:root{--primary-color: #3b82f6;--secondary-color: #6b7280;--success-color: #10b981;--danger-color: #ef4444;--background: #f9fafb;--surface: #ffffff;--text-primary: #1f2937;--text-secondary: #6b7280;--border: #e5e7eb}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;background-color:var(--background);color:var(--text-primary);line-height:1.6;min-height:100vh}.container{max-width:1024px;margin:0 auto;padding:2rem}header{margin-bottom:3rem;text-align:center;position:relative}.header-container{display:flex;flex-direction:column;align-items:center}.header-nav{display:flex;gap:1rem;justify-content:flex-end;align-items:center;width:100%;margin-bottom:2rem;flex-wrap:wrap}.header-nav button{margin:0;padding:.6rem 1.2rem;font-size:.95rem}header h1{font-size:2rem;margin-bottom:.5rem;color:var(--text-primary)}header 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#0000001a}.score-display{margin-bottom:2rem}.score-display h2{font-size:1.5rem;margin-bottom:1.5rem;color:var(--text-primary)}.score-circle{font-size:4rem;font-weight:700;color:var(--primary-color);margin-bottom:1rem}.score-display p{font-size:1.1rem;color:var(--text-secondary);margin-bottom:2rem}.new-best{color:var(--success-color)!important;font-weight:600!important;font-size:1.2rem!important}.how-to-play-container{background:var(--surface);border:1px solid var(--border);border-radius:8px;padding:2rem;box-shadow:0 1px 3px #0000001a;max-width:800px;margin:0 auto}.how-to-section{margin-bottom:2.5rem}.how-to-section h2{font-size:1.5rem;margin-bottom:1rem;color:var(--primary-color);border-bottom:2px solid var(--border);padding-bottom:.5rem}.how-to-section ol{margin-left:1.5rem;line-height:1.8}.how-to-section ol li{margin-bottom:1rem;color:var(--text-primary)}.how-to-section ul{margin-left:1.5rem;line-height:1.8}.how-to-section ul 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