html,
body {
  background-color: #f8f8f8;
  margin-bottom: 30px
}

h2 {
  color: #555;
  margin: 50px 0 20px 0;
}

button,
button:active,
button:focus {
  outline: none !important;
}

.menu {
  background: #fff; 
  border-top: 6px solid hsl(180, 40%, 60%);
  margin: 0 auto;
  padding: 0;
  width: 200px; 
}
.menu li {
  list-style-type: none;
  overflow: hidden;
  position: relative;
}
.menu li a {
  cursor: pointer;
  display: block; padding: 10px 15px;
  position: relative;
  text-align: left;
  text-decoration: none;
}
.menu li a:hover {
  text-decoration: none;
}
.menu li a .ripple {
  background: hsl(180, 40%, 80%);
}

.default-div {
  background-color: palevioletred;
  color: #fff;
  margin: 0 auto;
  padding: 40px 0;
  width: 200px;
}