/* ===================================================
   NEWPURITAN PUBLISHING — Main Stylesheet
   Brand: Navy (#0D1F3C), Gold accent (#C9A84C)
=================================================== */

/* ---------- RESET & BASE ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --navy:       #0D1F3C;
  --navy-mid:   #1A3260;
  --navy-light: #243d6b;
  --gold:       #C9A84C;
  --gold-light: #e8c96a;
  --cream:      #F8F5EF;
  --white:      #ffffff;
  --gray-100:   #f4f4f4;
  --gray-200:   #e8e8e8;
  --gray-400:   #9e9e9e;
  --gray-600:   #5a5a5a;
  --text-dark:  #1a1a1a;
  --text-mid:   #3d3d3d;

  --font-serif: 'Noto Serif KR', 'Playfair Display', serif;
  --font-sans:  'Noto Sans KR', sans-serif;

  --radius-sm:  6px;
  --radius-md:  12px;
  --radius-lg:  20px;
  --shadow-sm:  0 2px 8px rgba(0,0,0,.08);
  --shadow-md:  0 6px 24px rgba(0,0,0,.12);
  --shadow-lg:  0 16px 48px rgba(0,0,0,.16);
  --transition: .3s ease;
}

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: var(--font-sans);
  color: var(--text-dark);
  background: var(--white);
  line-height: 1.7;
  overflow-x: hidden;
}

a { text-decoration: none; color: inherit; transition: color var(--transition); }
img { max-width: 100%; display: block; }
ul { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- HEADER ---------- */
#site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  background: rgba(13, 31, 60, 0.97);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(201,168,76,.2);
  transition: box-shadow var(--transition);
}
#site-header.scrolled { box-shadow: 0 4px 20px rgba(0,0,0,.3); }

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo img {
  height: 40px;
  width: auto;
  filter: brightness(0) invert(1);
  transition: opacity var(--transition);
}
.nav-logo:hover img { opacity: .85; }

.nav-menu {
  display: flex;
  gap: 8px;
  align-items: center;
}

.nav-link {
  color: rgba(255,255,255,.85);
  font-size: .9rem;
  font-weight: 500;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  letter-spacing: .03em;
  transition: all var(--transition);
}
.nav-link:hover,
.nav-link.active {
  color: var(--gold-light);
  background: rgba(201,168,76,.1);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 6px;
}
.nav-toggle span {
  display: block;
  width: 24px; height: 2px;
  background: var(--white);
  border-radius: 2px;
  transition: all var(--transition);
}

/* ---------- HERO ---------- */
#hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--navy) 0%, var(--navy-mid) 50%, #0a1628 100%);
  overflow: hidden;
}

/* 배경 패턴 */
#hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(ellipse 80% 60% at 70% 30%, rgba(201,168,76,.08) 0%, transparent 60%),
    radial-gradient(ellipse 50% 80% at 20% 80%, rgba(26,50,96,.6) 0%, transparent 60%);
}
#hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.015'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.hero-bg-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, transparent 60%, rgba(13,31,60,.4) 100%);
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  padding: 120px 24px 80px;
  max-width: 760px;
}

.hero-badge {
  display: inline-block;
  padding: 6px 20px;
  border: 1px solid rgba(201,168,76,.5);
  color: var(--gold-light);
  font-size: .75rem;
  font-weight: 600;
  letter-spacing: .15em;
  border-radius: 100px;
  margin-bottom: 28px;
  background: rgba(201,168,76,.08);
}

.hero-title {
  font-family: var(--font-serif);
  font-size: clamp(2.8rem, 6vw, 5rem);
  font-weight: 700;
  color: var(--white);
  line-height: 1.25;
  margin-bottom: 24px;
  letter-spacing: -.02em;
}

.hero-subtitle {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: rgba(255,255,255,.7);
  margin-bottom: 48px;
  line-height: 1.8;
  letter-spacing: .02em;
}

.hero-btns {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: var(--radius-sm);
  font-size: .95rem;
  font-weight: 600;
  letter-spacing: .03em;
  transition: all var(--transition);
}
.btn-primary {
  background: var(--gold);
  color: var(--navy);
}
.btn-primary:hover {
  background: var(--gold-light);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(201,168,76,.4);
}
.btn-outline {
  border: 1.5px solid rgba(255,255,255,.4);
  color: var(--white);
}
.btn-outline:hover {
  border-color: var(--white);
  background: rgba(255,255,255,.1);
  transform: translateY(-2px);
}

.hero-scroll-hint {
  position: absolute;
  bottom: 36px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  color: rgba(255,255,255,.4);
  font-size: .65rem;
  letter-spacing: .15em;
  animation: bounceDown 2s infinite;
}
@keyframes bounceDown {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50%       { transform: translateX(-50%) translateY(6px); }
}

/* ---------- SECTION COMMON ---------- */
section { padding: 100px 0; }

.section-header {
  text-align: center;
  margin-bottom: 64px;
}
.section-header.light .section-title,
.section-header.light .section-label,
.section-header.light .section-sub { color: var(--white); }
.section-header.light .section-sub { color: rgba(255,255,255,.7); }

.section-label {
  display: inline-block;
  font-size: .7rem;
  font-weight: 700;
  letter-spacing: .2em;
  color: var(--gold);
  margin-bottom: 12px;
  text-transform: uppercase;
}

.section-title {
  font-family: var(--font-serif);
  font-size: clamp(1.8rem, 3.5vw, 2.8rem);
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 16px;
  letter-spacing: -.02em;
  line-height: 1.3;
}

.section-sub {
  font-size: 1rem;
  color: var(--gray-600);
  max-width: 520px;
  margin: 0 auto;
  line-height: 1.7;
}

/* ---------- ABOUT ---------- */
#about {
  background: var(--cream);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: start;
}

.about-text .section-label { display: block; margin-bottom: 12px; }

.about-divider {
  width: 48px; height: 3px;
  background: linear-gradient(90deg, var(--gold), transparent);
  margin: 20px 0 32px;
  border-radius: 2px;
}

.about-desc {
  color: var(--text-mid);
  font-size: .97rem;
  line-height: 1.9;
  margin-bottom: 20px;
}
.about-mission {
  font-weight: 600;
  color: var(--navy);
  border-left: 3px solid var(--gold);
  padding-left: 16px;
  background: rgba(201,168,76,.06);
  padding: 14px 16px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin-top: 8px;
}

.about-stats {
  display: flex;
  gap: 0;
  margin-top: 40px;
  background: var(--white);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}
.stat-item {
  flex: 1;
  padding: 24px 20px;
  text-align: center;
}
.stat-num {
  display: block;
  font-family: var(--font-serif);
  font-size: 2rem;
  font-weight: 700;
  color: var(--navy);
  line-height: 1;
  margin-bottom: 6px;
}
.stat-label {
  font-size: .8rem;
  color: var(--gray-400);
  letter-spacing: .05em;
}
.stat-divider {
  width: 1px;
  background: var(--gray-200);
  margin: 16px 0;
}

.about-quote-card {
  background: var(--navy);
  color: var(--white);
  border-radius: var(--radius-md);
  padding: 36px;
  margin-bottom: 20px;
  position: relative;
  overflow: hidden;
}
.about-quote-card::before {
  content: '';
  position: absolute;
  top: -20px; right: -20px;
  width: 120px; height: 120px;
  background: radial-gradient(circle, rgba(201,168,76,.15) 0%, transparent 70%);
}
.about-quote-card .fa-quote-left {
  color: var(--gold);
  font-size: 1.5rem;
  margin-bottom: 16px;
  opacity: .8;
}
.about-quote-card blockquote {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  line-height: 1.8;
  color: rgba(255,255,255,.9);
  margin-bottom: 20px;
}
.quote-author {
  font-size: .85rem;
  color: var(--gold-light);
  letter-spacing: .05em;
}

.about-info-card {
  background: var(--white);
  border-radius: var(--radius-md);
  padding: 28px;
  box-shadow: var(--shadow-sm);
}
.about-info-list li {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 10px 0;
  border-bottom: 1px solid var(--gray-100);
  font-size: .9rem;
  color: var(--text-mid);
}
.about-info-list li:last-child { border-bottom: none; }
.about-info-list i {
  color: var(--gold);
  width: 16px;
  flex-shrink: 0;
  margin-top: 3px;
}
.about-info-list a:hover { color: var(--navy); }

/* ---------- SERIES ---------- */
#series {
  background: var(--white);
}

.series-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.series-card {
  background: var(--white);
  border: 1.5px solid var(--gray-200);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  text-align: center;
  transition: all var(--transition);
  cursor: pointer;
}
.series-card:hover {
  border-color: var(--navy);
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}

.series-icon {
  width: 72px; height: 72px;
  background: linear-gradient(135deg, var(--navy), var(--navy-mid));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 24px;
}
.series-icon i {
  font-size: 1.6rem;
  color: var(--gold);
}

.series-card h3 {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 12px;
  line-height: 1.4;
}
.series-card p {
  font-size: .88rem;
  color: var(--gray-600);
  line-height: 1.7;
  margin-bottom: 24px;
}

.series-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: .85rem;
  font-weight: 600;
  color: var(--navy);
  letter-spacing: .03em;
  transition: gap var(--transition);
}
.series-link:hover { gap: 12px; color: var(--gold); }

/* ---------- BOOKS SECTION ---------- */
#books {
  background: var(--gray-100);
}

.filter-bar {
  display: flex;
  gap: 10px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 48px;
}

.filter-btn {
  padding: 9px 24px;
  border-radius: 100px;
  font-size: .88rem;
  font-weight: 600;
  color: var(--gray-600);
  border: 1.5px solid var(--gray-200);
  background: var(--white);
  transition: all var(--transition);
  letter-spacing: .03em;
}
.filter-btn:hover {
  border-color: var(--navy);
  color: var(--navy);
}
.filter-btn.active {
  background: var(--navy);
  color: var(--white);
  border-color: var(--navy);
}

.books-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 24px;
}

/* ---------- BOOK CARD ---------- */
.book-card {
  background: var(--white);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  cursor: pointer;
  transition: all var(--transition);
  display: flex;
  flex-direction: column;
  animation: fadeInUp .4s ease both;
}
.book-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-5px);
}
.book-card.hidden { display: none; }

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}

.book-cover {
  position: relative;
  aspect-ratio: 3/4;
  overflow: hidden;
  background: var(--gray-100);
}
.book-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .5s ease;
}
.book-card:hover .book-cover img { transform: scale(1.05); }

.book-cover-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(13,31,60,.85) 0%, transparent 50%);
  opacity: 0;
  transition: opacity var(--transition);
  display: flex;
  align-items: flex-end;
  padding: 16px;
}
.book-card:hover .book-cover-overlay { opacity: 1; }
.book-cover-overlay span {
  color: var(--white);
  font-size: .8rem;
  font-weight: 600;
  letter-spacing: .05em;
  display: flex;
  align-items: center;
  gap: 6px;
}

.book-badge {
  position: absolute;
  top: 10px; left: 10px;
  padding: 3px 10px;
  border-radius: 100px;
  font-size: .68rem;
  font-weight: 700;
  letter-spacing: .04em;
}
.badge-light  { background: var(--gold);   color: var(--navy); }
.badge-set    { background: var(--navy);   color: var(--white); }
.badge-single { background: rgba(13,31,60,.75); color: var(--white); }
.badge-new    { background: #e74c3c;       color: var(--white); }

.book-info {
  padding: 16px;
  flex: 1;
  display: flex;
  flex-direction: column;
}
.book-series-tag {
  font-size: .7rem;
  color: var(--gold);
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
  margin-bottom: 6px;
}
.book-title {
  font-family: var(--font-serif);
  font-size: .9rem;
  font-weight: 700;
  color: var(--navy);
  line-height: 1.4;
  margin-bottom: 8px;
  flex: 1;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.book-author {
  font-size: .78rem;
  color: var(--gray-400);
  margin-bottom: 10px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.book-price {
  font-weight: 700;
  font-size: .9rem;
  color: var(--navy-mid);
}

/* ---------- MODAL ---------- */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.7);
  backdrop-filter: blur(6px);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  opacity: 0;
  pointer-events: none;
  transition: opacity .3s ease;
}
.modal-overlay.open {
  opacity: 1;
  pointer-events: all;
}

.modal-box {
  background: var(--white);
  border-radius: var(--radius-lg);
  max-width: 700px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  position: relative;
  transform: scale(.95) translateY(10px);
  transition: transform .3s ease;
  box-shadow: var(--shadow-lg);
}
.modal-overlay.open .modal-box {
  transform: scale(1) translateY(0);
}

.modal-close {
  position: absolute;
  top: 16px; right: 16px;
  width: 36px; height: 36px;
  background: var(--gray-100);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: .9rem;
  color: var(--gray-600);
  z-index: 10;
  transition: all var(--transition);
}
.modal-close:hover {
  background: var(--navy);
  color: var(--white);
}

.modal-inner {
  padding: 40px;
}

.modal-grid {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 36px;
}

.modal-cover {
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  aspect-ratio: 3/4;
}
.modal-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.modal-series-tag {
  font-size: .72rem;
  font-weight: 700;
  color: var(--gold);
  letter-spacing: .1em;
  margin-bottom: 10px;
}
.modal-title {
  font-family: var(--font-serif);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--navy);
  line-height: 1.35;
  margin-bottom: 20px;
}

.modal-meta {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 24px;
}
.modal-meta-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: .88rem;
}
.modal-meta-item .meta-label {
  min-width: 52px;
  font-weight: 600;
  color: var(--navy);
  font-size: .8rem;
}
.modal-meta-item .meta-value {
  color: var(--text-mid);
  flex: 1;
}

.modal-price-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 0;
  border-top: 1px solid var(--gray-200);
  margin-bottom: 24px;
}
.modal-price {
  font-family: var(--font-serif);
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--navy);
}

.modal-bookstore-btns {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
}
.modal-bookstore-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 11px 16px;
  border-radius: var(--radius-sm);
  font-size: .84rem;
  font-weight: 600;
  transition: all var(--transition);
  border: 1.5px solid transparent;
}
.modal-bookstore-btn:hover { transform: translateY(-1px); box-shadow: var(--shadow-sm); }

.btn-kyobo    { background: #03388a; color: var(--white); }
.btn-yes24    { background: #e40020; color: var(--white); }
.btn-aladin   { background: #ef6c00; color: var(--white); }
.btn-youngpoong { background: #1a6e3c; color: var(--white); }

/* ---------- CONTACT ---------- */
#contact {
  background: var(--navy);
}
#contact .section-title { color: var(--white); }

.contact-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 60px;
}

.contact-card {
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.1);
  border-radius: var(--radius-md);
  padding: 36px 28px;
  text-align: center;
  transition: all var(--transition);
}
.contact-card:hover {
  background: rgba(255,255,255,.1);
  border-color: rgba(201,168,76,.4);
}

.contact-icon {
  width: 60px; height: 60px;
  background: rgba(201,168,76,.15);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
}
.contact-icon i { font-size: 1.4rem; color: var(--gold); }

.contact-card h3 {
  font-size: .85rem;
  font-weight: 700;
  color: rgba(255,255,255,.5);
  letter-spacing: .1em;
  text-transform: uppercase;
  margin-bottom: 10px;
}
.contact-card p,
.contact-card a {
  font-size: .95rem;
  color: rgba(255,255,255,.85);
  line-height: 1.7;
}
.contact-card a:hover { color: var(--gold-light); }

/* ---------- BOOKSTORE ---------- */
.bookstore-section {
  text-align: center;
}
.bookstore-section h3 {
  font-family: var(--font-serif);
  font-size: 1.3rem;
  color: var(--white);
  margin-bottom: 28px;
}

.bookstore-grid {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

.bookstore-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 36px;
  border-radius: var(--radius-sm);
  font-weight: 700;
  font-size: 1rem;
  transition: all var(--transition);
  min-width: 140px;
}
.bookstore-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0,0,0,.3);
}
.bookstore-btn.kyobo       { background: #03388a; color: var(--white); }
.bookstore-btn.yes24       { background: #e40020; color: var(--white); }
.bookstore-btn.aladin      { background: #ef6c00; color: var(--white); }
.bookstore-btn.youngpoong  { background: #1a6e3c; color: var(--white); }

/* ---------- FOOTER ---------- */
#site-footer {
  background: #060f1e;
  padding: 64px 0 0;
  color: rgba(255,255,255,.6);
}

.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1.5fr;
  gap: 60px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255,255,255,.08);
}

.footer-logo {
  height: 36px;
  width: auto;
  filter: brightness(0) invert(1) opacity(.6);
  margin-bottom: 16px;
}
.footer-brand p {
  font-size: .88rem;
  line-height: 1.7;
  color: rgba(255,255,255,.5);
}

.footer-links h4,
.footer-contact-info h4 {
  font-size: .8rem;
  font-weight: 700;
  color: rgba(255,255,255,.4);
  letter-spacing: .12em;
  text-transform: uppercase;
  margin-bottom: 20px;
}
.footer-links ul li {
  margin-bottom: 10px;
}
.footer-links a {
  font-size: .88rem;
  color: rgba(255,255,255,.55);
  transition: color var(--transition);
}
.footer-links a:hover { color: var(--gold-light); }

.footer-contact-info ul li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: .85rem;
  color: rgba(255,255,255,.55);
  margin-bottom: 10px;
}
.footer-contact-info i {
  color: var(--gold);
  width: 14px;
  flex-shrink: 0;
  margin-top: 3px;
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 0;
  font-size: .8rem;
  color: rgba(255,255,255,.3);
  flex-wrap: wrap;
  gap: 8px;
}

/* ===================================================
   RESPONSIVE
=================================================== */
@media (max-width: 1024px) {
  .about-grid         { grid-template-columns: 1fr; gap: 48px; }
  .footer-top         { grid-template-columns: 1fr 1fr; gap: 40px; }
  .footer-top .footer-brand { grid-column: span 2; }
}

@media (max-width: 768px) {
  .nav-menu {
    display: none;
    position: fixed;
    top: 72px; left: 0; right: 0;
    background: var(--navy);
    flex-direction: column;
    padding: 24px;
    gap: 4px;
    border-top: 1px solid rgba(255,255,255,.1);
  }
  .nav-menu.open { display: flex; }
  .nav-toggle { display: flex; }

  .series-grid  { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .footer-top   { grid-template-columns: 1fr; }
  .footer-top .footer-brand { grid-column: span 1; }
  .footer-bottom { flex-direction: column; text-align: center; }

  .modal-grid { grid-template-columns: 1fr; }
  .modal-inner { padding: 28px 24px; }
  .modal-cover { max-width: 180px; margin: 0 auto; }

  .books-grid { grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 16px; }
  .bookstore-grid { gap: 10px; }
  .bookstore-btn  { min-width: 120px; padding: 12px 24px; font-size: .9rem; }

  section { padding: 72px 0; }
}

@media (max-width: 480px) {
  .books-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
  .hero-btns  { flex-direction: column; align-items: center; }
  .btn        { width: 100%; max-width: 280px; justify-content: center; }
  .modal-bookstore-btns { grid-template-columns: 1fr; }
  .filter-bar { gap: 8px; }
  .filter-btn { padding: 7px 16px; font-size: .82rem; }
}

/* ---------- SCROLL BAR ---------- */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--gray-100); }
::-webkit-scrollbar-thumb { background: var(--navy-light); border-radius: 3px; }

/* ---------- SELECTION ---------- */
::selection { background: var(--gold); color: var(--navy); }