/* ==========================================================================
   Blog article pages — premium reading experience
   ========================================================================== */

.article-page {
  background: var(--surface);
}

/* Reading progress */
.reading-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 0%;
  background: linear-gradient(90deg, var(--accent) 0%, var(--accent-orange) 100%);
  z-index: 200;
  transition: width 0.08s linear;
  box-shadow: 0 0 12px rgba(92, 74, 224, 0.5);
}

/* Cinematic hero */
.article-hero {
  position: relative;
  min-height: 460px;
  display: flex;
  align-items: flex-end;
  overflow: hidden;
}

.article-hero-media {
  position: absolute;
  inset: 0;
}

.image-credit {
  margin: 0;
  font-size: 11px;
  line-height: 1.4;
  color: var(--text-muted);
}

.image-credit a {
  color: inherit;
  text-decoration: underline;
  text-underline-offset: 2px;
}

.image-credit--hero {
  position: absolute;
  right: 16px;
  bottom: 12px;
  z-index: 3;
  max-width: min(280px, 45%);
  font-size: 10px;
  text-align: right;
  color: rgba(255, 255, 255, 0.65);
}

.image-credit--hero a {
  color: rgba(255, 255, 255, 0.9);
}

.article-hero-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transform: scale(1.02);
}

.article-hero-media img.vendor-diagram {
  object-fit: contain;
  object-position: center top;
  transform: none;
  background: #0a1628;
  padding: 1.5rem 1rem 3rem;
}

.article-hero-overlay {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(8, 20, 41, 0.35) 0%, rgba(8, 20, 41, 0.75) 55%, rgba(8, 20, 41, 0.95) 100%),
    radial-gradient(ellipse 80% 60% at 70% 0%, rgba(92, 74, 224, 0.25) 0%, transparent 55%);
}

.article-hero-inner {
  position: relative;
  z-index: 2;
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 4.5rem 24px 4rem;
}

.article-breadcrumb {
  margin: 0 0 1.25rem;
  font-size: 13px;
}

.article-breadcrumb a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: rgba(255, 255, 255, 0.75);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s ease;
}

.article-breadcrumb a:hover {
  color: #fff;
}

.article-hero-tag {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #fff;
  background: rgba(92, 74, 224, 0.45);
  border: 1px solid rgba(255, 255, 255, 0.2);
  backdrop-filter: blur(8px);
  padding: 6px 14px;
  border-radius: 999px;
  margin-bottom: 1rem;
}

.article-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 800;
  line-height: 1.12;
  letter-spacing: -0.03em;
  color: #fff;
  margin: 0 0 1.5rem;
  max-width: 18ch;
}

.article-hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 20px;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.7);
}

.article-hero-meta span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.article-hero-meta span::before {
  content: "·";
  color: rgba(255, 255, 255, 0.35);
  margin-right: 4px;
}

.article-hero-meta span:first-child::before {
  display: none;
}

/* Body layout */
.article-body-wrap {
  margin-top: 0;
  position: relative;
  z-index: 3;
  padding: 2.5rem 0 2rem;
  background: var(--surface);
}

.article-body-wrap .section-inner {
  padding-top: 0;
}

.article-layout {
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  gap: 56px;
  align-items: start;
}

.article-sidebar {
  position: sticky;
  top: 7.5rem;
  align-self: start;
  max-height: calc(100vh - 8.5rem);
  overflow-y: auto;
  padding-right: 4px;
  scrollbar-width: thin;
}

.article-toc-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.25rem 1.25rem 1rem;
  box-shadow: var(--shadow-card);
  margin-bottom: 1rem;
}

.article-toc-label {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin: 0 0 0.75rem;
}

.article-toc {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.article-toc a {
  display: block;
  font-size: 13px;
  line-height: 1.45;
  color: var(--text-muted);
  text-decoration: none;
  padding: 8px 10px;
  border-radius: 8px;
  border-left: 2px solid transparent;
  transition: all 0.2s ease;
}

.article-toc a:hover {
  color: var(--accent);
  background: var(--accent-subtle);
}

.article-toc a.active {
  color: var(--accent);
  font-weight: 600;
  border-left-color: var(--accent);
  background: var(--accent-subtle);
}

.article-sidebar-cta {
  background: linear-gradient(145deg, var(--navy) 0%, #1a2d5c 100%);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  color: rgba(255, 255, 255, 0.85);
}

.article-sidebar-cta p {
  font-size: 13px;
  margin: 0 0 1rem;
  line-height: 1.5;
}

.article-sidebar-cta .btn {
  width: 100%;
  text-align: center;
  font-size: 14px;
  padding: 10px 16px;
}

/* Article content */
.article-content {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2.5rem 2.75rem;
  box-shadow: var(--shadow-md);
  font-size: 17px;
  line-height: 1.8;
  color: var(--text-soft);
}

.article-lead {
  font-size: 1.2rem !important;
  line-height: 1.75 !important;
  color: var(--navy) !important;
  font-weight: 500;
  margin-bottom: 2rem !important;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--border);
}

.article-content > p:first-child {
  font-size: 1.2rem;
  line-height: 1.75;
  color: var(--navy);
  font-weight: 500;
  margin-bottom: 2rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--border);
}

.article-content h2 {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--navy);
  margin: 2.75rem 0 1rem;
  padding-top: 0.5rem;
  letter-spacing: -0.02em;
  scroll-margin-top: 7.5rem;
}

.article-content h2:first-of-type {
  margin-top: 0;
}

.article-content h3 {
  font-family: var(--font-display);
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--navy);
  margin: 2rem 0 0.75rem;
}

.article-content p {
  margin: 0 0 1.35rem;
}

.article-content a {
  color: var(--accent);
  font-weight: 500;
  text-decoration: underline;
  text-decoration-color: rgba(92, 74, 224, 0.35);
  text-underline-offset: 3px;
}

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

.article-content ul,
.article-content ol {
  margin: 0 0 1.5rem;
  padding-left: 1.35rem;
}

.article-content li {
  margin-bottom: 0.65rem;
}

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

.article-content strong {
  color: var(--navy);
  font-weight: 600;
}

.article-content pre {
  background: var(--navy-dark);
  color: #c8d3e8;
  padding: 1.35rem 1.5rem;
  border-radius: var(--radius);
  overflow-x: auto;
  font-size: 13px;
  line-height: 1.65;
  margin: 1.75rem 0;
  border: 1px solid rgba(255, 255, 255, 0.06);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.04);
}

.article-content code {
  font-family: ui-monospace, "SF Mono", Monaco, monospace;
  font-size: 0.88em;
}

.article-content p code,
.article-content li code {
  background: var(--accent-subtle);
  color: var(--accent-dark);
  padding: 2px 7px;
  border-radius: 5px;
  font-weight: 500;
}

.article-content pre code {
  background: transparent;
  color: inherit;
  padding: 0;
}

.article-callout {
  position: relative;
  background: linear-gradient(135deg, rgba(92, 74, 224, 0.06) 0%, rgba(245, 130, 32, 0.06) 100%);
  border: 1px solid rgba(92, 74, 224, 0.15);
  border-radius: var(--radius-lg);
  padding: 1.35rem 1.5rem 1.35rem 1.25rem;
  margin: 2rem 0;
  font-size: 15px;
  line-height: 1.7;
}

.article-callout::before {
  content: "";
  position: absolute;
  left: 0;
  top: 12px;
  bottom: 12px;
  width: 4px;
  border-radius: 4px;
  background: var(--gradient-accent);
}

.article-callout strong {
  display: block;
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.5rem;
}

/* End CTA */
.article-end-cta {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 24px 3rem;
}

.article-end-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  flex-wrap: wrap;
  background: var(--gradient-mesh);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2rem 2.25rem;
  box-shadow: var(--shadow-card);
}

.article-end-card h3 {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--navy);
  margin: 0 0 0.35rem;
}

.article-end-card p {
  margin: 0;
  font-size: 14px;
  color: var(--text-muted);
}

/* Related */
.related-posts-section {
  padding: 4rem 24px;
}

.related-posts-section .section-header {
  margin-bottom: 2rem;
}

.related-posts-section .related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.related-posts-section .related-grid .blog-card {
  height: 100%;
}

.article-end-card a:not(.btn) {
  color: var(--accent);
  font-weight: 500;
}

/* Article nav */
.article-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px 2rem;
}

.article-nav a {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 1.25rem 1.5rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  text-decoration: none;
  transition: all 0.25s ease;
}

.article-nav a:hover {
  border-color: rgba(92, 74, 224, 0.3);
  box-shadow: var(--shadow-card);
  transform: translateY(-2px);
}

.article-nav a.next {
  text-align: right;
  align-items: flex-end;
}

.article-nav-label {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.article-nav-title {
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 600;
  color: var(--navy);
}

@media screen and (max-width: 1024px) {
  .article-body-wrap {
    padding: 2rem 0 1.5rem;
  }

  .article-layout {
    grid-template-columns: 1fr;
    gap: 0;
  }

  .related-posts-section .related-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .article-sidebar {
    position: static;
    order: 2;
    margin-top: 2.5rem;
    max-height: none;
    overflow: visible;
    padding-right: 0;
  }

  .article-toc-card {
    display: none;
  }

  .article-sidebar-cta {
    text-align: center;
  }

  .article-hero h1 {
    max-width: none;
  }

  .article-content {
    padding: 2rem 1.75rem;
  }
}

@media screen and (max-width: 767px) {
  .article-hero {
    min-height: 380px;
  }

  .article-hero-inner {
    padding: 2rem 16px 2.5rem;
  }

  .article-content {
    padding: 1.5rem 1.25rem;
    font-size: 16px;
  }

  .article-end-card {
    flex-direction: column;
    text-align: center;
    padding: 1.5rem;
  }

  .article-nav {
    grid-template-columns: 1fr;
    padding: 0 16px 2rem;
  }

  .article-nav a.next {
    text-align: left;
    align-items: flex-start;
  }

  .related-posts-section .related-grid {
    grid-template-columns: 1fr;
  }
}