/**
 * PapaGid Animations 2026
 * Scroll-triggered, milestones, micro-interactions
 *
 * @package Papagid
 * @since 2.0.0
 */

/* =============================================================================
   Scroll-Triggered Animations (Intersection Observer)
   ========================================================================== */

.feed-item,
.tool-card,
.expandable-card,
.content-card {
	opacity: 0;
	transform: translateY(30px);
	transition: opacity 0.5s ease,
	            transform 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.feed-item.is-visible,
.tool-card.is-visible,
.expandable-card.is-visible,
.content-card.is-visible {
	opacity: 1;
	transform: translateY(0);
}

/* Staggered delays for sequential appearance */
.feed-item:nth-child(2).is-visible { transition-delay: 0.1s; }
.feed-item:nth-child(3).is-visible { transition-delay: 0.2s; }
.feed-item:nth-child(4).is-visible { transition-delay: 0.3s; }
.feed-item:nth-child(5).is-visible { transition-delay: 0.4s; }

/* =============================================================================
   Milestone Celebration Animation (weeks 13, 27, 40)
   ========================================================================== */

@keyframes celebration {
	0% { transform: scale(1); }
	25% { transform: scale(1.1) rotate(-5deg); }
	50% { transform: scale(1.1) rotate(5deg); }
	75% { transform: scale(1.1) rotate(-5deg); }
	100% { transform: scale(1); }
}

.dashboard-week-card.milestone-celebration {
	animation: celebration 0.6s ease-in-out;
}

/* Confetti particles */
@keyframes confetti {
	0% {
		opacity: 1;
		transform: translateY(0) rotate(0deg);
	}
	100% {
		opacity: 0;
		transform: translateY(-100px) rotate(360deg);
	}
}

.confetti-particle {
	position: absolute;
	width: 8px;
	height: 8px;
	border-radius: 50%;
	animation: confetti 1.5s ease-out forwards;
	pointer-events: none;
}

/* =============================================================================
   Button Micro-Interactions (hover, active, ripple)
   ========================================================================== */

.button,
.btn-primary,
.btn-secondary,
.quick-action-card {
	position: relative;
	overflow: hidden;
	transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.button:hover,
.btn-primary:hover,
.btn-secondary:hover,
.quick-action-card:hover {
	transform: translateY(-2px);
	box-shadow:
		0 8px 24px rgba(37, 99, 235, 0.3),
		0 0 0 2px rgba(37, 99, 235, 0.1);
}

.button:active,
.btn-primary:active,
.btn-secondary:active {
	transform: translateY(0);
	transition-duration: 0.1s;
}

/* Ripple effect */
.button::after,
.btn-primary::after,
.btn-secondary::after {
	content: '';
	position: absolute;
	inset: 0;
	background: radial-gradient(circle,
		rgba(255, 255, 255, 0.3) 0%,
		transparent 70%);
	transform: scale(0);
	transition: transform 0.5s ease-out;
	pointer-events: none;
}

.button:active::after,
.btn-primary:active::after,
.btn-secondary:active::after {
	transform: scale(2);
	transition-duration: 0s;
}

/* =============================================================================
   Card Hover Effects
   ========================================================================== */

.feed-item,
.article-card,
.tool-card {
	transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.feed-item:hover,
.article-card:hover,
.tool-card:hover {
	transform: translateY(-4px);
	box-shadow:
		0 12px 32px rgba(0, 0, 0, 0.12),
		0 0 0 1px rgba(37, 99, 235, 0.08);
}

/* =============================================================================
   Shimmer Effect (для progress bars)
   ========================================================================== */

@keyframes shimmer {
	0% { transform: translateX(-100%); }
	100% { transform: translateX(100%); }
}

.progress-bar::after,
.shimmer::after {
	content: '';
	position: absolute;
	inset: 0;
	background: linear-gradient(90deg,
		transparent 0%,
		rgba(255, 255, 255, 0.3) 50%,
		transparent 100%);
	animation: shimmer 2s infinite;
}

/* =============================================================================
   Float Animation (для baby size emoji)
   ========================================================================== */

@keyframes floatEmoji {
	0%, 100% {
		transform: translateY(0) scale(1);
	}
	50% {
		transform: translateY(-8px) scale(1.05);
	}
}

.baby-size-card__emoji {
	animation: floatEmoji 4s ease-in-out infinite;
	filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.1));
}

/* =============================================================================
   Gradient Shift (для kinetic typography - уже в custom.css, дублируем здесь)
   ========================================================================== */

@keyframes gradientShift {
	0%, 100% { background-position: 0% 50%; }
	50% { background-position: 100% 50%; }
}

/* =============================================================================
   Pulse Animation (для badges и notifications)
   ========================================================================== */

@keyframes pulse {
	0%, 100% {
		opacity: 1;
		transform: scale(1);
	}
	50% {
		opacity: 0.8;
		transform: scale(1.05);
	}
}

.badge--pulse,
.notification-dot {
	animation: pulse 2s ease-in-out infinite;
}

/* =============================================================================
   Skeleton Loading (для placeholder content)
   ========================================================================== */

@keyframes skeleton-loading {
	0% {
		background-position: -200% 0;
	}
	100% {
		background-position: 200% 0;
	}
}

.skeleton {
	background: linear-gradient(
		90deg,
		#f3f4f6 0%,
		#e5e7eb 50%,
		#f3f4f6 100%
	);
	background-size: 200% 100%;
	animation: skeleton-loading 1.5s ease-in-out infinite;
	border-radius: var(--border-radius-md);
}

/* =============================================================================
   Feed Filter Tabs
   ========================================================================== */

.feed-filters {
	margin-bottom: var(--spacing-2xl);
}

.feed-filters__container {
	display: flex;
	gap: var(--spacing-sm);
	overflow-x: auto;
	scrollbar-width: thin;
	scrollbar-color: var(--color-border) transparent;
	padding-bottom: var(--spacing-xs);
}

.feed-filters__container::-webkit-scrollbar {
	height: 4px;
}

.feed-filters__container::-webkit-scrollbar-thumb {
	background: var(--color-border);
	border-radius: 2px;
}

.feed-filter-btn {
	display: inline-flex;
	align-items: center;
	gap: var(--spacing-xs);
	padding: var(--spacing-sm) var(--spacing-lg);
	background: var(--color-bg-primary);
	border: 1px solid var(--color-border);
	border-radius: var(--border-radius-lg);
	color: var(--color-text);
	font-size: 15px;
	font-weight: 500;
	cursor: pointer;
	transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
	white-space: nowrap;
}

.feed-filter-btn:hover {
	background: var(--color-bg-secondary);
	border-color: var(--color-primary);
	color: var(--color-primary);
	transform: translateY(-2px);
	box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.feed-filter-btn.is-active {
	background: var(--color-primary);
	border-color: var(--color-primary);
	color: #fff;
	box-shadow:
		0 4px 12px rgba(37, 99, 235, 0.3),
		0 0 0 2px rgba(37, 99, 235, 0.1);
}

.feed-filter-btn.is-active:hover {
	background: var(--color-primary-dark);
	transform: translateY(-2px);
}

.feed-filter-btn__icon {
	font-size: 18px;
	line-height: 1;
}

.feed-filter-btn__label {
	font-weight: 600;
}

/* Feed Item Filtering Animation */
.feed-item--filtering {
	opacity: 0.3;
	transform: scale(0.98);
	transition: all 0.3s ease;
}

/* Mobile responsive */
@media (max-width: 768px) {
	.feed-filters {
		margin-bottom: var(--spacing-lg);
	}

	.feed-filter-btn {
		padding: var(--spacing-xs) var(--spacing-md);
		font-size: 14px;
	}

	.feed-filter-btn__icon {
		font-size: 16px;
	}
}

/* =============================================================================
   Empty State Component
   ========================================================================== */

@keyframes fadeInUp {
	0% {
		opacity: 0;
		transform: translateY(30px);
	}
	100% {
		opacity: 1;
		transform: translateY(0);
	}
}

.empty-state {
	display: flex;
	align-items: center;
	justify-content: center;
	min-height: 400px;
	padding: var(--spacing-3xl) var(--spacing-lg);
	animation: fadeInUp 0.6s ease-out;
}

.empty-state__container {
	max-width: 600px;
	text-align: center;
}

.empty-state__icon {
	font-size: 80px;
	line-height: 1;
	margin-bottom: var(--spacing-xl);
	filter: grayscale(0.2);
	animation: floatEmoji 4s ease-in-out infinite;
}

.empty-state__title {
	font-size: var(--font-size-3xl);
	font-weight: 700;
	color: var(--color-text-primary);
	margin: 0 0 var(--spacing-md) 0;
	line-height: 1.2;
}

.empty-state__message {
	font-size: var(--font-size-lg);
	color: var(--color-text-secondary);
	margin: 0 0 var(--spacing-2xl) 0;
	line-height: 1.6;
}

.empty-state__actions {
	margin-top: var(--spacing-2xl);
}

/* Quick Links Grid */
.empty-state__quick-links {
	margin-top: var(--spacing-xl);
}

.empty-state__links-title {
	font-size: var(--font-size-sm);
	font-weight: 600;
	color: var(--color-text-light);
	text-transform: uppercase;
	letter-spacing: 0.5px;
	margin: 0 0 var(--spacing-lg) 0;
}

.empty-state__links-grid {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
	gap: var(--spacing-md);
}

.empty-state__link {
	display: flex;
	flex-direction: column;
	align-items: center;
	gap: var(--spacing-sm);
	padding: var(--spacing-lg);
	background: var(--color-bg-primary);
	border: 1px solid var(--color-border);
	border-radius: var(--border-radius-lg);
	text-decoration: none;
	transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.empty-state__link:hover {
	transform: translateY(-4px);
	box-shadow:
		0 8px 24px rgba(0, 0, 0, 0.08),
		0 0 0 2px var(--color-primary-light);
	border-color: var(--color-primary);
}

.empty-state__link-icon {
	font-size: 32px;
	line-height: 1;
}

.empty-state__link-label {
	font-size: 14px;
	font-weight: 600;
	color: var(--color-text);
	text-align: center;
}

.empty-state__link:hover .empty-state__link-label {
	color: var(--color-primary);
}

/* Responsive */
@media (max-width: 768px) {
	.empty-state {
		min-height: 300px;
		padding: var(--spacing-2xl) var(--spacing-md);
	}

	.empty-state__icon {
		font-size: 64px;
	}

	.empty-state__title {
		font-size: var(--font-size-2xl);
	}

	.empty-state__message {
		font-size: var(--font-size-base);
	}

	.empty-state__links-grid {
		grid-template-columns: repeat(2, 1fr);
		gap: var(--spacing-sm);
	}

	.empty-state__link {
		padding: var(--spacing-md);
	}

	.empty-state__link-icon {
		font-size: 28px;
	}

	.empty-state__link-label {
		font-size: 13px;
	}
}

/* =============================================================================
   Global Search Overlay
   ========================================================================== */

.search-overlay {
	position: fixed;
	inset: 0;
	background: rgba(0, 0, 0, 0.6);
	backdrop-filter: blur(4px);
	z-index: 9999;
	display: flex;
	align-items: flex-start;
	justify-content: center;
	padding: calc(var(--header-height) + var(--spacing-2xl)) var(--spacing-lg) var(--spacing-2xl);
	opacity: 0;
	pointer-events: none;
	transition: opacity 0.3s ease;
}

.search-overlay.is-active {
	opacity: 1;
	pointer-events: all;
}

.search-overlay__container {
	max-width: 600px;
	width: 100%;
	background: var(--color-bg-primary);
	border-radius: var(--border-radius-lg);
	box-shadow:
		0 24px 48px rgba(0, 0, 0, 0.2),
		0 0 0 1px rgba(0, 0, 0, 0.05);
	max-height: 70vh;
	display: flex;
	flex-direction: column;
	transform: translateY(-20px);
	transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.search-overlay.is-active .search-overlay__container {
	transform: translateY(0);
}

.search-overlay__header {
	display: flex;
	align-items: center;
	gap: var(--spacing-md);
	padding: var(--spacing-lg);
	border-bottom: 1px solid var(--color-border);
}

.search-overlay__input {
	flex: 1;
	border: none;
	background: none;
	font-size: 18px;
	color: var(--color-text);
	outline: none;
	font-family: inherit;
}

.search-overlay__input::placeholder {
	color: var(--color-text-light);
}

.search-overlay__close {
	display: flex;
	align-items: center;
	justify-content: center;
	width: 36px;
	height: 36px;
	border: none;
	background: var(--color-bg-secondary);
	border-radius: var(--border-radius-md);
	color: var(--color-text);
	cursor: pointer;
	transition: all 0.2s;
}

.search-overlay__close:hover {
	background: var(--color-bg-tertiary);
	transform: scale(1.05);
}

.search-overlay__results {
	overflow-y: auto;
	max-height: calc(70vh - 80px);
	padding: var(--spacing-lg);
}

.search-overlay__hint,
.search-overlay__empty,
.search-overlay__error {
	text-align: center;
	padding: var(--spacing-2xl);
	color: var(--color-text-light);
}

.search-overlay__loading {
	padding: var(--spacing-md);
}

/* Search Results */
.search-results-list {
	display: flex;
	flex-direction: column;
	gap: var(--spacing-sm);
}

.search-result-item {
	display: block;
	padding: var(--spacing-md);
	background: var(--color-bg-secondary);
	border-radius: var(--border-radius-md);
	text-decoration: none;
	transition: all 0.2s;
}

.search-result-item:hover {
	background: var(--color-bg-tertiary);
	transform: translateX(4px);
	box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.search-result-item__type {
	font-size: 12px;
	font-weight: 600;
	color: var(--color-primary);
	text-transform: uppercase;
	letter-spacing: 0.5px;
	margin-bottom: var(--spacing-xs);
}

.search-result-item__title {
	font-size: 16px;
	font-weight: 600;
	color: var(--color-text);
	margin: 0 0 var(--spacing-xs) 0;
	line-height: 1.4;
}

.search-result-item__excerpt {
	font-size: 14px;
	color: var(--color-text-secondary);
	margin: 0;
	line-height: 1.5;
}

.search-result-item mark {
	background: rgba(37, 99, 235, 0.15);
	color: var(--color-primary);
	padding: 0 2px;
	border-radius: 2px;
	font-weight: 600;
}

/* Lock body scroll when search overlay is open */
body.search-overlay-open {
	overflow: hidden;
}

/* Mobile responsive */
@media (max-width: 768px) {
	.search-overlay {
		padding: calc(var(--header-height) + var(--spacing-md)) var(--spacing-md) var(--spacing-md);
	}

	.search-overlay__container {
		max-height: 80vh;
	}

	.search-overlay__input {
		font-size: 16px;
	}

	.search-overlay__results {
		max-height: calc(80vh - 80px);
	}

	.search-result-item__title {
		font-size: 15px;
	}

	.search-result-item__excerpt {
		font-size: 13px;
	}
}

/* =============================================================================
   Reduced Motion Support (accessibility)
   ========================================================================== */

@media (prefers-reduced-motion: reduce) {
	*,
	*::before,
	*::after {
		animation-duration: 0.01ms !important;
		animation-iteration-count: 1 !important;
		transition-duration: 0.01ms !important;
	}

	/* Keep scroll-triggered visibility but remove motion */
	.feed-item,
	.tool-card,
	.expandable-card,
	.content-card {
		transform: none;
	}
}


/* =============================================================================
   Accessibility - Focus Indicators & Skip Links
   ========================================================================== */

/* Skip to content link */
.skip-to-content {
	position: absolute;
	top: -100px;
	left: var(--spacing-md);
	z-index: 10000;
	padding: var(--spacing-sm) var(--spacing-lg);
	background: var(--color-primary);
	color: #fff;
	font-weight: 600;
	text-decoration: none;
	border-radius: var(--border-radius-md);
	box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
	transition: top 0.3s ease;
}

.skip-to-content:focus {
	top: var(--spacing-md);
}

/* Enhanced focus indicators */
a:focus,
button:focus,
input:focus,
select:focus,
textarea:focus,
[tabindex]:focus {
	outline: 3px solid var(--color-primary);
	outline-offset: 2px;
	border-radius: 4px;
}

.feed-item:focus-within {
	outline: 3px solid var(--color-primary);
	outline-offset: 4px;
}

.sidebar-nav__item:focus {
	outline: 3px solid var(--color-primary);
	outline-offset: 2px;
}

/* High contrast focus for buttons */
.btn-primary:focus,
.btn-secondary:focus,
.btn-my-week:focus {
	outline: 3px solid #fff;
	outline-offset: 2px;
	box-shadow:
		0 0 0 5px var(--color-primary-dark),
		0 8px 24px rgba(0, 0, 0, 0.3);
}

/* Keyboard-only focus (not mouse clicks) */
*:focus:not(:focus-visible) {
	outline: none;
}

*:focus-visible {
	outline: 3px solid var(--color-primary);
	outline-offset: 2px;
}

/* =============================================================================
   High Contrast Mode Support
   ========================================================================== */

@media (prefers-contrast: high) {
	:root {
		--color-border: #000;
		--color-text-light: #333;
	}

	.feed-item,
	.tool-card,
	.button {
		border-width: 2px;
	}

	*:focus,
	*:focus-visible {
		outline-width: 4px;
		outline-offset: 3px;
	}
}