*{margin:0;padding:0;box-sizing:border-box}header{width:100%;background-color:#333;display:flex;justify-content:space-between;align-items:center;padding:15px 5%}header nav ul{list-style:none;display:flex;gap:20px}header nav ul li a{color:#fff;text-decoration:none;font-family:Arial,sans-serif;font-size:16px;transition:color 0.3s ease}header nav ul li a:hover{color:#00bcd4}