:root{color-scheme:dark;--page-bg: #05070d;--canvas-edge: #243244}*{box-sizing:border-box}html,body{width:100%;min-height:100%;margin:0}body{display:grid;place-items:center;overflow:hidden;background:radial-gradient(circle at 50% 45%,rgba(40,66,96,.24),transparent 46%),linear-gradient(160deg,#05070d,#0b0f17 48%,#070812);color:#f4fbff;font-family:Segoe UI,Arial,Helvetica,sans-serif}.game-shell{display:grid;place-items:center;width:100vw;height:100vh;padding:16px}#gameCanvas{grid-area:1 / 1;display:block;width:min(100%,133.3333vh);max-width:960px;height:auto;max-height:calc(100vh - 32px);aspect-ratio:4 / 3;background:#05070d;border:1px solid var(--canvas-edge);box-shadow:0 20px 70px #0000007a}.app-status{grid-area:1 / 1;z-index:1;margin:0;color:#8fa8ba;font-size:.95rem;pointer-events:none}.app-status[hidden]{display:none}.app-error{z-index:2;width:min(720px,calc(100vw - 32px));max-height:calc(100vh - 32px);margin:0;padding:20px;overflow:auto;color:#ffced6;white-space:pre-wrap;background:#19050bf5;border:1px solid #ff6b6b}