/* ===========================================
   Post Layout - Wide content with fixed ToC
   =========================================== */

.post-layout {
    max-width: 1000px;
    margin: 0 auto;
    padding: 2rem;
    position: relative;
}

.post-container {
    width: 100%;
}

/* Reading Progress Bar */
.reading-progress {
    position: fixed;
    top: 0;
    left: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--accent) 0%, var(--accent-dim) 100%);
    width: 0%;
    z-index: 1000;
    transition: width 0.1s ease-out;
}

/* Back Link */
.back-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
    text-decoration: none;
    margin-bottom: 2rem;
    font-size: 0.95rem;
    transition: color 0.2s ease;
}

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

.back-link svg {
    transition: transform 0.2s ease;
}

.back-link:hover svg {
    transform: translateX(-3px);
}

/* Post Header */
.post-header {
    margin-bottom: 2rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--border);
}

.post-meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.meta-separator {
    color: var(--border);
}

.reading-time {
    color: var(--text-secondary);
}

.post-tags {
    color: var(--accent);
    margin-left: 0.5rem;
}

/* ===========================================
   Table of Contents - Fixed sidebar on right
   =========================================== */

.toc {
    position: fixed;
    top: 100px;
    right: 20px;
    width: 260px;
    max-height: calc(100vh - 140px);
    overflow-y: auto;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 1.25rem;
    font-size: 0.85rem;
    z-index: 50;
    scrollbar-width: thin;
    scrollbar-color: var(--border) transparent;
}

.toc::-webkit-scrollbar {
    width: 4px;
}

.toc::-webkit-scrollbar-track {
    background: transparent;
}

.toc::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 2px;
}

.toc-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--border);
}

.toc-title {
    color: var(--accent);
    font-weight: 600;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.toc-toggle {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.25rem;
    border-radius: 4px;
    transition: color 0.2s ease, background 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.toc-toggle:hover {
    color: var(--accent);
    background: var(--bg-tertiary);
}

.toc-list {
    list-style: none;
    margin: 0;
    padding: 0;
}

.toc-list li {
    margin-bottom: 0.4rem;
}

.toc-list a {
    display: block;
    color: var(--text-secondary);
    text-decoration: none;
    padding: 0.3rem 0.5rem;
    border-radius: 4px;
    border-left: 2px solid transparent;
    transition: all 0.2s ease;
    line-height: 1.4;
}

.toc-list a:hover {
    color: var(--text-primary);
    background: var(--bg-tertiary);
}

.toc-list a.active {
    color: var(--accent);
    border-left-color: var(--accent);
    background: rgba(251, 191, 36, 0.1);
}

/* ToC indentation levels */
.toc-level-1 a { padding-left: 0.5rem; font-weight: 500; }
.toc-level-2 a { padding-left: 1rem; }
.toc-level-3 a { padding-left: 1.5rem; font-size: 0.8rem; }
.toc-level-4 a { padding-left: 2rem; font-size: 0.75rem; }

/* Collapsed state */
.toc.collapsed .toc-list {
    display: none;
}

.toc.collapsed .toc-toggle svg {
    transform: rotate(-90deg);
}

/* ===========================================
   Heading Anchors
   =========================================== */

.heading-anchor {
    opacity: 0;
    color: var(--accent);
    text-decoration: none;
    margin-left: 0.5rem;
    font-weight: 400;
    transition: opacity 0.2s ease;
}

.blog-post-content h1:hover .heading-anchor,
.blog-post-content h2:hover .heading-anchor,
.blog-post-content h3:hover .heading-anchor,
.blog-post-content h4:hover .heading-anchor {
    opacity: 1;
}

.heading-anchor:hover {
    text-decoration: underline;
}

/* ===========================================
   Code Block Wrapper with Copy Button
   =========================================== */

.code-block-wrapper {
    position: relative;
    margin: 1.5rem 0;
}

.copy-button {
    position: absolute;
    top: 0.75rem;
    right: 0.75rem;
    display: flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.4rem 0.65rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 4px;
    color: var(--text-secondary);
    font-size: 0.75rem;
    font-family: inherit;
    cursor: pointer;
    opacity: 0;
    transition: all 0.2s ease;
    z-index: 10;
}

.code-block-wrapper:hover .copy-button {
    opacity: 1;
}

.copy-button:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border-color: var(--accent);
}

.copy-button.copied {
    color: #22c55e;
    border-color: #22c55e;
}

.copy-text {
    font-weight: 500;
}

/* ===========================================
   Blog Post Content Typography
   =========================================== */

.blog-post-content {
    color: var(--text-secondary);
    line-height: 1.8;
    font-size: 1.05rem;
}

.blog-post-content > *:first-child {
    margin-top: 0;
}

.blog-post-content h1 {
    font-size: 2.25rem;
    margin-top: 0;
    margin-bottom: 1.5rem;
    color: var(--accent);
    border-bottom: 2px solid var(--accent-dim);
    padding-bottom: 0.75rem;
    line-height: 1.3;
}

.blog-post-content h2 {
    font-size: 1.65rem;
    margin-top: 3rem;
    margin-bottom: 1rem;
    color: var(--accent);
    padding-top: 1rem;
    border-top: 1px solid var(--border);
}

.blog-post-content h2:first-of-type {
    border-top: none;
    padding-top: 0;
}

.blog-post-content h3 {
    font-size: 1.35rem;
    margin-top: 2rem;
    margin-bottom: 0.75rem;
    color: var(--accent);
}

.blog-post-content h4 {
    font-size: 1.15rem;
    margin-top: 1.5rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.blog-post-content p {
    margin-bottom: 1.25rem;
}

.blog-post-content a {
    color: var(--accent);
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition: border-color 0.2s ease;
}

.blog-post-content a:hover {
    border-bottom-color: var(--accent);
}

.blog-post-content strong {
    color: var(--text-primary);
    font-weight: 600;
}

.blog-post-content em {
    font-style: italic;
}

/* Lists */
.blog-post-content ul,
.blog-post-content ol {
    margin-left: 1.5rem;
    margin-bottom: 1.25rem;
    padding-left: 0.5rem;
}

.blog-post-content li {
    margin-bottom: 0.5rem;
    line-height: 1.7;
}

.blog-post-content li::marker {
    color: var(--accent);
}

/* Inline Code */
.blog-post-content code {
    background: var(--bg-tertiary);
    padding: 0.2rem 0.45rem;
    border-radius: 4px;
    font-family: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;
    font-size: 0.875em;
    color: var(--accent);
    border: 1px solid var(--border);
}

/* Code blocks - override inline styles */
.blog-post-content pre code {
    background: transparent;
    padding: 0;
    border: none;
    color: inherit;
    font-size: 0.9rem;
}

.blog-post-content .codehilite {
    margin: 0;
}

.code-block-wrapper .codehilite {
    margin: 0;
    border-radius: 8px;
}

/* Blockquotes */
.blog-post-content blockquote {
    border-left: 4px solid var(--accent);
    padding: 0.75rem 1.25rem;
    margin: 1.5rem 0;
    background: var(--bg-secondary);
    border-radius: 0 8px 8px 0;
    color: var(--text-secondary);
}

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

.blog-post-content blockquote p + p {
    margin-top: 0.75rem;
}

/* Images */
.blog-post-content img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    margin: 2rem auto;
    display: block;
    border: 1px solid var(--border);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

/* Tables */
.blog-post-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.5rem 0;
    font-size: 0.95rem;
}

.blog-post-content th,
.blog-post-content td {
    padding: 0.75rem 1rem;
    border: 1px solid var(--border);
    text-align: left;
}

.blog-post-content th {
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-weight: 600;
}

.blog-post-content tr:nth-child(even) {
    background: var(--bg-secondary);
}

/* Horizontal Rule */
.blog-post-content hr {
    border: none;
    height: 1px;
    background: var(--border);
    margin: 3rem 0;
}

/* Post Footer */
.post-footer {
    margin-top: 4rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border);
}

.post-nav {
    display: flex;
    justify-content: flex-start;
}

.post-nav .btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.5rem;
}

/* ===========================================
   Responsive Design
   =========================================== */

/* Large screens - ToC visible, wide content */
@media (min-width: 1400px) {
    .post-layout {
        max-width: 1100px;
    }
    
    .toc {
        right: calc((100vw - 1100px) / 2 - 280px);
    }
}

/* Medium-large screens - ToC still visible but closer */
@media (max-width: 1399px) and (min-width: 1100px) {
    .toc {
        right: 15px;
        width: 240px;
        font-size: 0.8rem;
    }
}

/* Hide ToC when viewport too narrow for it */
@media (max-width: 1099px) {
    .toc {
        display: none;
    }
    
    .post-layout {
        max-width: 850px;
    }
}

/* Tablet */
@media (max-width: 900px) {
    .post-layout {
        padding: 1.5rem;
        max-width: 100%;
    }
    
    .blog-post-content h1 {
        font-size: 1.85rem;
    }
    
    .blog-post-content h2 {
        font-size: 1.45rem;
    }
    
    .blog-post-content h3 {
        font-size: 1.2rem;
    }
    
    .blog-post-content {
        font-size: 1rem;
    }
}

/* Mobile */
@media (max-width: 640px) {
    .post-layout {
        padding: 1rem;
    }
    
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--bg-secondary);
        flex-direction: column;
        padding: 1rem;
        border-bottom: 1px solid var(--border);
        gap: 0.5rem;
    }
    
    .nav-links.mobile-open {
        display: flex;
    }
    
    .mobile-menu-toggle {
        display: block;
    }
    
    .nav-container {
        position: relative;
    }
    
    .post-meta {
        font-size: 0.85rem;
    }
    
    .copy-button {
        opacity: 1;
    }
    
    .blog-post-content h1 {
        font-size: 1.5rem;
    }
    
    .blog-post-content pre {
        font-size: 0.8rem;
    }
    
    .code-block-wrapper .codehilite {
        border-radius: 4px;
    }
}

/* ===========================================
   Print Styles
   =========================================== */

@media print {
    .toc,
    .back-link,
    .reading-progress,
    .copy-button,
    .heading-anchor,
    .nav,
    .footer,
    .post-footer {
        display: none !important;
    }
    
    .post-layout {
        max-width: 100%;
        padding: 0;
    }
    
    .blog-post-content {
        color: #000;
    }
    
    .blog-post-content a {
        color: #000;
        text-decoration: underline;
    }
    
    .blog-post-content code {
        background: #f5f5f5;
        border-color: #ddd;
    }
}