/* Premium Article Hub & Detail Page Styling */
:root {
    --article-max-width: 780px;
    --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
}

/* Common Layout Elements */
.insights-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 24px 0;
    border-bottom: 1px solid var(--border);
    margin-bottom: 40px;
}

.back-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--text-muted);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    transition: color 0.2s var(--transition-timing);
}

.back-link:hover {
    color: var(--accent);
}

.back-link svg {
    transition: transform 0.2s var(--transition-timing);
}

.back-link:hover svg {
    transform: translateX(-4px);
}

/* Articles List Page (Hub) */
.insights-title-wrapper {
    margin-bottom: 32px;
}

.insights-title {
    font-family: var(--font-heading);
    font-size: 2.5rem;
    font-weight: 700;
    letter-spacing: -0.025em;
    margin-bottom: 8px;
}

.insights-subtitle {
    color: var(--text-muted);
    font-size: 1.125rem;
}

/* Interactive Search & Filters */
.search-filter-wrapper {
    margin-bottom: 40px;
}

.search-input-container {
    position: relative;
    margin-bottom: 20px;
}

.search-input {
    width: 100%;
    padding: 14px 16px 14px 44px;
    background-color: var(--surface);
    border: 1px solid var(--border);
    border-radius: 12px;
    color: var(--text);
    font-family: var(--font-body);
    font-size: 1rem;
    box-shadow: var(--shadow);
    transition: border-color 0.2s, box-shadow 0.2s;
}

.search-input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

.search-icon {
    position: absolute;
    left: 16px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    pointer-events: none;
}

.tags-filter-container {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.tag-badge {
    padding: 6px 14px;
    background-color: var(--surface);
    border: 1px solid var(--border);
    border-radius: 20px;
    color: var(--text-muted);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s var(--transition-timing);
}

.tag-badge:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.tag-badge.active {
    background-color: var(--accent);
    border-color: var(--accent);
    color: #ffffff;
    box-shadow: 0 4px 12px var(--accent-glow);
}

/* Articles Grid */
.articles-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 24px;
    margin-bottom: 60px;
}

@media (min-width: 768px) {
    .articles-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

.article-item-card {
    display: flex;
    flex-direction: column;
    background-color: var(--surface);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 24px;
    text-decoration: none;
    color: inherit;
    box-shadow: var(--shadow);
    transition: transform 0.2s var(--transition-timing), border-color 0.2s var(--transition-timing);
}

.article-item-card:hover {
    transform: translateY(-4px);
    border-color: var(--accent);
}

.article-meta-row {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.article-item-title {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 600;
    line-height: 1.4;
    margin-bottom: 10px;
    color: var(--text);
    transition: color 0.2s;
}

.article-item-card:hover .article-item-title {
    color: var(--accent);
}

.article-item-desc {
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.5;
    margin-bottom: 20px;
    flex-grow: 1;
}

.article-card-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.card-tag {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--text-muted);
    background-color: var(--bg);
    padding: 2px 8px;
    border-radius: 4px;
    border: 1px solid var(--border);
}

/* No Results State */
.no-results-message {
    text-align: center;
    padding: 48px 0;
    color: var(--text-muted);
    font-size: 1.1rem;
}

.no-results-message.is-hidden {
    display: none;
}

/* Article Detail Page Layout */
.article-detail-container {
    max-width: var(--article-max-width);
    margin: 0 auto;
    padding-bottom: 80px;
}

/* Article Hero header */
.article-hero {
    position: relative;
    padding: 48px 0 32px 0;
    border-bottom: 1px solid var(--border);
    margin-bottom: 40px;
}

.article-detail-date {
    display: block;
    font-size: 0.95rem;
    color: var(--text-muted);
    font-weight: 500;
    margin-bottom: 12px;
}

.article-detail-title {
    font-family: var(--font-heading);
    font-size: 2.75rem;
    line-height: 1.2;
    font-weight: 700;
    letter-spacing: -0.03em;
    margin-bottom: 16px;
    color: var(--text);
}

@media (max-width: 640px) {
    .article-detail-title {
        font-size: 2rem;
    }
}

.article-detail-subtitle {
    font-size: 1.25rem;
    line-height: 1.5;
    color: var(--text-muted);
    margin-bottom: 24px;
    font-weight: 400;
}

.article-author-row {
    display: flex;
    align-items: center;
    gap: 12px;
}

.author-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    object-fit: cover;
    border: 1px solid var(--border);
}

.author-meta {
    display: flex;
    flex-direction: column;
}

.author-name {
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--text);
}

.author-title {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* Article Content Typography & Styling */
.article-content {
    font-size: 1.1rem;
    line-height: 1.75;
    color: var(--text);
}

.article-content p {
    margin-bottom: 24px;
}

.article-content h2 {
    font-family: var(--font-heading);
    font-size: 1.75rem;
    font-weight: 600;
    margin-top: 48px;
    margin-bottom: 16px;
    letter-spacing: -0.015em;
}

.article-content h3 {
    font-family: var(--font-heading);
    font-size: 1.35rem;
    font-weight: 600;
    margin-top: 36px;
    margin-bottom: 12px;
}

.article-content strong {
    font-weight: 600;
}

/* Lists */
.article-content ul, .article-content ol {
    margin-bottom: 24px;
    padding-left: 24px;
}

.article-content li {
    margin-bottom: 8px;
}

/* Callouts / Blockquotes */
.article-content blockquote {
    border-left: 4px solid var(--accent);
    padding: 12px 24px;
    margin: 32px 0;
    background-color: var(--surface);
    border-radius: 0 12px 12px 0;
    color: var(--text);
    font-size: 1.05rem;
}

.article-content blockquote p {
    margin-bottom: 0;
}

/* Callout Box (from github alert translations) */
.callout {
    padding: 16px 20px;
    margin: 24px 0;
    border-left: 4px solid;
    border-radius: 0 8px 8px 0;
    background-color: var(--surface);
}

.callout-note { border-color: #2f80ed; }
.callout-tip { border-color: #27ae60; }
.callout-important { border-color: #8e44ad; }
.callout-warning { border-color: #f39c12; }
.callout-caution { border-color: #c0392b; }

/* Table Wrapper for Horizontal Scrolling */
.table-wrapper {
    overflow-x: auto;
    margin: 32px 0;
    border: 1px solid var(--border);
    border-radius: 12px;
    box-shadow: var(--shadow);
}

.article-content table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.95rem;
    text-align: left;
}

.article-content th, .article-content td {
    padding: 14px 18px;
    border-bottom: 1px solid var(--border);
}

.article-content th {
    background-color: var(--surface);
    font-weight: 600;
    color: var(--text);
}

.article-content tr:last-child td {
    border-bottom: none;
}

.article-content tr:nth-child(even) td {
    background-color: var(--surface);
}

/* Fenced Code Blocks & Syntax */
.article-content pre {
    background-color: #0f141c;
    border: 1px solid #1f242c;
    border-radius: 12px;
    padding: 20px;
    margin: 32px 0;
    overflow-x: auto;
    box-shadow: var(--shadow);
}

.article-content code {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    color: var(--text);
    padding: 2px 6px;
    background-color: var(--surface);
    border-radius: 4px;
    border: 1px solid var(--border);
}

.article-content pre code {
    background-color: transparent;
    border: none;
    padding: 0;
    color: #e5e9f0;
    border-radius: 0;
}

/* Figures & Images */
.article-content figure {
    margin: 36px 0;
    text-align: center;
}

.article-content img {
    max-width: 100%;
    height: auto;
    border-radius: 12px;
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
}

.article-content figcaption {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-top: 10px;
    font-style: italic;
}

/* Footer elements */
.article-footer {
    margin-top: 60px;
    padding-top: 24px;
    border-top: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.share-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: none;
    border: 1px solid var(--border);
    color: var(--text-muted);
    padding: 8px 16px;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
}

.share-btn:hover {
    border-color: var(--accent);
    color: var(--accent);
    background-color: var(--surface);
}

/* Toast Message */
.copy-toast {
    position: fixed;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background-color: var(--surface);
    color: var(--text);
    border: 1px solid var(--accent);
    padding: 12px 24px;
    border-radius: 8px;
    font-size: 0.95rem;
    font-weight: 500;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
    transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    z-index: 1000;
}

.copy-toast.show {
    transform: translateX(-50%) translateY(0);
}