/* ============================================================================
   AuthPack — Blog
   Builds on home.css (palette, fonts, .nav, .btn, .footer, .container).
   This file only adds blog-specific layout: listing, search, article prose.
   ============================================================================ */

/* ===== Shared layout ===== */
.blog-main {
  min-height: 60vh;
}

.blog-wrap {
  max-width: 920px;
  margin: 0 auto;
  padding: 0 32px;
}

.blog-wrap--wide {
  max-width: 1180px;
}

/* Breadcrumb */
.breadcrumb {
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  color: var(--ink-3);
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  align-items: center;
  margin: 28px 0 8px;
}

.breadcrumb a {
  color: var(--ink-3);
}

.breadcrumb a:hover {
  color: var(--blue);
}

.breadcrumb .sep {
  opacity: .5;
}

/* ===== Blog hero / listing header ===== */
.blog-hero {
  padding: 56px 0 24px;
  text-align: center;
}

.blog-hero h1 {
  font-size: clamp(32px, 5vw, 48px);
  line-height: 1.05;
  letter-spacing: -0.03em;
  margin: 12px 0 14px;
}

.blog-hero .grad {
  background: var(--grad-text);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.blog-hero p {
  font-size: 18px;
  color: var(--ink-3);
  max-width: 620px;
  margin: 0 auto;
}

/* ===== Search + filters ===== */
.blog-tools {
  display: flex;
  flex-direction: column;
  gap: 16px;
  align-items: center;
  margin: 32px 0 8px;
}

.blog-search {
  position: relative;
  width: 100%;
  max-width: 520px;
}

.blog-search svg {
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  width: 18px;
  height: 18px;
  color: var(--ink-3);
  pointer-events: none;
}

.blog-search input {
  width: 100%;
  padding: 14px 16px 14px 46px;
  font-family: inherit;
  font-size: 15px;
  color: var(--ink);
  background: var(--card);
  border: 1px solid var(--line-2);
  border-radius: 14px;
  outline: none;
  transition: border-color .2s ease, box-shadow .2s ease;
}

.blog-search input::placeholder {
  color: var(--ink-3);
}

.blog-search input:focus {
  border-color: var(--blue);
  box-shadow: 0 0 0 4px rgba(74, 110, 245, 0.12);
}

.blog-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
}

.filter-chip {
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  font-weight: 500;
  padding: 7px 14px;
  border-radius: 999px;
  border: 1px solid var(--line-2);
  background: var(--card);
  color: var(--ink-2);
  transition: all .18s ease;
}

.filter-chip:hover {
  border-color: var(--ink-3);
}

.filter-chip.active {
  background: var(--ink);
  color: #fff;
  border-color: var(--ink);
}

/* ===== Post grid ===== */
.post-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 22px;
  margin: 40px 0 24px;
}

@media (max-width: 760px) {
  .post-grid {
    grid-template-columns: 1fr;
  }
}

.post-card {
  display: flex;
  flex-direction: column;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 26px 26px 22px;
  transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
}

.post-card:hover {
  transform: translateY(-3px);
  border-color: var(--line-2);
  box-shadow: 0 18px 40px -22px rgba(14, 21, 48, 0.4);
}

.post-card[hidden] {
  display: none;
}

.post-card .post-meta {
  display: flex;
  gap: 10px;
  align-items: center;
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  color: var(--ink-3);
  margin-bottom: 14px;
}

.post-card .post-tag {
  padding: 3px 9px;
  border-radius: 999px;
  background: var(--grad-soft);
  border: 1px solid var(--line);
  color: var(--purple-deep);
  font-weight: 600;
}

.post-card h2 {
  font-size: 20px;
  line-height: 1.25;
  letter-spacing: -0.02em;
  margin: 0 0 10px;
}

.post-card h2 a {
  color: var(--ink);
}

.post-card:hover h2 a {
  color: var(--blue-deep);
}

.post-card p {
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--ink-3);
  margin: 0 0 18px;
  flex: 1;
}

.post-card .post-readmore {
  font-size: 14px;
  font-weight: 600;
  color: var(--blue-deep);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.post-card .post-readmore svg {
  width: 15px;
  height: 15px;
}

/* No results */
.blog-empty {
  text-align: center;
  padding: 60px 0;
  color: var(--ink-3);
}

.blog-empty[hidden] {
  display: none;
}

/* ===== Article (single post) ===== */
.article-header {
  padding: 8px 0 28px;
}

.article-header .post-meta {
  display: flex;
  gap: 10px;
  align-items: center;
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  color: var(--ink-3);
  margin-bottom: 18px;
}

.article-header .post-tag {
  padding: 3px 10px;
  border-radius: 999px;
  background: var(--grad-soft);
  border: 1px solid var(--line);
  color: var(--purple-deep);
  font-weight: 600;
}

.article-header h1 {
  font-size: clamp(30px, 4.5vw, 44px);
  line-height: 1.08;
  letter-spacing: -0.03em;
  margin: 0 0 16px;
}

.article-header .lede {
  font-size: 19px;
  line-height: 1.55;
  color: var(--ink-2);
}

.article-author {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 22px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
}

.article-author img {
  width: 40px;
  height: 40px;
}

.article-author .a-name {
  font-weight: 600;
  font-size: 14px;
}

.article-author .a-role {
  font-size: 12.5px;
  color: var(--ink-3);
}

/* Prose */
.prose {
  font-size: 17px;
  line-height: 1.72;
  color: var(--ink-2);
}

.prose>*+* {
  margin-top: 22px;
}

.prose h2 {
  font-size: 26px;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--ink);
  margin-top: 48px;
}

.prose h3 {
  font-size: 20px;
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--ink);
  margin-top: 36px;
}

.prose a {
  color: var(--blue-deep);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.prose a:hover {
  color: var(--blue);
}

.prose ul,
.prose ol {
  padding-left: 24px;
}

.prose li+li {
  margin-top: 8px;
}

.prose strong {
  color: var(--ink);
  font-weight: 600;
}

.prose blockquote {
  border-left: 3px solid var(--blue);
  padding: 4px 0 4px 22px;
  color: var(--ink-2);
  font-style: italic;
}

.prose code {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.88em;
  background: var(--bg-warm);
  border: 1px solid var(--line);
  padding: 2px 6px;
  border-radius: 6px;
}

.prose img {
  border-radius: var(--radius);
  border: 1px solid var(--line);
  margin: 28px 0;
}

.prose hr {
  border: none;
  border-top: 1px solid var(--line);
  margin: 40px 0;
}

/* Callout / key takeaway */
.callout {
  background: var(--grad-soft);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px 24px;
}

.callout .callout-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--purple-deep);
  margin-bottom: 8px;
}

/* FAQ block */
.faq {
  margin-top: 16px;
}

.faq details {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 4px 20px;
  margin-bottom: 12px;
  background: var(--card);
}

.faq summary {
  font-weight: 600;
  font-size: 16px;
  padding: 16px 0;
  cursor: pointer;
  list-style: none;
  color: var(--ink);
}

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

.faq summary::after {
  content: "+";
  float: right;
  color: var(--ink-3);
  font-weight: 400;
}

.faq details[open] summary::after {
  content: "–";
}

.faq details p {
  padding: 0 0 18px;
  margin: 0;
  color: var(--ink-2);
  font-size: 15.5px;
  line-height: 1.65;
}

/* Article CTA */
.article-cta {
  margin: 56px 0 8px;
  background: var(--ink);
  border-radius: var(--radius-xl);
  padding: 40px;
  text-align: center;
  color: #fff;
}

.article-cta h3 {
  font-size: 24px;
  letter-spacing: -0.02em;
  margin: 0 0 10px;
  color: #fff;
}

.article-cta p {
  color: rgba(255, 255, 255, 0.7);
  margin: 0 0 22px;
  font-size: 15.5px;
}

/* Related / back link */
.article-foot {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  margin: 48px 0 0;
  padding-top: 28px;
  border-top: 1px solid var(--line);
}

.article-foot a.back {
  font-weight: 600;
  color: var(--blue-deep);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.article-share {
  display: flex;
  gap: 8px;
}

/* ===== Mobile ===== */
@media (max-width: 600px) {
  .blog-wrap {
    padding: 0 16px;
  }

  .blog-hero {
    padding: 40px 0 16px;
  }

  .post-grid {
    grid-template-columns: 1fr;
    gap: 16px;
    margin: 28px 0 16px;
  }

  .prose {
    font-size: 16px;
  }

  .prose h2 {
    font-size: 23px;
    margin-top: 38px;
  }

  .prose h3 {
    font-size: 19px;
  }

  .article-cta {
    padding: 32px 22px;
  }

  .article-header h1 {
    font-size: clamp(26px, 7vw, 34px);
  }
}