/* ==================== ROOT VARIABLES ==================== */
:root {
    --primary-color: #10b981;
    --primary-dark: #059669;
    --primary-light: #d1fae5;
    --secondary-color: #f59e0b;
    --danger-color: #ef4444;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --info-color: #3b82f6;
    --bg-light: #f9fafb;
    --bg-light-2: #f3f4f6;
    --bg-light-3: #e5e7eb;
    --text-dark: #1f2937;
    --text-gray: #6b7280;
    --text-light: #9ca3af;
    --border-color: #d1d5db;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: all 0.15s ease-out;
    --transition-slow: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-full: 9999px;
}

/* ==================== DARK MODE VARIABLES ==================== */
body.dark-mode {
    --bg-light: #111827;
    --bg-light-2: #1f2937;
    --bg-light-3: #374151;
    --text-dark: #f9fafb;
    --text-gray: #d1d5db;
    --text-light: #9ca3af;
    --border-color: #4b5563;
}

/* ==================== GLOBAL STYLES ==================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

*::before,
*::after {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background-color: var(--bg-light);
    color: var(--text-dark);
    transition: var(--transition);
    line-height: 1.6;
    font-size: 16px;
    overflow-x: hidden;
}

/* ==================== SKIP TO MAIN CONTENT (ACCESSIBILITY) ==================== */
.skip-to-main {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--primary-color);
    color: white;
    padding: 8px 16px;
    z-index: 100;
    text-decoration: none;
    border-radius: 0 0 4px 0;
    font-weight: 600;
}

.skip-to-main:focus {
    top: 0;
}

/* ==================== HEADER STYLES ==================== */
.header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    padding: 1rem;
    box-shadow: var(--shadow-lg);
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(10px);
}

.header-container {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1.5rem;
    padding: 0 1rem;
}

/* Logo Section */
.logo-section {
    display: flex;
    align-items: center;
    gap: 1rem;
    min-width: fit-content;
    flex-shrink: 0;
}

.logo-img {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.15);
    padding: 0.5rem;
    object-fit: contain;
    transition: var(--transition);
    border: 2px solid rgba(255, 255, 255, 0.2);
    display: block;
}

.logo-img:hover {
    transform: scale(1.1) rotate(5deg);
    background: rgba(255, 255, 255, 0.25);
    border-color: rgba(255, 255, 255, 0.4);
}

.logo-img:active {
    transform: scale(0.95);
}

/* Store Name */
.store-name {
    font-size: 2rem;
    font-weight: 900;
    color: white;
    letter-spacing: -1px;
    font-family: 'Poppins', sans-serif;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.2);
    background: linear-gradient(135deg, #ffffff 0%, #f0f0f0 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: textGlow 3s ease-in-out infinite;
    white-space: nowrap;
}

@keyframes textGlow {
    0%, 100% {
        filter: drop-shadow(0 0 8px rgba(255, 255, 255, 0.3));
        transform: scale(1);
    }
    50% {
        filter: drop-shadow(0 0 15px rgba(255, 255, 255, 0.6));
        transform: scale(1.02);
    }
}

/* Money Display in Header */
.money-display-header {
    background: rgba(255, 255, 255, 0.15);
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-full);
    backdrop-filter: blur(10px);
    border: 2px solid rgba(255, 255, 255, 0.2);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex: 0 1 auto;
    transition: var(--transition);
    box-shadow: inset 0 2px 4px rgba(255, 255, 255, 0.1);
}

.money-display-header:hover {
    background: rgba(255, 255, 255, 0.25);
    border-color: rgba(255, 255, 255, 0.4);
    transform: scale(1.05);
}

.money-display-header:active {
    transform: scale(0.98);
}

.currency-symbol-header {
    font-size: 1.5rem;
    color: white;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.money-amount-header {
    font-size: 1.3rem;
    color: white;
    font-weight: 800;
    font-variant-numeric: tabular-nums;
    letter-spacing: -0.5px;
    min-width: 200px;
    text-align: right;
}

.money-amount-header.pulse {
    animation: moneyPulseHeader 0.6s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

@keyframes moneyPulseHeader {
    0% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.15);
    }
    100% {
        transform: scale(1);
    }
}

/* Header Controls */
.header-controls {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-shrink: 0;
}

.theme-toggle {
    background: rgba(255, 255, 255, 0.2);
    border: 2px solid rgba(255, 255, 255, 0.3);
    color: white;
    width: 45px;
    height: 45px;
    border-radius: 50%;
    font-size: 1.2rem;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
    outline: none;
}

.theme-toggle:hover {
    background: rgba(255, 255, 255, 0.3);
    border-color: rgba(255, 255, 255, 0.5);
    transform: scale(1.1) rotate(20deg);
}

.theme-toggle:active {
    transform: scale(0.95) rotate(20deg);
}

.theme-toggle:focus {
    box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.3);
}

.theme-toggle i {
    transition: var(--transition-fast);
}

/* ==================== FILTER SECTION ==================== */
.filter-section {
    background: var(--bg-light);
    padding: 2rem 1rem;
    border-bottom: 2px solid var(--border-color);
    transition: var(--transition);
}

.filter-container {
    max-width: 1400px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    align-items: center;
    padding: 0 1rem;
}

/* Search Box */
.search-box {
    display: flex;
    align-items: center;
    background: white;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-full);
    padding: 0.75rem 1.5rem;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}

body.dark-mode .search-box {
    background: var(--bg-light-2);
}

.search-box:focus-within {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px var(--primary-light);
}

body.dark-mode .search-box:focus-within {
    box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.2);
}

.search-box i {
    color: var(--text-light);
    margin-right: 0.75rem;
    font-size: 1.1rem;
    flex-shrink: 0;
}

.search-input {
    border: none;
    background: transparent;
    font-family: inherit;
    width: 100%;
    font-size: 1rem;
    color: var(--text-dark);
    outline: none;
    padding: 0.25rem 0;
}

.search-input::placeholder {
    color: var(--text-light);
}

/* Sort Box */
.sort-box {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.sort-label {
    font-weight: 600;
    color: var(--text-dark);
    white-space: nowrap;
    font-size: 0.95rem;
}

.sort-select {
    padding: 0.75rem 1rem;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    background: white;
    color: var(--text-dark);
    font-family: inherit;
    font-size: 0.95rem;
    cursor: pointer;
    transition: var(--transition);
    flex: 1;
    box-shadow: var(--shadow-sm);
    appearance: none;
    background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
    background-size: 1.25em 1.25em;
    padding-right: 2.5rem;
}

body.dark-mode .sort-select {
    background-color: var(--bg-light-2);
    color: var(--text-dark);
    border-color: var(--border-color);
}

.sort-select:hover {
    border-color: var(--primary-color);
}

.sort-select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px var(--primary-light);
}

body.dark-mode .sort-select:focus {
    box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.2);
}

.sort-select:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* ==================== MAIN CONTENT ==================== */
.main-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: 3rem 1rem;
    min-height: 60vh;
}

.products-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 2rem;
    animation: fadeIn 0.5s ease-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

/* Empty State */
.products-container:empty::after {
    content: 'No products found';
    grid-column: 1 / -1;
    text-align: center;
    padding: 3rem;
    color: var(--text-gray);
}

/* ==================== PRODUCT CARD STYLES ==================== */
.product-card {
    background: white;
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    border: 2px solid transparent;
    display: flex;
    flex-direction: column;
    animation: scaleIn 0.4s ease-out;
    overflow: hidden;
    position: relative;
}

body.dark-mode .product-card {
    background: var(--bg-light-2);
    border-color: var(--border-color);
}

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

.product-card:hover {
    box-shadow: var(--shadow-xl);
    transform: translateY(-8px);
    border-color: var(--primary-color);
}

.product-card:focus-within {
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-color);
}

/* Product Image Container */
.product-image-container {
    width: 100%;
    height: 150px;
    background: var(--bg-light-2);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1rem;
    overflow: hidden;
    position: relative;
}

body.dark-mode .product-image-container {
    background: var(--bg-light-3);
}

.product-image {
    width: 120px;
    height: 120px;
    object-fit: contain;
    transition: var(--transition);
    display: block;
}

.product-card:hover .product-image {
    transform: scale(1.15) rotate(10deg);
}

/* Product Info */
.product-info {
    flex: 1;
    margin-bottom: 1rem;
}

.product-name {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 0.5rem;
    text-transform: capitalize;
    word-break: break-word;
}

.product-price {
    font-size: 1.8rem;
    font-weight: 800;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
    font-variant-numeric: tabular-nums;
    letter-spacing: -0.5px;
}

.product-quantity-owned {
    font-size: 0.85rem;
    color: var(--text-gray);
    font-weight: 500;
}

.product-quantity-owned strong {
    color: var(--primary-color);
    font-weight: 700;
}

/* ==================== PRODUCT CONTROLS ==================== */
.product-controls {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1rem;
    margin-bottom: 1rem;
}

/* Quantity Control */
.quantity-control {
    display: flex;
    align-items: stretch;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    background: var(--bg-light);
    overflow: hidden;
    transition: var(--transition);
}

body.dark-mode .quantity-control {
    background: var(--bg-light-3);
}

.quantity-control:focus-within {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px var(--primary-light);
}

body.dark-mode .quantity-control:focus-within {
    box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.2);
}

/* Quantity Button */
.qty-btn {
    background: var(--bg-light-2);
    border: none;
    color: var(--text-dark);
    width: 35px;
    height: 35px;
    cursor: pointer;
    font-weight: 700;
    font-size: 1.3rem;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
    outline: none;
    flex-shrink: 0;
}

body.dark-mode .qty-btn {
    background: var(--bg-light-2);
}

.qty-btn:hover {
    background: var(--primary-color);
    color: white;
    transform: scale(1.1);
}

.qty-btn:active {
    transform: scale(0.9);
}

.qty-btn:focus {
    box-shadow: inset 0 0 0 2px var(--primary-color);
}

.qty-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.qty-btn i {
    font-size: 1.2rem;
    font-weight: 700;
    display: block;
    line-height: 1;
}

.qty-btn i::before {
    display: inline-block;
}

/* Quantity Input */
.qty-input {
    flex: 1;
    border: none;
    background: transparent;
    text-align: center;
    font-family: inherit;
    font-weight: 600;
    color: var(--text-dark);
    font-size: 1rem;
    outline: none;
    padding: 0 0.5rem;
}

.qty-input::-webkit-outer-spin-button,
.qty-input::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}



/* ==================== PRODUCT ACTIONS ==================== */
.product-actions {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem;
}

/* Button Styles */
.btn {
    padding: 0.75rem;
    border: none;
    border-radius: var(--radius-md);
    font-family: inherit;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
    font-size: 0.95rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    outline: none;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.5);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn:active::before {
    width: 300px;
    height: 300px;
}

/* Sell Button */
.btn-sell {
    background: var(--bg-light-3);
    color: var(--text-dark);
    border: 2px solid var(--border-color);
}

body.dark-mode .btn-sell {
    background: var(--bg-light-3);
    border-color: var(--border-color);
}

.btn-sell:hover:not(:disabled) {
    background: var(--secondary-color);
    color: white;
    border-color: var(--secondary-color);
    transform: scale(1.05);
    box-shadow: 0 4px 12px rgba(245, 158, 11, 0.3);
}

.btn-sell:focus {
    box-shadow: 0 0 0 3px rgba(245, 158, 11, 0.2);
}

/* Buy Button */
.btn-buy {
    background: var(--primary-color);
    color: white;
    border: 2px solid var(--primary-color);
}

.btn-buy:hover:not(:disabled) {
    background: var(--primary-dark);
    border-color: var(--primary-dark);
    transform: scale(1.05);
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3);
}

.btn-buy:focus {
    box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.2);
}

/* Button Icon */
.btn i {
    font-size: 1rem;
    transition: var(--transition-fast);
}

.btn:hover i {
    transform: scale(1.1);
}

/* Disabled State */
.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none !important;
}

/* ==================== TOAST NOTIFICATION ==================== */
.toast {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    padding: 1.2rem 1.8rem;
    background: white;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-xl);
    font-weight: 600;
    z-index: 1000;
    opacity: 0;
    pointer-events: none;
    transition: var(--transition);
    max-width: 400px;
    min-height: 50px;
    display: flex;
    align-items: center;
    line-height: 1.5;
}

body.dark-mode .toast {
    background: var(--bg-light-2);
    color: white;
}

.toast.show {
    opacity: 1;
    pointer-events: auto;
    animation: slideInUp 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

@keyframes slideInUp {
    from {
        transform: translateY(30px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

/* Toast Types */
.toast.success {
    border-left: 4px solid var(--primary-color);
    color: var(--primary-color);
}

body.dark-mode .toast.success {
    color: var(--primary-color);
}

.toast.error {
    border-left: 4px solid var(--danger-color);
    color: var(--danger-color);
}

body.dark-mode .toast.error {
    color: var(--danger-color);
}

.toast.warning {
    border-left: 4px solid var(--secondary-color);
    color: var(--secondary-color);
}

body.dark-mode .toast.warning {
    color: var(--secondary-color);
}

.toast.info {
    border-left: 4px solid var(--info-color);
    color: var(--info-color);
}

body.dark-mode .toast.info {
    color: var(--info-color);
}

/* ==================== FOOTER STYLES ==================== */
.footer {
    background: var(--bg-light-2);
    color: var(--text-dark);
    padding: 3rem 1rem 1rem;
    margin-top: 4rem;
    transition: var(--transition);
}

body.dark-mode .footer {
    background: var(--bg-light-3);
}

.footer-content {
    max-width: 1400px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
    padding: 0 1rem;
}

/* Footer Section */
.footer-section h3 {
    font-size: 1.1rem;
    margin-bottom: 1rem;
    font-weight: 700;
    color: var(--text-dark);
}

.footer-section p {
    color: var(--text-gray);
    font-size: 0.95rem;
    line-height: 1.8;
}

/* Social Links */
.social-links {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.social-icon {
    width: 45px;
    height: 45px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    font-size: 1.2rem;
    transition: var(--transition);
    border: 2px solid var(--border-color);
    color: var(--text-dark);
    text-decoration: none;
    outline: none;
}

body.dark-mode .social-icon {
    border-color: var(--border-color);
}

.social-icon:hover {
    transform: translateY(-5px);
    border-color: currentColor;
}

.social-icon:focus {
    box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.2);
}

/* Instagram */
.social-icon.instagram {
    color: #e1306c;
}

.social-icon.instagram:hover {
    background: linear-gradient(45deg, #f09433 0%, #e6683c 25%, #dc2743 50%, #cc2366 75%, #bc1888 100%);
    color: white;
    border-color: #cc2366;
}

/* YouTube */
.social-icon.youtube {
    color: #ff0000;
}

.social-icon.youtube:hover {
    background: #ff0000;
    color: white;
    border-color: #ff0000;
}

/* Facebook */
.social-icon.facebook {
    color: #1877f2;
}

.social-icon.facebook:hover {
    background: #1877f2;
    color: white;
    border-color: #1877f2;
}

/* Footer Bottom */
.footer-bottom {
    text-align: center;
    padding: 2rem 1rem;
    border-top: 2px solid var(--border-color);
    color: var(--text-gray);
    font-size: 0.9rem;
}

.heart {
    color: var(--danger-color);
    font-size: 1.1rem;
    margin: 0 0.25rem;
    animation: heartBeat 1.5s ease-in-out infinite;
}

@keyframes heartBeat {
    0%, 100% {
        transform: scale(1);
    }
    25% {
        transform: scale(1.3);
    }
    50% {
        transform: scale(1);
    }
}

/* ==================== RESPONSIVE DESIGN ==================== */

/* Large Tablets */
@media (max-width: 1024px) {
    .header-container {
        gap: 1rem;
    }

    .store-name {
        font-size: 1.5rem;
    }

    .money-amount-header {
        font-size: 1.1rem;
        min-width: 150px;
    }

    .products-container {
        grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
        gap: 1.5rem;
    }

    .main-content {
        padding: 2rem 1rem;
    }
}

/* Tablets */
@media (max-width: 768px) {
    :root {
        font-size: 15px;
    }

    .header {
        padding: 0.75rem;
    }

    .header-container {
        flex-wrap: wrap;
        gap: 0.75rem;
        padding: 0;
    }

    .store-name {
        font-size: 1.3rem;
    }

    .money-display-header {
        padding: 0.6rem 1rem;
        flex: 1 1 auto;
        min-width: 180px;
    }

    .money-amount-header {
        font-size: 1rem;
        min-width: 80px;
    }

    .currency-symbol-header {
        font-size: 1.2rem;
    }

    .filter-container {
        grid-template-columns: 1fr;
        gap: 1rem;
        padding: 0;
    }

    .filter-section {
        padding: 1.5rem 0.5rem;
    }

    .products-container {
        grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
        gap: 1rem;
    }

    .product-card {
        padding: 1rem;
    }

    .product-image-container {
        height: 120px;
        margin-bottom: 0.75rem;
    }

    .product-image {
        width: 100px;
        height: 100px;
    }

    .product-name {
        font-size: 1rem;
    }

    .product-price {
        font-size: 1.5rem;
    }

    .product-controls {
        gap: 0.75rem;
    }

    .product-actions {
        grid-template-columns: 1fr;
    }

    .btn {
        font-size: 0.9rem;
        padding: 0.7rem;
    }

    .qty-btn {
        width: 32px;
        height: 32px;
        font-size: 1.2rem;
    }

    .toast {
        right: 1rem;
        left: 1rem;
        bottom: 1rem;
        max-width: 100%;
    }

    .footer-content {
        gap: 1.5rem;
        padding: 0 0.5rem;
    }

    .footer-bottom {
        padding: 1.5rem 0.5rem;
    }

    .main-content {
        padding: 2rem 0.5rem;
    }
}

/* Mobile Devices */
@media (max-width: 480px) {
    :root {
        font-size: 14px;
    }

    .header {
        padding: 0.5rem;
    }

    .header-container {
        gap: 0.5rem;
    }

    .logo-section {
        gap: 0.5rem;
        order: 1;
    }

    .logo-img {
        width: 35px;
        height: 35px;
    }

    .store-name {
        font-size: 1.1rem;
        letter-spacing: 0;
    }

    .money-display-header {
        padding: 0.5rem 0.75rem;
        flex: 1 1 100%;
        order: 3;
        min-width: auto;
    }

    .currency-symbol-header {
        font-size: 1rem;
    }

    .money-amount-header {
        font-size: 0.9rem;
        min-width: auto;
        text-align: right;
    }

    .header-controls {
        order: 2;
    }

    .theme-toggle {
        width: 40px;
        height: 40px;
        font-size: 1rem;
    }

    .filter-section {
        padding: 1rem 0;
    }

    .filter-container {
        gap: 0.75rem;
        padding: 0 0.5rem;
    }

    .search-box {
        padding: 0.6rem 1rem;
    }

    .search-box i {
        margin-right: 0.5rem;
        font-size: 1rem;
    }

    .search-input {
        font-size: 0.9rem;
    }

    .sort-label {
        font-size: 0.9rem;
    }

    .sort-select {
        padding: 0.6rem 0.75rem;
        font-size: 0.9rem;
        padding-right: 2rem;
    }

    .products-container {
        grid-template-columns: 1fr;
        gap: 0.75rem;
    }

    .product-card {
        padding: 0.75rem;
    }

    .product-image-container {
        height: 100px;
        margin-bottom: 0.5rem;
    }

    .product-image {
        width: 80px;
        height: 80px;
    }

    .product-name {
        font-size: 0.95rem;
        margin-bottom: 0.25rem;
    }

    .product-price {
        font-size: 1.3rem;
        margin-bottom: 0.25rem;
    }

    .product-quantity-owned {
        font-size: 0.8rem;
    }

    .product-controls {
        gap: 0.5rem;
        margin-bottom: 0.75rem;
    }

    .quantity-control {
        border-radius: 8px;
    }

    .qty-btn {
        width: 30px;
        height: 30px;
        font-size: 1.1rem;
    }

    .qty-btn i {
        font-size: 1rem;
    }

    .qty-input {
        font-size: 0.9rem;
    }

    .product-actions {
        grid-template-columns: 1fr;
        gap: 0.5rem;
    }

    .btn {
        font-size: 0.85rem;
        padding: 0.6rem;
        gap: 0.25rem;
    }

    .btn i {
        font-size: 0.9rem;
    }

    .toast {
        right: 0.75rem;
        left: 0.75rem;
        bottom: 0.75rem;
        padding: 1rem 1rem;
        font-size: 0.9rem;
        border-radius: 8px;
    }

    .footer-section {
        text-align: center;
    }

    .footer-section h3 {
        font-size: 1rem;
    }

    .footer-section p {
        font-size: 0.9rem;
    }

    .social-links {
        justify-content: center;
    }

    .social-icon {
        width: 40px;
        height: 40px;
        font-size: 1rem;
    }

    .footer-bottom {
        font-size: 0.85rem;
        padding: 1rem 0.5rem;
    }

    .main-content {
        padding: 1rem 0.5rem;
    }
}

/* Small Mobile */
@media (max-width: 360px) {
    :root {
        font-size: 13px;
    }

    .store-name {
        font-size: 1rem;
    }

    .products-container {
        gap: 0.5rem;
    }

    .product-card {
        padding: 0.5rem;
    }

    .product-name {
        font-size: 0.9rem;
    }

    .product-price {
        font-size: 1.2rem;
    }

    .btn {
        font-size: 0.8rem;
        padding: 0.5rem;
    }

    .qty-btn {
        width: 28px;
        height: 28px;
        font-size: 1rem;
    }

    .money-title {
        font-size: 1.1rem;
    }

    .header-container {
        gap: 0.25rem;
    }

    .toast {
        padding: 0.75rem;
    }
}

/* ==================== ANIMATIONS ==================== */

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

@keyframes bounce {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-10px);
    }
}

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

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

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ==================== UTILITY CLASSES ==================== */

.hidden {
    display: none !important;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

.text-center {
    text-align: center;
}

.text-right {
    text-align: right;
}

.text-left {
    text-align: left;
}

.mt-1 {
    margin-top: 0.5rem;
}

.mt-2 {
    margin-top: 1rem;
}

.mt-3 {
    margin-top: 1.5rem;
}

.mt-4 {
    margin-top: 2rem;
}

.mb-1 {
    margin-bottom: 0.5rem;
}

.mb-2 {
    margin-bottom: 1rem;
}

.mb-3 {
    margin-bottom: 1.5rem;
}

.mb-4 {
    margin-bottom: 2rem;
}

.p-1 {
    padding: 0.5rem;
}

.p-2 {
    padding: 1rem;
}

.p-3 {
    padding: 1.5rem;
}

.p-4 {
    padding: 2rem;
}

/* ==================== PRINT STYLES ==================== */

@media print {
    .header,
    .filter-section,
    .footer,
    .btn {
        display: none;
    }

    body {
        background: white;
        color: black;
    }

    .product-card {
        page-break-inside: avoid;
        box-shadow: none;
        border: 1px solid #ccc;
    }
}

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

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

/* ==================== HIGH CONTRAST MODE ==================== */

@media (prefers-contrast: more) {
    :root {
        --shadow-md: 0 2px 4px 0 rgba(0, 0, 0, 0.3);
        --shadow-lg: 0 4px 8px 0 rgba(0, 0, 0, 0.3);
    }

    .btn-sell,
    .btn-buy {
        border-width: 3px;
    }

    .product-card {
        border-width: 2px;
    }
}

/* ==================== FOCUS VISIBLE ==================== */

.btn:focus-visible,
.sort-select:focus-visible,
.search-input:focus-visible,
.qty-input:focus-visible,
.social-icon:focus-visible,
.theme-toggle:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* ==================== SMOOTH SCROLLING ==================== */

html {
    scroll-behavior: smooth;
}

/* ==================== SELECTION COLORS ==================== */

::selection {
    background-color: var(--primary-color);
    color: white;
}

body.dark-mode ::selection {
    background-color: var(--primary-color);
    color: white;
}