* {
  box-sizing: border-box;
}

body {
  background-color: #e0e0e0;
  color:gray;
  font-family:monospace;
  text-align:center;
}

button {
  cursor: pointer;
}

input:focus,
button:focus {
  outline: none;
}

header::after {
  position: absolute;
}

header * {
  z-index: 1;
}

form {
  position: relative;
  padding:16px;
  width:100%;
}

form input {
  border: 0;
  font-size: 16px;
  width: 80%;
  border-radius: 7px;
  background: #e0e0e0;
  box-shadow: 8px 8px 17px #a6a6a6,
    -8px -8px 17px #ffffff;
  padding:10px;;
  margin-left:10px;
  margin-right:10px;
  margin-bottom:12px;
}

form button {
  border-radius: 7px;
  border: none;
  background: #e0e0e0;
  box-shadow: 8px 8px 17px #a6a6a6,
    -8px -8px 17px #ffffff;
  padding:10px;;
  margin:20px;
  color:gray;
}

.btn {
  border-radius: 7px;
  background: #e0e0e0;
  box-shadow: 8px 8px 17px #a6a6a6,
    -8px -8px 17px #ffffff;
  padding:10px;
  color:gray;
}



ul.songs {
  list-style-type: none;
  padding: 0;
}

ul.songs li {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin: 10px 0;
}

.container {
  margin: 30px auto;
  max-width: 100%;
  width: 500px;
}

.container h2 {
  font-weight: 300;
}

.container p {
  text-align: center;
}

.centered {
  display: flex;
  justify-content: center;
}

.centered button {
  transform: scale(1.3);
  margin: 15px;
}