:root{--primary:#0F172A;--secondary:#FFFFFF;--accent:#2563EB;--neutral:#F5F7FA;--text:#1E293B;--muted:#64748B;--line:rgba(15,23,42,.12);--shadow:0 24px 70px rgba(15,23,42,.12);--radius:8px;--header-height:76px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:"Inter",Arial,sans-serif;background:var(--secondary);color:var(--text);line-height:1.7}body.dark{--secondary:#0F172A;--neutral:#111827;--text:#E5E7EB;--muted:#CBD5E1;--line:rgba(255,255,255,.14);--shadow:0 24px 70px rgba(0,0,0,.28)}body.menu-open{overflow:hidden}a{color:inherit;text-decoration:none}img{display:block;max-width:100%}button,input,textarea{font:inherit}button{cursor:pointer}.container{width:min(1120px,calc(100% - 40px));margin:0 auto}.section{padding:96px 0;scroll-margin-top:var(--header-height)}.section-heading{max-width:720px;margin-bottom:34px}.section-heading h2,.contact-copy h2{margin:6px 0 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