/* ============================================================
   BooksByMax Designs — Main Site Styles
   Phase 1: Foundation & Brand Identity
   ============================================================ */

/* Import design system */
@import url('./design-system.css');


/* ============================================================
   NAVIGATION
   ============================================================ */
.site-nav {
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  height: var(--nav-height);
  transition: box-shadow var(--transition-base);
}

.site-nav.scrolled {
  box-shadow: var(--shadow-md);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  gap: var(--space-6);
}

/* Brand logo area */
.nav-brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  flex-shrink: 0;
}

.nav-brand-icon {
  width: 40px;
  height: 40px;
  background: var(--color-primary-700);
  border-radius: var(--radius-xl);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: var(--text-xl);
  font-weight: var(--font-black);
  font-family: var(--font-display);
  flex-shrink: 0;
}

.nav-brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.nav-brand-name {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: var(--font-bold);
  color: var(--color-primary-800);
  letter-spacing: var(--tracking-tight);
}

.nav-brand-sub {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: var(--font-medium);
  color: var(--color-text-muted);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
}

/* Desktop nav links */
.nav-links {
  display: none;
  align-items: center;
  gap: var(--space-1);
}

@media (min-width: 768px) {
  .nav-links {
    display: flex;
  }
}

.nav-link {
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  color: var(--color-text-secondary);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-lg);
  transition: all var(--transition-fast);
  text-decoration: none;
  white-space: nowrap;
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-primary-700);
  background: var(--color-primary-50);
}

.nav-link.active {
  font-weight: var(--font-bold);
}

/* Nav CTA */
.nav-cta {
  display: none;
  flex-shrink: 0;
}

@media (min-width: 640px) {
  .nav-cta {
    display: flex;
  }
}

/* Hamburger menu */
.nav-hamburger {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  padding: var(--space-1);
  cursor: pointer;
  border-radius: var(--radius-lg);
  transition: background var(--transition-fast);
  flex-shrink: 0;
}

@media (min-width: 768px) {
  .nav-hamburger {
    display: none;
  }
}

.nav-hamburger:hover {
  background: var(--color-neutral-100);
}

.nav-hamburger span {
  display: block;
  height: 2px;
  background: var(--color-text-primary);
  border-radius: var(--radius-full);
  transition: all var(--transition-base);
}

.nav-hamburger.open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-hamburger.open span:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

.nav-hamburger.open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile menu */
.nav-mobile-menu {
  display: none;
  position: fixed;
  top: var(--nav-height);
  left: 0;
  right: 0;
  background: white;
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow-xl);
  z-index: calc(var(--z-sticky) - 1);
  padding: var(--space-4) var(--space-4) var(--space-6);
}

.nav-mobile-menu.open {
  display: block;
}

.nav-mobile-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  margin-bottom: var(--space-4);
}

.nav-mobile-link {
  font-size: var(--text-base);
  font-weight: var(--font-semibold);
  color: var(--color-text-secondary);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-xl);
  transition: all var(--transition-fast);
  text-decoration: none;
  display: block;
}

.nav-mobile-link:hover {
  color: var(--color-primary-700);
  background: var(--color-primary-50);
}


/* ============================================================
   HERO SECTION
   ============================================================ */
.hero {
  background: linear-gradient(
    135deg,
    var(--color-primary-900) 0%,
    var(--color-primary-700) 50%,
    var(--color-primary-600) 100%
  );
  color: white;
  padding-block: var(--space-24) var(--space-28);
  position: relative;
  overflow: hidden;
}

/* Decorative background shapes */
.hero::before {
  content: '';
  position: absolute;
  top: -80px;
  right: -80px;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(245, 158, 11, 0.15) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -100px;
  left: -60px;
  width: 350px;
  height: 350px;
  background: radial-gradient(circle, rgba(59, 107, 200, 0.2) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-12);
  align-items: center;
}

@media (min-width: 1024px) {
  .hero-inner {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-16);
  }
}

.hero-content {
  text-align: center;
}

@media (min-width: 1024px) {
  .hero-content {
    text-align: left;
  }
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-accent);
  font-size: var(--text-xl);
  font-weight: var(--font-semibold);
  color: var(--color-accent-300);
  margin-bottom: var(--space-4);
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(var(--text-4xl), 6vw, var(--text-7xl));
  font-weight: var(--font-black);
  line-height: var(--leading-none);
  color: white;
  margin-bottom: var(--space-6);
  letter-spacing: var(--tracking-tight);
}

.hero-title-accent {
  color: var(--color-accent-400);
  display: block;
}

.hero-subtitle {
  font-size: clamp(var(--text-base), 2vw, var(--text-xl));
  color: rgba(255, 255, 255, 0.8);
  line-height: var(--leading-relaxed);
  max-width: 520px;
  margin-bottom: var(--space-8);
}

@media (min-width: 1024px) {
  .hero-subtitle {
    margin-inline: 0;
  }
}

@media (max-width: 1023px) {
  .hero-subtitle {
    margin-inline: auto;
  }
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  justify-content: center;
}

@media (min-width: 1024px) {
  .hero-actions {
    justify-content: flex-start;
  }
}

.hero-stats {
  display: flex;
  gap: var(--space-8);
  margin-top: var(--space-10);
  justify-content: center;
  flex-wrap: wrap;
}

@media (min-width: 1024px) {
  .hero-stats {
    justify-content: flex-start;
  }
}

.hero-stat {
  text-align: center;
}

@media (min-width: 1024px) {
  .hero-stat {
    text-align: left;
  }
}

.hero-stat-number {
  display: block;
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: var(--font-bold);
  color: var(--color-accent-300);
  line-height: 1;
}

.hero-stat-label {
  display: block;
  font-size: var(--text-sm);
  color: rgba(255, 255, 255, 0.65);
  margin-top: var(--space-1);
}

/* Hero book showcase */
.hero-visual {
  display: none;
}

@media (min-width: 1024px) {
  .hero-visual {
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
  }
}

.hero-books-stack {
  position: relative;
  width: 340px;
  height: 380px;
}

.hero-book {
  position: absolute;
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-2xl);
  transition: transform var(--transition-slow);
}

.hero-book img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-book--1 {
  width: 180px;
  height: 240px;
  top: 20px;
  left: 20px;
  transform: rotate(-6deg);
  z-index: 1;
}

.hero-book--2 {
  width: 180px;
  height: 240px;
  top: 60px;
  left: 100px;
  transform: rotate(2deg);
  z-index: 2;
}

.hero-book--3 {
  width: 160px;
  height: 210px;
  top: 110px;
  left: 170px;
  transform: rotate(8deg);
  z-index: 3;
}

.hero-books-stack:hover .hero-book--1 { transform: rotate(-8deg) translateY(-8px); }
.hero-books-stack:hover .hero-book--2 { transform: rotate(0deg) translateY(-12px); }
.hero-books-stack:hover .hero-book--3 { transform: rotate(6deg) translateY(-6px); }

/* Category pills in hero */
.hero-categories {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-6);
  justify-content: center;
}

@media (min-width: 1024px) {
  .hero-categories {
    justify-content: flex-start;
  }
}

.hero-category-pill {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1-5);
  padding: var(--space-1-5) var(--space-3);
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  color: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(4px);
}


/* ============================================================
   FEATURED BOOKS SECTION
   ============================================================ */
.featured-section {
  background: var(--color-bg-page);
}

.featured-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
}

@media (min-width: 640px) {
  .featured-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .featured-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* Featured card */
.featured-card {
  background: var(--color-bg-surface);
  border-radius: var(--radius-3xl);
  padding: var(--space-6);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--color-border);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.featured-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--color-primary-500), var(--color-accent-400));
  opacity: 0;
  transition: opacity var(--transition-base);
}

.featured-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
  border-color: var(--color-primary-200);
}

.featured-card:hover::before {
  opacity: 1;
}

.featured-card-badge {
  position: absolute;
  top: var(--space-4);
  right: var(--space-4);
}

/* Book cover image container */
.book-cover-wrap {
  width: var(--featured-cover-w);
  height: var(--featured-cover-h);
  border-radius: var(--radius-xl);
  overflow: hidden;
  margin-bottom: var(--space-5);
  background: var(--color-neutral-100);
  box-shadow: var(--shadow-lg);
  position: relative;
  flex-shrink: 0;
}

.book-cover-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.featured-card:hover .book-cover-wrap img {
  transform: scale(1.04);
}

/* Placeholder for missing covers */
.book-cover-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--color-primary-100), var(--color-primary-50));
  color: var(--color-primary-400);
  font-size: var(--text-4xl);
  gap: var(--space-2);
}

.book-cover-placeholder span {
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  color: var(--color-primary-400);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wider);
}

.featured-card-title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: var(--font-bold);
  color: var(--color-text-primary);
  margin-bottom: var(--space-2);
  line-height: var(--leading-snug);
}

.featured-card-desc {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-4);
  line-height: var(--leading-relaxed);
}

.featured-card-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  justify-content: center;
  margin-bottom: var(--space-5);
}

.meta-tag {
  display: inline-flex;
  align-items: center;
  padding: var(--space-1) var(--space-2-5);
  background: var(--color-neutral-100);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  color: var(--color-text-secondary);
}

.featured-card-actions {
  margin-top: auto;
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}


/* ============================================================
   CATEGORY SECTIONS
   ============================================================ */
.category-section {
  padding-block: var(--space-20);
}

.category-section:nth-child(even) {
  background: var(--color-neutral-50);
}

.category-header {
  display: flex;
  align-items: flex-start;
  gap: var(--space-5);
  margin-bottom: var(--space-10);
  padding-bottom: var(--space-6);
  border-bottom: 2px solid var(--color-border);
}

.category-icon-wrap {
  width: 64px;
  height: 64px;
  border-radius: var(--radius-2xl);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-3xl);
  flex-shrink: 0;
}

.category-header-text {
  flex: 1;
}

.category-label {
  font-family: var(--font-accent);
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  text-transform: uppercase;
  letter-spacing: var(--tracking-widest);
  margin-bottom: var(--space-1);
  display: block;
}

.category-name {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: var(--font-bold);
  line-height: var(--leading-tight);
  margin-bottom: var(--space-2);
}

.category-desc {
  font-size: var(--text-base);
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
  max-width: 600px;
}

.category-count {
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  color: var(--color-text-muted);
  margin-top: var(--space-2);
}

/* Category color themes */
.category-section--coloring .category-icon-wrap {
  background: var(--color-cat-coloring-light);
  color: var(--color-cat-coloring-dark);
}
.category-section--coloring .category-label {
  color: var(--color-cat-coloring-dark);
}
.category-section--coloring .category-name {
  color: var(--color-cat-coloring-dark);
}
.category-section--coloring .category-header {
  border-color: var(--color-cat-coloring-border);
}
.category-section--coloring .book-card:hover {
  border-color: var(--color-cat-coloring);
}

.category-section--journals .category-icon-wrap {
  background: var(--color-cat-journals-light);
  color: var(--color-cat-journals-dark);
}
.category-section--journals .category-label {
  color: var(--color-cat-journals-dark);
}
.category-section--journals .category-name {
  color: var(--color-cat-journals-dark);
}
.category-section--journals .category-header {
  border-color: var(--color-cat-journals-border);
}
.category-section--journals .book-card:hover {
  border-color: var(--color-cat-journals);
}

.category-section--cookbooks .category-icon-wrap {
  background: var(--color-cat-cookbooks-light);
  color: var(--color-cat-cookbooks-dark);
}
.category-section--cookbooks .category-label {
  color: var(--color-cat-cookbooks-dark);
}
.category-section--cookbooks .category-name {
  color: var(--color-cat-cookbooks-dark);
}
.category-section--cookbooks .category-header {
  border-color: var(--color-cat-cookbooks-border);
}
.category-section--cookbooks .book-card:hover {
  border-color: var(--color-cat-cookbooks);
}

/* Books grid */
.books-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-4);
}

@media (min-width: 640px) {
  .books-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-5);
  }
}

@media (min-width: 1024px) {
  .books-grid {
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-6);
  }
}

/* Book card */
.book-card {
  background: var(--color-bg-surface);
  border-radius: var(--radius-2xl);
  padding: var(--space-4);
  text-align: center;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
  transition: all var(--transition-base);
  display: flex;
  flex-direction: column;
  align-items: center;
}

.book-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.book-card-cover {
  width: var(--book-cover-w);
  height: var(--book-cover-h);
  border-radius: var(--radius-xl);
  overflow: hidden;
  margin-bottom: var(--space-3);
  background: var(--color-neutral-100);
  box-shadow: var(--shadow-md);
  position: relative;
  flex-shrink: 0;
}

.book-card-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.book-card:hover .book-card-cover img {
  transform: scale(1.05);
}

.book-card-title {
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-weight: var(--font-bold);
  color: var(--color-text-primary);
  margin-bottom: var(--space-1-5);
  line-height: var(--leading-snug);
}

.book-card-meta {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  margin-bottom: var(--space-3);
}

.book-card-actions {
  margin-top: auto;
  width: 100%;
}


/* ============================================================
   ABOUT / AUTHOR SECTION
   ============================================================ */
.about-section {
  background: linear-gradient(
    135deg,
    var(--color-primary-900) 0%,
    var(--color-primary-800) 100%
  );
  color: white;
  position: relative;
  overflow: hidden;
}

.about-section::before {
  content: '';
  position: absolute;
  top: -120px;
  right: -80px;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(245, 158, 11, 0.1) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.about-inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-12);
  align-items: center;
  position: relative;
  z-index: 1;
}

@media (min-width: 1024px) {
  .about-inner {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-16);
  }
}

.about-visual {
  display: flex;
  justify-content: center;
}

.about-avatar-wrap {
  position: relative;
  width: 240px;
  height: 240px;
}

.about-avatar {
  width: 240px;
  height: 240px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primary-600), var(--color-primary-400));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 5rem;
  border: 4px solid rgba(255, 255, 255, 0.2);
  box-shadow: var(--shadow-2xl);
  overflow: hidden;
}

.about-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.about-avatar-badge {
  position: absolute;
  bottom: 10px;
  right: -25px;
  background: var(--color-accent-500);
  color: var(--color-neutral-900);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: var(--font-bold);
  box-shadow: var(--shadow-lg);
  white-space: nowrap;
}

.about-content-eyebrow {
  font-family: var(--font-accent);
  font-size: var(--text-xl);
  font-weight: var(--font-semibold);
  color: var(--color-accent-300);
  display: block;
  margin-bottom: var(--space-3);
}

.about-content-title {
  font-family: var(--font-display);
  font-size: clamp(var(--text-3xl), 4vw, var(--text-5xl));
  font-weight: var(--font-bold);
  color: white;
  line-height: var(--leading-tight);
  margin-bottom: var(--space-6);
  text-align: center;
}

.about-content-body {
  font-size: var(--text-lg);
  color: rgba(255, 255, 255, 0.8);
  line-height: var(--leading-relaxed);
  margin-bottom: var(--space-6);
  text-align: center;
}

.about-content-body p + p {
  margin-top: var(--space-4);
}

.about-highlights {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-4);
  margin-bottom: var(--space-8);
}

.about-highlight {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-2xl);
  padding: var(--space-4);
}

.about-highlight-number {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: var(--font-bold);
  color: var(--color-accent-300);
  display: block;
  line-height: 1;
}

.about-highlight-label {
  font-size: var(--text-sm);
  color: rgba(255, 255, 255, 0.65);
  margin-top: var(--space-1);
  display: block;
}

.about-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
}


/* ============================================================
   NEWSLETTER / CTA BANNER
   ============================================================ */
.cta-banner {
  background: linear-gradient(
    135deg,
    var(--color-accent-500) 0%,
    var(--color-accent-600) 100%
  );
  padding-block: var(--space-16);
  text-align: center;
}

.cta-banner-eyebrow {
  font-family: var(--font-accent);
  font-size: var(--text-xl);
  font-weight: var(--font-semibold);
  color: rgba(0, 0, 0, 0.6);
  display: block;
  margin-bottom: var(--space-2);
}

.cta-banner-title {
  font-family: var(--font-display);
  font-size: clamp(var(--text-3xl), 4vw, var(--text-5xl));
  font-weight: var(--font-bold);
  color: var(--color-neutral-900);
  margin-bottom: var(--space-4);
  line-height: var(--leading-tight);
}

.cta-banner-subtitle {
  font-size: var(--text-lg);
  color: rgba(0, 0, 0, 0.65);
  max-width: 500px;
  margin-inline: auto;
  margin-bottom: var(--space-8);
  line-height: var(--leading-relaxed);
}

.cta-form {
  display: flex;
  gap: var(--space-3);
  max-width: 480px;
  margin-inline: auto;
  flex-wrap: wrap;
  justify-content: center;
}

.cta-form-input {
  flex: 1;
  min-width: 220px;
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-full);
  border: 2px solid rgba(0, 0, 0, 0.15);
  background: white;
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text-primary);
  outline: none;
  transition: border-color var(--transition-fast);
}

.cta-form-input:focus {
  border-color: var(--color-primary-600);
}

.cta-form-input::placeholder {
  color: var(--color-text-muted);
}

.cta-form-note {
  display: block;
  font-size: var(--text-xs);
  color: rgba(0, 0, 0, 0.5);
  margin-top: var(--space-3);
  text-align: center;
}


/* ============================================================
   FOOTER
   ============================================================ */
.site-footer {
  background: var(--color-primary-900);
  color: rgba(255, 255, 255, 0.75);
  padding-block: var(--space-16) var(--space-8);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-10);
  margin-bottom: var(--space-12);
}

@media (min-width: 640px) {
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .footer-grid {
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--space-8);
  }
}

/* Footer brand column */
.footer-brand {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.footer-brand-name {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: var(--font-bold);
  color: white;
  line-height: 1.1;
}

.footer-brand-sub {
  font-size: var(--text-sm);
  color: var(--color-accent-300);
  font-weight: var(--font-medium);
  letter-spacing: var(--tracking-wide);
}

.footer-brand-desc {
  font-size: var(--text-sm);
  line-height: var(--leading-relaxed);
  color: rgba(255, 255, 255, 0.6);
  max-width: 280px;
}

.footer-social {
  display: flex;
  gap: var(--space-3);
  margin-top: var(--space-2);
}

.footer-social-link {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.12);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-sm);
  color: rgba(255, 255, 255, 0.7);
  transition: all var(--transition-fast);
  text-decoration: none;
}

.footer-social-link:hover {
  background: rgba(255, 255, 255, 0.15);
  color: white;
  border-color: rgba(255, 255, 255, 0.3);
}

/* Footer nav columns */
.footer-col-title {
  font-size: var(--text-sm);
  font-weight: var(--font-bold);
  color: white;
  text-transform: uppercase;
  letter-spacing: var(--tracking-wider);
  margin-bottom: var(--space-4);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-2-5);
}

.footer-link {
  font-size: var(--text-sm);
  color: rgba(255, 255, 255, 0.6);
  text-decoration: none;
  transition: color var(--transition-fast);
  display: inline-block;
}

.footer-link:hover {
  color: white;
}

/* Footer bottom bar */
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  align-items: center;
  text-align: center;
}

@media (min-width: 768px) {
  .footer-bottom {
    flex-direction: row;
    justify-content: space-between;
    text-align: left;
  }
}

.footer-copyright {
  font-size: var(--text-sm);
  color: rgba(255, 255, 255, 0.45);
}

.footer-legal-links {
  display: flex;
  gap: var(--space-4);
}

.footer-legal-link {
  font-size: var(--text-xs);
  color: rgba(255, 255, 255, 0.4);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.footer-legal-link:hover {
  color: rgba(255, 255, 255, 0.75);
}

.footer-amazon-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  color: rgba(255, 255, 255, 0.4);
}


/* ============================================================
   SCROLL ANIMATIONS (progressive enhancement)
   ============================================================ */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

.fade-in-delay-1 { transition-delay: 100ms; }
.fade-in-delay-2 { transition-delay: 200ms; }
.fade-in-delay-3 { transition-delay: 300ms; }
.fade-in-delay-4 { transition-delay: 400ms; }


/* ============================================================
   RESPONSIVE OVERRIDES
   ============================================================ */

/* Mobile: tighten spacing */
@media (max-width: 639px) {
  .section {
    padding-block: var(--space-14);
  }

  .section-title {
    font-size: var(--text-3xl);
  }

  .hero {
    padding-block: var(--space-16) var(--space-20);
  }

  .hero-stats {
    gap: var(--space-6);
  }

  .about-highlights {
    grid-template-columns: 1fr 1fr;
  }

  .book-card-cover {
    width: 120px;
    height: 158px;
  }

  --book-cover-w: 120px;
  --book-cover-h: 158px;
}

/* Tablet adjustments */
@media (min-width: 640px) and (max-width: 1023px) {
  .hero-title {
    font-size: var(--text-5xl);
  }

  .about-highlights {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* Large desktop */
@media (min-width: 1280px) {
  .books-grid {
    grid-template-columns: repeat(5, 1fr);
  }
}

/* Print styles */
@media print {
  .site-nav,
  .hero-visual,
  .cta-banner,
  .site-footer {
    display: none;
  }

  body {
    background: white;
    color: black;
  }
}


/* ============================================================
   PHASE 2: BOOK DATA ENGINE — Additional Styles
   ============================================================ */

/* ------------------------------------------------------------
   Loading State (shown while books.json is fetching)
   ------------------------------------------------------------ */
.books-loading {
  grid-column: 1 / -1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
  padding: var(--space-16);
  color: var(--color-text-muted);
  font-size: var(--text-base);
}

.books-loading-spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--color-border);
  border-top-color: var(--color-primary-500);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}


/* ------------------------------------------------------------
   Featured Card — Secondary Marketplace Links Row
   ------------------------------------------------------------ */
.featured-card-secondary-links {
  display: flex;
  gap: var(--space-2);
  justify-content: center;
  flex-wrap: wrap;
  margin-top: var(--space-2);
}

.featured-card-secondary-links .btn {
  flex: 1;
  min-width: 60px;
  font-size: var(--text-xs);
  padding: var(--space-1-5) var(--space-2);
}


/* ------------------------------------------------------------
   Badge Variants (dynamically generated from featured_badge)
   ------------------------------------------------------------ */
.badge--best-seller,
.badge--bestseller {
  background: var(--color-accent-500);
  color: var(--color-neutral-900);
}

.badge--popular {
  background: var(--color-cat-journals);
  color: white;
}

.badge--trending {
  background: var(--color-cat-coloring);
  color: white;
}

.badge--new {
  background: var(--color-cat-journals);
  color: white;
}

.badge--sale {
  background: #ef4444;
  color: white;
}

.badge--staff-pick {
  background: var(--color-primary-600);
  color: white;
}


/* ------------------------------------------------------------
   Dynamic Category Section Color Themes
   (auto-generated categories beyond the 3 hardcoded ones)
   ------------------------------------------------------------ */

/* Fallback theme for any new category not explicitly styled */
.category-section:not(.category-section--coloring):not(.category-section--journals):not(.category-section--cookbooks) .category-icon-wrap {
  background: var(--color-primary-100);
  color: var(--color-primary-700);
}

.category-section:not(.category-section--coloring):not(.category-section--journals):not(.category-section--cookbooks) .category-label {
  color: var(--color-primary-700);
}

.category-section:not(.category-section--coloring):not(.category-section--journals):not(.category-section--cookbooks) .category-name {
  color: var(--color-primary-800);
}

.category-section:not(.category-section--coloring):not(.category-section--journals):not(.category-section--cookbooks) .category-header {
  border-color: var(--color-primary-200);
}

/* Alternating section backgrounds for auto-generated categories */
.category-section:nth-child(odd) {
  background: var(--color-bg-page);
}

.category-section:nth-child(even) {
  background: var(--color-neutral-50);
}


/* ------------------------------------------------------------
   Book Card — Cover image error fallback
   ------------------------------------------------------------ */
.book-card-cover img[src=""],
.book-card-cover img:not([src]) {
  display: none;
}

/* Ensure placeholder fills cover area properly */
.book-card-cover .book-cover-placeholder,
.book-cover-wrap .book-cover-placeholder {
  width: 100%;
  height: 100%;
  min-height: 100%;
}


/* ============================================================
   PHASE 3: BOOK CARDS & VISUAL POLISH
   ============================================================ */

/* ------------------------------------------------------------
   Book Card — Star Ratings
   ------------------------------------------------------------ */
.book-card-rating {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  justify-content: center;
  margin-bottom: var(--space-2);
  font-size: var(--text-sm);
}

.book-card-stars {
  color: var(--color-accent-500);
  font-size: var(--text-base);
  letter-spacing: -1px;
}

.book-card-rating-num {
  font-weight: var(--font-bold);
  color: var(--color-text-primary);
}

.book-card-reviews {
  color: var(--color-text-muted);
  font-size: var(--text-xs);
}

/* Featured card rating styling */
.featured-card .meta-tag .book-card-stars,
.featured-card-meta .meta-tag {
  font-size: var(--text-xs);
}

/* ------------------------------------------------------------
   Book Card — Price Display
   ------------------------------------------------------------ */
.book-card-price {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: var(--font-bold);
  color: var(--color-primary-700);
  margin-bottom: var(--space-3);
}

/* ------------------------------------------------------------
   Book Card — Marketplace Flag Links
   ------------------------------------------------------------ */
.book-card-marketplaces {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  margin-top: var(--space-2);
}

.marketplace-flag {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: var(--radius-lg);
  background: var(--color-neutral-100);
  border: 1px solid var(--color-border);
  font-size: var(--text-base);
  text-decoration: none;
  transition: all var(--transition-fast);
}

.marketplace-flag:hover {
  background: var(--color-primary-50);
  border-color: var(--color-primary-300);
  transform: scale(1.15);
  box-shadow: var(--shadow-md);
}

/* ------------------------------------------------------------
   Enhanced Book Card — 3D Tilt Hover Effect
   ------------------------------------------------------------ */
.book-card {
  perspective: 800px;
}

.book-card:hover {
  transform: translateY(-5px) rotateX(2deg);
}

.book-card-cover {
  transition: transform var(--transition-slow), box-shadow var(--transition-slow);
}

.book-card:hover .book-card-cover {
  box-shadow: var(--shadow-xl);
}

/* Featured card enhanced hover */
.featured-card {
  perspective: 1000px;
}

.featured-card:hover {
  transform: translateY(-8px) rotateX(1.5deg);
}

/* ------------------------------------------------------------
   Smooth Scroll Behavior
   ------------------------------------------------------------ */
html {
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  .fade-in {
    opacity: 1;
    transform: none;
    transition: none;
  }
  .book-card:hover,
  .featured-card:hover {
    transform: none;
  }
}

/* ------------------------------------------------------------
   Enhanced Button Hover States
   ------------------------------------------------------------ */
.btn--amazon:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn--amazon:active {
  transform: translateY(0);
  box-shadow: var(--shadow-sm);
}

.btn--outline:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}


/* ============================================================
   PHASE 4: CATALOG CONTROLS — Navigation, Filtering & Search
   ============================================================ */

/* ------------------------------------------------------------
   Catalog Section Layout
   ------------------------------------------------------------ */
.catalog-section {
  background: var(--color-bg-page);
  padding-block: var(--space-16);
}

.catalog-controls {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  margin-bottom: var(--space-8);
  padding: var(--space-6);
  background: var(--color-bg-surface);
  border-radius: var(--radius-2xl);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}

@media (min-width: 1024px) {
  .catalog-controls {
    padding: var(--space-6) var(--space-8);
  }
}

/* ------------------------------------------------------------
   Search Bar
   ------------------------------------------------------------ */
.catalog-search {
  position: relative;
  width: 100%;
}

.catalog-search-input {
  width: 100%;
  padding: var(--space-3) var(--space-5) var(--space-3) var(--space-12);
  border-radius: var(--radius-full);
  border: 2px solid var(--color-border);
  background: white;
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text-primary);
  outline: none;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.catalog-search-input:focus {
  border-color: var(--color-primary-500);
  box-shadow: 0 0 0 3px rgba(30, 58, 95, 0.1);
}

.catalog-search-input::placeholder {
  color: var(--color-text-muted);
}

.catalog-search-icon {
  position: absolute;
  left: var(--space-4);
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-text-muted);
  pointer-events: none;
  display: flex;
  align-items: center;
}

/* ------------------------------------------------------------
   Category Filter Buttons
   ------------------------------------------------------------ */
.catalog-filters {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.catalog-filter-btn {
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
  border: 2px solid var(--color-border);
  background: white;
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.catalog-filter-btn:hover {
  border-color: var(--color-primary-300);
  color: var(--color-primary-700);
  background: var(--color-primary-50);
}

.catalog-filter-btn.active {
  border-color: var(--color-primary-600);
  background: var(--color-primary-600);
  color: white;
}

/* ------------------------------------------------------------
   Age Range Filter Buttons
   ------------------------------------------------------------ */
.catalog-age-filters {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.catalog-age-btn {
  padding: var(--space-1-5) var(--space-3);
  border-radius: var(--radius-full);
  border: 1px solid var(--color-border);
  background: white;
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  color: var(--color-text-muted);
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.catalog-age-btn:hover {
  border-color: var(--color-accent-400);
  color: var(--color-accent-600);
  background: rgba(245, 158, 11, 0.05);
}

.catalog-age-btn.active {
  border-color: var(--color-accent-500);
  background: var(--color-accent-500);
  color: var(--color-neutral-900);
}

/* ------------------------------------------------------------
   Sort Select
   ------------------------------------------------------------ */
.catalog-sort {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.catalog-sort-label {
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  color: var(--color-text-secondary);
  white-space: nowrap;
}

.catalog-sort-select {
  padding: var(--space-2) var(--space-8) var(--space-2) var(--space-3);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  background: white;
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--color-text-primary);
  cursor: pointer;
  outline: none;
  appearance: none;
  -webkit-appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%236b7280' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  transition: border-color var(--transition-fast);
}

.catalog-sort-select:focus {
  border-color: var(--color-primary-500);
}

/* ------------------------------------------------------------
   Results Info
   ------------------------------------------------------------ */
.catalog-results-info {
  margin-bottom: var(--space-4);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--color-text-muted);
}

/* ------------------------------------------------------------
   Catalog Grid
   ------------------------------------------------------------ */
.catalog-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-4);
}

@media (min-width: 640px) {
  .catalog-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-5);
  }
}

@media (min-width: 1024px) {
  .catalog-grid {
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-6);
  }
}

@media (min-width: 1280px) {
  .catalog-grid {
    grid-template-columns: repeat(5, 1fr);
  }
}

/* ------------------------------------------------------------
   Load More
   ------------------------------------------------------------ */
.catalog-load-more {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-3);
  margin-top: var(--space-10);
}

.catalog-load-more-btn {
  min-width: 200px;
}

.catalog-load-more-info {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

/* ------------------------------------------------------------
   Catalog Empty State
   ------------------------------------------------------------ */
.catalog-empty {
  grid-column: 1 / -1;
  text-align: center;
  padding: var(--space-16);
}

/* ------------------------------------------------------------
   Screen reader only utility (if not already defined)
   ------------------------------------------------------------ */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}


/* ============================================================
   PHASE 5: SOCIAL PROOF & CONVERSION
   ============================================================ */

/* ------------------------------------------------------------
   Region Detection Banner
   ------------------------------------------------------------ */
.region-banner {
  background: var(--color-primary-50);
  border-bottom: 1px solid var(--color-primary-100);
  padding: var(--space-3) 0;
  font-size: var(--text-sm);
  color: var(--color-primary-700);
}

.region-banner-inner {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
}

.region-banner-text {
  text-align: center;
}

.region-banner-text strong {
  font-weight: var(--font-bold);
}

.region-banner-close {
  background: none;
  border: none;
  font-size: 1.25rem;
  color: var(--color-primary-400);
  cursor: pointer;
  padding: var(--space-1);
  line-height: 1;
  transition: color var(--transition-fast);
}

.region-banner-close:hover {
  color: var(--color-primary-700);
}

/* ------------------------------------------------------------
   Testimonials Section
   ------------------------------------------------------------ */
.testimonials-section {
  background: linear-gradient(135deg, var(--color-primary-50) 0%, var(--color-bg-page) 100%);
  padding-block: var(--space-16);
}

.testimonials-carousel {
  position: relative;
  display: flex;
  align-items: center;
  gap: var(--space-4);
  max-width: 700px;
  margin: 0 auto;
}

.testimonials-track {
  position: relative;
  width: 100%;
  min-height: 220px;
  overflow: hidden;
}

.testimonial-card {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  opacity: 0;
  transform: translateX(30px);
  transition: opacity 0.4s ease, transform 0.4s ease;
  pointer-events: none;
  background: white;
  border-radius: var(--radius-2xl);
  padding: var(--space-8);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--color-border);
}

.testimonial-card.active {
  opacity: 1;
  transform: translateX(0);
  pointer-events: auto;
  position: relative;
}

.testimonial-stars {
  font-size: var(--text-lg);
  color: var(--color-accent-500);
  margin-bottom: var(--space-3);
  letter-spacing: 2px;
}

.testimonial-text {
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.7;
  color: var(--color-text-primary);
  margin: 0 0 var(--space-4) 0;
  font-style: italic;
  border: none;
  padding: 0;
}

.testimonial-meta {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-2);
}

.testimonial-author {
  font-weight: var(--font-bold);
  color: var(--color-text-primary);
  font-size: var(--text-sm);
}

.testimonial-source {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.testimonial-book {
  font-size: var(--text-xs);
  color: var(--color-primary-500);
  font-weight: var(--font-semibold);
}

/* Testimonial navigation arrows */
.testimonial-nav {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 2px solid var(--color-border);
  background: white;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--color-text-secondary);
  transition: all var(--transition-fast);
}

.testimonial-nav:hover {
  border-color: var(--color-primary-500);
  color: var(--color-primary-600);
  background: var(--color-primary-50);
}

/* Testimonial dots */
.testimonial-dots {
  display: flex;
  justify-content: center;
  gap: var(--space-2);
  margin-top: var(--space-6);
}

.testimonial-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  border: 2px solid var(--color-border);
  background: transparent;
  cursor: pointer;
  padding: 0;
  transition: all var(--transition-fast);
}

.testimonial-dot.active {
  background: var(--color-primary-600);
  border-color: var(--color-primary-600);
  transform: scale(1.2);
}

.testimonial-dot:hover {
  border-color: var(--color-primary-400);
}

/* Mobile: hide arrows, rely on dots + swipe */
@media (max-width: 640px) {
  .testimonial-nav {
    display: none;
  }

  .testimonial-card {
    padding: var(--space-5);
  }

  .testimonials-track {
    min-height: 260px;
  }
}

/* ------------------------------------------------------------
   Share Button (on featured cards)
   ------------------------------------------------------------ */
.share-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 1px solid var(--color-border);
  background: white;
  cursor: pointer;
  color: var(--color-text-muted);
  transition: all var(--transition-fast);
  margin-left: var(--space-2);
}

.share-btn:hover {
  border-color: var(--color-primary-500);
  color: var(--color-primary-600);
  background: var(--color-primary-50);
  transform: scale(1.1);
}

.share-btn--copied {
  background: var(--color-accent-500) !important;
  border-color: var(--color-accent-500) !important;
  color: white !important;
}

/* ------------------------------------------------------------
   Animated counter shimmer (subtle pulse during count)
   ------------------------------------------------------------ */
@keyframes counter-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.7; }
}

.hero-stat-number.counting {
  animation: counter-pulse 0.3s ease-in-out infinite;
}

/* ============================================================
   SUBCATEGORY / SEASONAL FILTER BUTTONS
   ============================================================ */
.catalog-subcategory-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  padding: 0.75rem 0;
  border-top: 1px solid var(--color-border, #e2e8f0);
  border-bottom: 1px solid var(--color-border, #e2e8f0);
  margin-bottom: 0.5rem;
}

.catalog-subcategory-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.4rem 0.9rem;
  border: 1.5px solid var(--color-border, #e2e8f0);
  border-radius: 2rem;
  background: var(--color-surface, #fff);
  color: var(--color-text-muted, #64748b);
  font-size: 0.82rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
  white-space: nowrap;
}

.catalog-subcategory-btn:hover {
  border-color: var(--color-primary, #1e293b);
  color: var(--color-primary, #1e293b);
  transform: translateY(-1px);
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.08);
}

.catalog-subcategory-btn.active {
  background: var(--color-primary, #1e293b);
  border-color: var(--color-primary, #1e293b);
  color: #fff;
  box-shadow: 0 2px 8px rgba(30, 41, 59, 0.2);
}

/* Seasonal highlight — glowing border for "in season" subcategories */
.catalog-subcategory-btn.in-season {
  border-color: var(--color-accent, #f59e0b);
  background: linear-gradient(135deg, #fffbeb 0%, #fef3c7 100%);
  color: #92400e;
  animation: seasonPulse 2s ease-in-out infinite;
}

.catalog-subcategory-btn.in-season:hover {
  background: linear-gradient(135deg, #fef3c7 0%, #fde68a 100%);
  border-color: #d97706;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(245, 158, 11, 0.3);
}

.catalog-subcategory-btn.in-season.active {
  background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
  border-color: #b45309;
  color: #fff;
  animation: none;
}

@keyframes seasonPulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(245, 158, 11, 0.2); }
  50% { box-shadow: 0 0 0 4px rgba(245, 158, 11, 0.1); }
}

/* Season badge inside the button */
.season-badge {
  display: inline-block;
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  background: #f59e0b;
  color: #fff;
  padding: 0.1rem 0.4rem;
  border-radius: 1rem;
  margin-left: 0.25rem;
}

.catalog-subcategory-btn.active .season-badge {
  background: rgba(255, 255, 255, 0.3);
}

/* Responsive: stack on mobile */
@media (max-width: 640px) {
  .catalog-subcategory-filters {
    gap: 0.4rem;
    padding: 0.5rem 0;
  }

  .catalog-subcategory-btn {
    font-size: 0.75rem;
    padding: 0.35rem 0.7rem;
  }
}


/* ============================================================
   BACK TO TOP
   ============================================================ */

/* Per-section subtle back-to-top arrows */
.scroll-top {
  display: flex;
  justify-content: flex-end;
  margin-top: var(--space-8);
}

.scroll-top a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: var(--color-primary-100);
  color: var(--color-primary-600);
  border-radius: 50%;
  text-decoration: none;
  font-size: var(--text-xl);
  font-weight: var(--font-bold);
  transition: all var(--transition-base);
  opacity: 0.55;
  border: 2px solid transparent;
  line-height: 1;
}

.scroll-top a:hover {
  opacity: 1;
  background: var(--color-primary-600);
  color: white;
  border-color: var(--color-primary-700);
  transform: translateY(-3px);
}

/* Floating fixed back-to-top button (appears on scroll) */
.back-to-top-fixed {
  position: fixed;
  bottom: var(--space-8);
  right: var(--space-8);
  width: 50px;
  height: 50px;
  background: var(--color-primary-600);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  font-size: var(--text-2xl);
  font-weight: var(--font-bold);
  box-shadow: 0 4px 12px rgba(124, 58, 237, 0.35);
  transition: all var(--transition-base);
  opacity: 0;
  visibility: hidden;
  z-index: var(--z-sticky);
  border: none;
  cursor: pointer;
  line-height: 1;
}

.back-to-top-fixed.visible {
  opacity: 1;
  visibility: visible;
}

.back-to-top-fixed:hover {
  background: var(--color-primary-700);
  transform: translateY(-3px);
  box-shadow: 0 6px 16px rgba(124, 58, 237, 0.5);
}

/* Light text variant for on dark backgrounds */
.scroll-top--light a {
  background: rgba(255, 255, 255, 0.15);
  color: rgba(255, 255, 255, 0.7);
}

.scroll-top--light a:hover {
  background: rgba(255, 255, 255, 0.3);
  color: white;
  border-color: rgba(255, 255, 255, 0.4);
}


/* Cover image as clickable Amazon link */
.book-card-cover a.cover-link,
.book-cover-wrap a.cover-link {
  display: block;
  text-decoration: none;
  line-height: 0;
}
.book-card-cover a.cover-link:hover {
  opacity: 0.9;
}