/* ================================================================
   PDF Flipbook — Styles
   ================================================================ */

/* Wrapper */
.pfb-wrapper {
	--pfb-bg: #f0f0f0;
	--pfb-menu: #2a2a3a;
	--pfb-accent: #64ffda;
	--pfb-btn: #ccd6f6;

	position: relative;
	width: 100%;
	background: var(--pfb-bg);
	border-radius: 8px;
	overflow: hidden;
	font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
	line-height: 1;
}

.pfb-wrapper *,
.pfb-wrapper *::before,
.pfb-wrapper *::after {
	box-sizing: border-box;
}

/* Loading */
.pfb-loading {
	display: flex;
	align-items: center;
	justify-content: center;
	min-height: 400px;
	color: #888;
	font-size: 14px;
}

.pfb-error {
	color: #e74c3c;
	text-align: center;
	padding: 40px 20px;
}

/* Viewport — clips and scrolls when zoomed */
.pfb-viewport {
	position: relative;
	width: 100%;
	overflow: hidden;
	background: var(--pfb-bg);
	padding: 24px 32px;
	cursor: grab;
}

.pfb-viewport:active {
	cursor: grabbing;
}

/* Book container — StPageFlip renders here */
.pfb-book {
	position: relative;
	margin: 0 auto;
	transform-origin: top center;
}

/* Smooth slide when panning within a spread in single-page mode */
.pfb-book.pfb-animate-slide {
	transition: transform 0.35s ease;
}


/* Single-page PDF: canvas directly in book */
.pfb-book-single canvas {
	display: block;
	width: 100%;
	height: 100%;
	object-fit: contain;
}

/* Pages */
.pfb-page {
	background: #fff;
	overflow: hidden;
}

.pfb-page canvas {
	display: block;
	width: 100%;
	height: 100%;
	object-fit: contain;
}

/* ================================================================
   Toolbar
   ================================================================ */
.pfb-toolbar {
	display: flex;
	align-items: center;
	gap: 4px;
	padding: 8px 12px;
	background: var(--pfb-menu);
	flex-wrap: nowrap;
}

/* Left group: pagination, view toggle, thumbnails */
.pfb-toolbar-left {
	display: flex;
	align-items: center;
	gap: 4px;
}

/* Center group: zoom controls */
.pfb-toolbar-center {
	display: flex;
	align-items: center;
	gap: 4px;
	margin: 0 auto;
}

/* Right group: fullscreen, download */
.pfb-toolbar-right {
	display: flex;
	align-items: center;
	gap: 4px;
}

.pfb-btn {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	width: 36px;
	height: 36px;
	border: none;
	border-radius: 6px;
	background: transparent;
	color: var(--pfb-btn);
	cursor: pointer;
	transition: background 0.15s, color 0.15s;
	padding: 0;
	flex-shrink: 0;
}

.pfb-btn:hover {
	background: rgba(255, 255, 255, 0.1);
	color: #fff;
}

.pfb-btn:active {
	background: rgba(255, 255, 255, 0.18);
}

.pfb-btn:focus-visible {
	outline: 2px solid var(--pfb-accent);
	outline-offset: 2px;
}

.pfb-btn svg {
	pointer-events: none;
}

/* Page indicator */
.pfb-page-indicator {
	display: inline-flex;
	align-items: center;
	gap: 4px;
	color: var(--pfb-btn);
	font-size: 13px;
	white-space: nowrap;
}

.pfb-page-input {
	width: 44px;
	height: 28px;
	text-align: center;
	border: 1px solid rgba(255, 255, 255, 0.15);
	border-radius: 4px;
	background: rgba(255, 255, 255, 0.07);
	color: #fff;
	font-size: 13px;
	font-family: inherit;
	-moz-appearance: textfield;
}

.pfb-page-input::-webkit-outer-spin-button,
.pfb-page-input::-webkit-inner-spin-button {
	-webkit-appearance: none;
	margin: 0;
}

.pfb-page-input:focus {
	outline: 2px solid var(--pfb-accent);
	outline-offset: -1px;
}

/* Separator */
.pfb-sep {
	width: 1px;
	height: 20px;
	background: rgba(255, 255, 255, 0.12);
	margin: 0 4px;
	flex-shrink: 0;
}

/* Zoom slider */
.pfb-zoom-slider {
	width: 80px;
	height: 4px;
	-webkit-appearance: none;
	appearance: none;
	background: rgba(255, 255, 255, 0.15);
	border-radius: 2px;
	outline: none;
	cursor: pointer;
}

.pfb-zoom-slider::-webkit-slider-thumb {
	-webkit-appearance: none;
	width: 14px;
	height: 14px;
	border-radius: 50%;
	background: var(--pfb-accent);
	cursor: pointer;
}

.pfb-zoom-slider::-moz-range-thumb {
	width: 14px;
	height: 14px;
	border: none;
	border-radius: 50%;
	background: var(--pfb-accent);
	cursor: pointer;
}

/* Zoom percentage label */
.pfb-zoom-label {
	color: var(--pfb-btn);
	font-size: 12px;
	min-width: 36px;
	text-align: center;
	white-space: nowrap;
	user-select: none;
}

/* ================================================================
   Thumbnail panel
   ================================================================ */
.pfb-thumbnails {
	position: absolute;
	bottom: 0;
	left: 0;
	right: 0;
	z-index: 10;
	background: var(--pfb-menu);
	border-top: 1px solid rgba(255, 255, 255, 0.08);
	border-radius: 8px 8px 0 0;
	padding: 12px;
	max-height: 50%;
	overflow-y: auto;
	box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.3);
}

.pfb-thumbnails.pfb-hidden {
	display: none;
}

.pfb-thumb-grid {
	display: flex;
	flex-wrap: wrap;
	gap: 10px;
	justify-content: center;
}

.pfb-thumb {
	cursor: pointer;
	text-align: center;
	border-radius: 4px;
	overflow: hidden;
	border: 2px solid transparent;
	transition: border-color 0.15s;
}

.pfb-thumb:hover {
	border-color: var(--pfb-accent);
}

.pfb-thumb canvas {
	display: block;
	width: 80px;
	height: auto;
	background: #fff;
}

.pfb-thumb-label {
	display: block;
	font-size: 11px;
	color: var(--pfb-btn);
	padding: 3px 0;
}

/* ================================================================
   Fullscreen overrides
   ================================================================ */
.pfb-wrapper.pfb-fullscreen {
	border-radius: 0;
	display: flex;
	flex-direction: column;
	background: #e8e8e8;
}

.pfb-wrapper.pfb-fullscreen .pfb-viewport {
	flex: 1;
	display: flex;
	align-items: center;
	justify-content: center;
}

/* ================================================================
   Responsive
   ================================================================ */
@media (max-width: 768px) {
	.pfb-viewport {
		padding: 12px 16px;
	}
	.pfb-toolbar {
		gap: 2px;
		padding: 6px 8px;
	}
	.pfb-btn {
		width: 32px;
		height: 32px;
	}
	.pfb-page-indicator {
		display: none;
	}
	.pfb-zoom-slider,
	.pfb-zoom-label {
		display: none;
	}
	.pfb-sep,
	.pfb-btn-thumbs {
		display: none;
	}
}