/* Blog-only styles — extends site.css design tokens */

.blog-hero {
  padding: clamp(2.5rem, 6vh, 4rem) 0 clamp(1.5rem, 3vh, 2.5rem);
}

.blog-hero h1 {
  max-width: 16ch;
  margin-bottom: 1rem;
}

.blog-hero .lead {
  font-size: clamp(1.05rem, 2vw, 1.2rem);
  max-width: 48ch;
  line-height: 1.65;
  margin-bottom: 1.75rem;
}

.blog-toolbar {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  margin-bottom: 2.5rem;
}

.blog-search {
  position: relative;
  max-width: 420px;
}

.blog-search input {
  width: 100%;
  padding: 0.9rem 1rem 0.9rem 2.75rem;
  border-radius: 14px;
  border: 1px solid var(--border-strong);
  background: rgba(15, 23, 42, 0.7);
  color: var(--text);
  font-family: inherit;
  font-size: 1rem;
}

.blog-search input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.2);
}

.blog-search svg {
  position: absolute;
  left: 1rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  pointer-events: none;
}

.blog-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.blog-filter {
  padding: 0.45rem 0.85rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.03);
  color: var(--text-secondary);
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  font-family: inherit;
  transition:
    border-color 0.2s var(--ease),
    color 0.2s var(--ease),
    background 0.2s var(--ease);
}

.blog-filter:hover,
.blog-filter.is-active {
  border-color: rgba(139, 92, 246, 0.45);
  color: var(--text);
  background: rgba(139, 92, 246, 0.12);
}

.blog-section-label {
  display: block;
  margin-bottom: 1rem;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent-soft);
}

.blog-empty {
  padding: 2rem;
  border-radius: var(--radius-md);
  border: 1px dashed var(--border);
  color: var(--text-muted);
  text-align: center;
}

/* Covers */
.cover {
  display: block;
  width: 100%;
  background-color: #0f172a;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
}

.cover-a {
  background-image: url('/assets/blog/cover-a-youtube-2026.jpg');
}
.cover-b {
  background-image: url('/assets/blog/cover-b-productivity.jpg');
}
.cover-c {
  background-image: url('/assets/blog/cover-c-learning.jpg');
}
.cover-d {
  background-image: url('/assets/blog/cover-d-python.jpg');
}
.cover-e {
  background-image: url('/assets/blog/cover-e-databricks.jpg');
}
.cover-f {
  background-image: url('/assets/blog/cover-f-react.jpg');
}

/* Featured */
.featured-card {
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  gap: 0;
  overflow: hidden;
  margin-bottom: 3rem;
  transition:
    transform 0.35s var(--ease),
    border-color 0.35s var(--ease),
    box-shadow 0.35s var(--ease);
}

.featured-card:hover {
  transform: translateY(-4px);
  border-color: rgba(139, 92, 246, 0.35);
  box-shadow: var(--glow), var(--shadow-soft);
}

.featured-card__media {
  min-height: 280px;
}

.featured-card__body {
  padding: clamp(1.5rem, 3vw, 2.25rem);
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 0.85rem;
}

.featured-card__body h2 {
  font-size: clamp(1.5rem, 3vw, 2rem);
}

.featured-card__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem 1rem;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.blog-cat {
  display: inline-flex;
  padding: 0.25rem 0.65rem;
  border-radius: 999px;
  border: 1px solid rgba(139, 92, 246, 0.35);
  background: rgba(139, 92, 246, 0.1);
  color: var(--accent-soft);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

/* Cards grid */
.blog-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
  margin-bottom: 3rem;
}

.blog-card {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: rgba(30, 41, 59, 0.4);
  backdrop-filter: blur(12px);
  transition:
    transform 0.35s var(--ease),
    border-color 0.35s var(--ease),
    box-shadow 0.35s var(--ease);
}

.blog-card:hover {
  transform: translateY(-6px);
  border-color: rgba(139, 92, 246, 0.35);
  box-shadow: var(--glow), var(--shadow-soft);
}

.blog-card__media {
  aspect-ratio: 16 / 10;
}

.blog-card__body {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  padding: 1.25rem 1.35rem 1.5rem;
  flex: 1;
}

.blog-card__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 0.85rem;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.blog-card h3 {
  font-size: 1.1rem;
  line-height: 1.3;
}

.blog-card h3 a {
  color: var(--text);
}

.blog-card h3 a:hover {
  color: var(--accent-soft);
}

.blog-card p {
  font-size: 0.92rem;
  flex: 1;
}

.blog-card__footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-top: 0.5rem;
  padding-top: 0.85rem;
  border-top: 1px solid var(--border);
}

.blog-card__author {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.blog-card__author strong {
  color: var(--text-secondary);
  font-weight: 600;
}

.popular-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin-bottom: 3rem;
}

.popular-item {
  padding: 1.25rem 1.35rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  background: rgba(30, 41, 59, 0.35);
  transition:
    transform 0.3s var(--ease),
    border-color 0.3s var(--ease);
}

.popular-item:hover {
  transform: translateY(-3px);
  border-color: rgba(139, 92, 246, 0.35);
}

.popular-item h3 {
  font-size: 1rem;
  margin: 0.5rem 0 0.35rem;
}

.popular-item h3 a {
  color: var(--text);
}

.popular-item h3 a:hover {
  color: var(--accent-soft);
}

.popular-item p {
  font-size: 0.85rem;
  margin: 0;
}

/* Article layout */
.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}

.breadcrumbs a {
  color: var(--text-secondary);
}

.breadcrumbs a:hover {
  color: var(--text);
}

.breadcrumbs span[aria-hidden="true"] {
  opacity: 0.5;
}

.article-hero {
  padding: clamp(2rem, 5vh, 3.25rem) 0 1.5rem;
}

.article-hero__cover {
  width: 100%;
  aspect-ratio: 21 / 9;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  margin-bottom: 1.75rem;
  overflow: hidden;
}

.article-hero__cover .cover {
  height: 100%;
}

.article-hero h1 {
  max-width: 18ch;
  margin: 0.75rem 0 0.85rem;
  font-size: clamp(2rem, 4.5vw, 3.25rem);
}

.article-hero .subtitle {
  font-size: 1.15rem;
  max-width: 48ch;
  line-height: 1.65;
  margin-bottom: 1.25rem;
}

.article-byline {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem 1.25rem;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.article-layout {
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  gap: 2.5rem;
  align-items: start;
  padding-bottom: clamp(3rem, 6vh, 4.5rem);
}

.article-toc {
  position: sticky;
  top: calc(var(--nav-h) + 1.25rem);
  padding: 1.15rem 1.25rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  background: rgba(30, 41, 59, 0.45);
  backdrop-filter: blur(12px);
}

.article-toc h2 {
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 0.85rem;
}

.article-toc ol {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.article-toc a {
  color: var(--text-secondary);
  font-size: 0.88rem;
  font-weight: 500;
  line-height: 1.35;
}

.article-toc a:hover,
.article-toc a.is-active {
  color: var(--accent-soft);
}

.article-content {
  max-width: 800px;
}

.article-content h2 {
  font-size: 1.55rem;
  margin: 2.5rem 0 0.9rem;
  scroll-margin-top: calc(var(--nav-h) + 1rem);
}

.article-content h3 {
  font-size: 1.2rem;
  margin: 1.75rem 0 0.65rem;
  scroll-margin-top: calc(var(--nav-h) + 1rem);
}

.article-content p {
  margin: 0 0 1.15em;
  font-size: 1.05rem;
  line-height: 1.8;
  color: var(--text-secondary);
}

.article-content ul,
.article-content ol {
  margin: 0 0 1.25em;
  padding-left: 1.3rem;
  color: var(--text-secondary);
  font-size: 1.05rem;
  line-height: 1.75;
  list-style: disc;
}

.article-content ol {
  list-style: decimal;
}

.article-content li + li {
  margin-top: 0.45em;
}

.article-content strong {
  color: var(--text);
  font-weight: 600;
}

.article-content a {
  text-decoration: underline;
  text-underline-offset: 2px;
}

.callout {
  margin: 1.75rem 0;
  padding: 1.15rem 1.35rem;
  border-radius: var(--radius-md);
  border: 1px solid rgba(139, 92, 246, 0.3);
  background: rgba(139, 92, 246, 0.08);
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.65;
}

.callout strong {
  display: block;
  color: var(--accent-soft);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 0.4rem;
}

.quote-block {
  margin: 2rem 0;
  padding: 1.25rem 1.5rem;
  border-left: 3px solid var(--accent);
  background: rgba(255, 255, 255, 0.03);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: #cbd5e1;
  font-size: 1.15rem;
  line-height: 1.65;
  font-style: italic;
}

.code-block {
  margin: 1.5rem 0;
  padding: 1.15rem 1.25rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: rgba(15, 23, 42, 0.85);
  overflow-x: auto;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.88rem;
  line-height: 1.6;
  color: #e2e8f0;
}

.content-image {
  margin: 1.75rem 0;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  overflow: hidden;
  aspect-ratio: 16 / 9;
}

.article-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin: 3rem 0 2.5rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
}

.article-nav a {
  display: block;
  padding: 1.15rem 1.25rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  background: rgba(30, 41, 59, 0.35);
  color: var(--text);
  transition:
    transform 0.25s var(--ease),
    border-color 0.25s var(--ease);
}

.article-nav a:hover {
  transform: translateY(-2px);
  border-color: rgba(139, 92, 246, 0.35);
  color: var(--text);
}

.article-nav__label {
  display: block;
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 0.35rem;
}

.article-nav__title {
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: -0.02em;
}

.article-nav__next {
  text-align: right;
}

.related {
  margin-bottom: 2rem;
}

.related h2 {
  font-size: 1.5rem;
  margin-bottom: 1.25rem;
}

@media (max-width: 1024px) {
  .blog-grid,
  .popular-list {
    grid-template-columns: repeat(2, 1fr);
  }

  .featured-card {
    grid-template-columns: 1fr;
  }

  .featured-card__media {
    min-height: 200px;
  }

  .article-layout {
    grid-template-columns: 1fr;
  }

  .article-toc {
    position: static;
  }
}

@media (max-width: 700px) {
  .blog-grid,
  .popular-list {
    grid-template-columns: 1fr;
  }

  .article-nav {
    grid-template-columns: 1fr;
  }

  .article-nav__next {
    text-align: left;
  }

  .article-hero h1 {
    max-width: none;
  }
}