/* --- Design System --- */
:root {
    /* Colors */
    --bg-primary: #020617;
    --bg-secondary: #0f172a;
    --bg-accent: #1e293b;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --accent-blue: #0ea5e9;
    --accent-electric: #00d4ff;
    --accent-green: #22c55e;
    --accent-glow: rgba(14, 165, 233, 0.5);
    
    /* Spacing */
    --space-xs: 0.5rem;
    --space-s: 1rem;
    --space-m: 2rem;
    --space-l: 4rem;
    --space-xl: 8rem;
    
    /* Shadows & Effects */
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.5);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.5);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.5);
    --glass-bg: rgba(15, 23, 42, 0.7);
    --glass-border: rgba(255, 255, 255, 0.1);
    
    /* Typography */
    --font-heading: 'Outfit', sans-serif;
    --font-body: 'Inter', sans-serif;
}

/* --- Reset & Base --- */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    scroll-behavior: smooth;
}

body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-family: var(--font-body);
    line-height: 1.6;
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

ul { list-style: none; }
a { text-decoration: none; color: inherit; transition: 0.3s ease; }
img { max-width: 100%; display: block; height: auto; }

/* --- Layout Utils --- */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

.flex { display: flex; }
.grid { display: grid; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.justify-center { justify-content: center; }
.text-center { text-align: center; }

/* --- Buttons & Inputs --- */
.btn {
    display: inline-block;
    padding: 0.8rem 2rem;
    border-radius: 50px;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    text-transform: uppercase;
    font-size: 0.9rem;
    letter-spacing: 0.05em;
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-electric));
    color: white;
    box-shadow: 0 4px 15px var(--accent-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px var(--accent-glow);
}

.btn-outline {
    background: transparent;
    border: 1px solid var(--accent-blue);
    color: var(--accent-blue);
}

.btn-outline:hover {
    background: var(--accent-blue);
    color: white;
}

/* --- Header & Nav --- */
header#header {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    transition: all 0.4s ease;
    padding: 1.5rem 0;
}

header#header.scrolled {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    padding: 1rem 0;
    border-bottom: 1px solid var(--glass-border);
}

.nav-links {
    display: flex;
    gap: 2.5rem;
}

.nav-links a {
    font-weight: 500;
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.nav-links a:hover, .nav-links a.active {
    color: var(--accent-electric);
}

.logo {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 800;
    background: linear-gradient(to right, #fff, var(--accent-electric));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* --- Hero Slideshow --- */
.hero {
    height: 70vh;
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
}

.slides-container {
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    z-index: 0;
}

.slide {
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background-size: cover;
    background-position: center;
    opacity: 0;
    transition: opacity 1.5s ease-in-out;
    z-index: 0;
}

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

.hero::after {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: linear-gradient(to right, rgba(2, 6, 23, 0.9) 30%, rgba(2, 6, 23, 0.4) 100%);
    z-index: 2;
}

.hero-content {
    position: relative;
    z-index: 10;
    max-width: 650px;
    background: rgba(15, 23, 42, 0.3);
    backdrop-filter: blur(8px);
    padding: 3rem;
    border-radius: 30px;
    border: 1px solid var(--glass-border);
}

.hero h1 {
    font-size: clamp(2rem, 5vw, 3.5rem);
    margin-bottom: 1rem;
    background: linear-gradient(to right, #fff, var(--accent-electric));
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero p {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

/* --- Category Grid --- */
.section-title {
    margin-bottom: 3rem;
}

.section-title h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.category-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.cat-card {
    background: var(--bg-secondary);
    border-radius: 20px;
    padding: 2.5rem;
    border: 1px solid var(--glass-border);
    transition: all 0.4s ease;
    text-align: center;
}

.cat-card:hover {
    transform: translateY(-10px);
    border-color: var(--accent-blue);
    background: var(--bg-accent);
}

.cat-icon {
    font-size: 3rem;
    margin-bottom: 1.5rem;
    color: var(--accent-electric);
}

/* --- Product Grid --- */
.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 2rem;
}

.product-card {
    background: var(--bg-secondary);
    border-radius: 15px;
    overflow: hidden;
    border: 1px solid var(--glass-border);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    flex-direction: column;
}

.product-card:hover {
    transform: translateY(-8px);
    border-color: var(--accent-blue);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5), 0 0 10px var(--accent-glow);
}

.product-img {
    height: 220px;
    background: #1e293b;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1.5rem;
    position: relative;
    overflow: hidden;
}

.product-img::after {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: radial-gradient(circle at center, rgba(14, 165, 233, 0.1), transparent 70%);
}

.product-img img {
    max-height: 100%;
    position: relative;
    z-index: 2;
    transition: transform 0.5s ease;
}

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

.product-info {
    padding: 1.5rem;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.product-info h3 {
    margin-bottom: 0.5rem;
    font-size: 1.25rem;
}

.product-info p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 1.5rem;
    flex-grow: 1;
}

.amazon-btn {
    margin-top: auto;
    width: 100%;
    text-align: center;
    background: #f39c12;
    color: #111;
    padding: 0.8rem;
    border-radius: 8px;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: 0.3s;
}

.amazon-btn:hover {
    background: #e67e22;
    transform: scale(1.02);
}

/* --- Benefits --- */
.benefits-section {
    padding: var(--space-xl) 0;
    background: var(--bg-secondary);
}

.benefit-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 3rem;
}

.benefit-item h3 {
    margin: 1.5rem 0 0.5rem;
}

/* --- Footer --- */
footer {
    padding: var(--space-xl) 0 var(--space-m);
    border-top: 1px solid var(--glass-border);
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 3rem;
    margin-bottom: 4rem;
}

.footer-bottom {
    padding-top: 2rem;
    border-top: 1px solid var(--glass-border);
    font-size: 0.9rem;
    color: var(--text-muted);
}

/* --- Mobile Nav --- */
.mobile-menu-btn {
    display: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-primary);
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: var(--bg-secondary);
        flex-direction: column;
        padding: 2rem;
        gap: 1.5rem;
        border-bottom: 1px solid var(--glass-border);
    }
    
    .nav-links.nav-active {
        display: flex;
    }
    
    .mobile-menu-btn {
        display: block;
    }
    .hero::before {
        background: rgba(0,0,0,0.6);
    }
}

/* --- Animations --- */
.revealing {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s ease;
}

.revealing.reveal-active {
    opacity: 1;
    transform: translateY(0);
}

section {
    padding: var(--space-xl) 0;
}

/* --- Shop Layout --- */
.shop-layout {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 3rem;
    align-items: start;
    margin-top: 4rem;
}

.shop-sidebar {
    position: sticky;
    top: 100px;
    background: var(--bg-secondary);
    padding: 2rem;
    border-radius: 20px;
    border: 1px solid var(--glass-border);
}

.filter-group {
    margin-bottom: 2.5rem;
}

.filter-group h4 {
    margin-bottom: 1.2rem;
    font-size: 1.1rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--accent-blue);
}

.filter-list {
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
}

.filter-item {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    color: var(--text-secondary);
    transition: 0.3s;
    font-size: 0.95rem;
}

.filter-item:hover, .filter-item.active {
    color: var(--accent-electric);
}

.filter-item input {
    cursor: pointer;
    width: 18px;
    height: 18px;
    accent-color: var(--accent-blue);
}

.shop-controls {
    margin-bottom: 3rem;
    grid-column: 1 / -1;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 2rem;
}

.search-wrapper {
    position: relative;
    flex-grow: 1;
    max-width: 500px;
}

.search-wrapper i {
    position: absolute;
    left: 1.2rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
}

.search-bar {
    width: 100%;
    padding: 1rem 1rem 1rem 3.5rem;
    background: var(--bg-secondary);
    border: 1px solid var(--glass-border);
    border-radius: 50px;
    color: white;
    font-size: 1rem;
    transition: 0.3s;
}

.search-bar:focus {
    outline: none;
    border-color: var(--accent-blue);
    box-shadow: 0 0 15px var(--accent-glow);
}

.sort-select {
    background: var(--bg-secondary);
    color: white;
    padding: 0.8rem 1.5rem;
    border-radius: 10px;
    border: 1px solid var(--glass-border);
    cursor: pointer;
}

@media (max-width: 992px) {
    .shop-layout {
        grid-template-columns: 1fr;
    }
    .shop-sidebar {
        position: static;
        margin-bottom: 2rem;
    }
}