/**
 * Paragraph Duplicate Finder Pro — style.css
 *
 * Design: Refined editorial / utilitarian dark-accent theme.
 * Font pairing: "DM Mono" (headings/labels) + "Source Serif 4" (body/text).
 * Color system: Deep navy-charcoal base, electric teal accent, amber warning.
 *
 * @package ParagraphDuplicateFinderPro
 * @version 1.0.0
 */

/* ── Google Fonts ───────────────────────────────────────────────────────── */
@import url('https://fonts.googleapis.com/css2?family=DM+Mono:ital,wght@0,300;0,400;0,500;1,400&family=Source+Serif+4:ital,opsz,wght@0,8..60,300;0,8..60,400;0,8..60,600;1,8..60,400&display=swap');

/* ── Custom Properties ──────────────────────────────────────────────────── */
:root {
	--pdfp-bg:           #0f1117;
	--pdfp-surface:      #181c27;
	--pdfp-surface-2:    #1e2333;
	--pdfp-surface-3:    #252b3d;
	--pdfp-border:       #2a3050;
	--pdfp-border-light: #364064;

	--pdfp-text:         #e8eaf2;
	--pdfp-text-muted:   #8b93b4;
	--pdfp-text-faint:   #4d566e;

	--pdfp-accent:       #00d4b1;
	--pdfp-accent-dim:   #009e84;
	--pdfp-accent-glow:  rgba(0, 212, 177, 0.15);

	--pdfp-red:          #f05252;
	--pdfp-orange:       #f59e0b;
	--pdfp-yellow:       #fde68a;
	--pdfp-green:        #34d399;
	--pdfp-blue:         #60a5fa;

	--pdfp-radius:       8px;
	--pdfp-radius-lg:    14px;
	--pdfp-radius-sm:    4px;

	--pdfp-shadow:       0 4px 24px rgba(0,0,0,0.45);
	--pdfp-shadow-sm:    0 2px 8px rgba(0,0,0,0.3);

	--pdfp-font-mono:    'DM Mono', 'Courier New', monospace;
	--pdfp-font-body:    'Source Serif 4', Georgia, serif;

	--pdfp-transition:   0.18s ease;
}

/* ── Reset / Base ───────────────────────────────────────────────────────── */
#pdfp-app *,
#pdfp-app *::before,
#pdfp-app *::after {
	box-sizing: border-box;
}

#pdfp-app {
	font-family: var(--pdfp-font-body);
	color: var(--pdfp-text);
	background: var(--pdfp-bg);
	border-radius: var(--pdfp-radius-lg);
	padding: 0;
	overflow: hidden;
	box-shadow: var(--pdfp-shadow);
	border: 1px solid var(--pdfp-border);
	max-width: 1280px;
	margin: 2rem auto;
}

/* ── Header ─────────────────────────────────────────────────────────────── */
.pdfp-header {
	background: var(--pdfp-surface);
	border-bottom: 1px solid var(--pdfp-border);
	padding: 1.5rem 2rem;
}

.pdfp-header__inner {
	display: flex;
	align-items: center;
	gap: 1rem;
}

.pdfp-header__icon {
	font-size: 2rem;
	color: var(--pdfp-accent);
	line-height: 1;
	animation: pdfp-spin 8s linear infinite;
}

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

.pdfp-header__title {
	font-family: var(--pdfp-font-mono);
	font-size: 1.15rem;
	font-weight: 500;
	color: var(--pdfp-text);
	margin: 0 0 0.2rem;
	letter-spacing: -0.01em;
}

.pdfp-header__subtitle {
	font-family: var(--pdfp-font-mono);
	font-size: 0.72rem;
	color: var(--pdfp-text-muted);
	margin: 0;
	letter-spacing: 0.02em;
}

/* ── Two-Column Grid ────────────────────────────────────────────────────── */
.pdfp-grid {
	display: grid;
	grid-template-columns: 1fr 1fr;
	min-height: 600px;
}

/* ── Panels ─────────────────────────────────────────────────────────────── */
.pdfp-panel {
	padding: 1.75rem;
	display: flex;
	flex-direction: column;
	gap: 1.1rem;
}

.pdfp-panel--input {
	background: var(--pdfp-surface);
	border-right: 1px solid var(--pdfp-border);
}

.pdfp-panel--results {
	background: var(--pdfp-bg);
}

.pdfp-panel__head {
	display: flex;
	align-items: center;
	justify-content: space-between;
	flex-wrap: wrap;
	gap: 0.5rem;
}

.pdfp-panel__title {
	font-family: var(--pdfp-font-mono);
	font-size: 0.78rem;
	font-weight: 500;
	text-transform: uppercase;
	letter-spacing: 0.08em;
	color: var(--pdfp-text-muted);
	margin: 0;
}

/* ── Char count ─────────────────────────────────────────────────────────── */
.pdfp-char-count {
	font-family: var(--pdfp-font-mono);
	font-size: 0.72rem;
	color: var(--pdfp-text-faint);
	transition: color var(--pdfp-transition);
}
.pdfp-char-count--warn { color: var(--pdfp-orange); }
.pdfp-char-count--over { color: var(--pdfp-red); }

/* ── Textarea ────────────────────────────────────────────────────────────── */
.pdfp-textarea {
	width: 100%;
	flex: 1;
	min-height: 220px;
	background: var(--pdfp-bg);
	color: var(--pdfp-text);
	border: 1px solid var(--pdfp-border);
	border-radius: var(--pdfp-radius);
	padding: 1rem 1.1rem;
	font-family: var(--pdfp-font-body);
	font-size: 0.92rem;
	line-height: 1.65;
	resize: vertical;
	transition: border-color var(--pdfp-transition), box-shadow var(--pdfp-transition);
	outline: none;
}
.pdfp-textarea:focus {
	border-color: var(--pdfp-accent-dim);
	box-shadow: 0 0 0 3px var(--pdfp-accent-glow);
}
.pdfp-textarea::placeholder {
	color: var(--pdfp-text-faint);
	font-style: italic;
}

/* ── Options ────────────────────────────────────────────────────────────── */
.pdfp-options {
	display: flex;
	flex-direction: column;
	gap: 0.85rem;
}

.pdfp-options__row {
	display: flex;
	flex-wrap: wrap;
	align-items: center;
	gap: 0.75rem;
}

.pdfp-option-group {
	display: flex;
	flex-direction: column;
	gap: 0.3rem;
	flex: 1;
	min-width: 120px;
}

.pdfp-label {
	font-family: var(--pdfp-font-mono);
	font-size: 0.7rem;
	text-transform: uppercase;
	letter-spacing: 0.07em;
	color: var(--pdfp-text-muted);
	display: flex;
	align-items: center;
	gap: 0.4rem;
}

.pdfp-label strong {
	color: var(--pdfp-accent);
	font-weight: 500;
}

.pdfp-select {
	background: var(--pdfp-surface-2);
	color: var(--pdfp-text);
	border: 1px solid var(--pdfp-border);
	border-radius: var(--pdfp-radius-sm);
	padding: 0.45rem 0.7rem;
	font-family: var(--pdfp-font-mono);
	font-size: 0.8rem;
	cursor: pointer;
	outline: none;
	transition: border-color var(--pdfp-transition);
	appearance: none;
	background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6'%3E%3Cpath d='M0 0l5 6 5-6z' fill='%238b93b4'/%3E%3C/svg%3E");
	background-repeat: no-repeat;
	background-position: right 0.6rem center;
	padding-right: 2rem;
}
.pdfp-select:focus {
	border-color: var(--pdfp-accent-dim);
}

/* Threshold row */
.pdfp-options__row--threshold {
	flex-direction: column;
	align-items: flex-start;
}

.pdfp-slider-wrap {
	display: flex;
	align-items: center;
	gap: 0.6rem;
	width: 100%;
}

.pdfp-slider-min,
.pdfp-slider-max {
	font-family: var(--pdfp-font-mono);
	font-size: 0.68rem;
	color: var(--pdfp-text-faint);
	white-space: nowrap;
}

.pdfp-slider {
	flex: 1;
	-webkit-appearance: none;
	appearance: none;
	height: 4px;
	border-radius: 2px;
	background: linear-gradient(to right, var(--pdfp-accent) 0%, var(--pdfp-accent) var(--pdfp-slider-pct, 80%), var(--pdfp-border) var(--pdfp-slider-pct, 80%));
	outline: none;
	cursor: pointer;
}

.pdfp-slider::-webkit-slider-thumb {
	-webkit-appearance: none;
	width: 16px;
	height: 16px;
	border-radius: 50%;
	background: var(--pdfp-accent);
	border: 2px solid var(--pdfp-bg);
	box-shadow: 0 0 0 2px var(--pdfp-accent-dim);
	cursor: pointer;
	transition: transform var(--pdfp-transition);
}
.pdfp-slider::-webkit-slider-thumb:hover {
	transform: scale(1.2);
}
.pdfp-slider::-moz-range-thumb {
	width: 16px;
	height: 16px;
	border-radius: 50%;
	background: var(--pdfp-accent);
	border: 2px solid var(--pdfp-bg);
	cursor: pointer;
}

/* Toggle checkbox */
.pdfp-toggle {
	display: flex;
	align-items: center;
	gap: 0.6rem;
	cursor: pointer;
	user-select: none;
}
.pdfp-toggle input[type="checkbox"] {
	position: absolute;
	opacity: 0;
	width: 0; height: 0;
}
.pdfp-toggle__track {
	width: 34px;
	height: 18px;
	border-radius: 9px;
	background: var(--pdfp-border);
	position: relative;
	transition: background var(--pdfp-transition);
	flex-shrink: 0;
}
.pdfp-toggle__track::after {
	content: '';
	position: absolute;
	top: 2px; left: 2px;
	width: 14px; height: 14px;
	border-radius: 50%;
	background: var(--pdfp-text-muted);
	transition: transform var(--pdfp-transition), background var(--pdfp-transition);
}
.pdfp-toggle input:checked + .pdfp-toggle__track {
	background: var(--pdfp-accent-dim);
}
.pdfp-toggle input:checked + .pdfp-toggle__track::after {
	transform: translateX(16px);
	background: var(--pdfp-text);
}
.pdfp-toggle__label {
	font-family: var(--pdfp-font-mono);
	font-size: 0.75rem;
	color: var(--pdfp-text-muted);
}

/* ── Buttons ────────────────────────────────────────────────────────────── */
.pdfp-actions {
	display: flex;
	flex-wrap: wrap;
	gap: 0.6rem;
}

.pdfp-btn {
	font-family: var(--pdfp-font-mono);
	font-size: 0.8rem;
	font-weight: 500;
	letter-spacing: 0.03em;
	padding: 0.6rem 1.2rem;
	border-radius: var(--pdfp-radius-sm);
	border: 1px solid transparent;
	cursor: pointer;
	display: inline-flex;
	align-items: center;
	gap: 0.4rem;
	transition:
		background var(--pdfp-transition),
		border-color var(--pdfp-transition),
		color var(--pdfp-transition),
		transform 0.1s;
	text-decoration: none;
}
.pdfp-btn:active { transform: scale(0.97); }

.pdfp-btn--primary {
	background: var(--pdfp-accent);
	color: var(--pdfp-bg);
	border-color: var(--pdfp-accent);
}
.pdfp-btn--primary:hover {
	background: var(--pdfp-accent-dim);
	border-color: var(--pdfp-accent-dim);
}

.pdfp-btn--danger {
	background: var(--pdfp-red);
	color: #fff;
	border-color: var(--pdfp-red);
}
.pdfp-btn--danger:hover { filter: brightness(1.1); }

.pdfp-btn--ghost {
	background: transparent;
	color: var(--pdfp-text-muted);
	border-color: var(--pdfp-border);
}
.pdfp-btn--ghost:hover {
	border-color: var(--pdfp-border-light);
	color: var(--pdfp-text);
}

.pdfp-btn--sm {
	font-size: 0.72rem;
	padding: 0.38rem 0.75rem;
}

.pdfp-btn--warning {
	background: var(--pdfp-orange);
	color: var(--pdfp-bg);
	border-color: var(--pdfp-orange);
}
.pdfp-btn--warning:hover { filter: brightness(1.1); }

.pdfp-btn--outline {
	background: transparent;
	color: var(--pdfp-text-muted);
	border-color: var(--pdfp-border);
}
.pdfp-btn--outline:hover {
	border-color: var(--pdfp-accent-dim);
	color: var(--pdfp-accent);
}

.pdfp-btn__icon {
	opacity: 0.8;
}

/* Result action buttons row */
.pdfp-result-actions {
	display: flex;
	flex-wrap: wrap;
	gap: 0.5rem;
}

/* ── Progress Bar ────────────────────────────────────────────────────────── */
.pdfp-progress-wrap {
	display: flex;
	align-items: center;
	gap: 0.75rem;
}
.pdfp-progress-bar-track {
	flex: 1;
	height: 5px;
	background: var(--pdfp-border);
	border-radius: 3px;
	overflow: hidden;
}
.pdfp-progress-bar {
	height: 100%;
	background: linear-gradient(90deg, var(--pdfp-accent-dim), var(--pdfp-accent));
	border-radius: 3px;
	transition: width 0.2s ease;
}
.pdfp-progress-label {
	font-family: var(--pdfp-font-mono);
	font-size: 0.72rem;
	color: var(--pdfp-text-muted);
	min-width: 36px;
	text-align: right;
}

/* ── Summary Cards ───────────────────────────────────────────────────────── */
.pdfp-summary {
	display: grid;
	grid-template-columns: repeat(4, 1fr);
	gap: 0.75rem;
}

.pdfp-card {
	background: var(--pdfp-surface);
	border: 1px solid var(--pdfp-border);
	border-radius: var(--pdfp-radius);
	padding: 0.9rem;
	text-align: center;
	transition: border-color var(--pdfp-transition);
}
.pdfp-card:hover { border-color: var(--pdfp-border-light); }

.pdfp-card__num {
	font-family: var(--pdfp-font-mono);
	font-size: 1.6rem;
	font-weight: 500;
	line-height: 1;
	margin-bottom: 0.3rem;
}
.pdfp-card__lbl {
	font-family: var(--pdfp-font-mono);
	font-size: 0.65rem;
	text-transform: uppercase;
	letter-spacing: 0.07em;
	color: var(--pdfp-text-muted);
}

.pdfp-card--total   .pdfp-card__num { color: var(--pdfp-blue); }
.pdfp-card--dupes   .pdfp-card__num { color: var(--pdfp-red); }
.pdfp-card--near    .pdfp-card__num { color: var(--pdfp-orange); }
.pdfp-card--unique  .pdfp-card__num { color: var(--pdfp-green); }

/* ── Results List ───────────────────────────────────────────────────────── */
.pdfp-results-list {
	display: flex;
	flex-direction: column;
	gap: 0.5rem;
	overflow-y: auto;
	max-height: 560px;
	padding-right: 2px;
}

/* Scrollbar styling */
.pdfp-results-list::-webkit-scrollbar { width: 5px; }
.pdfp-results-list::-webkit-scrollbar-track { background: transparent; }
.pdfp-results-list::-webkit-scrollbar-thumb {
	background: var(--pdfp-border);
	border-radius: 3px;
}

/* ── Empty State ────────────────────────────────────────────────────────── */
.pdfp-empty-state {
	text-align: center;
	padding: 3rem 1rem;
	color: var(--pdfp-text-faint);
}
.pdfp-empty-state__icon {
	font-size: 2.5rem;
	margin-bottom: 0.75rem;
	opacity: 0.3;
}
.pdfp-empty-state p {
	font-family: var(--pdfp-font-mono);
	font-size: 0.8rem;
	margin: 0;
}

/* ── Accordion Groups ───────────────────────────────────────────────────── */
.pdfp-group {
	border: 1px solid var(--pdfp-border);
	border-radius: var(--pdfp-radius);
	overflow: hidden;
	transition: border-color var(--pdfp-transition);
}
.pdfp-group:hover { border-color: var(--pdfp-border-light); }

.pdfp-group__toggle {
	width: 100%;
	background: var(--pdfp-surface);
	border: none;
	padding: 0.85rem 1rem;
	cursor: pointer;
	display: flex;
	align-items: center;
	gap: 0.6rem;
	text-align: left;
	color: var(--pdfp-text);
	transition: background var(--pdfp-transition);
	flex-wrap: wrap;
}
.pdfp-group__toggle:hover { background: var(--pdfp-surface-2); }
.pdfp-group__toggle.is-open { background: var(--pdfp-surface-2); }

.pdfp-group__toggle-left {
	display: flex;
	align-items: center;
	gap: 0.5rem;
	flex-shrink: 0;
}

.pdfp-group__caret {
	font-size: 1rem;
	color: var(--pdfp-accent);
	transition: transform var(--pdfp-transition);
	display: inline-block;
}
.pdfp-group__toggle.is-open .pdfp-group__caret {
	transform: rotate(90deg);
}

.pdfp-group__num {
	font-family: var(--pdfp-font-mono);
	font-size: 0.72rem;
	font-weight: 500;
	color: var(--pdfp-text-muted);
}

.pdfp-group__preview {
	font-family: var(--pdfp-font-body);
	font-size: 0.8rem;
	color: var(--pdfp-text-faint);
	flex: 1;
	overflow: hidden;
	text-overflow: ellipsis;
	white-space: nowrap;
	font-style: italic;
}

.pdfp-group__body {
	border-top: 1px solid var(--pdfp-border);
	display: flex;
	flex-direction: column;
	gap: 0;
}

/* ── Paragraph Items ────────────────────────────────────────────────────── */
.pdfp-para {
	padding: 1rem 1.1rem;
	border-bottom: 1px solid var(--pdfp-border);
}
.pdfp-para:last-child { border-bottom: none; }

.pdfp-para--primary { background: var(--pdfp-surface-2); }
.pdfp-para--match   { background: var(--pdfp-bg); }

.pdfp-para__meta {
	display: flex;
	align-items: center;
	flex-wrap: wrap;
	gap: 0.5rem;
	margin-bottom: 0.5rem;
}

.pdfp-para__label {
	font-family: var(--pdfp-font-mono);
	font-size: 0.65rem;
	text-transform: uppercase;
	letter-spacing: 0.07em;
	color: var(--pdfp-text-muted);
	font-weight: 500;
}

.pdfp-para__idx,
.pdfp-para__chars {
	font-family: var(--pdfp-font-mono);
	font-size: 0.65rem;
	color: var(--pdfp-text-faint);
}

.pdfp-para__text {
	font-family: var(--pdfp-font-body);
	font-size: 0.87rem;
	line-height: 1.7;
	color: var(--pdfp-text);
	white-space: pre-wrap;
	word-break: break-word;
}

/* Diff highlight */
mark.pdfp-diff {
	background: rgba(245, 158, 11, 0.25);
	color: var(--pdfp-yellow);
	border-radius: 2px;
	padding: 0 2px;
}

/* ── Badges ─────────────────────────────────────────────────────────────── */
.pdfp-badge {
	font-family: var(--pdfp-font-mono);
	font-size: 0.62rem;
	font-weight: 500;
	letter-spacing: 0.04em;
	padding: 0.2rem 0.5rem;
	border-radius: 3px;
	text-transform: uppercase;
}
.pdfp-badge--red    { background: rgba(240,82,82,0.2);   color: var(--pdfp-red); }
.pdfp-badge--orange { background: rgba(245,158,11,0.2);  color: var(--pdfp-orange); }
.pdfp-badge--yellow { background: rgba(253,230,138,0.15);color: var(--pdfp-yellow); }
.pdfp-badge--sim    { background: rgba(0,212,177,0.12);  color: var(--pdfp-accent); }
.pdfp-badge--exact  { background: rgba(96,165,250,0.15); color: var(--pdfp-blue); }

/* ── Toast Notifications ────────────────────────────────────────────────── */
.pdfp-toast-container {
	position: fixed;
	bottom: 1.5rem;
	right: 1.5rem;
	z-index: 99999;
	display: flex;
	flex-direction: column;
	gap: 0.5rem;
	pointer-events: none;
}

.pdfp-toast {
	display: flex;
	align-items: center;
	gap: 0.6rem;
	background: var(--pdfp-surface-3);
	border: 1px solid var(--pdfp-border);
	border-radius: var(--pdfp-radius);
	padding: 0.7rem 1rem;
	font-family: var(--pdfp-font-mono);
	font-size: 0.78rem;
	color: var(--pdfp-text);
	box-shadow: var(--pdfp-shadow);
	min-width: 220px;
	max-width: 360px;
	pointer-events: auto;
	transform: translateY(12px);
	opacity: 0;
	transition: opacity 0.25s ease, transform 0.25s ease;
}
.pdfp-toast.is-visible {
	opacity: 1;
	transform: translateY(0);
}

.pdfp-toast__icon {
	font-size: 0.9rem;
	flex-shrink: 0;
}

.pdfp-toast--success .pdfp-toast__icon { color: var(--pdfp-green); }
.pdfp-toast--error   .pdfp-toast__icon { color: var(--pdfp-red); }
.pdfp-toast--warn    .pdfp-toast__icon { color: var(--pdfp-orange); }
.pdfp-toast--info    .pdfp-toast__icon { color: var(--pdfp-blue); }

/* ── Admin Page ─────────────────────────────────────────────────────────── */
.pdfp-admin-wrap {
	max-width: 780px;
}
.pdfp-admin-title {
	font-family: var(--pdfp-font-mono, monospace);
	display: flex;
	align-items: center;
	gap: 0.6rem;
}
.pdfp-admin-title__icon {
	font-size: 1.3rem;
	color: #009e84;
}
.pdfp-admin-card {
	background: #fff;
	border: 1px solid #e2e8f0;
	border-radius: 8px;
	padding: 1.5rem 2rem;
	margin-bottom: 1.25rem;
	box-shadow: 0 1px 4px rgba(0,0,0,0.06);
}
.pdfp-admin-info h2 {
	font-size: 1rem;
	margin-bottom: 0.75rem;
}
.pdfp-admin-info ol {
	margin-left: 1.25rem;
}
.pdfp-admin-info code {
	background: #f1f5f9;
	padding: 0.15em 0.4em;
	border-radius: 3px;
	font-size: 0.88em;
}

/* ── Responsive ──────────────────────────────────────────────────────────── */
@media ( max-width: 880px ) {
	.pdfp-grid {
		grid-template-columns: 1fr;
	}
	.pdfp-panel--input {
		border-right: none;
		border-bottom: 1px solid var(--pdfp-border);
	}
	.pdfp-summary {
		grid-template-columns: repeat(2, 1fr);
	}
}

@media ( max-width: 520px ) {
	.pdfp-header {
		padding: 1.1rem;
	}
	.pdfp-panel {
		padding: 1.1rem;
	}
	.pdfp-summary {
		grid-template-columns: repeat(2, 1fr);
	}
	.pdfp-options__row {
		flex-direction: column;
		align-items: stretch;
	}
	.pdfp-result-actions {
		flex-direction: column;
	}
	.pdfp-btn--sm {
		text-align: center;
		justify-content: center;
	}
	.pdfp-toast-container {
		right: 0.75rem;
		left: 0.75rem;
	}
}