/* Letsreach blog — extends site.css tokens. Blog-only rules only. */

.blog-header {
  max-width: 780px;
  margin: 0 auto var(--lr-section-y, 80px);
  text-align: center;
}
.blog-header .lr-eyebrow {
  display: inline-block;
  margin-bottom: 16px;
}
/* Blog index h1: smaller than homepage hero since content below is what matters */
.blog-header h1,
.blog-header .lr-h1 {
  font-size: clamp(32px, 4vw, 56px);
  line-height: 1.05;
  letter-spacing: -0.02em;
  margin: 12px 0 24px;
}

/* Post grid on /blog index */
.post-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 32px;
  max-width: 1200px;
  margin: 0 auto;
}

@media (max-width: 720px) {
  .post-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  .blog-header {
    margin-bottom: 48px;
  }
}

/* Blog filter bar: search + chip rows */
.blog-filters {
  display: flex;
  flex-direction: column;
  gap: 16px;
  max-width: 1200px;
  margin: 0 auto 40px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--lr-line, #1E2230);
}
.blog-filter-search {
  position: relative;
  max-width: 420px;
}
.blog-search-icon {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--lr-fg-3, rgba(255,255,255,0.62));
  pointer-events: none;
}
.blog-filter-search input {
  width: 100%;
  padding: 12px 14px 12px 38px;
  background: var(--lr-black-2, #0B0C10);
  border: 1px solid var(--lr-line, #1E2230);
  border-radius: var(--lr-r-md, 10px);
  color: var(--lr-fg-1, #fff);
  font-family: var(--lr-font-text, 'Inter', sans-serif);
  font-size: 14px;
  transition: border-color 150ms ease;
  -webkit-appearance: none;
}
.blog-filter-search input::placeholder { color: var(--lr-fg-3, rgba(255,255,255,0.62)); }
.blog-filter-search input:focus {
  outline: none;
  border-color: var(--lr-blue-soft, #5B7CFF);
}
.blog-filter-group {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}
.blog-filter-label {
  font-family: var(--lr-font-mono, monospace);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--lr-fg-3, rgba(255,255,255,0.62));
  margin-right: 4px;
}
.filter-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  background: transparent;
  border: 1px solid var(--lr-line, #1E2230);
  border-radius: var(--lr-r-pill, 999px);
  color: var(--lr-fg-2, rgba(255,255,255,0.82));
  font-family: var(--lr-font-text, 'Inter', sans-serif);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: background 150ms ease, border-color 150ms ease, color 150ms ease;
  touch-action: manipulation;
}
.filter-chip:hover {
  border-color: var(--lr-blue-soft, #5B7CFF);
  color: var(--lr-fg-1, #fff);
}
.filter-chip.active {
  background: var(--lr-blue, #1B4BFF);
  border-color: var(--lr-blue, #1B4BFF);
  color: #fff;
}
.filter-count {
  font-family: var(--lr-font-mono, monospace);
  font-size: 10px;
  font-weight: 500;
  opacity: 0.7;
  padding-left: 4px;
  border-left: 1px solid currentColor;
  line-height: 1;
}

.blog-empty-state {
  max-width: 1200px;
  margin: 40px auto;
  padding: 32px;
  border: 1px dashed var(--lr-line, #1E2230);
  border-radius: var(--lr-r-md, 10px);
  text-align: center;
  color: var(--lr-fg-2, rgba(255,255,255,0.82));
  font-size: 15px;
}
.blog-link-btn {
  background: none;
  border: 0;
  padding: 0;
  color: var(--lr-blue-soft, #5B7CFF);
  font: inherit;
  cursor: pointer;
  text-decoration: underline;
  text-underline-offset: 2px;
}
.blog-link-btn:hover { color: var(--lr-fg-1, #fff); }

.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.post-card {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--lr-line, #1E2230);
  border-radius: var(--lr-r-lg, 16px);
  overflow: hidden;
  background: var(--lr-black-2, #0B0C10);
  transition: transform var(--lr-dur, 240ms) var(--lr-ease, ease-out), border-color var(--lr-dur, 240ms) var(--lr-ease, ease-out);
}
/* .post-card sets display:flex which ties on specificity with the UA [hidden] rule, so we
   declare this ourselves to keep filter-based hiding working. */
.post-card[hidden] { display: none; }
.post-card:hover {
  transform: translateY(-2px);
  border-color: var(--lr-blue-soft, #5B7CFF);
}

.post-card-media {
  display: block;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: var(--lr-black-3, #14161C);
}
.post-card-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.post-card-body {
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  flex: 1;
}

.post-category {
  font-family: var(--lr-font-mono, 'JetBrains Mono', monospace);
  font-size: var(--lr-mono-sm, 11px);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--lr-fg-3, rgba(255,255,255,0.62));
  display: inline-block;
}

.post-card-title {
  font-family: var(--lr-font-display, 'Unbounded', sans-serif);
  font-size: var(--lr-display-sm, 22px);
  line-height: var(--lr-lh-heading, 1.05);
  margin: 0;
  color: var(--lr-fg-1, #fff);
}
.post-card-title a {
  color: inherit;
  text-decoration: none;
}
.post-card-title a:hover {
  text-decoration: underline;
}

.post-card-excerpt {
  font-size: var(--lr-body, 16px);
  line-height: var(--lr-lh-body, 1.6);
  color: var(--lr-fg-2, rgba(255,255,255,0.82));
  margin: 0;
}

.post-card-meta {
  display: flex;
  gap: 16px;
  font-family: var(--lr-font-mono, 'JetBrains Mono', monospace);
  font-size: var(--lr-mono-sm, 11px);
  color: var(--lr-fg-3, rgba(255,255,255,0.62));
  margin-top: auto;
  padding-top: 8px;
}

/* Individual post page. .wrap supplies the horizontal gutter; we add vertical section padding
   via padding-block so the gutter isn't overridden. */
.blog-post {
  max-width: 760px;
  margin: 0 auto;
  padding-block: var(--lr-section-y, 80px);
}
@media (max-width: 720px) {
  .blog-post {
    padding-block: 48px;
  }
  .blog-post-header {
    margin-bottom: 32px;
  }
  .blog-post-cover {
    margin-bottom: 32px;
    border-radius: var(--lr-r-md, 12px);
  }
}

.blog-breadcrumb {
  font-family: var(--lr-font-mono, 'JetBrains Mono', monospace);
  font-size: var(--lr-mono-sm, 11px);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 16px;
}
.blog-breadcrumb a {
  color: var(--lr-fg-3, rgba(255,255,255,0.62));
  text-decoration: none;
}
.blog-breadcrumb a:hover {
  color: var(--lr-fg-1, #fff);
}

.blog-post-header {
  margin-bottom: 48px;
  max-width: 720px;
}
/* Post title: big enough to anchor the page, small enough to not dominate */
.blog-post-header .lr-h1,
.blog-post-header h1 {
  font-size: clamp(28px, 3.5vw, 48px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin: 16px 0 20px;
}
.blog-post-header .lr-lead {
  max-width: 640px;
  font-size: clamp(17px, 1.4vw, 20px);
  color: var(--lr-fg-2, rgba(255,255,255,0.82));
}

.blog-post-meta {
  display: flex;
  gap: 20px;
  font-family: var(--lr-font-mono, 'JetBrains Mono', monospace);
  font-size: var(--lr-mono-sm, 11px);
  color: var(--lr-fg-3, rgba(255,255,255,0.62));
  margin-top: 24px;
}

.blog-post-cover {
  width: 100%;
  height: auto;
  border-radius: var(--lr-r-lg, 16px);
  margin: 0 0 48px;
  display: block;
}

/* Rendered markdown body */
.blog-post-body {
  font-size: var(--lr-lead, 19px);
  line-height: var(--lr-lh-body, 1.6);
  color: var(--lr-fg-1, #fff);
}
.blog-post-body > * + * {
  margin-top: 1.5em;
}
.blog-post-body h2 {
  font-family: var(--lr-font-display, 'Unbounded', sans-serif);
  font-size: var(--lr-display-md, 32px);
  line-height: var(--lr-lh-heading, 1.05);
  margin-top: 2.4em;
  margin-bottom: 0.6em;
  font-weight: 600;
}
.blog-post-body h3 {
  font-family: var(--lr-font-display, 'Unbounded', sans-serif);
  font-size: 1.5rem;
  line-height: 1.2;
  margin-top: 2em;
  margin-bottom: 0.5em;
  font-weight: 600;
}
.blog-post-body p {
  margin: 0 0 1.25em;
}
.blog-post-body a {
  color: var(--lr-blue-soft, #5B7CFF);
  text-decoration: underline;
  text-underline-offset: 2px;
}
.blog-post-body a:hover {
  color: var(--lr-white, #fff);
}
.blog-post-body ul,
.blog-post-body ol {
  padding-left: 1.5em;
  margin: 0 0 1.25em;
}
.blog-post-body li {
  margin-bottom: 0.4em;
}
.blog-post-body blockquote {
  border-left: 3px solid var(--lr-blue, #1B4BFF);
  padding: 4px 0 4px 24px;
  margin: 2em 0;
  color: var(--lr-fg-2, rgba(255,255,255,0.82));
  font-style: italic;
}
.blog-post-body code {
  font-family: var(--lr-font-mono, 'JetBrains Mono', monospace);
  font-size: 0.9em;
  background: var(--lr-black-3, #14161C);
  padding: 0.15em 0.4em;
  border-radius: var(--lr-r-sm, 4px);
}
.blog-post-body pre {
  background: var(--lr-black-3, #14161C);
  padding: 20px 24px;
  border-radius: var(--lr-r-md, 10px);
  overflow-x: auto;
  font-family: var(--lr-font-mono, 'JetBrains Mono', monospace);
  font-size: 14px;
  line-height: 1.55;
  margin: 2em 0;
}
.blog-post-body pre code {
  background: transparent;
  padding: 0;
  font-size: inherit;
}
.blog-post-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 2em 0;
  font-size: 15px;
  display: block;
  overflow-x: auto;
  max-width: 100%;
}
.blog-post-body th,
.blog-post-body td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--lr-line, #1E2230);
  text-align: left;
  vertical-align: top;
}
.blog-post-body th {
  font-family: var(--lr-font-mono, 'JetBrains Mono', monospace);
  font-size: var(--lr-mono-sm, 11px);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--lr-fg-3, rgba(255,255,255,0.62));
  font-weight: 600;
}
.blog-post-body img {
  max-width: 100%;
  height: auto;
  border-radius: var(--lr-r-md, 10px);
  margin: 2em 0;
  display: block;
}

/* YouTube-style clickable thumbnail */
.blog-post-body .yt-embed {
  position: relative;
  display: block;
  margin: 2em 0;
  border-radius: var(--lr-r-md, 10px);
  overflow: hidden;
  text-decoration: none;
  color: inherit;
  aspect-ratio: 16 / 9;
  background: var(--lr-black-3, #14161C);
  transition: transform var(--lr-dur, 240ms) var(--lr-ease, ease-out);
}
.blog-post-body .yt-embed:hover {
  transform: translateY(-2px);
}
.blog-post-body .yt-embed img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  margin: 0;
  border-radius: 0;
  display: block;
  transition: filter var(--lr-dur, 240ms) var(--lr-ease, ease-out);
}
.blog-post-body .yt-embed:hover img {
  filter: brightness(0.85);
}
/* YouTube red play button triangle */
.blog-post-body .yt-embed .yt-play {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: clamp(64px, 10%, 96px);
  aspect-ratio: 72 / 51;
  background: rgba(0,0,0,0.82);
  border-radius: 16px;
  pointer-events: none;
  transition: background var(--lr-dur, 240ms) var(--lr-ease, ease-out), transform var(--lr-dur, 240ms) var(--lr-ease, ease-out);
}
.blog-post-body .yt-embed .yt-play::after {
  content: '';
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-40%, -50%);
  width: 0; height: 0;
  border-style: solid;
  border-width: 14px 0 14px 22px;
  border-color: transparent transparent transparent #fff;
}
.blog-post-body .yt-embed:hover .yt-play {
  background: #FF0000;
  transform: translate(-50%, -50%) scale(1.06);
}
/* Caption strip at bottom */
.blog-post-body .yt-embed .yt-caption {
  position: absolute;
  left: 0; right: 0; bottom: 0;
  padding: 12px 16px;
  font-family: var(--lr-font-mono, 'JetBrains Mono', monospace);
  font-size: var(--lr-mono-sm, 11px);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #fff;
  background: linear-gradient(to top, rgba(0,0,0,0.9), rgba(0,0,0,0));
  pointer-events: none;
}
.blog-post-body .yt-embed:focus-visible {
  outline: 2px solid var(--lr-blue-soft, #5B7CFF);
  outline-offset: 3px;
}
.blog-post-body hr {
  border: 0;
  border-top: 1px solid var(--lr-line, #1E2230);
  margin: 3em 0;
}

.blog-post-footer {
  margin-top: 64px;
  padding-top: 32px;
  border-top: 1px solid var(--lr-line, #1E2230);
}

@media (max-width: 640px) {
  .post-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  .blog-post {
    padding-block: 48px;
  }
  .blog-post-body {
    font-size: var(--lr-body, 16px);
  }
  .blog-post-body h2 {
    font-size: 28px;
  }
}

/* ============================================================
   Post UX additions: progress bar, TOC, anchor links, reading time,
   author card, related posts. All opt-in and scoped to .blog-post.
   ============================================================ */

/* Reading progress bar (fixed, thin, top of viewport) */
.read-progress {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: transparent;
  z-index: 100;
  pointer-events: none;
}
.read-progress-bar {
  height: 100%;
  width: 0;
  background: var(--lr-blue, #1B4BFF);
  box-shadow: 0 0 12px rgba(27,75,255,0.5);
  transition: width 50ms linear;
}

/* Reading time pill in the post meta row */
.reading-time {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}
.reading-time svg { flex-shrink: 0; }

/* Post layout: body is the default column; TOC sits above on narrow
   screens and floats to the left margin on wide screens. */
.blog-post-layout { position: relative; }

/* Table of contents */
.blog-toc {
  margin: 0 0 32px;
  border: 1px solid var(--lr-line, #1E2230);
  border-radius: var(--lr-r-md, 10px);
  background: var(--lr-black-2, #0B0C10);
  overflow: hidden;
}
.blog-toc-title { display: none; }
.blog-toc-toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 14px 18px;
  background: transparent;
  border: 0;
  color: var(--lr-fg-1, #fff);
  font-family: var(--lr-font-text, 'Inter', sans-serif);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  text-align: left;
}
.blog-toc-toggle svg { transition: transform 200ms ease; color: var(--lr-fg-3, rgba(255,255,255,0.62)); }
.blog-toc-toggle[aria-expanded="true"] svg { transform: rotate(180deg); }
.blog-toc-list {
  list-style: none;
  padding: 0;
  margin: 0;
  max-height: 0;
  overflow: hidden;
  transition: max-height 220ms ease, padding 220ms ease;
}
.blog-toc-list.open {
  max-height: 1000px;
  padding: 4px 18px 14px;
}
.blog-toc-list li { padding: 6px 0; }
.blog-toc-list a {
  color: var(--lr-fg-2, rgba(255,255,255,0.82));
  text-decoration: none;
  font-size: 14px;
  line-height: 1.5;
  transition: color 150ms ease;
}
.blog-toc-list a:hover { color: var(--lr-blue-soft, #5B7CFF); }

/* Desktop: pin TOC to the left margin of the 760px content column. */
@media (min-width: 1100px) {
  .blog-toc {
    position: sticky;
    top: 100px;
    float: left;
    width: 220px;
    margin-left: -260px;
    margin-bottom: 0;
    border: 0;
    background: transparent;
    padding: 0;
  }
  .blog-toc-toggle { display: none; }
  .blog-toc-title {
    display: block;
    font-family: var(--lr-font-mono, 'JetBrains Mono', monospace);
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--lr-fg-3, rgba(255,255,255,0.62));
    margin-bottom: 12px;
  }
  .blog-toc-list {
    max-height: none;
    padding: 0;
    border-left: 1px solid var(--lr-line, #1E2230);
    padding-left: 14px;
  }
  .blog-toc-list li { padding: 4px 0; }
  .blog-toc-list a { font-size: 13px; }
}

/* H2s get an id for TOC scroll-spy and deep-link targets. No visible anchor button. */
.blog-post-body h2 { scroll-margin-top: 80px; }

/* TOC active state on desktop (sticky sidebar) */
.blog-toc-list a.active {
  color: var(--lr-fg-1, #fff);
  font-weight: 600;
}
@media (min-width: 1100px) {
  .blog-toc-list {
    position: relative;
  }
  .blog-toc-list a {
    display: block;
    padding: 4px 0 4px 14px;
    margin-left: -14px;
    border-left: 2px solid transparent;
    transition: color 150ms ease, border-color 150ms ease;
  }
  .blog-toc-list a.active {
    border-left-color: var(--lr-blue, #1B4BFF);
    color: var(--lr-fg-1, #fff);
  }
  /* When we paint the active border, hide the default list border to avoid a double line. */
  .blog-toc-list { border-left: 1px solid var(--lr-line, #1E2230); padding-left: 0; }
}

/* Author card */
.author-card {
  display: flex;
  gap: 24px;
  align-items: flex-start;
  padding: 32px;
  margin-top: 80px;
  border: 1px solid var(--lr-line, #1E2230);
  border-radius: var(--lr-r-lg, 16px);
  background: linear-gradient(180deg, var(--lr-black-2, #0B0C10) 0%, rgba(27,75,255,0.04) 100%);
}
.author-card-photo-link { flex-shrink: 0; display: block; }
.author-card-photo {
  width: 88px;
  height: 88px;
  border-radius: 50%;
  object-fit: cover;
  border: 1px solid var(--lr-line, #1E2230);
  display: block;
  transition: border-color 200ms ease, transform 200ms ease;
}
.author-card-photo-link:hover .author-card-photo {
  border-color: var(--lr-blue-soft, #5B7CFF);
  transform: scale(1.02);
}
.author-card-body { flex: 1; min-width: 0; }
.author-card-eyebrow {
  font-family: var(--lr-font-mono, monospace);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--lr-fg-3, rgba(255,255,255,0.62));
  margin-bottom: 6px;
}
.author-card-name {
  display: inline-block;
  font-family: var(--lr-font-display, 'Unbounded', sans-serif);
  font-size: 20px;
  font-weight: 700;
  color: var(--lr-fg-1, #fff);
  letter-spacing: -0.01em;
  text-decoration: none;
  transition: color 150ms ease;
}
.author-card-name:hover { color: var(--lr-blue-soft, #5B7CFF); }
.author-card-role {
  font-family: var(--lr-font-mono, monospace);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--lr-fg-3, rgba(255,255,255,0.62));
  margin-top: 6px;
}
.author-card-bio {
  margin: 14px 0 0;
  color: var(--lr-fg-2, rgba(255,255,255,0.82));
  font-size: 15px;
  line-height: 1.6;
}
.author-card-footer {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
  margin-top: 18px;
  padding-top: 18px;
  border-top: 1px solid var(--lr-line, #1E2230);
}
.author-card-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--lr-blue-soft, #5B7CFF);
  text-decoration: none;
  font-size: 13px;
  font-weight: 500;
  transition: color 150ms ease;
}
.author-card-link:hover { color: var(--lr-fg-1, #fff); }
@media (max-width: 560px) {
  .author-card { flex-direction: column; padding: 24px; gap: 18px; }
  .author-card-photo { width: 72px; height: 72px; }
}

/* Related posts: smaller, tighter cards, more per row. */
.related-posts {
  margin-top: 80px;
  padding-top: 56px;
  border-top: 1px solid var(--lr-line, #1E2230);
}
.related-posts-title {
  font-family: var(--lr-font-display, 'Unbounded', sans-serif);
  font-size: clamp(22px, 2.4vw, 28px);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 0 0 32px;
  color: var(--lr-fg-1, #fff);
}
.related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(170px, 1fr));
  gap: 24px;
}
.related-card {
  display: flex;
  flex-direction: column;
  border-radius: var(--lr-r-md, 10px);
  overflow: hidden;
  background: transparent;
  text-decoration: none;
  color: inherit;
  transition: transform 200ms ease;
}
.related-card:hover { transform: translateY(-3px); }
.related-card:hover .related-card-cover { border-color: var(--lr-blue-soft, #5B7CFF); }
.related-card:hover .related-card-title { color: var(--lr-blue-soft, #5B7CFF); }
.related-card-cover {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  display: block;
  border-radius: var(--lr-r-md, 10px);
  border: 1px solid var(--lr-line, #1E2230);
  transition: border-color 200ms ease;
}
.related-card-body { padding: 12px 2px 0; }
.related-card-cat {
  font-family: var(--lr-font-mono, monospace);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--lr-fg-3, rgba(255,255,255,0.62));
  display: block;
  margin-bottom: 6px;
}
.related-card-title {
  font-family: var(--lr-font-display, 'Unbounded', sans-serif);
  font-size: 14px;
  font-weight: 600;
  color: var(--lr-fg-1, #fff);
  margin: 0;
  line-height: 1.3;
  letter-spacing: -0.01em;
  transition: color 200ms ease;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
@media (max-width: 520px) {
  .related-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
}