---

<html>
<head><style>
#menu (
background-color: #004400; width: 150px; / border-radius: брx; transition: all 0.5s ease;
#menu:active/ background-color: #f4400;
}
button!
margin: 15px;
background-color: #994400; border-radius: 4px;
transition: all 0.3s ease-in;
color: aqua; font-size: 30px;
button:hover ( background-color: #554400; border-radius: 16px;
</style></head>
<body>
< div id="menu">

<a href-"https://www.google.com/"><button>GOOGLE</button>

 <a href-"https://www.yandex.ru/"><button>YANDEX</button>

<a href-"https://www.yahoo.com/'><button>YAH00</button>

<div>
</body>
</html>