/* ===== CSS Custom Properties (Dark theme = default) ===== */
:root {
	/* Surfaces */
	--bg-body: #121212;
	--bg-header: #0d0d0d;
	--bg-surface: #1e1e1e;
	--bg-surface-raised: #252525;
	--bg-input: #1a1a1a;
	--bg-hover: #2e2e2e;
	--bg-button: #2a2a2a;

	/* Borders */
	--border-default: #444;
	--border-subtle: #333;
	--border-input: #444;
	--border-divider: #2a2a2a;

	/* Text */
	--text-primary: #e0e0e0;
	--text-secondary: #ccc;
	--text-muted: #aaa;
	--text-dim: #888;
	--text-dimmer: #666;
	--text-brand: #fff;
	--text-link: #7eb8f7;

	/* Accents */
	--accent-primary: #3b82f6;
	--accent-primary-hover: #2563eb;
	--accent-danger: #991b1b;
	--accent-danger-hover: #b91c1c;
	--accent-danger-text: #fca5a5;
	--accent-success: #22c55e;
	--accent-success-bg: #14532d20;
	--accent-success-border: #16a34a;
	--accent-success-text: #86efac;
	--accent-warning: #eab308;
	--accent-error-bg: #450a0a30;
	--accent-error-border: #991b1b;

	/* Selection */
	--bg-selected: #1e3a5f;
	--bg-selected-hover: #234b75;

	/* Spinner */
	--spinner-track: #444;
	--spinner-accent: #3b82f6;

	/* Shadows */
	--shadow-sm: 0 1px 2px rgba(0,0,0,0.3);
	--shadow-md: 0 4px 12px rgba(0,0,0,0.4);
	--shadow-lg: 0 8px 24px rgba(0,0,0,0.5);

	/* Progress */
	--progress-track: #333;
	--progress-fill: #3b82f6;

	/* Input validation */
	--input-valid: #16a34a;
	--input-invalid: #dc2626;

	/* Badge colors */
	--badge-best-bg: #3b82f6;
	--badge-clip-bg: #8b5cf6;

	/* Card */
	--card-border: #333;
	--card-hover-border: #3b82f6;

	/* Metadata comparison */
	--meta-best: #4ade80;
	--meta-worst: #f87171;
	--meta-equal: #888;
}

/* ===== Light Theme ===== */
[data-theme="light"] {
	--bg-body: #f8fafc;
	--bg-header: #ffffff;
	--bg-surface: #ffffff;
	--bg-surface-raised: #f1f5f9;
	--bg-input: #ffffff;
	--bg-hover: #e2e8f0;
	--bg-button: #e2e8f0;

	--border-default: #cbd5e1;
	--border-subtle: #e2e8f0;
	--border-input: #94a3b8;
	--border-divider: #e2e8f0;

	--text-primary: #0f172a;
	--text-secondary: #1e293b;
	--text-muted: #64748b;
	--text-dim: #94a3b8;
	--text-dimmer: #94a3b8;
	--text-brand: #0f172a;
	--text-link: #2563eb;

	--accent-primary: #2563eb;
	--accent-primary-hover: #1d4ed8;
	--accent-danger: #dc2626;
	--accent-danger-hover: #b91c1c;
	--accent-danger-text: #dc2626;
	--accent-success: #16a34a;
	--accent-success-bg: #f0fdf4;
	--accent-success-border: #86efac;
	--accent-success-text: #15803d;
	--accent-warning: #ca8a04;
	--accent-error-bg: #fef2f2;
	--accent-error-border: #fecaca;

	--bg-selected: #dbeafe;
	--bg-selected-hover: #bfdbfe;

	--spinner-track: #cbd5e1;
	--spinner-accent: #2563eb;

	--shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
	--shadow-md: 0 4px 12px rgba(0,0,0,0.08);
	--shadow-lg: 0 8px 24px rgba(0,0,0,0.12);

	--progress-track: #e2e8f0;
	--progress-fill: #2563eb;

	--input-valid: #16a34a;
	--input-invalid: #dc2626;

	--badge-best-bg: #2563eb;
	--badge-clip-bg: #7c3aed;

	--card-border: #e2e8f0;
	--card-hover-border: #2563eb;

	--meta-best: #16a34a;
	--meta-worst: #dc2626;
	--meta-equal: #94a3b8;
}

/* ===== Reset ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

/* ===== Base ===== */
body {
	font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
	background: var(--bg-body);
	color: var(--text-primary);
	font-size: 14px;
	line-height: 1.5;
	-webkit-font-smoothing: antialiased;
}

a { color: var(--text-link); text-decoration: none; transition: color 0.15s; }
a:hover { text-decoration: underline; }

h1 { font-size: 1.5rem; font-weight: 600; margin-bottom: 1.25rem; }
h2 { font-size: 0.85rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.05em; margin: 1.25rem 0 0.6rem; color: var(--text-muted); }

/* ===== Layout — Top Header Bar ===== */
.layout { display: flex; flex-direction: column; min-height: 100vh; }

.top-bar {
	display: flex;
	align-items: center;
	height: 52px;
	padding: 0 1.5rem;
	background: var(--bg-header);
	border-bottom: 1px solid var(--border-subtle);
	position: sticky;
	top: 0;
	z-index: 50;
	box-shadow: var(--shadow-sm);
	flex-shrink: 0;
	gap: 1.5rem;
}

.brand {
	font-weight: 800;
	font-size: 1.1rem;
	color: var(--text-brand);
	letter-spacing: 0.05em;
	flex-shrink: 0;
}

.nav-links {
	display: flex;
	gap: 0.25rem;
	flex: 1;
}
.nav-links a {
	padding: 0.4rem 0.75rem;
	border-radius: 6px;
	color: var(--text-muted);
	font-size: 13px;
	font-weight: 500;
	transition: background 0.15s, color 0.15s;
	position: relative;
}
.nav-links a:hover { background: var(--bg-hover); color: var(--text-primary); text-decoration: none; }
.nav-links a.active {
	color: var(--accent-primary);
	background: transparent;
}
.nav-links a.active::after {
	content: '';
	position: absolute;
	bottom: -0.55rem;
	left: 0.75rem;
	right: 0.75rem;
	height: 2px;
	background: var(--accent-primary);
	border-radius: 1px;
}

.header-actions {
	display: flex;
	align-items: center;
	gap: 0.5rem;
	flex-shrink: 0;
}

.theme-toggle {
	background: transparent;
	border: 1px solid var(--border-default);
	color: var(--text-muted);
	width: 34px;
	height: 34px;
	border-radius: 8px;
	cursor: pointer;
	display: flex;
	align-items: center;
	justify-content: center;
	font-size: 16px;
	padding: 0;
	transition: background 0.15s, color 0.15s, border-color 0.15s;
}
.theme-toggle:hover {
	background: var(--bg-hover);
	color: var(--text-primary);
	border-color: var(--text-dim);
}

.content {
	flex: 1;
	padding: 1.75rem 2rem;
	max-width: 1400px;
	width: 100%;
	margin: 0 auto;
	overflow-y: auto;
}

/* ===== Buttons ===== */
button {
	padding: 0.45rem 1rem;
	border: 1px solid var(--border-default);
	background: var(--bg-button);
	color: var(--text-primary);
	border-radius: 6px;
	cursor: pointer;
	font-size: 13px;
	font-weight: 500;
	transition: background 0.15s, border-color 0.15s, box-shadow 0.15s;
	line-height: 1.4;
}
button:hover { background: var(--bg-hover); border-color: var(--text-dim); }
button:active { transform: translateY(1px); }
button:disabled { opacity: 0.4; cursor: not-allowed; transform: none; }
button.primary { background: var(--accent-primary); border-color: var(--accent-primary); color: #fff; }
button.primary:hover:not(:disabled) { background: var(--accent-primary-hover); border-color: var(--accent-primary-hover); }
button.danger { background: var(--accent-danger); border-color: var(--accent-danger); color: #fff; }
button.danger:hover:not(:disabled) { background: var(--accent-danger-hover); border-color: var(--accent-danger-hover); }
button.danger-outline { border-color: var(--accent-danger); color: var(--accent-danger-text); background: transparent; }
button.danger-outline:hover:not(:disabled) { background: var(--accent-error-bg); }

/* ===== Inputs ===== */
input[type=text], input[type=number], input[type=password], select {
	background: var(--bg-input);
	border: 1px solid var(--border-input);
	color: var(--text-primary);
	padding: 0.4rem 0.6rem;
	border-radius: 6px;
	font-size: 13px;
	transition: border-color 0.15s, box-shadow 0.15s;
}
input[type=text]:focus, input[type=number]:focus, select:focus {
	outline: none;
	border-color: var(--accent-primary);
	box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.2);
}
input.input-valid { border-color: var(--input-valid); }
input.input-valid:focus { box-shadow: 0 0 0 2px rgba(34, 197, 94, 0.2); }
input.input-invalid { border-color: var(--input-invalid); }
input.input-invalid:focus { box-shadow: 0 0 0 2px rgba(220, 38, 38, 0.2); }

/* ===== Scan Config ===== */
.scan-config { max-width: 680px; }
.path-list { display: flex; flex-direction: column; gap: 0.35rem; margin-bottom: 0.6rem; }
.path-entry {
	display: flex;
	align-items: center;
	gap: 0.6rem;
	background: var(--bg-surface);
	padding: 0.45rem 0.75rem;
	border-radius: 6px;
	border: 1px solid var(--border-subtle);
}
.path-entry span:not(.path-status) { flex: 1; word-break: break-all; font-size: 13px; }
.path-entry button { padding: 0.15rem 0.45rem; font-size: 11px; }
.path-status { font-size: 12px; font-weight: 700; flex-shrink: 0; }
.path-status.valid { color: var(--accent-success); }
.path-status.invalid { color: var(--accent-danger-text); }
.add-path { display: flex; gap: 0.5rem; }
.add-path input { flex: 1; }
.start-row { display: flex; gap: 0.5rem; margin-top: 1.75rem; flex-wrap: wrap; align-items: center; }
.done-msg { margin-top: 0.75rem; color: var(--accent-success-text); }
.aborted-msg { margin-top: 0.75rem; color: var(--accent-danger-text); }

/* ===== Progress ===== */
.progress-section { max-width: 680px; }
.state-label { margin-bottom: 0.6rem; color: var(--text-muted); display: flex; align-items: center; gap: 0.5rem; font-weight: 500; }
.progress-bar-track { height: 10px; background: var(--progress-track); border-radius: 5px; overflow: hidden; margin-bottom: 0.5rem; }
.progress-bar-fill { height: 100%; background: var(--progress-fill); transition: width 0.3s ease; border-radius: 5px; }
.file-path { font-size: 12px; color: var(--text-dim); word-break: break-all; margin-top: 0.3rem; }
.comparing-note { font-size: 12px; color: var(--text-dimmer); margin-top: 0.3rem; }
.actions { display: flex; gap: 0.5rem; margin-top: 1rem; }

/* ===== Spinner ===== */
.spinner {
	display: inline-block;
	width: 14px;
	height: 14px;
	border: 2px solid var(--spinner-track);
	border-top-color: var(--spinner-accent);
	border-radius: 50%;
	animation: spin 0.8s linear infinite;
	flex-shrink: 0;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ===== FFmpeg Setup Banner ===== */
.ffmpeg-banner {
	display: flex;
	align-items: center;
	gap: 0.75rem;
	padding: 0.75rem 1rem;
	border-radius: 8px;
	margin-bottom: 1.25rem;
	font-size: 13px;
}
.ffmpeg-banner.checking { background: var(--bg-surface); border: 1px solid var(--border-subtle); color: var(--text-muted); }
.ffmpeg-banner.downloading { background: var(--accent-success-bg); border: 1px solid var(--accent-success-border); color: var(--accent-success-text); }
.ffmpeg-banner.warning { background: var(--accent-error-bg); border: 1px solid var(--accent-error-border); color: var(--accent-danger-text); }
.ffmpeg-banner.failed { background: var(--accent-error-bg); border: 1px solid var(--accent-error-border); color: var(--accent-danger-text); }
.ffmpeg-banner .progress-bar-track { flex: 1; margin: 0; }
.ffmpeg-banner strong { font-weight: 600; }
.ffmpeg-banner p { margin: 0.25rem 0 0.5rem; }

/* ===== Thumbnail Retrieval Progress ===== */
.thumb-progress {
	display: flex;
	align-items: center;
	gap: 0.6rem;
	font-size: 12px;
	color: var(--text-dim);
	margin-bottom: 1rem;
	padding: 0.5rem 0.75rem;
	background: var(--bg-surface);
	border: 1px solid var(--border-subtle);
	border-radius: 8px;
}
.inline-bar { flex: 1; margin: 0; }

/* ===== Results Toolbar ===== */
.results-toolbar {
	display: flex;
	align-items: center;
	gap: 0.6rem;
	flex-wrap: wrap;
	margin-bottom: 1rem;
	padding: 0.75rem 1rem;
	background: var(--bg-surface);
	border: 1px solid var(--border-subtle);
	border-radius: 8px;
}
.search-box { flex: 1; min-width: 200px; max-width: 340px; }
.result-count { font-size: 12px; color: var(--text-dim); flex-shrink: 0; }
.action-group { display: flex; gap: 0.4rem; flex-wrap: wrap; }

/* ===== Action / Confirm Panels ===== */
.action-panel, .confirm-panel {
	display: flex;
	align-items: center;
	gap: 0.6rem;
	flex-wrap: wrap;
	background: var(--bg-surface);
	border: 1px solid var(--border-subtle);
	border-radius: 8px;
	padding: 0.75rem 1rem;
	margin-bottom: 1rem;
	font-size: 13px;
}
.action-panel label { display: flex; align-items: center; gap: 0.4rem; }
.action-panel input[type=text] { min-width: 260px; }
.confirm-panel strong { color: var(--accent-warning); }
.warn-text { color: var(--accent-danger-text); font-size: 12px; }

/* ===== Notification Boxes ===== */
.info-box {
	padding: 0.6rem 0.85rem;
	background: var(--accent-success-bg);
	border: 1px solid var(--accent-success-border);
	border-radius: 8px;
	margin-bottom: 1rem;
	font-size: 13px;
	color: var(--accent-success-text);
}
.error-box {
	max-width: 680px;
	background: var(--accent-error-bg);
	border: 1px solid var(--accent-error-border);
	border-radius: 8px;
	padding: 1rem 1.25rem;
	margin-bottom: 1rem;
}
.error-box strong { color: var(--accent-danger-text); display: block; margin-bottom: 0.4rem; }
.error-box p { color: var(--text-secondary); font-family: 'SF Mono', 'Cascadia Code', monospace; font-size: 13px; word-break: break-all; margin-bottom: 0.75rem; }
.error-box button { font-size: 12px; }

/* ===== Duplicate Groups ===== */
.dup-group {
	background: var(--bg-surface);
	border: 1px solid var(--border-subtle);
	border-radius: 10px;
	margin-bottom: 1.25rem;
	overflow: hidden;
	box-shadow: var(--shadow-sm);
	transition: box-shadow 0.15s;
}
.dup-group:hover { box-shadow: var(--shadow-md); }

.dup-group-header {
	background: var(--bg-surface-raised);
	padding: 0.6rem 1rem;
	font-size: 12px;
	color: var(--text-dim);
	border-bottom: 1px solid var(--border-subtle);
	display: flex;
	align-items: center;
	gap: 0.6rem;
	flex-wrap: wrap;
}
.group-select-all { display: flex; align-items: center; gap: 0.5rem; cursor: pointer; user-select: none; }
.similarity-badge {
	display: inline-flex;
	align-items: center;
	padding: 0.15rem 0.5rem;
	border-radius: 10px;
	font-size: 11px;
	font-weight: 600;
}
.similarity-badge.high { background: #16a34a30; color: var(--meta-best); }
.similarity-badge.medium { background: #3b82f630; color: var(--accent-primary); }
.similarity-badge.low { background: #eab30830; color: var(--accent-warning); }
.group-actions { margin-left: auto; display: flex; gap: 0.35rem; align-items: center; }
.group-actions button { padding: 0.2rem 0.55rem; font-size: 11px; }
.group-sort select { font-size: 11px; padding: 0.15rem 0.35rem; border-radius: 4px; background: var(--bg-input); border: 1px solid var(--border-input); color: var(--text-primary); }
.collapse-toggle {
	background: transparent;
	border: none;
	color: var(--text-dim);
	cursor: pointer;
	padding: 0.2rem 0.4rem;
	font-size: 14px;
	transition: color 0.15s;
}
.collapse-toggle:hover { color: var(--text-primary); background: transparent; }

/* ===== Card Layout ===== */
.dup-cards {
	display: flex;
	gap: 1rem;
	padding: 1rem;
	overflow-x: auto;
	scroll-snap-type: x mandatory;
}
.dup-cards::-webkit-scrollbar { height: 6px; }
.dup-cards::-webkit-scrollbar-track { background: transparent; }
.dup-cards::-webkit-scrollbar-thumb { background: var(--border-default); border-radius: 3px; }

.dup-card {
	flex: 0 0 280px;
	background: var(--bg-body);
	border: 2px solid var(--card-border);
	border-radius: 10px;
	overflow: hidden;
	transition: border-color 0.15s, box-shadow 0.15s, transform 0.15s;
	cursor: pointer;
	position: relative;
	scroll-snap-align: start;
}
.dup-card:hover {
	border-color: var(--card-hover-border);
	box-shadow: var(--shadow-md);
	transform: translateY(-2px);
}
.dup-card.selected {
	border-color: var(--accent-primary);
	background: var(--bg-selected);
}
.dup-card.selected:hover { background: var(--bg-selected-hover); }
.dup-card.best { border-color: var(--accent-primary); }
.dup-card.best::before {
	content: '';
	position: absolute;
	top: 0;
	left: 0;
	right: 0;
	height: 3px;
	background: linear-gradient(90deg, var(--accent-primary), var(--badge-clip-bg));
	z-index: 1;
}
.dup-card.hidden-card {
	display: none;
}

/* Card internals */
.card-top-bar {
	display: flex;
	align-items: center;
	justify-content: space-between;
	padding: 0.35rem 0.5rem;
	background: var(--bg-surface-raised);
	border-bottom: 1px solid var(--border-subtle);
}
.card-check { display: flex; align-items: center; cursor: pointer; }
.card-remove {
	background: transparent;
	border: none;
	color: var(--text-dim);
	cursor: pointer;
	padding: 0.1rem 0.35rem;
	font-size: 14px;
	border-radius: 4px;
	line-height: 1;
	transition: color 0.15s, background 0.15s;
}
.card-remove:hover { color: var(--accent-danger-text); background: var(--accent-error-bg); }
.card-hide {
	background: transparent;
	border: none;
	color: var(--text-dim);
	cursor: pointer;
	padding: 0.1rem 0.35rem;
	font-size: 12px;
	border-radius: 4px;
	line-height: 1;
	transition: color 0.15s, background 0.15s;
}
.card-hide:hover { color: var(--text-primary); background: var(--bg-hover); }

.card-thumb {
	width: 100%;
	aspect-ratio: 16 / 9;
	overflow: hidden;
	background: var(--progress-track);
	position: relative;
}
.card-thumb img {
	width: 100%;
	height: 100%;
	object-fit: cover;
	transition: transform 0.25s ease;
}
.dup-card:hover .card-thumb img { transform: scale(1.05); }
.card-thumb .similarity-overlay {
	position: absolute;
	bottom: 0.4rem;
	right: 0.4rem;
	background: rgba(0,0,0,0.75);
	color: #fff;
	padding: 0.15rem 0.4rem;
	border-radius: 4px;
	font-size: 11px;
	font-weight: 600;
	backdrop-filter: blur(4px);
}

.card-body { padding: 0.6rem 0.75rem; }
.card-filename {
	font-weight: 600;
	font-size: 13px;
	white-space: nowrap;
	overflow: hidden;
	text-overflow: ellipsis;
	margin-bottom: 0.15rem;
}
.card-path {
	font-size: 11px;
	color: var(--text-dim);
	white-space: nowrap;
	overflow: hidden;
	text-overflow: ellipsis;
	margin-bottom: 0.5rem;
	padding-bottom: 0.5rem;
	border-bottom: 1px solid var(--border-subtle);
}

/* ===== Metadata Grid ===== */
.card-meta { display: flex; flex-direction: column; gap: 0.15rem; }
.meta-row {
	display: flex;
	justify-content: space-between;
	align-items: center;
	font-size: 12px;
	padding: 0.2rem 0.35rem;
	border-radius: 4px;
	transition: background 0.15s;
}
.meta-row:hover { background: var(--bg-hover); }
.meta-label {
	color: var(--text-dim);
	cursor: default;
	user-select: none;
}
.meta-value { color: var(--text-primary); font-variant-numeric: tabular-nums; }
.meta-value.meta-best { color: var(--meta-best); font-weight: 600; }
.meta-value.meta-worst { color: var(--meta-worst); }
.meta-value.meta-equal { color: var(--meta-equal); }
.meta-value.meta-delta { font-size: 11px; }

/* ===== Badges ===== */
.card-badges { display: flex; gap: 0.35rem; flex-wrap: wrap; margin-top: 0.5rem; }
.badge-best { background: var(--badge-best-bg); color: #fff; padding: 0.15rem 0.45rem; border-radius: 4px; font-size: 11px; font-weight: 600; }
.badge-partial-clip { background: var(--badge-clip-bg); color: #fff; padding: 0.15rem 0.45rem; border-radius: 4px; font-size: 11px; font-weight: 600; }

/* ===== Hidden cards indicator ===== */
.hidden-indicator {
	display: flex;
	align-items: center;
	justify-content: center;
	padding: 0.75rem;
	font-size: 12px;
	color: var(--text-dim);
	cursor: pointer;
	transition: color 0.15s;
}
.hidden-indicator:hover { color: var(--text-primary); }

/* ===== Dropdown (auto-select) ===== */
.dropdown-wrap { position: relative; }
.dropdown-overlay { position: fixed; inset: 0; z-index: 99; }
.dropdown-menu {
	position: absolute;
	top: calc(100% + 4px);
	left: 0;
	z-index: 100;
	background: var(--bg-surface);
	border: 1px solid var(--border-default);
	border-radius: 8px;
	padding: 0.3rem 0;
	min-width: 200px;
	box-shadow: var(--shadow-lg);
}
.dropdown-menu button {
	display: block;
	width: 100%;
	text-align: left;
	background: none;
	border: none;
	border-radius: 0;
	padding: 0.4rem 0.85rem;
	color: var(--text-primary);
	font-size: 13px;
	cursor: pointer;
}
.dropdown-menu button:hover { background: var(--bg-hover); }
.dropdown-menu hr { border: none; border-top: 1px solid var(--border-subtle); margin: 0.25rem 0; }

/* ===== Context Menu ===== */
.ctx-overlay { position: fixed; inset: 0; z-index: 199; }
.ctx-menu {
	position: fixed;
	z-index: 200;
	background: var(--bg-surface);
	border: 1px solid var(--border-default);
	border-radius: 8px;
	padding: 0.3rem 0;
	min-width: 180px;
	box-shadow: var(--shadow-lg);
}
.ctx-menu button {
	display: block;
	width: 100%;
	text-align: left;
	background: none;
	border: none;
	border-radius: 0;
	padding: 0.4rem 0.85rem;
	color: var(--text-primary);
	font-size: 13px;
	cursor: pointer;
}
.ctx-menu button:hover { background: var(--bg-hover); }
.ctx-menu hr { border: none; border-top: 1px solid var(--border-subtle); margin: 0.25rem 0; }

/* ===== Settings ===== */
.settings-section { max-width: 560px; margin-bottom: 1.75rem; }
.settings-section label {
	display: flex;
	flex-direction: column;
	gap: 0.3rem;
	margin-bottom: 0.75rem;
	font-size: 13px;
	color: var(--text-secondary);
}
.settings-section input[type=number],
.settings-section input[type=text],
.settings-section select {
	background: var(--bg-input);
	border: 1px solid var(--border-input);
	color: var(--text-primary);
	padding: 0.4rem 0.6rem;
	border-radius: 6px;
	width: 100%;
}
.settings-section input[type=checkbox] { width: auto; margin-right: 0.5rem; }
.settings-section label:has(input[type=checkbox]) { flex-direction: row; align-items: center; }

/* ===== Responsive ===== */
@media (max-width: 768px) {
	.content { padding: 1rem; }
	.top-bar { padding: 0 1rem; }
	.dup-cards { flex-direction: column; }
	.dup-card { flex: 1 1 100%; }
	.nav-links a.active::after { bottom: -0.35rem; }
}

/* ===== Keyboard focus ===== */
.dup-group.focused {
	outline: 2px solid var(--accent-primary);
	outline-offset: 2px;
}

/* ===== Skeleton Loading ===== */
.thumb-skeleton {
	position: absolute;
	inset: 0;
	background: var(--bg-surface-raised);
	z-index: 1;
}
.thumb-skeleton::after {
	content: '';
	position: absolute;
	inset: 0;
	background: linear-gradient(90deg, transparent, var(--bg-hover), transparent);
	animation: skeleton-shimmer 1.5s ease-in-out infinite;
}
@keyframes skeleton-shimmer {
	0% { transform: translateX(-100%); }
	100% { transform: translateX(100%); }
}

/* Thumbnail disabled placeholder */
.thumb-placeholder {
	position: absolute;
	inset: 0;
	display: flex;
	align-items: center;
	justify-content: center;
	font-size: 12px;
	color: var(--text-dim);
	background: var(--bg-surface-raised);
}

/* Lazy-load fade-in */
.card-thumb img {
	opacity: 0;
	transition: opacity 0.3s ease, transform 0.25s ease;
}
.card-thumb img.loaded {
	opacity: 1;
}

/* ===== Comparison Modal ===== */
.compare-overlay {
	position: fixed;
	inset: 0;
	z-index: 1000;
	background: rgba(0, 0, 0, 0.85);
	backdrop-filter: blur(8px);
	display: none;
	flex-direction: column;
}
.compare-overlay.active {
	display: flex;
}
.compare-header {
	display: flex;
	align-items: center;
	justify-content: space-between;
	padding: 0.75rem 1.25rem;
	background: var(--bg-header);
	border-bottom: 1px solid var(--border-subtle);
	flex-shrink: 0;
}
.compare-header h3 {
	font-size: 14px;
	font-weight: 600;
	color: var(--text-primary);
	margin: 0;
}
.compare-close {
	background: transparent;
	border: 1px solid var(--border-default);
	color: var(--text-primary);
	width: 32px;
	height: 32px;
	border-radius: 6px;
	cursor: pointer;
	font-size: 16px;
	display: flex;
	align-items: center;
	justify-content: center;
	padding: 0;
}
.compare-close:hover { background: var(--bg-hover); }

.compare-mode-tabs {
	display: flex;
	gap: 0.25rem;
	padding: 0.5rem 1.25rem;
	background: var(--bg-surface);
	border-bottom: 1px solid var(--border-subtle);
	flex-shrink: 0;
}
.compare-mode-tabs button {
	padding: 0.35rem 0.75rem;
	font-size: 12px;
	border-radius: 4px;
}
.compare-mode-tabs button.active {
	background: var(--accent-primary);
	border-color: var(--accent-primary);
	color: #fff;
}

.compare-body {
	flex: 1;
	display: flex;
	overflow: hidden;
	position: relative;
}

/* Side-by-side mode */
.compare-side-by-side {
	display: flex;
	flex: 1;
	gap: 0;
}
.compare-pane {
	flex: 1;
	display: flex;
	flex-direction: column;
	overflow: hidden;
	position: relative;
}
.compare-pane-img {
	flex: 1;
	display: flex;
	align-items: center;
	justify-content: center;
	overflow: auto;
	padding: 0.5rem;
	min-height: 0;
}
.compare-pane-img img {
	max-width: 100%;
	max-height: 100%;
	object-fit: contain;
}
.compare-pane-info {
	padding: 0.4rem 0.75rem;
	background: var(--bg-surface);
	border-top: 1px solid var(--border-subtle);
	text-align: center;
}
.compare-pane-label {
	font-size: 12px;
	color: var(--text-primary);
	font-weight: 500;
	white-space: nowrap;
	overflow: hidden;
	text-overflow: ellipsis;
}
.compare-pane-meta {
	font-size: 11px;
	color: var(--text-muted);
}
.compare-pane-divider {
	width: 2px;
	background: var(--border-default);
	flex-shrink: 0;
}

/* Swipe mode — slider on the image */
.compare-swipe {
	flex: 1;
	position: relative;
	overflow: hidden;
	cursor: col-resize;
}
.compare-swipe-container {
	position: absolute;
	inset: 0;
	display: flex;
	align-items: center;
	justify-content: center;
}
.compare-swipe-container img {
	max-width: 100%;
	max-height: 100%;
	object-fit: contain;
	pointer-events: none;
	user-select: none;
}
.compare-swipe-img-a {
	position: absolute;
	inset: 0;
	display: flex;
	align-items: center;
	justify-content: center;
	z-index: 1;
}
.compare-swipe-img-b {
	position: absolute;
	inset: 0;
	display: flex;
	align-items: center;
	justify-content: center;
	z-index: 2;
	clip-path: inset(0 calc(100% - var(--swipe-pos, 50%)) 0 0);
}
/* Vertical divider line on the image */
.compare-swipe-line {
	position: absolute;
	top: 0;
	bottom: 0;
	left: var(--swipe-pos, 50%);
	width: 2px;
	background: #fff;
	z-index: 10;
	pointer-events: none;
	box-shadow: 0 0 4px rgba(0,0,0,0.5);
}
.compare-swipe-handle {
	position: absolute;
	top: 50%;
	left: var(--swipe-pos, 50%);
	transform: translate(-50%, -50%);
	width: 32px;
	height: 32px;
	background: #fff;
	border-radius: 50%;
	z-index: 11;
	cursor: col-resize;
	display: flex;
	align-items: center;
	justify-content: center;
	font-size: 14px;
	color: #333;
	box-shadow: 0 2px 8px rgba(0,0,0,0.3);
	user-select: none;
}
/* Labels on swipe */
.compare-swipe-label {
	position: absolute;
	top: 0.75rem;
	z-index: 5;
	background: rgba(0,0,0,0.6);
	color: #fff;
	padding: 0.2rem 0.6rem;
	border-radius: 4px;
	font-size: 11px;
	font-weight: 600;
	backdrop-filter: blur(4px);
}
.compare-swipe-label.label-a { left: 0.75rem; }
.compare-swipe-label.label-b { right: 0.75rem; }

/* Compare item selector — top position */
.compare-selector {
	display: flex;
	gap: 0.5rem;
	padding: 0.5rem 1.25rem;
	background: var(--bg-surface);
	border-bottom: 1px solid var(--border-subtle);
	flex-shrink: 0;
	overflow-x: auto;
}
.compare-selector-item {
	flex: 0 0 80px;
	cursor: pointer;
	border: 2px solid var(--border-subtle);
	border-radius: 6px;
	overflow: hidden;
	transition: border-color 0.15s;
}
.compare-selector-item:hover { border-color: var(--text-dim); }
.compare-selector-item.active-a { border-color: #3b82f6; }
.compare-selector-item.active-b { border-color: #f59e0b; }
.compare-selector-item img {
	width: 100%;
	aspect-ratio: 16 / 9;
	object-fit: cover;
	display: block;
}
.compare-selector-item .sel-label {
	font-size: 9px;
	text-align: center;
	padding: 0.15rem;
	color: var(--text-dim);
	white-space: nowrap;
	overflow: hidden;
	text-overflow: ellipsis;
}

.compare-btn {
	padding: 0.3rem 0.6rem;
	font-size: 11px;
}

/* ===== Folder Browser ===== */
.folder-overlay {
	position: fixed;
	inset: 0;
	z-index: 500;
	background: rgba(0, 0, 0, 0.5);
}
.folder-browser {
	position: fixed;
	top: 50%;
	left: 50%;
	transform: translate(-50%, -50%);
	z-index: 501;
	width: 90%;
	max-width: 600px;
	max-height: 70vh;
	background: var(--bg-surface);
	border: 1px solid var(--border-default);
	border-radius: 10px;
	box-shadow: var(--shadow-lg);
	display: flex;
	flex-direction: column;
	overflow: hidden;
}
.folder-header {
	display: flex;
	align-items: center;
	justify-content: space-between;
	padding: 0.75rem 1rem;
	border-bottom: 1px solid var(--border-subtle);
}
.folder-header h3 { font-size: 14px; font-weight: 600; margin: 0; }
.folder-path-bar {
	display: flex;
	gap: 0.4rem;
	padding: 0.5rem 1rem;
	border-bottom: 1px solid var(--border-subtle);
}
.folder-path-bar input { flex: 1; }
.folder-path-bar button { padding: 0.3rem 0.6rem; font-size: 12px; }
.folder-error {
	padding: 0.4rem 1rem;
	font-size: 12px;
	color: var(--accent-danger-text);
	background: var(--accent-error-bg);
}
.folder-list {
	flex: 1;
	overflow-y: auto;
	min-height: 200px;
	max-height: 400px;
}
.folder-item {
	display: flex;
	align-items: center;
	gap: 0.5rem;
	padding: 0.4rem 1rem;
	cursor: pointer;
	font-size: 13px;
	transition: background 0.1s;
}
.folder-item:hover { background: var(--bg-hover); }
.folder-icon { font-size: 16px; flex-shrink: 0; }
.folder-empty {
	padding: 2rem 1rem;
	text-align: center;
	color: var(--text-dim);
	font-size: 13px;
}
.folder-footer {
	display: flex;
	align-items: center;
	gap: 0.5rem;
	padding: 0.6rem 1rem;
	border-top: 1px solid var(--border-subtle);
}
.folder-selected {
	flex: 1;
	font-size: 12px;
	color: var(--text-dim);
	white-space: nowrap;
	overflow: hidden;
	text-overflow: ellipsis;
}
.browse-btn {
	padding: 0.3rem 0.6rem;
	font-size: 12px;
}

/* ===== Login Page ===== */
.login-container {
	display: flex;
	align-items: center;
	justify-content: center;
	min-height: 100vh;
	background: var(--bg-body);
	padding: 1rem;
}
.login-card {
	background: var(--bg-surface);
	border: 1px solid var(--border-default);
	border-radius: 12px;
	padding: 2.5rem 2rem;
	max-width: 420px;
	width: 100%;
	box-shadow: var(--shadow-lg);
}
.login-card h1 {
	margin: 0 0 0.5rem;
	font-size: 1.5rem;
	text-align: center;
	color: var(--text-primary);
}
.login-hint {
	text-align: center;
	color: var(--text-muted);
	font-size: 0.85rem;
	line-height: 1.5;
	margin-bottom: 1.5rem;
}
.login-hint code {
	background: var(--bg-input);
	padding: 0.15rem 0.4rem;
	border-radius: 4px;
	font-size: 0.85rem;
	color: var(--text-link);
}
.login-field {
	margin-bottom: 1rem;
}
.login-field label {
	display: block;
	margin-bottom: 0.35rem;
	color: var(--text-secondary);
	font-size: 0.9rem;
}
.login-field input {
	width: 100%;
	padding: 0.6rem 0.75rem;
	border: 1px solid var(--border-input);
	border-radius: 6px;
	background: var(--bg-input);
	color: var(--text-primary);
	font-size: 1rem;
	box-sizing: border-box;
}
.login-field input:focus {
	outline: none;
	border-color: var(--accent-primary);
}
.login-options {
	margin-bottom: 1rem;
}
.checkbox-label {
	display: flex;
	align-items: center;
	gap: 0.5rem;
	color: var(--text-muted);
	font-size: 0.85rem;
	cursor: pointer;
}
.login-error {
	color: var(--accent-danger-text);
	background: var(--accent-error-bg);
	border: 1px solid var(--accent-error-border);
	border-radius: 6px;
	padding: 0.5rem 0.75rem;
	font-size: 0.85rem;
	margin-bottom: 1rem;
}
.login-btn {
	width: 100%;
	padding: 0.65rem;
	font-size: 1rem;
}