/**
 * KRP Animations
 *
 * Transitions, hover effects, scroll reveals, loading states,
 * and decorative animations.
 *
 * @package KRP
 */

/* ==========================================================================
   Keyframes
   ========================================================================== */

/* Fade In */
@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

/* Fade In Up (for scroll-reveal) */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(1.5rem);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Fade In Down */
@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-1rem);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Slide In from Right (mobile menu) */
@keyframes slideInRight {
    from {
        transform: translateX(100%);
    }
    to {
        transform: translateX(0);
    }
}

/* Slide In from Bottom (bottom sheet) */
@keyframes slideInUp {
    from {
        transform: translateY(100%);
    }
    to {
        transform: translateY(0);
    }
}

/* Scale In (modal, popups) */
@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.95);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

/* Pulse (attention, notifications) */
@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.6;
    }
}

/* Spin (loading spinner) */
@keyframes spin {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

/* Float (hero decorative elements) */
@keyframes float {
    0%, 100% {
        transform: translateY(0) rotate(0deg);
    }
    25% {
        transform: translateY(-1rem) rotate(2deg);
    }
    50% {
        transform: translateY(-0.5rem) rotate(-1deg);
    }
    75% {
        transform: translateY(-1.5rem) rotate(1deg);
    }
}

/* Gentle Float (slower, more subtle) */
@keyframes floatGentle {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-0.75rem);
    }
}

/* Hero Part Float — gentle up/down with subtle rotation */
@keyframes heroFloat {
    0%, 100% {
        transform: translateY(0) rotate(-3deg);
    }
    50% {
        transform: translateY(-12px) rotate(3deg);
    }
}

/* Shimmer (loading placeholder) */
@keyframes shimmer {
    0% {
        background-position: -200% 0;
    }
    100% {
        background-position: 200% 0;
    }
}

/* Progress Bar Fill */
@keyframes progressFill {
    from {
        width: 0;
    }
}

/* Bounce (cart badge) */
@keyframes bounceIn {
    0% {
        transform: scale(0);
    }
    50% {
        transform: scale(1.25);
    }
    100% {
        transform: scale(1);
    }
}

/* Footer CTA — connector parts arcing into shopping bag */
@keyframes arcFromLeft {
    0% {
        transform: translate(0, 0) rotate(12deg);
        opacity: 1;
    }
    50% {
        transform: translate(20px, 20px) rotate(120deg);
        opacity: 1;
    }
    70% {
        transform: translate(28px, 38px) rotate(180deg);
        opacity: 1;
    }
    85% {
        transform: translate(32px, 44px) rotate(200deg);
        opacity: 0.5;
    }
    100% {
        transform: translate(34px, 48px) rotate(210deg);
        opacity: 0;
    }
}

@keyframes arcFromRight {
    0% {
        transform: translate(0, 0) rotate(-6deg);
        opacity: 1;
    }
    50% {
        transform: translate(-20px, 20px) rotate(-90deg);
        opacity: 1;
    }
    70% {
        transform: translate(-22px, 38px) rotate(-140deg);
        opacity: 1;
    }
    85% {
        transform: translate(-22px, 44px) rotate(-160deg);
        opacity: 0.5;
    }
    100% {
        transform: translate(-22px, 48px) rotate(-170deg);
        opacity: 0;
    }
}

@keyframes arcFromCenter {
    0% {
        transform: translateX(-50%) translateY(0) rotate(45deg);
        opacity: 1;
    }
    50% {
        transform: translateX(-50%) translateY(22px) rotate(180deg);
        opacity: 1;
    }
    70% {
        transform: translateX(-50%) translateY(38px) rotate(270deg);
        opacity: 1;
    }
    85% {
        transform: translateX(-50%) translateY(44px) rotate(315deg);
        opacity: 0.5;
    }
    100% {
        transform: translateX(-50%) translateY(48px) rotate(360deg);
        opacity: 0;
    }
}

/* ==========================================================================
   Animation Classes
   ========================================================================== */

/* Scroll Reveal (applied via JS IntersectionObserver) */
.reveal {
    opacity: 0;
    transform: translateY(1.5rem);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Staggered children reveal */
.reveal-stagger > * {
    opacity: 0;
    transform: translateY(1rem);
    transition: opacity 0.4s ease, transform 0.4s ease;
}

.reveal-stagger.visible > *:nth-child(1) { transition-delay: 0ms; }
.reveal-stagger.visible > *:nth-child(2) { transition-delay: 80ms; }
.reveal-stagger.visible > *:nth-child(3) { transition-delay: 160ms; }
.reveal-stagger.visible > *:nth-child(4) { transition-delay: 240ms; }
.reveal-stagger.visible > *:nth-child(5) { transition-delay: 320ms; }
.reveal-stagger.visible > *:nth-child(6) { transition-delay: 400ms; }
.reveal-stagger.visible > *:nth-child(7) { transition-delay: 480ms; }
.reveal-stagger.visible > *:nth-child(8) { transition-delay: 560ms; }

.reveal-stagger.visible > * {
    opacity: 1;
    transform: translateY(0);
}

/* Fade In */
.animate-fadeIn {
    animation: fadeIn 0.3s ease;
}

.animate-fadeInUp {
    animation: fadeInUp 0.4s ease;
}

.animate-fadeInDown {
    animation: fadeInDown 0.3s ease;
}

/* Slide Animations */
.animate-slideInRight {
    animation: slideInRight var(--transition-slow);
}

.animate-slideInUp {
    animation: slideInUp var(--transition-slow);
}

/* Scale */
.animate-scaleIn {
    animation: scaleIn 0.2s ease;
}

/* Loading States */
.animate-pulse {
    animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

.animate-spin {
    animation: spin 1s linear infinite;
}

/* Float for hero decorative parts */
.animate-float {
    animation: float 6s ease-in-out infinite;
}

.animate-float-slow {
    animation: floatGentle 8s ease-in-out infinite;
}

.animate-float-delay-1 {
    animation-delay: 1s;
}

.animate-float-delay-2 {
    animation-delay: 2s;
}

.animate-float-delay-3 {
    animation-delay: 3s;
}

/* Cart badge bounce */
.animate-bounce-in {
    animation: bounceIn 0.3s ease;
}

/* ==========================================================================
   Loading Skeleton / Shimmer
   ========================================================================== */
.skeleton {
    background: linear-gradient(
        90deg,
        var(--color-slate-100) 25%,
        var(--color-slate-200) 50%,
        var(--color-slate-100) 75%
    );
    background-size: 200% 100%;
    animation: shimmer 1.5s ease-in-out infinite;
    border-radius: var(--radius-md);
}

.skeleton-text {
    height: 1rem;
    margin-bottom: var(--space-2);
}

.skeleton-text:last-child {
    width: 60%;
}

.skeleton-heading {
    height: 1.5rem;
    width: 70%;
    margin-bottom: var(--space-4);
}

.skeleton-image {
    aspect-ratio: 1;
    width: 100%;
}

.skeleton-card {
    border-radius: var(--radius-xl);
    overflow: hidden;
}

/* ==========================================================================
   Loading Spinner
   ========================================================================== */
.spinner {
    display: inline-block;
    width: 1.25rem;
    height: 1.25rem;
    border: 2px solid var(--color-border);
    border-top-color: var(--color-primary);
    border-radius: var(--radius-full);
    animation: spin 0.6s linear infinite;
}

.spinner-lg {
    width: 2.5rem;
    height: 2.5rem;
    border-width: 3px;
}

.spinner-sm {
    width: 0.875rem;
    height: 0.875rem;
}

/* Page Loading Overlay */
.page-loader {
    position: fixed;
    inset: 0;
    background-color: var(--color-background);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: var(--z-toast);
}

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

/* Image Zoom on Hover */
.hover-zoom {
    overflow: hidden;
}

.hover-zoom img {
    transition: transform var(--transition-slow);
}

.hover-zoom:hover img {
    transform: scale(1.08);
}

/* Lift on Hover */
.hover-lift {
    transition: transform var(--transition-slow), box-shadow var(--transition-slow);
}

.hover-lift:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

/* Glow on Hover (primary) */
.hover-glow:hover {
    box-shadow: 0 0 0 4px rgba(249, 115, 22, 0.15);
}

/* ==========================================================================
   Reduced Motion
   ========================================================================== */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }

    .reveal {
        opacity: 1;
        transform: none;
    }

    .reveal-stagger > * {
        opacity: 1;
        transform: none;
        transition-delay: 0ms !important;
    }

    .floating-part {
        animation: none;
    }
}