/* ============================================
   Rotteri Animation System — CSS Foundation
   ============================================
   Modular animation tokens, keyframes, and 
   scroll-reveal states for the marketplace.
   ============================================ */

/* === CUSTOM PROPERTIES (ANIMATION TOKENS) === */
:root {
    /* Durations */
    --anim-duration-fast: 200ms;
    --anim-duration-normal: 300ms;
    --anim-duration-slow: 600ms;
    --anim-duration-counter: 1200ms;

    /* Easings */
    --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
    --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
    --ease-in: cubic-bezier(0.55, 0, 1, 0.45);
    --ease-standard: cubic-bezier(0.4, 0, 0.2, 1);

    /* Distance / Scale */
    --anim-slide-distance: 20px;
    --anim-scale-from: 0.97;
    --anim-scale-to: 1.03;

    /* Skeleton */
    --skeleton-gradient: linear-gradient(90deg, var(--surface) 25%, var(--surface-2) 50%, var(--surface) 75%);
    --skeleton-cycle: 2s;

    /* Toast */
    --toast-success: #34D399;
    --toast-error: #F87171;
    --toast-info: #60A5FA;
    --toast-gap: 8px;
}

/* === KEYFRAMES === */

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

@keyframes fade-up {
    from {
        opacity: 0;
        transform: translateY(var(--anim-slide-distance));
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fade-left {
    from {
        opacity: 0;
        transform: translateX(var(--anim-slide-distance));
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes fade-right {
    from {
        opacity: 0;
        transform: translateX(calc(var(--anim-slide-distance) * -1));
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

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

@keyframes ripple {
    0% {
        transform: scale(0);
        opacity: 0.4;
    }
    100% {
        transform: scale(4);
        opacity: 0;
    }
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    20% { transform: translateX(-6px); }
    40% { transform: translateX(6px); }
    60% { transform: translateX(-4px); }
    80% { transform: translateX(4px); }
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
        transform: scale(1);
    }
    50% {
        opacity: 0.7;
        transform: scale(1.02);
    }
}

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

/* === SCROLL REVEAL BASE STATES === */

.animate-on-scroll {
    opacity: 0;
    transform: translateY(var(--anim-slide-distance));
    transition:
        opacity var(--anim-duration-slow) var(--ease-out),
        transform var(--anim-duration-slow) var(--ease-out);
    will-change: opacity, transform;
}

.animate-on-scroll[data-anim="fade-left"] {
    transform: translateX(var(--anim-slide-distance));
}

.animate-on-scroll[data-anim="fade-right"] {
    transform: translateX(calc(var(--anim-slide-distance) * -1));
}

.animate-on-scroll[data-anim="scale-in"] {
    transform: scale(var(--anim-scale-from));
}

/* Visible / animated end state */
.animate-on-scroll.anim-visible {
    opacity: 1;
    transform: translateY(0) translateX(0) scale(1);
}

/* === REDUCED MOTION OVERRIDES === */

@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;
    }

    .animate-on-scroll {
        opacity: 1;
        transform: none;
        transition: none;
    }

    .animate-on-scroll.anim-visible {
        transform: none;
    }
}

/* === SKELETON SCREEN STYLES === */

.skeleton-placeholder {
    background: var(--skeleton-gradient);
    background-size: 200% 100%;
    animation: shimmer var(--skeleton-cycle) infinite linear;
    border-radius: 8px;
    position: relative;
    overflow: hidden;
}

/* Skeleton variant: Product card (used in product-grid template) */
.skeleton-card {
    display: flex;
    flex-direction: column;
    gap: 10px;
    padding: 12px;
    border-radius: 12px;
    background: var(--skeleton-gradient);
    background-size: 200% 100%;
    animation: shimmer var(--skeleton-cycle) infinite linear;
    height: 260px;
}

/* Skeleton variant: Hero banner */
.skeleton-hero {
    width: 100%;
    height: 200px;
    border-radius: 16px;
    background: var(--skeleton-gradient);
    background-size: 200% 100%;
    animation: shimmer var(--skeleton-cycle) infinite linear;
}

/* Skeleton variant: Category row item */
.skeleton-cat {
    width: 72px;
    height: 90px;
    border-radius: 12px;
    background: var(--skeleton-gradient);
    background-size: 200% 100%;
    animation: shimmer var(--skeleton-cycle) infinite linear;
    flex-shrink: 0;
}

/* Skeleton variant: Store card */
.skeleton-store {
    width: 100%;
    height: 180px;
    border-radius: 12px;
    background: var(--skeleton-gradient);
    background-size: 200% 100%;
    animation: shimmer var(--skeleton-cycle) infinite linear;
}

/* Skeleton variant: Dashboard stat card */
.skeleton-stat {
    width: 100%;
    height: 80px;
    border-radius: 10px;
    background: var(--skeleton-gradient);
    background-size: 200% 100%;
    animation: shimmer var(--skeleton-cycle) infinite linear;
}

/* Crossfade: skeleton to real content */
.skeleton-loaded {
    animation: none;
    opacity: 0;
    transition: opacity var(--anim-duration-normal) var(--ease-out);
}

.skeleton-loaded.visible {
    opacity: 1;
}

/* Image fallback pulse for failed loads */
.img-fallback-pulse {
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--surface, #f0f0f0);
    border-radius: 8px;
    animation: pulse 2s infinite ease-in-out;
}

/* === TOAST NOTIFICATION STYLES === */

/* --- Keyframes --- */

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

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

@keyframes toast-progress-shrink {
    from {
        width: 100%;
    }
    to {
        width: 0%;
    }
}

/* --- Toast Container --- */

.toast-container {
    position: fixed;
    top: 16px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 9999;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--toast-gap, 8px);
    pointer-events: none;
    width: 100%;
    max-width: 400px;
    padding: 0 16px;
    box-sizing: border-box;
}

/* --- Individual Toast --- */

.toast {
    position: relative;
    display: flex;
    align-items: center;
    width: 100%;
    padding: 12px 16px;
    border-radius: 8px;
    background: var(--surface, #fff);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    border-left: 4px solid var(--toast-info);
    overflow: hidden;
    pointer-events: auto;
    animation: toast-slide-in 300ms var(--ease-spring) forwards;
    will-change: transform, opacity;
}

.toast.toast--dismissing {
    animation: toast-slide-out 250ms var(--ease-in) forwards;
}

/* --- Toast Content --- */

.toast-message {
    flex: 1;
    font-size: 14px;
    line-height: 1.4;
    color: var(--text, #1f2937);
    margin: 0;
}

.toast-close {
    appearance: none;
    border: none;
    background: transparent;
    cursor: pointer;
    padding: 4px;
    margin-left: 8px;
    color: var(--text-muted, #6b7280);
    font-size: 18px;
    line-height: 1;
    opacity: 0.6;
    transition: opacity var(--anim-duration-fast) ease;
}

.toast-close:hover {
    opacity: 1;
}

/* --- Toast Progress Bar --- */

.toast-progress {
    position: absolute;
    bottom: 0;
    left: 0;
    height: 3px;
    width: 100%;
    background: currentColor;
    opacity: 0.3;
    animation: toast-progress-shrink 2800ms linear forwards;
    transform-origin: left center;
}

/* --- Type Variants --- */

.toast--success {
    border-left-color: var(--toast-success);
}

.toast--success .toast-progress {
    color: var(--toast-success);
}

.toast--error {
    border-left-color: var(--toast-error);
}

.toast--error .toast-progress {
    color: var(--toast-error);
}

.toast--info {
    border-left-color: var(--toast-info);
}

.toast--info .toast-progress {
    color: var(--toast-info);
}

/* --- Reduced Motion Override for Toasts --- */

@media (prefers-reduced-motion: reduce) {
    .toast {
        animation: none;
        opacity: 1;
        transform: translateY(0);
    }

    .toast.toast--dismissing {
        animation: none;
        display: none;
    }

    .toast-progress {
        animation: none;
        width: 0%;
    }
}


/* ============================================
   MODAL TRANSITIONS
   ============================================ */

/* Center modal open/close */
.modal-anim {
    opacity: 0;
    transform: scale(0.9);
    transition:
        opacity var(--anim-duration-normal) var(--ease-out),
        transform var(--anim-duration-normal) var(--ease-out);
    will-change: opacity, transform;
}

.modal-anim.modal-open {
    opacity: 1;
    transform: scale(1);
}

.modal-anim.modal-closing {
    opacity: 0;
    transform: scale(0.95);
    transition:
        opacity 200ms var(--ease-in),
        transform 200ms var(--ease-in);
}

/* Bottom-sheet modal */
.modal-bottom-sheet {
    opacity: 1;
    transform: translateY(100%);
    transition: transform 350ms var(--ease-spring);
    will-change: transform;
}

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

.modal-bottom-sheet.modal-closing {
    transform: translateY(100%);
    transition: transform 300ms var(--ease-in);
}

/* Modal backdrop */
.modal-backdrop-anim {
    opacity: 0;
    background-color: rgba(0, 0, 0, 0.5);
    transition: opacity 250ms var(--ease-standard);
    will-change: opacity;
}

.modal-backdrop-anim.backdrop-visible {
    opacity: 1;
}

/* ============================================
   BUTTON PRESS / HOVER TRANSITIONS
   ============================================ */

/* Base button transition */
.btn,
[class*="btn-"] {
    transition:
        transform 150ms var(--ease-standard),
        filter 200ms var(--ease-standard),
        box-shadow 200ms var(--ease-standard);
    will-change: transform;
}

/* Button hover — brighten 10% + lift 1px */
.btn:hover,
[class*="btn-"]:hover {
    filter: brightness(1.1);
    transform: translateY(-1px);
}

/* Button press — scale down */
.btn:active,
[class*="btn-"]:active {
    transform: scale(0.95);
    transition-duration: 100ms;
}

/* ============================================
   RIPPLE EFFECT
   ============================================ */

.ripple-effect {
    position: absolute;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.35);
    pointer-events: none;
    animation: ripple 400ms ease-out forwards;
    transform: scale(0);
}

/* Container needs relative/overflow hidden for ripple */
[data-ripple],
.ripple {
    position: relative;
    overflow: hidden;
}

/* ============================================
   FORM INPUT FOCUS TRANSITION
   ============================================ */

input,
textarea,
select {
    transition: border-color 200ms var(--ease-standard);
}

input:focus,
textarea:focus,
select:focus {
    border-color: var(--primary);
    outline: none;
}

/* ============================================
   NAVBAR SHOW/HIDE TRANSITIONS
   ============================================ */

.navbar-anim {
    transition: transform var(--anim-duration-normal) var(--ease-out);
    will-change: transform;
}

.navbar-anim.navbar-hidden {
    transform: translateY(-100%);
}

.navbar-anim.navbar-visible {
    transform: translateY(0);
}

/* ============================================
   BOTTOM-NAV INDICATOR & ICON TRANSITIONS
   ============================================ */

.bottom-nav-indicator {
    transition:
        transform var(--anim-duration-normal) var(--ease-out),
        width var(--anim-duration-normal) var(--ease-out);
    will-change: transform, width;
}

.bottom-nav .nav-btn .nav-icon {
    transition: transform 200ms var(--ease-spring);
}

.bottom-nav .nav-btn.active .nav-icon {
    transform: scale(1.2);
}

/* ============================================
   RESPONSIVE GRID TRANSITION
   ============================================ */

.grid-anim,
.product-grid,
.store-grid {
    transition: grid-template-columns var(--anim-duration-normal) var(--ease-standard);
}

/* ============================================
   SIDEBAR SLIDE-IN (DESKTOP DASHBOARD)
   ============================================ */

.sidebar-anim {
    transform: translateX(-100%);
    transition: transform 350ms var(--ease-out);
    will-change: transform;
}

.sidebar-anim.sidebar-visible {
    transform: translateX(0);
}

/* ============================================
   BOTTOM-NAV RESPONSIVE PADDING/ICON SIZING
   ============================================ */

.bottom-nav {
    transition:
        padding 250ms var(--ease-standard),
        gap 250ms var(--ease-standard);
}

.bottom-nav .nav-btn {
    transition:
        font-size 250ms var(--ease-standard),
        padding 250ms var(--ease-standard);
}

/* ============================================
   RESPONSIVE SIDEBAR FOR DESKTOP (14.5)
   ============================================ */

@media (min-width: 1024px) {
    .dashboard-sidebar {
        transform: translateX(-100%);
        transition: transform 350ms var(--ease-out);
        will-change: transform;
    }

    .dashboard-sidebar.sidebar-open {
        transform: translateX(0);
    }
}