/* ============================================================
   Post Reading Experience
   Inspired by: anthropic.com/institute longform layout
   - Narrow reading column for prose
   - Serif body text
   - Generous spacing
   - Rich content blocks (callouts, figures, pull quotes)
   - Scroll progress bar
   - Table of contents
   ============================================================ */

/* --- Reading column --- */
.post-reading {
    max-width: 680px;
    margin: 0 auto;
    padding: 2rem 1.5rem 4rem;
    line-height: 1.8;
    font-size: 1.125rem;
    color: #e8e6e3;
}

/* --- Typography --- */
.post-reading h1,
.post-reading h2,
.post-reading h3,
.post-reading h4 {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: #ffffff;
    margin-top: 2.5em;
    margin-bottom: 0.6em;
    line-height: 1.25;
}

.post-reading h1 {
    font-size: 2.25rem;
    margin-top: 0;
    letter-spacing: -0.03em;
}

.post-reading h2 {
    font-size: 1.5rem;
    padding-top: 1rem;
    border-top: 1px solid rgba(255,255,255,0.08);
}

.post-reading h3 {
    font-size: 1.2rem;
}

.post-reading p,
.post-reading li {
    font-family: Georgia, 'Times New Roman', serif;
    color: #d4d0cb;
}

.post-reading p {
    margin-bottom: 1.5em;
}

.post-reading a {
    color: #6cb4ee;
    text-decoration: underline;
    text-decoration-color: rgba(108, 180, 238, 0.3);
    text-underline-offset: 3px;
    transition: text-decoration-color 0.2s;
}

.post-reading a:hover {
    text-decoration-color: rgba(108, 180, 238, 0.8);
}

.post-reading strong {
    color: #ffffff;
    font-weight: 600;
}

.post-reading em {
    font-style: italic;
    color: #c8c4bf;
}

/* --- Lists --- */
.post-reading ul,
.post-reading ol {
    padding-left: 1.5em;
    margin-bottom: 1.5em;
}

.post-reading li {
    margin-bottom: 0.5em;
}

.post-reading li::marker {
    color: #6cb4ee;
}

/* --- Blockquotes / Pull quotes --- */
.post-reading blockquote {
    border-left: 3px solid #6cb4ee;
    background: rgba(108, 180, 238, 0.05);
    padding: 1.25em 1.5em;
    margin: 2em 0;
    border-radius: 0 8px 8px 0;
    font-style: italic;
    color: #b8b4af;
}

.post-reading blockquote p {
    margin-bottom: 0.5em;
}

.post-reading blockquote p:last-child {
    margin-bottom: 0;
}

/* Pull quote: use > **text** in markdown for emphasis */
.post-reading blockquote strong {
    font-style: normal;
    font-size: 1.15em;
    color: #e8e6e3;
    display: block;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.4;
}

/* --- Callout blocks --- */
/* Use in markdown: <div class="callout"> ... </div> */
.post-reading .callout {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 12px;
    padding: 1.5em 1.75em;
    margin: 2em 0;
}

.post-reading .callout-info {
    border-left: 4px solid #6cb4ee;
    background: rgba(108, 180, 238, 0.04);
}

.post-reading .callout-warning {
    border-left: 4px solid #f0a030;
    background: rgba(240, 160, 48, 0.04);
}

.post-reading .callout-success {
    border-left: 4px solid #4caf7d;
    background: rgba(76, 175, 125, 0.04);
}

/* --- Figures & images --- */
.post-reading img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    margin: 2em 0;
    display: block;
}

.post-reading figure {
    margin: 2.5em -2rem;
    padding: 0;
}

.post-reading figure img {
    width: calc(100% + 4rem);
    max-width: calc(100% + 4rem);
    margin: 0;
    border-radius: 8px;
}

.post-reading figcaption {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    font-size: 0.85rem;
    color: #888;
    margin-top: 0.75em;
    text-align: center;
    padding: 0 2rem;
}

/* --- Code --- */
.post-reading code {
    font-family: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;
    font-size: 0.85em;
    background: rgba(255, 255, 255, 0.06);
    padding: 0.2em 0.4em;
    border-radius: 4px;
    color: #e0ddd8;
}

.post-reading pre {
    margin: 2em -1rem;
    padding: 1.25em 1.5em;
    border-radius: 8px;
    overflow-x: auto;
    font-size: 0.875rem;
    line-height: 1.6;
    background: #111 !important;
    border: 1px solid rgba(255,255,255,0.06);
}

.post-reading pre code {
    background: none;
    padding: 0;
    font-size: inherit;
}

/* --- Tables --- */
.post-reading table {
    width: 100%;
    border-collapse: collapse;
    margin: 2em 0;
    font-size: 0.95rem;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

.post-reading th,
.post-reading td {
    padding: 0.75em 1em;
    border-bottom: 1px solid rgba(255,255,255,0.08);
    text-align: left;
}

.post-reading th {
    font-weight: 600;
    color: #fff;
    background: rgba(255,255,255,0.04);
    font-size: 0.85em;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.post-reading tr:hover td {
    background: rgba(255,255,255,0.02);
}

/* --- Horizontal rules as section breaks --- */
.post-reading hr {
    border: none;
    height: 1px;
    background: linear-gradient(to right, transparent, rgba(255,255,255,0.12), transparent);
    margin: 3em 0;
}

/* --- Footnotes --- */
.post-reading .footnote {
    font-size: 0.85rem;
    color: #888;
    border-top: 1px solid rgba(255,255,255,0.08);
    margin-top: 3em;
    padding-top: 1.5em;
}

.post-reading .footnote ol {
    padding-left: 1.5em;
}

.post-reading .footnote li {
    margin-bottom: 0.75em;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

.post-reading sup a {
    color: #6cb4ee;
    text-decoration: none;
    font-weight: 600;
}

/* --- Post header --- */
.post-hero {
    max-width: 680px;
    margin: 0 auto 0.95rem;
    padding: 1.1rem 1.15rem 1.2rem;
    border-radius: 3px;
    border: 1px solid rgba(255, 255, 255, 0.09);
    background: rgba(8, 13, 22, 0.9);
}

.post-hero h1 {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    font-size: clamp(1.45rem, 3.5vw, 2rem);
    font-weight: 760;
    letter-spacing: -0.015em;
    line-height: 1.24;
    color: #f2f7ff;
    margin: 0;
}

.post-meta-bar {
    display: flex;
    align-items: center;
    gap: 0.65em;
    margin-top: 0.58rem;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    font-size: 0.8rem;
    color: #89bde2;
    letter-spacing: 0.045em;
    text-transform: uppercase;
    font-weight: 600;
}

.post-meta-bar time {
    color: #89bde2;
}

.post-meta-bar .reading-time {
    color: #89bde2;
}

.post-meta-bar .separator {
    color: rgba(137, 189, 226, 0.85);
}

/* --- Scroll progress bar --- */
.scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    height: 3px;
    background: linear-gradient(to right, #6cb4ee, #a78bfa);
    width: 0%;
    z-index: 9999;
    transition: width 0.1s linear;
}

/* --- Table of contents --- */
.post-toc {
    max-width: 680px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

.post-toc details {
    background: rgba(255,255,255,0.02);
    border: 1px solid rgba(255,255,255,0.06);
    border-radius: 8px;
    padding: 1em 1.25em;
    margin-bottom: 0.75em;
}

.post-toc + .post-reading {
    padding-top: 0.75rem;
}

.post-toc summary {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    font-size: 0.85rem;
    font-weight: 600;
    color: #999;
    cursor: pointer;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    list-style: none;
    display: flex;
    align-items: center;
    gap: 0.5em;
}

.post-toc summary::-webkit-details-marker {
    display: none;
}

.post-toc summary::before {
    content: '▸';
    transition: transform 0.2s;
}

.post-toc details[open] summary::before {
    transform: rotate(90deg);
}

.post-toc ol {
    list-style: none;
    padding: 0;
    margin: 1em 0 0;
}

.post-toc li {
    margin-bottom: 0.5em;
}

.post-toc a {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    font-size: 0.9rem;
    color: #aaa;
    text-decoration: none;
    transition: color 0.2s;
}

.post-toc a:hover {
    color: #6cb4ee;
}

.post-toc .toc-h3 {
    padding-left: 1.25em;
}

/* --- Tags at bottom --- */
.post-tags-footer {
    max-width: 680px;
    margin: 0 auto;
    padding: 2rem 1.5rem 3rem;
    border-top: 1px solid rgba(255,255,255,0.06);
}

.post-tags-footer .post-tag {
    background: rgba(255,255,255,0.05);
    border: 1px solid rgba(255,255,255,0.08);
    color: #aaa;
    padding: 0.4em 0.8em;
    border-radius: 6px;
    font-size: 0.8rem;
    margin-right: 0.5em;
    margin-bottom: 0.5em;
    display: inline-block;
    transition: all 0.2s;
    text-decoration: none;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

.post-tags-footer .post-tag:hover {
    background: rgba(108, 180, 238, 0.1);
    border-color: rgba(108, 180, 238, 0.3);
    color: #6cb4ee;
}

/* --- Responsive --- */
@media (max-width: 720px) {
    .post-hero h1 {
        font-size: clamp(1.25rem, 7vw, 1.6rem);
    }
    
    .post-reading {
        font-size: 1.05rem;
        padding: 1.5rem 1rem 3rem;
    }
    
    .post-reading figure {
        margin-left: -1rem;
        margin-right: -1rem;
    }
    
    .post-reading figure img {
        width: calc(100% + 2rem);
        max-width: calc(100% + 2rem);
        border-radius: 0;
    }
    
    .post-reading pre {
        margin-left: -1rem;
        margin-right: -1rem;
        border-radius: 0;
    }
    
    .post-hero,
    .post-toc,
    .post-tags-footer {
        padding-left: 1rem;
        padding-right: 1rem;
    }

    .post-hero {
        margin-bottom: 0.8rem;
        padding-top: 0.95rem;
        padding-bottom: 1rem;
    }
}

/* --- Smooth anchor scrolling --- */
html {
    scroll-behavior: smooth;
}

/* --- Transition for interactive elements --- */
.post-reading h2,
.post-reading h3 {
    scroll-margin-top: 2rem;
}