/* =========================================================
   CVC Engineers — INSIGHTS / ARTICLE styling
   ========================================================= */

/* Article hero */
.article-hero {
  padding: 180px 0 60px;
  border-bottom: 1px solid var(--line);
  background: var(--bg);
  position: relative;
}
.article-hero::before {
  content: '';
  position: absolute; inset: 0; pointer-events: none;
  background:
    radial-gradient(ellipse 60% 50% at 80% 20%, rgba(0,153,255,0.12), transparent 60%),
    radial-gradient(ellipse 40% 40% at 10% 90%, rgba(0,153,255,0.08), transparent 60%);
}
.article-hero .container { position: relative; z-index: 1; }

.article-tags {
  display: flex; gap: 8px; flex-wrap: wrap;
  margin-bottom: 24px;
  font-family: var(--mono); font-size: 11px; letter-spacing: 0.04em;
}
.article-tag {
  padding: 5px 11px;
  border: 1px solid var(--line-strong);
  border-radius: var(--r-pill);
  background: var(--frost);
  color: var(--ink-mute);
}
.article-tag.cat {
  color: var(--accent); background: var(--accent-glow);
  border-color: rgba(0,153,255,0.4);
}

.article-title {
  font-family: var(--sans); font-weight: 500;
  font-size: clamp(34px, 5.2vw, 64px);
  line-height: 1.0;
  letter-spacing: -0.04em;
  color: var(--ink);
  max-width: 900px;
  margin-bottom: 24px;
}
.article-title em {
  font-style: normal;
  background: linear-gradient(180deg, var(--accent), var(--accent-soft));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.article-lede {
  font-size: 19px; line-height: 1.55;
  color: var(--ink-mute);
  max-width: 720px;
  margin-bottom: 36px;
  letter-spacing: -0.012em;
}

.article-meta {
  display: flex; gap: 24px; align-items: center;
  flex-wrap: wrap;
  padding-top: 24px;
  border-top: 1px dashed var(--line);
  font-family: var(--mono); font-size: 11px; letter-spacing: 0.04em;
  color: var(--ink-mute);
}
.article-meta .author {
  display: flex; align-items: center; gap: 10px;
}
.article-meta .author-mark {
  width: 32px; height: 32px;
  border-radius: 50%; border: 1px solid var(--line-strong);
  background: var(--frost);
  display: flex; align-items: center; justify-content: center;
  color: var(--accent); font-size: 11px;
}
.article-meta .author-name {
  color: var(--ink); font-weight: 500;
  letter-spacing: -0.01em;
  font-family: var(--sans); font-size: 13px;
}

/* Article body */
.article-body {
  padding: 80px 0;
  background: var(--bg);
}
.article-content {
  max-width: 760px;
  margin: 0 auto;
}
.article-content h2 {
  font-family: var(--sans); font-weight: 500;
  font-size: clamp(26px, 3.4vw, 38px);
  line-height: 1.1;
  letter-spacing: -0.035em;
  color: var(--ink);
  margin-top: 56px;
  margin-bottom: 16px;
}
.article-content h2:first-child { margin-top: 0; }
.article-content h3 {
  font-family: var(--sans); font-weight: 500;
  font-size: 21px;
  line-height: 1.2;
  letter-spacing: -0.025em;
  color: var(--ink);
  margin-top: 32px;
  margin-bottom: 12px;
}
.article-content p {
  font-size: 17px; line-height: 1.7;
  color: var(--ink-mute);
  margin-bottom: 18px;
  letter-spacing: -0.012em;
}
.article-content p strong { color: var(--ink); font-weight: 500; }
.article-content p a {
  color: var(--accent);
  border-bottom: 1px dashed var(--accent);
  transition: color var(--t-fast);
}
.article-content p a:hover { color: var(--accent-soft); }

.article-content ul, .article-content ol {
  list-style: none; counter-reset: arl;
  margin: 18px 0 24px 0;
}
.article-content ul li {
  position: relative;
  padding: 8px 0 8px 28px;
  font-size: 16px; color: var(--ink-mute);
  line-height: 1.55; letter-spacing: -0.012em;
}
.article-content ul li::before {
  content: '▸';
  position: absolute; left: 0; top: 8px;
  color: var(--accent); font-size: 14px;
}
.article-content ol li {
  counter-increment: arl;
  position: relative;
  padding: 8px 0 8px 36px;
  font-size: 16px; color: var(--ink-mute);
  line-height: 1.55; letter-spacing: -0.012em;
}
.article-content ol li::before {
  content: counter(arl, decimal-leading-zero);
  position: absolute; left: 0; top: 6px;
  font-family: var(--mono); font-size: 12px;
  color: var(--accent); letter-spacing: 0.04em;
}

.article-content blockquote {
  margin: 32px 0;
  padding: 22px 28px;
  border-left: 3px solid var(--accent);
  background: var(--frost);
  border-radius: 0 var(--r-md) var(--r-md) 0;
  font-size: 18px; line-height: 1.55;
  color: var(--ink);
  letter-spacing: -0.015em;
}

.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 28px 0;
  font-size: 14.5px;
}
.article-content table th {
  text-align: left;
  padding: 12px 14px;
  font-family: var(--mono); font-size: 10.5px; letter-spacing: 0.04em;
  color: var(--ink-mute);
  border-bottom: 1px solid var(--line-strong);
}
.article-content table td {
  padding: 14px;
  border-bottom: 1px solid var(--line);
  color: var(--ink-mute);
  letter-spacing: -0.012em;
}
.article-content table td:first-child {
  color: var(--ink); font-weight: 500;
}

.article-content .key-fact {
  margin: 32px 0;
  padding: 22px 26px;
  border: 1px solid var(--accent);
  background: var(--accent-glow);
  border-radius: var(--r-md);
  font-size: 16px; line-height: 1.55;
  color: var(--ink);
  letter-spacing: -0.012em;
}
.article-content .key-fact strong { color: var(--accent); }

.article-content hr {
  border: 0; border-top: 1px dashed var(--line);
  margin: 48px 0;
}

/* Article CTA */
.article-cta {
  background: var(--bg-sub);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 64px 0;
  text-align: center;
}
.article-cta h3 {
  font-family: var(--sans); font-weight: 500;
  font-size: clamp(28px, 4vw, 44px);
  line-height: 1.0;
  letter-spacing: -0.035em;
  margin-bottom: 16px;
  color: var(--ink);
}
.article-cta h3 em {
  font-style: normal;
  background: linear-gradient(180deg, var(--accent), var(--accent-soft));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.article-cta p {
  font-size: 16px; color: var(--ink-mute);
  max-width: 540px; margin: 0 auto 28px;
  line-height: 1.55; letter-spacing: -0.012em;
}

/* Related articles */
.article-related {
  padding: 60px 0;
  background: var(--bg);
}
.article-related h3 {
  font-family: var(--mono); font-size: 11px; letter-spacing: 0.04em;
  color: var(--ink-mute);
  margin-bottom: 24px;
}
.related-grid {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.related-card {
  padding: 24px 22px;
  background: var(--frost);
  border: 1px solid var(--line);
  border-radius: var(--r-card);
  display: flex; flex-direction: column; gap: 10px;
  transition: border-color var(--t-fast), background var(--t-fast), transform var(--t-med);
}
.related-card:hover {
  border-color: var(--accent); background: var(--frost-hi);
  transform: translateY(-2px);
}
.related-card .cat {
  font-family: var(--mono); font-size: 10px; letter-spacing: 0.04em;
  color: var(--accent);
}
.related-card h4 {
  font-family: var(--sans); font-weight: 500;
  font-size: 17px; line-height: 1.25;
  letter-spacing: -0.025em;
  color: var(--ink);
}
.related-card p {
  font-size: 13.5px; color: var(--ink-mute);
  line-height: 1.5; letter-spacing: -0.012em;
}
@media (max-width: 1024px) { .related-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px)  { .related-grid { grid-template-columns: 1fr; } }

/* Insights index page */
.insights-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  margin-top: 40px;
}
.insight-card {
  background: var(--frost);
  border: 1px solid var(--line);
  border-radius: var(--r-card);
  padding: 0;
  overflow: hidden;
  display: flex; flex-direction: column;
  transition: border-color var(--t-fast), background var(--t-fast), transform var(--t-med);
  text-decoration: none;
  color: inherit;
}
.insight-card:hover {
  border-color: var(--accent); background: var(--frost-hi);
  transform: translateY(-3px);
}
.insight-card .ic-thumb {
  height: 140px;
  display: flex; align-items: center; justify-content: center;
  background:
    linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px) 0 0/16px 16px,
    linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px) 0 0/16px 16px,
    #050505;
  border-bottom: 1px dashed var(--line);
}
.insight-card .ic-thumb svg { max-width: 80%; max-height: 90px; }
.insight-card .ic-body {
  padding: 22px 24px;
  display: flex; flex-direction: column; gap: 12px;
  flex: 1;
}
.insight-card .ic-meta {
  display: flex; gap: 8px; align-items: center;
  font-family: var(--mono); font-size: 10px; letter-spacing: 0.04em;
  color: var(--ink-mute);
}
.insight-card .ic-cat {
  color: var(--accent);
  background: var(--accent-glow);
  border: 1px solid rgba(0,153,255,0.3);
  border-radius: 4px;
  padding: 3px 7px;
}
.insight-card h3 {
  font-family: var(--sans); font-weight: 500;
  font-size: 19px; line-height: 1.2;
  letter-spacing: -0.025em;
  color: var(--ink);
}
.insight-card p {
  font-size: 14px; color: var(--ink-mute);
  line-height: 1.55; letter-spacing: -0.012em;
  flex: 1;
}
.insight-card .ic-read {
  font-family: var(--mono); font-size: 10.5px; letter-spacing: 0.06em;
  color: var(--accent);
  margin-top: auto;
}
@media (max-width: 1024px) { .insights-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px)  { .insights-grid { grid-template-columns: 1fr; } }

/* Insights filter */
.insights-filters {
  display: flex; gap: 8px; flex-wrap: wrap;
  padding: 24px 0; margin-bottom: 16px;
  border-bottom: 1px solid var(--line);
}
.insights-filters .pf-filter {
  font-family: var(--mono); font-size: 11px; letter-spacing: 0.04em;
  padding: 8px 14px;
  border: 1px solid var(--line-strong);
  border-radius: var(--r-pill);
  color: var(--ink); background: var(--frost);
  cursor: pointer; transition: all var(--t-fast);
}
.insights-filters .pf-filter:hover, .insights-filters .pf-filter.is-active {
  background: var(--accent-glow); color: var(--accent); border-color: var(--accent);
}