/* --- Main Layout: 2-Column --- */
.post-container {
    display: grid;
    grid-template-columns: 1fr 320px;
    gap: 28px;
    max-width: var(--max-width);
    margin: 28px auto;
    padding: 0 24px;
    align-items: start;
}

/* --- Article Body --- */
.main-article {
    background-color: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 34px;
}

.article-hero-image {
    width: 100%;
    max-height: 420px;
    object-fit: cover;
    border-radius: var(--radius-sm);
    margin-bottom: 22px;
    display: block;
}

.main-article h1 {
    font-size: 1.9rem;
    line-height: 1.2;
    text-transform: uppercase;
    margin: 0 0 8px;
}

.main-article h2 {
    margin: 28px 0 12px;
}

.main-article h3 {
    margin: 24px 0 10px;
    font-size: 1.15rem;
}

.main-article h4 {
    margin: 20px 0 8px;
}

.main-article ul,
.main-article ol {
    padding-left: 22px;
}

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

.article-sub-image {
    width: 100%;
    max-width: 520px;
    border-radius: var(--radius-sm);
    margin: 8px 0 16px;
    display: block;
    box-shadow: var(--shadow);
}

.main-article code {
    background-color: var(--bg-soft);
    border: 1px solid var(--border);
    border-radius: 5px;
    padding: 2px 6px;
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    font-size: 0.88em;
    color: #c13500;
}

/* --- macOS-style code window --- */
.code-window {
    background-color: var(--code-bg);
    border-radius: var(--radius-sm);
    overflow: hidden;
    margin: 18px 0;
    box-shadow: var(--shadow);
}

.code-title-bar {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 14px;
    background-color: var(--code-bar);
}

.code-title-bar .dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    display: inline-block;
}

.dot.red { background-color: #ff5f57; }
.dot.yellow { background-color: #febc2e; }
.dot.green { background-color: #28c840; }

.code-title-bar .code-name {
    margin-left: 8px;
    font-size: 0.78rem;
    color: #9aa0b4;
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

.code-window pre {
    margin: 0;
    padding: 18px;
    overflow-x: auto;
    background: transparent;
    border: none;
}

.code-window pre code {
    background: transparent;
    border: none;
    padding: 0;
    color: #e8eaf0;
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    font-size: 0.9rem;
    line-height: 1.6;
}

/* --- Key Takeaways box --- */
.key-takeaways {
    background-color: var(--accent-soft);
    border: 1px solid var(--accent-border);
    border-left: 5px solid var(--accent);
    border-radius: var(--radius-sm);
    padding: 20px 24px;
    margin: 24px 0;
}

.key-takeaways h4 {
    margin: 0 0 10px;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: #8a6d00;
}

.key-takeaways ul {
    margin: 0;
    padding-left: 20px;
}

.key-takeaways li {
    margin-bottom: 6px;
    color: #5c4d00;
}

/* --- Post navigation (prev / next) --- */
.post-nav {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin: 28px 0 8px;
}

.post-nav a {
    background-color: var(--bg-soft);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 14px 18px;
    transition: background-color 0.2s ease, box-shadow 0.2s ease;
}

.post-nav a:hover {
    background-color: var(--accent-soft);
    text-decoration: none;
    box-shadow: var(--shadow);
}

.post-nav .nav-label {
    display: block;
    font-size: 0.72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-muted);
    margin-bottom: 4px;
}

.post-nav .nav-title {
    font-weight: 700;
    font-size: 0.9rem;
    color: var(--text-main);
}

.post-nav a.next {
    text-align: right;
}

/* --- Comments --- */
.disqus-heading h4 {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-muted);
    margin: 0 0 16px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--accent);
    display: inline-block;
}

/* --- Back link --- */
.back-link {
    display: inline-block;
    font-weight: 700;
    color: var(--text-muted);
    margin: 20px 0 0;
}

.back-link:hover {
    color: var(--accent-dark);
    text-decoration: none;
}

/* --- Article Responsive --- */
@media (max-width: 980px) {
    .post-container {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 640px) {
    .main-article {
        padding: 22px;
    }

    .main-article h1 {
        font-size: 1.4rem;
    }

    .post-nav {
        grid-template-columns: 1fr;
    }

    .post-nav a.next {
        text-align: left;
    }

    .post-container {
        padding: 0 16px;
    }
}