:root{--color-primary: #4f46e5;--color-primary-hover: #4338ca;--color-success: #16a34a;--color-danger: #dc2626;--color-warning: #d97706;--color-neutral: #6b7280;--color-bg: #f8f9fa;--color-surface: #ffffff;--color-border: #e5e7eb;--color-text: #1a1a2e;--color-text-muted: #6b7280;--radius: 8px;--shadow: 0 1px 3px rgba(0,0,0,.1), 0 1px 2px rgba(0,0,0,.06);--shadow-md: 0 4px 6px rgba(0,0,0,.07), 0 2px 4px rgba(0,0,0,.06);--max-width: 720px;--transition: all .2s ease}*{box-sizing:border-box;margin:0;padding:0}html{-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,system-ui,sans-serif;background:var(--color-bg);color:var(--color-text);line-height:1.6;font-size:1rem}a{color:inherit;text-decoration:none}h1{font-size:2rem;font-weight:700;line-height:1.2}h2{font-size:1.5rem;font-weight:700;line-height:1.3}h3{font-size:1.125rem;font-weight:600;line-height:1.4}.container{max-width:var(--max-width);margin:0 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var(--color-border);border-radius:var(--radius);overflow-x:auto}.copy-button{padding:.5rem 1rem;background:var(--color-primary);color:#fff;border:none;border-radius:var(--radius);cursor:pointer;font-size:.8125rem;font-weight:500;white-space:nowrap;transition:var(--transition)}.copy-button:hover{background:var(--color-primary-hover);box-shadow:var(--shadow-md)}input[type=checkbox]{cursor:pointer;accent-color:var(--color-primary)}input[type=checkbox]:disabled{cursor:not-allowed;opacity:.6}