/**
 * Advanced Labs - Ultra Premium Design System
 * Aesthetic: Precision Molecular Research & Dark Luxury Biotech
 */

:root {
    --bg-main: #060913;
    --bg-card: rgba(14, 20, 36, 0.75);
    --bg-card-hover: rgba(22, 32, 56, 0.85);
    --accent-cyan: #00f0ff;
    --accent-blue: #0070f3;
    --accent-glow: rgba(0, 240, 255, 0.15);
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --border-glass: rgba(255, 255, 255, 0.08);
    --border-glow: rgba(0, 240, 255, 0.3);
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 24px;
    --radius-xl: 32px;
    --transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
    scroll-behavior: smooth;
    font-family: var(--font-sans);
    background-color: var(--bg-main);
    color: var(--text-primary);
    -webkit-font-smoothing: antialiased;
}

body {
    min-height: 100vh;
    background: radial-gradient(circle at 50% 0%, #0d182d 0%, #060913 70%);
    overflow-x: hidden;
    line-height: 1.6;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Glass Panels */
.glass-panel {
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-lg);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
    position: relative;
    overflow: hidden;
}

.glass-panel::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(6, 9, 19, 0.85);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-glass);
    transition: var(--transition);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 90px;
}

.brand-logo {
    display: flex;
    align-items: center;
    gap: 14px;
    text-decoration: none;
    color: #fff;
}

.brand-logo img {
    height: 65px;
    filter: drop-shadow(0 0 12px rgba(0, 240, 255, 0.3));
    transition: var(--transition);
}

.brand-logo:hover img {
    transform: scale(1.03);
    filter: drop-shadow(0 0 20px rgba(0, 240, 255, 0.6));
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
    list-style: none;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

.nav-links a:hover, .nav-links a.active {
    color: #fff;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -6px;
    left: 0;
    width: 0%;
    height: 2px;
    background: var(--accent-cyan);
    transition: var(--transition);
}

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

/* Buttons */
.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: linear-gradient(135deg, #0070f3, #00f0ff);
    color: #060913;
    font-weight: 700;
    font-size: 0.95rem;
    padding: 14px 28px;
    border-radius: var(--radius-md);
    text-decoration: none;
    border: none;
    cursor: pointer;
    box-shadow: 0 10px 25px rgba(0, 240, 255, 0.25);
    transition: var(--transition);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 15px 35px rgba(0, 240, 255, 0.45);
    color: #000;
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: rgba(255, 255, 255, 0.05);
    color: #fff;
    font-weight: 600;
    font-size: 0.95rem;
    padding: 14px 26px;
    border-radius: var(--radius-md);
    text-decoration: none;
    border: 1px solid var(--border-glass);
    transition: var(--transition);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--accent-cyan);
    color: var(--accent-cyan);
}

/* Badges */
.badge-tech {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 14px;
    border-radius: 9999px;
    background: rgba(0, 240, 255, 0.08);
    border: 1px solid rgba(0, 240, 255, 0.25);
    color: var(--accent-cyan);
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 1px;
    text-transform: uppercase;
}

.purity-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 5px 12px;
    border-radius: 6px;
    background: rgba(16, 185, 129, 0.15);
    border: 1px solid rgba(16, 185, 129, 0.3);
    color: #10b981;
    font-size: 0.8rem;
    font-weight: 700;
    font-family: var(--font-mono);
}

/* Hero Section */
.hero {
    position: relative;
    padding: 180px 0 100px;
    overflow: hidden;
}

.hero-glow {
    position: absolute;
    width: 600px;
    height: 600px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(0, 240, 255, 0.12) 0%, transparent 70%);
    filter: blur(80px);
    top: 10%;
    left: 50%;
    transform: translateX(-50%);
    pointer-events: none;
    z-index: 0;
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 900px;
    margin: 0 auto;
}

.hero-title {
    font-size: clamp(2.5rem, 5vw, 4.2rem);
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -1.5px;
    margin: 24px 0;
}

.hero-title .gradient-text {
    background: linear-gradient(135deg, #ffffff 40%, var(--accent-cyan) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-subtitle {
    font-size: 1.15rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 40px;
}

/* Stats Row */
.stats-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-top: 60px;
}

.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-md);
    padding: 24px;
    text-align: center;
    backdrop-filter: blur(10px);
}

.stat-value {
    font-size: 2rem;
    font-weight: 800;
    color: var(--accent-cyan);
    font-family: var(--font-mono);
}

.stat-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-top: 6px;
}

/* Product Catalog Grid */
.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(290px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.product-card {
    background: var(--bg-card);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    text-decoration: none;
    color: inherit;
    position: relative;
}

.product-card:hover {
    transform: translateY(-8px);
    border-color: var(--border-glow);
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.6), 0 0 30px rgba(0, 240, 255, 0.15);
}

.product-thumb-container {
    height: 280px;
    background: radial-gradient(circle at center, #1c263c 0%, #0d1424 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    padding: 20px;
    overflow: hidden;
}

.product-thumb {
    max-height: 240px;
    max-width: 90%;
    object-fit: contain;
    filter: drop-shadow(0 15px 30px rgba(0, 0, 0, 0.5));
    transition: var(--transition);
}

.product-card:hover .product-thumb {
    transform: scale(1.08) translateY(-4px);
}

.product-body {
    padding: 24px;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.product-tag {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--accent-cyan);
    font-weight: 700;
    margin-bottom: 8px;
}

.product-name {
    font-size: 1.25rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 12px;
}

.product-desc {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.5;
    margin-bottom: 20px;
    flex-grow: 1;
}

.product-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 16px;
    border-top: 1px solid var(--border-glass);
}

/* Category Filter Tabs */
.filter-tabs {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    flex-wrap: wrap;
    margin: 40px 0;
}

.filter-btn {
    padding: 10px 20px;
    border-radius: 9999px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-glass);
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.filter-btn:hover, .filter-btn.active {
    background: rgba(0, 240, 255, 0.12);
    border-color: var(--accent-cyan);
    color: #fff;
}

/* Batch Verification Box */
.verify-section {
    padding: 100px 0;
    background: linear-gradient(180deg, transparent, rgba(0, 240, 255, 0.03) 50%, transparent);
}

.verify-card {
    background: var(--bg-card);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-xl);
    padding: 60px 40px;
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
    position: relative;
    box-shadow: 0 30px 70px rgba(0, 0, 0, 0.5);
}

.verify-input-group {
    display: flex;
    gap: 12px;
    max-width: 550px;
    margin: 30px auto 0;
}

.verify-input {
    flex-grow: 1;
    background: rgba(0, 0, 0, 0.4);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-md);
    padding: 16px 20px;
    color: #fff;
    font-size: 1.1rem;
    font-family: var(--font-mono);
    text-transform: uppercase;
    letter-spacing: 2px;
    outline: none;
    transition: var(--transition);
}

.verify-input:focus {
    border-color: var(--accent-cyan);
    box-shadow: 0 0 20px rgba(0, 240, 255, 0.2);
}

/* Product Detail Page */
.product-detail-grid {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 60px;
    align-items: start;
    padding: 140px 0 80px;
}

.product-gallery {
    position: sticky;
    top: 120px;
    background: radial-gradient(circle at center, #1c273e 0%, #0c1221 100%);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-xl);
    padding: 60px;
    text-align: center;
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.6);
}

.product-gallery img {
    max-width: 100%;
    max-height: 480px;
    filter: drop-shadow(0 20px 40px rgba(0, 0, 0, 0.6));
}

.spec-table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0 10px;
    margin: 24px 0;
}

.spec-table td {
    background: rgba(255, 255, 255, 0.02);
    padding: 14px 18px;
    font-size: 0.95rem;
    border-top: 1px solid var(--border-glass);
    border-bottom: 1px solid var(--border-glass);
}

.spec-table tr td:first-child {
    border-left: 1px solid var(--border-glass);
    border-radius: 8px 0 0 8px;
    color: var(--text-secondary);
    font-weight: 600;
    width: 35%;
}

.spec-table tr td:last-child {
    border-right: 1px solid var(--border-glass);
    border-radius: 0 8px 8px 0;
    color: #fff;
    font-family: var(--font-mono);
}

/* Footer */
.footer {
    border-top: 1px solid var(--border-glass);
    padding: 80px 0 40px;
    background: #04060c;
    color: var(--text-muted);
    font-size: 0.9rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 50px;
    margin-bottom: 60px;
}

.footer-col h4 {
    color: #fff;
    font-size: 1rem;
    margin-bottom: 20px;
    font-weight: 700;
}

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

.footer-col ul li {
    margin-bottom: 12px;
}

.footer-col ul li a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition);
}

.footer-col ul li a:hover {
    color: var(--accent-cyan);
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

/* Responsiveness */
@media (max-width: 992px) {
    .product-detail-grid { grid-template-columns: 1fr; }
    .product-gallery { position: static; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .nav-links { display: none; }
    .header-inner { height: 75px; }
}

@media (max-width: 600px) {
    .footer-grid { grid-template-columns: 1fr; }
    .verify-input-group { flex-direction: column; }
    .footer-bottom { flex-direction: column; gap: 15px; text-align: center; }
}