.page-shell {
  padding-bottom: 2rem;
}

.site-nav {
  position: sticky;
  top: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 1rem;
  padding: 0.85rem 1rem;
  border: 1px solid var(--border);
  border-radius: 18px;
  background: var(--nav-bg);
  backdrop-filter: blur(12px);
  box-shadow: none;
}

.navbar-brand img {
  height: 30px;
}

.site-nav .nav-pills {
  display: flex;
  gap: 0.5rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-nav .nav-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.8rem;
  border-radius: 12px;
  color: var(--purple-deep);
  font-weight: 600;
  background: rgba(91, 45, 134, 0.06);
  transition: background-color 0.2s ease, transform 0.2s ease;
}

.site-nav .nav-link:hover {
  background: rgba(91, 45, 134, 0.12);
}

.site-nav .nav-link.active {
  background: #d8d8d8;
  color: var(--purple-deep);
  box-shadow: none;
  transform: none;
}

.site-nav .nav-link img {
  height: 20px;
}

.hero {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 2rem;
  margin-top: 2rem;
  margin-bottom: 2rem;
}

.hero-banner {
  flex: 1 1 360px;
  display: flex;
  justify-content: center;
  padding: 1.5rem 2rem 1rem;
}

.hero-banner img {
  max-width: 500px;
  width: 100%;
}

.hero-copy {
  flex: 1 1 420px;
  font-size: 1.1rem;
  color: var(--ink);
}

.hero-copy p {
  margin-bottom: 0;
  max-width: 650px;
}

.hero-copy a {
  color: #4f9cff;
  text-decoration: underline;
  text-underline-offset: 2px;
}

.hero-copy a:hover {
  color: #8bbdff;
}

.hero-actions {
  margin-top: 1.25rem;
}

.primary-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.25rem;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--purple), var(--orange));
  color: #fff;
  font-weight: 700;
  letter-spacing: 0.02em;
  box-shadow: none;
}

.primary-action:hover {
  color: #fff;
  transform: translateY(-1px);
}

.portfolio-section {
  margin-top: 2.5rem;
}

.portfolio-section h2 {
  margin-bottom: 1.25rem;
  font-size: clamp(1.8rem, 2vw, 2.6rem);
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(220px, 1fr));
  gap: 1.2rem;
  margin-bottom: 1.5rem;
}

.project-card {
  transition: none;
}

.project-card:hover {
  transform: none;
  box-shadow: none;
}

.project-card .card-title {
  color: var(--purple-deep);
}

.social-links {
  display: flex;
  justify-content: center;
  gap: 1rem;
  padding: 1rem 0 0.75rem;
}

.social-links a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 52px;
  height: 52px;
  border-radius: 50%;
  color: var(--purple-deep);
  background: rgba(91, 45, 134, 0.06);
  border: 1px solid var(--border);
  transition: transform 0.2s ease, background 0.2s ease;
}

.social-links a:hover {
  background: rgba(239, 122, 59, 0.12);
  transform: translateY(-2px);
}

.social-links svg {
  width: 26px;
  height: 26px;
}

.bookshelf {
  display: grid;
  grid-template-columns: repeat(5, minmax(120px, 1fr));
  gap: 1.5rem;
  padding: 1.5rem 0 2rem;
  align-items: end;
  position: relative;
}

.bookshelf::before {
  content: none;
}

.book-item {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  min-height: 220px;
  justify-content: end;
}

.book-cover {
  width: 100%;
  max-width: 120px;
  height: 170px;
  object-fit: cover;
  object-position: left center;
  background: #f1e8d7;
  border: none;
  border-radius: 4px 4px 8px 8px;
  box-shadow: none;
}

.book-meta {
  text-align: center;
}

.book-title {
  font-size: 0.9rem;
  margin-bottom: 0.2rem;
  color: var(--purple-deep);
}

.book-author {
  font-size: 0.8rem;
  color: var(--muted);
}

.more-section {
  padding: 0.5rem 0 2rem;
  text-align: center;
}

.more-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 80px;
  height: 80px;
  margin-top: 0.5rem;
  padding: 0;
  border: none;
  border-radius: 12px;
  background: transparent;
  box-shadow: none;
}

.more-button img {
  width: 60px;
  height: auto;
  display: block;
  object-fit: contain;
}

.collapse-message {
  padding-top: 1rem;
  color: var(--muted);
}

@media (max-width: 1024px) {
  .bookshelf {
    grid-template-columns: repeat(3, minmax(120px, 1fr));
  }
}

@media (max-width: 767px) {
  .bookshelf {
    grid-template-columns: repeat(2, minmax(120px, 1fr));
  }
}

@media (max-width: 1024px) {
  .card-grid {
    grid-template-columns: repeat(2, minmax(220px, 1fr));
  }
}

@media (max-width: 767px) {
  .site-nav {
    flex-direction: column;
    gap: 0.8rem;
    align-items: flex-start;
  }

  .site-nav .nav-pills {
    flex-wrap: wrap;
  }

  .hero {
    margin-top: 1.25rem;
  }

  .hero-banner {
    padding-left: 0.5rem;
    padding-right: 0.5rem;
  }

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