/* ============================================================
   DEVELOPMENT SCIENCE PAGE STYLES
   ============================================================ */

/* PAGE HEADER */
.page-header {
  background: linear-gradient(135deg, rgba(0, 163, 255, 0.1) 0%, rgba(224, 169, 59, 0.05) 100%);
  border-bottom: 1px solid rgba(224, 169, 59, 0.2);
  padding: var(--spacing-4xl) var(--spacing-xl);
  text-align: center;
}

.page-header h1 {
  font-size: 2.5rem;
  margin-bottom: var(--spacing-md);
  color: var(--color-steel-gold);
}

.page-header p {
  font-size: 1.1rem;
  color: rgba(255, 255, 255, 0.7);
}

/* JOURNAL SECTION */
.journal-section {
  background: var(--color-obsidian-deep);
  padding: var(--spacing-5xl) var(--spacing-xl);
}

.articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: var(--spacing-2xl);
  margin-top: var(--spacing-3xl);
}

.journal-article {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(224, 169, 59, 0.15);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition-normal);
  opacity: 0;
  animation: fadeInUp 0.8s ease-out forwards;
  display: flex;
  flex-direction: column;
}

.journal-article:nth-child(1) { animation-delay: 0.1s; }
.journal-article:nth-child(2) { animation-delay: 0.2s; }
.journal-article:nth-child(3) { animation-delay: 0.3s; }

.journal-article:hover {
  border-color: var(--color-steel-gold);
  transform: translateY(-8px);
  box-shadow: 0 20px 40px rgba(224, 169, 59, 0.15);
  background: rgba(255, 255, 255, 0.08);
}

.article-header {
  background: linear-gradient(135deg, rgba(0, 163, 255, 0.15) 0%, rgba(224, 169, 59, 0.08) 100%);
  padding: var(--spacing-2xl);
  border-bottom: 1px solid rgba(224, 169, 59, 0.15);
}

.article-category {
  display: inline-block;
  background: var(--color-credit-blue);
  color: var(--color-obsidian-deep);
  padding: var(--spacing-sm) var(--spacing-lg);
  border-radius: var(--radius-md);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 1px;
  margin-bottom: var(--spacing-md);
}

.article-header h2 {
  font-size: 1.5rem;
  margin-bottom: var(--spacing-md);
  color: var(--color-white);
}

.article-subtitle {
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.6);
  font-style: italic;
  margin: 0;
}

.article-content {
  padding: var(--spacing-2xl);
  flex: 1;
  display: flex;
  flex-direction: column;
}

.article-content h3 {
  font-size: 1.1rem;
  margin-top: var(--spacing-lg);
  margin-bottom: var(--spacing-md);
  color: var(--color-steel-gold);
}

.article-content p {
  font-size: 0.95rem;
  color: rgba(255, 255, 255, 0.8);
  line-height: 1.8;
  margin-bottom: var(--spacing-md);
}

.article-content ul {
  list-style: none;
  padding-left: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
}

.article-content li {
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: var(--spacing-sm);
  position: relative;
  padding-left: var(--spacing-lg);
}

.article-content li::before {
  content: '▸';
  position: absolute;
  left: 0;
  color: var(--color-credit-blue);
}

.formula-box {
  background: rgba(0, 163, 255, 0.1);
  border-left: 3px solid var(--color-credit-blue);
  padding: var(--spacing-lg);
  border-radius: var(--radius-md);
  margin: var(--spacing-lg) 0;
  font-family: var(--font-mono);
  font-size: 0.9rem;
}

.formula-box p {
  margin-bottom: var(--spacing-sm);
  color: rgba(255, 255, 255, 0.85);
}

.formula-box sub {
  font-size: 0.8em;
}

.article-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--spacing-lg);
  border-top: 1px solid rgba(224, 169, 59, 0.15);
  margin-top: auto;
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.6);
}

.article-date,
.article-author {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

/* RESEARCH SECTION */
.research-section {
  background: linear-gradient(180deg, var(--color-obsidian-deep) 0%, #0F1B2E 100%);
  padding: var(--spacing-5xl) var(--spacing-xl);
}

.research-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-2xl);
  margin-top: var(--spacing-3xl);
}

.research-card {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(0, 163, 255, 0.2);
  border-radius: var(--radius-lg);
  padding: var(--spacing-2xl);
  text-align: center;
  transition: all var(--transition-normal);
  opacity: 0;
  animation: fadeInUp 0.8s ease-out forwards;
}

.research-card:nth-child(1) { animation-delay: 0.1s; }
.research-card:nth-child(2) { animation-delay: 0.2s; }
.research-card:nth-child(3) { animation-delay: 0.3s; }
.research-card:nth-child(4) { animation-delay: 0.4s; }

.research-card:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: var(--color-steel-gold);
  transform: translateY(-8px);
  box-shadow: 0 20px 40px rgba(224, 169, 59, 0.15);
}

.research-icon {
  font-size: 3rem;
  color: var(--color-steel-gold);
  margin-bottom: var(--spacing-lg);
}

.research-card h3 {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-md);
  color: var(--color-white);
}

.research-card p {
  font-size: 0.95rem;
  color: rgba(255, 255, 255, 0.75);
  margin-bottom: var(--spacing-lg);
  line-height: 1.8;
}

.research-meta {
  display: flex;
  justify-content: center;
  gap: var(--spacing-lg);
  font-size: 0.85rem;
  color: var(--color-credit-blue);
  margin-bottom: var(--spacing-lg);
}

.research-meta span {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.research-meta i {
  color: var(--color-steel-gold);
}

/* FADE IN ANIMATION */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in-visible {
  opacity: 1 !important;
  animation: fadeInUp 0.8s ease-out forwards !important;
}

/* RESPONSIVE */
@media (max-width: 1024px) {
  .articles-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .page-header h1 {
    font-size: 1.875rem;
  }

  .article-header h2 {
    font-size: 1.25rem;
  }

  .research-grid {
    grid-template-columns: 1fr;
  }

  .article-footer {
    flex-direction: column;
    gap: var(--spacing-md);
    align-items: flex-start;
  }
}