/**
 * PDF Editor — front-end styles (premium redesign).
 *
 * A modern, high-definition UI: soft depth, refined typography,
 * fluid motion and an immersive editing canvas.
 *
 * @package PDF_Editor
 */

/* -------------------------------------------------------------------------
 * Design tokens
 * ---------------------------------------------------------------------- */
.pde-root {
	--pde-primary: #4f46e5;
	--pde-primary-strong: #4338ca;
	--pde-primary-soft: #eef2ff;
	--pde-secondary: #0f172a;
	--pde-accent: #06b6d4;

	--pde-text: #0f172a;
	--pde-muted: #64748b;
	--pde-faint: #94a3b8;

	--pde-border: #e2e8f0;
	--pde-border-strong: #cbd5e1;

	--pde-bg: #ffffff;
	--pde-bg-soft: #f8fafc;
	--pde-bg-sunken: #f1f5f9;

	--pde-danger: #e11d48;
	--pde-danger-strong: #be123c;
	--pde-success: #059669;

	--pde-radius: 14px;
	--pde-radius-sm: 9px;
	--pde-radius-pill: 999px;

	--pde-shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.06), 0 1px 3px rgba(15, 23, 42, 0.08);
	--pde-shadow-md: 0 4px 12px rgba(15, 23, 42, 0.08), 0 2px 4px rgba(15, 23, 42, 0.06);
	--pde-shadow-lg: 0 20px 45px -15px rgba(15, 23, 42, 0.25);
	--pde-ring: 0 0 0 4px rgba(79, 70, 229, 0.18);

	--pde-canvas-bg: radial-gradient(120% 120% at 50% 0%, #3b4252 0%, #272c3a 60%, #1c2030 100%);

	font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", sans-serif;
	box-sizing: border-box;
	max-width: 1440px;
	margin: 0 auto;
	color: var(--pde-text);
	line-height: 1.6;
	-webkit-font-smoothing: antialiased;
	text-rendering: optimizeLegibility;
}

.pde-root *,
.pde-root *::before,
.pde-root *::after {
	box-sizing: border-box;
}

.pde-root .dashicons {
	font-size: 20px;
	width: 20px;
	height: 20px;
	line-height: 20px;
	vertical-align: middle;
}

/* -------------------------------------------------------------------------
 * Utility
 * ---------------------------------------------------------------------- */
.pde-visually-hidden {
	position: absolute !important;
	width: 1px;
	height: 1px;
	margin: -1px;
	padding: 0;
	border: 0;
	clip: rect(0 0 0 0);
	overflow: hidden;
	white-space: nowrap;
}

/*
 * The HTML `hidden` attribute must always beat the component `display`
 * rules below (workspace, drop overlay, tool options).
 */
.pde-root [hidden] {
	display: none !important;
}

/* Focus visibility — consistent, accessible ring on every interactive el. */
.pde-root button:focus-visible,
.pde-root a:focus-visible,
.pde-root input:focus-visible,
.pde-root [tabindex]:focus-visible {
	outline: none;
	box-shadow: var(--pde-ring);
	border-radius: var(--pde-radius-sm);
}

/* -------------------------------------------------------------------------
 * Info / privacy chips
 * ---------------------------------------------------------------------- */
.pde-disclaimer,
.pde-privacy-badge {
	display: flex;
	align-items: center;
	gap: 10px;
	border-radius: var(--pde-radius-pill);
	padding: 10px 16px;
	margin-bottom: 12px;
	font-size: 13px;
	font-weight: 500;
}

.pde-disclaimer {
	background: linear-gradient(90deg, #eef2ff, #f5f3ff);
	border: 1px solid #ddd6fe;
	color: #4338ca;
}

.pde-disclaimer .dashicons {
	color: var(--pde-primary);
}

.pde-disclaimer p {
	margin: 0;
}

.pde-privacy-badge {
	background: linear-gradient(90deg, #ecfdf5, #f0fdfa);
	border: 1px solid #a7f3d0;
	color: #047857;
	margin-bottom: 20px;
}

.pde-privacy-badge .dashicons {
	color: var(--pde-success);
}

/* -------------------------------------------------------------------------
 * App shell
 * ---------------------------------------------------------------------- */
.pde-app {
	position: relative;
	border: 1px solid var(--pde-border);
	border-radius: var(--pde-radius);
	background: var(--pde-bg);
	box-shadow: var(--pde-shadow-lg);
	overflow: hidden;
}

.pde-sr-status {
	position: absolute;
	left: -9999px;
	top: auto;
	width: 1px;
	height: 1px;
	overflow: hidden;
}

/* -------------------------------------------------------------------------
 * Upload / empty state
 * ---------------------------------------------------------------------- */
.pde-upload-panel {
	padding: 56px 24px 64px;
	text-align: center;
	background:
		radial-gradient(60% 80% at 50% -10%, rgba(79, 70, 229, 0.08), transparent 70%),
		var(--pde-bg);
}

.pde-step-title {
	display: flex;
	align-items: center;
	justify-content: center;
	gap: 12px;
	font-size: 28px;
	font-weight: 700;
	letter-spacing: -0.02em;
	margin: 0 0 8px;
	color: var(--pde-secondary);
}

.pde-step-title .dashicons {
	font-size: 32px;
	width: 32px;
	height: 32px;
	color: var(--pde-primary);
}

.pde-dropzone {
	position: relative;
	border: 2px dashed var(--pde-border-strong);
	border-radius: var(--pde-radius);
	padding: 56px 24px;
	margin: 28px auto 0;
	max-width: 640px;
	cursor: pointer;
	transition: border-color 0.2s ease, background 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
	background: var(--pde-bg-soft);
}

.pde-dropzone:hover,
.pde-dropzone:focus {
	border-color: var(--pde-primary);
	background: var(--pde-primary-soft);
	transform: translateY(-2px);
	box-shadow: var(--pde-shadow-md);
}

.pde-dropzone .dashicons-upload {
	font-size: 56px;
	width: 56px;
	height: 56px;
	color: var(--pde-primary);
	filter: drop-shadow(0 6px 12px rgba(79, 70, 229, 0.25));
}

.pde-drop-hint {
	font-size: 19px;
	font-weight: 600;
	margin: 16px 0 4px;
	color: var(--pde-secondary);
}

.pde-drop-or {
	color: var(--pde-faint);
	margin: 4px 0 16px;
	font-size: 13px;
	text-transform: uppercase;
	letter-spacing: 0.12em;
}

.pde-drop-formats {
	font-size: 13px;
	color: var(--pde-muted);
	margin-top: 16px;
}

/* -------------------------------------------------------------------------
 * Buttons
 * ---------------------------------------------------------------------- */
.pde-btn {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	gap: 8px;
	padding: 10px 18px;
	border: 1px solid var(--pde-border-strong);
	border-radius: var(--pde-radius-sm);
	background: var(--pde-bg);
	color: var(--pde-text);
	font-size: 14px;
	font-weight: 600;
	line-height: 1.4;
	cursor: pointer;
	transition: transform 0.12s ease, background 0.15s ease, border-color 0.15s ease, color 0.15s ease, box-shadow 0.15s ease;
	text-decoration: none;
	box-shadow: var(--pde-shadow-sm);
}

.pde-btn:hover {
	background: var(--pde-bg-soft);
	border-color: var(--pde-faint);
	transform: translateY(-1px);
}

.pde-btn:active {
	transform: translateY(0);
}

.pde-btn-primary {
	background: linear-gradient(135deg, var(--pde-primary), var(--pde-primary-strong));
	border-color: transparent;
	color: #fff;
	box-shadow: 0 6px 16px -4px rgba(79, 70, 229, 0.5);
}

.pde-btn-primary:hover {
	background: linear-gradient(135deg, #5b52f0, var(--pde-primary));
	border-color: transparent;
	color: #fff;
	box-shadow: 0 10px 22px -6px rgba(79, 70, 229, 0.6);
}

.pde-btn-danger {
	background: linear-gradient(135deg, var(--pde-danger), var(--pde-danger-strong));
	border-color: transparent;
	color: #fff;
	box-shadow: 0 6px 16px -4px rgba(225, 29, 72, 0.45);
}

.pde-btn-danger:hover {
	background: linear-gradient(135deg, #f43f5e, var(--pde-danger));
	border-color: transparent;
	color: #fff;
}

/* -------------------------------------------------------------------------
 * Workspace layout
 * ---------------------------------------------------------------------- */
.pde-workspace {
	display: flex;
	min-height: 640px;
	background: var(--pde-bg);
}

.pde-sidebar {
	width: 208px;
	flex-shrink: 0;
	border-right: 1px solid var(--pde-border);
	background: var(--pde-bg-soft);
	display: flex;
	flex-direction: column;
}

.pde-sidebar-title {
	font-size: 11px;
	font-weight: 700;
	text-transform: uppercase;
	letter-spacing: 0.08em;
	color: var(--pde-muted);
	padding: 16px 16px 10px;
	margin: 0;
	display: flex;
	align-items: center;
	gap: 8px;
}

.pde-sidebar-title .dashicons {
	font-size: 16px;
	width: 16px;
	height: 16px;
	color: var(--pde-primary);
}

.pde-thumbnails {
	flex: 1;
	overflow-y: auto;
	padding: 6px 12px 16px;
	display: flex;
	flex-direction: column;
	gap: 12px;
	scrollbar-width: thin;
}

.pde-thumb {
	position: relative;
	border: 2px solid transparent;
	border-radius: var(--pde-radius-sm);
	background: var(--pde-bg);
	cursor: pointer;
	transition: border-color 0.15s ease, transform 0.15s ease, box-shadow 0.15s ease;
	padding: 6px;
	text-align: center;
	box-shadow: var(--pde-shadow-sm);
}

.pde-thumb:hover {
	transform: translateY(-2px);
	box-shadow: var(--pde-shadow-md);
}

.pde-thumb.is-active {
	border-color: var(--pde-primary);
	box-shadow: var(--pde-ring);
}

.pde-thumb.is-dragover {
	border-color: var(--pde-accent);
	box-shadow: 0 0 0 4px rgba(6, 182, 212, 0.2);
}

.pde-thumb.dragging {
	opacity: 0.45;
}

.pde-thumb canvas {
	max-width: 100%;
	height: auto;
	display: block;
	margin: 0 auto;
	background: #fff;
	border: 1px solid var(--pde-border);
	border-radius: 4px;
}

.pde-thumb-label {
	display: block;
	font-size: 11px;
	font-weight: 600;
	color: var(--pde-muted);
	margin-top: 6px;
}

.pde-thumb.is-active .pde-thumb-label {
	color: var(--pde-primary);
}

.pde-thumb-actions {
	position: absolute;
	top: 6px;
	right: 6px;
	display: flex;
	gap: 3px;
	opacity: 0;
	transform: translateY(-4px);
	transition: opacity 0.15s ease, transform 0.15s ease;
}

.pde-thumb:hover .pde-thumb-actions {
	opacity: 1;
	transform: translateY(0);
}

.pde-thumb-actions button {
	width: 26px;
	height: 26px;
	padding: 0;
	border: 1px solid var(--pde-border);
	border-radius: 7px;
	background: rgba(255, 255, 255, 0.98);
	backdrop-filter: blur(4px);
	cursor: pointer;
	display: flex;
	align-items: center;
	justify-content: center;
	color: var(--pde-text);
	box-shadow: var(--pde-shadow-sm);
	transition: background 0.15s ease, color 0.15s ease, transform 0.12s ease;
}

.pde-thumb-actions button .dashicons {
	font-size: 15px;
	width: 15px;
	height: 15px;
}

.pde-thumb-actions button:hover {
	background: var(--pde-primary-soft);
	color: var(--pde-primary);
	transform: translateY(-1px);
}

.pde-thumb-actions button.pde-del-page:hover {
	background: #ffe4e6;
	color: var(--pde-danger);
}

/* -------------------------------------------------------------------------
 * Main column / toolbar
 * ---------------------------------------------------------------------- */
.pde-main {
	flex: 1;
	display: flex;
	flex-direction: column;
	min-width: 0;
}

.pde-toolbar {
	display: flex;
	align-items: center;
	flex-wrap: wrap;
	gap: 8px;
	padding: 10px 14px;
	border-bottom: 1px solid var(--pde-border);
	background: rgba(255, 255, 255, 0.85);
	backdrop-filter: saturate(150%) blur(8px);
	position: relative;
	z-index: 5;
}

.pde-toolbar-group {
	display: flex;
	align-items: center;
	gap: 4px;
	padding: 4px;
	background: var(--pde-bg-sunken);
	border-radius: var(--pde-radius-sm);
}

.pde-toolbar-group.pde-toolbar-right {
	background: transparent;
	padding: 0;
	gap: 8px;
}

.pde-toolbar-right {
	margin-left: auto;
}

.pde-tool-btn {
	width: 38px;
	height: 38px;
	padding: 0;
	border: 1px solid transparent;
	border-radius: 9px;
	background: transparent;
	cursor: pointer;
	display: flex;
	align-items: center;
	justify-content: center;
	color: var(--pde-muted);
	transition: background 0.15s ease, color 0.15s ease, transform 0.12s ease, box-shadow 0.15s ease;
}

.pde-tool-btn:hover {
	background: var(--pde-bg);
	color: var(--pde-text);
	box-shadow: var(--pde-shadow-sm);
}

.pde-tool-btn:active {
	transform: scale(0.94);
}

.pde-tool-btn.is-active {
	background: linear-gradient(135deg, var(--pde-primary), var(--pde-primary-strong));
	border-color: transparent;
	color: #fff;
	box-shadow: 0 4px 12px -3px rgba(79, 70, 229, 0.55);
}

.pde-tool-btn:disabled,
.pde-tool-btn.is-disabled {
	opacity: 0.4;
	cursor: not-allowed;
	box-shadow: none;
}

.pde-zoom-value {
	font-size: 13px;
	font-weight: 600;
	font-variant-numeric: tabular-nums;
	color: var(--pde-text);
	min-width: 48px;
	text-align: center;
}

/* -------------------------------------------------------------------------
 * Canvas area
 * ---------------------------------------------------------------------- */
.pde-canvas-area {
	flex: 1;
	display: flex;
	flex-direction: column;
	position: relative;
	background: var(--pde-canvas-bg);
	min-height: 0;
}

.pde-canvas-wrap {
	flex: 1;
	position: relative;
	overflow: auto;
	display: flex;
	align-items: flex-start;
	justify-content: center;
	padding: 32px;
	scrollbar-width: thin;
	scrollbar-color: rgba(255, 255, 255, 0.3) transparent;
}

.pde-canvas-wrap::-webkit-scrollbar {
	width: 12px;
	height: 12px;
}

.pde-canvas-wrap::-webkit-scrollbar-thumb {
	background: rgba(255, 255, 255, 0.25);
	border-radius: 999px;
	border: 3px solid transparent;
	background-clip: content-box;
}

.pde-canvas-wrap::-webkit-scrollbar-thumb:hover {
	background: rgba(255, 255, 255, 0.4);
	background-clip: content-box;
}

.pde-page-canvas,
.pde-annotation-canvas {
	position: absolute;
	top: 50%;
	left: 50%;
	transform: translate(-50%, -50%);
	border-radius: 3px;
	box-shadow:
		0 0 0 1px rgba(255, 255, 255, 0.08),
		0 24px 60px -12px rgba(0, 0, 0, 0.6),
		0 8px 20px -8px rgba(0, 0, 0, 0.5);
	background: #fff;
	touch-action: none;
}

.pde-page-canvas {
	cursor: default;
}

.pde-annotation-canvas {
	cursor: crosshair;
}

.pde-drop-overlay {
	position: absolute;
	inset: 16px;
	z-index: 20;
	display: flex;
	flex-direction: column;
	align-items: center;
	justify-content: center;
	background: rgba(79, 70, 229, 0.14);
	backdrop-filter: blur(2px);
	border: 3px dashed rgba(255, 255, 255, 0.85);
	border-radius: var(--pde-radius);
	color: #fff;
	pointer-events: none;
}

.pde-drop-overlay .dashicons {
	font-size: 48px;
	width: 48px;
	height: 48px;
	filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.3));
}

.pde-drop-overlay p {
	font-size: 17px;
	font-weight: 700;
	color: #fff;
	margin: 10px 0 0;
	text-shadow: 0 1px 4px rgba(0, 0, 0, 0.35);
}

/* Page nav */
.pde-page-nav {
	display: flex;
	align-items: center;
	justify-content: center;
	gap: 8px;
	padding: 10px 12px;
	border-top: 1px solid rgba(255, 255, 255, 0.08);
	background: rgba(15, 23, 42, 0.35);
	backdrop-filter: blur(8px);
}

.pde-nav-btn {
	width: 34px;
	height: 34px;
	padding: 0;
	border: 1px solid rgba(255, 255, 255, 0.18);
	border-radius: 9px;
	background: rgba(255, 255, 255, 0.1);
	color: #fff;
	cursor: pointer;
	display: flex;
	align-items: center;
	justify-content: center;
	transition: background 0.15s ease, transform 0.12s ease;
}

.pde-nav-btn:hover {
	background: rgba(255, 255, 255, 0.22);
	transform: translateY(-1px);
}

.pde-page-indicator {
	font-size: 13px;
	font-weight: 600;
	font-variant-numeric: tabular-nums;
	color: rgba(255, 255, 255, 0.92);
	min-width: 120px;
	text-align: center;
}

/* -------------------------------------------------------------------------
 * Tool options
 * ---------------------------------------------------------------------- */
.pde-tool-options {
	border-top: 1px solid var(--pde-border);
	padding: 12px 16px;
	background: var(--pde-bg-soft);
	display: flex;
	flex-wrap: wrap;
	align-items: center;
	gap: 16px;
	font-size: 13px;
}

.pde-option-group {
	display: flex;
	align-items: center;
	gap: 10px;
}

.pde-label {
	font-size: 13px;
	font-weight: 600;
	color: var(--pde-muted);
}

.pde-input {
	padding: 8px 12px;
	border: 1px solid var(--pde-border-strong);
	border-radius: var(--pde-radius-sm);
	font-size: 14px;
	background: var(--pde-bg);
	color: var(--pde-text);
	transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.pde-input:focus {
	border-color: var(--pde-primary);
	box-shadow: var(--pde-ring);
	outline: none;
}

.pde-input-small {
	max-width: 92px;
}

/* Color swatches */
.pde-root input[type="color"] {
	width: 34px;
	height: 34px;
	padding: 0;
	border: 1px solid var(--pde-border-strong);
	border-radius: 9px;
	background: var(--pde-bg);
	cursor: pointer;
}

.pde-root input[type="color"]::-webkit-color-swatch-wrapper {
	padding: 3px;
}

.pde-root input[type="color"]::-webkit-color-swatch {
	border: none;
	border-radius: 6px;
}

/* Range slider */
.pde-root input[type="range"] {
	-webkit-appearance: none;
	appearance: none;
	width: 120px;
	height: 6px;
	border-radius: 999px;
	background: var(--pde-bg-sunken);
	outline: none;
	cursor: pointer;
}

.pde-root input[type="range"]::-webkit-slider-thumb {
	-webkit-appearance: none;
	appearance: none;
	width: 18px;
	height: 18px;
	border-radius: 50%;
	background: var(--pde-primary);
	border: 2px solid #fff;
	box-shadow: var(--pde-shadow-sm);
	transition: transform 0.12s ease;
}

.pde-root input[type="range"]::-webkit-slider-thumb:hover {
	transform: scale(1.15);
}

.pde-root input[type="range"]::-moz-range-thumb {
	width: 18px;
	height: 18px;
	border-radius: 50%;
	background: var(--pde-primary);
	border: 2px solid #fff;
	box-shadow: var(--pde-shadow-sm);
}

.pde-checkbox-label {
	display: inline-flex;
	align-items: center;
	gap: 6px;
	font-size: 13px;
	font-weight: 500;
	cursor: pointer;
	color: var(--pde-text);
}

.pde-root input[type="checkbox"] {
	width: 16px;
	height: 16px;
	accent-color: var(--pde-primary);
	cursor: pointer;
}

/* -------------------------------------------------------------------------
 * SEO section
 * ---------------------------------------------------------------------- */
.pde-seo-section {
	margin-top: 44px;
	display: grid;
	grid-template-columns: repeat(2, 1fr);
	gap: 24px;
}

.pde-seo-block {
	background: var(--pde-bg);
	border: 1px solid var(--pde-border);
	border-radius: var(--pde-radius);
	padding: 28px;
	box-shadow: var(--pde-shadow-sm);
	transition: box-shadow 0.2s ease, transform 0.2s ease;
}

.pde-seo-block:hover {
	box-shadow: var(--pde-shadow-md);
	transform: translateY(-2px);
}

.pde-seo-block h2 {
	font-size: 20px;
	font-weight: 700;
	letter-spacing: -0.01em;
	color: var(--pde-secondary);
	margin: 0 0 12px;
}

.pde-seo-block p {
	font-size: 15px;
	margin: 0;
	color: #475569;
}

.pde-faq-block {
	grid-column: 1 / -1;
}

.pde-faq-block h2 {
	margin-bottom: 18px;
}

.pde-faq-item {
	border-top: 1px solid var(--pde-border);
	padding: 16px 0;
}

.pde-faq-item:first-of-type {
	border-top: 0;
	padding-top: 0;
}

.pde-faq-item h3 {
	font-size: 15px;
	font-weight: 700;
	margin: 0 0 6px;
	color: var(--pde-text);
}

.pde-faq-item p {
	font-size: 14px;
	margin: 0;
	color: #475569;
}

/* -------------------------------------------------------------------------
 * Responsive
 * ---------------------------------------------------------------------- */
@media (max-width: 782px) {
	.pde-workspace {
		flex-direction: column;
		min-height: auto;
	}

	.pde-sidebar {
		width: 100%;
		border-right: 0;
		border-bottom: 1px solid var(--pde-border);
		max-height: 200px;
	}

	.pde-thumbnails {
		flex-direction: row;
		overflow-x: auto;
		overflow-y: hidden;
	}

	.pde-thumb {
		flex: 0 0 120px;
	}

	.pde-toolbar-right {
		margin-left: 0;
		width: 100%;
		justify-content: flex-start;
	}

	.pde-seo-section {
		grid-template-columns: 1fr;
	}

	.pde-faq-block {
		grid-column: auto;
	}
}

/* Respect reduced-motion preferences. */
@media (prefers-reduced-motion: reduce) {
	.pde-root *,
	.pde-root *::before,
	.pde-root *::after {
		transition-duration: 0.01ms !important;
		animation-duration: 0.01ms !important;
	}
}