/* ==========================================================================
   HailGeeks Blog — article page: header, hero, TOC, reading column, body
   typography, tags, share, fixed post-article CTA, related articles.
   ========================================================================== */

.article-shell {
  max-width: var(--container-lg);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.article-head-col,
.article-col {
  width: 100%;
  max-width: var(--reading-col-max);
  margin: 0 auto;
  min-width: 0;
}

/* ---------- Article header ---------- */

.article-header {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-divider);
}

.article-cat-pill {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 11.5px;
  font-weight: 800;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--cat-color, var(--color-blue));
  background: var(--cat-soft, var(--color-blue-soft));
  border: 1px solid var(--color-blue-soft-border);
  border-radius: var(--radius-pill);
  padding: 6px 14px;
  margin: 20px 0 0;
}

.article-cat-pill i { font-size: 11px; }

.article-title {
  font-size: clamp(30px, 4.4vw, 44px);
  font-weight: 800;
  letter-spacing: -.025em;
  line-height: 1.1;
  color: var(--color-heading);
  text-wrap: balance;
  margin: 16px 0 0;
  overflow-wrap: anywhere;
}

.article-excerpt {
  font-size: clamp(17px, 2.2vw, 20px);
  line-height: 1.5;
  color: var(--color-muted);
  font-weight: 500;
  margin: 14px 0 0;
}

/* ---------- Byline / metadata ---------- */

.article-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px 18px;
  margin: 22px 0 0;
  padding: 18px 0 0;
  border-top: 1px solid var(--color-border-soft);
}

.article-meta__author {
  display: flex;
  align-items: center;
  gap: 11px;
}

.article-meta__avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--color-navy);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 800;
  overflow: hidden;
  flex: none;
  text-transform: uppercase;
}

.article-meta__avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.article-meta__lines { line-height: 1.35; }

.article-meta__by {
  display: block;
  font-size: 14px;
  font-weight: 700;
  color: var(--color-ink);
}

.article-meta__by a { color: var(--color-ink); }
.article-meta__by a:hover { color: var(--color-blue-hover); }

.article-meta__updated,
.article-meta__reviewed {
  display: block;
  font-size: 12.5px;
  color: var(--color-muted);
}

.article-meta__updated i { color: var(--color-blue); font-size: 11px; }

.article-meta__read {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--color-muted);
  font-weight: 600;
  margin-left: auto;
}

/* ---------- Hero (21:9 on every breakpoint) ---------- */

.article-hero {
  position: relative;
  aspect-ratio: var(--ratio-hero);
  border-radius: 14px;
  overflow: hidden;
  background: linear-gradient(135deg, #0b2e4e 0%, #154b7e 55%, #1277e1 130%);
}

.article-hero img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.article-hero__icon {
  position: absolute;
  right: 28px;
  bottom: 16px;
  font-size: 88px;
  color: rgba(255, 255, 255, .12);
}

.article-hero-caption,
.figure-caption {
  font-size: 13px;
  color: var(--color-muted);
  font-style: italic;
  margin: 10px 2px 0;
}

/* ---------- Body grid + TOC ---------- */

.article-body-band { background: var(--color-page); }

.article-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, var(--reading-col-max)) minmax(0, 1fr);
  gap: 32px;
  align-items: start;
}

.article-toc {
  position: sticky;
  top: 24px;
  justify-self: end;
  width: 210px;
}

.article-toc__label {
  font-size: 11px;
  font-weight: 800;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--color-muted);
  margin: 0 0 12px 13px;
}

.toc-link {
  display: block;
  font-size: 13.5px;
  line-height: 1.45;
  color: var(--color-muted);
  font-weight: 600;
  padding: 6px 0 6px 13px;
  border-left: 2px solid var(--color-border-chip);
}

.toc-link:hover { color: var(--color-blue); border-color: var(--color-blue); }

/* Hide the TOC entirely when the article has no anchored H2 headings */
.article-toc:not(:has(.toc-link)) { visibility: hidden; }
.article-toc-mobile:not(:has(.toc-link)) { display: none !important; }

/* Mobile collapsible TOC */
.article-toc-mobile {
  display: none;
  margin: 0 0 24px;
  background: var(--color-surface);
  border: 1px solid var(--color-border-chip);
  border-radius: var(--radius-md);
  padding: 4px 16px;
}

.article-toc-mobile summary {
  list-style: none;
  cursor: pointer;
  padding: 12px 0;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--color-heading);
  display: flex;
  align-items: center;
  gap: 8px;
}

.article-toc-mobile summary::-webkit-details-marker { display: none; }
.article-toc-mobile summary i { color: var(--color-blue); }
.article-toc-mobile nav { padding: 0 0 12px; }

@media (max-width: 1320px) {
  .article-grid { grid-template-columns: minmax(0, 1fr); }
  .article-toc { display: none; }
}

@media (max-width: 1080px) {
  .article-toc-mobile { display: block; }
}

/* ---------- Reading-column typography (rich text) ---------- */

.article-col p {
  font-size: var(--text-body);
  line-height: var(--lh-body);
  color: var(--color-body-strong);
  margin: 0 0 22px;
}

.article-col h2 {
  font-size: 26px;
  font-weight: 800;
  letter-spacing: -.02em;
  color: var(--color-heading);
  line-height: 1.2;
  margin: 40px 0 14px;
  scroll-margin-top: 20px;
}

.article-col h3 {
  font-size: 20px;
  font-weight: 800;
  color: var(--color-heading);
  line-height: 1.3;
  margin: 28px 0 10px;
  scroll-margin-top: 20px;
}

.article-col a { color: var(--color-blue); }
.article-col a:hover { color: var(--color-blue-hover); text-decoration: underline; }

.article-col ul,
.article-col ol {
  margin: 0 0 22px;
  padding-left: 2px;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 11px;
  counter-reset: li;
}

.article-col li {
  font-size: 17px;
  line-height: 1.6;
  color: var(--color-body-strong);
  display: block;
  position: relative;
  padding-left: 36px;
}

.article-col ul li::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 0;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-blue);
  margin-top: 9px;
}

.article-col ol li { counter-increment: li; }

.article-col ol li::before {
  content: counter(li);
  position: absolute;
  left: 0;
  top: 0;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--color-blue-soft);
  color: var(--color-blue);
  font-size: 13px;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: 1px;
}

.article-col code {
  font-family: var(--font-mono);
  font-size: .92em;
  background: var(--color-chip-bg);
  border-radius: 5px;
  padding: 1px 5px;
}

/* ---------- Tags ---------- */

.article-tags {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  padding: 20px 0 0;
  border-top: 1px solid var(--color-border-soft);
}

.article-tags__label {
  font-size: 12.5px;
  font-weight: 700;
  color: var(--color-muted);
}

.article-tags .tag-pill {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-body);
  background: var(--color-chip-bg);
  border: 1px solid var(--color-border-chip);
  border-radius: var(--radius-pill);
  padding: 6px 13px;
}

.article-tags .tag-pill:hover { color: var(--color-blue-hover); border-color: var(--color-border-blue); }

/* ---------- Share ---------- */

.article-share {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  padding: 18px 0 0;
  margin: 14px 0 0;
  border-top: 1px solid var(--color-border-soft);
}

.article-share__label {
  font-size: 12.5px;
  font-weight: 700;
  color: var(--color-muted);
}

.article-share a,
.article-share button {
  width: 40px;
  height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-border-chip);
  border-radius: 10px;
  color: var(--color-navy);
  background: transparent;
  cursor: pointer;
}

.article-share a:hover,
.article-share button:hover {
  border-color: var(--color-border-blue);
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-1px);
}

/* Copy-link is a JS enhancement; hidden until enabled */
.article-share [data-copy-link] { display: none; }
.js .article-share [data-copy-link] { display: inline-flex; }

/* ---------- Fixed post-article CTA ---------- */

.fixed-article-cta {
  background: linear-gradient(120deg, #eef5fe, #e7f0fc);
  border: 1px solid #d6e6fa;
  border-radius: var(--radius-card);
  padding: 28px clamp(22px, 4vw, 34px);
  text-align: center;
}

.fixed-article-cta__icon {
  width: 52px;
  height: 52px;
  margin: 0 auto 14px;
  border-radius: 14px;
  background: var(--color-blue);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 21px;
}

.fixed-article-cta__heading {
  font-size: clamp(21px, 2.6vw, 26px);
  font-weight: 800;
  letter-spacing: -.02em;
  color: var(--color-heading);
  margin: 0;
  text-wrap: balance;
}

.fixed-article-cta__text {
  font-size: 15px;
  line-height: 1.55;
  color: var(--color-body);
  margin: 10px auto 20px;
  max-width: 460px;
}

.fixed-article-cta__actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
}

.fixed-article-cta__actions .btn {
  min-height: 50px;
  height: auto;
  padding: 12px 26px;
  font-size: 15px;
}

/* ---------- Related articles ---------- */

.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

@media (max-width: 900px) {
  .related-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 620px) {
  .related-grid { grid-template-columns: 1fr; }
  .article-col p { font-size: 16.5px; }
  .article-col h2 { font-size: 23px; }
  .article-meta { gap: 8px 14px; }
  .fixed-article-cta__actions .btn { width: 100%; }
}