/**
 * @file
 * Blog detail page styles — matches design spec.
 */

/* ── Header with warm background ── */
.blog-detail__header-wrap {
  background: var(--color-background-alt);
  padding: 44px var(--page-gutter) 40px;
}

.blog-detail__header {
  max-width: 760px;
  margin: 0 auto;
}

.blog-detail__breadcrumb {
  font-size: 13.5px;
  color: var(--color-text-secondary);
}

.blog-detail__breadcrumb a {
  color: var(--color-primary);
  font-weight: var(--font-weight-bold);
  text-decoration: none;
}

.blog-detail__breadcrumb a:hover {
  text-decoration: underline;
}

.blog-detail__title {
  font-size: 44px;
  line-height: 1.12;
  font-weight: var(--font-weight-bold);
  letter-spacing: -1.6px;
  margin: 18px 0 0;
}

.blog-detail__excerpt {
  font-size: 19px;
  line-height: 1.7;
  color: var(--color-text-secondary);
  margin: 18px 0 0;
}

.blog-detail__author {
  display: flex;
  align-items: center;
  gap: 14px;
  margin: 26px 0 0;
}

.blog-detail__avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--color-background-warm);
  color: var(--color-primary-hover);
  display: grid;
  place-items: center;
  font-size: 14.5px;
  font-weight: var(--font-weight-bold);
  flex: 0 0 44px;
}

.blog-detail__author-name {
  font-size: 14.5px;
  font-weight: var(--font-weight-bold);
}

.blog-detail__author-meta {
  font-size: 13.5px;
  color: var(--color-text-secondary);
}

/* ── Hero image (overlaps header) ── */
.blog-detail__hero {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--page-gutter);
}

.blog-detail__hero-image {
  margin-top: -20px;
  border-radius: 26px;
  overflow: hidden;
  height: 420px;
}

.blog-detail__hero-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ── Content layout ── */
.blog-detail__layout {
  display: grid;
  grid-template-columns: .26fr .74fr;
  gap: 56px;
  align-items: start;
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 48px var(--page-gutter) 60px;
}

/* ── Sidebar TOC ── */
.blog-detail__sidebar {
  position: sticky;
  top: 96px;
}

.blog-detail__toc {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 22px;
  background: var(--color-surface);
}

.blog-detail__toc-title {
  font-size: 12.5px;
  font-weight: var(--font-weight-bold);
  letter-spacing: 1.2px;
  color: var(--color-text-secondary);
}

.blog-detail__toc-list {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.blog-detail__toc-link {
  font-size: 14px;
  color: var(--color-text-secondary);
  cursor: pointer;
  text-decoration: none;
  display: block;
  transition: color var(--transition-fast);
}

.blog-detail__toc-link:hover,
.blog-detail__toc-link.is-active {
  color: var(--color-primary);
  font-weight: var(--font-weight-bold);
}

.blog-detail__toc-share {
  margin: 20px 0 0;
  padding: 18px 0 0;
  border-top: 1px solid var(--color-border);
  display: flex;
  gap: 8px;
}

.blog-detail__share-btn {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--color-border);
  background: none;
  display: grid;
  place-items: center;
  font-size: 14px;
  cursor: pointer;
  color: var(--color-text-secondary);
  transition: all var(--transition-fast);
}

.blog-detail__share-btn:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

/* ── Content area ── */
.blog-detail__content {
  min-width: 0;
  max-width: 720px;
}

.blog-detail__content h2 {
  font-size: 28px;
  font-weight: var(--font-weight-bold);
  letter-spacing: -0.9px;
  margin: 44px 0 0;
}

.blog-detail__content h2:first-child {
  margin-top: 0;
}

.blog-detail__content h3 {
  font-size: 21px;
  font-weight: var(--font-weight-bold);
  margin: 28px 0 0;
}

.blog-detail__content p {
  font-size: 17px;
  line-height: 1.9;
  color: var(--color-text-secondary);
  margin: 14px 0 0;
}

.blog-detail__content ul,
.blog-detail__content ol {
  font-size: 17px;
  line-height: 1.9;
  color: var(--color-text-secondary);
  margin: 14px 0 0;
  padding-left: 24px;
}

.blog-detail__content blockquote {
  border-left: 3px solid var(--color-primary);
  padding: 16px 24px;
  margin: 22px 0;
  background: var(--color-background-alt);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: 17px;
  line-height: 1.9;
  color: var(--color-text-secondary);
}

/* ── Highlight box (warm bg, e.g. CẦN CHUẨN BỊ) ── */
.blog-detail__content .highlight-box {
  margin: 22px 0;
  padding: 24px;
  border-radius: 20px;
  background: var(--color-background-warm);
}

.blog-detail__content .highlight-box__title {
  font-size: 12.5px;
  font-weight: var(--font-weight-bold);
  letter-spacing: 1.2px;
  color: var(--color-primary-hover);
  margin: 0;
}

.blog-detail__content .highlight-box__items {
  margin: 14px 0 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
  font-size: 15.5px;
  line-height: 1.7;
  color: var(--color-text-secondary);
}

.blog-detail__content .highlight-box__item {
  display: flex;
  gap: 10px;
}

.blog-detail__content .highlight-box__check {
  color: var(--color-primary);
  font-weight: var(--font-weight-bold);
  flex-shrink: 0;
}

/* ── Prompt box ── */
.blog-detail__content .prompt-box {
  margin: 22px 0;
  border: 1px solid var(--color-border);
  border-radius: 20px;
  overflow: hidden;
}

.blog-detail__content .prompt-box__header {
  padding: 14px 20px;
  background: var(--color-background);
  border-bottom: 1px solid var(--color-border);
  font-size: 12.5px;
  font-weight: var(--font-weight-bold);
  letter-spacing: 1.2px;
  color: var(--color-text-secondary);
}

.blog-detail__content .prompt-box__body {
  padding: 20px;
  font-family: monospace;
  font-size: 14px;
  line-height: 1.8;
  color: var(--color-text-primary);
}

/* ── Dark quote box ── */
.blog-detail__content .quote-box {
  margin: 26px 0;
  padding: 28px;
  border-radius: 22px;
  background: var(--color-surface-dark);
  color: var(--color-text-inverse);
}

.blog-detail__content .quote-box p {
  margin: 0;
  font-size: 21px;
  line-height: 1.55;
  font-weight: var(--font-weight-bold);
  letter-spacing: -0.5px;
  color: var(--color-text-inverse);
}

/* ── Image grid ── */
.blog-detail__content .image-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin: 22px 0;
}

.blog-detail__content .image-grid__item {
  height: 150px;
  border-radius: 16px;
  overflow: hidden;
}

.blog-detail__content .image-grid img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.blog-detail__content .image-grid__caption {
  grid-column: 1 / -1;
  font-size: 13.5px;
  color: var(--color-text-secondary);
  margin: 0;
}

/* ── Summary grid (4-col table) ── */
.blog-detail__content .summary-grid {
  margin: 18px 0;
  border: 1px solid var(--color-border);
  border-radius: 20px;
  overflow: hidden;
}

.blog-detail__content .summary-grid__row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--color-border);
}

.blog-detail__content .summary-grid__cell {
  background: var(--color-surface);
  padding: 18px;
}

.blog-detail__content .summary-grid__label {
  font-size: 13px;
  color: var(--color-text-secondary);
}

.blog-detail__content .summary-grid__value {
  margin: 6px 0 0;
  font-size: 15px;
  font-weight: var(--font-weight-bold);
}

/* ── Resource CTA box ── */
.blog-detail__content .resource-box {
  margin: 40px 0 0;
  padding: 30px;
  border-radius: 24px;
  background: var(--color-background-alt);
  display: flex;
  gap: 24px;
  align-items: center;
}

.blog-detail__content .resource-box__info {
  flex: 1;
}

.blog-detail__content .resource-box__eyebrow {
  font-size: 12.5px;
  font-weight: var(--font-weight-bold);
  letter-spacing: 1.2px;
  color: var(--color-primary-hover);
}

.blog-detail__content .resource-box__title {
  margin: 10px 0 0;
  font-size: 19px;
  font-weight: var(--font-weight-bold);
  letter-spacing: -0.4px;
}

.blog-detail__content .resource-box__desc {
  margin: 8px 0 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--color-text-secondary);
}

.blog-detail__content .resource-box__form {
  flex: 0 0 300px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.blog-detail__content .resource-box__input {
  padding: 14px 16px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  background: var(--color-surface);
  font-size: 14.5px;
  color: var(--color-text-muted);
}

.blog-detail__content .resource-box__submit {
  padding: 14px;
  border-radius: var(--radius-pill);
  border: none;
  background: var(--color-primary);
  color: var(--color-text-inverse);
  font-size: 15px;
  font-weight: var(--font-weight-bold);
  cursor: pointer;
  transition: background var(--transition-base);
}

.blog-detail__content .resource-box__submit:hover {
  background: var(--color-primary-hover);
}

/* ── Previous / Next nav ── */
.blog-detail__nav {
  margin: 40px 0 0;
  padding: 34px 0 0;
  border-top: 1px solid var(--color-border);
  display: flex;
  gap: 16px;
}

.blog-detail__nav-item {
  flex: 1;
  border: 1px solid var(--color-border);
  border-radius: 18px;
  padding: 20px;
  text-decoration: none;
  color: inherit;
  transition: box-shadow var(--transition-base);
}

.blog-detail__nav-item:hover {
  box-shadow: var(--shadow-sm);
}

.blog-detail__nav-item--next {
  text-align: right;
}

.blog-detail__nav-label {
  font-size: 12.5px;
  color: var(--color-text-secondary);
  display: block;
}

.blog-detail__nav-title {
  font-size: 16px;
  line-height: 1.35;
  font-weight: var(--font-weight-bold);
  margin: 8px 0 0;
  display: block;
}

/* ── Bottom CTA Banner ── */
.blog-detail__cta {
  padding: 20px var(--page-gutter) 80px;
}

.blog-detail__cta-inner {
  max-width: var(--container-max-width);
  margin: 0 auto;
  background: var(--color-surface-dark);
  color: var(--color-text-inverse);
  border-radius: var(--radius-3xl);
  padding: 56px;
  display: grid;
  grid-template-columns: 1.2fr .8fr;
  gap: 40px;
  align-items: center;
}

.blog-detail__cta-title {
  font-size: 32px;
  line-height: 1.2;
  font-weight: var(--font-weight-bold);
  letter-spacing: -1.1px;
  margin: 0;
  color: var(--color-text-inverse);
}

.blog-detail__cta-desc {
  font-size: 16.5px;
  line-height: 1.75;
  color: rgba(255, 255, 255, .68);
  margin: 14px 0 0;
}

.blog-detail__cta-btn {
  justify-self: end;
  padding: 17px 32px;
  border-radius: var(--radius-pill);
  background: var(--color-accent);
  color: var(--color-surface-dark);
  font-size: 16px;
  font-weight: var(--font-weight-bold);
  text-decoration: none;
  display: inline-block;
  transition: background var(--transition-base);
}

.blog-detail__cta-btn:hover {
  background: var(--color-accent-medium);
}

/* ── Responsive ── */
@media (max-width: 768px) {
  .blog-detail__header-wrap {
    padding: 28px var(--page-gutter-mobile) 32px;
  }

  .blog-detail__title {
    font-size: 28px;
    letter-spacing: -1px;
  }

  .blog-detail__excerpt {
    font-size: 16px;
  }

  .blog-detail__author {
    gap: 12px;
    margin: 16px 0 0;
  }

  .blog-detail__hero {
    padding: 0 var(--page-gutter-mobile);
  }

  .blog-detail__hero-image {
    height: 220px;
    border-radius: 18px;
  }

  .blog-detail__layout {
    grid-template-columns: 1fr;
    gap: 0;
    padding: 24px var(--page-gutter-mobile) 40px;
  }

  .blog-detail__sidebar {
    display: none;
  }

  .blog-detail__content h2 {
    font-size: 22px;
    margin-top: 32px;
  }

  .blog-detail__content p {
    font-size: 15px;
  }

  .blog-detail__nav {
    flex-direction: column;
  }

  .blog-detail__nav-item--next {
    text-align: left;
  }

  .blog-detail__cta {
    padding: 20px var(--page-gutter-mobile) 60px;
  }

  .blog-detail__cta-inner {
    grid-template-columns: 1fr;
    padding: 32px 24px;
    text-align: center;
  }

  .blog-detail__cta-btn {
    justify-self: center;
  }

  .blog-detail__content .image-grid {
    grid-template-columns: 1fr;
  }

  .blog-detail__content .image-grid__item {
    height: 200px;
  }

  .blog-detail__content .summary-grid__row {
    grid-template-columns: repeat(2, 1fr);
  }

  .blog-detail__content .resource-box {
    flex-direction: column;
  }

  .blog-detail__content .resource-box__form {
    flex: none;
    width: 100%;
  }

  .blog-detail__content .quote-box p {
    font-size: 18px;
  }
}