/* ============================================
   HERBALIFE NUTRITION - DESIGN SYSTEM
   ============================================ */

/* CSS Variables - Chlorophyll Palette */
:root {
    /* Primary Colors */
    --color-primary: #2D6A1E;
    --color-primary-dark: #1A4A0F;
    --color-primary-light: #4A8F3A;
    --color-accent: #B8F369;
    --color-accent-dark: #9AD94A;
    
    /* Neutral Colors */
    --color-white: #FFFFFF;
    --color-cream: #F9F7F4;
    --color-light: #F0FFF0;
    --color-gray-100: #F5F5F5;
    --color-gray-200: #E8E8E8;
    --color-gray-300: #D1D1D1;
    --color-gray-500: #6B7280;
    --color-gray-700: #374151;
    --color-gray-900: #1A1A1A;
    
    /* Typography */
    --font-display: 'Playfair Display', Georgia, serif;
    --font-body: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
    
    /* Font Sizes */
    --text-xs: 0.75rem;
    --text-sm: 0.875rem;
    --text-base: 1rem;
    --text-lg: 1.125rem;
    --text-xl: 1.25rem;
    --text-2xl: 1.5rem;
    --text-3xl: 1.875rem;
    --text-4xl: 2.25rem;
    --text-5xl: 3rem;
    --text-6xl: 3.75rem;
    --text-7xl: 4.5rem;
    
    /* Spacing */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-20: 5rem;
    --space-24: 6rem;
    
    /* Border Radius */
    --radius-sm: 0.25rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-glow: 0 0 40px rgba(184, 243, 105, 0.3);
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 350ms ease;
    
    /* Container */
    --container-max: 1280px;
    --container-padding: 1.5rem;
}

/* Reset & Base */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-body);
    font-size: var(--text-base);
    line-height: 1.6;
    color: var(--color-gray-900);
    background-color: var(--color-white);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    color: inherit;
    text-decoration: none;
}

ul {
    list-style: none;
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

/* ============================================
   NAVIGATION
   ============================================ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    transition: all var(--transition-base);
}

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

.nav-container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: var(--space-4) var(--container-padding);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-family: var(--font-display);
    font-size: var(--text-2xl);
    font-weight: 600;
    color: var(--color-primary);
}

.logo-icon {
    font-size: 1.75rem;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--space-8);
}

.nav-links a {
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--color-gray-700);
    transition: color var(--transition-fast);
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-primary);
    transition: width var(--transition-fast);
}

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

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

.nav-actions {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: var(--space-2);
}

.mobile-menu-btn span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-gray-900);
    transition: all var(--transition-fast);
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-6);
    font-size: var(--text-sm);
    font-weight: 600;
    border-radius: var(--radius-full);
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.btn-primary {
    background: var(--color-primary);
    color: var(--color-white);
    box-shadow: var(--shadow-md);
}

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

.btn-secondary {
    background: transparent;
    color: var(--color-primary);
    border: 2px solid var(--color-primary);
}

.btn-secondary:hover {
    background: var(--color-primary);
    color: var(--color-white);
}

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

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

.btn-text {
    background: transparent;
    color: var(--color-primary);
    padding: var(--space-2) 0;
}

.btn-text:hover {
    text-decoration: underline;
}

.btn-large {
    padding: var(--space-4) var(--space-8);
    font-size: var(--text-base);
}

/* ============================================
   HERO SECTION
   ============================================ */
.hero {
    min-height: 100vh;
    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: center;
    padding: calc(80px + var(--space-16)) var(--container-padding) var(--space-16);
    position: relative;
    overflow: hidden;
    background: linear-gradient(135deg, var(--color-light) 0%, var(--color-cream) 50%, var(--color-white) 100%);
}

.hero-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
}

.hero-gradient {
    position: absolute;
    top: -50%;
    right: -30%;
    width: 80%;
    height: 150%;
    background: radial-gradient(ellipse, rgba(184, 243, 105, 0.3) 0%, transparent 70%);
    animation: float 20s ease-in-out infinite;
}

.hero-pattern {
    position: absolute;
    inset: 0;
    background-image: 
        radial-gradient(circle at 20% 80%, rgba(45, 106, 30, 0.03) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(184, 243, 105, 0.1) 0%, transparent 50%);
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 600px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-4);
    background: rgba(184, 243, 105, 0.3);
    border: 1px solid var(--color-accent);
    border-radius: var(--radius-full);
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--color-primary-dark);
    margin-bottom: var(--space-6);
    animation: fadeInUp 0.6s ease;
}

.hero-title {
    font-family: var(--font-display);
    font-size: var(--text-6xl);
    font-weight: 600;
    line-height: 1.1;
    margin-bottom: var(--space-6);
    color: var(--color-gray-900);
}

.title-line {
    display: block;
}

.title-line.highlight {
    color: var(--color-primary);
    position: relative;
}

.title-line.highlight::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 8px;
    background: var(--color-accent);
    opacity: 0.4;
    z-index: -1;
}

.hero-subtitle {
    font-size: var(--text-lg);
    color: var(--color-gray-500);
    margin-bottom: var(--space-8);
    max-width: 480px;
    line-height: 1.7;
}

.hero-cta {
    display: flex;
    gap: var(--space-4);
    margin-bottom: var(--space-12);
}

.hero-stats {
    display: flex;
    gap: var(--space-10);
    padding-top: var(--space-8);
    border-top: 1px solid var(--color-gray-200);
}

.stat {
    display: flex;
    flex-direction: column;
}

.stat-number {
    font-family: var(--font-display);
    font-size: var(--text-3xl);
    font-weight: 700;
    color: var(--color-primary);
}

.stat-label {
    font-size: var(--text-sm);
    color: var(--color-gray-500);
}

/* Hero Visual */
.hero-visual {
    position: relative;
    z-index: 1;
    display: flex;
    justify-content: center;
    align-items: center;
}

.product-showcase {
    position: relative;
    width: 100%;
    max-width: 500px;
    height: 500px;
}

.product-card {
    position: relative;
    background: var(--color-white);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-xl);
    padding: var(--space-8);
    animation: float 6s ease-in-out infinite;
}

.product-card.main-product {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 280px;
    height: 320px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.product-glow {
    position: absolute;
    inset: -20px;
    background: radial-gradient(circle, rgba(184, 243, 105, 0.4) 0%, transparent 70%);
    border-radius: var(--radius-2xl);
    z-index: -1;
    animation: pulse 3s ease-in-out infinite;
}

.product-placeholder {
    text-align: center;
}

.product-placeholder span {
    font-size: 6rem;
    display: block;
    margin-bottom: var(--space-4);
}

.product-placeholder p {
    font-family: var(--font-display);
    font-size: var(--text-xl);
    font-weight: 600;
    color: var(--color-primary);
    line-height: 1.3;
}

.floating-element {
    position: absolute;
    background: var(--color-white);
    padding: var(--space-4) var(--space-5);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: var(--space-3);
    font-size: var(--text-sm);
    font-weight: 500;
    animation: float 4s ease-in-out infinite;
}

.floating-element span {
    font-size: 1.5rem;
}

.floating-element.element-1 {
    top: 10%;
    left: 0;
    animation-delay: 0s;
}

.floating-element.element-2 {
    top: 20%;
    right: 0;
    animation-delay: 1s;
}

.floating-element.element-3 {
    bottom: 20%;
    left: 10%;
    animation-delay: 2s;
}

/* ============================================
   SECTIONS COMMON
   ============================================ */
.section-header {
    text-align: center;
    max-width: 600px;
    margin: 0 auto var(--space-16);
}

.section-tag {
    display: inline-block;
    padding: var(--space-2) var(--space-4);
    background: var(--color-light);
    color: var(--color-primary);
    font-size: var(--text-sm);
    font-weight: 600;
    border-radius: var(--radius-full);
    margin-bottom: var(--space-4);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.section-title {
    font-family: var(--font-display);
    font-size: var(--text-4xl);
    font-weight: 600;
    color: var(--color-gray-900);
    margin-bottom: var(--space-4);
    line-height: 1.2;
}

.section-subtitle {
    font-size: var(--text-lg);
    color: var(--color-gray-500);
    line-height: 1.6;
}

/* ============================================
   PRODUCTS SECTION
   ============================================ */
.products {
    padding: var(--space-24) var(--container-padding);
    background: var(--color-white);
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-6);
    max-width: var(--container-max);
    margin: 0 auto;
}

.product-category {
    background: var(--color-cream);
    border-radius: var(--radius-2xl);
    padding: var(--space-8);
    text-align: center;
    transition: all var(--transition-base);
    border: 1px solid transparent;
}

.product-category:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: var(--color-accent);
    background: var(--color-white);
}

.category-icon {
    font-size: 3rem;
    margin-bottom: var(--space-4);
    display: block;
}

.product-category h3 {
    font-family: var(--font-display);
    font-size: var(--text-xl);
    font-weight: 600;
    margin-bottom: var(--space-3);
    color: var(--color-gray-900);
}

.product-category p {
    font-size: var(--text-sm);
    color: var(--color-gray-500);
    margin-bottom: var(--space-4);
    line-height: 1.6;
}

.link-arrow {
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--color-primary);
    transition: all var(--transition-fast);
}

.link-arrow:hover {
    gap: var(--space-3);
}

/* ============================================
   FEATURED PRODUCT
   ============================================ */
.featured {
    padding: var(--space-24) var(--container-padding);
    background: linear-gradient(180deg, var(--color-white) 0%, var(--color-light) 100%);
}

.featured-container {
    max-width: var(--container-max);
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-16);
    align-items: center;
}

.featured-tag {
    display: inline-block;
    padding: var(--space-2) var(--space-4);
    background: var(--color-accent);
    color: var(--color-primary-dark);
    font-size: var(--text-sm);
    font-weight: 600;
    border-radius: var(--radius-full);
    margin-bottom: var(--space-4);
}

.featured-title {
    font-family: var(--font-display);
    font-size: var(--text-4xl);
    font-weight: 600;
    color: var(--color-gray-900);
    margin-bottom: var(--space-4);
    line-height: 1.2;
}

.featured-desc {
    font-size: var(--text-lg);
    color: var(--color-gray-500);
    margin-bottom: var(--space-6);
    line-height: 1.7;
}

.featured-benefits {
    margin-bottom: var(--space-8);
}

.featured-benefits li {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    margin-bottom: var(--space-3);
    font-size: var(--text-base);
    color: var(--color-gray-700);
}

.featured-benefits .check {
    width: 24px;
    height: 24px;
    background: var(--color-accent);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--text-sm);
    color: var(--color-primary-dark);
    flex-shrink: 0;
}

.featured-actions {
    display: flex;
    align-items: center;
    gap: var(--space-6);
}

/* Featured Visual */
.featured-visual {
    display: flex;
    justify-content: center;
}

.featured-product-card {
    position: relative;
    background: var(--color-white);
    border-radius: var(--radius-2xl);
    padding: var(--space-8);
    box-shadow: var(--shadow-xl);
    width: 100%;
    max-width: 400px;
}

.product-badge {
    position: absolute;
    top: -12px;
    right: var(--space-6);
    background: var(--color-primary);
    color: var(--color-white);
    padding: var(--space-2) var(--space-4);
    border-radius: var(--radius-full);
    font-size: var(--text-sm);
    font-weight: 600;
}

.product-visual {
    height: 280px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-light) 0%, var(--color-cream) 100%);
    border-radius: var(--radius-xl);
    margin-bottom: var(--space-6);
}

.shake-illustration {
    position: relative;
}

.shake-cup {
    font-size: 8rem;
    animation: float 3s ease-in-out infinite;
}

.splash-effect {
    position: absolute;
    top: -20px;
    right: -30px;
    width: 60px;
    height: 60px;
    background: var(--color-accent);
    border-radius: 50%;
    opacity: 0.6;
    animation: pulse 2s ease-in-out infinite;
}

.flavor-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
    justify-content: center;
}

.flavor {
    padding: var(--space-2) var(--space-3);
    background: var(--color-cream);
    border-radius: var(--radius-full);
    font-size: var(--text-xs);
    font-weight: 500;
    color: var(--color-gray-700);
}

/* ============================================
   SCIENCE SECTION
   ============================================ */
.science {
    padding: var(--space-24) var(--container-padding);
    background: var(--color-white);
}

.science-container {
    max-width: var(--container-max);
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-16);
    align-items: center;
}

.science-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.science-graphic {
    position: relative;
    width: 400px;
    height: 400px;
}

.molecule {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 200px;
    height: 200px;
}

.atom {
    position: absolute;
    width: 40px;
    height: 40px;
    background: var(--color-primary);
    border-radius: 50%;
    box-shadow: var(--shadow-lg);
}

.atom-1 {
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    animation: float 4s ease-in-out infinite;
}

.atom-2 {
    bottom: 0;
    left: 0;
    animation: float 4s ease-in-out infinite 1s;
}

.atom-3 {
    bottom: 0;
    right: 0;
    animation: float 4s ease-in-out infinite 2s;
}

.bond {
    position: absolute;
    height: 4px;
    background: var(--color-accent);
    border-radius: var(--radius-full);
}

.bond-1 {
    top: 50%;
    left: 20px;
    width: 100px;
    transform: rotate(60deg);
    transform-origin: left center;
}

.bond-2 {
    top: 50%;
    right: 20px;
    width: 100px;
    transform: rotate(-60deg);
    transform-origin: right center;
}

.science-icons {
    position: absolute;
    inset: 0;
}

.sci-icon {
    position: absolute;
    font-size: 2.5rem;
    opacity: 0.6;
    animation: float 5s ease-in-out infinite;
}

.sci-icon:nth-child(1) {
    top: 10%;
    left: 20%;
    animation-delay: 0s;
}

.sci-icon:nth-child(2) {
    top: 30%;
    right: 10%;
    animation-delay: 1s;
}

.sci-icon:nth-child(3) {
    bottom: 20%;
    left: 30%;
    animation-delay: 2s;
}

.science-content .section-title {
    text-align: left;
}

.science-content .section-subtitle {
    text-align: left;
    margin-bottom: var(--space-8);
}

.science-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-6);
}

.science-stat {
    text-align: center;
    padding: var(--space-6);
    background: var(--color-cream);
    border-radius: var(--radius-xl);
    transition: all var(--transition-base);
}

.science-stat:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.stat-icon {
    font-size: 2rem;
    display: block;
    margin-bottom: var(--space-3);
}

.stat-value {
    font-family: var(--font-display);
    font-size: var(--text-3xl);
    font-weight: 700;
    color: var(--color-primary);
    display: block;
}

.stat-desc {
    font-size: var(--text-sm);
    color: var(--color-gray-500);
}

/* ============================================
   COMMUNITY SECTION
   ============================================ */
.community {
    padding: var(--space-24) var(--container-padding);
    background: linear-gradient(180deg, var(--color-light) 0%, var(--color-white) 100%);
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-6);
    max-width: var(--container-max);
    margin: 0 auto var(--space-12);
}

.testimonial-card {
    background: var(--color-white);
    border-radius: var(--radius-2xl);
    padding: var(--space-8);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
}

.testimonial-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.testimonial-card.featured-testimonial {
    background: var(--color-primary);
    color: var(--color-white);
    transform: scale(1.05);
}

.testimonial-card.featured-testimonial:hover {
    transform: scale(1.05) translateY(-8px);
}

.testimonial-card.featured-testimonial .testimonial-text,
.testimonial-card.featured-testimonial .author-name {
    color: var(--color-white);
}

.testimonial-card.featured-testimonial .author-title {
    color: rgba(255, 255, 255, 0.7);
}

.testimonial-stars {
    color: var(--color-accent);
    font-size: var(--text-lg);
    margin-bottom: var(--space-4);
    letter-spacing: 2px;
}

.testimonial-text {
    font-size: var(--text-base);
    line-height: 1.7;
    color: var(--color-gray-700);
    margin-bottom: var(--space-6);
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.author-avatar {
    width: 48px;
    height: 48px;
    background: var(--color-cream);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.author-info {
    display: flex;
    flex-direction: column;
}

.author-name {
    font-weight: 600;
    color: var(--color-gray-900);
}

.author-title {
    font-size: var(--text-sm);
    color: var(--color-gray-500);
}

.community-cta {
    text-align: center;
}

/* ============================================
   OPPORTUNITY SECTION
   ============================================ */
.opportunity {
    padding: var(--space-24) var(--container-padding);
    background: var(--color-white);
}

.opportunity-container {
    max-width: var(--container-max);
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: var(--space-16);
    align-items: center;
}

.opportunity-content .section-title {
    text-align: left;
}

.opportunity-content .section-subtitle {
    text-align: left;
    margin-bottom: var(--space-8);
}

.opportunity-benefits {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-4);
    margin-bottom: var(--space-8);
}

.benefit {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-4);
    background: var(--color-cream);
    border-radius: var(--radius-lg);
}

.benefit-icon {
    font-size: 1.5rem;
}

.benefit-text {
    font-weight: 500;
    color: var(--color-gray-700);
}

.opportunity-visual {
    display: flex;
    justify-content: center;
}

.opportunity-card {
    background: var(--color-white);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-xl);
    overflow: hidden;
    max-width: 380px;
    border: 1px solid var(--color-gray-200);
}

.card-header {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    color: var(--color-white);
    padding: var(--space-6);
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.card-icon {
    font-size: 1.5rem;
}

.card-title {
    font-weight: 600;
}

.card-content {
    padding: var(--space-6);
}

.card-content p {
    font-size: var(--text-base);
    line-height: 1.7;
    color: var(--color-gray-700);
    margin-bottom: var(--space-4);
}

.card-author {
    border-top: 1px solid var(--color-gray-200);
    padding-top: var(--space-4);
}

.card-author .name {
    font-weight: 600;
    color: var(--color-primary);
    display: block;
}

.card-author .role {
    font-size: var(--text-sm);
    color: var(--color-gray-500);
}

/* ============================================
   NEWSLETTER
   ============================================ */
.newsletter {
    padding: var(--space-20) var(--container-padding);
    background: var(--color-primary);
}

.newsletter-container {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.newsletter .section-tag {
    background: rgba(255, 255, 255, 0.2);
    color: var(--color-white);
}

.newsletter .section-title {
    color: var(--color-white);
}

.newsletter .section-subtitle {
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: var(--space-8);
}

.newsletter-form {
    max-width: 500px;
    margin: 0 auto;
}

.form-group {
    display: flex;
    gap: var(--space-3);
    margin-bottom: var(--space-3);
}

.form-group input {
    flex: 1;
    padding: var(--space-4) var(--space-6);
    border: none;
    border-radius: var(--radius-full);
    font-size: var(--text-base);
    font-family: inherit;
    outline: none;
}

.form-group input::placeholder {
    color: var(--color-gray-500);
}

.form-group .btn {
    flex-shrink: 0;
}

.form-note {
    font-size: var(--text-sm);
    color: rgba(255, 255, 255, 0.6);
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
    background: var(--color-gray-900);
    color: var(--color-white);
    padding: var(--space-20) var(--container-padding) var(--space-8);
}

.footer-container {
    max-width: var(--container-max);
    margin: 0 auto;
}

.footer-main {
    display: grid;
    grid-template-columns: 1.5fr 2fr;
    gap: var(--space-16);
    margin-bottom: var(--space-16);
}

.footer-brand .logo {
    color: var(--color-white);
    margin-bottom: var(--space-4);
}

.footer-tagline {
    color: var(--color-gray-300);
    margin-bottom: var(--space-6);
    max-width: 280px;
}

.social-links {
    display: flex;
    gap: var(--space-4);
}

.social-links a {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    transition: all var(--transition-fast);
}

.social-links a:hover {
    background: var(--color-primary);
    transform: translateY(-2px);
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-8);
}

.footer-column h4 {
    font-size: var(--text-base);
    font-weight: 600;
    margin-bottom: var(--space-4);
    color: var(--color-white);
}

.footer-column ul li {
    margin-bottom: var(--space-3);
}

.footer-column ul li a {
    color: var(--color-gray-300);
    font-size: var(--text-sm);
    transition: color var(--transition-fast);
}

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

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: var(--space-8);
    text-align: center;
}

.footer-bottom p {
    font-size: var(--text-sm);
    color: var(--color-gray-300);
    margin-bottom: var(--space-2);
}

.footer-disclaimer {
    font-size: var(--text-xs);
    color: var(--color-gray-500);
    max-width: 800px;
    margin: 0 auto;
}

/* ============================================
   ANIMATIONS
   ============================================ */
@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-20px);
    }
}

@keyframes pulse {
    0%, 100% {
        opacity: 0.4;
        transform: scale(1);
    }
    50% {
        opacity: 0.7;
        transform: scale(1.1);
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */
@media (max-width: 1024px) {
    .hero {
        grid-template-columns: 1fr;
        text-align: center;
        padding-top: calc(80px + var(--space-12));
    }
    
    .hero-content {
        max-width: 100%;
    }
    
    .hero-title {
        font-size: var(--text-5xl);
    }
    
    .hero-subtitle {
        margin-left: auto;
        margin-right: auto;
    }
    
    .hero-cta {
        justify-content: center;
    }
    
    .hero-stats {
        justify-content: center;
    }
    
    .hero-visual {
        display: none;
    }
    
    .products-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .featured-container,
    .science-container,
    .opportunity-container {
        grid-template-columns: 1fr;
        gap: var(--space-12);
    }
    
    .featured-content,
    .science-content,
    .opportunity-content {
        text-align: center;
    }
    
    .featured-content .section-title,
    .science-content .section-title,
    .opportunity-content .section-title {
        text-align: center;
    }
    
    .featured-content .section-subtitle,
    .science-content .section-subtitle,
    .opportunity-content .section-subtitle {
        text-align: center;
    }
    
    .featured-actions {
        justify-content: center;
    }
    
    .science-stats {
        max-width: 600px;
        margin: 0 auto;
    }
    
    .opportunity-benefits {
        max-width: 500px;
        margin: 0 auto var(--space-8);
    }
    
    .testimonials-grid {
        grid-template-columns: 1fr;
        max-width: 500px;
    }
    
    .testimonial-card.featured-testimonial {
        transform: none;
    }
    
    .footer-main {
        grid-template-columns: 1fr;
        gap: var(--space-12);
    }
    
    .footer-links {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .nav-links,
    .nav-actions {
        display: none;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .hero-title {
        font-size: var(--text-4xl);
    }
    
    .hero-stats {
        flex-direction: column;
        gap: var(--space-6);
    }
    
    .products-grid {
        grid-template-columns: 1fr;
    }
    
    .science-stats {
        grid-template-columns: 1fr;
    }
    
    .opportunity-benefits {
        grid-template-columns: 1fr;
    }
    
    .footer-links {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .form-group {
        flex-direction: column;
    }
    
    .form-group .btn {
        width: 100%;
    }
}

/* Mobile Menu Active State */
.nav-links.active {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-white);
    padding: var(--space-6);
    box-shadow: var(--shadow-lg);
    gap: var(--space-4);
}

/* Scroll Reveal Animation */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

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