/* Blog Theme Overview Page Styles
   Styles for blog theme overview pages (ai/index.html, kubernetes/index.html)
*/

main {
  padding: 40px 0;
}

/* ===== PAGE HEADER ===== */

.page-header {
  width: 100%;
  max-width: 800px;
  margin-bottom: 40px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--line-strong);
  opacity: 0;
  animation: fadeUp 0.8s ease-out 0.2s forwards;
}

.page-title {
  font-family: 'Fraunces', serif;
  font-weight: 400;
  font-size: 36px;
  line-height: 1.2;
  color: var(--ink);
  margin-bottom: 8px;
}

.page-subtitle {
  font-size: 14px;
  color: var(--ink-dim);
  font-style: italic;
}

/* ===== BACK LINK ===== */

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-dim);
  text-decoration: none;
  padding: 12px 0;
  transition: color 0.3s ease;
  opacity: 0;
  animation: fadeUp 1s ease-out 0.6s forwards;
}

.back-link:hover {
  color: var(--accent);
}

.back-link .arrow {
  transition: transform 0.3s ease;
}

.back-link:hover .arrow {
  transform: translateX(-4px);
}

/* ===== ARTICLES LIST ===== */

.articles-list {
  width: 100%;
  max-width: 800px;
  display: grid;
  gap: 32px;
  opacity: 0;
  animation: fadeUp 1s ease-out 0.4s forwards;
}

.article-card {
  display: block;
  padding: 32px;
  background: rgba(235, 231, 221, 0.02);
  border: 1px solid var(--line);
  text-decoration: none;
  transition: all 0.4s cubic-bezier(0.7, 0, 0.3, 1);
  position: relative;
  overflow: hidden;
}

.article-card::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--accent);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform 0.4s cubic-bezier(0.7, 0, 0.3, 1);
}

.article-card:hover {
  background: rgba(235, 231, 221, 0.04);
  border-color: var(--accent);
  padding-left: 36px;
}

.article-card:hover::before {
  transform: scaleY(1);
}

.article-card-meta {
  display: flex;
  gap: 12px;
  align-items: center;
  margin-bottom: 16px;
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.article-card-tag {
  color: var(--accent);
  background: rgba(216, 255, 90, 0.1);
  padding: 4px 10px;
  border-radius: 2px;
}

.article-card-date {
  color: var(--ink-dim);
}

.article-card-title {
  font-family: 'Fraunces', serif;
  font-weight: 400;
  font-size: 28px;
  line-height: 1.3;
  color: var(--ink);
  margin-bottom: 12px;
  transition: color 0.3s ease;
}

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

.article-card-excerpt {
  font-size: 15px;
  line-height: 1.7;
  color: var(--ink-dim);
  margin-bottom: 16px;
}

.article-card-link {
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.article-card:hover .article-card-link .arrow {
  transform: translateX(4px);
}

.article-card-link .arrow {
  transition: transform 0.3s ease;
}

/* ===== CERTIFICATION PROGRESS ===== */

.cert-progress {
  width: 100%;
  max-width: 800px;
  border: 1px solid var(--line-strong);
  padding: 24px;
  background: rgba(235, 231, 221, 0.02);
  margin-bottom: 40px;
  opacity: 0;
  animation: fadeUp 1s ease-out 0.3s forwards;
}

.cert-progress-header {
  margin-bottom: 20px;
}

.cert-progress-header h3 {
  font-family: 'Fraunces', serif;
  font-size: 20px;
  font-weight: 400;
  color: var(--ink);
  margin-bottom: 4px;
}

.cert-subtitle {
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-dim);
}

.cert-badges {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 140px), 1fr));
  gap: 16px;
}

.cert-badge {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 16px 12px;
  border: 1px solid var(--line);
  background: rgba(235, 231, 221, 0.02);
  transition: border-color 0.3s ease, background-color 0.3s ease, box-shadow 0.3s ease, opacity 0.3s ease, transform 0.3s ease;
  opacity: 0.3;
}

.cert-badge.earned {
  opacity: 1;
  border-color: var(--accent);
  background: rgba(216, 255, 90, 0.05);
  text-decoration: none;
  color: inherit;
}

.cert-badge.earned:hover {
  transform: translateY(-2px);
  border-color: var(--accent);
  box-shadow: 0 4px 12px rgba(216, 255, 90, 0.15);
}

.badge-logo {
  width: 48px;
  height: 48px;
  object-fit: contain;
  opacity: 0.3;
  filter: grayscale(100%);
  transition: opacity 0.3s ease, filter 0.3s ease;
}

.cert-badge.earned .badge-logo {
  opacity: 1;
  filter: grayscale(0%);
}

.badge-icon {
  font-family: 'JetBrains Mono', monospace;
  font-size: 16px;
  font-weight: 500;
  color: var(--ink-dim);
}

.cert-badge.earned .badge-icon {
  color: var(--accent);
}

.badge-name {
  font-size: 10px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-dim);
  text-align: center;
  line-height: 1.4;
}

.cert-badge.earned .badge-name {
  color: var(--ink);
}

/* ===== RESPONSIVE ===== */

@media (max-width: 720px) {
  .article-card {
    padding: 24px 20px;
  }

  .article-card:hover {
    padding-left: 24px;
  }

  .article-card-title {
    font-size: 22px;
  }

  .cert-badges {
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 12px;
  }

  .cert-badge {
    padding: 12px 8px;
  }

  .cert-progress {
    padding: 16px;
  }
}