/* ============================================================================
   UI/UX ENHANCEMENTS - Loading States, Animations & Responses
   ============================================================================ */

/* ============================================================================
   LOADING SPINNERS & STATES
   ============================================================================ */

/* Spinner Animation */
@keyframes spin {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

@keyframes shimmer {
    0% {
        background-position: -1000px 0;
    }
    100% {
        background-position: 1000px 0;
    }
}

/* Loading Spinner */
.spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(74, 124, 67, 0.2);
    border-radius: 50%;
    border-top-color: #4a7c43;
    animation: spin 0.8s linear infinite;
}

.spinner-lg {
    width: 40px;
    height: 40px;
    border-width: 4px;
}

.spinner-sm {
    width: 16px;
    height: 16px;
    border-width: 2px;
}

/* Loading Container */
.loading-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    padding: 2rem;
}

.loading-text {
    color: #666;
    font-size: 0.875rem;
    font-weight: 500;
}

/* Skeleton Loading */
.skeleton {
    background: linear-gradient(
        90deg,
        #f0f0f0 25%,
        #e0e0e0 50%,
        #f0f0f0 75%
    );
    background-size: 1000px 100%;
    animation: shimmer 2s infinite;
    border-radius: 0.5rem;
}

.dark .skeleton {
    background: linear-gradient(
        90deg,
        #333 25%,
        #444 50%,
        #333 75%
    );
    background-size: 1000px 100%;
}

.skeleton-text {
    height: 1rem;
    margin-bottom: 0.5rem;
}

.skeleton-avatar {
    width: 3rem;
    height: 3rem;
    border-radius: 50%;
}

.skeleton-card {
    border-radius: 1.5rem;
    height: 300px;
}

/* ============================================================================
   BUTTON STATES & INTERACTIONS
   ============================================================================ */

/* Button Loading State */
.btn-loading {
    position: relative;
    color: transparent;
}

.btn-loading::after {
    content: '';
    position: absolute;
    width: 16px;
    height: 16px;
    top: 50%;
    left: 50%;
    margin-left: -8px;
    margin-top: -8px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: #fff;
    animation: spin 0.8s linear infinite;
}

/* Button Disabled State */
button:disabled,
button[disabled] {
    opacity: 0.6;
    cursor: not-allowed;
}

/* Button Focus State */
button:focus-visible {
    outline: 2px solid #4a7c43;
    outline-offset: 2px;
}

/* ============================================================================
   FORM INTERACTIONS
   ============================================================================ */

/* Form Input Focus Enhancement */
input:focus,
select:focus,
textarea:focus {
    box-shadow: 0 0 0 3px rgba(74, 124, 67, 0.1);
}

.dark input:focus,
.dark select:focus,
.dark textarea:focus {
    box-shadow: 0 0 0 3px rgba(74, 124, 67, 0.2);
}

/* Input Error State */
input.error,
select.error,
textarea.error {
    border-color: #ef4444 !important;
    background-color: rgba(239, 68, 68, 0.05);
}

.dark input.error,
.dark select.error,
.dark textarea.error {
    background-color: rgba(239, 68, 68, 0.1);
}

/* Input Success State */
input.success,
select.success,
textarea.success {
    border-color: #10b981 !important;
    background-color: rgba(16, 185, 129, 0.05);
}

.dark input.success,
.dark select.success,
.dark textarea.success {
    background-color: rgba(16, 185, 129, 0.1);
}

/* Form Error Message */
.form-error {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    color: #ef4444;
    margin-top: 0.25rem;
    animation: slideInUp 0.3s ease-out;
}

.form-error::before {
    content: '⚠';
    flex-shrink: 0;
}

/* Form Success Message */
.form-success {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    color: #10b981;
    margin-top: 0.25rem;
    animation: slideInUp 0.3s ease-out;
}

.form-success::before {
    content: '✓';
    flex-shrink: 0;
}

/* ============================================================================
   TRANSITIONS & ANIMATIONS
   ============================================================================ */

/* Smooth Container Transitions */
.transition-container {
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

.fade-in {
    animation: fadeIn 0.3s ease-out forwards;
}

/* Fade In Up */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in-up {
    animation: fadeInUp 0.3s ease-out forwards;
}

/* Fade In Down */
@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in-down {
    animation: fadeInDown 0.3s ease-out forwards;
}

/* Slide In Up */
@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.slide-in-up {
    animation: slideInUp 0.2s ease-out forwards;
}

/* Slide In Down */
@keyframes slideInDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.slide-in-down {
    animation: slideInDown 0.2s ease-out forwards;
}

/* Slide In Left */
@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.slide-in-left {
    animation: slideInLeft 0.3s ease-out forwards;
}

/* Slide In Right */
@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.slide-in-right {
    animation: slideInRight 0.3s ease-out forwards;
}

/* ============================================================================
   PAGE TRANSITIONS
   ============================================================================ */

/* Page Load Animation */
@keyframes pageEnter {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.page-enter {
    animation: pageEnter 0.5s ease-out;
}

/* Page Exit Animation */
@keyframes pageExit {
    from {
        opacity: 1;
        transform: translateY(0);
    }
    to {
        opacity: 0;
        transform: translateY(30px);
    }
}

.page-exit {
    animation: pageExit 0.3s ease-in forwards;
}

/* ============================================================================
   CARD & HOVER EFFECTS
   ============================================================================ */

/* Card Lift on Hover */
.card-hover {
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.card-hover:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

/* Card Glow Effect */
.card-glow {
    position: relative;
    overflow: hidden;
}

.card-glow::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(
        circle,
        rgba(74, 124, 67, 0.3) 0%,
        transparent 70%
    );
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
}

.card-glow:hover::before {
    opacity: 1;
}

/* ============================================================================
   RESPONSIVE IMPROVEMENTS
   ============================================================================ */

/* Mobile Menu Animation */
@keyframes slideOutLeft {
    from {
        opacity: 1;
        transform: translateX(0);
    }
    to {
        opacity: 0;
        transform: translateX(-100%);
    }
}

.mobile-menu-exit {
    animation: slideOutLeft 0.3s ease-in forwards;
}

/* Touch-Friendly Buttons */
@media (max-width: 768px) {
    button,
    a {
        min-height: 44px;
        min-width: 44px;
    }

    .btn-primary {
        padding: 0.875rem 1.5rem;
        font-size: 1rem;
    }
}

/* ============================================================================
   ACCESSIBILITY & FOCUS STATES
   ============================================================================ */

/* Focus Visible Ring */
:focus-visible {
    outline: 2px solid #4a7c43;
    outline-offset: 2px;
}

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

/* ============================================================================
   PAYMENT PROCESSING STATES
   ============================================================================ */

/* Payment Processing */
.payment-processing {
    position: relative;
    pointer-events: none;
}

.payment-processing::after {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(255, 255, 255, 0.5);
    border-radius: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 1;
}

.dark .payment-processing::after {
    background: rgba(0, 0, 0, 0.5);
}

/* ============================================================================
   TOAST & NOTIFICATION ANIMATIONS
   ============================================================================ */

/* Toast Animations */
@keyframes toastEnter {
    from {
        opacity: 0;
        transform: translateX(400px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes toastExit {
    from {
        opacity: 1;
        transform: translateX(0);
    }
    to {
        opacity: 0;
        transform: translateX(400px);
    }
}

.toast-enter {
    animation: toastEnter 0.3s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

.toast-exit {
    animation: toastExit 0.3s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

/* ============================================================================
   PROGRESS INDICATORS
   ============================================================================ */

/* Progress Bar Animation */
@keyframes progressFill {
    0% {
        width: 0;
    }
}

.progress-bar {
    height: 4px;
    background: linear-gradient(
        90deg,
        #4a7c43 0%,
        #6b9e5f 100%
    );
    border-radius: 2px;
    overflow: hidden;
}

.progress-bar.indeterminate {
    animation: progressFill 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

/* ============================================================================
   MODAL & OVERLAY ANIMATIONS
   ============================================================================ */

/* Modal Enter */
@keyframes modalEnter {
    from {
        opacity: 0;
        transform: scale(0.95);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.modal-enter {
    animation: modalEnter 0.3s ease-out forwards;
}

/* Backdrop Fade */
@keyframes backdropFade {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.backdrop-fade {
    animation: backdropFade 0.2s ease-out forwards;
}

/* ============================================================================
   SKELETON LOADERS FOR SPECIFIC COMPONENTS
   ============================================================================ */

.skeleton-product-card {
    height: 400px;
    margin-bottom: 1rem;
}

.skeleton-product-image {
    height: 250px;
    margin-bottom: 1rem;
}

.skeleton-text-line {
    height: 0.75rem;
    margin-bottom: 0.5rem;
    border-radius: 0.25rem;
}

.skeleton-text-lines {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.skeleton-text-lines .skeleton-text-line:last-child {
    width: 80%;
    margin-bottom: 0;
}

/* ============================================================================
   STAGGER ANIMATIONS FOR LISTS
   ============================================================================ */

.stagger-item {
    animation: fadeInUp 0.4s ease-out forwards;
}

.stagger-item:nth-child(1) {
    animation-delay: 0s;
}
.stagger-item:nth-child(2) {
    animation-delay: 0.05s;
}
.stagger-item:nth-child(3) {
    animation-delay: 0.1s;
}
.stagger-item:nth-child(4) {
    animation-delay: 0.15s;
}
.stagger-item:nth-child(5) {
    animation-delay: 0.2s;
}
.stagger-item:nth-child(n+6) {
    animation-delay: 0.25s;
}

/* ============================================================================
   DARK MODE ENHANCEMENTS
   ============================================================================ */

.dark .form-error {
    color: #fca5a5;
}

.dark .form-success {
    color: #6ee7b7;
}

.dark button:focus-visible {
    outline-color: #6b9e5f;
}