/* ============================================================
   Blog Articles Styling Module
   Distraction-free reading experience with smooth transitions
   ============================================================ */

/* Article Modal Container */
.article-modal {
  position: fixed;
  inset: 0;
  z-index: 1200;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  overflow-y: auto;
  opacity: 0;
  pointer-events: none;
  transition: opacity 300ms cubic-bezier(0.4, 0, 0.2, 1);
  padding: var(--space-md);
}

.article-modal.is-open {
  opacity: 1;
  pointer-events: auto;
}

.article-modal.is-open .article-container {
  animation: slideUp 400ms cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

.article-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(9, 20, 32, 0.7);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.article-container {
  position: relative;
  z-index: 1;
  max-width: 56rem; /* constrain reading measure for improved legibility */
  width: 100%;
  background: var(--white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  max-height: 90vh;
  overflow-y: auto;
  margin-top: 40px;
  margin-bottom: 40px;
  opacity: 0;
}

/* Article Header */
.article-header {
  position: sticky;
  top: 0;
  padding: var(--space-sm) var(--space-md);
  background: linear-gradient(135deg, var(--white) 0%, var(--muted) 100%);
  border-bottom: 1px solid var(--line);
  z-index: 10;
}

.article-close {
  background: none;
  border: none;
  color: var(--blue);
  font-weight: 600;
  cursor: pointer;
  padding: 8px 0;
  font-size: 16px;
  transition: all 200ms ease;
  display: flex;
  align-items: center;
  gap: 4px;
}

.article-close:hover {
  color: var(--blue-dark);
  gap: 8px;
}

/* Article Content */
.article-content {
  padding: 3rem; /* generous side padding for comfortable reading */
  line-height: 1.95; /* improved leading for readability */
}

.prose-article {
  font-size: 18px;
  color: var(--ink);
  max-width: 56rem;
  margin: 0 auto; /* center text column inside the container */
}

.article-meta {
  display: flex;
  gap: var(--space-sm);
  align-items: center;
  margin-bottom: var(--space-md);
  flex-wrap: wrap;
  font-size: 14px;
  color: var(--grey);
}

.article-meta .meta-sep {
  margin: 0 6px;
}

.article-meta .category {
  display: inline-block;
  background: var(--blue-light);
  color: var(--blue-dark);
  padding: 4px 10px;
  border-radius: 20px;
  font-weight: 600;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.article-content > h1 {
  font-size: 1.8rem; /* downscale main title for a balanced reading layout */
  font-weight: 800;
  font-family: var(--font-display);
  line-height: 1.2;
  margin: var(--space-md) 0 var(--space-sm);
  color: var(--ink);
}

.article-excerpt {
  font-size: 1.2rem;
  color: var(--ink-soft);
  font-weight: 500;
  margin-bottom: var(--space-md);
  font-style: italic;
}

.divider {
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--line), transparent);
  margin: var(--space-lg) 0;
}

/* Article Typography */
.prose-article h2 {
  font-size: 1.6rem;
  font-weight: 700;
  font-family: var(--font-display);
  margin: var(--space-lg) 0 var(--space-md);
  color: var(--ink); /* standard weight/color for section subtitles */
}

.prose-article h3 {
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--ink);
  margin: var(--space-md) 0 var(--space-sm);
}

.prose-article p {
  margin-bottom: var(--space-md);
  line-height: 1.95; /* more relaxed leading for long-form reading */
  color: var(--ink);
}

.prose-article ul,
.prose-article ol {
  margin-left: var(--space-md);
  margin-bottom: var(--space-md);
}

.prose-article li {
  margin-bottom: var(--space-sm);
  line-height: 1.7;
}

.prose-article strong {
  font-weight: 700;
  color: var(--blue-dark);
}

.prose-article em {
  font-style: italic;
  color: var(--grey);
}

/* Article CTA */
.article-cta {
  background: linear-gradient(135deg, var(--blue-light), var(--muted));
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  margin: var(--space-lg) 0 0;
  text-align: center;
}

.article-cta p {
  margin: 0 0 var(--space-sm);
  color: var(--ink);
}

.article-cta .cta-button {
  display: inline-block;
  padding: 12px 28px;
  background: var(--blue);
  color: var(--white);
  text-decoration: none;
  border-radius: var(--radius);
  font-weight: 600;
  transition: all 200ms ease;
  box-shadow: var(--shadow-blue);
  margin-top: var(--space-sm);
}

.article-cta .cta-button:hover {
  background: var(--blue-dark);
  transform: translateY(-2px);
  box-shadow: 0 12px 40px rgba(46, 134, 222, 0.35);
}

/* Responsive */
@media (max-width: 768px) {
  .article-modal {
    padding: var(--space-sm);
  }

  .article-container {
    margin-top: 20px;
    margin-bottom: 20px;
    border-radius: var(--radius);
    max-height: 95vh;
  }

  .article-content {
    padding: var(--space-md);
  }

  .article-content > h1 {
    font-size: 1.8rem;
  }

  .prose-article h2 {
    font-size: 1.4rem;
  }

  .prose-article h3 {
    font-size: 1.1rem;
  }

  .article-excerpt {
    font-size: 1rem;
  }
}

/* Smooth scroll behavior */
.article-container::-webkit-scrollbar {
  width: 8px;
}

.article-container::-webkit-scrollbar-track {
  background: var(--muted);
}

.article-container::-webkit-scrollbar-thumb {
  background: var(--blue);
  border-radius: 4px;
}

.article-container::-webkit-scrollbar-thumb:hover {
  background: var(--blue-dark);
}

/* Keyframe animations */
@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Blog card interactivity */
.blog-card {
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

.blog-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.blog-card .btn-read-more {
  transition: background var(--transition), transform var(--transition), border-color var(--transition);
}

@media (max-width: 768px) {
  .blog-card:hover {
    transform: translateY(-2px);
  }
}