@import url('data:text/css,');
:root{font-family:ui-rounded,'Hiragino Maru Gothic ProN','Noto Sans',system-ui,sans-serif;color:#243c4b;background:#f6f4eb;font-synthesis:none}*{box-sizing:border-box}body{margin:0;background:radial-gradient(ellipse at 0 20%,#e4eee7,transparent 50%),radial-gradient(ellipse at 100% 60%,#f4e6db,transparent 60%)}main{max-width:650px;margin:auto;padding:22px 22px 30px}header{display:flex;align-items:center;justify-content:space-between}.brand{font-size:14px;font-weight:900;letter-spacing:2px;color:inherit;text-decoration:none}.brand span{font-weight:400;font-size:10px;display:block;letter-spacing:5px;margin-top:3px}button{font:inherit;cursor:pointer;border:1px solid #d4dcd5;background:#fffdf6;color:#284452;border-radius:12px;padding:12px 15px;min-height:44px;touch-action:manipulation}button:focus-visible,canvas:focus-visible{outline:3px solid #df9448;outline-offset:3px}button:disabled{opacity:.4;cursor:default}.round{border-radius:50%;width:44px;padding:0}.intro{padding:27px 0 22px}.eyebrow{font-size:10px;font-weight:800;letter-spacing:2px;color:#6b817e}h1{font-size:31px;margin:9px 0 8px;letter-spacing:-1px}h1 span{font-size:22px}p{font-size:13px;line-height:1.7}.intro p{color:#7c8987;margin:0}nav{display:flex;gap:6px;margin-bottom:19px;overflow-x:auto;padding:4px 1px 8px}nav button{flex:0 0 43px;padding:0;border-radius:50%;height:43px;font-size:12px;position:relative}nav button.active{background:#284b59;color:#fff;border-color:#284b59;box-shadow:0 4px 10px #284b5922}nav button.done:after{content:'•';color:#65aa89;position:absolute;bottom:0;right:4px}.game{background:#fffdf8;border:1px solid #e1e3d8;border-radius:24px;padding:20px;box-shadow:0 12px 32px #304f4220}.stage-head{display:flex;justify-content:space-between;align-items:center}h2{font-size:21px;margin:7px 0}.pill{font-size:10px;padding:7px 10px;border:1px solid #c5d7d0;border-radius:30px;background:#edf4ed;white-space:nowrap}#lesson{color:#72807d;min-height:40px;margin:7px 0 13px}.canvas-wrap{position:relative;border-radius:17px;overflow:hidden;background:#eaf1e8;border:1px solid #dbe5d9}canvas{width:100%;aspect-ratio:8/6;display:block;touch-action:none;user-select:none;-webkit-user-select:none}.status{display:flex;justify-content:space-between;color:#7b8985;font-size:11px;padding:13px 2px}.toolbar{display:grid;grid-template-columns:1fr 1.3fr 1fr;gap:7px}.toolbar button{font-size:12px;padding:10px 3px}#message{min-height:20px;color:#ae7040;font-size:11px;margin:8px 0}.legend{display:flex;gap:13px;justify-content:center;flex-wrap:wrap;font-size:10px;color:#81908a;border-top:1px solid #eef0e7;padding-top:13px}.legend i{display:inline-block;width:8px;height:8px;border-radius:50%;margin-right:4px}.blue{background:#75b9d0}.pink{background:#e9a1a0}details{font-size:12px;line-height:1.7;margin:10px 0}summary{cursor:pointer;color:#75867e;min-height:32px}ol{padding-left:22px}li{margin:7px 0;word-break:break-all}small{font-size:10px;color:#89948d}.controls{margin-top:18px}#arrows{display:flex;gap:7px;flex-wrap:wrap}footer{text-align:center;font-size:10px;color:#96a198;line-height:2;margin:24px 0}footer span{font-weight:800;letter-spacing:2px}#win{position:absolute;inset:0;background:#e9f0e6d9;backdrop-filter:blur(4px);display:grid;place-items:center}#win[hidden]{display:none}.win-card{text-align:center;padding:20px}.win-card>span{font-size:11px;color:#659b7e;letter-spacing:3px}.primary{background:#2f5661;color:#fff;border:0}dialog{max-width:440px;width:90%;border:1px solid #e0e7db;border-radius:23px;padding:27px;background:#fffdf8;color:#284452}dialog::backdrop{background:#243c4b70}dialog p{line-height:1.85}dialog button{width:100%}@media(max-width:440px){main{padding:16px 12px}.intro{padding:20px 5px 16px}h1{font-size:27px}h1 span{font-size:19px}.game{padding:13px;border-radius:19px}h2{font-size:18px}nav{gap:5px;margin-bottom:10px}.intro .eyebrow{font-size:9px}.legend{gap:10px}#lesson{min-height:38px;font-size:12px}.toolbar button{font-size:11px}}@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important}}

.drag-options{display:flex;align-items:center;justify-content:center;gap:7px;margin:12px 0 0;font-size:11px}.drag-options button{font-size:11px;padding:8px 10px}.drag-options button[aria-pressed=true]{background:#284b59;color:#fff;border-color:#284b59}#dragNote{font-size:10px;color:#72807d;text-align:center;margin:5px 0 14px;min-height:18px}

/* v8: one-screen gameplay. Gallery pages retain their independent layouts. */
html:has(.play-page){height:100%;overscroll-behavior:none}
.play-page{height:100%;overflow:hidden;overscroll-behavior:none}
.play-shell{width:100%;max-width:1000px;height:100svh;height:100dvh;margin:0 auto;display:flex;flex-direction:column;gap:4px;padding:max(4px,env(safe-area-inset-top)) max(6px,env(safe-area-inset-right)) max(4px,env(safe-area-inset-bottom)) max(6px,env(safe-area-inset-left))}
.play-header{flex:0 0 44px;padding:0 6px;gap:8px}
.play-header .brand{font-size:16px;letter-spacing:0;white-space:nowrap}.play-header .brand span{display:inline;margin-left:6px;font-size:11px;letter-spacing:0}
.header-actions{display:flex;gap:6px}.header-actions button{padding:8px 12px;font-size:12px}.header-actions .round{padding:0}
.play-page .game{flex:1;min-height:0;padding:0;display:flex;flex-direction:column;gap:4px;border:0;border-radius:0;background:none;box-shadow:none}
.stage-info{padding:0 6px;flex:none}.play-page .stage-head{gap:6px;min-height:42px}.play-page h1{font-size:18px;line-height:1.25;letter-spacing:0;margin:2px 0 0}.play-page .eyebrow{font-size:10px;letter-spacing:1px}.play-page .pill{font-size:11px;padding:5px 8px}
.play-page #lesson{margin:3px 0 0;min-height:0;height:20px;line-height:20px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;font-size:12px;color:#60756f}
#playfield{flex:0 1 auto;height:calc((min(100vw,1000px) - 14px)*.75 + 2px);width:100%;min-height:0;display:grid;place-items:center;overflow:hidden}
.play-page .canvas-wrap{flex:none;max-width:100%;border-radius:10px;border:1px solid #8d9f9e;box-shadow:0 6px 20px #233d3b1a}
.play-page #board{width:100%;height:auto;aspect-ratio:8/6;touch-action:none;image-rendering:pixelated}
.action-panel{flex:none;padding:0 6px}.play-page .status{padding:5px 0 7px;font-size:12px;gap:8px;color:#536d64}.play-page .toolbar{gap:7px;grid-template-columns:1fr 1.2fr 1fr}.play-page .toolbar button{font-size:13px;min-height:44px;padding:8px 3px}.play-page #message{font-size:11px;line-height:16px;height:32px;min-height:0;margin:3px 0 0;overflow:hidden}
.play-page .win-card{padding:10px}.play-page .win-card h2{font-size:19px}.play-page .win-card p{margin:5px 0}
.play-page dialog{max-height:calc(100dvh - 24px);overflow:auto;overscroll-behavior:contain;padding:18px}.dialog-head{display:flex;align-items:center;justify-content:space-between;gap:8px}.dialog-head h2{font-size:18px}.dialog-head button{font-size:12px;padding:8px 12px}
#stageDialog #levels{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;overflow:visible;margin:12px 0 0;padding:0}#stageDialog #levels button{height:48px;border-radius:12px;font-size:14px}
.play-page footer{font-size:10px;margin:16px 0 0}.play-page .controls{margin:12px 0}.play-page #arrows{gap:5px}.play-page #arrows button{min-width:44px}
@media(orientation:landscape) and (max-height:500px){
 .play-shell{gap:2px}.play-header{flex-basis:44px}.play-page .game{display:grid;grid-template-columns:minmax(0,1fr) 220px;grid-template-rows:auto minmax(0,1fr);gap:6px 8px}
 .stage-info{grid-column:2;grid-row:1}.play-page .stage-head{display:block}.play-page .pill{display:inline-block;margin-top:5px}.play-page #lesson{height:auto;max-height:40px;white-space:normal;line-height:20px}
 #playfield{grid-column:1;grid-row:1/3;height:100%;min-width:0}.action-panel{grid-column:2;grid-row:2;align-self:start}.play-page .status{flex-wrap:wrap;gap:4px}.play-page .toolbar{grid-template-columns:1fr 1fr}.play-page #hint{grid-column:1/3}.play-page #message{height:48px}
}
.play-page .dialog-head button{width:auto;flex:none}.play-page #arrows button{width:auto}
.play-page #tapControls{margin:0;padding:0}.play-page #tapControls[hidden]{display:none}.play-page #tapControls summary{min-height:24px;line-height:24px}.play-page #arrows{display:grid;grid-template-columns:repeat(5,1fr);gap:4px}.play-page #arrows button{padding:4px;min-height:44px}.play-page #tapControls #drop{grid-column:4/6}
@media(orientation:landscape) and (max-height:500px){.play-page:has(#tapControls[open]) .game{grid-template-columns:minmax(0,1fr) 320px}.play-page:has(#tapControls[open]) .toolbar{grid-template-columns:1fr 1.2fr 1fr}.play-page:has(#tapControls[open]) #hint{grid-column:auto}.play-page:has(#tapControls[open]) #message{height:16px}}