/** 
 * landing.css — Landing page specific styles (index + archive)
 * Mobile-first: base → 480px tablet → 1024px desktop
 */

:root {
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 20px;
}

/* ===== Hero Section ===== */
.hero-section {
  padding: 24px 16px 32px;
  max-width: 1200px;
  margin: 0 auto;
}

.hero-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 12px;
}

.hero-label .pulse {
  width: 8px;
  height: 8px;
  background: var(--accent);
  border-radius: 50%;
  animation: pulse 2s ease-in-out infinite;
}

.hero-title {
  font-size: 1.6rem;
  font-weight: 700;
  line-height: 1.25;
  color: var(--text-heading);
  margin-bottom: 12px;
}

.hero-excerpt {
  font-size: 1rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 16px;
  max-width: 600px;
}

.hero-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
  color: var(--text-dim);
  flex-wrap: wrap;
}

.type-badge {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  padding: 4px 12px;
  border-radius: 4px;
  background: var(--bg-code);
  color: var(--accent);
}

.hero-cta {
  display: inline-block;
  padding: 12px 24px;
  background: var(--accent);
  color: var(--bg-primary) !important;
  font-weight: 600;
  border-radius: 8px;
  text-decoration: none;
  transition: background 0.2s ease, transform 0.2s ease;
}
.hero-cta:hover { background: var(--accent-hover); text-decoration: none; }
.hero-cta:active { transform: scale(0.97); }

/* ===== Featured Banner ===== */
.featured-banner {
  max-width: 1200px;
  margin: 0 auto 32px;
  padding: 0 16px;
}

.featured-link {
  display: block;
  position: relative;
  border-radius: 12px;
  overflow: hidden;
  aspect-ratio: 16 / 9;
}

.featured-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.featured-link:hover .featured-image { transform: scale(1.03); }

.featured-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0,0,0,0.8) 0%, rgba(0,0,0,0.3) 50%, transparent 100%);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 20px;
  color: #fff;
}

.featured-overlay .tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 4px 10px;
  border-radius: 4px;
  background: var(--accent);
  color: var(--bg-primary);
  margin-bottom: 8px;
  align-self: flex-start;
}

.featured-overlay h2 {
  font-size: 1.1rem;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 4px;
}

.featured-overlay .date {
  font-size: 0.8rem;
  opacity: 0.8;
}

/* ===== Section Header ===== */
.section-header {
  max-width: 1200px;
  margin: 0 auto 20px;
  padding: 0 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.section-header h2 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-heading);
}

.section-header a {
  color: var(--text-muted);
  text-decoration: none;
  padding: 6px 14px;
  border: 1px solid var(--border-color);
  border-radius: 20px;
  background: var(--bg-card);
  transition: all 0.2s ease;
  margin-left: 4px;
}

.section-header a:hover {
  color: var(--accent);
  border-color: var(--accent);
  background: var(--accent-bg);
}

/* ===== Filter Bar ===== */
.filter-bar {
  max-width: 1200px;
  margin: 0 auto 24px;
  padding: 0 16px;
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.filter-btn {
  padding: 8px 16px;
  border: 1px solid var(--border-color);
  border-radius: 20px;
  background: var(--bg-card);
  color: var(--text-muted);
  cursor: pointer;
  transition: all 0.2s ease;
  margin-left: 4px;
}

}
.filter-btn:hover {
  border-color: var(--accent);
  color: var(--text-primary);
}
.filter-btn.active {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--bg-primary);
  font-weight: 600;
}
.filter-btn:active { transform: scale(0.96); }

/* ===== Card Grid (Mobile: 1 column) ===== */
.grid {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 16px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-bottom: 48px;
}

.card {
  display: block;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  overflow: hidden;
  text-decoration: none;
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}
.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.3);
  border-color: var(--accent);
  text-decoration: none;
}
.card:active { transform: translateY(-2px) scale(0.99); }

.card-image {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  object-position: center;
  border-bottom: 1px solid var(--border-color);
  display: block;
}

.card-image-placeholder {
  width: 100%;
  aspect-ratio: 16 / 10;
  display: flex;
  align-items: center;
  justify-content: center;
  border-bottom: 1px solid var(--border-color);
}

.card-icon {
  font-size: 2rem;
  opacity: 0.6;
}

.card-body {
  padding: 16px;
}

.card-body .tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  margin-bottom: 8px;
}

.card-body h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-heading);
  line-height: 1.3;
  margin-bottom: 6px;
}

.card-body .date {
  font-size: 0.8rem;
  color: var(--text-dim);
}

/* ===== Tablet (480px+) ===== */
@media (min-width: 480px) {
  .hero-section { padding: 32px 20px 40px; }
  .hero-title { font-size: 2rem; }
  .hero-excerpt { font-size: 1.05rem; }
  
  .featured-banner { padding: 0 20px; margin-bottom: 40px; }
  .featured-overlay { padding: 24px; }
  .featured-overlay h2 { font-size: 1.3rem; }
  
  .section-header,
  .filter-bar,
  .grid {
    padding: 0 20px;
  }
  
  .grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }
  
  .card-body h3 { font-size: 1.05rem; }
}

/* ===== Desktop (1024px+) ===== */
@media (min-width: 1024px) {
  .hero-section { padding: 40px 24px 48px; }
  .hero-title { font-size: 2.4rem; }
  .hero-excerpt { font-size: 1.1rem; max-width: 650px; }
  
  .featured-banner { padding: 0 24px; margin-bottom: 48px; }
  .featured-overlay { padding: 32px; }
  .featured-overlay h2 { font-size: 1.5rem; }
  .featured-link { aspect-ratio: 21 / 9; }
  
  .section-header,
  .filter-bar,
  .grid {
    padding: 0 24px;
  }
  
  .section-header h2 { font-size: 1.4rem; }
  
  .grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
  }
  
  .card-body { padding: 20px; }
  .card-body h3 { font-size: 1.1rem; }
}

/* ===== Extra Large (1400px+) ===== */
@media (min-width: 1400px) {
  .grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* ===== Card Tags ===== */
.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin-top: 8px;
}

.tag-pill {
  display: inline-block;
  padding: 2px 8px;
  background: var(--bg-code);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  font-size: 0.75rem;
  color: var(--text-muted);
  cursor: pointer;
  transition: background 0.2s ease, border-color 0.2s ease;
}

.tag-pill:hover {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--bg-primary);
}