:root{--arc-bg: #000000;--arc-surface: #0a0a0a;--arc-surface-alt: #111111;--arc-cyan: #00e5ff;--arc-pink: #ff00cc;--arc-yellow: #ffd700;--arc-green: #00ff44;--arc-text: #ffffff;--arc-text-muted: #8a8a8a;--arc-border: #333333;--arc-chrome: #1a3a4a;--cell-correct-bg: #001a00;--cell-correct-fg: #00ff44;--cell-close-bg: #1a1500;--cell-close-fg: #ffd700;--cell-wrong-bg: #1a0000;--cell-wrong-fg: #ff4444;--cell-empty-bg: #0a0a0a;--cell-empty-fg: #333333;--z-modal: 1000}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}body{background:var(--arc-bg);background-image:radial-gradient(ellipse 80% 40% at 50% 0%,rgba(0,229,255,.04) 0%,transparent 70%);color:var(--arc-text);font-family:Share Tech Mono,monospace;min-height:100vh}@media(prefers-reduced-motion:no-preference){body:after{content:"";position:fixed;inset:0;pointer-events:none;z-index:9999;background:repeating-linear-gradient(0deg,transparent,transparent 2px,rgba(0,0,0,.15) 2px,rgba(0,0,0,.15) 4px)}}@keyframes 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