:root{font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;color:#1d1d1f;background:#f5f5f7;color-scheme:light}
*{box-sizing:border-box}html,body{margin:0;width:100%;height:100%;overflow:hidden}body{display:flex;align-items:center;justify-content:center;overscroll-behavior:none}
#stage{position:relative;flex:none}#game{display:block;touch-action:none;outline:none}#loading{position:absolute;inset:40% 0;text-align:center;font-size:17px}
#safe-area{position:fixed;pointer-events:none;visibility:hidden;padding-bottom:env(safe-area-inset-bottom,0px);padding-left:env(safe-area-inset-left,0px);padding-right:env(safe-area-inset-right,0px)}
#toast{position:fixed;z-index:20;left:50%;bottom:max(28px,env(safe-area-inset-bottom));transform:translateX(-50%);width:max-content;max-width:min(90vw,420px);background:#1d1d1f;color:#fff;padding:13px 20px;border-radius:20px;font-size:15px;text-align:center;pointer-events:none}
dialog{width:min(360px,calc(100% - 32px));margin:auto;border:1px solid #e3e3e8;border-radius:24px;padding:24px;background:#fff;color:#1d1d1f;box-shadow:0 18px 64px #1d1d1f20}dialog::backdrop{background:#1d1d1f55}
form{display:grid;gap:16px}label,h2{font-size:20px;font-weight:600;margin:0}p{font-size:14px;line-height:1.55;color:#697281;margin:0}
input{width:100%;font:inherit;font-size:18px;border:1px solid #e3e3e8;border-radius:12px;padding:14px;color:inherit;background:#fafafc;outline-color:#0071e3}
button{min-height:48px;border:0;border-radius:24px;padding:12px 20px;font-family:inherit;font-size:16px;font-weight:600;line-height:1.2;color:#fff;background:#0071e3;cursor:pointer}button:active{transform:scale(.98)}button.secondary{background:#eaf3ff;color:#0071e3}.actions{display:flex;gap:12px}.actions button{flex:1}
@media(prefers-reduced-motion:reduce){button:active{transform:none}}