.blog-library {
  padding: 3rem 0 5rem;
}

.blog-library__inner {
  max-width: 64rem;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.blog-breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.55rem;
  margin-bottom: 2rem;
  color: var(--color-text-secondary);
  font-size: 0.95rem;
}

.blog-breadcrumbs a {
  color: var(--color-primary);
  text-decoration: none;
}

.blog-breadcrumbs a:hover {
  text-decoration: underline;
  text-underline-offset: 0.2rem;
}

.dark .blog-breadcrumbs a {
  color: var(--color-primary-light);
}

.blog-library__heading {
  margin: 0;
  color: var(--color-text-primary);
  font-size: clamp(2rem, 5vw, 3rem);
  line-height: 1.15;
  text-align: center;
}

.blog-library__intro {
  max-width: 42rem;
  margin: 1.25rem auto 2.75rem;
  color: var(--color-text-secondary);
  font-size: 1.1rem;
  line-height: 1.75;
  text-align: center;
}

.directory-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  max-width: 46rem;
  margin: 0 auto;
  padding: 1.75rem 2rem;
  border: 1px solid var(--color-border);
  border-radius: 1rem;
  background: var(--color-bg-secondary);
  box-shadow: 0 8px 24px var(--color-shadow-lighter);
  color: var(--color-text-primary);
  text-decoration: none;
  transition: transform 180ms ease, box-shadow 180ms ease, border-color 180ms ease;
}

.directory-card:hover {
  transform: translateY(-3px);
  border-color: var(--color-primary);
  box-shadow: 0 14px 30px var(--color-shadow-light);
}

.directory-card__icon {
  flex: 0 0 auto;
  color: var(--color-primary);
  font-size: 2rem;
}

.dark .directory-card__icon {
  color: var(--color-primary-light);
}

.directory-card__content {
  flex: 1;
}

.directory-card__eyebrow {
  display: block;
  margin-bottom: 0.35rem;
  color: var(--color-text-secondary);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.directory-card__title {
  display: block;
  font-size: 1.35rem;
  font-weight: 700;
  line-height: 1.35;
}

.directory-card__arrow {
  flex: 0 0 auto;
  color: var(--color-primary);
  font-size: 1.1rem;
}

.dark .directory-card__arrow {
  color: var(--color-primary-light);
}

.paper-card {
  max-width: 50rem;
  margin: 0 auto;
  padding: clamp(1.5rem, 4vw, 2.5rem);
  border: 1px solid var(--color-border);
  border-radius: 1rem;
  background: var(--color-bg-secondary);
  box-shadow: 0 10px 28px var(--color-shadow-lighter);
}

.paper-card__label {
  margin: 0 0 0.75rem;
  color: var(--color-primary);
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.dark .paper-card__label {
  color: var(--color-primary-light);
}

.paper-card__citation {
  margin: 0;
  color: var(--color-text-primary);
  font-size: 1.08rem;
  line-height: 1.8;
}

.paper-card__citation a {
  color: var(--color-primary);
  font-weight: 650;
  text-decoration: underline;
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.18em;
}

.dark .paper-card__citation a {
  color: var(--color-primary-light);
}

.reading-report-link {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  margin-top: 1.75rem;
  padding: 0.8rem 1.15rem;
  border-radius: 0.7rem;
  background: var(--color-primary);
  color: #fff;
  font-weight: 700;
  text-decoration: none;
  transition: transform 180ms ease, box-shadow 180ms ease, background-color 180ms ease;
}

.reading-report-link:hover {
  transform: translateY(-2px);
  background: var(--color-primary-dark);
  box-shadow: 0 8px 20px var(--color-shadow-light);
}

@media (max-width: 640px) {
  .blog-library {
    padding-top: 2rem;
  }

  .blog-library__inner {
    padding: 0 1rem;
  }

  .directory-card {
    padding: 1.35rem;
  }

  .directory-card__icon {
    font-size: 1.65rem;
  }
}