/* ============================================================
   ARTICLES — hub + article pages
   Brand-consistent, with 3D tilt cards & depth. Mobile-safe.
   ============================================================ */

/* ---------- HUB: hero ---------- */
.articles-hero h1 { max-width: 15ch; }
.articles-section { padding: var(--space-6) 0 var(--space-7); }

/* ---------- HUB: 3D tilt card grid ---------- */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: var(--space-4);
  perspective: 1400px;
}
.article-card {
  display: block; text-decoration: none;
  transform-style: preserve-3d;
  transition: transform 0.5s var(--ease-hero);
  will-change: transform;
}
.article-card-inner {
  position: relative;
  background:
    radial-gradient(circle at 1px 1px, rgba(143,208,240,0.04) 1px, transparent 0) 0 0 / 22px 22px,
    linear-gradient(150deg, rgba(30,91,191,0.06), rgba(13,20,30,0.02)), var(--charcoal-2);
  border: 1px solid rgba(143,208,240,0.14);
  border-radius: 16px;
  padding: 2rem 1.8rem 1.8rem;
  height: 100%;
  overflow: hidden;
  transition: border-color 0.5s ease, box-shadow 0.5s ease;
  transform-style: preserve-3d;
}
.article-card-glow {
  position: absolute; inset: 0; opacity: 0;
  background: radial-gradient(circle at var(--mx,80%) var(--my,0%), rgba(30,91,191,0.28), transparent 55%);
  transition: opacity 0.5s ease; pointer-events: none;
}
.article-card:hover { transform: translateY(-6px); }
.article-card:hover .article-card-inner {
  border-color: rgba(143,208,240,0.4);
  box-shadow: 0 24px 60px rgba(30,91,191,0.28);
}
.article-card:hover .article-card-glow { opacity: 1; }

.article-card-top {
  display: flex; justify-content: space-between; align-items: center;
  margin-bottom: 1.1rem;
  transform: translateZ(30px);
}
.article-card-cat {
  font-family: var(--font-mono); font-size: 0.68rem; letter-spacing: 0.16em;
  text-transform: uppercase; color: var(--cyan);
  padding: 0.3rem 0.7rem; border: 1px solid rgba(143,208,240,0.28);
  border-radius: 100px; background: rgba(30,91,191,0.08);
}
.article-card-read {
  font-family: var(--font-mono); font-size: 0.72rem;
  color: var(--silver-deep); letter-spacing: 0.05em;
}
.article-card-title {
  font-family: var(--font-display); font-size: 1.4rem; line-height: 1.2;
  color: var(--silver-light); margin-bottom: 0.75rem; letter-spacing: 0.01em;
  transform: translateZ(40px);
}
.article-card:hover .article-card-title { color: #fff; }
.article-card-excerpt {
  color: var(--silver-mid); font-size: 0.95rem; line-height: 1.55;
  margin-bottom: 1.4rem;
  transform: translateZ(20px);
}
.article-card-link {
  display: inline-flex; align-items: center; gap: 0.4rem;
  color: var(--cyan); font-weight: 600; font-size: 0.9rem;
  font-family: var(--font-mono); letter-spacing: 0.03em;
  transform: translateZ(35px);
}
.article-card-link .arrow { transition: transform 0.3s var(--ease-hero); }
.article-card:hover .article-card-link .arrow { transform: translateX(5px); }

/* ---------- ARTICLE PAGE ---------- */
.article-hero {
  position: relative; padding: var(--space-6) 0 var(--space-5);
  background: var(--near-black); border-bottom: 1px solid var(--hairline);
  overflow: hidden;
}
.article-hero-bg {
  position: absolute; inset: 0;
  background:
    radial-gradient(ellipse 60% 50% at 75% 15%, rgba(30,91,191,0.12), transparent 60%),
    linear-gradient(to right, var(--hairline) 1px, transparent 1px),
    linear-gradient(to bottom, var(--hairline) 1px, transparent 1px);
  background-size: auto, 100px 100px, 100px 100px;
  mask-image: linear-gradient(to bottom, black 55%, transparent 100%);
  -webkit-mask-image: linear-gradient(to bottom, black 55%, transparent 100%);
}
.breadcrumb {
  position: relative; z-index: 2;
  font-family: var(--font-mono); font-size: 0.75rem; letter-spacing: 0.04em;
  color: var(--silver-deep); margin-bottom: var(--space-4);
  display: flex; gap: 0.5rem; flex-wrap: wrap; align-items: center;
}
.breadcrumb a { color: var(--silver-mid); transition: color 0.3s ease; }
.breadcrumb a:hover { color: var(--cyan); }
.breadcrumb span { color: var(--silver-faint); }
.breadcrumb-current { color: var(--cyan) !important; }
.article-hero-content { position: relative; z-index: 2; max-width: 800px; }
.article-hero-content h1 {
  font-size: clamp(2rem, 4vw, 3.2rem); line-height: 1.1; margin: 0.5rem 0 1rem;
}
.article-lead {
  font-size: 1.2rem; line-height: 1.6; color: var(--silver-mid);
  max-width: 680px;
}

.article-body-wrap { max-width: 780px; margin: 0 auto; padding-top: var(--space-6); padding-bottom: var(--space-6); }
.article-body h2 {
  font-size: 1.7rem; margin: var(--space-5) 0 var(--space-2);
  color: var(--silver-light); letter-spacing: 0.01em;
  position: relative; padding-top: var(--space-3);
}
.article-body h2::before {
  content:''; position:absolute; top:0; left:0; width:36px; height:3px;
  background: linear-gradient(90deg, var(--royal-2), var(--cyan)); border-radius: 3px;
}
.article-body h3 { font-size: 1.2rem; margin: var(--space-4) 0 var(--space-2); color: var(--cyan); }
.article-body p { font-size: 1.05rem; line-height: 1.75; color: var(--silver-mid); margin-bottom: var(--space-3); }
.article-list { margin: 0 0 var(--space-3) 1.2rem; }
.article-list li { color: var(--silver-mid); line-height: 1.7; margin-bottom: 0.4rem; }

.article-callout {
  display: flex; gap: 1rem; align-items: stretch;
  background: linear-gradient(135deg, rgba(30,91,191,0.1), rgba(13,20,30,0.03)), var(--charcoal-2);
  border: 1px solid rgba(143,208,240,0.2); border-radius: 12px;
  padding: 1.4rem 1.6rem; margin: var(--space-4) 0;
}
.article-callout-bar { flex: 0 0 3px; background: linear-gradient(180deg, var(--cyan), var(--royal)); border-radius: 3px; }
.article-callout p { margin: 0; color: var(--silver-light); font-size: 1.05rem; font-style: italic; line-height: 1.65; }

/* FAQs on article page */
.article-faqs { margin-top: var(--space-6); }
.article-faq-item .accordion-content p { color: var(--silver-mid); line-height: 1.7; }

/* Article CTA */
.article-cta {
  margin-top: var(--space-6); padding: var(--space-5);
  background: linear-gradient(160deg, rgba(30,91,191,0.12), var(--charcoal-2));
  border: 1px solid rgba(143,208,240,0.2); border-radius: 18px;
  text-align: center; overflow: hidden;
}
.article-cta h2 { font-size: 1.7rem; margin-bottom: 0.75rem; }
.article-cta p { color: var(--silver-mid); max-width: 560px; margin: 0 auto var(--space-4); line-height: 1.6; }
.article-cta-actions { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; }

/* Related */
.related-articles { margin-top: var(--space-6); }
.related-grid { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-3); }
.related-card {
  display: flex; flex-direction: column; gap: 0.5rem;
  padding: 1.5rem; border: 1px solid rgba(143,208,240,0.14);
  border-radius: 12px; background: var(--charcoal-2); text-decoration: none;
  transition: transform 0.4s var(--ease-hero), border-color 0.4s ease, box-shadow 0.4s ease;
}
.related-card:hover { transform: translateY(-4px); border-color: rgba(143,208,240,0.35); box-shadow: 0 14px 36px rgba(30,91,191,0.2); }
.related-cat { font-family: var(--font-mono); font-size: 0.68rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--cyan); }
.related-title { font-family: var(--font-display); font-size: 1.15rem; color: var(--silver-light); line-height: 1.25; }
.related-link { font-family: var(--font-mono); font-size: 0.82rem; color: var(--cyan); margin-top: 0.3rem; }

/* ---------- MOBILE ---------- */
@media (max-width: 640px) {
  .articles-grid { grid-template-columns: 1fr; gap: 1.1rem; perspective: none; }
  .article-card { transform: none !important; }  /* disable tilt on touch */
  .article-card-inner { padding: 1.5rem 1.4rem; }
  .article-card-title { font-size: 1.25rem; }
  .article-card-top, .article-card-title, .article-card-excerpt, .article-card-link { transform: none; }
  .article-hero-content h1 { font-size: 1.9rem; }
  .article-lead { font-size: 1.05rem; }
  .article-body-wrap { padding-top: var(--space-4); }
  .article-body h2 { font-size: 1.4rem; }
  .article-body p { font-size: 1rem; }
  .related-grid { grid-template-columns: 1fr; }
  .article-cta { padding: 1.8rem 1.4rem; }
  .article-cta-actions .btn { width: 100%; justify-content: center; }
}
@media (prefers-reduced-motion: reduce) {
  .article-card, .article-card *, .related-card { transition: none !important; transform: none !important; }
}

/* ---------- Article banner images ---------- */
.article-banner {
  margin: 0 auto var(--space-4);
  max-width: 900px;
  border-radius: 16px;
  overflow: hidden;
  border: 1px solid rgba(143,208,240,0.18);
  box-shadow: 0 24px 60px rgba(0,0,0,0.45), 0 0 0 1px rgba(143,208,240,0.05);
  position: relative;
}
.article-banner img { display: block; width: 100%; height: auto; }

/* Hub card thumbnails */
.article-card-thumb {
  margin: -2rem -1.8rem 1.3rem;   /* bleed to card edges (matches card padding) */
  overflow: hidden;
  border-bottom: 1px solid rgba(143,208,240,0.14);
  position: relative;
  transform: translateZ(10px);
}
.article-card-thumb img {
  display: block; width: 100%; height: 190px; object-fit: cover;
  transition: transform 0.6s var(--ease-hero);
}
.article-card-thumb::after {
  content:''; position:absolute; inset:0;
  background: linear-gradient(to bottom, transparent 55%, rgba(13,17,23,0.55));
  pointer-events:none;
}
.article-card:hover .article-card-thumb img { transform: scale(1.06); }

@media (max-width: 640px) {
  .article-card-thumb { margin: -1.5rem -1.4rem 1.1rem; }
  .article-card-thumb img { height: 170px; }
  .article-banner { border-radius: 12px; }
}