:root {
    --primary: #2563eb;
    --primary-hover: #1d4ed8;
    --secondary: #1e293b;
    --bg-color: #f8fafc;
    --surface: #ffffff;
    --text-main: #0f172a;
    --text-muted: #64748b;
    --accent: #10b981;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-main);
    line-height: 1.6;
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Outfit', sans-serif;
    font-weight: 700;
    color: var(--secondary);
}

a {
    text-decoration: none;
    color: inherit;
    transition: color 0.3s ease;
}

/* Navbar */
.navbar {
    position: sticky;
    top: 0;
    background: #000000;
    backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(255,255,255,0.1);
    z-index: 1000;
    box-shadow: var(--shadow-sm);
}

.nav-container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.brand {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo {
    height: 48px;
    width: auto;
    object-fit: contain;
}

.brand-text {
    font-family: 'Outfit', sans-serif;
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: 1px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.nav-links {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.nav-links > a, .dropbtn {
    font-weight: 600;
    font-size: 0.95rem;
    color: #ffffff;
    position: relative;
}

.nav-links > a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -4px;
    left: 0;
    background-color: gray;
    transition: width 0.3s ease;
}

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

.nav-links > a:hover, .dropbtn:hover {
    color: gray;
}

/* Dropdown */
.dropdown {
    position: relative;
    display: inline-block;
}

.dropdown-content {
    visibility: hidden;
    opacity: 0;
    position: absolute;
    background-color: var(--surface);
    min-width: 220px;
    box-shadow: var(--shadow-lg);
    border-radius: 8px;
    top: 150%;
    left: 50%;
    transform: translateX(-50%) translateY(-10px);
    z-index: 1;
    padding: 0.5rem 0;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.dropdown:hover .dropdown-content {
    visibility: visible;
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

.dropdown-content a {
    color: var(--text-main);
    padding: 0.75rem 1.5rem;
    display: block;
    font-size: 0.9rem;
    font-weight: 500;
    transition: background 0.2s;
}

.dropdown-content a:hover {
    background-color: var(--bg-color);
    color: var(--primary);
}

.mobile-menu-btn {
    display: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: #ffffff;
}

/* Main Content Area */
#app-content {
    min-height: calc(100vh - 200px);
    padding: 2rem 0;
    animation: fadeIn 0.5s ease-out;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Page Containers */
.page-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

/* Hero Section */
.hero {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 6rem 2rem;
    background: linear-gradient(180deg, var(--surface) 0%, var(--bg-color) 100%);
    border-radius: 24px;
    margin-bottom: 3rem;
    box-shadow: var(--shadow-sm);
}

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

.hero p {
    font-size: 1.25rem;
    color: var(--text-muted);
    max-width: 600px;
    margin-bottom: 2rem;
}

.btn {
    display: inline-block;
    background-color: var(--primary);
    color: white;
    padding: 1rem 2.5rem;
    border-radius: 999px;
    font-weight: 600;
    font-size: 1.1rem;
    box-shadow: var(--shadow-md);
    transition: transform 0.2s, background-color 0.2s, box-shadow 0.2s;
}

.btn:hover {
    background-color: var(--primary-hover);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

/* Grid Layouts */
.grid-cards {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.card {
    background: var(--surface);
    border-radius: 16px;
    padding: 2rem;
    box-shadow: var(--shadow-md);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: 1px solid rgba(0,0,0,0.03);
    cursor: pointer;
}

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

.card h3 {
    margin-bottom: 1rem;
    font-size: 1.4rem;
}

/* Product Category Page */
.category-header {
    text-align: center;
    margin-bottom: 3rem;
}

.product-hero-image {
    width: 100%;
    max-height: 600px;
    object-fit: cover;
    border-radius: 24px;
    margin-bottom: 3rem;
    box-shadow: var(--shadow-lg);
}

.category-header h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.category-content {
    background: var(--surface);
    padding: 3rem;
    border-radius: 24px;
    box-shadow: var(--shadow-md);
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--text-main);
    margin-bottom: 3rem;
}

/* Forms */
.contact-form {
    background: var(--surface);
    padding: 3rem;
    border-radius: 16px;
    box-shadow: var(--shadow-md);
    max-width: 600px;
    margin: 0 auto;
}

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

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--secondary);
}

.form-control {
    width: 100%;
    padding: 0.8rem 1rem;
    border: 1px solid #cbd5e1;
    border-radius: 8px;
    font-family: inherit;
    font-size: 1rem;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

/* Footer */
.footer {
    background: var(--surface);
    border-top: 1px solid rgba(0,0,0,0.05);
    padding: 4rem 2rem 1rem;
    margin-top: 4rem;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-brand h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.footer-links h4, .footer-contact h4 {
    margin-bottom: 1.2rem;
    font-size: 1.2rem;
}

.footer-links a {
    display: block;
    color: var(--text-muted);
    margin-bottom: 0.8rem;
}

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

.footer-contact p {
    color: var(--text-muted);
    margin-bottom: 0.5rem;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(0,0,0,0.05);
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* Responsive */
@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    .mobile-menu-btn {
        display: block;
    }
    .hero h1 {
        font-size: 2.5rem;
    }
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
    margin-bottom: 3rem;
}

.product-item {
    background: var(--surface);
    border-radius: 16px;
    padding: 1rem;
    box-shadow: var(--shadow-sm);
    text-align: center;
    transition: transform 0.3s ease;
}


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

.product-item img {
    width: 100%;
    height: 400px;
    object-fit: cover;
    border-radius: 12px;
    margin-bottom: 1rem;
}

@media (max-width: 768px) {
    .product-grid {
        grid-template-columns: 1fr;
    }
    .home-banner, .css-slider {
        height: 250px !important;
    }
}

.testimonial-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 1.5rem;
}

.testimonial-img {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    object-fit: cover;
    border: 3px solid var(--primary);
    box-shadow: var(--shadow-sm);
}

.testimonial-content p {
    font-style: italic;
    color: var(--text-muted);
    margin-bottom: 1rem;
}

.testimonial-content strong {
    color: var(--secondary);
    font-size: 1.1rem;
}

/* Interactive JS Slider */
.interactive-slider {
    position: relative;
    width: 100%;
    height: 500px;
    border-radius: 24px;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    background: #000;
}

.slide {
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    opacity: 0;
    transition: opacity 0.8s ease-in-out;
}

.slide.active {
    opacity: 1;
    z-index: 10;
}

.slide img {
    width: 100%; height: 100%;
    object-fit: cover;
}

.slide-content {
    position: absolute;
    top: 50%; left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    color: white;
    z-index: 20;
    pointer-events: none;
    text-shadow: 0 4px 10px rgba(0,0,0,0.7);
    width: 80%;
}

.slide-content h1 {
    font-size: 3.5rem;
    margin-bottom: 1rem;
    color: #fff;
}

.slide-content p {
    font-size: 1.5rem;
    font-weight: 300;
}

.slider-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(255, 255, 255, 0.2);
    border: none;
    color: white;
    width: 50px;
    height: 50px;
    cursor: pointer;
    z-index: 30;
    font-size: 1.5rem;
    border-radius: 50%;
    backdrop-filter: blur(5px);
    transition: background 0.3s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.slider-btn:hover {
    background: rgba(255, 255, 255, 0.5);
}

.slider-btn.prev { left: 20px; }
.slider-btn.next { right: 20px; }

.slider-dots {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 30;
    display: flex;
    gap: 10px;
}

.dot {
    width: 12px; height: 12px;
    border-radius: 50%;
    background: rgba(255,255,255,0.4);
    cursor: pointer;
    transition: background 0.3s;
}

.dot.active, .dot:hover {
    background: #fff;
}