:root {
    --primary: #0d6e6e;
    --primary-light: #14919b;
    --accent: #38a169;
    --text: #1a202c;
    --text-light: #4a5568;
    --bg: #ffffff;
    --bg-light: #f0fff4;
    --bg-blue: #ebf8ff;
    --border: #e2e8f0;
    --max-width: 900px;
}

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

body {
    font-family: "Georgia", "Times New Roman", serif;
    color: var(--text);
    background: var(--bg);
    line-height: 1.8;
    font-size: 1.05rem;
}

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

.site-header {
    background: var(--primary);
    color: white;
    padding: 1rem 0;
}

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

.logo {
    color: white;
    text-decoration: none;
    font-size: 1.3rem;
    font-weight: 700;
}

.main-nav a {
    color: rgba(255,255,255,0.85);
    text-decoration: none;
    margin-left: 1.5rem;
    font-size: 0.9rem;
}

.main-nav a:hover { color: white; }

.hero {
    text-align: center;
    padding: 3rem 0;
    border-bottom: 1px solid var(--border);
    margin-bottom: 2rem;
}

.hero h1 {
    font-size: 2rem;
    color: var(--primary);
    margin-bottom: 0.5rem;
}

.hero p {
    color: var(--text-light);
    font-size: 1.1rem;
    max-width: 650px;
    margin: 0 auto;
}

.article-list {
    list-style: none;
    margin-bottom: 3rem;
}

.article-list li {
    border-bottom: 1px solid var(--border);
    padding: 1.5rem 0;
}

.article-list h3 {
    font-size: 1.3rem;
    margin-bottom: 0.3rem;
}

.article-list h3 a {
    color: var(--text);
    text-decoration: none;
}

.article-list h3 a:hover { color: var(--primary); }

.article-list .meta {
    font-size: 0.85rem;
    color: var(--text-light);
    font-family: -apple-system, BlinkMacSystemFont, sans-serif;
}

.article-list .excerpt {
    color: var(--text-light);
    font-size: 0.95rem;
    margin-top: 0.4rem;
}

.category-tag {
    display: inline-block;
    background: var(--bg-blue);
    color: var(--primary);
    font-size: 0.75rem;
    padding: 0.1rem 0.5rem;
    border-radius: 3px;
    font-family: -apple-system, BlinkMacSystemFont, sans-serif;
    text-transform: uppercase;
    font-weight: 600;
    letter-spacing: 0.5px;
}

/* Article */
.article-single {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 2rem 1.5rem 4rem;
}

.article-single header {
    margin-bottom: 2rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--border);
}

.article-single h1 {
    font-size: 2.2rem;
    line-height: 1.3;
    color: var(--primary);
    margin: 0.5rem 0;
}

.article-single .meta {
    font-size: 0.85rem;
    color: var(--text-light);
    font-family: -apple-system, BlinkMacSystemFont, sans-serif;
}

.key-takeaways {
    background: var(--bg-light);
    border: 1px solid #c6f6d5;
    border-radius: 8px;
    padding: 1.5rem;
    margin-bottom: 2rem;
}

.key-takeaways h2 {
    font-size: 1.1rem;
    color: var(--accent);
    margin-bottom: 0.8rem;
    font-family: -apple-system, BlinkMacSystemFont, sans-serif;
}

.article-content h2 {
    font-size: 1.6rem;
    margin: 2.5rem 0 0.8rem;
    color: var(--primary);
}

.article-content h3 {
    font-size: 1.25rem;
    margin: 1.8rem 0 0.6rem;
}

.article-content p {
    margin-bottom: 1.2rem;
}

.article-content a {
    color: var(--primary-light);
}

.article-content ul, .article-content ol {
    margin: 0 0 1.2rem 1.5rem;
}

.article-content blockquote {
    border-left: 4px solid var(--primary);
    padding: 1rem 1.5rem;
    margin: 1.5rem 0;
    background: var(--bg-blue);
    border-radius: 0 6px 6px 0;
    font-style: italic;
}

.article-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.5rem 0;
    font-size: 0.9rem;
    font-family: -apple-system, BlinkMacSystemFont, sans-serif;
}

.article-content th {
    background: var(--primary);
    color: white;
    padding: 0.6rem 1rem;
    text-align: left;
}

.article-content td {
    padding: 0.5rem 1rem;
    border-bottom: 1px solid var(--border);
}

.article-tags {
    margin-top: 2rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border);
}

.article-tags span {
    display: inline-block;
    padding: 0.15rem 0.6rem;
    background: var(--bg-light);
    border: 1px solid #c6f6d5;
    border-radius: 3px;
    font-size: 0.8rem;
    color: var(--text-light);
    margin: 0.2rem;
    font-family: -apple-system, BlinkMacSystemFont, sans-serif;
}

.site-footer {
    background: var(--bg-light);
    border-top: 1px solid var(--border);
    padding: 2rem 0;
    text-align: center;
    color: var(--text-light);
    font-size: 0.85rem;
    font-family: -apple-system, BlinkMacSystemFont, sans-serif;
}

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

.featured-image img {
    width: 100%;
    border-radius: 6px;
}

@media (max-width: 768px) {
    .article-single h1 { font-size: 1.6rem; }
    .hero h1 { font-size: 1.5rem; }
}