@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@400;500;600;700;800&display=swap');
:root{--nen:#FFFFFF;--trang:#FFFFFF;--muc:#111827;--muc-2:#374151;--muc-3:#4b5563;--vien:#E5E7EB;--lam:#3B82F6;--lam-dam:#1d4ed8;--luc:#10B981;--cam:#F59E0B}
body{font-family:'Outfit',Arial,sans-serif;--preview-accent:#1d4ed8;--preview-bg:#FFFFFF;--preview-ink:#111827}main *,main *::before,main *::after{box-shadow:none!important;text-shadow:none!important;backdrop-filter:none!important}h1,h2,h3{font-weight:800;line-height:1.2}.mo{background:#3B82F6;color:#111827}.mo h1{font-size:clamp(40px,5vw,72px)}.mo p,.mo .tin{color:#111827}.muc{padding-block:80px;border-bottom:0}.n1,.nut{background:#111827;color:white;border:0;border-radius:6px;min-height:56px;display:inline-flex;align-items:center;justify-content:center;transition:transform .2s,background .2s}.n1:hover,.nut:hover{transform:scale(1.05);background:#1d4ed8}.n2{border:4px solid #111827;border-radius:6px;color:#111827;min-height:56px;display:inline-flex;align-items:center}.the>div{border:0;border-radius:8px;background:#F3F4F6;padding:32px;transition:transform .2s}.the>div:hover{transform:scale(1.02)}#cach{background:#111827;color:white}#cach .the>div{color:#111827}#cach .lab{color:#bfc7d5}.cuoi{background:#F59E0B;color:#111827;border-radius:8px}.cuoi p{color:#111827}.muc:nth-of-type(4){background:#10B981}.doc .so{color:#111827}dl.hoi>div{border-bottom:2px solid #111827}footer{background:#111827;color:#fff;padding:32px}
@media(max-width:640px){.muc{padding-block:48px}.mo h1{font-size:40px}.the>div{padding:24px}}

/* Final visual review */
header .goi{background:#111827;color:white}.mo p.dan{color:#111827}



/* Accessibility review */
body header.top a.goi{color:white}.mo .lab,.muc .lab{color:#111827}#cach .lab{color:#d7e0ee}h1,h2,h3{font-family:'Outfit','Segoe UI',sans-serif}