:root{--bg:#f7f7f5;--paper:rgba(255,255,255,.88);--white:#fff;--ink:#17191c;--muted:#72767d;--line:#e5e5e2;--soft:#f0f0ed;--shadow:0 12px 35px rgba(20,20,20,.07);--radius:16px;--max:1180px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:linear-gradient(#fafaf8 0%,#f7f7f5 72%,#eef5f6 100%);color:var(--ink);font:15px/1.55 Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}body:after{content:"";position:fixed;left:0;right:0;bottom:0;height:90px;pointer-events:none;opacity:.22;background:linear-gradient(180deg,transparent,#dfecef);z-index:-1}a{color:inherit;text-decoration:none}button,input{font:inherit}.shell{max-width:var(--max);margin:auto;padding:0 22px}.nav{position:sticky;top:14px;z-index:50;margin:14px auto 0;max-width:var(--max);height:58px;border:1px solid rgba(220,220,217,.9);background:rgba(255,255,255,.82);backdrop-filter:blur(18px);border-radius:15px;display:flex;align-items:center;padding:0 14px;box-shadow:0 8px 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