*{margin:0;padding:0;box-sizing:border-box}:root{--red: #e74c3c;--red-dark: #c0392b;--yellow: #f1c40f;--yellow-dark: #d4ac0d;--blue: #3498db;--blue-dark: #2980b9;--bg: #0f1419;--surface: #1a2332;--surface-hover: #243447;--border: #2d3e50;--text: #ecf0f1;--text-muted: #95a5a6}html,body,#app{width:100%;min-height:100vh}body{display:flex;align-items:center;justify-content:center;background:var(--bg);font-family:Segoe UI,system-ui,-apple-system,sans-serif;color:var(--text)}.screen{display:flex;flex-direction:column;align-items:center;justify-content:center;width:100%;min-height:100vh;gap:1.5rem;padding:1.5rem}.game-title{font-size:2.5rem;font-weight:800;background:linear-gradient(135deg,var(--red),var(--yellow));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;margin-bottom:.5rem}.subtitle{color:var(--text-muted);font-size:.95rem;text-align:center;max-width:320px}.btn{padding:.85rem 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