/* ============================================================
   ZERONE VENTURES — insights.css
   Listing page. Inherits base from styles.css.
   ============================================================ */

/* =============== INSIGHTS HERO =============== */
.insights-hero {
  padding: clamp(8rem, 12vh, 10rem) 0 var(--space-xl);
  position: relative;
  overflow: hidden;
}

.insights-hero::before {
  content: '';
  position: absolute;
  top: -10%;
  left: 50%;
  transform: translateX(-50%);
  width: 70%;
  height: 100%;
  background: radial-gradient(ellipse at top,
    rgba(212, 165, 116, 0.05) 0%,
    transparent 60%);
  pointer-events: none;
  z-index: 0;
}

.insights-hero-inner {
  max-width: 56rem;
  position: relative;
  z-index: 2;
}

.insights-title {
  font-size: clamp(2.5rem, 1.8rem + 3vw, 4.5rem);
  font-weight: 500;
  line-height: 1.02;
  letter-spacing: -0.04em;
  color: var(--text);
  margin: var(--space-md) 0 var(--space-lg);
}

.insights-intro {
  font-size: var(--fs-lead);
  line-height: 1.5;
  color: var(--text-muted);
  max-width: 48rem;
  font-weight: 300;
}

/* =============== FILTER TABS =============== */
.insights-filter {
  padding: var(--space-md) 0 var(--space-xl);
  border-bottom: 1px solid var(--border);
}

.filter-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.filter-tab {
  padding: 0.5rem 1rem;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  color: var(--text-muted);
  font-family: var(--font-sans);
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: -0.005em;
  cursor: pointer;
  transition: background var(--dur-fast) var(--ease-out),
              border-color var(--dur-fast) var(--ease-out),
              color var(--dur-fast) var(--ease-out);
}

.filter-tab:hover {
  border-color: var(--border-hov);
  color: var(--text);
}

.filter-tab.active {
  background: var(--text);
  border-color: var(--text);
  color: var(--bg);
}

/* =============== FEATURED CARD =============== */
.insights-featured {
  padding: var(--space-xl) 0;
}

.featured-card a {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: clamp(2rem, 4vw, 4rem);
  align-items: center;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--surface);
  transition: background var(--dur-med) var(--ease-out),
              border-color var(--dur-med) var(--ease-out),
              transform var(--dur-med) var(--ease-out);
}

.featured-card a:hover {
  background: var(--surface-hov);
  border-color: var(--border-hov);
}

.featured-image {
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background: var(--bg-elev-2);
}

.featured-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--dur-slow) var(--ease-out);
}

.featured-card a:hover .featured-image img {
  transform: scale(1.04);
}

.featured-body {
  padding: var(--space-xl) var(--space-xl) var(--space-xl) 0;
}

.featured-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8125rem;
  color: var(--text-muted);
  margin-bottom: var(--space-md);
}

.article-dot { color: var(--text-dim); }

.featured-title {
  font-size: clamp(1.75rem, 1.3rem + 1.8vw, 2.75rem);
  font-weight: 500;
  line-height: 1.05;
  letter-spacing: -0.035em;
  color: var(--text);
  margin-bottom: var(--space-md);
  transition: color var(--dur-fast) var(--ease-out);
}

.featured-title .serif-italic {
  display: block;
  font-family: var(--font-serif);
  font-style: italic;
  font-weight: 400;
  letter-spacing: -0.015em;
  margin-top: 0.1em;
}

.featured-card a:hover .featured-title { color: var(--accent); }

.featured-excerpt {
  font-size: var(--fs-lead);
  line-height: 1.5;
  color: var(--text-muted);
  margin-bottom: var(--space-lg);
  font-weight: 300;
  max-width: 36rem;
}

.featured-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--accent);
}

.featured-link svg {
  transition: transform var(--dur-med) var(--ease-out);
}

.featured-card a:hover .featured-link svg {
  transform: translateX(4px);
}

/* =============== ARTICLES GRID =============== */
.insights-grid-section {
  padding: var(--space-xl) 0 var(--space-3xl);
}

.grid-heading {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: clamp(1.5rem, 1.2rem + 1.2vw, 2rem);
  font-weight: 400;
  letter-spacing: -0.015em;
  color: var(--text);
  margin-bottom: var(--space-xl);
  padding-bottom: var(--space-md);
  border-bottom: 1px solid var(--border);
}

.insights-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl) var(--space-lg);
}

/* Override the homepage news-card 2-col limit for this page */
.insights-grid .news-card a {
  display: block;
  color: var(--text);
  height: 100%;
}

.insights-grid .news-image {
  aspect-ratio: 16 / 10;
  overflow: hidden;
  border-radius: var(--radius-md);
  margin-bottom: var(--space-md);
  background: var(--bg-elev-2);
}

.insights-grid .news-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--dur-slow) var(--ease-out);
}

.insights-grid .news-card:hover .news-image img {
  transform: scale(1.04);
}

.news-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
}

.insights-grid .news-title {
  font-size: clamp(1.0625rem, 0.95rem + 0.5vw, 1.25rem);
  font-weight: 500;
  line-height: 1.3;
  letter-spacing: -0.02em;
  color: var(--text);
  margin-bottom: 0.625rem;
  transition: color var(--dur-fast) var(--ease-out);
}

.insights-grid .news-card:hover .news-title {
  color: var(--accent);
}

.news-excerpt {
  font-size: 0.9375rem;
  line-height: 1.5;
  color: var(--text-muted);
  font-weight: 300;
}

/* =============== EMPTY STATE =============== */
.empty-state {
  text-align: center;
  padding: var(--space-2xl) 0;
  color: var(--text-muted);
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 1.25rem;
}

/* =============== RESPONSIVE =============== */
@media (max-width: 968px) {
  .featured-card a {
    grid-template-columns: 1fr;
  }

  .featured-body {
    padding: 0 var(--space-lg) var(--space-lg);
  }

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

@media (max-width: 640px) {
  .insights-grid {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
  }

  .filter-tabs {
    overflow-x: auto;
    flex-wrap: nowrap;
    padding-bottom: 0.5rem;
    margin: 0 calc(var(--gutter) * -1);
    padding-left: var(--gutter);
    padding-right: var(--gutter);
    scrollbar-width: none;
  }

  .filter-tabs::-webkit-scrollbar { display: none; }

  .filter-tab {
    flex-shrink: 0;
  }
}