:root{--bg-primary: #ffffff;--bg-secondary: #f5f5f7;--bg-tertiary: #e8e8ed;--text-primary: #1d1d1f;--text-secondary: #86868b;--text-tertiary: #aeaeb2;--accent: #0a84ff;--accent-hover: #409cff;--border: rgba(0, 0, 0, .08);--shadow: rgba(0, 0, 0, .1);--space-xs: 4px;--space-sm: 8px;--space-md: 16px;--space-lg: 24px;--space-xl: 32px;--space-2xl: 48px;--font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;--font-mono: "SF Mono", "Fira Code", Consolas, monospace;--font-reader: "Inter", sans-serif;--font-size-reader: 48px;--transition-fast: .15s ease;--transition-normal: .25s ease;--transition-slow: .4s ease;--radius-sm: 6px;--radius-md: 12px;--radius-lg: 16px;--radius-full: 9999px}[data-theme=dark]{--bg-primary: #000000;--bg-secondary: #1c1c1e;--bg-tertiary: #2c2c2e;--text-primary: #f5f5f7;--text-secondary: #98989d;--text-tertiary: #636366;--accent: #0a84ff;--accent-hover: #409cff;--border: rgba(255, 255, 255, .1);--shadow: rgba(0, 0, 0, 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var(--border);padding-top:var(--space-lg);line-height:1.5}.about-modal__credits strong{color:var(--text-primary);display:block;margin-bottom:var(--space-xs)}.about-modal__credits a{color:var(--accent);text-decoration:none}.about-modal__credits a:hover{text-decoration:underline}.about-modal__shortcuts{display:grid;grid-template-columns:1fr 1fr;gap:var(--space-md);margin-top:var(--space-md)}.about-modal__shortcut-item{display:flex;justify-content:space-between;align-items:center;font-size:13px;color:var(--text-secondary)}.about-modal__shortcut-item kbd{background:var(--bg-tertiary);border:1px solid var(--border);border-radius:var(--radius-sm);padding:2px 6px;font-family:var(--font-mono);font-size:11px;color:var(--text-primary);box-shadow:0 1px 0 var(--shadow)}.about-modal__note{font-size:13px;color:var(--text-secondary);line-height:1.5;background:var(--bg-tertiary);padding:var(--space-md);border-radius:var(--radius-md);margin-top:var(--space-md)}.about-modal__note 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