px;color:var(--muted)}#room-panel{position:absolute;right:18px;top:70px;background:#faf9f0ef;border-radius:8px;padding:16px;width:245px;max-height:65%;overflow:auto}#room-status{font-size:12px;font-weight:600;margin-bottom:10px}#members{display:grid;gap:5px;margin-bottom:12px}#members div{display:flex;justify-content:space-between;font-size:10px;padding:5px;border-bottom:1px solid var(--line)}.you{color:var(--orange);font-weight:700}#result-board{background:#faf9f3;border:1px solid var(--line);padding:24px;border-radius:8px;margin-top:20px}table{width:100%;border-collapse:collapse;text-align:left}td,th{padding:12px 8px;border-bottom:1px solid var(--line);font-size:12px}th{font-size:10px;color:var(--muted)}footer{display:flex;justify-content:space-between;gap:15px;max-width:1600px;padding:28px 3.5%;margin:auto;font-size:10px;color:var(--muted)}footer a{color:var(--muted)}dialog{border:1px solid var(--line);border-radius:12px;background:var(--paper);color:var(--ink);padding:32px;max-width:680px;width:90vw;max-height:85vh}dialog::backdrop{background:#1b2e25a0;backdrop-filter:blur(4px)}#close-dialog{float:right;border:0;font-size:24px;padding:0 8px}dialog h2{font-size:23px;font-weight:500;margin-top:6px}dialog p{line-height:1.9;font-size:12px}dialog .saved{padding:15px 0;border-bottom:1px solid var(--line);display:flex;justify-content:space-between;gap:12px;align-items:center}dialog .saved button{padding:8px;font-size:11px}dialog a{color:var(--orange)}#toast{position:fixed;bottom:25px;left:50%;transform:translateX(-50%);background:var(--green);color:white;padding:15px 24px;border-radius:8px;z-index:20;max-width:90vw;font-size:12px;box-shadow:0 8px 30px #0003}[hidden]{display:none!important}
@media(max-width:1100px){.workspace{grid-template-columns:210px minmax(280px,1fr)}.analysis{grid-column:1/-1;border-top:1px solid var(--line);border-left:0;display:grid;grid-template-columns:200px 1fr 1fr;align-items:center}.analysis>.eyebrow,.analysis>.help{display:none}.analysis #metrics{border:0}.analysis .note{grid-column:3;grid-row:1}.analysis>button{grid-column:3}.intro p,.beta{display:none}.panel{padding:18px}.brand span{font-size:15px}}
@media(max-width:700px){header{padding:16px;flex-wrap:wrap;gap:14px}.brand{font-size:24px}nav{width:100%;justify-content:space-between}nav button{padding:9px;font-size:11px}main{padding:0 12px}.intro{padding:24px 0 18px}.intro h1{font-size:25px}.workspace{grid-template-columns:1fr}.controls{order:2;border:0;border-top:1px solid var(--line);display:grid;grid-template-columns:1fr 1fr;gap:15px}.controls>.eyebrow,.controls>.rule,.controls>.help{grid-column:1/-1}.controls>.row{align-self:end}.controls label{min-width:0}.work-center{order:1}.analysis{order:3;grid-template-columns:1fr 1fr;gap:10px}.analysis .note{grid-column:1/-1;grid-row:auto}.analysis>button{grid-column:1/-1}.editor-wrap{min-height:380px}#model-view{height:150px}.work-footer{padding:12px;font-size:9px}.work-footer .cp{display:none}.flight-toolbar{display:block}.flight-toolbar .row{flex-wrap:wrap}.flight-toolbar .compact{width:100%;max-width:100%}.arena-wrap{height:70vh;min-height:550px}.flight-top{left:10px;right:10px;font-size:8px}.flight-top span{padding:7px}.arena-actions{flex-wrap:wrap;bottom:10px;gap:4px}.arena-actions button{font-size:9px;padding:9px}#launch-pad{bottom:94px;width:280px;height:145px}#room-panel{width:170px;right:10px;max-height:220px;top:66px;padding:10px}#flight-stats{left:12px}#distance{font-size:34px}.flight-bottom{display:block}footer{font-size:8px;flex-wrap:wrap}#flight-detail{display:block;max-width:150px;font-size:9px}}
@media(max-height:550px) and (orientation:landscape){header{padding:10px 20px;flex-wrap:nowrap}header nav{width:auto}.intro{padding:10px 0}.intro h1{font-size:22px;margin:5px 0}.intro .eyebrow{display:none}.arena-wrap{height:78vh;min-height:310px}#launch-pad{width:280px;height:115px;bottom:60px}.flight-toolbar{margin-bottom:8px}.editor-wrap{min-height:340px}.flight-toolbar h2{font-size:18px}.flight-top{top:10px}#room-panel{max-height:65%;top:48px}}
body.flight-mode .intro{display:none}body.flight-mode #flight{padding-top:24px}
@media(max-height:550px) and (orientation:landscape){body.flight-mode header,body.flight-mode footer,body.flight-mode .flight-bottom{display:none}body.flight-mode main{padding:0 8px}body.flight-mode #flight{padding-top:5px}.flight-toolbar{height:45px;gap:8px;margin-bottom:5px}.flight-toolbar .eyebrow{display:none}.flight-toolbar .row{flex-wrap:nowrap}.arena-wrap{height:calc(100dvh - 62px);min-height:0}.flight-toolbar .compact{max-width:110px}.flight-top{top:8px}#flight-stats{top:45px}#distance{font-size:32px}#launch-pad{height:110px;bottom:50px;width:270px;gap:5px}.arena-actions{bottom:8px}.arena-actions button{padding:8px}#room-panel{top:44px;width:190px;font-size:10px}}
/* Folding: visible steps and explicit confirmation. */
#guide-start{border-color:#a8b6a3;background:#e9eee3;font-weight:600}#guide-status{color:#476345;font-size:11px}#fold-actions{position:absolute;left:10px;right:10px;top:8px;display:flex;align-items:center;justify-content:center;gap:6px;flex-wrap:wrap;padding:10px;background:#faf9f0f5;border:1px solid #d8dfce;border-radius:8px;z-index:2}#fold-actions span{width:100%;text-align:center;font-size:11px;color:#56704f}#fold-actions button{font-size:10px;padding:10px}#fold-actions #cancel-line{position:static;background:transparent}#edit-hint{padding:8px;background:#eeeeE4dd;border-radius:4px}
/* Side-view slingshot. Pull distance and direction, never pointer speed. */
#launch-pad{width:380px;height:230px;gap:0;padding:10px 16px;cursor:default}#launch-pad.pulling{border-style:solid;border-color:#dd5a2e;background:#faf7ef;cursor:grabbing}.pull-heading{text-align:center;pointer-events:none}.pull-heading b{display:block;font-size:13px}.pull-heading small{display:block;margin-top:4px;font-size:9px;color:#788471}#pull-svg{width:100%;height:150px;flex:1;min-height:0;overflow:visible;pointer-events:none}#power-fill{display:block;height:100%;background:#dd5a2e;border-radius:3px;width:0}.power-track{height:5px;width:100%;background:#dce3d4;border-radius:3px;margin:2px 0 7px}#throw-info{font-size:10px;pointer-events:none;float:none;text-align:center}#launch-pad .key-help{font-size:8px;margin-top:4px;color:#7b8274}#pull-ball{filter:drop-shadow(0 3px 3px #9d4d2833)}
@media(max-width:700px){#launch-pad{width:300px;height:220px;bottom:94px}.controls #guide-start,.controls #guide-status{grid-column:1/-1}}
@media(max-height:550px) and (orientation:landscape){#launch-pad{width:330px;height:190px;bottom:48px;padding:8px 14px}.pull-heading b{font-size:11px}.pull-heading small{font-size:8px}#launch-pad .key-help{display:none}#throw-info{font-size:9px}#room-panel{width:160px}}
.paper-history{display:flex;gap:8px;justify-content:center;padding:12px;border-top:1px solid var(--line);background:#faf9f3}.paper-history button{font-size:12px;min-height:44px}.paper-history button:first-child{border-color:#9cac92;background:#e3eadc;font-weight:600}#editor{cursor:grab}#editor:active{cursor:grabbing}
#trial-comparison{padding:18px;background:#e5ecdE;border:1px solid #cbd7c3;border-radius:8px;margin-top:16px;font-size:12px;line-height:1.8}
/* Keep the actual paper in view instead of stretching it with the settings column. */
.work-center{align-self:start;position:sticky;top:12px}.editor-wrap{flex:none;height:clamp(360px,62vh,620px);min-height:0}.view-label{padding:14px 18px}.paper-tools{display:flex;flex-wrap:wrap;gap:5px;padding:8px 12px;background:#faf9f3;border-block:1px solid var(--line)}.paper-tools button{padding:8px 10px;min-height:40px;font-size:11px}.paper-tools select{margin:0;width:auto;max-width:160px;font-size:11px;padding:8px}.paper-caption{bottom:58px}#edit-hint{bottom:8px;font-size:11px;line-height:1.6;background:#f7f8f0ed;border:1px solid #d5ddce;min-height:38px}.work-footer>span{display:none}.work-footer{justify-content:flex-end}.paper-history{padding:9px}.paper-history button{font-size:11px}.editor-wrap,#editor{user-select:none;-webkit-user-select:none}#editor:focus{outline:none}#editor:focus-visible{outline:2px solid #d49660;outline-offset:-2px}
@media(max-width:1100px){.workspace{grid-template-columns:220px minmax(300px,1fr)}}
@media(max-width:700px){.workspace{grid-template-columns:1fr}.work-center{position:static}.editor-wrap{height:clamp(360px,58dvh,530px)}.paper-tools{padding:6px;gap:4px}.paper-tools button{padding:7px 9px}.paper-tools select{max-width:130px}.intro{padding:12px 0 8px}.intro h1{font-size:22px}}
#bend-controls{padding:8px 14px;background:#eaf0f3;border-bottom:1px solid #c7d6df;display:grid;grid-template-columns:120px 1fr;gap:6px 12px;align-items:center}#bend-controls label{font-size:11px}#bend-controls input{margin:0;accent-color:#327ab2}#bend-controls>div{grid-column:1/-1;display:flex;gap:6px}#bend-controls button{font-size:10px;padding:5px 10px;background:#f7fafb}#bend-value{color:#327ab2}#paper-bend.active{background:#327ab2;border-color:#327ab2}

#plane-guide{padding:12px 16px;background:#fff5df;border-bottom:1px solid #e2cda5;color:#463e2a}#plane-guide .guide-heading{display:flex;align-items:center;justify-content:space-between;margin-bottom:6px;font-size:10px;letter-spacing:1px;color:#947440}#plane-guide strong{display:block;font-size:16px}#plane-guide p{font-size:11px;line-height:1.7;margin:6px 0 10px}#plane-guide button{font-size:11px;padding:8px 12px}#plane-guide-close{padding:3px 8px!important;font-size:10px!important}.guide-buttons{display:flex;justify-content:space-between;gap:8px}.guide-progress{margin-bottom:10px}.guide-progress input{margin-top:6px}#plane-guide-count{font-weight:700}body.guiding #bend-controls{display:none}body.guiding .editor-wrap{height:clamp(350px,53vh,560px)}body.guiding #paper-layer,body.guiding #paper-magnet{display:none}body.guiding .paper-tools{gap:4px}#paper-turn[aria-pressed=true]{background:#c5dbd1;border-color:#829e90}#guide-start-top{border-color:#a8b6a3;background:#e9eee3}.guide-preview{font-size:10px;color:#817557}