:root{--ink:#f4efe4;--ink-dim:#b9b3a6;--glass:#10141cb8;--glass-strong:#0e1118e6;--line:#ffffff1f;--gold:#e8b85a;--cyan:#38e4ff;--danger:#ff6b57;--radius:14px;color:var(--ink);background:#0c0f14;font-family:Segoe UI,system-ui,-apple-system,Roboto,sans-serif}*{box-sizing:border-box}html,body,#root,.app{height:100%;margin:0;overflow:hidden}body{background:#0c0f14}.stage{position:fixed;inset:0}@media (width>=821px){.in-game .stage{right:278px}.in-game .hud-top,.in-game .hud-bottom,.in-game .check-banner,.in-game .duel-card{left:calc(50% - 139px)}}button{font:inherit;color:inherit}.btn{border:1px solid var(--line);cursor:pointer;background:#ffffff0f;border-radius:10px;padding:9px 14px;font-size:14px;transition:background .15s,border-color .15s,transform 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var(--gold);flex-wrap:wrap;justify-content:center;align-items:center;gap:10px;max-width:calc(100vw - 32px);padding:10px 14px;font-size:14px;display:flex;position:fixed;left:50%;transform:translate(-50%);box-shadow:0 12px 40px #00000073}