/* =====================================================================
   article.css — shared reading template for blog posts (blogs/*.html).
   Extracted from the per-post <style> blocks so every article shares one
   consistent layout. Linked after base.css.
   ===================================================================== */

.article-header {
    margin-bottom: 3rem;
    border-bottom: 2px solid var(--color-dark-teal);
    padding-bottom: 2rem;
}

.article-date {
    color: var(--color-light-teal);
    font-size: 0.95rem;
    font-weight: bold;
    margin-bottom: 0.8rem;
}

.article-title {
    font-size: 2.5rem;
    color: var(--color-light-teal);
    margin-bottom: 1rem;
    font-weight: 600;
    line-height: 1.2;
}

.article-excerpt {
    color: rgba(245, 245, 245, 0.85);
    font-size: 1.1rem;
    font-style: italic;
    margin-bottom: 1rem;
}

.article-tags {
    display: flex;
    gap: 0.8rem;
    flex-wrap: wrap;
}

.article-content {
    color: rgba(245, 245, 245, 0.9);
    line-height: 1.8;
}

.article-content h2 {
    font-size: 1.8rem;
    color: var(--color-light-teal);
    margin: 2rem 0 1rem 0;
    border-left: 4px solid var(--color-dark-teal);
    padding-left: 1rem;
}

.article-content h3 {
    font-size: 1.3rem;
    color: var(--color-light-teal);
    margin: 1.5rem 0 0.8rem 0;
}

.article-content h4 {
    font-size: 1.1rem; color: var(--color-light-teal); margin: 1.2rem 0 0.6rem 0;
}

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

.article-content ul, .article-content ol {
    margin: 1.2rem 0 1.2rem 2rem;
}

.article-content li {
    margin-bottom: 0.6rem;
}

.article-content strong {
    color: var(--color-light-teal);
    font-weight: 600;
}

.article-content em {
    color: rgba(47, 184, 170, 0.8);
    font-style: italic;
}

.article-content code {
    background-color: rgba(10, 10, 10, 0.6);
    color: var(--color-light-teal);
    padding: 0.2rem 0.5rem;
    border-radius: 3px;
    font-family: "Courier New", monospace;
    font-size: 0.9rem;
}

.article-content ol li:target {
    background-color: rgba(47, 184, 170, 0.15);
    border-left: 3px solid var(--color-light-teal);
    padding-left: 0.5rem;
    transition: background-color 0.5s ease;
}

.math-block {
    background-color: rgba(26, 77, 79, 0.2);
    border-left: 4px solid var(--color-light-teal);
    padding: 1.5rem;
    margin: 1.5rem 0;
    border-radius: 4px;
    overflow-x: auto;
}

.article-nav {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 2px solid var(--color-dark-teal);
}

.nav-link {
    display: inline-flex;
    align-items: center;
    padding: 0.8rem 1.5rem;
    background-color: rgba(26, 77, 79, 0.2);
    border: 1px solid var(--color-dark-teal);
    color: var(--color-light-teal);
    text-decoration: none;
    border-radius: 4px;
    transition: all 0.3s ease;
    font-weight: 500;
}

.nav-link:hover {
    background-color: rgba(26, 77, 79, 0.35);
    border-color: var(--color-light-teal);
    transform: translateY(-2px);
}

.nav-link.back {
    margin-left: 0;
}

.nav-link.next {
    margin-left: auto;
}

.toc-container {
    background-color: rgba(26, 77, 79, 0.15);
    border: 1px solid var(--color-dark-teal);
    border-radius: 4px;
    padding: 1.5rem;
    margin-bottom: 2rem;
}

.toc-container h2 {
    font-size: 1.5rem;
    color: var(--color-light-teal);
    margin: 0 0 1rem 0;
    border-bottom: 1px solid var(--color-dark-teal);
    padding: 0 0 0.5rem 0;
    border-left: none;
}

.toc-container ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.toc-container li {
    position: relative;
    padding-left: 1.5rem;
    margin-bottom: 0;
}

.toc-container li::before {
    content: "\2022";
    position: absolute;
    left: 0;
    color: var(--color-light-teal);
}

.toc-container a {
    color: var(--color-white);
    text-decoration: none;
    transition: color 0.3s ease;
    font-size: 1.05rem;
}

.toc-container a:hover {
    color: var(--color-light-teal);
}

.info-table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.5rem 0;
}

.info-table th, .info-table td {
    border: 1px solid var(--color-dark-teal);
    padding: 0.75rem 1rem;
    text-align: left;
}

.info-table th {
    background-color: rgba(26, 77, 79, 0.4);
    color: var(--color-light-teal);
    font-weight: 600;
}

.info-table td {
    background-color: rgba(26, 77, 79, 0.1);
}

.info-table tr:hover td {
    background-color: rgba(26, 77, 79, 0.25);
}

.cite {
    color: var(--color-light-teal);
    text-decoration: none;
    cursor: pointer;
    font-weight: 600;
    transition:
      color 0.2s ease,
      text-shadow 0.2s ease;
}

.cite:hover {
    color: var(--color-white);
    text-shadow: 0 0 8px rgba(47, 184, 170, 0.6);
}

.figure-container {
    margin: 2rem 0; text-align: center;
}

.figure-container img {
    width: 100%; max-width: 750px; border-radius: 8px; border: 1px solid var(--color-dark-teal); box-shadow: 0 4px 20px rgba(47,184,170,0.15);
}

.figure-caption {
    color: rgba(245,245,245,0.5); font-size: 0.8rem; margin-top: 0.5rem; font-style: italic;
}