/* Five Number Lightbox — no dependencies, no framework. */

.fnlb-overlay {
	position: fixed;
	inset: 0;
	z-index: 999999;
	display: flex;
	align-items: center;
	justify-content: center;
	padding: 2.5rem 1rem 4.5rem;
	background: rgba(12, 14, 18, 0.92);
	opacity: 0;
	visibility: hidden;
	transition: opacity 0.18s ease, visibility 0.18s ease;
	-webkit-backdrop-filter: blur(3px);
	backdrop-filter: blur(3px);
}

.fnlb-overlay.is-open {
	opacity: 1;
	visibility: visible;
}

.fnlb-stage {
	position: relative;
	max-width: 100%;
	max-height: 100%;
	display: flex;
	flex-direction: column;
	align-items: center;
	justify-content: center;
}

.fnlb-img {
	display: block;
	max-width: min(92vw, 1400px);
	max-height: 82vh;
	width: auto;
	height: auto;
	border-radius: 3px;
	box-shadow: 0 18px 50px rgba(0, 0, 0, 0.55);
	background: #1b1e24;
	transform: scale(0.97);
	opacity: 0;
	transition: opacity 0.2s ease, transform 0.2s ease;
}

.fnlb-img.is-loaded {
	opacity: 1;
	transform: scale(1);
}

/* Caption sits under the image, centred, never wider than the image itself. */
.fnlb-caption {
	margin: 0.85rem auto 0;
	max-width: min(92vw, 1400px);
	color: #e7e9ee;
	font-size: 0.9rem;
	line-height: 1.5;
	text-align: center;
	text-shadow: 0 1px 2px rgba(0, 0, 0, 0.6);
}

.fnlb-caption:empty {
	display: none;
}

/* --- controls ----------------------------------------------------------- */

.fnlb-btn {
	position: absolute;
	display: flex;
	align-items: center;
	justify-content: center;
	width: 44px;
	height: 44px;
	padding: 0;
	border: 0;
	border-radius: 50%;
	background: rgba(255, 255, 255, 0.11);
	color: #fff;
	font-size: 20px;
	line-height: 1;
	cursor: pointer;
	transition: background 0.15s ease, transform 0.15s ease;
}

.fnlb-btn:hover,
.fnlb-btn:focus-visible {
	background: rgba(255, 255, 255, 0.24);
}

.fnlb-btn:focus-visible {
	outline: 2px solid #fff;
	outline-offset: 3px;
}

.fnlb-btn[hidden] {
	display: none;
}

.fnlb-close {
	top: 1rem;
	right: 1rem;
	font-size: 24px;
}

.fnlb-prev { left: 1rem; top: 50%; margin-top: -22px; }
.fnlb-next { right: 1rem; top: 50%; margin-top: -22px; }

.fnlb-counter {
	position: absolute;
	bottom: 1.4rem;
	left: 50%;
	transform: translateX(-50%);
	color: rgba(255, 255, 255, 0.72);
	font-size: 0.8rem;
	letter-spacing: 0.04em;
	font-variant-numeric: tabular-nums;
}

.fnlb-counter[hidden] {
	display: none;
}

/* Spinner shown while the full-size image downloads. */
.fnlb-overlay.is-loading .fnlb-stage::after {
	content: "";
	position: absolute;
	top: 50%;
	left: 50%;
	width: 34px;
	height: 34px;
	margin: -17px 0 0 -17px;
	border: 2px solid rgba(255, 255, 255, 0.25);
	border-top-color: #fff;
	border-radius: 50%;
	animation: fnlb-spin 0.7s linear infinite;
}

@keyframes fnlb-spin {
	to { transform: rotate(360deg); }
}

/* An unlinked image is clickable, so say so. */
img[data-fnlb-full] {
	cursor: zoom-in;
}

/*
 * Stop the page behind the overlay from scrolling.
 *
 * position:fixed rather than overflow:hidden alone, because iOS Safari ignores
 * overflow:hidden on body. The scroll position is saved and restored in JS,
 * since going fixed drops the page to the top.
 */
html.fnlb-locked {
	overflow: hidden;
}

body.fnlb-locked {
	position: fixed;
	width: 100%;
	overflow: hidden;
}

@media (max-width: 600px) {
	.fnlb-overlay { padding: 1rem 0.5rem 3.5rem; }
	.fnlb-prev { left: 0.35rem; }
	.fnlb-next { right: 0.35rem; }
	.fnlb-close { top: 0.5rem; right: 0.5rem; }
	.fnlb-img { max-height: 74vh; }
}

@media (prefers-reduced-motion: reduce) {
	.fnlb-overlay,
	.fnlb-img,
	.fnlb-btn {
		transition: none;
	}
	.fnlb-overlay.is-loading .fnlb-stage::after {
		animation: none;
	}
}