:root {
  --ink: #f2ede6;
  --paper: #121110;
  --accent: #c9a45c;
  --line: #2c2824;
  --muted: #a59d92;
  --soft: #857d73;
  --body: #d6cfc5;
  --surface: #1c1a17;
  --raised: #24211d;
  --on-ink: #121110;
  --paper-clear: rgba(18, 17, 16, 0);
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: 'Poppins', sans-serif;
  background: var(--paper);
  color: var(--ink);
  line-height: 1.6;
}
img { max-width: 100%; }

/* Social pill (fixed top-right on every page) */
.social-links {
  position: fixed;
  top: 1rem;
  right: 1.25rem;
  z-index: 50;
  display: flex;
  gap: 1rem;
  background: rgba(28, 26, 23, 0.85);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  padding: 0.6rem 0.9rem;
  border-radius: 999px;
  border: 1px solid var(--line);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.35);
}
.social-links a {
  color: var(--soft);
  display: inline-flex;
  transition: color 0.15s ease, transform 0.15s ease;
}
.social-links a:hover {
  color: var(--ink);
  transform: translateY(-2px);
}
.social-links svg { width: 22px; height: 22px; }

/* Homepage header */
.site-header {
  text-align: center;
  padding: 4.5rem 1.5rem 1.5rem;
}
.wordmark {
  font-size: clamp(2rem, 5vw, 3rem);
  letter-spacing: 0.12em;
  font-weight: 600;
}
.wordmark-link { color: inherit; text-decoration: none; display: inline-block; outline: none; }
.wordmark-text {
  display: inline-block;
  transform: perspective(800px) rotateX(var(--rx, 0deg)) rotateY(var(--ry, 0deg)) scale(var(--s, 1));
  transition: transform 0.2s ease, text-shadow 0.2s ease;
  will-change: transform;
}
.wordmark-link:hover .wordmark-text,
.wordmark-link:focus-visible .wordmark-text {
  --s: 1.06;
  text-shadow: 0 12px 28px rgba(0, 0, 0, 0.75);
}
.wordmark-link:focus-visible .wordmark-text { outline: 2px solid var(--accent); outline-offset: 6px; border-radius: 4px; }
.tagline {
  margin: 0.75rem auto 0;
  max-width: 640px;
  color: var(--muted);
  font-size: 1.05rem;
}

/* Homepage genre rows */
.home {
  max-width: 1240px;
  margin: 0 auto;
  padding-bottom: 4rem;
}
.row { margin-top: 1.75rem; }
.row-title {
  font-size: 1.3rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  padding: 0 1.5rem;
}
.row-viewport { position: relative; }
.row-track {
  display: flex;
  gap: 1.25rem;
  overflow-x: auto;
  scroll-snap-type: x proximity;
  scroll-behavior: smooth;
  scroll-padding-left: 1.5rem;
  padding: 1rem 1.5rem 1.75rem;
  scrollbar-width: none;
}
.row-track::-webkit-scrollbar { display: none; }

.tile {
  flex: 0 0 auto;
  width: clamp(140px, 17vw, 200px);
  scroll-snap-align: start;
  text-decoration: none;
  color: var(--ink);
  outline: none;
}
.tile-cover {
  display: block;
  width: 100%;
  aspect-ratio: 2 / 3;
  object-fit: cover;
  border-radius: 8px;
  background: #fff;
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.5);
  transform: perspective(800px) rotateX(var(--rx, 0deg)) rotateY(var(--ry, 0deg)) scale(var(--s, 1));
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  will-change: transform;
}
.tile:hover .tile-cover,
.tile:focus-visible .tile-cover {
  --s: 1.06;
  box-shadow: 0 22px 44px rgba(0, 0, 0, 0.75);
}
.tile:focus-visible .tile-cover { outline: 2px solid var(--accent); outline-offset: 3px; }
.tile-title {
  display: block;
  margin-top: 0.7rem;
  font-size: 0.85rem;
  font-weight: 500;
  line-height: 1.35;
  text-align: center;
  opacity: 0;
  transform: translateY(-4px);
  transition: opacity 0.2s ease, transform 0.2s ease;
}
.tile:hover .tile-title,
.tile:focus-visible .tile-title { opacity: 1; transform: none; }
@media (hover: none) {
  .tile-title { opacity: 1; transform: none; }
}

/* Scroll cues: edge fades + arrows, only shown when a row actually has more to see */
.row-viewport::before,
.row-viewport::after {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  width: 4rem;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.2s ease;
  z-index: 2;
}
.row-viewport::before { left: 0; background: linear-gradient(to right, var(--paper), var(--paper-clear)); }
.row-viewport::after { right: 0; background: linear-gradient(to left, var(--paper), var(--paper-clear)); }
.row-viewport.can-left::before,
.row-viewport.can-right::after { opacity: 1; }
.row-arrow {
  position: absolute;
  top: 38%;
  z-index: 3;
  width: 2.75rem;
  height: 2.75rem;
  border-radius: 50%;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--ink);
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.5);
  font-size: 1.5rem;
  line-height: 1;
  cursor: pointer;
  display: none;
  align-items: center;
  justify-content: center;
  transition: transform 0.15s ease;
}
.row-arrow:hover { transform: scale(1.08); }
.row-arrow.prev { left: 0.6rem; }
.row-arrow.next { right: 0.6rem; }
.row-viewport.can-left .row-arrow.prev,
.row-viewport.can-right .row-arrow.next { display: flex; }

/* Book pages */
.top-nav {
  max-width: 1080px;
  margin: 0 auto;
  padding: 1.6rem 1.5rem 0;
}
.back-link {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  letter-spacing: 0.02em;
}
.back-link:hover { color: var(--ink); }
.book {
  max-width: 1080px;
  margin: 0 auto;
  padding: 2.5rem 1.5rem 4rem;
}
.book-hero {
  display: grid;
  grid-template-columns: minmax(220px, 360px) 1fr;
  gap: 3rem;
  align-items: start;
}
.book-info { min-width: 0; }
.book-cover {
  width: 100%;
  display: block;
  border-radius: 10px;
  background: #fff;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.6);
}
.book-genre {
  color: var(--accent);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 0.6rem;
}
.book-title {
  font-size: clamp(1.9rem, 4vw, 2.6rem);
  font-weight: 600;
  line-height: 1.2;
  margin-bottom: 0.4rem;
}
.book-subtitle {
  font-style: italic;
  color: var(--muted);
  margin-bottom: 1.5rem;
}
.book-desc {
  color: var(--body);
  font-size: 1rem;
  max-width: 640px;
}
.book-desc p { margin-bottom: 1rem; }
.about-page { max-width: 760px; }
.about-desc { font-size: 1.05rem; line-height: 1.75; margin-top: 1.25rem; }
.book-desc ul { margin: 0 0 1rem 1.2rem; }
.book-desc li { margin-bottom: 0.45rem; }
.book-desc h2 {
  font-size: 1rem;
  font-weight: 600;
  margin: 1.4rem 0 0.5rem;
  color: var(--ink);
}
.book-desc--serif {
  font-family: Georgia, 'Times New Roman', serif;
  font-size: 1.05rem;
}

/* Buttons */
.book-actions {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(190px, 100%), 1fr));
  gap: 0.75rem;
  max-width: 600px;
  margin-top: 1.75rem;
}
.buy-btn {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  background: var(--ink);
  color: var(--on-ink);
  text-decoration: none;
  padding: 0.8rem 1.4rem;
  border-radius: 6px;
  font-size: 0.95rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  line-height: 1.3;
  transition: opacity 0.15s ease, transform 0.15s ease;
}
.buy-btn:hover { opacity: 0.85; transform: translateY(-1px); }
.buy-btn .buy-where {
  font-size: 0.75rem;
  font-weight: 400;
  opacity: 0.75;
  margin-top: 0.15rem;
}
.preview-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  color: var(--accent);
  border: 1px solid var(--accent);
  padding: 0.75rem 1.4rem;
  border-radius: 6px;
  font-family: 'Poppins', sans-serif;
  font-size: 0.95rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease;
}
.preview-btn:hover { background: var(--accent); color: var(--on-ink); }

/* Email signup: the form sits just after the .signup box in the page so it can
   float (sticky) at the bottom of the screen until its spot inside the box arrives. */
:root { --dock-h: 3.75rem; }
.signup {
  margin: 3.5rem 1.5rem 0;
  text-align: center;
  padding: 3rem 1.5rem calc(4.5rem + var(--dock-h));
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 10px;
}
.book .signup { margin: 4rem 0 0; }
.home .signup-form { width: min(440px, calc(100% - 6rem)); }
.signup h2 {
  font-size: 1.35rem;
  font-weight: 600;
  margin-bottom: 0.6rem;
}
.signup p {
  color: var(--muted);
  max-width: 480px;
  margin: 0 auto;
  font-size: 0.95rem;
}
.signup-form {
  position: sticky;
  bottom: 1rem;
  z-index: 40;
  display: flex;
  gap: 0.4rem;
  width: min(440px, calc(100% - 3rem));
  height: var(--dock-h);
  margin: calc(-3rem - var(--dock-h)) auto 3rem;
  padding: 0.4rem;
  background: var(--raised);
  border: 1px solid var(--line);
  border-radius: 999px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.55);
}
.signup-form input[type="email"] {
  flex: 1;
  min-width: 0;
  padding: 0 1rem;
  border: none;
  border-radius: 999px;
  font-family: 'Poppins', sans-serif;
  font-size: 0.9rem;
  background: transparent;
  color: var(--ink);
  outline: none;
}
.signup-form input[type="email"]::placeholder { color: var(--soft); }
.signup-form:focus-within { border-color: var(--accent); }
.signup-form button {
  flex: 0 0 auto;
  padding: 0 1.25rem;
  border: none;
  background: var(--accent);
  color: var(--on-ink);
  border-radius: 999px;
  font-family: 'Poppins', sans-serif;
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
}
.signup-form button:hover { opacity: 0.85; }
.signup-form button:disabled { opacity: 0.6; cursor: default; }
/* Honeypot field for bots: kept out of sight and out of the tab order. */
.signup-form .hp { position: absolute; left: -9999px; width: 1px; height: 1px; opacity: 0; }
.signup-form.done { justify-content: center; align-items: center; border-color: var(--accent); }
.signup-msg { color: var(--ink); font-size: 0.9rem; font-weight: 500; text-align: center; padding: 0 1rem; }

footer {
  text-align: center;
  padding: 2.5rem 1.5rem 3rem;
  color: var(--soft);
  font-size: 0.85rem;
}
footer a { color: var(--soft); }

/* Page-flip preview modal */
.preview-modal {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease;
}
.preview-modal.open { opacity: 1; pointer-events: auto; }
.preview-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(20, 17, 14, 0.85);
}
.preview-dialog {
  position: relative;
  z-index: 1;
  max-width: 560px;
  width: 92vw;
  padding: 1.5rem 1.25rem 1.25rem;
  text-align: center;
}
.preview-title {
  color: #fff;
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 1.25rem;
  padding: 0 2.5rem;
}
.preview-close {
  position: absolute;
  top: -0.5rem;
  right: 0;
  width: 2.25rem;
  height: 2.25rem;
  border-radius: 50%;
  border: none;
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
  font-size: 1.4rem;
  line-height: 1;
  cursor: pointer;
}
.preview-close:hover { background: rgba(255, 255, 255, 0.25); }
.preview-stage {
  position: relative;
  perspective: 1800px;
  width: min(80vw, 380px);
  aspect-ratio: 2 / 3;
  margin: 0 auto;
}
.preview-page {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: contain;
  background: #fff;
  border-radius: 6px;
  box-shadow: 0 15px 40px rgba(0, 0, 0, 0.4);
}
.preview-page-base { z-index: 1; }
.preview-page-flip {
  z-index: 2;
  backface-visibility: hidden;
  transform-origin: left center;
  transition: transform 0.6s ease-in-out;
  transform: rotateY(0deg);
}
.preview-page-flip.flip-prev { transform-origin: right center; }
.preview-controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1.5rem;
  margin-top: 1.25rem;
}
.preview-nav {
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.3);
  color: #fff;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 50%;
  cursor: pointer;
  font-size: 1.1rem;
  transition: background 0.15s ease;
}
.preview-nav:hover:not(:disabled) { background: rgba(255, 255, 255, 0.25); }
.preview-nav:disabled { opacity: 0.3; cursor: default; }
.preview-counter { color: #cfc8bd; font-size: 0.9rem; min-width: 3.5rem; display: inline-block; }

@media (max-width: 480px) {
  .home .signup { margin-left: 1rem; margin-right: 1rem; }
  .home .signup-form { width: calc(100% - 4rem); }
  .book .signup-form { width: calc(100% - 2rem); }
  .signup-form input[type="email"] { padding: 0 0.75rem; }
  .signup-form button { padding: 0 1rem; }
}

@media (max-width: 700px) {
  .top-nav { padding-top: 4.6rem; }
  .book { padding-top: 1.5rem; }
  .book-hero { grid-template-columns: 1fr; gap: 2rem; }
  .book-cover { max-width: 280px; margin: 0 auto; }
  .book-info { text-align: center; }
  .book-desc { text-align: left; margin: 0 auto; }
  .book-actions { margin-left: auto; margin-right: auto; }
}

@media (prefers-reduced-motion: reduce) {
  .row-track { scroll-behavior: auto; }
  .tile-cover, .wordmark-text, .tile-title, .preview-page-flip, .buy-btn, .row-arrow { transition-duration: 1ms !important; }
}