/* ============================================================
   Siddhartha Chatterjee Portfolio — Main Stylesheet
   Design: Dark luxury gold on deep charcoal
   ============================================================ */

/* ── 1. CSS CUSTOM PROPERTIES ──────────────────────────────── */
:root {
  --gold:        #c9a84c;
  --gold-light:  #e8c97a;
  --gold-dark:   #9a7b2f;
  --black:       #0a0a0a;
  --dark:        #111111;
  --dark-2:      #1a1a1a;
  --dark-3:      #242424;
  --light-bg:    #f8f5ef;
  --white:       #ffffff;
  --text:        #2c2c2c;
  --text-muted:  #777777;
  --text-light:  #aaaaaa;
  --border:      #e0d8c8;
  --font-serif:  'Playfair Display', Georgia, serif;
  --font-sans:   'Inter', system-ui, sans-serif;
  --font-italic: 'Cormorant Garamond', Georgia, serif;
  --radius:      8px;
  --radius-lg:   16px;
  --shadow:      0 4px 24px rgba(0,0,0,.10);
  --shadow-lg:   0 12px 48px rgba(0,0,0,.16);
  --trans:       .3s ease;
  --header-h:    76px;
}

/* ── 2. RESET & BASE ────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font-sans);
  color: var(--text);
  background: var(--white);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a  { color: var(--gold); text-decoration: none; transition: color var(--trans); }
a:hover { color: var(--gold-dark); }
ul { list-style: none; }
address { font-style: normal; }

/* ── 3. TYPOGRAPHY ─────────────────────────────────────────── */
h1,h2,h3,h4,h5,h6 {
  font-family: var(--font-serif);
  line-height: 1.2;
  color: var(--dark);
  font-weight: 700;
}
h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.6rem, 3.5vw, 2.6rem); }
h3 { font-size: clamp(1.2rem, 2vw, 1.6rem); }
h4 { font-size: 1.1rem; }
p  { margin-bottom: 1rem; }
em { font-family: var(--font-italic); font-style: italic; }

/* ── 4. LAYOUT UTILITIES ────────────────────────────────────── */
.container {
  width: 90%;
  max-width: 1200px;
  margin: 0 auto;
}
.section { padding: 90px 0; }
.bg-light { background: var(--light-bg); }
.bg-dark  { background: var(--dark-2); }
.mt-2 { margin-top: 2rem; }

.section-eyebrow {
  display: inline-block;
  font-family: var(--font-sans);
  font-size: .75rem;
  font-weight: 600;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: .75rem;
}
.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 3.5rem;
}
.section-header h2 { margin-bottom: .75rem; }
.section-header p  { color: var(--text-muted); font-size: 1.05rem; }
.section-cta { text-align: center; margin-top: 3rem; }

/* ── 5. BUTTONS ─────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  padding: .7rem 1.8rem;
  border-radius: 4px;
  font-family: var(--font-sans);
  font-size: .9rem;
  font-weight: 600;
  letter-spacing: .04em;
  cursor: pointer;
  transition: all var(--trans);
  border: 2px solid transparent;
  text-decoration: none;
}
.btn-gold {
  background: var(--gold);
  color: var(--dark);
  border-color: var(--gold);
}
.btn-gold:hover {
  background: var(--gold-light);
  border-color: var(--gold-light);
  color: var(--dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(201,168,76,.35);
}
.btn-outline {
  background: transparent;
  color: var(--gold);
  border-color: var(--gold);
}
.btn-outline:hover {
  background: var(--gold);
  color: var(--dark);
  transform: translateY(-2px);
}
.btn-outline-light {
  background: transparent;
  color: var(--white);
  border-color: rgba(255,255,255,.6);
}
.btn-outline-light:hover {
  background: rgba(255,255,255,.15);
  color: var(--white);
  border-color: var(--white);
}
.btn-lg  { padding: .9rem 2.4rem; font-size: 1rem; }
.btn-sm  { padding: .45rem 1rem; font-size: .82rem; }
.btn-block { width: 100%; justify-content: center; }

/* ── 6. PRELOADER ───────────────────────────────────────────── */
#preloader {
  position: fixed; inset: 0; z-index: 9999;
  background: var(--dark);
  display: flex; align-items: center; justify-content: center;
  transition: opacity .5s ease, visibility .5s ease;
}
#preloader.hidden { opacity: 0; visibility: hidden; pointer-events: none; }
.preloader-inner  { text-align: center; }
.preloader-logo   {
  font-family: var(--font-serif); font-size: 3rem;
  color: var(--gold); letter-spacing: .1em; margin-bottom: 1.5rem;
  animation: pulse 1.5s ease-in-out infinite;
}
.preloader-bar    { width: 180px; height: 2px; background: rgba(201,168,76,.2); border-radius: 2px; overflow: hidden; }
.preloader-bar span {
  display: block; height: 100%; width: 0;
  background: var(--gold); border-radius: 2px;
  animation: loadBar 1.8s ease-in-out forwards;
}
@keyframes pulse    { 0%,100%{opacity:1} 50%{opacity:.4} }
@keyframes loadBar  { to { width: 100%; } }

/* ── 7. HEADER ──────────────────────────────────────────────── */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  height: var(--header-h);
  background: rgba(10,10,10,.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(201,168,76,.15);
  transition: background var(--trans), box-shadow var(--trans);
}
.site-header.scrolled {
  background: rgba(10,10,10,.98);
  box-shadow: 0 4px 30px rgba(0,0,0,.4);
}
.header-inner {
  height: 100%;
  display: flex; align-items: center; gap: 2rem;
}
.site-logo { display: flex; align-items: center; gap: .75rem; text-decoration: none; }
.logo-text  { display: flex; align-items: center; gap: .75rem; }
.logo-initials {
  width: 44px; height: 44px; border-radius: 50%;
  background: var(--gold); color: var(--dark);
  font-family: var(--font-serif); font-weight: 900; font-size: 1.1rem;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.logo-name {
  font-family: var(--font-serif); font-size: .9rem; line-height: 1.3;
  color: var(--white); font-weight: 600;
}
.logo-name em { color: var(--gold); font-style: italic; }

.main-nav { margin-left: auto; }
.main-nav ul { display: flex; gap: 2rem; }
.main-nav a {
  font-size: .88rem; font-weight: 500; letter-spacing: .04em;
  color: rgba(255,255,255,.8); text-transform: uppercase;
  padding-bottom: 4px;
  border-bottom: 2px solid transparent;
  transition: all var(--trans);
}
.main-nav a:hover, .main-nav a.active {
  color: var(--gold); border-bottom-color: var(--gold);
}
.header-cta { margin-left: 1.5rem; }

/* Hamburger */
.nav-toggle {
  display: none; flex-direction: column; gap: 5px;
  background: none; border: none; cursor: pointer;
  padding: 6px; margin-left: auto;
}
.nav-toggle span {
  display: block; width: 26px; height: 2px;
  background: var(--white); border-radius: 2px;
  transition: all var(--trans);
}
.nav-toggle.open span:nth-child(1) { transform: rotate(45deg) translate(5px,5px); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: rotate(-45deg) translate(5px,-5px); }

/* Mobile drawer */
.mobile-drawer {
  position: fixed; top: var(--header-h); right: 0; bottom: 0;
  width: min(320px,85vw); background: var(--dark);
  border-left: 1px solid rgba(201,168,76,.15);
  padding: 2rem 1.5rem;
  transform: translateX(100%);
  transition: transform var(--trans);
  z-index: 999; overflow-y: auto;
}
.mobile-drawer.open { transform: translateX(0); }
.mobile-drawer ul { display: flex; flex-direction: column; gap: 0; }
.mobile-drawer li a {
  display: block; padding: 1rem 0;
  border-bottom: 1px solid rgba(255,255,255,.07);
  color: var(--white); font-size: 1.05rem; font-weight: 500;
  transition: color var(--trans);
}
.mobile-drawer li a:hover { color: var(--gold); }
.drawer-overlay {
  display: none; position: fixed; inset: 0;
  background: rgba(0,0,0,.6); z-index: 998;
}
.drawer-overlay.show { display: block; }

#main-content { padding-top: var(--header-h); }

/* ── 8. HERO SLIDER ─────────────────────────────────────────── */
.hero-slider {
  position: relative; height: calc(100vh - var(--header-h));
  min-height: 520px; overflow: hidden;
}
.slider-track { position: relative; width: 100%; height: 100%; }
.slide {
  position: absolute; inset: 0;
  background-size: cover; background-position: center;
  opacity: 0; transition: opacity .9s ease;
  display: flex; align-items: center;
}
.slide.active { opacity: 1; z-index: 1; }
.slide-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(to right, rgba(5,5,5,.82) 0%, rgba(5,5,5,.4) 60%, rgba(5,5,5,.15) 100%);
}
.slide-content {
  position: relative; z-index: 2;
  max-width: 680px;
}
.slide-eyebrow {
  display: block; font-size: .75rem; letter-spacing: .2em;
  text-transform: uppercase; color: var(--gold); margin-bottom: 1rem;
}
.slide-title {
  font-size: clamp(2rem, 5.5vw, 4rem);
  color: var(--white); font-weight: 900; line-height: 1.1;
  margin-bottom: 1.25rem;
}
.slide-subtitle {
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: rgba(255,255,255,.8);
  font-family: var(--font-italic); font-style: italic;
  margin-bottom: 2rem;
}
.slider-btn {
  position: absolute; top: 50%; z-index: 10;
  transform: translateY(-50%);
  width: 52px; height: 52px; border-radius: 50%;
  background: rgba(201,168,76,.15);
  border: 1px solid rgba(201,168,76,.4);
  color: var(--gold); font-size: 1rem; cursor: pointer;
  transition: all var(--trans);
  display: flex; align-items: center; justify-content: center;
}
.slider-btn:hover { background: var(--gold); color: var(--dark); }
.slider-btn.prev { left: 2rem; }
.slider-btn.next { right: 2rem; }
.slider-dots {
  position: absolute; bottom: 2rem; left: 50%;
  transform: translateX(-50%);
  display: flex; gap: .6rem; z-index: 10;
}
.dot {
  width: 10px; height: 10px; border-radius: 50%;
  background: rgba(255,255,255,.35); border: none; cursor: pointer;
  transition: all var(--trans);
}
.dot.active { background: var(--gold); transform: scale(1.3); }

/* Slide animations */
.animate-up { animation: slideUp .8s ease both; }
.delay-1    { animation-delay: .2s; }
.delay-2    { animation-delay: .4s; }
@keyframes slideUp {
  from { opacity: 0; transform: translateY(30px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ── 9. PAGE BANNER ─────────────────────────────────────────── */
.page-banner {
  position: relative; padding: 100px 0 70px;
  background-size: cover; background-position: center;
  background-color: var(--dark-2);
  margin-top: 0;
}
.page-banner-sm { padding: 80px 0 55px; }
.page-banner-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(135deg, rgba(5,5,5,.85) 0%, rgba(5,5,5,.6) 100%);
}
.page-banner-content {
  position: relative; z-index: 2; text-align: center;
}
.page-banner-content h1 { color: var(--white); margin-bottom: .75rem; }
.breadcrumb {
  display: flex; align-items: center; justify-content: center;
  gap: .5rem; font-size: .85rem;
}
.breadcrumb a { color: var(--gold); }
.breadcrumb span:last-child { color: rgba(255,255,255,.6); }

/* ── 10. ABOUT TEASER (Home) ────────────────────────────────── */
.about-teaser-grid {
  display: grid; grid-template-columns: 1fr 1.3fr;
  gap: 5rem; align-items: center;
}
.author-img-frame {
  position: relative; border-radius: var(--radius-lg); overflow: hidden;
  box-shadow: var(--shadow-lg);
  aspect-ratio: 3/4;
}
.author-img-frame img { width: 100%; height: 100%; object-fit: cover; }
.author-img-placeholder {
  width: 100%; height: 100%; background: var(--dark-3);
  display: flex; align-items: center; justify-content: center;
  font-size: 5rem; color: var(--gold);
}
.author-badge {
  position: absolute; bottom: -1rem; right: -1rem;
  width: 90px; height: 90px; border-radius: 50%;
  background: var(--gold); color: var(--dark);
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  box-shadow: 0 6px 20px rgba(201,168,76,.4);
}
.badge-number { font-family: var(--font-serif); font-size: 1.4rem; font-weight: 900; line-height: 1; }
.badge-label  { font-size: .52rem; font-weight: 600; text-transform: uppercase; letter-spacing: .08em; text-align: center; }
.author-role  { color: var(--gold); font-size: .9rem; font-weight: 500; letter-spacing: .04em; margin-bottom: 1.2rem; }
.about-text   { color: var(--text-muted); font-size: 1.05rem; line-height: 1.8; margin-bottom: 2rem; }
.about-stats  { display: flex; gap: 2.5rem; margin-bottom: 2rem; flex-wrap: wrap; }
.stat-item    { text-align: center; }
.stat-number  { display: block; font-family: var(--font-serif); font-size: 2.2rem; font-weight: 900; color: var(--gold); line-height: 1; }
.stat-label   { font-size: .78rem; text-transform: uppercase; letter-spacing: .1em; color: var(--text-muted); }

/* ── 11. BOOK CARDS ─────────────────────────────────────────── */
.books-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 2rem;
}
.books-grid-large { grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); }
.book-card {
  background: var(--white); border-radius: var(--radius-lg);
  overflow: hidden; box-shadow: var(--shadow);
  transition: transform var(--trans), box-shadow var(--trans);
}
.book-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-lg); }
.book-cover-wrap { position: relative; aspect-ratio: 2/3; overflow: hidden; }
.book-cover-wrap img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s ease; }
.book-card:hover .book-cover-wrap img { transform: scale(1.05); }
.book-cover-placeholder {
  width: 100%; height: 100%; background: linear-gradient(135deg, var(--dark-2), var(--dark-3));
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 1rem; padding: 1.5rem; text-align: center;
}
.book-cover-placeholder i { font-size: 3rem; color: var(--gold); }
.book-cover-placeholder span { color: rgba(255,255,255,.7); font-family: var(--font-serif); font-size: .9rem; }
.book-cover-placeholder.sm i { font-size: 2rem; }
.book-cover-placeholder.md { aspect-ratio: 2/3; }
.book-overlay {
  position: absolute; inset: 0; background: rgba(5,5,5,.7);
  display: flex; align-items: center; justify-content: center;
  opacity: 0; transition: opacity var(--trans);
}
.book-card:hover .book-overlay { opacity: 1; }
.book-language-badge {
  position: absolute; top: .75rem; left: .75rem;
  background: var(--gold); color: var(--dark);
  font-size: .68rem; font-weight: 700; letter-spacing: .08em;
  text-transform: uppercase; padding: .25rem .6rem; border-radius: 3px;
}
.book-info { padding: 1.25rem; }
.book-info h3 { font-size: 1rem; margin-bottom: .3rem; color: var(--dark); line-height: 1.3; }
.book-subtitle { font-size: .82rem; color: var(--text-muted); margin-bottom: .6rem; }
.book-desc { font-size: .85rem; color: var(--text-muted); line-height: 1.6; margin-bottom: 1rem; }
.book-actions { display: flex; gap: .5rem; flex-wrap: wrap; }
.book-read-link { font-size: .82rem; font-weight: 600; color: var(--gold); display: inline-flex; align-items: center; gap: .3rem; margin-top: .5rem; }
.lang-badge {
  display: inline-block; background: var(--light-bg); color: var(--gold-dark);
  font-size: .72rem; font-weight: 600; letter-spacing: .06em;
  text-transform: uppercase; padding: .2rem .55rem; border-radius: 3px;
  border: 1px solid var(--border);
}

/* ── 12. QUOTE BANNER ───────────────────────────────────────── */
.quote-banner {
  background: var(--dark);
  padding: 70px 0;
}
.quote-banner blockquote {
  max-width: 800px; margin: 0 auto; text-align: center; position: relative;
}
.quote-icon { font-size: 3rem; color: rgba(201,168,76,.25); display: block; margin-bottom: 1rem; }
.quote-banner p {
  font-family: var(--font-italic); font-style: italic;
  font-size: clamp(1.2rem, 2.5vw, 1.7rem);
  color: var(--white); line-height: 1.6; margin-bottom: 1.25rem;
}
.quote-banner cite { color: var(--gold); font-size: .9rem; font-weight: 500; font-style: normal; }

/* ── 13. CTA SECTION ────────────────────────────────────────── */
.cta-section {
  background: linear-gradient(135deg, var(--gold-dark) 0%, var(--gold) 50%, var(--gold-dark) 100%);
}
.cta-inner { text-align: center; max-width: 700px; margin: 0 auto; }
.cta-inner h2 { color: var(--dark); margin-bottom: 1rem; }
.cta-inner p  { color: rgba(10,10,10,.75); font-size: 1.05rem; margin-bottom: 2rem; }
.cta-inner .section-eyebrow { color: var(--dark); opacity: .7; }
.cta-buttons { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; }
.cta-section .btn-gold { background: var(--dark); border-color: var(--dark); color: var(--gold); }
.cta-section .btn-gold:hover { background: var(--dark-2); border-color: var(--dark-2); }

/* ── 14. AUTHOR PROFILE (About page) ────────────────────────── */
.author-profile-grid { display: grid; grid-template-columns: 400px 1fr; gap: 5rem; align-items: start; }
.portrait-frame { border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-lg); aspect-ratio: 3/4; }
.portrait-frame img { width: 100%; height: 100%; object-fit: cover; }
.achievement-list { margin-top: 1.5rem; display: flex; flex-direction: column; gap: .75rem; }
.achievement-item { display: flex; align-items: flex-start; gap: .75rem; font-size: .9rem; color: var(--text); }
.achievement-item i { color: var(--gold); margin-top: .18rem; flex-shrink: 0; }
.author-bio h2 { margin-bottom: .5rem; }
.bio-text { font-size: 1.05rem; color: var(--text-muted); line-height: 1.85; margin-bottom: 2rem; }
.bio-text p { margin-bottom: 1rem; }
.bio-text strong { color: var(--text); }

/* Authored books list */
.authored-books-list { display: flex; flex-direction: column; gap: 1.5rem; }
.authored-book-item {
  display: flex; align-items: flex-start; gap: 1.5rem;
  background: var(--white); border-radius: var(--radius);
  padding: 1.25rem; box-shadow: var(--shadow);
  transition: transform var(--trans);
}
.authored-book-item:hover { transform: translateX(6px); }
.authored-book-cover { width: 80px; flex-shrink: 0; border-radius: 4px; overflow: hidden; }
.authored-book-cover img { width: 100%; aspect-ratio: 2/3; object-fit: cover; }
.authored-book-details { flex: 1; }
.authored-book-details h3 { font-size: 1.1rem; margin-bottom: .25rem; }
.authored-book-details p  { font-size: .88rem; color: var(--text-muted); }
.authored-book-actions { flex-shrink: 0; }

/* Publisher card */
.publisher-card {
  display: flex; align-items: flex-start; gap: 2rem; max-width: 700px; margin: 0 auto;
  background: var(--light-bg); border-radius: var(--radius-lg);
  padding: 2.5rem; border: 1px solid var(--border);
}
.publisher-icon { font-size: 2.5rem; color: var(--gold); flex-shrink: 0; }
.publisher-details h3 { margin-bottom: .5rem; }
.publisher-details p  { color: var(--text-muted); }
.publisher-details address p { font-size: .92rem; color: var(--text-muted); display: flex; align-items: center; gap: .5rem; margin-bottom: .4rem; }
.publisher-details address i  { color: var(--gold); width: 14px; }

/* ── 15. GALLERY ────────────────────────────────────────────── */
.gallery-filters {
  display: flex; flex-wrap: wrap; gap: 1rem;
  justify-content: center; margin-bottom: 3rem;
}
.filter-group { display: flex; flex-wrap: wrap; gap: .5rem; }
.filter-btn {
  padding: .5rem 1.2rem; border-radius: 30px;
  border: 1px solid var(--border); background: var(--white);
  color: var(--text); font-size: .85rem; font-weight: 500;
  cursor: pointer; transition: all var(--trans); text-decoration: none;
}
.filter-btn:hover, .filter-btn.active {
  background: var(--gold); border-color: var(--gold); color: var(--dark);
}
.filter-btn.sm { font-size: .78rem; padding: .35rem .9rem; }

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.25rem;
}
.gallery-item { border-radius: var(--radius); overflow: hidden; background: var(--dark-3); }
.gallery-img-wrap, .gallery-video-wrap {
  position: relative; cursor: pointer; overflow: hidden;
  aspect-ratio: 16/10;
}
.gallery-img-wrap img, .gallery-video-wrap img {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform .5s ease;
}
.gallery-item:hover img { transform: scale(1.05); }
.gallery-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(to top, rgba(0,0,0,.7) 0%, rgba(0,0,0,.2) 60%, transparent 100%);
  display: flex; flex-direction: column; align-items: center; justify-content: flex-end;
  padding: 1rem; opacity: 0; transition: opacity var(--trans);
}
.gallery-item:hover .gallery-overlay { opacity: 1; }
.gallery-overlay i    { font-size: 1.8rem; color: var(--white); margin-bottom: .5rem; }
.gallery-overlay span { color: var(--white); font-size: .85rem; font-weight: 500; text-align: center; }
.video-overlay { cursor: pointer; }
.play-icon { font-size: 3rem !important; color: #ff0000 !important; }
.gallery-caption { font-size: .82rem; color: var(--text-muted); padding: .6rem .75rem; }

/* Lightbox */
.lightbox, .video-modal {
  position: fixed; inset: 0; z-index: 2000;
  display: flex; align-items: center; justify-content: center;
  padding: 1rem;
}
.lightbox-backdrop {
  position: fixed; inset: 0; background: rgba(0,0,0,.92); z-index: 1999;
}
.lightbox-content { position: relative; z-index: 2001; max-width: 92vw; max-height: 90vh; text-align: center; }
.lightbox-content img { max-height: 85vh; max-width: 85vw; object-fit: contain; border-radius: var(--radius); }
.lightbox-caption { color: rgba(255,255,255,.7); font-size: .9rem; margin-top: .75rem; }
.lightbox-close {
  position: fixed; top: 1rem; right: 1.5rem; z-index: 2002;
  background: none; border: none; color: var(--white);
  font-size: 2rem; cursor: pointer; line-height: 1; padding: .25rem;
  transition: color var(--trans);
}
.lightbox-close:hover { color: var(--gold); }
.lightbox-prev, .lightbox-next {
  position: fixed; top: 50%; z-index: 2002;
  transform: translateY(-50%);
  background: rgba(201,168,76,.2); border: 1px solid rgba(201,168,76,.4);
  color: var(--gold); padding: .75rem 1rem; cursor: pointer;
  border-radius: 4px; font-size: 1.1rem; transition: all var(--trans);
}
.lightbox-prev:hover, .lightbox-next:hover { background: var(--gold); color: var(--dark); }
.lightbox-prev { left: 1rem; }
.lightbox-next { right: 1rem; }
.video-modal-inner { position: relative; z-index: 2001; width: 90vw; max-width: 900px; }
.video-responsive { position: relative; padding-bottom: 56.25%; border-radius: var(--radius); overflow: hidden; }
.video-responsive iframe { position: absolute; inset: 0; width: 100%; height: 100%; }

/* ── 16. CONTACT ────────────────────────────────────────────── */
.contact-grid { display: grid; grid-template-columns: 1fr 1.5fr; gap: 5rem; align-items: start; }
.contact-info h2 { margin-bottom: 1rem; }
.contact-info > p { color: var(--text-muted); margin-bottom: 2rem; line-height: 1.8; }
.contact-details { display: flex; flex-direction: column; gap: 1.5rem; }
.contact-item { display: flex; gap: 1rem; align-items: flex-start; }
.contact-icon {
  width: 44px; height: 44px; border-radius: 50%;
  background: rgba(201,168,76,.1); border: 1px solid rgba(201,168,76,.25);
  display: flex; align-items: center; justify-content: center;
  color: var(--gold); flex-shrink: 0;
}
.contact-item strong { display: block; font-size: .85rem; letter-spacing: .06em; text-transform: uppercase; color: var(--text-muted); margin-bottom: .2rem; }
.contact-item p { font-size: .95rem; }
.contact-item a { color: var(--text); }
.contact-item a:hover { color: var(--gold); }

/* Form */
.contact-form-wrap { background: var(--light-bg); border-radius: var(--radius-lg); padding: 2.5rem; border: 1px solid var(--border); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1.25rem; }
.form-group { display: flex; flex-direction: column; gap: .4rem; margin-bottom: 1.25rem; }
.form-group label { font-size: .85rem; font-weight: 600; color: var(--text); }
.form-group input, .form-group textarea, .form-group select {
  padding: .75rem 1rem; border: 1.5px solid var(--border);
  border-radius: var(--radius); font-family: var(--font-sans); font-size: .95rem;
  background: var(--white); color: var(--text);
  transition: border-color var(--trans), box-shadow var(--trans);
  width: 100%;
}
.form-group input:focus, .form-group textarea:focus, .form-group select:focus {
  outline: none; border-color: var(--gold);
  box-shadow: 0 0 0 3px rgba(201,168,76,.15);
}
.form-group textarea { resize: vertical; min-height: 140px; }
.req { color: #e53e3e; }

/* ── 17. ALERTS ─────────────────────────────────────────────── */
.alert {
  padding: 1rem 1.25rem; border-radius: var(--radius);
  margin-bottom: 1.25rem; font-size: .92rem;
  display: flex; align-items: flex-start; gap: .75rem;
}
.alert ul { margin: .25rem 0 0 1rem; }
.alert-success { background: #f0fdf4; border: 1px solid #86efac; color: #166534; }
.alert-error   { background: #fef2f2; border: 1px solid #fca5a5; color: #991b1b; }
.alert-info    { background: #eff6ff; border: 1px solid #93c5fd; color: #1e40af; }
.form-success  { flex-direction: column; }
.form-success strong { font-size: 1rem; }
.empty-state {
  text-align: center; padding: 5rem 1rem; color: var(--text-muted);
}
.empty-state i { font-size: 3rem; color: var(--gold); opacity: .4; display: block; margin-bottom: 1rem; }
.no-pdf-msg { color: var(--text-muted); font-size: .92rem; display: flex; align-items: center; gap: .5rem; }

/* ── 18. BOOK READER ────────────────────────────────────────── */
.book-reader-meta { display: flex; gap: 3rem; align-items: flex-start; margin-bottom: 3rem; flex-wrap: wrap; }
.book-reader-cover { width: 220px; flex-shrink: 0; border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-lg); }
.book-reader-cover img { width: 100%; aspect-ratio: 2/3; object-fit: cover; }
.book-reader-info { flex: 1; min-width: 260px; }
.book-reader-info h2 { margin-bottom: .5rem; }
.book-reader-info .lang-badge { margin-bottom: 1rem; display: inline-block; }
.book-desc-full { font-size: .95rem; color: var(--text-muted); line-height: 1.8; margin-bottom: 1.5rem; }
.book-reader-actions { display: flex; flex-wrap: wrap; gap: .75rem; }

.flipbook-wrapper { background: var(--dark); border-radius: var(--radius-lg); overflow: hidden; }
.flipbook-toolbar {
  display: flex; align-items: center; gap: 1rem;
  padding: .75rem 1.25rem; background: var(--dark-2);
  border-bottom: 1px solid rgba(255,255,255,.08);
  flex-wrap: wrap;
}
.fb-btn {
  display: inline-flex; align-items: center; gap: .4rem;
  background: rgba(201,168,76,.12); border: 1px solid rgba(201,168,76,.3);
  color: var(--gold); padding: .45rem 1rem; border-radius: 4px;
  font-size: .85rem; cursor: pointer; transition: all var(--trans);
}
.fb-btn:hover  { background: var(--gold); color: var(--dark); }
.fb-btn:disabled { opacity: .35; cursor: default; pointer-events: none; }
.fb-page-info  { color: rgba(255,255,255,.6); font-size: .85rem; margin: 0 auto; }
.fb-fullscreen { margin-left: auto; }
.flipbook-container { overflow: hidden; }
#flipbook { min-height: 500px; display: flex; align-items: center; justify-content: center; padding: 1.5rem; }
.fb-page { display: none; max-width: 100%; border-radius: var(--radius); box-shadow: 0 20px 60px rgba(0,0,0,.6); }
.fb-page-active { display: block; animation: fadeIn .3s ease; }
.fb-loading { text-align: center; color: var(--text-light); padding: 3rem; }
.fb-loading i { font-size: 2rem; color: var(--gold); display: block; margin-bottom: 1rem; }
@keyframes fadeIn { from { opacity:0; } to { opacity:1; } }

/* ── 19. FOOTER ─────────────────────────────────────────────── */
.site-footer { background: var(--dark); }
.footer-top  { border-bottom: 1px solid rgba(255,255,255,.07); }
.footer-grid {
  display: grid;
  grid-template-columns: 1.8fr repeat(3, 1fr);
  gap: 3rem; padding: 4rem 0;
}
.footer-brand .footer-logo-text { display: flex; align-items: center; gap: .75rem; margin-bottom: 1rem; }
.footer-brand .logo-name { font-size: .85rem; }
.footer-brand p { color: rgba(255,255,255,.5); font-size: .88rem; line-height: 1.75; }
.footer-col h4 { color: var(--white); font-size: .85rem; letter-spacing: .1em; text-transform: uppercase; margin-bottom: 1.25rem; }
.footer-col ul { display: flex; flex-direction: column; gap: .65rem; }
.footer-col li a { color: rgba(255,255,255,.5); font-size: .88rem; transition: color var(--trans); }
.footer-col li a:hover { color: var(--gold); }
.footer-col address p { color: rgba(255,255,255,.5); font-size: .85rem; display: flex; align-items: flex-start; gap: .5rem; margin-bottom: .5rem; }
.footer-col address i { color: var(--gold); width: 14px; margin-top: .22rem; flex-shrink: 0; }
.footer-col address a { color: rgba(255,255,255,.5); }
.footer-col address a:hover { color: var(--gold); }
.social-links { display: flex; gap: .75rem; margin-top: 1.25rem; flex-wrap: wrap; }
.social-links a {
  width: 38px; height: 38px; border-radius: 50%;
  background: rgba(255,255,255,.07); border: 1px solid rgba(255,255,255,.1);
  display: flex; align-items: center; justify-content: center;
  color: rgba(255,255,255,.6); font-size: .88rem;
  transition: all var(--trans);
}
.social-links a:hover { background: var(--gold); border-color: var(--gold); color: var(--dark); }
.footer-bottom { padding: 1.5rem 0; text-align: center; }
.footer-bottom p { color: rgba(255,255,255,.35); font-size: .82rem; }
.footer-legal    { margin-top: .25rem; }

/* Back to top */
.back-to-top {
  position: fixed; bottom: 2rem; right: 2rem; z-index: 800;
  width: 44px; height: 44px; border-radius: 50%;
  background: var(--gold); color: var(--dark); border: none; cursor: pointer;
  display: flex; align-items: center; justify-content: center; font-size: 1rem;
  box-shadow: 0 4px 16px rgba(201,168,76,.4);
  opacity: 0; visibility: hidden; transform: translateY(10px);
  transition: all var(--trans);
}
.back-to-top.visible { opacity: 1; visibility: visible; transform: translateY(0); }
.back-to-top:hover { background: var(--gold-light); }

/* ── 20. AOS SIMPLE ANIMATIONS ──────────────────────────────── */
[data-aos] { opacity: 0; transform: translateY(24px); transition: opacity .7s ease, transform .7s ease; }
[data-aos][data-aos-delay="80"]  { transition-delay: .08s; }
[data-aos][data-aos-delay="100"] { transition-delay: .1s; }
[data-aos][data-aos-delay="160"] { transition-delay: .16s; }
[data-aos][data-aos-delay="200"] { transition-delay: .2s; }
[data-aos][data-aos-delay="240"] { transition-delay: .24s; }
[data-aos][data-aos-delay="320"] { transition-delay: .32s; }
[data-aos="fade-right"] { transform: translateX(-24px); }
[data-aos="fade-left"]  { transform: translateX(24px); }
[data-aos="zoom-in"]    { transform: scale(.93); }
[data-aos].aos-animate  { opacity: 1; transform: none !important; }

/* ── 21. RESPONSIVE ─────────────────────────────────────────── */
@media (max-width: 1100px) {
  .about-teaser-grid  { grid-template-columns: 1fr 1.2fr; gap: 3rem; }
  .author-profile-grid{ grid-template-columns: 320px 1fr; gap: 3rem; }
  .footer-grid        { grid-template-columns: 1fr 1fr; row-gap: 2.5rem; }
}
@media (max-width: 900px) {
  .main-nav, .header-cta { display: none; }
  .nav-toggle { display: flex; }
  .about-teaser-grid, .author-profile-grid, .contact-grid { grid-template-columns: 1fr; gap: 2.5rem; }
  .author-img-frame { max-width: 380px; margin: 0 auto; }
  .portrait-frame   { max-width: 340px; margin: 0 auto; }
  .about-stats      { justify-content: center; }
  .form-row         { grid-template-columns: 1fr; }
  .slider-btn.prev  { left: .75rem; }
  .slider-btn.next  { right: .75rem; }
}
@media (max-width: 700px) {
  :root { --header-h: 64px; }
  .section { padding: 60px 0; }
  .footer-grid { grid-template-columns: 1fr; gap: 2rem; }
  .books-grid { grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 1rem; }
  .gallery-grid { grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); }
  .book-reader-meta { flex-direction: column; }
  .book-reader-cover { width: 160px; }
  .authored-book-item { flex-wrap: wrap; }
  .publisher-card { flex-direction: column; gap: 1rem; }
  .contact-form-wrap { padding: 1.5rem; }
  .cta-buttons { flex-direction: column; align-items: center; }
}
@media (max-width: 480px) {
  .slide-title { font-size: 1.8rem; }
  .slide-content { padding: 0 1rem; }
  .about-stats { gap: 1.5rem; }
  .stat-number { font-size: 1.8rem; }
}

/* ── 22. PRINT ──────────────────────────────────────────────── */
@media print {
  .site-header, .hero-slider, .back-to-top, .site-footer { display: none; }
  #main-content { padding-top: 0; }
}

/* ── 23. BOOK READER PAGE (read-book.php) ───────────────────── */
.page-read-book #main-content { padding-top: 0; }
.page-read-book .site-footer  { display: none; }
.page-read-book .back-to-top  { display: none; }