:root{--ink:#1d1d1f;--muted:#6e6e73;--bg:#ffffff;--card:#f5f5f7;--blue:#0071e3;--wb-blue:#039;--wb-yellow:#ffd633;--line:#d2d2d7}*{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth;overscroll-behavior:none}body,html{background:var(--bg)}body{font-family:system-ui,Segoe UI,Roboto,Helvetica Neue,Helvetica,Arial,sans-serif;color:var(--ink);-webkit-font-smoothing:antialiased;padding-bottom:40px;display:flex;flex-direction:column;min-height:100vh}footer{margin-top:auto}a{text-decoration:none;color:inherit}.ribbon{background:var(--card);text-align:center;font-size:13px;color:var(--ink);padding:10px 16px}.ribbon a{color:var(--blue)}.nav{position:-webkit-sticky;position:sticky;top:0;z-index:20;background:rgba(255,255,255,.85);backdrop-filter:saturate(180%) blur(20px);-webkit-backdrop-filter:saturate(180%) blur(20px);border-bottom:1px solid var(--line)}.nav-inner{max-width:1120px;margin:0 auto;height:58px;gap:34px;padding:0 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