/* Custom animations and utility classes */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes slideIn {
    from { opacity: 0; transform: translateX(-20px); }
    to { opacity: 1; transform: translateX(0); }
}

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

.animate-fade-in-up {
    animation: fadeInUp 0.4s ease-out forwards;
}

.product-card {
    animation: fadeInUp 0.4s ease-out;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.product-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 25px -12px rgba(0, 0, 0, 0.1);
}

/* Skeleton loader */
.skeleton {
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 1000px 100%;
    animation: shimmer 1.5s infinite;
}

/* Filter section */
.filter-panel {
    transition: all 0.3s ease;
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    padding: 0;
}

.filter-panel.open {
    max-height: 500px;
    opacity: 1;
    padding: 1rem 0;
}

/* Mobile sidebar */
.mobile-sidebar {
    position: fixed;
    top: 0;
    left: -280px;
    width: 280px;
    height: 100vh;
    background: white;
    z-index: 1000;
    transition: left 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    overflow-y: auto;
    box-shadow: 2px 0 20px rgba(0,0,0,0.1);
}

.mobile-sidebar.open {
    left: 0;
}

.sidebar-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0,0,0,0.5);
    z-index: 999;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.sidebar-overlay.open {
    opacity: 1;
    visibility: visible;
}

/* Scroll to top button - hidden for logged in users */
.scroll-top-btn {
    position: fixed;
    bottom: 80px;
    right: 24px;
    width: 44px;
    height: 44px;
    background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 40;
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

.scroll-top-btn.visible {
    opacity: 1;
    visibility: visible;
}

.scroll-top-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.4);
}

/* Hero message carousel */
.hero-message {
    transition: opacity 0.5s ease;
}

/* Modal animations */
.swap-modal {
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    transition: all 0.3s ease;
}

.swap-modal .modal-content {
    transform: scale(0.95);
    transition: transform 0.2s ease;
}

.swap-modal:not(.hidden) .modal-content {
    transform: scale(1);
}

/* Floating add button */
.floating-add-btn {
    position: fixed;
    bottom: 80px;
    right: 24px;
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    color: white;
    border-radius: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 14px rgba(99, 102, 241, 0.4);
    transition: all 0.3s ease;
    z-index: 40;
}

.floating-add-btn:hover {
    transform: scale(1.1);
    box-shadow: 0 8px 25px rgba(99, 102, 241, 0.5);
}

/* Toast notifications */
.toast-notification {
    position: fixed;
    bottom: 100px;
    right: 24px;
    z-index: 1000;
    animation: slideInRight 0.3s ease-out;
}

@keyframes slideInRight {
    from { opacity: 0; transform: translateX(100px); }
    to { opacity: 1; transform: translateX(0); }
}

/* Custom scrollbar */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
    border-radius: 10px;
}

::-webkit-scrollbar-thumb {
    background: #c5c5c5;
    border-radius: 10px;
}

::-webkit-scrollbar-thumb:hover {
    background: #a0a0a0;
}

/* Loading spinner */
.loading-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid #e5e7eb;
    border-top-color: #6366f1;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* User dropdown fix */
.user-dropdown {
    position: absolute;
    top: 100%;
    right: 0;
    width: 200px;
    background: white;
    border-radius: 12px;
    box-shadow: 0 10px 25px -5px rgba(0,0,0,0.1);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: all 0.2s ease;
    z-index: 50;
    margin-top: 8px;
    overflow: hidden;
}

.user-dropdown.active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}