/* VIEWER — просмотр картинок поверх страницы (www/js/modules/lightbox.js; подключает Lightbox::register() на всех страницах).
 * Фон просмотрщика тёмный в обеих темах (так картинки читаются лучше всего); кнопки и подпись — поверх, со своими цветами. */

/* ------------------------------------------------------------ миниатюры на странице */

.nf-lb-z { cursor: zoom-in; }
.nf-lb-z:focus { outline: none; }
.nf-lb-z:focus-visible { outline: 2px solid var(--ring); outline-offset: 3px; }
/* миниатюра, из которой «выросла» открытая картинка: на её месте пусто, пока просмотрщик открыт */
.nf-lb-thumb-off { opacity: 0 !important; transition: none !important; }

/* обложка тайтла: значок «развернуть» при наведении */
.nb-novel-cover .nb-cover.nf-lb-z::after {
	content: ""; position: absolute; right: 10px; bottom: 10px; width: 34px; height: 34px; border-radius: var(--radius-lg);
	background: oklch(0.15 0 0 / 0.62) no-repeat center / 18px 18px;
	background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='white' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M15 3h6v6M9 21H3v-6M21 3l-7 7M3 21l7-7'/%3E%3C/svg%3E");
	opacity: 0; transform: translateY(4px); transition: opacity .18s, transform .18s; pointer-events: none;
	-webkit-backdrop-filter: blur(4px); backdrop-filter: blur(4px);
}
.nb-novel-cover .nb-cover.nf-lb-z:hover::after, .nb-novel-cover .nb-cover.nf-lb-z:focus-visible::after { opacity: 1; transform: none; }

/* ------------------------------------------------------------ прокрутка страницы под просмотрщиком */

html.nf-lb-lock { overflow: hidden !important; }
html.nf-lb-lock body { padding-right: var(--nf-lb-sbw, 0px); }

/* ------------------------------------------------------------ просмотрщик */

.nf-lb {
	--nf-lb-fg: oklch(0.98 0 0);
	--nf-lb-ui-bg: oklch(0.14 0 0 / 0.55);
	position: fixed; inset: 0; z-index: 4000;
	color: var(--nf-lb-fg); font: 400 14px/1.45 var(--font-sans); letter-spacing: -0.005em;
	touch-action: none; overscroll-behavior: contain; -webkit-tap-highlight-color: transparent;
	-webkit-user-select: none; user-select: none; outline: none; contain: layout style;
}
.nf-lb[hidden] { display: none; }
/* почти непрозрачный: текст страницы не просвечивает; при свайпе вниз / щипке фон светлеет (opacity из JS) */
.nf-lb-bg { position: absolute; inset: 0; background: oklch(0.1 0.004 260 / 0.985); opacity: 0; }
.nf-lb-strip { position: absolute; inset: 0; }
.nf-lb-slide { position: absolute; inset: 0; overflow: hidden; }
.nf-lb-slide[hidden] { display: none; }
.nf-lb-img {
	position: absolute; left: 0; top: 0; display: block; max-width: none !important; max-height: none !important;
	margin: 0; padding: 0; border: 0; border-radius: 0; box-shadow: 0 10px 50px oklch(0 0 0 / .35);
	transform-origin: 0 0; backface-visibility: hidden;
	-webkit-user-select: none; user-select: none; -webkit-user-drag: none; -webkit-touch-callout: none;
	background: oklch(1 0 0 / .03);
}
.nf-lb.is-moving .nf-lb-img { will-change: transform; }
.nf-lb-img.is-in { animation: nf-lb-in .24s ease-out; }
@keyframes nf-lb-in { from { opacity: 0; } }

/* курсоры: увеличить — лупа, увеличенная — «рука», фон — обычный */
.nf-lb.is-zoomable .nf-lb-img { cursor: zoom-in; }
.nf-lb.is-zoomed .nf-lb-img { cursor: grab; }
.nf-lb.is-grabbing, .nf-lb.is-grabbing .nf-lb-img { cursor: grabbing; }

/* загрузка и ошибка */
.nf-lb-spin {
	position: absolute; left: 50%; top: 50%; width: 38px; height: 38px; margin: -19px 0 0 -19px; border-radius: 50%;
	border: 3px solid oklch(1 0 0 / .18); border-top-color: var(--nf-lb-fg);
	opacity: 0; visibility: hidden; transition: opacity .2s, visibility 0s .2s; pointer-events: none;
}
.nf-lb-slide.is-loading .nf-lb-spin { opacity: 1; visibility: visible; transition: opacity .2s; animation: nf-lb-spin .8s linear infinite; }
@keyframes nf-lb-spin { to { transform: rotate(360deg); } }
.nf-lb-err {
	display: none; position: absolute; left: 50%; top: 50%; transform: translate(-50%, -50%); margin: 0; width: min(320px, 80vw);
	text-align: center; color: oklch(0.85 0 0); font-size: 14px;
}
.nf-lb-err svg { display: block; margin: 0 auto 10px; opacity: .7; }
.nf-lb-slide.is-error .nf-lb-err { display: block; }

/* ------------------------------------------------------------ панели */

.nf-lb-ui { transition: opacity .22s ease, visibility 0s; }
.nf-lb:not(.is-open) .nf-lb-ui, .nf-lb.is-ui-off .nf-lb-ui, .nf-lb.is-dragging .nf-lb-ui {
	opacity: 0; visibility: hidden; pointer-events: none; transition: opacity .18s ease, visibility 0s .18s;
}

.nf-lb-top {
	position: absolute; left: 0; right: 0; top: 0; z-index: 2; display: flex; align-items: center; gap: 4px;
	padding: 10px max(12px, env(safe-area-inset-right)) 18px max(12px, env(safe-area-inset-left));
	padding-top: max(10px, env(safe-area-inset-top));
	background: linear-gradient(oklch(0 0 0 / .5), oklch(0 0 0 / 0));
}
.nf-lb-count {
	margin-right: auto; padding: 0 10px; font-weight: 550; font-size: 14px; font-variant-numeric: tabular-nums;
	color: oklch(0.92 0 0); text-shadow: 0 1px 2px oklch(0 0 0 / .4);
}
.nf-lb-btn {
	display: inline-flex; align-items: center; justify-content: center; flex: none;
	width: 44px; height: 44px; margin: 0; padding: 0; border: 0; border-radius: var(--radius-lg);
	background: transparent; color: var(--nf-lb-fg); opacity: .86; cursor: pointer; text-decoration: none !important;
	transition: background-color .15s, opacity .15s, transform .15s;
}
.nf-lb-btn[hidden] { display: none; }
.nf-lb-btn:hover { opacity: 1; background: oklch(1 0 0 / .12); color: var(--nf-lb-fg); }
.nf-lb-btn:active { transform: scale(.94); }
.nf-lb-btn:focus { outline: none; }
.nf-lb-btn:focus-visible { opacity: 1; outline: 2px solid var(--nf-lb-fg); outline-offset: -3px; background: oklch(1 0 0 / .12); }
.nf-lb-btn svg { pointer-events: none; filter: drop-shadow(0 1px 2px oklch(0 0 0 / .35)); }

.nf-lb-arrow {
	position: absolute; top: 50%; z-index: 2; width: 52px; height: 64px; margin-top: -32px;
	background: var(--nf-lb-ui-bg); -webkit-backdrop-filter: blur(6px); backdrop-filter: blur(6px);
}
.nf-lb-arrow:hover { background: oklch(0.22 0 0 / .72); }
.nf-lb-prev { left: max(12px, env(safe-area-inset-left)); }
.nf-lb-next { right: max(12px, env(safe-area-inset-right)); }
.nf-lb-arrow:disabled { opacity: 0; visibility: hidden; pointer-events: none; }
.nf-lb.is-single .nf-lb-arrow { display: none; }
/* сенсорный экран: листают свайпом, стрелки не нужны */
@media (hover: none) and (pointer: coarse) { .nf-lb-arrow { display: none; } }

.nf-lb-cap {
	position: absolute; left: 0; right: 0; bottom: 0; z-index: 2; text-align: center;
	padding: 34px max(20px, env(safe-area-inset-right)) max(16px, env(safe-area-inset-bottom)) max(20px, env(safe-area-inset-left));
	background: linear-gradient(oklch(0 0 0 / 0), oklch(0 0 0 / .62));
	pointer-events: none;
}
.nf-lb-cap[hidden] { display: none; }
.nf-lb-cap p {
	display: inline-block; max-width: 72ch; max-height: 6em; margin: 0; overflow: auto; overscroll-behavior: contain; pointer-events: auto;
	color: oklch(0.95 0 0); font-size: 14.5px; line-height: 1.45; text-wrap: pretty; text-shadow: 0 1px 3px oklch(0 0 0 / .5);
	-webkit-user-select: text; user-select: text;
}
.nf-lb.is-protected .nf-lb-cap p { -webkit-user-select: none; user-select: none; }

.nf-lb-sr { position: absolute !important; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

@media (max-width: 699px) {
	.nf-lb-top { padding-left: max(6px, env(safe-area-inset-left)); padding-right: max(6px, env(safe-area-inset-right)); }
	.nf-lb-count { padding: 0 8px; font-size: 13.5px; }
	.nf-lb-cap { padding-top: 28px; }
	.nf-lb-cap p { font-size: 13.5px; }
	.nf-lb-img { box-shadow: none; }
}

@media (prefers-reduced-motion: reduce) {
	.nf-lb-ui, .nf-lb-btn { transition: none; }
	.nf-lb-img.is-in { animation-duration: .01s; }
	.nb-novel-cover .nb-cover.nf-lb-z::after { transition: none; }
	.nf-lb-slide.is-loading .nf-lb-spin { animation-duration: 1.6s; }
}

@media print { .nf-lb { display: none !important; } }