:root {
    --primary-blue: #2563eb;
    --dark-blue: #1e40af;
    --light-blue: #eff6ff;
    --success-green: #10b981;
    --white: #ffffff;
    --text-gray: #4b5563;
    --dark-gray: #1f2937;
    --border-light: #e5e7eb;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 25px rgba(0,0,0,0.15);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--dark-gray);
    background-color: #fafafa;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.main-header {
    background-color: var(--white);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

.logo-section {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.site-logo {
    width: 50px;
    height: 50px;
    border-radius: 8px;
    object-fit: cover;
}

.site-title {
    font-size: 1.5rem;
    color: var(--dark-blue);
    font-weight: 700;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-menu a {
    text-decoration: none;
    color: var(--text-gray);
    font-weight: 500;
    transition: color 0.3s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

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

.hero-banner {
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--dark-blue) 100%);
    color: var(--white);
    padding: 5rem 0;
}

.hero-content {
    max-width: 700px;
}

.hero-title {
    font-size: 3rem;
    margin-bottom: 1.5rem;
    color: var(--white);
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 1.3rem;
    margin-bottom: 2rem;
    opacity: 0.95;
}

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

.btn-primary,
.btn-secondary {
    padding: 1rem 2rem;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    display: inline-block;
}

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

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

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

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

.hero-image {
    margin-top: 2rem;
}

.hero-image img {
    width: 100%;
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
}

.tip-of-day {
    background-color: #fef3c7;
    padding: 2rem 0;
}

.tip-card {
    display: flex;
    align-items: center;
    gap: 2rem;
    padding: 2rem;
    background-color: var(--white);
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
}

.tip-icon {
    font-size: 3rem;
    color: #f59e0b;
}

.tip-content h3 {
    color: var(--dark-blue);
    margin-bottom: 0.5rem;
}

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

.section-header h1 {
    font-size: 2.5rem;
    color: var(--dark-blue);
    margin-bottom: 1rem;
}

.section-intro {
    font-size: 1.2rem;
    color: var(--text-gray);
}

.info-section,
.technical-section,
.environmental-impact,
.latest-posts {
    padding: 5rem 0;
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2.5rem;
}

.info-block {
    background-color: var(--white);
    padding: 2.5rem;
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
}

.info-block:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.info-icon {
    font-size: 3rem;
    color: var(--primary-blue);
    margin-bottom: 1.5rem;
}

.info-block h3 {
    color: var(--dark-blue);
    margin-bottom: 1rem;
    font-size: 1.5rem;
}

.info-details ul {
    list-style: none;
    margin-top: 1rem;
}

.info-details li {
    padding: 0.5rem 0;
    padding-left: 1.5rem;
    position: relative;
}

.info-details li:before {
    content: "→";
    position: absolute;
    left: 0;
    color: var(--primary-blue);
}

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

.tech-visual img {
    width: 100%;
    border-radius: 12px;
    box-shadow: var(--shadow-md);
}

.process-steps {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.process-step {
    display: flex;
    gap: 1.5rem;
    align-items: flex-start;
}

.step-number {
    background-color: var(--primary-blue);
    color: var(--white);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    flex-shrink: 0;
}

.step-content h4 {
    color: var(--dark-blue);
    margin-bottom: 0.5rem;
}

.impact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2.5rem;
}

.impact-card {
    background-color: var(--white);
    padding: 2.5rem;
    border-radius: 12px;
    text-align: center;
    box-shadow: var(--shadow-sm);
}

.impact-icon {
    font-size: 3.5rem;
    color: var(--success-green);
    margin-bottom: 1.5rem;
}

.posts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2.5rem;
}

.post-preview {
    background-color: var(--white);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
}

.post-preview:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.post-image img {
    width: 100%;
    height: 250px;
    object-fit: cover;
}

.post-content {
    padding: 2rem;
}

.post-content h3 {
    color: var(--dark-blue);
    margin-bottom: 1rem;
}

.read-more {
    color: var(--primary-blue);
    text-decoration: none;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: gap 0.3s ease;
}

.read-more:hover {
    gap: 1rem;
}

.view-all-posts {
    text-align: center;
    margin-top: 3rem;
}

.main-footer {
    background-color: var(--dark-gray);
    color: var(--white);
    padding: 4rem 0 2rem;
}

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

.footer-col h4 {
    color: var(--white);
    margin-bottom: 1.5rem;
}

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

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

.footer-col a {
    color: rgba(255,255,255,0.8);
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-col a:hover {
    color: var(--white);
}

.contact-info li {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    color: rgba(255,255,255,0.8);
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255,255,255,0.1);
    color: rgba(255,255,255,0.7);
}

.cookie-banner {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background-color: var(--white);
    box-shadow: 0 -4px 6px rgba(0,0,0,0.1);
    padding: 2rem;
    z-index: 9999;
    display: none;
}

.cookie-banner.show {
    display: block;
}

.cookie-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 2rem;
}

.cookie-text h4 {
    color: var(--dark-blue);
    margin-bottom: 0.5rem;
}

.cookie-text a {
    color: var(--primary-blue);
}

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

.cookie-btn {
    padding: 0.8rem 1.5rem;
    border: none;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

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

.cookie-btn.accept:hover {
    background-color: var(--dark-blue);
}

.cookie-btn.reject {
    background-color: var(--border-light);
    color: var(--text-gray);
}

.cookie-btn.reject:hover {
    background-color: #d1d5db;
}

.blog-post-detail {
    padding: 3rem 0;
    background-color: var(--white);
}

.post-breadcrumb {
    color: var(--text-gray);
    margin-bottom: 1.5rem;
}

.post-breadcrumb a {
    color: var(--primary-blue);
    text-decoration: none;
}

.post-title {
    font-size: 2.8rem;
    color: var(--dark-blue);
    margin-bottom: 1rem;
    line-height: 1.2;
}

.post-meta {
    display: flex;
    gap: 2rem;
    color: var(--text-gray);
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.post-featured-image {
    margin: 2rem 0;
}

.post-featured-image img {
    width: 100%;
    border-radius: 12px;
    box-shadow: var(--shadow-md);
}

.post-content-wrapper {
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: 3rem;
    margin-top: 2rem;
}

.post-content {
    line-height: 1.9;
}

.lead-paragraph {
    font-size: 1.2rem;
    color: var(--text-gray);
    margin-bottom: 2rem;
    font-weight: 500;
}

.post-content h2 {
    color: var(--dark-blue);
    margin-top: 2.5rem;
    margin-bottom: 1rem;
    font-size: 2rem;
}

.post-content h3 {
    color: var(--dark-blue);
    margin-top: 2rem;
    margin-bottom: 0.8rem;
    font-size: 1.5rem;
}

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

.post-content ul,
.post-content ol {
    margin-left: 2rem;
    margin-bottom: 1.5rem;
}

.post-content li {
    margin-bottom: 0.5rem;
}

.info-box,
.tip-box,
.calculation-box {
    background-color: var(--light-blue);
    padding: 1.5rem;
    border-radius: 8px;
    margin: 2rem 0;
    border-left: 4px solid var(--primary-blue);
}

.comparison-table table {
    width: 100%;
    border-collapse: collapse;
    margin: 2rem 0;
}

.comparison-table th,
.comparison-table td {
    padding: 1rem;
    text-align: left;
    border: 1px solid var(--border-light);
}

.comparison-table thead {
    background-color: var(--light-blue);
}

.total-row,
.avoided-row,
.result-row {
    font-weight: bold;
}

.result-row {
    background-color: #d1fae5;
}

.post-sidebar {
    position: sticky;
    top: 100px;
    height: fit-content;
}

.sidebar-widget {
    background-color: var(--light-blue);
    padding: 1.5rem;
    border-radius: 8px;
    margin-bottom: 2rem;
}

.sidebar-widget h3 {
    color: var(--dark-blue);
    margin-bottom: 1rem;
}

.author-box {
    text-align: center;
}

.author-box img {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    margin-bottom: 1rem;
    object-fit: cover;
}

.related-posts,
.categories {
    list-style: none;
}

.related-posts li,
.categories li {
    margin-bottom: 0.8rem;
}

.related-posts a,
.categories a {
    color: var(--text-gray);
    text-decoration: none;
    transition: color 0.3s ease;
}

.related-posts a:hover,
.categories a:hover {
    color: var(--primary-blue);
}

@media (max-width: 968px) {
    .header-content {
        flex-direction: column;
        gap: 1rem;
    }

    .nav-menu {
        flex-direction: column;
        gap: 0.5rem;
        text-align: center;
    }

    .hero-title {
        font-size: 2rem;
    }

    .technical-content,
    .post-content-wrapper {
        grid-template-columns: 1fr;
    }

    .cookie-content {
        flex-direction: column;
    }
}

@media (max-width: 768px) {
    .hero-cta {
        flex-direction: column;
    }

    .tip-card {
        flex-direction: column;
        text-align: center;
    }
}