/* ═══════════════════════════════════════════════════════════════════════════
   POST — single article reading experience

   Best-in-class reading:
   - Fluid typography (Smashing Magazine style calc() + vw)
   - ~65 char line length (38rem content width)
   - Generous line height that scales with font size
   - Clear heading hierarchy with rhythm
   - Drop cap on first paragraph
   - Sticky TOC on wide screens
   - Reading progress bar
   ═══════════════════════════════════════════════════════════════════════════ */

/* ── Reading progress bar ──────────────────────────────────────────────── */

.post__progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  z-index: calc(var(--z-sticky) + 1);
  background: transparent;
}

.post__progress-bar {
  height: 100%;
  width: 0%;
  background: var(--color-accent);
  transition: width 80ms linear;
}

/* ── Header ────────────────────────────────────────────────────────────── */

.post__header {
  text-align: center;
  padding-top: var(--space-8);
  padding-bottom: var(--space-10);
}

.post__tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: var(--tracking-wide);
  text-transform: lowercase;
  color: var(--color-accent);
  background: var(--color-accent-glow);
  padding: var(--space-1) var(--space-4);
  border-radius: var(--radius-full);
  text-decoration: none;
  margin-bottom: var(--space-6);
  transition: background var(--duration-fast) var(--ease-smooth);
}

.post__tag:hover {
  background: var(--color-accent);
  color: var(--color-bg);
}

/* Category-specific tag colors */
.post__tag[data-category="malware-analysis"] { color: var(--color-cat-malware); background: rgba(231,76,60,0.12); }
.post__tag[data-category="tool-dev"] { color: var(--color-cat-tooldev); background: rgba(52,152,219,0.12); }
.post__tag[data-category="industry-thoughts"] { color: var(--color-cat-industry); background: rgba(243,156,18,0.12); }
.post__tag[data-category="philosophy"] { color: var(--color-cat-philosophy); background: rgba(155,89,182,0.12); }

.post__title {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 1.4rem + 1.5vw, 2.75rem);
  font-weight: 700;
  line-height: var(--leading-tight);
  letter-spacing: var(--tracking-tight);
  margin-bottom: var(--space-6);
  max-width: 42rem;
  margin-left: auto;
  margin-right: auto;
}

.post__excerpt {
  font-size: var(--text-lg);
  line-height: var(--leading-relaxed);
  color: var(--color-fg-muted);
  max-width: 36rem;
  margin: 0 auto var(--space-6);
}

.post__meta {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-fg-faint);
  letter-spacing: var(--tracking-wide);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  flex-wrap: wrap;
}

.post__meta-sep { opacity: 0.5; }

.post__source {
  color: var(--color-fg-faint);
  font-style: italic;
}

/* ── Feature image ─────────────────────────────────────────────────────── */

.post__feature-image {
  margin-bottom: var(--space-12);
}

.post__feature-image figure { margin: 0; }

.post__feature-image img {
  width: 100%;
  border-radius: var(--radius-lg);
}

/* ── Body layout (content + TOC sidebar) ───────────────────────────────── */

.post__body-wrap {
  position: relative;
}

.post__layout {
  position: relative;
  max-width: 38rem;
  margin: 0 auto;
}

/* ── Table of contents — Notion-style sticky sidebar ───────────────────── */

.post__toc {
  display: none;
}

@media (min-width: 72rem) {
  .post__layout {
    position: relative;
  }

  .post__toc {
    display: block;
    position: absolute;
    left: 100%;
    top: 0;
    bottom: 0;
    margin-left: var(--space-8);
    width: 14rem;
  }

  .post__toc-inner {
    position: fixed;
    top: calc(var(--nav-height) + var(--space-8));
    width: 14rem;
    padding: var(--space-4);
    background: var(--color-bg-raised);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
  }

  .post__toc-inner.visible {
    opacity: 1;
    pointer-events: auto;
  }
}

.post__toc-title {
  font-family: var(--font-sans);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: var(--color-fg-faint);
  margin-bottom: var(--space-3);
}

.post__toc-nav {
  display: flex;
  flex-direction: column;
  gap: 1px;
  max-height: 11.25rem;
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--color-border) transparent;
}

.post__toc-nav a {
  display: block;
  font-family: var(--font-sans);
  font-size: var(--text-xs);
  line-height: var(--leading-normal);
  color: var(--color-fg-faint);
  text-decoration: none;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-sm);
  border-left: 2px solid transparent;
  transition: all var(--duration-fast) var(--ease-smooth);
}

.post__toc-nav a:hover {
  color: var(--color-fg);
  background: var(--color-bg-inset);
}

.post__toc-nav a.active {
  color: var(--color-fg);
  border-left-color: var(--color-accent);
  background: var(--color-bg-inset);
}

/* Notion-style indentation by heading level */
.post__toc-nav a[data-level="2"] {
  padding-left: var(--space-3);
}

.post__toc-nav a[data-level="3"] {
  padding-left: var(--space-6);
  font-size: calc(var(--text-xs) - 0.0625rem);
}

.post__toc-nav a[data-level="4"] {
  padding-left: var(--space-10);
  font-size: calc(var(--text-xs) - 0.125rem);
}


/* ═══════════════════════════════════════════════════════════════════════════
   GHOST CONTENT — the actual reading experience

   Fluid typography: font sizes scale smoothly between mobile and desktop.
   Line height uses calc() to stay proportional (Smashing Magazine technique).
   Content width capped at 38rem (~65 chars at 18px body text).
   ═══════════════════════════════════════════════════════════════════════════ */

.post__content.gh-content {
  font-family: var(--font-display);
  font-size: calc(1.0625rem + 0.15vw);     /* ~17-19px fluid */
  line-height: calc(1.55em + 0.12vw);       /* fluid, generous */
  letter-spacing: var(--tracking-normal);
  color: var(--color-fg);
  word-break: break-word;
  overflow-wrap: break-word;
}

/* Paragraph spacing */
.post__content.gh-content > * {
  margin-bottom: 1.5em;
}

.post__content.gh-content > *:last-child {
  margin-bottom: 0;
}

/* ── Drop cap — first paragraph first letter ───────────────────────────── */

.post__content.gh-content > p:first-of-type::first-letter {
  font-family: var(--font-display);
  font-size: 3.4em;
  font-weight: 700;
  float: left;
  line-height: 0.8;
  margin-right: 0.08em;
  margin-top: 0.05em;
  color: var(--color-accent);
}

/* ── Headings — clear hierarchy with rhythm ────────────────────────────── */

.post__content.gh-content h2 {
  font-family: var(--font-display);
  font-size: clamp(1.375rem, 1.2rem + 0.6vw, 1.75rem);
  font-weight: 700;
  line-height: var(--leading-snug);
  letter-spacing: var(--tracking-tight);
  margin-top: 3em;
  margin-bottom: 0.8em;
  color: var(--color-fg);
}

.post__content.gh-content h3 {
  font-family: var(--font-display);
  font-size: clamp(1.125rem, 1rem + 0.4vw, 1.375rem);
  font-weight: 700;
  line-height: var(--leading-snug);
  margin-top: 2.2em;
  margin-bottom: 0.6em;
  color: var(--color-fg);
}

.post__content.gh-content h4 {
  font-family: var(--font-sans);
  font-size: calc(1rem + 0.1vw);
  font-weight: 600;
  line-height: var(--leading-normal);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  margin-top: 2em;
  margin-bottom: 0.5em;
  color: var(--color-fg-muted);
}

/* Remove double spacing when heading follows heading */
.post__content.gh-content h2 + h3,
.post__content.gh-content h3 + h4 {
  margin-top: 1em;
}

/* ── Links ──────────────────────────────────────────────────────────────── */

.post__content.gh-content a {
  color: var(--color-accent);
  text-decoration: underline;
  text-decoration-color: rgba(231, 76, 60, 0.3);
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
  transition: text-decoration-color var(--duration-fast) var(--ease-smooth);
}

.post__content.gh-content a:hover {
  text-decoration-color: var(--color-accent);
}

/* ── Blockquotes — premium serif treatment ─────────────────────────────── */

.post__content.gh-content blockquote {
  border-left: 3px solid var(--color-accent);
  padding-left: 1.5em;
  margin: 2em 0;
  font-style: italic;
  font-size: calc(1.0625rem + 0.12vw);
  line-height: calc(1.6em + 0.1vw);
  color: var(--color-fg-muted);
}

.post__content.gh-content blockquote p {
  margin-bottom: 0.5em;
}

.post__content.gh-content blockquote p:last-child {
  margin-bottom: 0;
}

/* ── Code blocks — Dracula themed, with polish ─────────────────────────── */

.post__content.gh-content pre {
  background: var(--color-bg-inset);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-6) var(--space-6);
  margin: 2em 0;
  overflow-x: auto;
  font-size: calc(0.8125rem + 0.05vw);
  line-height: 1.6;
  max-height: 36rem;
  position: relative;
}

.post__content.gh-content pre code {
  background: none;
  border: none;
  padding: 0;
  font-family: var(--font-mono);
  color: #f8f8f2;
}

/* Inline code */
.post__content.gh-content :not(pre) > code {
  font-family: var(--font-mono);
  font-size: 0.88em;
  background: var(--color-bg-inset);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 0.15em 0.4em;
  word-break: break-word;
}

/* ── Images ────────────────────────────────────────────────────────────── */

.post__content.gh-content img {
  border-radius: var(--radius-md);
  transition: transform var(--duration-slow) var(--ease-smooth);
}

.post__content.gh-content figure {
  margin: 2em 0;
}

.post__content.gh-content figcaption {
  font-family: var(--font-sans);
  font-size: var(--text-xs);
  color: var(--color-fg-faint);
  text-align: center;
  margin-top: var(--space-3);
  font-style: italic;
}

/* ── Lists ──────────────────────────────────────────────────────────────── */

.post__content.gh-content ul,
.post__content.gh-content ol {
  padding-left: 1.5em;
  margin-bottom: 1.5em;
}

.post__content.gh-content li {
  margin-bottom: 0.5em;
  line-height: calc(1.5em + 0.1vw);
}

.post__content.gh-content li::marker {
  color: var(--color-accent);
}

/* ── Horizontal rules ──────────────────────────────────────────────────── */

.post__content.gh-content hr {
  border: none;
  height: 1px;
  background: var(--color-border);
  margin: 3em 0;
}

/* ── Tables ────────────────────────────────────────────────────────────── */

.post__content.gh-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 2em 0;
  font-family: var(--font-sans);
  font-size: var(--text-sm);
}

.post__content.gh-content th {
  font-weight: 600;
  text-align: left;
  padding: var(--space-3) var(--space-4);
  border-bottom: 2px solid var(--color-border);
  color: var(--color-fg);
  font-size: var(--text-xs);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
}

.post__content.gh-content td {
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--color-border);
}

/* ═══════════════════════════════════════════════════════════════════════════
   POST META SECTIONS — tags, share, author, related, comments
   ═══════════════════════════════════════════════════════════════════════════ */

/* ── Tags ──────────────────────────────────────────────────────────────── */

.post__tags-section {
  padding: var(--space-8) 0;
}

.post__tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.post__tag-link {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: var(--tracking-wide);
  color: var(--color-fg-faint);
  padding: var(--space-1) var(--space-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-smooth),
              border-color var(--duration-fast) var(--ease-smooth);
}

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

/* ── Share ──────────────────────────────────────────────────────────────── */

.post__share {
  padding: var(--space-6) 0;
}

.post__share-inner {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.post__share-label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: var(--color-fg-faint);
}

.post__share-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.25rem;
  height: 2.25rem;
  color: var(--color-fg-faint);
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  cursor: pointer;
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-smooth),
              border-color var(--duration-fast) var(--ease-smooth),
              background var(--duration-fast) var(--ease-smooth);
}

.post__share-btn:hover {
  color: var(--color-fg);
  border-color: var(--color-border-bold);
  background: var(--color-bg-raised);
}

/* ── Author card ───────────────────────────────────────────────────────── */

.post__author-section {
  padding: var(--space-10) 0;
}

.post__author {
  display: flex;
  align-items: center;
  gap: var(--space-5);
}

.post__author-avatar {
  width: 3.5rem;
  height: 3.5rem;
  border-radius: var(--radius-full);
  object-fit: cover;
  border: 2px solid var(--color-border);
}

.post__author-name {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  font-weight: 600;
  margin-bottom: var(--space-1);
}

.post__author-bio {
  font-size: var(--text-sm);
  color: var(--color-fg-muted);
  line-height: var(--leading-relaxed);
  margin-bottom: 0;
}

/* ── Related posts ─────────────────────────────────────────────────────── */

.post__related {
  border-top: 1px solid var(--color-border);
}

.post__related-title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  letter-spacing: var(--tracking-tight);
  margin-bottom: var(--space-8);
}

.post__related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-8);
}

/* ── Comments ──────────────────────────────────────────────────────────── */

.post__comments {
  padding: var(--space-12) 0;
  border-top: 1px solid var(--color-border);
}

/* ── Responsive ────────────────────────────────────────────────────────── */

@media (max-width: 64rem) {
  .post__related-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 36rem) {
  .post__related-grid {
    grid-template-columns: 1fr;
  }

  .post__title {
    font-size: clamp(1.5rem, 1.2rem + 1.2vw, 2rem);
  }

  .post__content.gh-content > p:first-of-type::first-letter {
    font-size: 2.8em;
  }
}