/* ========================================
   APP-LIKE EXPERIENCE CSS
   Native-like animations, transitions, gestures
   ======================================== */

/* ==================== CSS VARIABLES ==================== */
:root {
    /* Animation Timing */
    --animation-fast: 150ms;
    --animation-normal: 250ms;
    --animation-slow: 400ms;
    --animation-page: 300ms;
    
    /* Easing Functions (Native-like) */
    --ease-out-expo: cubic-bezier(0.19, 1, 0.22, 1);
    --ease-out-quart: cubic-bezier(0.25, 1, 0.5, 1);
    --ease-in-out-cubic: cubic-bezier(0.645, 0.045, 0.355, 1);
    --ease-spring: cubic-bezier(0.175, 0.885, 0.32, 1.275);
    
    /* Touch Feedback */
    --touch-scale: 0.95;
    --touch-opacity: 0.7;
}

/* ==================== PAGE TRANSITIONS ==================== */
.page-transition-enter {
    opacity: 0;
    transform: translateX(100%);
}

.page-transition-enter-active {
    opacity: 1;
    transform: translateX(0);
    transition: opacity var(--animation-page) var(--ease-out-quart),
                transform var(--animation-page) var(--ease-out-quart);
}

.page-transition-exit {
    opacity: 1;
    transform: translateX(0);
}

.page-transition-exit-active {
    opacity: 0;
    transform: translateX(-30%);
    transition: opacity var(--animation-page) var(--ease-out-quart),
                transform var(--animation-page) var(--ease-out-quart);
}

/* ==================== SKELETON LOADERS ==================== */
@keyframes skeleton-loading {
    0% {
        background-position: -200% 0;
    }
    100% {
        background-position: 200% 0;
    }
}

.skeleton {
    background: linear-gradient(
        90deg,
        rgba(255, 221, 173, 0.05) 0%,
        rgba(255, 221, 173, 0.15) 50%,
        rgba(255, 221, 173, 0.05) 100%
    );
    background-size: 200% 100%;
    animation: skeleton-loading 1.5s ease-in-out infinite;
    border-radius: var(--radius-md);
}

.skeleton-text {
    height: 16px;
    margin-bottom: 8px;
    border-radius: 4px;
}

.skeleton-title {
    height: 24px;
    width: 60%;
    margin-bottom: 12px;
    border-radius: 6px;
}

.skeleton-image {
    height: 200px;
    width: 100%;
    border-radius: var(--radius-lg);
}

.skeleton-card {
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-md);
}

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

.skeleton-button {
    height: 44px;
    width: 100px;
    border-radius: var(--radius-md);
}

/* ==================== NATIVE-LIKE ANIMATIONS ==================== */
@keyframes slide-up {
    from {
        transform: translateY(100%);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

@keyframes slide-down {
    from {
        transform: translateY(-100%);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

@keyframes fade-in-scale {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes bounce-in {
    0% {
        transform: scale(0.3);
        opacity: 0;
    }
    50% {
        transform: scale(1.05);
    }
    70% {
        transform: scale(0.9);
    }
    100% {
        transform: scale(1);
        opacity: 1;
    }
}

.animate-slide-up {
    animation: slide-up var(--animation-slow) var(--ease-out-expo);
}

.animate-slide-down {
    animation: slide-down var(--animation-slow) var(--ease-out-expo);
}

.animate-fade-in-scale {
    animation: fade-in-scale var(--animation-normal) var(--ease-out-quart);
}

.animate-bounce-in {
    animation: bounce-in var(--animation-slow) var(--ease-spring);
}

/* ==================== TOUCH FEEDBACK ==================== */
.touch-feedback {
    position: relative;
    overflow: hidden;
    transform: translateZ(0);
    -webkit-tap-highlight-color: transparent;
}

.touch-feedback::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(224, 179, 102, 0.3);
    transform: translate(-50%, -50%);
    transition: width var(--animation-fast) ease-out,
                height var(--animation-fast) ease-out;
}

.touch-feedback:active::before {
    width: 300px;
    height: 300px;
}

.touch-feedback:active {
    transform: scale(var(--touch-scale));
    transition: transform var(--animation-fast) var(--ease-out-quart);
}

/* ==================== BOTTOM SHEET ==================== */
.bottom-sheet {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-top-left-radius: var(--radius-xl);
    border-top-right-radius: var(--radius-xl);
    box-shadow: 0 -4px 24px rgba(0, 0, 0, 0.4);
    transform: translateY(100%);
    transition: transform var(--animation-slow) var(--ease-out-expo);
    z-index: var(--z-modal);
    max-height: 90vh;
    overflow-y: auto;
    overscroll-behavior: contain;
}

.bottom-sheet.active {
    transform: translateY(0);
}

.bottom-sheet-handle {
    width: 40px;
    height: 4px;
    background: rgba(255, 221, 173, 0.3);
    border-radius: 2px;
    margin: var(--spacing-sm) auto;
    cursor: grab;
}

.bottom-sheet-handle:active {
    cursor: grabbing;
}

.bottom-sheet-content {
    padding: 0 var(--spacing-lg) var(--spacing-xl);
}

/* ==================== ACTION SHEET ==================== */
.action-sheet {
    position: fixed;
    bottom: var(--spacing-md);
    left: var(--spacing-md);
    right: var(--spacing-md);
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    transform: translateY(calc(100% + var(--spacing-md)));
    transition: transform var(--animation-slow) var(--ease-out-expo);
    z-index: var(--z-modal);
}

.action-sheet.active {
    transform: translateY(0);
}

.action-sheet-item {
    padding: var(--spacing-md) var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
    cursor: pointer;
    transition: background var(--animation-fast);
}

.action-sheet-item:last-child {
    border-bottom: none;
}

.action-sheet-item:active {
    background: rgba(224, 179, 102, 0.1);
}

.action-sheet-cancel {
    margin-top: var(--spacing-sm);
    padding: var(--spacing-md);
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    border-radius: var(--radius-xl);
    text-align: center;
    font-weight: 700;
    color: var(--color-highlight);
}

/* ==================== PULL TO REFRESH ==================== */
.pull-to-refresh {
    position: relative;
    overflow: hidden;
}

.pull-to-refresh-indicator {
    position: absolute;
    top: -60px;
    left: 50%;
    transform: translateX(-50%);
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: top var(--animation-fast) var(--ease-out-quart);
}

.pull-to-refresh-indicator.visible {
    top: var(--spacing-md);
}

.pull-to-refresh-spinner {
    width: 30px;
    height: 30px;
    border: 3px solid rgba(224, 179, 102, 0.3);
    border-top-color: var(--color-highlight);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* ==================== SWIPE GESTURES ==================== */
.swipeable {
    touch-action: pan-y;
    user-select: none;
    -webkit-user-select: none;
}

.swipe-left {
    transform: translateX(-100%);
    transition: transform var(--animation-normal) var(--ease-out-quart);
}

.swipe-right {
    transform: translateX(100%);
    transition: transform var(--animation-normal) var(--ease-out-quart);
}

/* ==================== LOADING STATES ==================== */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(102, 46, 20, 0.95);
    backdrop-filter: blur(10px);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: calc(var(--z-modal) + 1);
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--animation-normal);
}

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

.loading-spinner {
    width: 60px;
    height: 60px;
    border: 4px solid rgba(224, 179, 102, 0.2);
    border-top-color: var(--color-highlight);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

.loading-text {
    margin-top: var(--spacing-md);
    color: var(--color-text);
    font-size: var(--font-size-lg);
    font-weight: 600;
}

/* ==================== ERROR BOUNDARIES ==================== */
.error-boundary {
    min-height: 400px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xl);
    text-align: center;
}

.error-icon {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: rgba(244, 67, 54, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-lg);
}

.error-icon i {
    font-size: 40px;
    color: var(--color-error);
}

.error-title {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--color-highlight);
    margin-bottom: var(--spacing-sm);
}

.error-message {
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-lg);
    max-width: 400px;
}

.error-action {
    padding: var(--spacing-sm) var(--spacing-xl);
    background: var(--color-highlight);
    color: var(--color-primary);
    border-radius: var(--radius-md);
    font-weight: 700;
    cursor: pointer;
    transition: all var(--animation-fast);
}

.error-action:hover {
    background: var(--color-highlight-light);
    transform: translateY(-2px);
}

/* ==================== APP SHELL ==================== */
.app-shell {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.app-header {
    position: sticky;
    top: 0;
    z-index: var(--z-nav);
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
}

.app-content {
    flex: 1;
    padding-bottom: 80px; /* Space for bottom nav */
}

.app-footer {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: var(--z-nav);
}

/* ==================== SMOOTH SCROLL ==================== */
html {
    scroll-behavior: smooth;
}

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

/* ==================== SAFE AREAS (iOS Notch) ==================== */
.safe-area-top {
    padding-top: env(safe-area-inset-top);
}

.safe-area-bottom {
    padding-bottom: env(safe-area-inset-bottom);
}

.safe-area-left {
    padding-left: env(safe-area-inset-left);
}

.safe-area-right {
    padding-right: env(safe-area-inset-right);
}

/* ==================== PROGRESSIVE ENHANCEMENT ==================== */
@supports (backdrop-filter: blur(10px)) or (-webkit-backdrop-filter: blur(10px)) {
    .bottom-sheet,
    .action-sheet,
    .app-header {
        background: rgba(102, 46, 20, 0.8);
    }
}

/* ==================== MOBILE OPTIMIZATIONS ==================== */
@media (max-width: 767px) {
    .bottom-sheet {
        max-height: 85vh;
    }
    
    .touch-feedback:active {
        transform: scale(0.97);
    }
}

/* ==================== STAGGER ANIMATIONS ==================== */
.stagger-item {
    opacity: 0;
    transform: translateY(20px);
    animation: fade-in-up var(--animation-slow) var(--ease-out-expo) forwards;
}

@keyframes fade-in-up {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.stagger-item:nth-child(1) { animation-delay: 0ms; }
.stagger-item:nth-child(2) { animation-delay: 50ms; }
.stagger-item:nth-child(3) { animation-delay: 100ms; }
.stagger-item:nth-child(4) { animation-delay: 150ms; }
.stagger-item:nth-child(5) { animation-delay: 200ms; }
.stagger-item:nth-child(6) { animation-delay: 250ms; }
.stagger-item:nth-child(7) { animation-delay: 300ms; }
.stagger-item:nth-child(8) { animation-delay: 350ms; }
.stagger-item:nth-child(9) { animation-delay: 400ms; }
.stagger-item:nth-child(10) { animation-delay: 450ms; }

/* ==================== HAPTIC FEEDBACK (Visual) ==================== */
@keyframes haptic-pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

.haptic-feedback:active {
    animation: haptic-pulse 100ms var(--ease-out-quart);
}