:root{--navy:#172554;--blue:#4f46e5;--purple:#7c3aed;--light:#f5f7ff;--border:#dbe3f2;--text:#17213b;--muted:#667085;--green:#138a45;--red:#b42318;--amber:#b54708}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--light);color:var(--text);font-family:"Noto Sans Tamil","Latha","Arial Unicode MS",system-ui,sans-serif;line-height:1.7}.container{max-width:1220px;margin:auto;padding:0 22px}.site-header{background:#fff;border-bottom:1px solid var(--border);position:sticky;top:0;z-index:40}.nav-wrap{min-height:78px;display:flex;align-items:center;justify-content:space-between}.brand{display:flex;align-items:center;gap:11px;font-weight:900;color:var(--navy);text-decoration:none;line-height:1.15}.brand small{font-size:14px}.brand-mark{display:grid;place-items:center;width:42px;height:42px;border-radius:13px;background:linear-gradient(135deg,var(--blue),var(--purple));color:#fff;font-size:22px}.main-nav{display:flex;align-items:center;gap:15px}.main-nav 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