/* =========================================================
   BLOG POST — shared styles for every /blog/{slug}.html page
   Imported AFTER site.css; uses the --gem-* tokens defined there.
   ========================================================= */

/* ---------- Reading progress bar ---------- */
.reading-progress {
  position: fixed; inset: 0 0 auto 0;
  height: 3px; z-index: 60;
  background: transparent; pointer-events: none;
}
.reading-progress__bar {
  height: 100%; width: 0%;
  background: linear-gradient(90deg, var(--gem-teal), var(--gem-teal-dark));
  transition: width 80ms linear;
}

/* ---------- Hero ---------- */
.post-hero {
  padding: 104px 0 0;
  background: var(--gem-off-white);
}
.post-hero__inner {
  max-width: 720px;
  margin-inline: auto;
  padding: 0 24px;
}
.post-hero__back {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 13px; font-weight: 600;
  color: var(--gem-teal-dark);
  text-decoration: none;
  margin-bottom: 32px;
  padding: 6px 14px 6px 10px;
  border-radius: 999px;
  background: var(--gem-white);
  border: 1px solid var(--gem-teal-border);
  transition: color 200ms, background 200ms, border-color 200ms;
}
.post-hero__back:hover {
  color: var(--gem-teal);
  background: var(--gem-teal-pale);
  border-color: var(--gem-teal);
}
.post-hero__back:focus-visible {
  outline: 2px solid var(--gem-teal);
  outline-offset: 2px;
}
.post-hero__category {
  display: inline-block;
  padding: 5px 12px;
  border-radius: 999px;
  font-size: 11px; font-weight: 700;
  letter-spacing: 0.08em; text-transform: uppercase;
  font-family: 'Inter', system-ui, sans-serif;
  margin-bottom: 18px;
}
.post-hero__category--strategy    { background: var(--gem-teal-pale); color: var(--gem-teal-dark); }
.post-hero__category--design      { background: var(--gem-peach);     color: var(--gem-peach-text); }
.post-hero__category--performance { background: var(--gem-sky);       color: var(--gem-sky-text); }
.post-hero__category--data        { background: var(--gem-sage);      color: var(--gem-sage-text); }
.post-hero__category--process     { background: #F3EAFD;              color: #6B46C1; }

.post-hero__title {
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-weight: 800;
  font-size: clamp(34px, 5vw, 52px);
  line-height: 1.1;
  color: var(--gem-text-primary);
  letter-spacing: -0.03em;
  margin: 0 0 18px;
  text-wrap: balance;
}
.post-hero__excerpt {
  font-size: 19px;
  line-height: 1.55;
  color: var(--gem-text-secondary);
  margin: 0 0 32px;
  max-width: 58ch;
}
.post-hero__byline {
  display: flex; align-items: center; gap: 14px;
  padding: 18px 0;
  border-top: 1px solid var(--gem-border);
  border-bottom: 1px solid var(--gem-border);
}
.post-byline__avatar {
  width: 44px; height: 44px;
  display: inline-flex; align-items: center; justify-content: center;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--gem-teal), var(--gem-teal-dark));
  color: var(--gem-white);
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-weight: 700; font-size: 15px;
  letter-spacing: 0.02em;
  flex-shrink: 0;
}
.post-byline__info { display: flex; flex-direction: column; gap: 2px; min-width: 0; }
.post-byline__name {
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-weight: 700; font-size: 15px;
  color: var(--gem-text-primary);
}
.post-byline__meta {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 13px; color: var(--gem-text-muted);
  font-family: 'Inter', system-ui, sans-serif;
}

/* ---------- Cover image (optional, sits below byline) ---------- */
.post-hero__cover {
  max-width: 1040px;
  margin: 36px auto 0;
  padding: 0 24px;
}
.post-hero__cover img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-radius: 18px;
  box-shadow:
    0 1px 3px rgba(58, 155, 171, 0.06),
    0 16px 44px rgba(20, 72, 88, 0.14);
}
@media (max-width: 720px) {
  .post-hero__cover { padding: 0 16px; margin-top: 24px; }
  .post-hero__cover img { border-radius: 12px; }
}
.post-byline__dot {
  width: 3px; height: 3px; border-radius: 50%;
  background: currentColor; opacity: 0.6;
  flex-shrink: 0;
}

/* ---------- Article body ---------- */
.post-body.prose {
  max-width: 680px;
  margin-inline: auto;
  padding: 44px 24px 8px;
}
.post-body.prose p {
  font-size: 18px;
  line-height: 1.75;
  color: var(--gem-text-secondary);
  margin-top: 22px;
}
.post-body.prose p:first-child { margin-top: 0; }
.post-body.prose h2 {
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-weight: 800;
  font-size: 28px;
  line-height: 1.2;
  color: var(--gem-text-primary);
  letter-spacing: -0.02em;
  margin: 56px 0 8px;
  padding-bottom: 0; border-bottom: 0;
  text-wrap: balance;
}
.post-body.prose h2 + p { margin-top: 14px; }

.post-body.prose ul,
.post-body.prose ol {
  margin: 22px 0 0;
  color: var(--gem-text-secondary);
}
.post-body.prose ul {
  list-style: none; padding-left: 0;
  display: flex; flex-direction: column; gap: 10px;
}
.post-body.prose ul li {
  position: relative; padding-left: 24px;
  font-size: 17px; line-height: 1.7;
}
.post-body.prose ul li::before {
  content: '';
  position: absolute; left: 4px; top: 11px;
  width: 8px; height: 8px; border-radius: 2px;
  background: var(--gem-teal); transform: rotate(45deg);
}
.post-body.prose ol {
  list-style: decimal;
  padding-left: 28px;
  display: flex; flex-direction: column; gap: 12px;
}
.post-body.prose ol li {
  padding-left: 6px;
  font-size: 17px; line-height: 1.7;
}
.post-body.prose ol li::before { content: none; }
.post-body.prose ol li::marker {
  color: var(--gem-teal-dark);
  font-weight: 700;
}

.post-body.prose blockquote {
  margin: 36px 0;
  padding: 22px 26px;
  border-left: 4px solid var(--gem-teal);
  background: var(--gem-teal-pale);
  border-radius: 0 14px 14px 0;
}
.post-body.prose blockquote p {
  margin: 0;
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 20px; line-height: 1.45;
  font-style: italic; font-weight: 500;
  color: var(--gem-text-primary);
}

.post-body.prose strong { color: var(--gem-text-primary); font-weight: 600; }
.post-body.prose em { font-style: italic; }

.post-body.prose a:not([class*="btn-"]) {
  color: var(--gem-teal-dark);
  border-bottom: 1px solid rgba(58,155,171,0.35);
  text-decoration: none;
  transition: color 200ms, border-color 200ms, background 200ms;
  padding-bottom: 1px;
}
.post-body.prose a:not([class*="btn-"]):hover {
  color: var(--gem-teal);
  border-bottom-color: var(--gem-teal);
  background: rgba(91,184,196,0.08);
}

/* ---------- CTA (OUTSIDE .prose to preserve button styling) ---------- */
.post-cta {
  max-width: 720px;
  margin: 48px auto 24px;
  padding: 40px 32px;
  background:
    radial-gradient(circle at 0% 0%, rgba(91,184,196,0.18) 0%, transparent 55%),
    linear-gradient(135deg, var(--gem-teal-pale) 0%, var(--gem-white) 100%);
  border: 1px solid var(--gem-teal-border);
  border-radius: 18px;
  text-align: center;
  box-shadow: var(--gem-shadow-sm);
}
.post-cta__title {
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-weight: 800; font-size: 24px;
  color: var(--gem-text-primary);
  letter-spacing: -0.02em;
  margin: 0 0 8px;
  text-wrap: balance;
}
.post-cta__sub {
  color: var(--gem-text-secondary); font-size: 15.5px;
  margin: 0 0 22px;
  line-height: 1.5;
}

/* ---------- Author card ---------- */
.post-author {
  max-width: 720px;
  margin: 48px auto 0;
  padding: 28px;
  display: flex; align-items: flex-start; gap: 18px;
  background: var(--gem-white);
  border: 1px solid var(--gem-border);
  border-radius: 16px;
}
.post-author__avatar {
  width: 64px; height: 64px; flex-shrink: 0;
  display: inline-flex; align-items: center; justify-content: center;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--gem-teal), var(--gem-teal-dark));
  color: var(--gem-white);
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-weight: 700; font-size: 22px;
  letter-spacing: 0.02em;
}
.post-author__body { min-width: 0; }
.post-author__name {
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-weight: 800; font-size: 18px;
  color: var(--gem-text-primary);
  margin: 0 0 4px;
  letter-spacing: -0.01em;
}
.post-author__role {
  font-size: 13px; color: var(--gem-text-muted);
  margin: 0 0 10px;
  font-family: 'Inter', system-ui, sans-serif;
}
.post-author__bio {
  font-size: 15px; color: var(--gem-text-secondary);
  line-height: 1.6; margin: 0;
}
.post-author__bio a {
  color: var(--gem-teal-dark);
  border-bottom: 1px solid rgba(58,155,171,0.35);
  text-decoration: none;
}
.post-author__bio a:hover { color: var(--gem-teal); border-bottom-color: var(--gem-teal); }

/* ---------- Prev / Next ---------- */
.post-nav {
  max-width: 720px;
  margin: 32px auto 96px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  padding: 0 24px;
}
.post-nav__item {
  display: flex; flex-direction: column; gap: 6px;
  padding: 22px 24px;
  background: var(--gem-white);
  border: 1px solid var(--gem-border);
  border-radius: 14px;
  text-decoration: none;
  transition: border-color 200ms, transform 200ms var(--gem-spring), box-shadow 200ms;
}
.post-nav__item:hover {
  border-color: var(--gem-teal-border);
  transform: translateY(-2px);
  box-shadow: var(--gem-shadow-sm);
}
.post-nav__item--prev { text-align: left; }
.post-nav__item--next { text-align: right; grid-column: 2; }
.post-nav__item--next:only-child { grid-column: 2 / -1; }
.post-nav__item--prev:only-child { grid-column: 1 / -1; }
.post-nav__label {
  font-size: 11px; font-weight: 700; letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--gem-teal-dark);
  font-family: 'Inter', system-ui, sans-serif;
}
.post-nav__title {
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-weight: 700; font-size: 16px; line-height: 1.3;
  color: var(--gem-text-primary);
}

/* ---------- Responsive ---------- */
@media (max-width: 680px) {
  .post-hero { padding: 80px 0 0; }
  .post-hero__inner,
  .post-body.prose,
  .post-cta,
  .post-author,
  .post-nav { padding-left: 20px; padding-right: 20px; }
  .post-cta { padding: 28px 20px; }
  .post-author { flex-direction: column; gap: 14px; padding: 24px; }
  .post-author__avatar { width: 56px; height: 56px; font-size: 20px; }
  .post-nav { grid-template-columns: 1fr; margin-bottom: 72px; }
  .post-nav__item--next,
  .post-nav__item--prev { grid-column: 1; text-align: left; }
  .post-body.prose p { font-size: 17px; }
  .post-body.prose h2 { font-size: 24px; margin-top: 44px; }
  .post-body.prose blockquote { padding: 16px 20px; margin: 28px 0; }
  .post-body.prose blockquote p { font-size: 18px; }
  .post-hero__excerpt { font-size: 17px; margin-bottom: 24px; }
  .post-hero__byline { padding: 14px 0; }
}

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  .reading-progress__bar,
  .post-nav__item,
  .post-hero__back,
  .post-body.prose a:not([class*="btn-"]) { transition: none; }
}