/* EPUB Book Reader for OJS – popup on the article page */
.epv-overlay {
	position: fixed; inset: 0; z-index: 100000;
	display: flex; align-items: center; justify-content: center;
	padding: 2vh 2vw;
	background: rgba(15, 12, 8, .72);
	backdrop-filter: blur(3px);
	opacity: 0; visibility: hidden;
	transition: opacity .25s ease, visibility 0s linear .25s;
}
.epv-overlay.is-open { opacity: 1; visibility: visible; transition: opacity .25s ease; }
.epv-window {
	position: relative; width: 100%; height: 100%; max-width: 1500px;
	border-radius: 12px; overflow: hidden; background: #e9e5dd;
	box-shadow: 0 30px 80px rgba(0, 0, 0, .5);
	transform: scale(.96) translateY(12px); transition: transform .3s cubic-bezier(.2, .8, .2, 1);
}
.epv-overlay.is-open .epv-window { transform: none; }
.epv-frame { display: block; width: 100%; height: 100%; border: 0; }
.epv-close {
	position: absolute; top: -9999px; left: 0; /* visible only when focused (reader has its own close button) */
	padding: 6px 12px; font-size: 22px; line-height: 1; border: 0; border-radius: 6px; background: #fff; color: #222; cursor: pointer;
}
.epv-close:focus { top: 8px; left: 8px; z-index: 2; }
@media (max-width: 700px) {
	.epv-overlay { padding: 0; }
	.epv-window { border-radius: 0; }
}
/* Book icon on EPUB galley buttons */
a.epv-link.epv-link::before {
	font-family: inherit !important; content: "" !important;
	content: ""; display: inline-block; width: 1em; height: 1em; margin-right: .35em; vertical-align: -.15em;
	background: currentColor;
	-webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M2 5c3-1.5 6-1.5 10 1 4-2.5 7-2.5 10-1v14c-3-1.5-6-1.5-10 1-4-2.5-7-2.5-10-1z'/%3E%3Cpath d='M12 6v14'/%3E%3C/svg%3E") center / contain no-repeat;
	mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M2 5c3-1.5 6-1.5 10 1 4-2.5 7-2.5 10-1v14c-3-1.5-6-1.5-10 1-4-2.5-7-2.5-10-1z'/%3E%3Cpath d='M12 6v14'/%3E%3C/svg%3E") center / contain no-repeat;
}