:root{--halo: 0 0 8px #fff, 0 0 8px #fff, 0 0 6px #fff;--blue: #0b3fff;--blue-soft: rgba(11, 63, 255, .28);--blue-mid: rgba(11, 63, 255, .5);--blue-ghost: rgba(11, 63, 255, .08);--ring-border: clamp(10px, 2.6vmin, 20px);--tap-size: clamp(40px, 10.8vw, 50px);--ring-size: min(86vw, 58vh);--float-size: calc(var(--ring-size) / 4);--cursor-h: calc(var(--ring-size) * .2);color-scheme:light}*{box-sizing:border-box;margin:0;padding:0;-webkit-tap-highlight-color:transparent}html,body,#root{height:100%}body{background:#fff;color:var(--blue);font-family:system-ui,-apple-system,sans-serif;overscroll-behavior:none}.app{position:relative;display:flex;flex-direction:column;align-items:center;height:100dvh;padding:30px 16px calc(26px + env(safe-area-inset-bottom));gap:12px;overflow:hidden}.header{z-index:2;text-align:center;font-size:clamp(27px,7.6vw,44px);font-weight:700;line-height:1.22;letter-spacing:-.01em;text-shadow:var(--halo)}.header__frog{display:inline-block;vertical-align:-.2em;width:clamp(34px,9vw,54px);height:auto;margin:0 .28em}.stage{z-index:2;flex:1;display:flex;align-items:center;justify-content:center;min-height:0;width:100%}.prompt{z-index:2;max-width:34ch;text-align:center;font-size:clamp(17px,4.9vw,27px);font-weight:600;line-height:1.3;min-height:2.6em;color:#0b3fffd9;text-shadow:var(--halo)}.controls{z-index:2;display:flex;align-items:center;gap:12px}.ring-wrap{position:relative;width:var(--ring-size);height:var(--ring-size);flex:none}.ring{position:relative;width:100%;height:100%;border:var(--ring-border) solid 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ease}.duel__half:active{background:var(--blue-ghost)}.duel__divider{position:absolute;left:50%;top:0;bottom:0;width:var(--ring-border);margin-left:calc(var(--ring-border) / -2);background:var(--blue);pointer-events:none}.duel__text{display:block;width:100%}.duel__minutes{display:block;margin-top:.6em;font-size:.42em;font-weight:600;opacity:.6}.progress{position:fixed;left:0;right:0;bottom:0;height:4px;background:var(--blue-ghost);z-index:3;pointer-events:none}.progress__fill{width:100%;height:100%;background:var(--blue);transform-origin:left center;transition:transform .35s ease}.frog{display:flex;flex-direction:column;align-items:center;gap:12px;padding:0 12%;text-align:center}.frog__prompt{font-size:clamp(15px,4.2vw,22px);font-weight:700;line-height:1.2}.frog__stamp{width:clamp(56px,16vmin,92px);height:auto}.frog__buttons{display:flex;gap:10px;flex-wrap:wrap;justify-content:center}.frog__buttons .btn{font-size:clamp(12px,3vw,14px);padding:8px 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