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

:root {
    --black: #000000;
    --white: #ffffff;
    --gray-100: #f8f9fa;
    --gray-200: #e9ecef;
    --gray-300: #dee2e6;
    --gray-400: #ced4da;
    --gray-600: #6c757d;
    --gray-800: #343a40;
    --gray-900: #212529;
    --primary: #4A90E2;
    --gradient-1: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.12);
    --shadow-xl: 0 16px 64px rgba(0, 0, 0, 0.16);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: var(--gray-900);
    background: var(--white);
    overflow-x: hidden;
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--gray-200);
    z-index: 1000;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.header.scrolled {
    box-shadow: var(--shadow-md);
}

.header-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: 1.2rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: -1px;
    color: var(--black);
    cursor: pointer;
    display: flex;
    align-items: center;
}

.nav {
    display: flex;
    gap: 2.5rem;
    align-items: center;
}

.nav a {
    color: var(--gray-800);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    letter-spacing: 0.2px;
    position: relative;
    transition: color 0.3s ease;
}

.nav a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: width 0.3s ease;
}

.nav a:hover {
    color: var(--primary);
}

.nav a:hover::after {
    width: 100%;
}

.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
}

.menu-toggle span {
    width: 25px;
    height: 2px;
    background: var(--black);
    transition: all 0.3s ease;
}

/* Hero Section */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background-image: linear-gradient(rgba(102, 126, 234, 0.7), rgba(118, 75, 162, 0.7)), url('/images/hero-bg.jpg');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    overflow: hidden;
    margin-top: 70px;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: radial-gradient(circle at 20% 80%, rgba(255, 255, 255, 0.1) 0%, transparent 50%),
                      radial-gradient(circle at 80% 20%, rgba(255, 255, 255, 0.1) 0%, transparent 50%);
    animation: moveBackground 20s ease-in-out infinite;
}


@keyframes moveBackground {
    0%, 100% { transform: translate(0, 0); }
    50% { transform: translate(20px, 20px); }
}

.hero-content {
    max-width: 900px;
    text-align: center;
    padding: 0 2rem;
    position: relative;
    z-index: 2;
}

.hero-title {
    font-size: clamp(3rem, 8vw, 6rem);
    font-weight: 900;
    color: var(--white);
    margin-bottom: 1rem;
    letter-spacing: -3px;
    line-height: 1;
}

.hero-tagline {
    font-size: clamp(1.5rem, 3vw, 2.2rem);
    font-weight: 300;
    color: rgba(255, 255, 255, 0.95);
    margin-bottom: 1rem;
    font-style: italic;
}

.hero-subtitle {
    font-size: clamp(1rem, 2vw, 1.2rem);
    font-weight: 400;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 3rem;
}

.hero-cta {
    display: inline-block;
    background: var(--white);
    color: var(--gray-900);
    padding: 1.2rem 3.5rem;
    border-radius: 100px;
    font-weight: 700;
    font-size: 1rem;
    text-decoration: none;
    letter-spacing: 0.5px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
}

.hero-cta:hover {
    transform: translateY(-3px) scale(1.05);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

.scroll-indicator {
    position: absolute;
    bottom: 3rem;
    left: 50%;
    transform: translateX(-50%);
}

.scroll-indicator span {
    display: block;
    width: 2px;
    height: 40px;
    background: rgba(255, 255, 255, 0.5);
    animation: scrollAnimation 2s ease-in-out infinite;
}

@keyframes scrollAnimation {
    0%, 100% { opacity: 0; transform: translateY(0); }
    50% { opacity: 1; transform: translateY(20px); }
}

/* Stats */
.stats-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 2rem;
}

.stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: -5rem;
    position: relative;
    z-index: 10;
}

.stat-card {
    background: var(--white);
    padding: 3rem 2rem;
    border-radius: 20px;
    text-align: center;
    box-shadow: var(--shadow-lg);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.stat-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
}

.stat-number {
    font-size: 3.5rem;
    font-weight: 900;
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.5rem;
    line-height: 1;
}

.stat-label {
    font-size: 1rem;
    color: var(--gray-600);
    font-weight: 600;
    letter-spacing: 0.5px;
}

/* Container */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 8rem 2rem;
}

.section-header {
    text-align: center;
    margin-bottom: 5rem;
}

.section-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 900;
    color: var(--gray-900);
    margin-bottom: 1.5rem;
    letter-spacing: -2px;
}

.section-subtitle {
    font-size: clamp(1rem, 2vw, 1.2rem);
    color: var(--gray-600);
    max-width: 700px;
    margin: 0 auto;
    line-height: 1.8;
}

/* Products Grid */
.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 2.5rem;
}

.loading {
    grid-column: 1 / -1;
    text-align: center;
    padding: 4rem;
    color: var(--gray-600);
    font-size: 1.2rem;
}

.product-card {
    background: var(--white);
    border-radius: 24px;
    overflow: hidden;
    border: 1px solid var(--gray-200);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    cursor: pointer;
}

.product-card:hover {
    transform: translateY(-12px);
    box-shadow: var(--shadow-xl);
    border-color: var(--gray-300);
}

.product-image {
    width: 100%;
    height: 360px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 6rem;
    position: relative;
    overflow: hidden;
    transition: transform 0.4s ease;
}

.product-card:hover .product-image {
    transform: scale(1.05);
}

.product-badge {
    position: absolute;
    top: 1.5rem;
    right: 1.5rem;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    padding: 0.5rem 1.2rem;
    border-radius: 100px;
    font-size: 0.7rem;
    font-weight: 700;
    color: var(--gray-900);
    letter-spacing: 1px;
    box-shadow: var(--shadow-md);
}

.product-info {
    padding: 2rem;
}

.product-category {
    font-size: 0.75rem;
    color: var(--primary);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    margin-bottom: 0.8rem;
}

.product-name {
    font-size: 1.6rem;
    font-weight: 800;
    color: var(--gray-900);
    margin-bottom: 1rem;
    letter-spacing: -0.5px;
}

.product-description {
    color: var(--gray-600);
    margin-bottom: 1.5rem;
    font-size: 0.95rem;
    line-height: 1.7;
}

.product-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 1.5rem;
    border-top: 1px solid var(--gray-200);
}

.product-price {
    font-size: 2rem;
    color: var(--gray-900);
    font-weight: 900;
}

.btn {
    background: var(--black);
    color: var(--white);
    padding: 1rem 2.5rem;
    border: none;
    border-radius: 100px;
    font-size: 0.9rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    letter-spacing: 0.5px;
}

.btn:hover {
    transform: scale(1.08);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
}

/* About Section */
.about {
    background: var(--gray-100);
    padding: 8rem 2rem;
}

.about-content {
    max-width: 1400px;
    margin: 0 auto;
}

.about-text {
    font-size: 1.3rem;
    color: var(--gray-700);
    margin-bottom: 2rem;
    line-height: 1.9;
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
    text-align: center;
}

.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2.5rem;
    margin-top: 5rem;
}

.feature {
    background: var(--white);
    padding: 3rem 2.5rem;
    border-radius: 20px;
    text-align: center;
    border: 1px solid var(--gray-200);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.feature:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: var(--gray-300);
}

.feature-icon {
    font-size: 4rem;
    margin-bottom: 1.5rem;
    display: block;
}

.feature h3 {
    color: var(--gray-900);
    margin-bottom: 1rem;
    font-size: 1.4rem;
    font-weight: 800;
    letter-spacing: -0.5px;
}

.feature p {
    color: var(--gray-600);
    line-height: 1.8;
    font-size: 0.95rem;
}

/* Footer */
.footer {
    background: var(--black);
    color: var(--white);
    padding: 5rem 2rem 2rem;
}

.footer-content {
    max-width: 1400px;
    margin: 0 auto;
    text-align: center;
}

.footer-brand h3 {
    font-size: 2rem;
    margin-bottom: 1rem;
    font-weight: 900;
}

.footer-brand p {
    color: var(--gray-400);
    margin-bottom: 3rem;
    font-size: 1rem;
}

.footer-info {
    margin-bottom: 3rem;
}

.footer-info p {
    margin-bottom: 0.8rem;
    color: var(--gray-400);
    font-size: 0.95rem;
}

.footer-bottom {
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom p {
    margin-bottom: 0.5rem;
    color: var(--gray-400);
    font-size: 0.85rem;
}

.footer-tech {
    opacity: 0.6;
    font-size: 0.8rem;
}

/* Animations */
.fade-in {
    animation: fadeIn 1s ease-out;
}

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

.fade-in-up {
    opacity: 0;
    animation: fadeInUp 0.8s ease-out forwards;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(40px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Responsive */
@media (max-width: 768px) {
    .nav {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--white);
        flex-direction: column;
        gap: 0;
        border-bottom: 1px solid var(--gray-200);
        box-shadow: var(--shadow-md);
    }

    .nav.active {
        display: flex;
    }

    .nav a {
        padding: 1.2rem 2rem;
        border-top: 1px solid var(--gray-200);
        width: 100%;
    }

    .menu-toggle {
        display: flex;
    }

    .stats {
        grid-template-columns: 1fr;
        gap: 1.5rem;
        margin-top: 3rem;
    }

    .products-grid {
        grid-template-columns: 1fr;
    }

    .container {
        padding: 5rem 1.5rem;
    }

    .about {
        padding: 5rem 1.5rem;
    }
}