/**
 * TikTok Downloader Core - Modern Two-Tone UI Stylesheet
 * (Deep Navy Hero + Crisp White/Slate Cards & Clean Typography)
 */

:root {
	--tt-bg-body: #f8fafc;
	--tt-bg-card: #ffffff;
	--tt-bg-input: #ffffff;
	--tt-bg-subtle: #f1f5f9;
	
	--tt-border: #e2e8f0;
	--tt-border-focus: #0284c7;
	
	--tt-primary: #fe2c55;
	--tt-primary-hover: #e02447;
	--tt-cyan: #0284c7;
	--tt-cyan-light: #e0f2fe;
	--tt-audio: #7c3aed;
	
	--tt-text-main: #0f172a;
	--tt-text-muted: #64748b;
	--tt-text-dim: #94a3b8;
	
	--tt-radius-sm: 8px;
	--tt-radius-md: 12px;
	--tt-radius-lg: 18px;
	--tt-radius-full: 9999px;
	
	--tt-shadow-card: 0 4px 20px -2px rgba(0, 0, 0, 0.07);
	--tt-shadow-hover: 0 10px 30px -4px rgba(0, 0, 0, 0.12);
	--tt-transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Base resets */
.tt-app-container * {
	box-sizing: border-box;
}

.tt-app-container {
	max-width: 920px;
	margin: 0 auto;
	padding: 0 20px 60px;
	color: var(--tt-text-main);
	font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

/* Hero Section (Tone 1 Header Banner) */
.tt-hero-header {
	text-align: center;
	margin-bottom: 24px;
	padding-top: 20px;
}

.tt-badge-pill {
	display: inline-flex;
	align-items: center;
	gap: 6px;
	background: rgba(2, 132, 199, 0.1);
	color: #0284c7;
	border: 1px solid rgba(2, 132, 199, 0.25);
	padding: 6px 14px;
	border-radius: var(--tt-radius-full);
	font-size: 13px;
	font-weight: 600;
	margin-bottom: 14px;
}

.tt-hero-title {
	font-size: clamp(26px, 4.5vw, 40px);
	font-weight: 800;
	line-height: 1.25;
	margin: 0 0 12px;
	color: #0f172a;
	letter-spacing: -0.5px;
}

.tt-hero-subtitle {
	font-size: clamp(14px, 2vw, 16px);
	color: var(--tt-text-muted);
	max-width: 680px;
	margin: 0 auto;
	line-height: 1.6;
}

/* Tool Main Card (Crisp White with Soft Elevation) */
.tt-main-card {
	background: var(--tt-bg-card);
	border: 1px solid var(--tt-border);
	border-radius: var(--tt-radius-lg);
	box-shadow: var(--tt-shadow-card);
	padding: 24px;
	margin-bottom: 30px;
	position: relative;
}

/* Navigation Tabs */
.tt-tabs-header {
	display: flex;
	background: var(--tt-bg-subtle);
	border: 1px solid var(--tt-border);
	border-radius: var(--tt-radius-md);
	padding: 4px;
	margin-bottom: 20px;
	gap: 4px;
}

.tt-tab-btn {
	flex: 1;
	display: flex;
	align-items: center;
	justify-content: center;
	gap: 8px;
	background: transparent;
	border: none;
	color: var(--tt-text-muted);
	padding: 10px 14px;
	border-radius: 8px;
	font-size: 14px;
	font-weight: 600;
	cursor: pointer;
	transition: var(--tt-transition);
}

.tt-tab-btn:hover {
	color: var(--tt-text-main);
	background: rgba(0, 0, 0, 0.04);
}

.tt-tab-btn.active {
	background: #ffffff;
	color: #0f172a;
	font-weight: 700;
	box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

/* Tab Panels */
.tt-tab-panel {
	display: none;
}

.tt-tab-panel.active {
	display: block;
}

/* Input Form Controls */
.tt-input-group {
	position: relative;
	display: flex;
	align-items: center;
	background: var(--tt-bg-input);
	border: 2px solid var(--tt-border);
	border-radius: var(--tt-radius-md);
	transition: var(--tt-transition);
	margin-bottom: 14px;
}

.tt-input-group:focus-within {
	border-color: var(--tt-border-focus);
	box-shadow: 0 0 0 3px rgba(2, 132, 199, 0.15);
}

.tt-input-icon {
	padding-left: 16px;
	font-size: 18px;
	color: var(--tt-text-muted);
}

.tt-input-field {
	flex: 1;
	background: transparent;
	border: none;
	padding: 16px 12px;
	color: var(--tt-text-main);
	font-size: 15px;
	outline: none;
	width: 100%;
}

.tt-input-field::placeholder {
	color: var(--tt-text-dim);
}

.tt-input-actions {
	display: flex;
	align-items: center;
	gap: 6px;
	padding-right: 8px;
}

.tt-btn-paste, .tt-btn-clear {
	background: #f1f5f9;
	border: 1px solid #cbd5e1;
	color: #334155;
	padding: 6px 12px;
	border-radius: var(--tt-radius-sm);
	font-size: 12px;
	font-weight: 600;
	cursor: pointer;
	transition: var(--tt-transition);
}

.tt-btn-paste:hover, .tt-btn-clear:hover {
	color: #0f172a;
	background: #e2e8f0;
}

/* Textarea for Batch Mode */
.tt-textarea-field {
	width: 100%;
	min-height: 120px;
	background: var(--tt-bg-input);
	border: 2px solid var(--tt-border);
	border-radius: var(--tt-radius-md);
	padding: 14px;
	color: var(--tt-text-main);
	font-size: 14px;
	font-family: inherit;
	resize: vertical;
	outline: none;
	transition: var(--tt-transition);
	margin-bottom: 14px;
}

.tt-textarea-field:focus {
	border-color: var(--tt-border-focus);
	box-shadow: 0 0 0 3px rgba(2, 132, 199, 0.15);
}

/* Submit Buttons */
.tt-btn-submit {
	width: 100%;
	background: linear-gradient(135deg, var(--tt-primary) 0%, #e02447 100%);
	border: none;
	color: #ffffff;
	padding: 15px 24px;
	border-radius: var(--tt-radius-md);
	font-size: 16px;
	font-weight: 700;
	cursor: pointer;
	transition: var(--tt-transition);
	display: flex;
	align-items: center;
	justify-content: center;
	gap: 10px;
	box-shadow: 0 4px 14px rgba(254, 44, 85, 0.3);
}

.tt-btn-submit:hover {
	background: var(--tt-primary-hover);
	box-shadow: 0 6px 20px rgba(254, 44, 85, 0.4);
	transform: translateY(-1px);
}

.tt-btn-submit:disabled {
	opacity: 0.65;
	cursor: not-allowed;
	transform: none;
}

.tt-batch-submit-btn {
	background: linear-gradient(135deg, #0284c7 0%, #0369a1 100%);
	color: #ffffff;
	box-shadow: 0 4px 14px rgba(2, 132, 199, 0.3);
}

.tt-batch-submit-btn:hover {
	background: #0284c7;
}

/* Result Cards */
.tt-result-card {
	margin-top: 24px;
	background: #f8fafc;
	border: 1px solid var(--tt-border);
	border-radius: var(--tt-radius-md);
	padding: 20px;
}

.tt-result-grid {
	display: grid;
	grid-template-columns: 240px 1fr;
	gap: 20px;
}

@media (max-width: 680px) {
	.tt-result-grid {
		grid-template-columns: 1fr;
	}
}

/* Media Frame */
.tt-preview-col {
	display: flex;
	flex-direction: column;
	gap: 12px;
}

.tt-media-frame {
	position: relative;
	border-radius: var(--tt-radius-sm);
	overflow: hidden;
	background: #0f172a;
	aspect-ratio: 9 / 16;
	max-height: 380px;
	display: flex;
	align-items: center;
	justify-content: center;
	border: 1px solid var(--tt-border);
}

.tt-video-player, .tt-cover-img {
	width: 100%;
	height: 100%;
	object-fit: cover;
}

.tt-type-badge {
	position: absolute;
	top: 10px;
	left: 10px;
	background: rgba(15, 23, 42, 0.85);
	backdrop-filter: blur(8px);
	color: #ffffff;
	font-size: 11px;
	font-weight: 700;
	padding: 4px 8px;
	border-radius: 6px;
	border: 1px solid rgba(255, 255, 255, 0.15);
}

/* Audio Player Preview */
.tt-audio-preview {
	background: #ffffff;
	border: 1px solid var(--tt-border);
	border-radius: var(--tt-radius-sm);
	padding: 10px;
}

.tt-audio-info {
	display: flex;
	align-items: center;
	gap: 8px;
	font-size: 12px;
	color: var(--tt-cyan);
	margin-bottom: 6px;
	white-space: nowrap;
	overflow: hidden;
	text-overflow: ellipsis;
	font-weight: 600;
}

.tt-audio-player {
	width: 100%;
	height: 32px;
}

/* Details Column */
.tt-author-bar {
	display: flex;
	align-items: center;
	gap: 12px;
	margin-bottom: 12px;
}

.tt-avatar {
	width: 44px;
	height: 44px;
	border-radius: 50%;
	border: 2px solid #0284c7;
	object-fit: cover;
	background: #e2e8f0;
}

.tt-author-name {
	font-weight: 700;
	font-size: 15px;
	color: #0f172a;
}

.tt-author-handle {
	font-size: 13px;
	color: var(--tt-text-muted);
}

.tt-video-caption {
	font-size: 14px;
	line-height: 1.5;
	color: #334155;
	margin-bottom: 12px;
	word-break: break-word;
}

.tt-stats-row {
	display: flex;
	gap: 16px;
	font-size: 12px;
	color: var(--tt-text-muted);
	margin-bottom: 18px;
	padding-bottom: 12px;
	border-bottom: 1px solid var(--tt-border);
}

/* Action Buttons */
.tt-actions-container {
	display: flex;
	flex-direction: column;
	gap: 10px;
}

.tt-btn {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	gap: 8px;
	padding: 12px 18px;
	border-radius: var(--tt-radius-sm);
	font-size: 14px;
	font-weight: 700;
	text-decoration: none;
	cursor: pointer;
	border: none;
	transition: var(--tt-transition);
}

.tt-btn-primary {
	background: linear-gradient(135deg, var(--tt-primary), #e02447);
	color: #ffffff;
}

.tt-btn-primary:hover {
	background: var(--tt-primary-hover);
	transform: translateY(-1px);
}

.tt-btn-audio {
	background: linear-gradient(135deg, #7c3aed, #6d28d9);
	color: #ffffff;
}

.tt-btn-audio:hover {
	filter: brightness(1.1);
	transform: translateY(-1px);
}

.tt-btn-row {
	display: flex;
	gap: 8px;
	flex-wrap: wrap;
}

.tt-btn-secondary {
	background: #ffffff;
	border: 1px solid var(--tt-border);
	color: #334155;
	font-size: 12px;
	padding: 8px 14px;
	display: inline-flex;
	align-items: center;
	gap: 6px;
	border-radius: var(--tt-radius-sm);
}

.tt-btn-secondary:hover {
	background: #f1f5f9;
	color: #0f172a;
	border-color: #cbd5e1;
}

/* Slideshow Grid */
.tt-slides-grid-wrapper {
	margin-top: 20px;
	padding-top: 20px;
	border-top: 1px solid var(--tt-border);
}

.tt-slides-title {
	font-size: 16px;
	margin: 0 0 14px;
	color: #0f172a;
	font-weight: 700;
}

.tt-slides-grid {
	display: grid;
	grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
	gap: 12px;
}

.tt-slide-card {
	position: relative;
	background: #0f172a;
	border-radius: 8px;
	overflow: hidden;
	aspect-ratio: 9 / 16;
	border: 1px solid var(--tt-border);
}

.tt-slide-card img {
	width: 100%;
	height: 100%;
	object-fit: cover;
}

.tt-slide-actions {
	position: absolute;
	bottom: 0;
	left: 0;
	right: 0;
	background: linear-gradient(transparent, rgba(15,23,42,0.9));
	padding: 6px 8px;
	display: flex;
	justify-content: space-between;
	align-items: center;
	font-size: 12px;
	font-weight: 700;
	color: #fff;
}

.tt-slide-dl {
	text-decoration: none;
	background: #0284c7;
	color: #ffffff;
	border-radius: 4px;
	padding: 2px 6px;
	font-size: 11px;
}

/* Batch Header & Results */
.tt-batch-header-bar {
	display: flex;
	justify-content: space-between;
	align-items: center;
	background: #ffffff;
	border: 1px solid #bfdbfe;
	padding: 14px 18px;
	border-radius: var(--tt-radius-md);
	margin-top: 18px;
	flex-wrap: wrap;
	gap: 12px;
}

.tt-batch-count-info {
	color: #0f172a;
}

.tt-batch-header-actions {
	display: flex;
	gap: 10px;
	flex-wrap: wrap;
}

.tt-batch-cards-container {
	display: flex;
	flex-direction: column;
	gap: 10px;
	margin-top: 14px;
}

.tt-batch-item-card {
	display: flex;
	align-items: center;
	gap: 14px;
	background: #ffffff;
	border: 1px solid var(--tt-border);
	padding: 10px 14px;
	border-radius: var(--tt-radius-sm);
}

.tt-batch-thumb {
	width: 48px;
	height: 64px;
	border-radius: 6px;
	object-fit: cover;
	background: #0f172a;
}

.tt-batch-info {
	flex: 1;
	min-width: 0;
}

.tt-batch-title {
	font-size: 13.5px;
	font-weight: 600;
	color: #0f172a;
	white-space: nowrap;
	overflow: hidden;
	text-overflow: ellipsis;
}

.tt-batch-author {
	font-size: 12px;
	color: var(--tt-text-muted);
}

.tt-batch-btns {
	display: flex;
	gap: 6px;
}

.tt-btn-sm {
	padding: 6px 12px;
	font-size: 12px;
}

/* Local History Widget */
.tt-history-section {
	margin-top: 36px;
	background: #ffffff;
	border: 1px solid var(--tt-border);
	border-radius: var(--tt-radius-lg);
	padding: 20px 24px;
	box-shadow: var(--tt-shadow-card);
}

.tt-history-header {
	display: flex;
	justify-content: space-between;
	align-items: center;
	margin-bottom: 16px;
}

.tt-history-header h3 {
	margin: 0;
	font-size: 18px;
	color: #0f172a;
	display: flex;
	align-items: center;
	gap: 8px;
}

.tt-btn-clear-history {
	background: transparent;
	border: 1px solid rgba(254, 44, 85, 0.4);
	color: var(--tt-primary);
	padding: 4px 10px;
	border-radius: 6px;
	font-size: 12px;
	cursor: pointer;
	font-weight: 600;
}

.tt-btn-clear-history:hover {
	background: #fee2e2;
}

.tt-history-grid {
	display: grid;
	grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
	gap: 12px;
}

.tt-history-card {
	display: flex;
	gap: 10px;
	background: #f8fafc;
	border: 1px solid var(--tt-border);
	border-radius: var(--tt-radius-sm);
	padding: 8px;
	align-items: center;
}

.tt-history-thumb-wrap {
	position: relative;
	width: 44px;
	height: 60px;
	border-radius: 4px;
	overflow: hidden;
	flex-shrink: 0;
	background: #0f172a;
}

.tt-history-thumb {
	width: 100%;
	height: 100%;
	object-fit: cover;
}

.tt-history-badge {
	position: absolute;
	bottom: 2px;
	left: 2px;
	background: rgba(15,23,42,0.85);
	color: #fff;
	font-size: 8px;
	padding: 1px 3px;
	border-radius: 2px;
}

.tt-history-content {
	flex: 1;
	min-width: 0;
}

.tt-history-title {
	font-size: 12.5px;
	font-weight: 600;
	color: #0f172a;
	white-space: nowrap;
	overflow: hidden;
	text-overflow: ellipsis;
}

.tt-history-author {
	font-size: 11px;
	color: var(--tt-text-muted);
	margin-bottom: 4px;
}

.tt-history-actions {
	display: flex;
	gap: 4px;
}

.tt-btn-icon {
	background: #ffffff;
	border: 1px solid var(--tt-border);
	color: #334155;
	padding: 6px;
	border-radius: 4px;
	font-size: 11px;
	cursor: pointer;
	text-decoration: none;
	display: inline-flex;
	align-items: center;
	justify-content: center;
}

.tt-btn-icon:hover {
	background: #0284c7;
	color: #ffffff;
	border-color: #0284c7;
}

.tt-btn-icon.text-danger:hover {
	background: #fe2c55;
	color: #ffffff;
	border-color: #fe2c55;
}

/* Deep Semantic SEO Content Section */
.tt-seo-content-section {
	margin-top: 50px;
	line-height: 1.75;
}

.tt-seo-content-section h2 {
	font-size: 24px;
	color: #0f172a;
	margin: 36px 0 14px;
	font-weight: 800;
	border-bottom: 2px solid #e2e8f0;
	padding-bottom: 8px;
	letter-spacing: -0.3px;
}

.tt-seo-content-section p {
	margin-bottom: 16px;
	font-size: 14.5px;
	color: #475569;
}

.tt-device-grid {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
	gap: 16px;
	margin: 24px 0;
}

.tt-device-card {
	background: #ffffff;
	border: 1px solid var(--tt-border);
	border-radius: var(--tt-radius-md);
	padding: 22px;
	box-shadow: var(--tt-shadow-card);
}

.tt-device-card h4 {
	margin: 0 0 10px;
	font-size: 16px;
	color: #0f172a;
	font-weight: 700;
}

.tt-device-card p {
	font-size: 13.5px;
	line-height: 1.6;
	margin: 0;
	color: #64748b;
}

/* Features Grid */
.tt-features-section {
	margin-top: 40px;
}

.tt-section-title {
	text-align: center;
	font-size: 24px;
	font-weight: 800;
	color: #0f172a;
	margin-bottom: 24px;
	letter-spacing: -0.3px;
}

.tt-features-grid {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
	gap: 16px;
}

.tt-feature-card {
	background: #ffffff;
	border: 1px solid var(--tt-border);
	border-radius: var(--tt-radius-md);
	padding: 22px;
	box-shadow: var(--tt-shadow-card);
	transition: var(--tt-transition);
}

.tt-feature-card:hover {
	transform: translateY(-2px);
	box-shadow: var(--tt-shadow-hover);
	border-color: #cbd5e1;
}

.tt-feature-icon {
	font-size: 26px;
	margin-bottom: 10px;
}

.tt-feature-card h4 {
	margin: 0 0 8px;
	font-size: 16px;
	color: #0f172a;
	font-weight: 700;
}

.tt-feature-card p {
	margin: 0;
	font-size: 13.5px;
	color: #64748b;
	line-height: 1.55;
}

/* How-To Section */
.tt-howto-section {
	margin-top: 40px;
	background: #ffffff;
	border: 1px solid var(--tt-border);
	border-radius: var(--tt-radius-lg);
	padding: 32px;
	box-shadow: var(--tt-shadow-card);
}

.tt-howto-steps {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
	gap: 20px;
	margin-top: 20px;
}

.tt-step-item {
	display: flex;
	flex-direction: column;
	gap: 10px;
}

.tt-step-num {
	width: 34px;
	height: 34px;
	border-radius: 50%;
	background: #0284c7;
	color: #ffffff;
	font-weight: 800;
	display: flex;
	align-items: center;
	justify-content: center;
	font-size: 14px;
}

.tt-step-item h4 {
	margin: 0;
	font-size: 15px;
	color: #0f172a;
	font-weight: 700;
}

.tt-step-item p {
	margin: 0;
	font-size: 13.5px;
	color: #64748b;
	line-height: 1.5;
}

/* FAQ Accordion */
.tt-faq-section {
	margin-top: 40px;
}

.tt-faq-list {
	display: flex;
	flex-direction: column;
	gap: 10px;
}

.tt-faq-item {
	background: #ffffff;
	border: 1px solid var(--tt-border);
	border-radius: var(--tt-radius-md);
	overflow: hidden;
	box-shadow: 0 1px 3px rgba(0,0,0,0.04);
}

.tt-faq-question {
	padding: 16px 20px;
	font-size: 15px;
	font-weight: 700;
	color: #0f172a;
	cursor: pointer;
	display: flex;
	justify-content: space-between;
	align-items: center;
	user-select: none;
}

.tt-faq-question::after {
	content: '+';
	font-size: 20px;
	color: #0284c7;
	transition: var(--tt-transition);
}

.tt-faq-item.active .tt-faq-question::after {
	content: '−';
}

.tt-faq-answer {
	display: none;
	padding: 0 20px 18px;
	font-size: 14px;
	color: #475569;
	line-height: 1.65;
}

.tt-faq-item.active .tt-faq-answer {
	display: block;
}

/* Toast Container */
.tt-toast-container {
	position: fixed;
	bottom: 24px;
	right: 24px;
	z-index: 10000;
	display: flex;
	flex-direction: column;
	gap: 8px;
}

.tt-toast {
	display: flex;
	align-items: center;
	gap: 10px;
	background: #0f172a;
	border: 1px solid #334155;
	color: #ffffff;
	padding: 12px 18px;
	border-radius: var(--tt-radius-sm);
	box-shadow: 0 10px 30px rgba(0,0,0,0.3);
	font-size: 14px;
}

.tt-toast-success {
	border-left: 4px solid #10b981;
}

.tt-toast-error {
	border-left: 4px solid var(--tt-primary);
}

.tt-toast-info {
	border-left: 4px solid #0284c7;
}

/* Spinner */
.tt-spinner {
	display: inline-block;
	width: 16px;
	height: 16px;
	border: 2px solid rgba(255,255,255,0.3);
	border-radius: 50%;
	border-top-color: #fff;
	animation: tt-spin 0.8s linear infinite;
}

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

@keyframes tt-fade {
	from { opacity: 0; transform: translateY(8px); }
	to { opacity: 1; transform: translateY(0); }
}

.animate-fade-in {
	animation: tt-fade 0.3s ease-out;
}