:root{--bg: #2b2a33;--card: #36353f;--card-border: #4a4955;--text: #f4efe6;--muted: #b9b3a8;--accent: #f2b84b;--accent-text: #2b2a33;--danger: #ff8f7a;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}button{font:inherit;color:inherit;cursor:pointer;border:1px solid var(--card-border);background:var(--card);border-radius:12px;padding:10px 16px;min-height:44px;touch-action:manipulation}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(14px,2.2vh,18px)}.help-button{margin-left:auto;align-self:center;width:44px;padding:0;border-radius:50%;font-weight:700}.start-cards{flex:1;min-height:0;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:clamp(8px,1.5vw,18px)}.start-cards.with-continue{grid-template-columns:repeat(4,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{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)}.choice.selected{border:2px solid var(--accent);background:#4a4232}.photo-card{cursor:pointer}.photo-card-body{flex:1;min-height:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px;border:2px dashed var(--card-border);border-radius:12px;color:var(--muted);text-align:center;padding:8px}.photo-card-body p{margin:0}.puzzle-icon{width:clamp(40px,12vh,96px);height:clamp(40px,12vh,96px);color:var(--accent);opacity:.85}.continue img{flex:1;min-height:0;width:100%;object-fit:cover;border-radius:8px}.continue p{margin:0;color:var(--muted)}.start-footer{flex-shrink:0;display:flex;justify-content:center}.start-button{width:min(480px,100%);font-size:clamp(18px,3vh,24px);min-height:clamp(48px,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)}}.photo-step{position:absolute;top:0;right:0;bottom:0;left:0;z-index:5;background:var(--bg);display:flex;flex-direction:column;gap:12px;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));animation:zoom-in .32s ease-out}@keyframes zoom-in{0%{transform:scale(.25);opacity:.3}to{transform:scale(1);opacity:1}}.photo-step-header{display:flex;align-items:center;gap:16px;flex-shrink:0}.photo-step-header h2{margin:0;font-size:clamp(18px,3.4vh,28px)}.photo-step-summary{margin-left:auto;color:var(--muted)}.photo-picker{flex:1;min-height:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;border:3px dashed var(--accent);border-radius:20px;background:#2f2e37;font-size:clamp(18px,3.4vh,28px);font-weight:700}.photo-picker small{font-size:clamp(13px,2vh,16px);font-weight:400;color:var(--muted)}.photo-picker .puzzle-icon{width:clamp(64px,20vh,160px);height:clamp(64px,20vh,160px)}.hint{margin:0;color:var(--muted);font-size:14px;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:52px;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{min-height:40px;padding:6px 14px}.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:50px;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}.menu small{color:var(--muted);font-size:12px}.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:36px;color:var(--accent)}.dialog p{margin:0 0 18px;font-size:18px}.dialog-buttons{display:flex;gap:10px;justify-content:center;flex-wrap:wrap;margin-bottom:8px}.sound-panel{left:auto;right:8px;width:min(320px,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;accent-color:var(--accent);min-height:32px}.sound-choices{display:grid;grid-template-columns:1fr 1fr;gap:8px}.sound-choices .choice{min-height:64px;max-height:none}.sound-panel .file-name{max-width:100%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.toggle{min-width:72px}.toggle.on{background:var(--accent);color:var(--accent-text);border-color:var(--accent);font-weight:700}