:root {
    --primary-color: #1e8a4c;
    --secondary-color: #35b869;
    --accent-color: #66c18c;
    --light-color: #e6f3eb;
    --dark-color: #1a422d;
    --text-color: #333333;
    --text-light: #666666;
    --white: #ffffff;
    --gray-light: #f5f5f5;
    --gray: #e0e0e0;
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
    --border-radius: 4px;
    --container-max-width: 1200px;
    --header-height: 80px;
}

.video-container {
    position: relative;
    padding-bottom: 56.25%;
    height: 0;
    overflow: hidden;
    max-width: 100%;
    margin: 0 auto 3rem auto;
    display: block;
}

.video-container iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}


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

body {
    font-family: 'Roboto', sans-serif;
    color: var(--text-color);
    line-height: 1.6;
    background-color: var(--white);
}

h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1rem;
    color: var(--dark-color);
}

h1 {
    font-size: 2.5rem;
}

h2 {
    font-size: 2rem;
}

h3 {
    font-size: 1.5rem;
}

p {
    margin-bottom: 1.5rem;
}

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

a:hover {
    color: var(--secondary-color);
}

ul, ol {
    margin-bottom: 1.5rem;
    padding-left: 1.5rem;
}

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

.container {
    width: 100%;
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 1.5rem;
}

.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius);
    text-align: center;
    font-weight: 600;
    transition: var(--transition);
    cursor: pointer;
    border: none;
}

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

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

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

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

/* Header Styles */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--header-height);
    background-color: var(--white);
    box-shadow: var(--shadow);
    z-index: 1000;
}

.site-header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 100%;
}

.logo {
    height: 50px;
}

.logo img {
    height: 100%;
}

.logo-right {
    height: 50px;
    margin-left: auto;
}

.logo-right img {
    height: 100%;
}

.main-nav ul {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
}

.main-nav li {
    margin-left: 2rem;
}

.main-nav a {
    color: var(--text-color);
    font-weight: 500;
    position: relative;
}

.main-nav a:hover,
.main-nav a.active {
    color: var(--primary-color);
}

.main-nav a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--primary-color);
    transition: var(--transition);
}

.main-nav a:hover::after,
.main-nav a.active::after {
    width: 100%;
}

.hamburger-menu {
    display: none;
    cursor: pointer;
}

.hamburger-menu span {
    display: block;
    width: 25px;
    height: 3px;
    background-color: var(--text-color);
    margin: 5px 0;
    transition: var(--transition);
}

/* Main Content Styles */
main {
    margin-top: var(--header-height);
    padding-bottom: 4rem;
}

/* Hero Section */
.hero {
    padding: 5rem 0;
    background-color: var(--light-color);
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
}

.hero-content h1 {
    font-size: 3rem;
    margin-bottom: 1.5rem;
    color: var(--dark-color);
}

.hero-content p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
}

.hero-image {
    text-align: center;
}

/* What is GRETA Section */
.what-is-greta {
    padding: 5rem 0;
}

.section-header {
    text-align: center;
    margin-bottom: 3rem;
}

.section-header h2 {
    position: relative;
    display: inline-block;
    padding-bottom: 0.5rem;
}

.section-header h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 25%;
    width: 50%;
    height: 3px;
    background-color: var(--primary-color);
}

.greta-description {
    max-width: 800px;
    margin: 0 auto 3rem;
    text-align: center;
    font-size: 1.2rem;
}

.highlight {
    color: var(--primary-color);
    font-weight: 500;
}

.greta-visuals {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
}

.visual-card {
    background-color: var(--gray-light);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    box-shadow: var(--shadow);
}

.visual-card h3 {
    margin-bottom: 1rem;
    text-align: center;
}

/* Features Overview Section */
.features-overview {
    padding: 5rem 0;
    background-color: var(--light-color);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.feature-card {
    background-color: var(--white);
    border-radius: var(--border-radius);
    padding: 2rem;
    text-align: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-10px);
}

.feature-icon {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
}

.feature-card h3 {
    margin-bottom: 1rem;
}

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

/* Success Stories Preview */
.success-stories-preview {
    padding: 5rem 0;
}

.stories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.story-card {
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.story-card:hover {
    transform: translateY(-10px);
}

.story-image {
    height: 200px;
    overflow: hidden;
}

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

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

.story-content {
    padding: 1.5rem;
    background-color: var(--white);
}

.story-content h3 {
    margin-bottom: 0.5rem;
}

.read-more {
    display: inline-block;
    margin-top: 1rem;
    font-weight: 600;
    color: var(--primary-color);
}

.read-more:hover {
    color: var(--secondary-color);
}

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

/* Circular Economy Section */
.circular-economy {
    padding: 5rem 0;
    background-color: var(--light-color);
}

.circular-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
}

.circular-principles {
    list-style: none;
    padding: 0;
    margin-top: 2rem;
}

.circular-principles li {
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
}

.circular-principles i {
    color: var(--primary-color);
    margin-right: 0.5rem;
}

/* CTA Section */
.cta-section {
    padding: 5rem 0;
    background-color: var(--primary-color);
    color: var(--white);
    text-align: center;
}

.cta-content h2 {
    color: var(--white);
    margin-bottom: 1rem;
}

.cta-content p {
    max-width: 600px;
    margin: 0 auto 2rem;
    font-size: 1.2rem;
}

.cta-section .btn-primary {
    background-color: var(--white);
    color: var(--primary-color);
}

.cta-section .btn-primary:hover {
    background-color: var(--light-color);
}

.cta-buttons {
    display: flex;
    justify-content: center;
    gap: 1rem;
}

/* Page Header */
.page-header {
    background-color: var(--primary-color);
    color: var(--white);
    padding: 5rem 0 2rem;
    text-align: center;
}

.page-header h1 {
    color: var(--white);
    margin-bottom: 0.5rem;
}

/* Features Page */
.features-intro {
    padding: 3rem 0;
    text-align: center;
}

.intro-text {
    max-width: 800px;
    margin: 0 auto;
    font-size: 1.2rem;
}

.features-detailed {
    padding: 3rem 0;
}

.feature-item {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 2rem;
    margin-bottom: 3rem;
    padding-bottom: 3rem;
    border-bottom: 1px solid var(--gray);
}

.feature-item:last-child {
    border-bottom: none;
}

.feature-item .feature-icon {
    font-size: 3rem;
    color: var(--primary-color);
}

.feature-image {
    margin-top: 1.5rem;
}

/* Success Stories Page */
.success-stories-intro {
    padding: 3rem 0;
    text-align: center;
}

.success-stories-detailed {
    padding: 3rem 0;
}

.story-item {
    margin-bottom: 4rem;
}

.story-header {
    margin-bottom: 2rem;
}

.story-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 2rem;
}

.highlighted-text {
    font-style: italic;
    color: var(--primary-color);
    margin: 1rem 0;
    font-weight: 500;
}

/* Contact Page */
.contact-section {
    padding: 4rem 0;
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
}

.contact-info h2 {
    margin-bottom: 1.5rem;
}

.contact-details {
    margin: 2rem 0;
}

.contact-item {
    display: flex;
    align-items: center;
    margin-bottom: 1rem;
}

.contact-item i {
    font-size: 1.5rem;
    color: var(--primary-color);
    margin-right: 1rem;
    width: 30px;
}

.social-icons {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
}

.social-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: var(--primary-color);
    color: var(--white);
    font-size: 1.2rem;
    transition: var(--transition);
}

.social-icon:hover {
    background-color: var(--secondary-color);
    transform: translateY(-3px);
}

.contact-form h2 {
    margin-bottom: 1.5rem;
}

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

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--gray);
    border-radius: var(--border-radius);
    font-family: inherit;
    font-size: 1rem;
}

.form-group textarea {
    resize: vertical;
}

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

.faq-section {
    padding: 4rem 0;
    background-color: var(--light-color);
}

.faq-section h2 {
    text-align: center;
    margin-bottom: 3rem;
}

.faq-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 2rem;
}

.faq-item {
    background-color: var(--white);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    box-shadow: var(--shadow);
}

.faq-item h3 {
    margin-bottom: 1rem;
    color: var(--primary-color);
}

/* Blog Page */
.blog-grid {
    padding: 4rem 0;
}

.blog-posts {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.blog-card {
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    background-color: var(--white);
    transition: var(--transition);
}

.blog-card:hover {
    transform: translateY(-10px);
}

.blog-image {
    height: 220px;
    overflow: hidden;
}

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

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

.blog-content {
    padding: 1.5rem;
}

.blog-meta {
    display: flex;
    gap: 1rem;
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
    color: var(--text-light);
}

.blog-category {
    color: var(--primary-color);
    font-weight: 500;
}

.blog-content h2 {
    margin-bottom: 1rem;
    font-size: 1.5rem;
}

.blog-content h2 a {
    color: var(--dark-color);
    transition: var(--transition);
}

.blog-content h2 a:hover {
    color: var(--primary-color);
}

.pagination {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
    margin-top: 3rem;
}

.pagination a {
    display: inline-block;
    padding: 0.5rem 1rem;
    background-color: var(--white);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.pagination a.active {
    background-color: var(--primary-color);
    color: var(--white);
}

.pagination a:hover:not(.active) {
    background-color: var(--light-color);
}

.blog-sidebar {
    padding: 4rem 0;
    background-color: var(--light-color);
}

.sidebar-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.sidebar-section {
    background-color: var(--white);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    box-shadow: var(--shadow);
}

.sidebar-section h3 {
    margin-bottom: 1.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--primary-color);
}

.category-list {
    list-style: none;
    padding: 0;
}

.category-list li {
    margin-bottom: 0.5rem;
}

.category-list a {
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--text-color);
    transition: var(--transition);
}

.category-list a:hover {
    color: var(--primary-color);
    transform: translateX(5px);
}

.popular-post {
    margin-bottom: 1.5rem;
}

.popular-post:last-child {
    margin-bottom: 0;
}

.popular-post h4 {
    margin-bottom: 0.3rem;
    font-size: 1rem;
}

.post-date {
    font-size: 0.9rem;
    color: var(--text-light);
}

.subscribe-form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.subscribe-form input {
    padding: 0.75rem;
    border: 1px solid var(--gray);
    border-radius: var(--border-radius);
    font-family: inherit;
    font-size: 1rem;
}

.subscribe-form input:focus {
    outline: none;
    border-color: var(--primary-color);
}

/* Single Blog Post */
.blog-post {
    padding: 4rem 0;
}

.post-header {
    text-align: center;
    margin-bottom: 3rem;
}

.post-meta {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 1rem;
}

.post-author {
    margin-top: 1rem;
    font-style: italic;
}

.post-image {
    margin-bottom: 3rem;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow);
}

.post-image img {
    width: 100%;
    height: auto;
}

.post-content {
    max-width: 800px;
    margin: 0 auto;
    font-size: 1.1rem;
    line-height: 1.7;
}

.post-content p,
.post-content ul,
.post-content ol {
    margin-bottom: 1.5rem;
}

.post-content h2,
.post-content h3 {
    margin: 2rem 0 1rem;
}

.post-content img {
    max-width: 100%;
    border-radius: var(--border-radius);
    margin: 2rem 0;
}

.post-content blockquote {
    padding: 1.5rem;
    margin: 2rem 0;
    background-color: var(--light-color);
    border-left: 4px solid var(--primary-color);
    font-style: italic;
}

.share-post {
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid var(--gray);
}

.share-post h3 {
    margin-bottom: 1rem;
}

.share-buttons {
    display: flex;
    gap: 1rem;
}

.share-button {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius);
    color: var(--white);
    font-size: 0.9rem;
    transition: var(--transition);
}

.share-button.twitter {
    background-color: #1DA1F2;
}

.share-button.linkedin {
    background-color: #0077B5;
}

.share-button.facebook {
    background-color: #3b5998;
}

.share-button i {
    margin-right: 0.5rem;
}

.share-button:hover {
    transform: translateY(-3px);
}

.post-navigation {
    margin-top: 4rem;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
}

.post-navigation a {
    padding: 1.5rem;
    background-color: var(--light-color);
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.post-navigation a:hover {
    background-color: var(--primary-color);
    color: var(--white);
}

.post-navigation .prev-post {
    text-align: left;
}

.post-navigation .next-post {
    text-align: right;
}

.related-posts {
    margin-top: 4rem;
}

.related-posts h3 {
    margin-bottom: 2rem;
    text-align: center;
}

.related-posts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

/* Footer Styles */
.site-footer {
    background-color: var(--dark-color);
    color: var(--white);
    padding: 4rem 0 2rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 3rem;
}

.footer-grid  h3 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1rem;
    color: white;
}

.footer-logo {
    margin-bottom: 1rem;
    height: 50px;
}

.footer-logo img {
    height: 100%;
    filter: brightness(0) invert(1);
}

.footer-about p {
    margin-bottom: 1.5rem;
}

.footer-heading {
    font-size: 1.2rem;
    color: var(--white);
    margin-bottom: 1.5rem;
    position: relative;
    padding-bottom: 0.5rem;
}

.footer-heading::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 40px;
    height: 2px;
    background-color: var(--primary-color);
}

.footer-links {
    margin-bottom: 0.8rem;
    display: flex;
    align-items: center;
}

.footer-links li {
    margin-bottom: 0.8rem;
}

.footer-links a {
    color: var(--gray-light);
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--primary-color);
    transform: translateX(5px);
}

.footer-contact p {
    margin-bottom: 0.8rem;
    margin-left: 2rem;
    display: flex;
    align-items: center;
}

.footer-contact i {
    margin-right: 0.8rem;
    color: var(--primary-color);
}

.footer-newsletter p {
    margin-bottom: 1.5rem;
}

.newsletter-form {
    display: flex;
}

.newsletter-form input {
    flex: 1;
    padding: 0.75rem;
    border: none;
    border-radius: var(--border-radius) 0 0 var(--border-radius);
    font-family: inherit;
    font-size: 1rem;
}

.newsletter-form button {
    padding: 0.75rem 1rem;
    background-color: var(--primary-color);
    color: var(--white);
    border: none;
    border-radius: 0 var(--border-radius) var(--border-radius) 0;
    cursor: pointer;
    transition: var(--transition);
}

.newsletter-form button:hover {
    background-color: var(--secondary-color);
}

.footer-bottom {
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
}

.footer-social {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.footer-social a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.1);
    color: var(--white);
    font-size: 1.2rem;
    transition: var(--transition);
}

.footer-social a:hover {
    background-color: var(--primary-color);
    transform: translateY(-3px);
}

.copyright {
    color: var(--gray-light);
    font-size: 0.9rem;
}

/* Responsive Styles */
@media (max-width: 1024px) {
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .footer-grid  h3 {
        font-weight: 700;
        line-height: 1.2;
        margin-bottom: 1rem;
        color: white;
    }
}

@media (max-width: 768px) {
    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .circular-content {
        grid-template-columns: 1fr;
    }

    .contact-grid {
        grid-template-columns: 1fr;
    }

    .post-navigation {
        grid-template-columns: 1fr;
    }

    .story-content {
        grid-template-columns: 1fr;
    }

    .hamburger-menu {
        display: block;
    }

    .main-nav {
        position: fixed;
        top: var(--header-height);
        left: -100%;
        width: 80%;
        height: calc(100vh - var(--header-height));
        background-color: var(--white);
        padding: 2rem;
        transition: var(--transition);
        box-shadow: var(--shadow);
    }

    .main-nav.active {
        left: 0;
    }

    .main-nav ul {
        flex-direction: column;
    }

    .main-nav li {
        margin: 0 0 1.5rem 0;
    }
}

@media (max-width: 480px) {
    .footer-grid {
        grid-template-columns: 1fr;
    }

    .footer-grid  h3 {
        font-weight: 700;
        line-height: 1.2;
        margin-bottom: 1rem;
        color: white;
    }

    .hero-buttons {
        flex-direction: column;
    }

    .feature-item {
        grid-template-columns: 1fr;
    }

    .feature-item .feature-icon {
        margin-bottom: 1rem;
    }
}