:root{--bg: #2b2a33;--card: #36353f;--card-border: #4a4955;--control-border: #8a8897;--text: #f4efe6;--muted: #b9b3a8;--accent: #f2b84b;--accent-text: #2b2a33;--danger: #ff8f7a;--tap: 56px;color-scheme:dark;font-family:system-ui,-apple-system,Hiragino Sans,Yu Gothic UI,Meiryo,sans-serif}*{box-sizing:border-box}html,body{margin:0;height:100%;overflow:hidden;background:var(--bg);color:var(--text);touch-action:manipulation}#root{position:fixed;top:0;right:0;bottom:0;left:0;height:100%;height:100dvh;overflow:hidden}body{-webkit-user-select:none;user-select:none;-webkit-touch-callout:none;-webkit-tap-highlight-color:transparent;overscroll-behavior:none;word-break:keep-all;overflow-wrap:break-word}button{font:inherit;color:inherit;cursor:pointer;border:1px solid var(--control-border);background:var(--card);border-radius:12px;padding:10px 16px;min-height:var(--tap);touch-action:manipulation;transition:transform .08s ease-out,filter .08s ease-out}button:active:not(:disabled){transform:scale(.95);filter:brightness(1.3)}button.primary:active:not(:disabled){filter:brightness(.88)}button:disabled{opacity:.45;cursor:default}button.primary{background:var(--accent);color:var(--accent-text);border-color:var(--accent);font-weight:700}button.link{background:none;border:none;color:var(--muted);text-decoration:underline}.start{position:absolute;top:0;right:0;bottom:0;left:0;display:flex;flex-direction:column;gap:clamp(8px,2vh,18px);padding:clamp(10px,2.5vh,24px) max(clamp(12px,2.5vw,32px),env(safe-area-inset-right)) max(clamp(10px,2.5vh,24px),env(safe-area-inset-bottom)) max(clamp(12px,2.5vw,32px),env(safe-area-inset-left));overflow:hidden}.start-header{display:flex;align-items:baseline;gap:14px;flex-shrink:0}.start-header h1{margin:0;font-size:clamp(28px,6vh,48px);letter-spacing:.08em;color:var(--accent);line-height:1}.start-header p{margin:0;color:var(--muted);font-size:clamp(15px,2.2vh,18px)}.help-button{margin-left:auto;align-self:center;width:var(--tap);padding:0;border-radius:50%;font-size:24px;font-weight:700}.start-cards{flex:1;min-height:0;display:grid;grid-template-columns:minmax(0,1.5fr) repeat(2,minmax(0,1fr));gap:clamp(8px,1.5vw,18px)}.start-cards.with-continue{grid-template-columns:minmax(0,1fr) minmax(0,1.5fr) repeat(2,minmax(0,1fr))}.card{background:var(--card);border:1px solid var(--card-border);border-radius:16px;padding:clamp(10px,2vh,18px);min-height:0;display:flex;flex-direction:column;gap:clamp(6px,1.4vh,12px)}.card h2{margin:0;font-size:clamp(15px,2.6vh,20px)}.choice-list{flex:1;min-height:0;display:flex;flex-direction:column;gap:clamp(6px,1.2vh,10px)}.choice{position:relative;flex:1;max-height:120px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;padding:6px 10px}.choice strong{font-size:clamp(15px,2.6vh,20px)}.choice small{color:var(--muted);font-size:16px}.choice.selected{border:3px solid var(--accent);background:#4a4232}.choice.selected:after{content:"✓";content:"✓" / "";position:absolute;top:6px;right:6px;width:26px;height:26px;display:flex;align-items:center;justify-content:center;border-radius:50%;background:var(--accent);color:var(--accent-text);font-size:16px;font-weight:700}.grid-icon{flex-shrink:0;margin-top:4px;color:var(--muted)}.choice.selected .grid-icon{color:var(--accent)}.card.continue{border:2px solid var(--accent)}.continue img{flex:1;min-height:0;width:100%;object-fit:contain;border-radius:8px}.continue p{margin:0;color:var(--muted)}.progress{flex-shrink:0;height:10px;border-radius:5px;background:var(--bg);overflow:hidden}.progress div{height:100%;background:var(--accent)}.continue-button{font-size:clamp(18px,3vh,22px);min-height:clamp(var(--tap),8vh,64px)}.start-footer{flex-shrink:0;display:flex;flex-direction:column;align-items:center;gap:6px}.start-button{width:min(480px,100%);font-size:clamp(18px,3vh,24px);min-height:clamp(var(--tap),8vh,64px)}@media(orientation:portrait){.start-cards,.start-cards.with-continue{grid-template-columns:repeat(2,minmax(0,1fr));grid-auto-rows:minmax(0,1fr)}.start-cards:not(.with-continue) .picture-card{grid-column:1 / -1;--tile-min: 220px}}.picture-grid{flex:1;min-height:0;margin:0;padding:4px;list-style:none;display:grid;grid-template-columns:repeat(auto-fill,minmax(min(var(--tile-min, 140px),calc(50% - 8px)),1fr));gap:clamp(8px,1.2vw,14px);align-content:start;overflow-y:auto;overscroll-behavior:contain;-webkit-overflow-scrolling:touch;touch-action:pan-y}.picture-tile{position:relative;display:block;width:100%;min-height:0;padding:0;overflow:hidden;border:3px solid var(--control-border);border-radius:14px;background:var(--card)}.picture-tile img{display:block;width:100%;height:100%;object-fit:cover;pointer-events:none}.picture-tile:hover:not(:disabled){border-color:var(--accent)}.picture-tile.selected{border:5px solid var(--accent)}.picture-check{position:absolute;top:6px;right:6px;width:32px;height:32px;display:flex;align-items:center;justify-content:center;border-radius:50%;background:var(--accent);color:var(--accent-text);font-size:20px;font-weight:700}.picture-empty{flex:1;margin:0;display:flex;align-items:center;justify-content:center;color:var(--muted);font-size:clamp(18px,3.4vh,28px)}.hint{margin:0;color:var(--muted);font-size:16px;text-align:center}.error{margin:0;color:var(--danger);text-align:center}.dialog.howto{text-align:left}.howto h2{margin:0 0 8px}.howto ul{margin:0 0 16px;padding-left:1.2em;line-height:1.7}.play{position:absolute;top:0;right:0;bottom:0;left:0;display:flex;flex-direction:column}.hud{position:relative;height:64px;flex-shrink:0;display:flex;align-items:center;gap:8px;padding:4px max(8px,env(safe-area-inset-right)) 4px max(8px,env(safe-area-inset-left));border-bottom:1px solid #3d3c47}.hud-button{padding:6px 16px}.hud-status{flex:1;display:flex;justify-content:center;gap:20px;font-size:16px;white-space:nowrap}.hud-status strong{color:var(--accent);font-size:20px}.hud-time{font-variant-numeric:tabular-nums}.menu-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;z-index:10}.menu{position:absolute;top:62px;left:8px;z-index:11;display:flex;flex-direction:column;gap:6px;padding:8px;background:var(--card);border:1px solid var(--card-border);border-radius:14px;box-shadow:0 8px 24px #0006}.menu button{text-align:left;display:flex;flex-direction:column;justify-content:center}.menu small{color:var(--muted);font-size:15px}.board{flex:1;min-height:0;position:relative;margin:0 env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left)}.board canvas{position:absolute;top:0;right:0;bottom:0;left:0;width:100%;height:100%;display:block;touch-action:none}.overlay{position:fixed;top:0;right:0;bottom:0;left:0;z-index:20;display:flex;align-items:center;justify-content:center;background:#00000073;padding:16px}.dialog{background:var(--card);border:1px solid var(--card-border);border-radius:18px;padding:24px;text-align:center;max-width:420px;width:100%}.dialog.clear h2{margin:0 0 6px;font-size:56px;color:var(--accent);animation:pop .5s ease-out}@keyframes pop{0%{transform:scale(.3);opacity:0}70%{transform:scale(1.15);opacity:1}to{transform:scale(1)}}.confetti{position:fixed;top:0;right:0;bottom:0;left:0;z-index:21;overflow:hidden;pointer-events:none}.confetti i{position:absolute;top:-24px;width:10px;height:16px;border-radius:2px;animation-name:confetti-fall;animation-timing-function:linear;animation-fill-mode:forwards}@keyframes confetti-fall{to{transform:translate(var(--drift),calc(100vh + 48px)) rotate(var(--spin))}}@media(prefers-reduced-motion:reduce){.confetti{display:none}.dialog.clear h2{animation:none}}.dialog p{margin:0 0 18px;font-size:18px}.dialog.confirm h2{margin:0 0 10px;font-size:24px}.dialog-buttons{display:flex;gap:10px;justify-content:center;flex-wrap:wrap;margin-bottom:8px}.sound-panel{left:auto;right:8px;width:min(400px,calc(100vw - 16px));gap:10px;padding:12px}.sound-row{display:flex;align-items:center;justify-content:space-between;gap:12px}.sound-row input[type=range]{flex:1;min-height:var(--tap);margin:0;background:transparent;-webkit-appearance:none;-moz-appearance:none;appearance:none}.sound-row input[type=range]::-webkit-slider-runnable-track{height:8px;border-radius:4px;background:linear-gradient(to right,var(--accent) var(--fill, 50%),var(--control-border) var(--fill, 50%))}.sound-row input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;-moz-appearance:none;appearance:none;width:20px;height:20px;margin-top:-9px;border:3px solid var(--card);border-radius:50%;background:var(--accent)}.sound-row input[type=range]::-moz-range-track{height:8px;border-radius:4px;background:var(--control-border)}.sound-row input[type=range]::-moz-range-progress{height:8px;border-radius:4px;background:var(--accent)}.sound-row input[type=range]::-moz-range-thumb{width:20px;height:20px;border:3px solid var(--card);border-radius:50%;background:var(--accent)}.sound-choices{display:grid;grid-template-columns:1fr 1fr;gap:8px}.sound-choices .choice{min-height:64px;max-height:none;padding-top:30px}.sound-choices .choice strong{font-size:18px}.sound-panel .file-name{max-width:100%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.toggle{min-width:80px;align-items:center}.toggle.on{background:var(--accent);color:var(--accent-text);border-color:var(--accent);font-weight:700}button:focus-visible,input:focus-visible,[role=dialog]:focus-visible{outline:3px solid var(--accent);outline-offset:2px}