section {
	background-color: #f1f1f1;
	padding: 20px;
	margin: 20px 0;
	border: 1px solid black;
}

section h2 {
	margin-top: 0;
}

section .close {
    float: right;
}

section a {
    text-decoration: none;
    color: black;
}

#popup {
    position: fixed;
    top: 10%;
    left: 50%;
    transform: translate(-50%, -50%);
    padding: 20px;
    background-color: red;
    border: 1px solid black;
    z-index: 9999;
}

.hidden {
    display: none;
}