*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}:root{--white: #ffffff;--ink: #111111;--ink-mid: #333333;--ink-soft: #666666;--ink-muted: #999999;--rule: #e8e8e8;--rule-light: #f2f2f2;--accent-bg: #f7f7f7;--blue-tint: #f0f4ff;--blue-soft: #dce6ff;--max: 1120px;--mono: "DM Mono", monospace;--sans: "DM Sans", -apple-system, Helvetica, sans-serif;--nav-h: 60px}html{scroll-behavior:smooth}body{background:var(--white);color:var(--ink);font-family:var(--sans);font-size:16px;line-height:1.6;-webkit-font-smoothing:antialiased}.nav{position:fixed;top:0;left:0;right:0;z-index:200;background:#fffffff0;backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid var(--rule);transform:translateY(-110%);opacity:0;transition:transform .32s cubic-bezier(.4,0,.2,1),opacity .32s ease}.nav.visible{transform:translateY(0);opacity:1}.nav-inner{max-width:var(--max);margin:0 auto;padding:0 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