:root {
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --secondary: #10b981;
    --accent: #f59e0b;
    --dark: #0f172a;
    --darker: #020617;
    --light: #f8fafc;
    --gray: #64748b;
    --gray-light: #e2e8f0;
    --gray-dark: #334155;
    --danger: #ef4444;
    --success: #10b981;
    --warning: #f59e0b;
    --info: #3b82f6;
    
    --bg-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --card-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --hover-shadow: 0 25px 30px -12px rgba(0, 0, 0, 0.25);
    
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', sans-serif;
    background: var(--light);
    color: var(--dark);
    line-height: 1.6;
    transition: var(--transition);
}

body.dark {
    --light: #0f172a;
    --dark: #f8fafc;
    --gray-light: #334155;
    background: var(--light);
    color: var(--dark);
}

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    z-index: 1000;
    transition: var(--transition);
}

.dark .navbar {
    background: rgba(15, 23, 42, 0.95);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.5rem;
    font-weight: 800;
    background: var(--bg-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.logo i {
    font-size: 2rem;
    -webkit-text-fill-color: var(--primary);
}

.nav-links {
    display: flex;
    gap: 2rem;
    list-style: none;
}

.nav-links a {
    text-decoration: none;
    color: var(--gray);
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    border-radius: 0.5rem;
    transition: var(--transition);
}

.nav-links a i {
    font-size: 1.1rem;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--primary);
    background: rgba(99, 102, 241, 0.1);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.theme-toggle {
    width: 40px;
    height: 40px;
    border: none;
    border-radius: 50%;
    background: var(--gray-light);
    color: var(--gray);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.theme-toggle:hover {
    background: var(--primary);
    color: white;
    transform: rotate(180deg);
}

.cart-icon {
    position: relative;
    cursor: pointer;
    font-size: 1.2rem;
    color: var(--gray);
    transition: var(--transition);
}

.cart-icon:hover {
    color: var(--primary);
}

.cart-count {
    position: absolute;
    top: -8px;
    right: -8px;
    background: var(--danger);
    color: white;
    font-size: 0.7rem;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.login-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.6rem 1.2rem;
    background: var(--bg-gradient);
    color: white;
    text-decoration: none;
    border-radius: 0.5rem;
    font-weight: 500;
    transition: var(--transition);
}

.login-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--card-shadow);
}

.mobile-menu {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--gray);
    cursor: pointer;
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: center;
    gap: 4rem;
    max-width: 1400px;
    margin: 0 auto;
    padding: 6rem 2rem 4rem;
}

.hero-content {
    animation: fadeInUp 1s ease;
}

.hero-badge {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: rgba(99, 102, 241, 0.1);
    color: var(--primary);
    border-radius: 2rem;
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
}

.hero-content h1 {
    font-size: 3.5rem;
    line-height: 1.2;
    margin-bottom: 1.5rem;
    font-weight: 800;
}

.gradient-text {
    background: var(--bg-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-content p {
    font-size: 1.2rem;
    color: var(--gray);
    margin-bottom: 2rem;
    max-width: 500px;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.8rem 1.8rem;
    border-radius: 0.5rem;
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
    cursor: pointer;
    border: none;
    font-size: 1rem;
}

.btn-primary {
    background: var(--bg-gradient);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--card-shadow);
}

.btn-outline {
    background: transparent;
    color: var(--dark);
    border: 2px solid var(--gray-light);
}

.btn-outline:hover {
    border-color: var(--primary);
    color: var(--primary);
    transform: translateY(-2px);
}

.hero-image {
    position: relative;
    animation: fadeInRight 1s ease;
}

.hero-image img {
    width: 100%;
    border-radius: 2rem;
    box-shadow: var(--card-shadow);
}

.floating-card {
    position: absolute;
    background: white;
    padding: 0.8rem 1.2rem;
    border-radius: 2rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    box-shadow: var(--card-shadow);
    animation: float 3s ease-in-out infinite;
}

.dark .floating-card {
    background: var(--gray-dark);
}

.floating-card i {
    color: var(--primary);
}

.card-1 {
    top: 20%;
    left: -10%;
    animation-delay: 0s;
}

.card-2 {
    bottom: 20%;
    right: -10%;
    animation-delay: 1s;
}

/* Features Section */
.features {
    padding: 4rem 2rem;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.1) 0%, rgba(124, 58, 237, 0.1) 100%);
}

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

.feature-card {
    background: white;
    padding: 2rem;
    border-radius: 1rem;
    text-align: center;
    transition: var(--transition);
    box-shadow: var(--card-shadow);
}

.dark .feature-card {
    background: var(--gray-dark);
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--hover-shadow);
}

.feature-icon {
    width: 60px;
    height: 60px;
    background: var(--bg-gradient);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
}

.feature-icon i {
    font-size: 1.5rem;
    color: white;
}

.feature-card h3 {
    margin-bottom: 0.5rem;
}

.feature-card p {
    color: var(--gray);
}

/* Products Section */
.products {
    max-width: 1400px;
    margin: 4rem auto;
    padding: 2rem;
}

.section-header {
    text-align: center;
    margin-bottom: 3rem;
}

.section-subtitle {
    display: inline-block;
    padding: 0.3rem 1rem;
    background: rgba(99, 102, 241, 0.1);
    color: var(--primary);
    border-radius: 2rem;
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.section-title {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.product-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.product-card {
    background: white;
    border-radius: 1rem;
    overflow: hidden;
    box-shadow: var(--card-shadow);
    transition: var(--transition);
    position: relative;
}

.dark .product-card {
    background: var(--gray-dark);
}

.product-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--hover-shadow);
}

.product-image {
    position: relative;
    height: 200px;
    overflow: hidden;
}

.product-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.product-card:hover .product-image img {
    transform: scale(1.1);
}

.product-badge {
    position: absolute;
    top: 1rem;
    left: 1rem;
    background: var(--danger);
    color: white;
    padding: 0.3rem 0.8rem;
    border-radius: 2rem;
    font-size: 0.8rem;
    font-weight: 600;
}

.product-wishlist {
    position: absolute;
    top: 1rem;
    right: 1rem;
    width: 35px;
    height: 35px;
    border-radius: 50%;
    background: white;
    border: none;
    color: var(--gray);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

.product-wishlist:hover {
    background: var(--danger);
    color: white;
    transform: scale(1.1);
}

.product-wishlist.active {
    background: var(--danger);
    color: white;
}

.product-info {
    padding: 1.5rem;
}

.product-category {
    color: var(--primary);
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    margin-bottom: 0.5rem;
    display: block;
}

.product-info h3 {
    margin-bottom: 0.5rem;
    font-size: 1.1rem;
}

.product-rating {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
}

.stars {
    color: #fbbf24;
}

.rating-count {
    color: var(--gray);
    font-size: 0.9rem;
}

.product-price {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
}

.current-price {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary);
}

.old-price {
    font-size: 0.9rem;
    color: var(--gray);
    text-decoration: line-through;
}

.add-to-cart {
    width: 100%;
    padding: 0.8rem;
    background: var(--bg-gradient);
    color: white;
    border: none;
    border-radius: 0.5rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    transition: var(--transition);
}

.add-to-cart:hover {
    transform: translateY(-2px);
    box-shadow: var(--card-shadow);
}

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

/* Newsletter Section */
.newsletter {
    padding: 4rem 2rem;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.newsletter-container {
    max-width: 600px;
    margin: 0 auto;
    background: white;
    border-radius: 1rem;
    padding: 3rem;
    text-align: center;
    box-shadow: var(--card-shadow);
}

.dark .newsletter-container {
    background: var(--gray-dark);
}

.newsletter-content h2 {
    margin-bottom: 1rem;
}

.newsletter-content p {
    color: var(--gray);
    margin-bottom: 2rem;
}

.newsletter-form {
    display: flex;
    gap: 1rem;
}

.newsletter-form input {
    flex: 1;
    padding: 0.8rem 1rem;
    border: 2px solid var(--gray-light);
    border-radius: 0.5rem;
    font-size: 1rem;
    transition: var(--transition);
}

.newsletter-form input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

/* Contact Section */
.contact {
    max-width: 1400px;
    margin: 4rem auto;
    padding: 2rem;
}

.contact-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    margin-top: 3rem;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.info-card {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    padding: 2rem;
    background: white;
    border-radius: 1rem;
    box-shadow: var(--card-shadow);
    transition: var(--transition);
}

.dark .info-card {
    background: var(--gray-dark);
}

.info-card:hover {
    transform: translateX(5px);
    box-shadow: var(--hover-shadow);
}

.info-card i {
    font-size: 1.5rem;
    color: var(--primary);
}

.info-card h3 {
    margin-bottom: 0.3rem;
}

.info-card p {
    color: var(--gray);
}

.contact-form {
    background: white;
    padding: 2rem;
    border-radius: 1rem;
    box-shadow: var(--card-shadow);
}

.dark .contact-form {
    background: var(--gray-dark);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.input-group {
    margin-bottom: 1.5rem;
}

.input-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--gray);
    font-weight: 500;
}

.input-group label i {
    color: var(--primary);
    margin-right: 0.5rem;
}

.input-group input,
.input-group textarea {
    width: 100%;
    padding: 0.8rem 1rem;
    border: 2px solid var(--gray-light);
    border-radius: 0.5rem;
    font-size: 1rem;
    transition: var(--transition);
    background: transparent;
    color: var(--dark);
}

.input-group input:focus,
.input-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

/* Footer */
.footer {
    background: var(--darker);
    color: white;
    padding-top: 4rem;
    margin-top: 4rem;
}

.footer-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 2rem;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 3rem;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.5rem;
    font-weight: 800;
    margin-bottom: 1rem;
}

.footer-logo i {
    color: var(--primary);
}

.footer-col p {
    color: #94a3b8;
    margin-bottom: 1.5rem;
}

.social-links {
    display: flex;
    gap: 1rem;
}

.social-links a {
    width: 35px;
    height: 35px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    transition: var(--transition);
}

.social-links a:hover {
    background: var(--primary);
    transform: translateY(-3px);
}

.footer-col h3 {
    margin-bottom: 1.5rem;
    color: white;
}

.footer-col ul {
    list-style: none;
}

.footer-col ul li {
    margin-bottom: 0.8rem;
}

.footer-col ul li a {
    color: #94a3b8;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: var(--transition);
}

.footer-col ul li a i {
    font-size: 0.8rem;
}

.footer-col ul li a:hover {
    color: var(--primary);
    transform: translateX(5px);
}

.app-buttons {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.app-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.6rem 1rem;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 0.5rem;
    color: white;
    text-decoration: none;
    transition: var(--transition);
}

.app-btn:hover {
    background: var(--primary);
    transform: translateY(-2px);
}

.footer-bottom {
    text-align: center;
    padding: 2rem;
    margin-top: 4rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: #94a3b8;
}

/* Cart Sidebar */
.cart-sidebar {
    position: fixed;
    top: 0;
    right: -400px;
    width: 400px;
    height: 100vh;
    background: white;
    box-shadow: -5px 0 25px rgba(0, 0, 0, 0.1);
    z-index: 2000;
    display: flex;
    flex-direction: column;
    transition: var(--transition);
}

.dark .cart-sidebar {
    background: var(--dark);
}

.cart-sidebar.open {
    right: 0;
}

.cart-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--gray-light);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.close-cart {
    background: none;
    border: none;
    font-size: 1.2rem;
    cursor: pointer;
    color: var(--gray);
    transition: var(--transition);
}

.close-cart:hover {
    color: var(--danger);
    transform: rotate(90deg);
}

.cart-items {
    flex: 1;
    overflow-y: auto;
    padding: 1.5rem;
}

.cart-footer {
    padding: 1.5rem;
    border-top: 1px solid var(--gray-light);
}

.cart-total {
    display: flex;
    justify-content: space-between;
    font-weight: 700;
    margin-bottom: 1rem;
}

.checkout-btn {
    width: 100%;
}

/* Back to Top Button */
.back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 45px;
    height: 45px;
    background: var(--bg-gradient);
    border: none;
    border-radius: 50%;
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 100;
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    transform: translateY(-5px);
    box-shadow: var(--card-shadow);
}

/* Toast Notification */
.toast {
    position: fixed;
    bottom: 2rem;
    left: 2rem;
    background: white;
    padding: 1rem 1.5rem;
    border-radius: 0.5rem;
    box-shadow: var(--hover-shadow);
    display: flex;
    align-items: center;
    gap: 0.75rem;
    transform: translateX(-400px);
    transition: var(--transition);
    z-index: 3000;
}

.dark .toast {
    background: var(--gray-dark);
}

.toast.show {
    transform: translateX(0);
}

.toast i {
    color: var(--success);
    font-size: 1.25rem;
}

/* Loading Spinner */
.loading-spinner {
    width: 50px;
    height: 50px;
    border: 3px solid var(--gray-light);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 2rem auto;
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

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

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

/* Responsive Design */
@media (max-width: 1200px) {
    .hero-content h1 {
        font-size: 3rem;
    }
}

@media (max-width: 992px) {
    .hero {
        grid-template-columns: 1fr;
        text-align: center;
        padding-top: 8rem;
    }
    
    .hero-content p {
        margin: 0 auto 2rem;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .contact-container {
        grid-template-columns: 1fr;
    }
    
    .floating-card {
        display: none;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .mobile-menu {
        display: block;
    }
    
    .hero-content h1 {
        font-size: 2.5rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .cart-sidebar {
        width: 100%;
    }
    
    .newsletter-form {
        flex-direction: column;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .hero-content h1 {
        font-size: 2rem;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
        justify-content: center;
    }
    
    .nav-actions .login-btn span {
        display: none;
    }
}