:root{--background:#f5f5f7;--surface:#fff;--text:#1d1d1f;--muted:#6e6e73;--border:#00000014;--accent:#007aff;--accent-dark:#005fcc;--radius:24px;--radius-small:16px;--shadow:0 20px 50px #00000014;--container:1080px}*{box-sizing:border-box}html{background:var(--background);color:var(--text);scroll-behavior:smooth;font-family:-apple-system,BlinkMacSystemFont,SF Pro Text,Segoe UI,sans-serif}body{min-height:100vh;margin:0}a{color:inherit}main{min-height:70vh}.container{width:min(100% - 40px, var(--container));margin-inline:auto}.site-header{z-index:100;-webkit-backdrop-filter:blur(30px);background:#f5f5f7b8;border-bottom:1px solid #ffffff59;padding:18px 20px;transition:padding .22s,background-color .3s,box-shadow .3s;position:sticky;top:0;box-shadow:0 8px 30px #00000008}.site-header .container{gap:14px;display:grid}.site-header.scrolled{background:#f5f5f7c7;padding-block:10px;box-shadow:0 8px 30px #0000000d}.site-header.scrolled 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