/* =========================================================
   Titan Publisher – Portfolio page
   Unique diamond mosaic + 3D books + cinematic hero
   ========================================================= */

:root {
  --tp-navy: #0C1927;
  --tp-gold: #B78C50;
  --tp-gold-light: #CAAA7D;
  --tp-cream: #f9f7f2;
  --tp-dark: #182028;
  --tp-text: #333;
  --tp-muted: #666;
  --tp-white: #ffffff;
  --font-body: 'Inter', system-ui, sans-serif;
  --font-heading: 'Playfair Display', Georgia, serif;

  /* Mosaic geometric palette (Titan-adapted) */
  --m-gold: rgba(183, 140, 80, 1);
  --m-navy: rgba(12, 25, 39, 1);
  --m-bronze: rgba(140, 100, 50, 1);
  --m-cream: rgba(249, 247, 242, 1);
  --m-deep: rgba(26, 45, 66, 1);
  --columns: 3;
}

.portfolio-page {
  overflow-x: hidden;
}

.pf-eyebrow {
  font-family: var(--font-body);
  font-size: 25px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--tp-navy);
  margin-bottom: 12px;
}

.pf-section-title {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  color: var(--tp-navy);
  line-height: 1.2;
  margin-bottom: 12px;
}
.pf-section-title.light { color: var(--tp-gold); }

/* ---------- Buttons ---------- */
.btn-pf-primary {
  display: inline-block;
  background: var(--tp-gold);
  color: #fff !important;
  font-weight: 600;
  padding: 14px 28px;
  border-radius: 8px;
  border: 2px solid var(--tp-gold);
  text-decoration: none;
  transition: background 0.25s, transform 0.2s, box-shadow 0.25s;
}
.btn-pf-primary:hover {
  background: #a67a42;
  border-color: #a67a42;
  color: #fff !important;
  transform: translateY(-2px);
  box-shadow: 0 10px 28px rgba(183, 140, 80, 0.4);
}
.btn-pf-outline {
  display: inline-block;
  background: transparent;
  color: #fff !important;
  font-weight: 600;
  padding: 14px 28px;
  border-radius: 8px;
  border: 2px solid rgba(255,255,255,0.7);
  text-decoration: none;
  transition: all 0.25s;
}
.btn-pf-outline:hover {
  background: #fff;
  color: var(--tp-navy) !important;
  border-color: #fff;
}
.btn-pf-outline-light {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: transparent;
  color: #fff !important;
  font-weight: 600;
  padding: 14px 28px;
  border-radius: 8px;
  border: 2px solid rgba(255,255,255,0.7);
  text-decoration: none;
  transition: all 0.25s;
}
.btn-pf-outline-light:hover {
  background: #fff;
  color: var(--tp-navy) !important;
}

/* =========================================================
   HERO – cinematic + CSS 3D floating books
   ========================================================= */
.pf-hero {
  position: relative;
  min-height: 92vh;
  display: flex;
  align-items: center;
  background-image: linear-gradient(rgba(0, 0, 0, 0.55), rgba(0, 0, 0, 0.55)), url("../images/cover1copy.jpg");
  background-size: cover;
  background-repeat: no-repeat;
  overflow: hidden;
  padding: 120px 0 80px;
}
.pf-hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 20% 80%, rgba(183,140,80,0.12) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 20%, rgba(183,140,80,0.08) 0%, transparent 45%);
  pointer-events: none;
}

/* 3D floating books stage */
.pf-hero-books {
  position: absolute;
  inset: 0;
  perspective: 1200px;
  pointer-events: none;
  z-index: 1;
}
.float-book {
  position: absolute;
  width: 90px;
  height: 130px;
  transform-style: preserve-3d;
  animation: bookFloat 8s ease-in-out infinite;
}
.fb-cover {
  position: absolute;
  inset: 0;
  background: linear-gradient(145deg, var(--tp-gold), #8b6914);
  border-radius: 2px 6px 6px 2px;
  box-shadow: 8px 12px 24px rgba(0,0,0,0.45);
  transform: translateZ(8px);
}
.fb-spine {
  position: absolute;
  left: 0;
  top: 0;
  width: 14px;
  height: 100%;
  background: linear-gradient(90deg, #6b5220, var(--tp-gold));
  transform: rotateY(-90deg) translateZ(0);
  transform-origin: left center;
}
.fb-pages {
  position: absolute;
  right: 0;
  top: 2px;
  bottom: 2px;
  width: 10px;
  background: repeating-linear-gradient(to bottom, #f5f0e6 0px, #f5f0e6 2px, #e8e0d0 2px, #e8e0d0 3px);
  transform: rotateY(90deg) translateZ(0);
  transform-origin: right center;
  border-radius: 0 2px 2px 0;
}
.fb-1 { top: 18%; left: 8%; animation-delay: 0s; animation-duration: 9s; }
.fb-1 .fb-cover { background-image: url(/images/biography/The-Ferrari-Salesman.webp); background-size: cover; background-position: center; background-repeat: no-repeat; }
.fb-2 { top: 55%; left: 12%; animation-delay: -2s; animation-duration: 7s; width: 70px; height: 100px; }
.fb-2 .fb-cover { background-image: url(/images/biography/When-music-lives.webp); background-size: cover; background-position: center; background-repeat: no-repeat; }
.fb-3 { top: 22%; right: 10%; animation-delay: -1s; animation-duration: 10s; width: 100px; height: 145px; }
.fb-3 .fb-cover { background-image: url(/images/fiction/Diverging-Paths.webp); background-size: cover; background-position: center; background-repeat: no-repeat; }
.fb-4 { top: 60%; right: 14%; animation-delay: -3.5s; animation-duration: 8s; width: 75px; height: 110px; }
.fb-4 .fb-cover { background-image: url(/images/fiction/the-tradegy.webp); background-size: cover; background-position: center; background-repeat: no-repeat; }
.fb-5 { top: 40%; left: 22%; animation-delay: -5s; animation-duration: 11s; width: 60px; height: 88px; opacity: 0.85; }
.fb-5 .fb-cover { background-image: url(/images/non-fiction/stardust.webp); background-size: cover; background-position: center; background-repeat: no-repeat; }

@keyframes bookFloat {
  0%, 100% { transform: translateY(0) rotateY(-18deg) rotateX(8deg) rotateZ(-4deg); }
  50% { transform: translateY(-28px) rotateY(12deg) rotateX(-6deg) rotateZ(3deg); }
}

.container .pf-hero-content{
  text-align: center;
}
.pf-hero-content {
  position: relative;
  z-index: 2;
}
.pf-hero .pf-eyebrow { color: var(--tp-gold-light); }
.pf-hero-title {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: clamp(2.6rem, 6vw, 4.2rem);
  color: #fff;
  line-height: 1.08;
  margin-bottom: 20px;
}
.pf-hero-title span {
  background: linear-gradient(90deg, var(--tp-gold-light), var(--tp-gold));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}
.pf-hero-sub {
  font-size: 1.15rem;
  color: rgba(255,255,255,0.82);
  line-height: 1.7;
  margin-bottom: 32px;
  padding-right: 150px;
  padding-left: 150px;
}

@media (max-width:768px) {
  .pf-hero-sub {
    padding-right: 120px;
    padding-left: 120px;
  }
}

@media (max-width:576px) {
  .pf-hero-sub {
    padding-right: 100px;
    padding-left: 100px;
  }
}

@media (max-width:450px)  {
  .pf-hero-sub {
    padding-right: 20px;
    padding-left: 20px;
  }
}


.pf-hero-actions {
  flex-wrap: wrap;
  display: inline-flex;
  gap: 25px;
}
.pf-scroll-hint {
  position: absolute;
  bottom: 28px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  color: rgba(255,255,255,0.45);
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  z-index: 2;
  animation: scrollBounce 2s ease-in-out infinite;
}
@keyframes scrollBounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(8px); }
}

/* =========================================================
   3D FEATURED SHELF – scrollable, arrows + drag work
   ========================================================= */
.pf-shelf-section {
  background: var(--tp-cream);
  padding: 70px 0 50px;
  overflow: hidden;
}

.pf-shelf-outer {
  position: relative;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 56px;
}

.pf-shelf-stage {
  overflow-x: auto;
  overflow-y: hidden;
  scroll-behavior: smooth;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  cursor: grab;
  /* hide scrollbar but keep scroll */
  scrollbar-width: none;
  -ms-overflow-style: none;
  padding: 36px 8px 48px;
}
.pf-shelf-stage::-webkit-scrollbar {
  display: none;
}
.pf-shelf-stage.is-dragging {
  cursor: grabbing;
  scroll-behavior: auto;
  user-select: none;
}

.pf-shelf-track {
  display: flex;
  gap: 32px;
  width: max-content;
  padding: 0 12px;
}

.shelf-book {
  flex: 0 0 150px;
  text-align: center;
  scroll-snap-align: center;
}

.shelf-book-3d {
  width: 140px;
  height: 200px;
  margin: 0 auto 14px;
  position: relative;
  transform-style: preserve-3d;
  transform: rotateY(-16deg) rotateX(5deg);
  transition: transform 0.4s cubic-bezier(0.22, 1, 0.36, 1);
  perspective: 800px;
}
.shelf-book:hover .shelf-book-3d {
  transform: rotateY(6deg) rotateX(-3deg) translateY(-10px) scale(1.05);
}

.shelf-face {
  position: absolute;
  inset: 0;
  backface-visibility: hidden;
  border-radius: 3px 8px 8px 3px;
  overflow: hidden;
}
.shelf-face.front {
  transform: translateZ(12px);
  box-shadow: 10px 16px 28px rgba(0,0,0,0.32);
}
.shelf-face.front img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  pointer-events: none;
}
.shelf-face.spine {
  width: 20px;
  left: 0;
  background: linear-gradient(90deg, #3d2914, #6b5220);
  transform: rotateY(-90deg) translateZ(0);
  transform-origin: left center;
}
.shelf-face.back {
  background: linear-gradient(145deg, #2a2118, #1a1510);
  transform: translateZ(-12px) rotateY(180deg);
}

.shelf-title {
  font-family: var(--font-body);
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--tp-navy);
  margin: 0;
}

.pf-shelf-arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-60%);
  z-index: 5;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  border: 1.5px solid rgba(12,25,39,0.15);
  background: #fff;
  color: var(--tp-navy);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 14px rgba(0,0,0,0.08);
  transition: background 0.2s, color 0.2s, border-color 0.2s, transform 0.2s;
}
.pf-shelf-arrow:hover {
  background: var(--tp-navy);
  color: #B78C50;
  border-color: var(--tp-navy);
}
.pf-shelf-arrow:active {
  transform: translateY(-60%) scale(0.94);
}
.pf-shelf-prev { left: 4px; }
.pf-shelf-next { right: 4px; }

.pf-shelf-hint {
  text-align: center;
  font-size: 0.82rem;
  color: var(--tp-muted);
  margin: 4px 0 0;
}

/* =========================================================
   DIAMOND MOSAIC – improved from your provided CSS
   Titan colors + 3D hover + parallax container
   ========================================================= */
.pf-mosaic-section {
  background: #d8d1c0;
  padding: 80px 0 40px;
  overflow: hidden;
}
.pf-mosaic-sub {
  color: black;
  font-size: 20px;
  max-width: 480px;
  font-weight: 500;
  margin: 0 auto 10px;
}

.pf-mosaic-parallax {
  /* no 3D on parent – keeps diamond clip-paths stable */
}

.pf-mosaic {
  display: grid;
  grid-template-columns: repeat(var(--columns), 1fr);
  margin: 160px -20px 80px;
  list-style: none;
  padding: 0;
}

.pf-mosaic li {
  grid-column-end: span 2;
  position: relative;
  width: 100%;
  padding-bottom: 100%;
  margin-top: -50%;
  z-index: 1;
}
.pf-mosaic li:nth-child(2n) {
  grid-column-start: 2;
}
.pf-mosaic li:hover {
  z-index: 20;
}

/* Geometric diamond frames – Titan palette */
.pf-mosaic li::before,
.pf-mosaic li::after {
  content: '';
  position: absolute;
  display: block;
  width: 100%;
  height: 100%;
  background-size: 50% 100%, 100% 100%;
  background-position: left, right;
  pointer-events: none;
  z-index: 0;
}

.pf-mosaic li::before {
  z-index: -10;
  clip-path: polygon(50% 0, 100% 50%, 50% 100%, 0 50%);
  -webkit-clip-path: polygon(50% 0, 100% 50%, 50% 100%, 0 50%);
  background-repeat: no-repeat;
  background-image:
    linear-gradient(-45deg, var(--m-gold) 53.5%, var(--m-navy) 53.5%, var(--m-navy) 60%, var(--m-gold) 60%),
    linear-gradient(45deg, var(--m-gold) 65.3%, var(--m-navy) 65.3%, var(--m-navy) 69.9%, var(--m-gold) 69.9%);
}

.pf-mosaic li::after {
  clip-path: polygon(100% 50%, 50% 100%, 0 50%, 20% 50%, 50% 80%, 80% 50%);
  -webkit-clip-path: polygon(100% 50%, 50% 100%, 0 50%, 20% 50%, 50% 80%, 80% 50%);
  background-repeat: no-repeat;
  background-image:
    linear-gradient(45deg, var(--m-gold) 40%, var(--m-navy) 40%),
    linear-gradient(-45deg, var(--m-gold) 30%, var(--m-navy) 30%);
}

/* Alternating color schemes (Titan variants) */
.pf-mosaic li:nth-child(2n)::before {
  background-image:
    linear-gradient(-45deg, var(--m-bronze) 53.5%, var(--m-deep) 53.5%, var(--m-deep) 60%, var(--m-bronze) 60%),
    linear-gradient(45deg, var(--m-bronze) 65.3%, var(--m-deep) 65.3%, var(--m-deep) 69.9%, var(--m-bronze) 69.9%);
}
.pf-mosaic li:nth-child(2n)::after {
  background-image:
    linear-gradient(45deg, var(--m-bronze) 40%, var(--m-deep) 40%),
    linear-gradient(-45deg, var(--m-bronze) 30%, var(--m-deep) 30%);
}
.pf-mosaic li:nth-child(5n)::before {
  background-image:
    linear-gradient(-45deg, var(--m-navy) 53.5%, var(--m-gold) 53.5%, var(--m-gold) 60%, var(--m-navy) 60%),
    linear-gradient(45deg, var(--m-navy) 65.3%, var(--m-gold) 65.3%, var(--m-gold) 69.9%, var(--m-navy) 69.9%);
}
.pf-mosaic li:nth-child(5n)::after {
  background-image:
    linear-gradient(45deg, var(--m-navy) 40%, var(--m-gold) 40%),
    linear-gradient(-45deg, var(--m-navy) 30%, var(--m-gold) 30%);
}
.pf-mosaic li:nth-child(7n)::before,
.pf-mosaic li:nth-child(7n-4)::before {
  background-image:
    linear-gradient(-45deg, var(--m-deep) 53.5%, var(--m-cream) 53.5%, var(--m-cream) 60%, var(--m-deep) 60%),
    linear-gradient(45deg, var(--m-deep) 65.3%, var(--m-cream) 65.3%, var(--m-cream) 69.9%, var(--m-deep) 69.9%);
}
.pf-mosaic li:nth-child(7n)::after,
.pf-mosaic li:nth-child(7n-4)::after {
  background-image:
    linear-gradient(45deg, var(--m-deep) 40%, var(--m-cream) 40%),
    linear-gradient(-45deg, var(--m-deep) 30%, var(--m-cream) 30%);
}
.pf-mosaic li:nth-child(9n)::before,
.pf-mosaic li:nth-child(9n-5)::before {
  background-image:
    linear-gradient(-45deg, var(--m-cream) 53.5%, var(--m-bronze) 53.5%, var(--m-bronze) 60%, var(--m-cream) 60%),
    linear-gradient(45deg, var(--m-cream) 65.3%, var(--m-bronze) 65.3%, var(--m-bronze) 69.9%, var(--m-cream) 69.9%);
}
.pf-mosaic li:nth-child(9n)::after,
.pf-mosaic li:nth-child(9n-5)::after {
  background-image:
    linear-gradient(45deg, var(--m-cream) 40%, var(--m-bronze) 40%),
    linear-gradient(-45deg, var(--m-cream) 30%, var(--m-bronze) 30%);
}

/* Book cover image – clean lift + rotate (no rotateY/X = no half-back clipping) */
.pf-mosaic li img {
  position: absolute;
  width: 43%;
  left: 50%;
  top: 50%;
  transform: translateX(-50%) translateY(-60%);
  box-shadow: 5px -5px 10px rgba(0, 0, 0, 0.3);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  border-radius: 2px;
  z-index: 2;
}
.pf-mosaic li:hover img {
  transform: translateX(-40%) translateY(-70%) rotateZ(25deg);
  box-shadow: 12px 8px 24px rgba(0, 0, 0, 0.45);
  z-index: 30;
}

/* Entrance animation class (JS adds) */
.pf-mosaic li.mosaic-in {
  animation: mosaicReveal 0.7s cubic-bezier(0.22, 1, 0.36, 1) both;
}
@keyframes mosaicReveal {
  from {
    opacity: 0;
    transform: scale(0.6) translateY(40px);
  }
  to {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
}

/* Mosaic responsive columns (from your original, refined) */
@media (min-width: 450px) {
  .pf-mosaic { margin: 170px 20px 90px; }
}
@media (min-width: 600px) {
  :root { --columns: 5; }
  .pf-mosaic li:nth-child(2n) { grid-column-start: auto; }
  .pf-mosaic li:nth-child(4n-1) { grid-column-start: 2; }
}
@media (min-width: 900px) {
  :root { --columns: 7; }
  .pf-mosaic li:nth-child(4n-1) { grid-column-start: auto; }
  .pf-mosaic li:nth-child(6n-2) { grid-column-start: 2; }
}
@media (min-width: 1200px) {
  :root { --columns: 9; }
  .pf-mosaic li:nth-child(6n-2) { grid-column-start: auto; }
  .pf-mosaic li:nth-child(8n-3) { grid-column-start: 2; }
}
@media (min-width: 1500px) {
  :root { --columns: 11; }
  .pf-mosaic li:nth-child(8n-3) { grid-column-start: auto; }
  .pf-mosaic li:nth-child(10n-4) { grid-column-start: 2; }
}
@media (min-width: 1800px) {
  :root { --columns: 13; }
  .pf-mosaic li:nth-child(10n-4) { grid-column-start: auto; }
  .pf-mosaic li:nth-child(12n-5) { grid-column-start: 2; }
}

/* =========================================================
   STATS + CTA
   ========================================================= */


.pf-cta {
  background: white;
  padding: 80px 0;
}
.pf-cta-title {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: clamp(1.7rem, 3.5vw, 2.4rem);
  color: var(--tp-navy);
  margin-bottom: 12px;
}
.pf-cta-sub {
  color: var(--tp-text);
  font-size: 1.1rem;
  margin-bottom: 28px;
}
.pf-cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  justify-content: center;
}

.pf-cta .btn-pf-outline-light {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: transparent;
  color: var(--tp-navy) !important;
  font-weight: 600;
  padding: 14px 28px;
  border-radius: 8px;
  border: 2px solid var(--tp-gold);
  text-decoration: none;
  transition: all 0.25s;
}
.pf-cta .btn-pf-outline-light:hover {
  background: var(--tp-navy);
  color: white !important;
}


/* =========================================================
   Responsive
   ========================================================= */
@media (max-width: 991.98px) {
  .pf-hero { min-height: auto; padding: 110px 0 70px; }
  .float-book { opacity: 0.5; }
  .fb-4, .fb-5 { display: none; }
  .pf-shelf-outer { padding: 0 48px; }
}
@media (max-width: 575.98px) {
  .pf-hero-actions { flex-direction: column; align-items: stretch; }
  .btn-pf-primary, .btn-pf-outline { text-align: center; }
  .shelf-book { flex: 0 0 120px; }
  .shelf-book-3d { width: 110px; height: 158px; }
  .pf-shelf-outer { padding: 0 40px; }
  .pf-shelf-arrow { width: 40px; height: 40px; }
}

/* Carousel Container & Track */
#shelfStage {
    overflow: hidden;
    cursor: grab;
    position: relative;
}

#shelfTrack {
    display: flex;
    flex-wrap: nowrap;
    gap: 16px; /* Spacing between books */
    transition: transform 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

/* Navigation Buttons */
#shelfPrev, #shelfNext {
    position: absolute;
    z-index: 5;
    transition: all 0.3s ease;
    cursor: pointer;
    background-color: rgba(255, 255, 255, 0.9);
    border: 1px solid #ddd;
    border-radius: 50%;
    width: 46px;
    height: 46px;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Hover and Click Animations */
#shelfPrev:hover, #shelfNext:hover {
    transform: scale(1.1);
    background-color: #fff;
    box-shadow: 0 4px 10px rgba(0,0,0,0.15);
}

#shelfPrev:active, #shelfNext:active {
    transform: scale(0.95);
}

[type=button]:not(:disabled) {
  box-shadow: rgba(0, 0, 0, 0.1) 0px 2px 5px;
}

#shelfNext {
  transition: background-color 0.3s, transform 0.2s;
  border-radius: 50%;
  background-color: rgba(255, 255, 255, 0.8);
  border: 1px solid rgb(221, 221, 221);
  box-shadow: rgba(0, 0, 0, 0.1) 0px 2px 5px;
}

.pf-shelf-track {
  gap: 16px;
}