:root{--ink:#10233f;--muted:#63738a;--line:#dfe7ef;--bg:#f6f9fc;--card:#fff;--blue:#2367f2;--cyan:#13b8c8;--purple:#7557ef;--shadow:0 18px 50px rgba(25,48,82,.09)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--ink);font:15px/1.6 Inter,ui-sans-serif,system-ui,-apple-system,Segoe UI,sans-serif}a{color:inherit;text-decoration:none}button,input,select,textarea{font:inherit}.site-header{height:76px;display:flex;align-items:center;justify-content:space-between;padding:0 max(5vw,24px);background:rgba(255,255,255,.9);backdrop-filter:blur(16px);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20}.brand{display:flex;align-items:center;gap:10px;font-size:20px;font-weight:850;letter-spacing:-.5px}.brand span{display:grid;place-items:center;width:38px;height:38px;border-radius:12px;color:#fff;font-size:14px;background:linear-gradient(135deg,var(--blue),var(--cyan));box-shadow:0 8px 20px rgba(35,103,242,.25)}.site-header 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