/* --- Article Detail Page --- */

.article-briefing {
    max-width: 1200px;
    margin: 40px auto;
    padding: 0 5%;
    animation: fadeIn 0.8s ease-out;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.article-briefing .briefing-header {
    margin-bottom: 40px;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 20px;
}

.article-briefing .back-link {
    background: none;
    border: none;
    color: var(--accent-blue);
    font-family: 'Space Mono', monospace;
    font-size: 0.75rem;
    cursor: pointer;
    margin-bottom: 10px;
    padding: 0;
    transition: letter-spacing 0.3s;
    /* See project.css — <button> became <a>; restore block spacing and drop
       the default underline so the terminal-style label is unchanged. */
    display: inline-block;
    text-decoration: none;
}

.article-briefing .back-link:hover {
    letter-spacing: 1px;
    color: var(--text-main);
}

.article-meta {
    display: flex;
    align-items: center;
    gap: 15px;
    margin: 15px 0 10px;
}

.article-meta .category-badge {
    font-family: 'Space Mono', monospace;
    font-size: 0.65rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    padding: 4px 10px;
    border-radius: 3px;
    border: 1px solid var(--accent-blue);
    color: var(--accent-blue);
    background: rgba(0, 123, 255, 0.1);
}

.article-meta .article-date {
    font-family: 'Space Mono', monospace;
    font-size: 0.7rem;
    color: var(--text-dim);
}

.article-briefing .briefing-header h1 {
    font-size: clamp(2rem, 5vw, 3rem);
    letter-spacing: -1px;
    margin: 10px 0;
}

/* Two-column layout */
.article-layout {
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: 50px;
    align-items: start;
}

/* Article content typography */
.article-content {
    line-height: 1.8;
    font-size: 1.05rem;
}

.article-content h2 {
    font-size: 1.6rem;
    margin: 40px 0 15px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--border-color);
}

.article-content h3 {
    font-size: 1.25rem;
    margin: 30px 0 12px;
    color: var(--accent-blue);
}

.article-content p {
    margin-bottom: 18px;
    color: var(--text-main);
}

.article-content ul,
.article-content ol {
    margin: 15px 0 20px 25px;
    color: var(--text-dim);
}

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

.article-content code {
    font-family: 'Space Mono', monospace;
    font-size: 0.85em;
    background: rgba(255, 255, 255, 0.06);
    padding: 2px 6px;
    border-radius: 3px;
    border: 1px solid var(--border-color);
}

.article-content pre {
    background: #000;
    border: 1px solid var(--border-color);
    border-left: 3px solid var(--accent-blue);
    padding: 20px;
    margin: 20px 0;
    overflow-x: auto;
    font-family: 'Space Mono', monospace;
    font-size: 0.85rem;
    line-height: 1.6;
}

.article-content pre code {
    background: none;
    border: none;
    padding: 0;
}

.article-content blockquote {
    border-left: 3px solid var(--accent-blue);
    padding: 15px 20px;
    margin: 20px 0;
    background: rgba(0, 123, 255, 0.05);
    color: var(--text-dim);
    font-style: italic;
}

/* Sidebar */
.article-sidebar {
    position: sticky;
    top: 30px;
}

.tags-box {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    padding: 25px;
}

.tags-box label {
    display: block;
    font-family: 'Space Mono', monospace;
    font-size: 0.7rem;
    color: var(--accent-blue);
    margin-bottom: 15px;
    letter-spacing: 1.5px;
    text-transform: uppercase;
}

.tag-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.tag-list .tag {
    font-family: 'Space Mono', monospace;
    font-size: 0.7rem;
    color: var(--text-dim);
    background: rgba(255, 255, 255, 0.05);
    padding: 5px 10px;
    border-radius: 3px;
    border: 1px solid var(--border-color);
}

/* Responsive */
@media (max-width: 900px) {
    .article-layout {
        grid-template-columns: 1fr;
    }

    .article-sidebar {
        position: static;
    }
}