/* Blog index (Notion-style) + post pages (Substack-style). Colors via tokens only. */

.blog-index {
  padding-block: clamp(2.5rem, 5vw, 4.5rem) var(--space-section-y);
  background-color: var(--color-bg-page);
}

.blog-index__layout {
  display: grid;
  grid-template-columns: minmax(12rem, 0.28fr) minmax(0, 1fr);
  gap: clamp(1.5rem, 4vw, 3rem);
  align-items: start;
}

.blog-index__sidebar {
  position: sticky;
  top: 5.5rem;
  padding-right: clamp(1rem, 2vw, 1.5rem);
  border-right: 1px solid var(--color-border-subtle);
}

.blog-index__title {
  margin: 0 0 0.75rem;
  font-family: var(--font-family-bold);
  font-size: clamp(2rem, 4vw, 3rem);
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--color-text);
}

.blog-index__subhead {
  margin: 0 0 2rem;
  font-family: var(--font-family-base);
  font-size: 0.95rem;
  line-height: 1.5;
  color: var(--color-text-muted);
  max-width: 22ch;
}

.blog-index__categories {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.blog-index__category-btn {
  appearance: none;
  border: 0;
  background: transparent;
  padding: 0.4rem 0;
  margin: 0;
  text-align: left;
  cursor: pointer;
  font-family: var(--font-family-base);
  font-size: 0.95rem;
  line-height: 1.4;
  color: var(--color-text-muted);
  transition: color var(--duration-button) var(--ease-standard);
}

.blog-index__category-btn:hover,
.blog-index__category-btn:focus-visible {
  color: var(--color-text);
  outline: none;
}

.blog-index__category-btn.is-active {
  font-family: var(--font-family-bold);
  color: var(--color-text);
}

.blog-index__grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(1.5rem, 3vw, 2.5rem) clamp(1.25rem, 2.5vw, 2rem);
}

.blog-index__empty {
  grid-column: 1 / -1;
  margin: 0;
  font-family: var(--font-family-base);
  color: var(--color-text-muted);
}

.blog-index__empty[hidden] {
  display: none;
}

.blog-card {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.blog-card.is-hidden {
  display: none;
}

.blog-card__media-link {
  display: block;
  overflow: hidden;
  border-radius: var(--radius-card);
  aspect-ratio: 16 / 9;
  background-color: var(--color-bg-surface-muted);
}

.blog-card__image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform var(--duration-reveal) var(--ease-standard);
}

.blog-card__media-link:hover .blog-card__image,
.blog-card__media-link:focus-visible .blog-card__image {
  transform: scale(1.03);
}

.blog-card__body {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  padding-top: 1rem;
  flex: 1;
}

.blog-card__category {
  margin: 0;
  font-family: var(--font-family-base);
  font-size: 0.75rem;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--color-text-subtle);
}

.blog-card__title {
  margin: 0;
  font-family: var(--font-family-bold);
  font-size: clamp(1.15rem, 1.5vw, 1.35rem);
  line-height: 1.3;
  color: var(--color-text);
}

.blog-card__title-link {
  color: inherit;
  text-decoration: none;
}

.blog-card__title-link:hover,
.blog-card__title-link:focus-visible {
  color: var(--color-text-accent);
  outline: none;
}

.blog-card__excerpt {
  margin: 0;
  font-family: var(--font-family-base);
  font-size: 0.9rem;
  line-height: 1.55;
  color: var(--color-text-muted);
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.blog-card__author {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  margin-top: auto;
  padding-top: 1rem;
}

.blog-card__avatar,
.blog-post__avatar {
  width: 2.25rem;
  height: 2.25rem;
  border-radius: 50%;
  object-fit: cover;
  background-color: var(--color-bg-surface-muted);
  flex-shrink: 0;
}

.blog-card__author-text,
.blog-post__meta-text {
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
  min-width: 0;
}

.blog-card__author-name,
.blog-post__author-name {
  font-family: var(--font-family-bold);
  font-size: 0.85rem;
  color: var(--color-text);
}

.blog-card__author-role,
.blog-post__meta-sub {
  font-family: var(--font-family-base);
  font-size: 0.75rem;
  color: var(--color-text-subtle);
}

/* ——— Post (Substack-style) ——— */

.blog-post {
  padding-block: clamp(2rem, 4vw, 3.5rem) var(--space-section-y);
  background-color: var(--color-bg-page);
}

/* .mastercontainer is display:flex row globally — stack post chrome vertically */
.blog-post > .mastercontainer,
.blog-index > .mastercontainer {
  flex-direction: column;
  align-items: stretch;
}

.blog-post__header {
  max-width: 42rem;
  margin: 0 auto 2rem;
  text-align: center;
}

.blog-post__category {
  margin: 0 0 0.75rem;
}

.blog-post__category-link {
  font-family: var(--font-family-base);
  font-size: 0.8rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--color-text-accent);
}

.blog-post__category-link:hover,
.blog-post__category-link:focus-visible {
  text-decoration: underline;
  outline: none;
}

.blog-post__title {
  margin: 0 0 0.85rem;
  font-family: var(--font-family-bold);
  font-size: clamp(1.75rem, 3.5vw, 2.75rem);
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--color-text);
}

.blog-post__dek {
  margin: 0 0 1.5rem;
  font-family: var(--font-family-base);
  font-size: 1.05rem;
  line-height: 1.55;
  color: var(--color-text-muted);
}

.blog-post__meta {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  text-align: left;
}

.blog-post__hero {
  margin: 0 auto 2.5rem;
  max-width: 56rem;
}

.blog-post__hero-image {
  width: 100%;
  height: auto;
  display: block;
  border-radius: var(--radius-section);
  aspect-ratio: 16 / 9;
  object-fit: cover;
  background-color: var(--color-bg-surface-muted);
}

.blog-post__layout {
  display: grid;
  grid-template-columns: minmax(10rem, 14rem) minmax(0, 42rem);
  gap: clamp(1.5rem, 3vw, 3rem);
  justify-content: center;
  align-items: start;
}

.blog-post__toc {
  position: sticky;
  top: 5.5rem;
}

.blog-post__toc-label {
  margin: 0 0 0.75rem;
  font-family: var(--font-family-bold);
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-text-subtle);
}

.blog-post__toc-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  border-left: 1px solid var(--color-border-subtle);
}

.blog-post__toc-link {
  display: block;
  padding: 0.25rem 0 0.25rem 0.85rem;
  margin-left: -1px;
  border-left: 2px solid transparent;
  font-family: var(--font-family-base);
  font-size: 0.85rem;
  line-height: 1.4;
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color var(--duration-button) var(--ease-standard), border-color var(--duration-button) var(--ease-standard);
}

.blog-post__toc-link:hover,
.blog-post__toc-link:focus-visible {
  color: var(--color-text);
  outline: none;
}

.blog-post__toc-link.is-active {
  color: var(--color-text);
  border-left-color: var(--color-text-accent);
  font-family: var(--font-family-bold);
}

.blog-post__article {
  max-width: var(--text-prose-max);
}

.blog-post__section + .blog-post__section {
  margin-top: 2.25rem;
}

.blog-post__section-heading {
  margin: 0 0 0.75rem;
  font-family: var(--font-family-bold);
  font-size: clamp(1.2rem, 2vw, 1.5rem);
  line-height: 1.3;
  color: var(--color-text);
  scroll-margin-top: 6rem;
}

.blog-post__intro {
  margin-bottom: 2.25rem;
}

.blog-post__intro p,
.blog-post__section-body p {
  margin: 0 0 1rem;
  font-family: var(--font-family-base);
  font-size: 1rem;
  line-height: 1.7;
  color: var(--color-text-muted);
}

.blog-post__intro p:last-child,
.blog-post__section-body p:last-child {
  margin-bottom: 0;
}

.blog-post__section-body ul,
.blog-post__section-body ol {
  margin: 0 0 1rem;
  padding-left: 1.25rem;
  font-family: var(--font-family-base);
  font-size: 1rem;
  line-height: 1.7;
  color: var(--color-text-muted);
}

.blog-post__section-body li + li {
  margin-top: 0.35rem;
}

.blog-post__section-body strong {
  color: var(--color-text);
  font-family: var(--font-family-bold);
}

.blog-post__back {
  margin: 3rem 0 0;
  padding-top: 1.5rem;
  border-top: 1px solid var(--color-border-subtle);
}

.blog-post__back-link {
  font-family: var(--font-family-base);
  font-size: 0.95rem;
  color: var(--color-text-accent);
  text-decoration: none;
}

.blog-post__back-link:hover,
.blog-post__back-link:focus-visible {
  text-decoration: underline;
  outline: none;
}

@media screen and (max-width: 991px) {
  .blog-index__layout {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .blog-index__sidebar {
    position: static;
    padding-right: 0;
    border-right: 0;
    border-bottom: 1px solid var(--color-border-subtle);
    padding-bottom: 1.5rem;
  }

  .blog-index__subhead {
    max-width: 40ch;
  }

  .blog-index__categories {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 0.5rem 1.25rem;
  }

  .blog-post__layout {
    grid-template-columns: 1fr;
    max-width: 42rem;
    margin-inline: auto;
  }

  .blog-post__toc {
    position: static;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--color-border-subtle);
  }

  .blog-post__toc-list {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 0.5rem 1rem;
    border-left: 0;
  }

  .blog-post__toc-link {
    margin-left: 0;
    padding-left: 0;
    border-left: 0;
    border-bottom: 2px solid transparent;
    padding-bottom: 0.2rem;
  }

  .blog-post__toc-link.is-active {
    border-left-color: transparent;
    border-bottom-color: var(--color-text-accent);
  }
}

@media screen and (max-width: 767px) {
  .blog-index__grid {
    grid-template-columns: 1fr;
  }

  .blog-post__header {
    text-align: left;
  }

  .blog-post__meta {
    width: 100%;
  }
}