:root{--max: 1160px;--readable: 760px;--ink: #22303a;--muted: #6b7a82;--accent: #18b5a5;--accent-dark: #12a091;--bg: #f4f7f9;--card: #ffffff;--line: #e4ebee;--dark: #223039;--shadow: 0 8px 26px rgba(30, 60, 70, .08);--font-head: "Quicksand", system-ui, sans-serif;--font-body: "Open Sans", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--ink);background:var(--bg);font-family:var(--font-body);line-height:1.7;-webkit-font-smoothing:antialiased}img{max-width:100%;height:auto;display:block}a{color:var(--accent-dark);text-decoration:none}a:hover{text-decoration:underline}h1,h2,h3,.brand{font-family:var(--font-head);line-height:1.2}.header-wrap{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20}.site-header{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:1rem;max-width:var(--max);margin:0 auto;padding:.8rem 1.25rem}.brand 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