:root{--green: #6fae4a;--green-deep: #2e4a2a;--beige: #f5e6c8;--paper: #fbf3dd;--orange: #ff8a50;--orange-soft: #ffb37a;--brown: #8a5a33;--ink: #3b2f23;--shadow: rgba(46, 32, 18, .35)}*{box-sizing:border-box}html,body{margin:0;padding:0;height:100%;background:#1a2e1a;overflow:hidden;font-family:PingFang SC,Hiragino Sans GB,Microsoft YaHei,Noto Sans SC,system-ui,sans-serif;color:var(--ink);-webkit-tap-highlight-color:transparent}#game canvas{display:block;margin:0 auto;image-rendering:pixelated}#ui-root{position:fixed;inset:0;pointer-events:none;z-index:10}.overlay{position:absolute;inset:0;pointer-events:none}.overlay>*{pointer-events:auto}button{font-family:inherit;cursor:pointer;border:2px solid var(--brown);background:var(--beige);color:var(--ink);border-radius:6px;padding:6px 14px;font-size:14px;box-shadow:0 2px 0 var(--shadow);transition:transform .08s,filter 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