/* ========================================
   ZYTEK - Landing Page Stylesheet
   Cores do Brand Guide:
   - Verde Escuro: #015328
   - Verde Claro: #51ad32
   - Azul Escuro: #213344
   - Amarelo: #f0c74b
   ======================================== */

/* CSS Variables */
:root {
    /* Brand Colors */
    --primary-green: #015328;
    --secondary-green: #51ad32;
    --dark-blue: #213344;
    --accent-yellow: #f0c74b;
    
    /* Neutral Colors */
    --white: #ffffff;
    --black: #000000;
    --gray-light: #f5f5f5;
    --gray-medium: #e0e0e0;
    --gray-dark: #666666;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, var(--primary-green) 0%, var(--secondary-green) 100%);
    --gradient-dark: linear-gradient(135deg, var(--dark-blue) 0%, var(--primary-green) 100%);
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    
    /* Typography */
    --font-primary: 'Inter', sans-serif;
    --font-heading: 'Poppins', sans-serif;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.15);
    --shadow-lg: 0 8px 24px rgba(0,0,0,0.2);
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-primary);
    color: var(--dark-blue);
    line-height: 1.6;
    overflow-x: hidden;
}

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

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition-normal);
}

ul {
    list-style: none;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
    color: var(--dark-blue);
}

h1 { font-size: 3.5rem; }
h2 { font-size: 2.5rem; }
h3 { font-size: 2rem; }
h4 { font-size: 1.5rem; }
h5 { font-size: 1.25rem; }
h6 { font-size: 1rem; }

/* Section Styling */
section {
    padding: var(--spacing-xl) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.section-header.centered {
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.section-tag {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-md);
    background: var(--gradient-primary);
    color: var(--white);
    border-radius: 50px;
    font-size: 0.9rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: var(--spacing-sm);
}

.section-tag.light {
    background: var(--accent-yellow);
    color: var(--dark-blue);
}

.section-title {
    margin-bottom: var(--spacing-sm);
    color: var(--dark-blue);
}

.section-description {
    font-size: 1.1rem;
    color: var(--gray-dark);
    max-width: 700px;
    margin: 0 auto;
}

.section-header.light .section-title,
.section-header.light .section-description {
    color: var(--white);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 1rem 2rem;
    font-weight: 600;
    border-radius: 50px;
    cursor: pointer;
    border: 2px solid transparent;
    transition: var(--transition-normal);
    font-size: 1rem;
}

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

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

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

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

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

.animate-fade-in {
    animation: fadeIn 0.8s ease forwards;
}

.animate-fade-in-delay-1 {
    animation: fadeIn 0.8s ease 0.2s forwards;
    opacity: 0;
}

.animate-fade-in-delay-2 {
    animation: fadeIn 0.8s ease 0.4s forwards;
    opacity: 0;
}

.animate-fade-in-delay-3 {
    animation: fadeIn 0.8s ease 0.6s forwards;
    opacity: 0;
}

/* ========================================
   NAVIGATION
   ======================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(1, 83, 40, 0.95);
    backdrop-filter: blur(10px);
    padding: 1rem 0;
    z-index: 1000;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-normal);
}

.navbar.scrolled {
    background: rgba(1, 83, 40, 1);
    padding: 0.5rem 0;
}

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

.logo-img {
    height: 50px;
    width: auto;
}

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

.nav-link {
    color: var(--white);
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: 25px;
    transition: var(--transition-fast);
}

.nav-link:hover,
.nav-link.active {
    background: rgba(255, 255, 255, 0.1);
}

.btn-contact {
    background: var(--accent-yellow);
    color: var(--dark-blue);
    font-weight: 600;
}

.btn-contact:hover {
    background: var(--white);
    transform: scale(1.05);
}

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

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--white);
    border-radius: 3px;
    transition: var(--transition-fast);
}

/* ========================================
   HERO SECTION
   ======================================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding-top: 80px;
    overflow: hidden;
}

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

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(1, 83, 40, 0.9) 0%, rgba(33, 51, 68, 0.8) 100%);
    z-index: 1;
}

.hero-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    color: var(--white);
    max-width: 900px;
    margin: 0 auto;
}

.hero-title {
    font-size: 3.5rem;
    margin-bottom: var(--spacing-md);
    line-height: 1.2;
}

.hero-title .highlight {
    color: var(--accent-yellow);
    position: relative;
}

.hero-subtitle {
    font-size: 1.3rem;
    margin-bottom: var(--spacing-lg);
    opacity: 0.9;
}

.hero-cta {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: var(--spacing-lg);
}

.hero-stats {
    display: flex;
    gap: var(--spacing-lg);
    justify-content: center;
    flex-wrap: wrap;
}

.stat-item {
    text-align: center;
}

.stat-number {
    font-size: 3rem;
    font-weight: 800;
    color: var(--accent-yellow);
    font-family: var(--font-heading);
}

.stat-label {
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    opacity: 0.8;
}

.scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    color: var(--white);
    opacity: 0.7;
    z-index: 2;
}

.mouse {
    width: 24px;
    height: 40px;
    border: 2px solid var(--white);
    border-radius: 15px;
    position: relative;
}

.wheel {
    width: 4px;
    height: 8px;
    background: var(--white);
    border-radius: 2px;
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    animation: scroll 1.5s infinite;
}

@keyframes scroll {
    0%, 100% { opacity: 0; top: 8px; }
    50% { opacity: 1; top: 16px; }
}

/* ========================================
   SOBRE SECTION
   ======================================== */
.sobre {
    background: var(--gray-light);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    align-items: center;
}

.mission-box {
    background: var(--white);
    padding: var(--spacing-lg);
    border-radius: 20px;
    box-shadow: var(--shadow-md);
    margin-bottom: var(--spacing-md);
    text-align: center;
}

.icon-large {
    font-size: 3rem;
    color: var(--secondary-green);
    margin-bottom: var(--spacing-sm);
}

.mission-box h3 {
    margin-bottom: var(--spacing-sm);
    color: var(--primary-green);
}

.pillars h3 {
    margin-bottom: var(--spacing-md);
    color: var(--primary-green);
}

.pillar-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
}

.pillar-card {
    background: var(--white);
    padding: var(--spacing-md);
    border-radius: 15px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-normal);
    text-align: center;
}

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

.pillar-icon {
    width: 60px;
    height: 60px;
    margin: 0 auto var(--spacing-sm);
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--white);
}

.pillar-card h4 {
    margin-bottom: var(--spacing-xs);
    color: var(--primary-green);
}

.pillar-card p {
    font-size: 0.9rem;
    color: var(--gray-dark);
}

.about-image {
    position: relative;
}

.rounded-image {
    border-radius: 20px;
    box-shadow: var(--shadow-lg);
    width: 100%;
}

.image-badge {
    position: absolute;
    bottom: 20px;
    right: 20px;
    background: var(--gradient-primary);
    color: var(--white);
    padding: 1rem 2rem;
    border-radius: 15px;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    box-shadow: var(--shadow-lg);
}

/* ========================================
   VIDEO SECTION
   ======================================== */
.video-section {
    background: var(--gradient-dark);
    color: var(--white);
}

.video-content {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: var(--spacing-lg);
    align-items: center;
}

.video-player-wrapper {
    position: relative;
}

.video-player {
    position: relative;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    background: var(--black);
}

.nano-video {
    width: 100%;
    display: block;
    aspect-ratio: 1/1;
    object-fit: cover;
}

.video-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition-normal);
}

.video-overlay.hidden {
    opacity: 0;
    pointer-events: none;
}

.play-button {
    width: 80px;
    height: 80px;
    background: var(--accent-yellow);
    border: none;
    border-radius: 50%;
    color: var(--dark-blue);
    font-size: 2rem;
    cursor: pointer;
    transition: var(--transition-normal);
    box-shadow: var(--shadow-lg);
}

.play-button:hover {
    transform: scale(1.1);
    background: var(--white);
}

.video-controls {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(transparent, rgba(0,0,0,0.8));
    padding: 1rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    opacity: 0;
    transition: var(--transition-normal);
}

.video-player:hover .video-controls,
.video-controls.show {
    opacity: 1;
}

.control-btn {
    background: none;
    border: none;
    color: var(--white);
    font-size: 1.2rem;
    cursor: pointer;
    transition: var(--transition-fast);
}

.control-btn:hover {
    color: var(--accent-yellow);
}

.progress-bar {
    flex: 1;
    height: 5px;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 5px;
    cursor: pointer;
    position: relative;
}

.progress-filled {
    height: 100%;
    background: var(--accent-yellow);
    border-radius: 5px;
    width: 0%;
    transition: width 0.1s linear;
}

.time-display {
    font-size: 0.9rem;
    color: var(--white);
    min-width: 100px;
}

.video-highlights h3 {
    margin-bottom: var(--spacing-md);
}

.highlight-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.highlight-item {
    display: flex;
    gap: var(--spacing-md);
    align-items: flex-start;
}

.highlight-icon {
    width: 50px;
    height: 50px;
    background: var(--accent-yellow);
    color: var(--dark-blue);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    flex-shrink: 0;
}

.highlight-text h4 {
    color: var(--accent-yellow);
    margin-bottom: var(--spacing-xs);
}

.highlight-text p {
    color: rgba(255, 255, 255, 0.8);
}

/* ========================================
   PRODUTOS SECTION
   ======================================== */
.produtos {
    background: var(--white);
}

.product-highlight {
    display: grid;
    grid-template-columns: 0.8fr 1.8fr;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
    background: var(--gray-light);
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.product-image-main {
    position: relative;
    padding: var(--spacing-md);
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--white);
}

.product-image-main .product-img {
    max-width: 90%;
    max-height: 350px;
    object-fit: contain;
}

.product-badge {
    position: absolute;
    top: 20px;
    right: 20px;
    background: var(--secondary-green);
    color: var(--white);
    padding: 0.5rem 1rem;
    border-radius: 25px;
    font-weight: 600;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.product-img {
    max-width: 100%;
    height: auto;
    border-radius: 15px;
}

.product-info-main {
    padding: var(--spacing-lg);
}

.product-name {
    font-size: 2.5rem;
    color: var(--primary-green);
    margin-bottom: var(--spacing-xs);
}

.product-category {
    color: var(--secondary-green);
    font-weight: 600;
    font-size: 1.1rem;
    margin-bottom: var(--spacing-md);
}

.product-description {
    font-size: 1.1rem;
    line-height: 1.8;
    margin-bottom: var(--spacing-md);
    color: var(--gray-dark);
}

.product-benefits {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
}

.benefit-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-weight: 500;
    color: var(--dark-blue);
}

.benefit-item i {
    color: var(--secondary-green);
    font-size: 1.2rem;
}

.product-actions {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.products-subtitle {
    text-align: center;
    font-size: 2rem;
    margin-bottom: var(--spacing-lg);
    color: var(--primary-green);
}

.products-grid {
    margin-bottom: var(--spacing-xl);
}

.culture-products {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-md);
}

.culture-card {
    background: var(--white);
    padding: var(--spacing-md);
    border-radius: 15px;
    box-shadow: var(--shadow-sm);
    text-align: center;
    transition: var(--transition-normal);
    border: 2px solid transparent;
}

.culture-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
    border-color: var(--secondary-green);
}

.culture-image {
    width: 100%;
    height: 180px;
    margin-bottom: var(--spacing-sm);
    border-radius: 10px;
    overflow: hidden;
}

.culture-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-normal);
}

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

.culture-card h4 {
    margin-bottom: var(--spacing-xs);
    color: var(--primary-green);
}

.dev-badge {
    display: inline-block;
    padding: 0.3rem 0.8rem;
    background: var(--accent-yellow);
    color: var(--dark-blue);
    border-radius: 15px;
    font-size: 0.8rem;
    font-weight: 600;
    margin: var(--spacing-xs) 0;
}

.culture-card p {
    font-size: 0.9rem;
    color: var(--gray-dark);
}

.other-products {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.product-card-horizontal {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: var(--spacing-lg);
    background: var(--gray-light);
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-normal);
}

.product-card-horizontal:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.product-card-horizontal.reverse {
    grid-template-columns: 2fr 1fr;
}

.product-card-horizontal.reverse .product-card-image {
    order: 2;
}

.product-card-image {
    position: relative;
    overflow: hidden;
    min-height: 400px;
    background: var(--white);
}

.product-card-image img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: block;
}

.product-card-badge {
    position: absolute;
    top: 20px;
    left: 20px;
    background: var(--dark-blue);
    color: var(--white);
    padding: 0.5rem 1rem;
    border-radius: 25px;
    font-weight: 600;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.product-card-content {
    padding: var(--spacing-lg);
}

.product-card-content h4 {
    font-size: 1.8rem;
    color: var(--primary-green);
    margin-bottom: var(--spacing-xs);
}

.product-card-category {
    color: var(--secondary-green);
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

.product-card-description {
    color: var(--gray-dark);
    line-height: 1.8;
    margin-bottom: var(--spacing-md);
}

.product-tags {
    display: flex;
    gap: var(--spacing-xs);
    flex-wrap: wrap;
}

.tag {
    padding: 0.4rem 1rem;
    background: var(--white);
    border: 2px solid var(--secondary-green);
    color: var(--secondary-green);
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
}

/* ========================================
   RESULTADOS SECTION
   ======================================== */
.resultados {
    background: var(--gray-light);
}

.results-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.result-card {
    background: var(--white);
    border-radius: 15px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-normal);
}

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

.result-image {
    position: relative;
    overflow: hidden;
    aspect-ratio: 4/3;
}

.result-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-slow);
}

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

.result-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(1, 83, 40, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition-normal);
}

.result-card:hover .result-overlay {
    opacity: 1;
}

.result-overlay i {
    font-size: 2rem;
    color: var(--white);
}

.result-content {
    padding: var(--spacing-md);
}

.result-content h4 {
    margin-bottom: var(--spacing-xs);
    color: var(--primary-green);
}

.result-content p {
    font-size: 0.9rem;
    color: var(--gray-dark);
}

.testimonials {
    text-align: center;
    margin-top: var(--spacing-xl);
}

.testimonials h3 {
    font-size: 2rem;
    margin-bottom: var(--spacing-lg);
    color: var(--primary-green);
}

.testimonial-card {
    max-width: 800px;
    margin: 0 auto;
    background: var(--white);
    padding: var(--spacing-lg);
    border-radius: 20px;
    box-shadow: var(--shadow-md);
}

.quote-icon {
    font-size: 2rem;
    color: var(--secondary-green);
    margin-bottom: var(--spacing-md);
}

.testimonial-content p {
    font-size: 1.2rem;
    line-height: 1.8;
    color: var(--gray-dark);
    font-style: italic;
    margin-bottom: var(--spacing-md);
}

.testimonial-author {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
}

.author-info h5 {
    color: var(--primary-green);
    margin-bottom: 0.2rem;
}

.author-info span {
    color: var(--gray-dark);
    font-size: 0.9rem;
}

/* ========================================
   LABORATÓRIO SECTION
   ======================================== */
.laboratorio {
    background: var(--white);
}

.lab-content {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: var(--spacing-lg);
    align-items: center;
}

.lab-images {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
}

.lab-image-main {
    grid-column: 1 / -1;
}

.lab-image-main img,
.lab-image-secondary img {
    width: 100%;
    border-radius: 15px;
    box-shadow: var(--shadow-md);
}

.lab-info h3 {
    font-size: 2rem;
    color: var(--primary-green);
    margin-bottom: var(--spacing-md);
}

.lab-info > p {
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--gray-dark);
    margin-bottom: var(--spacing-lg);
}

.lab-features {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.lab-feature {
    display: flex;
    gap: var(--spacing-md);
    align-items: flex-start;
    padding: var(--spacing-md);
    background: var(--gray-light);
    border-radius: 15px;
    transition: var(--transition-normal);
}

.lab-feature:hover {
    background: var(--white);
    box-shadow: var(--shadow-sm);
}

.lab-feature i {
    font-size: 2rem;
    color: var(--secondary-green);
    flex-shrink: 0;
}

.lab-feature h4 {
    color: var(--primary-green);
    margin-bottom: 0.3rem;
}

.lab-feature p {
    font-size: 0.9rem;
    color: var(--gray-dark);
}

/* ========================================
   CONTATO SECTION
   ======================================== */
.contato {
    background: var(--gray-light);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: var(--spacing-lg);
}

.contact-info h3 {
    font-size: 2rem;
    color: var(--primary-green);
    margin-bottom: var(--spacing-lg);
}

.contact-items {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.contact-item {
    display: flex;
    gap: var(--spacing-md);
    align-items: flex-start;
}

.contact-item i {
    width: 50px;
    height: 50px;
    background: var(--gradient-primary);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    flex-shrink: 0;
}

.contact-item h4 {
    color: var(--primary-green);
    margin-bottom: 0.3rem;
}

.contact-item a {
    color: var(--secondary-green);
    font-weight: 500;
}

.contact-item a:hover {
    text-decoration: underline;
}

.social-links h4 {
    color: var(--primary-green);
    margin-bottom: var(--spacing-md);
}

.social-icons {
    display: flex;
    gap: var(--spacing-sm);
}

.social-icon {
    width: 45px;
    height: 45px;
    background: var(--gradient-primary);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    transition: var(--transition-normal);
}

.social-icon:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.contact-form-wrapper {
    background: var(--white);
    padding: var(--spacing-lg);
    border-radius: 20px;
    box-shadow: var(--shadow-md);
}

.contact-form {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group.full-width {
    grid-column: 1 / -1;
}

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

.form-group input,
.form-group select,
.form-group textarea {
    padding: 0.8rem;
    border: 2px solid var(--gray-medium);
    border-radius: 10px;
    font-family: var(--font-primary);
    font-size: 1rem;
    transition: var(--transition-fast);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--secondary-green);
}

.btn-submit {
    grid-column: 1 / -1;
    justify-self: start;
}

/* ========================================
   FOOTER
   ======================================== */
.footer {
    background: var(--dark-blue);
    color: var(--white);
    padding: var(--spacing-xl) 0 var(--spacing-md);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.footer-logo {
    height: 60px;
    margin-bottom: var(--spacing-md);
}

.footer-col h4 {
    color: var(--accent-yellow);
    margin-bottom: var(--spacing-md);
}

.footer-col p {
    opacity: 0.8;
    line-height: 1.8;
}

.footer-col ul {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.footer-col a {
    opacity: 0.8;
    transition: var(--transition-fast);
}

.footer-col a:hover {
    opacity: 1;
    color: var(--accent-yellow);
}

.newsletter-form {
    display: flex;
    gap: var(--spacing-xs);
    margin-top: var(--spacing-md);
}

.newsletter-form input {
    flex: 1;
    padding: 0.8rem;
    border: none;
    border-radius: 25px;
    font-family: var(--font-primary);
}

.newsletter-form button {
    width: 45px;
    height: 45px;
    background: var(--accent-yellow);
    color: var(--dark-blue);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition-fast);
}

.newsletter-form button:hover {
    transform: scale(1.1);
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-links {
    display: flex;
    gap: var(--spacing-md);
}

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

/* ========================================
   BACK TO TOP
   ======================================== */
.back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 50px;
    height: 50px;
    background: var(--gradient-primary);
    color: var(--white);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-normal);
    z-index: 999;
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    transform: translateY(-3px);
}

/* ========================================
   RESPONSIVE DESIGN
   ======================================== */

@media (max-width: 1024px) {
    h1 { font-size: 2.5rem; }
    h2 { font-size: 2rem; }
    
    .hero-title { font-size: 2.5rem; }
    
    .about-content,
    .video-content,
    .lab-content,
    .contact-content {
        grid-template-columns: 1fr;
    }
    
    .product-highlight {
        grid-template-columns: 1fr;
    }
    
    .culture-products {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .results-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-content {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 70px);
        background: var(--primary-green);
        flex-direction: column;
        padding: var(--spacing-lg);
        transition: var(--transition-normal);
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .hamburger.active span:nth-child(1) {
        transform: rotate(45deg) translate(8px, 8px);
    }
    
    .hamburger.active span:nth-child(2) {
        opacity: 0;
    }
    
    .hamburger.active span:nth-child(3) {
        transform: rotate(-45deg) translate(8px, -8px);
    }
    
    .hero-cta {
        flex-direction: column;
        align-items: center;
    }
    
    .hero-cta .btn {
        width: 100%;
        max-width: 300px;
        justify-content: center;
    }
    
    .pillar-grid {
        grid-template-columns: 1fr;
    }
    
    .culture-products {
        grid-template-columns: 1fr;
    }
    
    .product-card-horizontal,
    .product-card-horizontal.reverse {
        grid-template-columns: 1fr;
    }
    
    .product-card-horizontal.reverse .product-card-image {
        order: 1;
    }
    
    .results-grid {
        grid-template-columns: 1fr;
    }
    
    .lab-images {
        grid-template-columns: 1fr;
    }
    
    .contact-form {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: var(--spacing-md);
        text-align: center;
    }
}

@media (max-width: 480px) {
    h1 { font-size: 2rem; }
    h2 { font-size: 1.5rem; }
    
    .hero-title { font-size: 2rem; }
    .hero-subtitle { font-size: 1rem; }
    
    .stat-number { font-size: 2rem; }
    
    .product-benefits {
        grid-template-columns: 1fr;
    }
    
    .product-actions {
        flex-direction: column;
    }
    
    .product-actions .btn {
        width: 100%;
        justify-content: center;
    }
}