:root{--blue:#0E3A5D;--cyan:#2BB0E6;--green:#4CAF8F;--dark:#2B2E34;}
body{font-family:Arial, sans-serif;margin:0;line-height:1.6;color:var(--dark);}
a{color:var(--blue);}a:focus{outline:3px solid var(--cyan);}
header,footer{background:#f4f6f8;padding:1rem;}
nav a{margin-right:1rem;font-weight:600;}
main{padding:2rem;}
.card{border:1px solid #ddd;border-radius:8px;padding:1rem;margin-bottom:1rem;}