:root {
  --bg: #f7f4ee;
  --ink: #23211c;
  --ink-soft: #5c574c;
  --accent: #8a5a2b;
  --accent-ink: #6f4517;
  --card: #fffdf8;
  --rule: #dcd5c6;
  --hero-bg: #14130f;
  --hero-ink: #efe9dc;
  --hero-soft: #b3ab99;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #16150f;
    --ink: #e8e2d4;
    --ink-soft: #a49c8a;
    --accent: #d0a468;
    --accent-ink: #dfb87f;
    --card: #201e16;
    --rule: #37342a;
    --hero-bg: #0e0d0a;
    --hero-ink: #efe9dc;
    --hero-soft: #b3ab99;
  }
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--ink);
  font-family: Georgia, "Iowan Old Style", "Times New Roman", serif;
  line-height: 1.65;
  font-size: 17px;
}
.wrap { max-width: 960px; margin: 0 auto; padding: 0 24px; }

nav {
  position: sticky; top: 0; z-index: 10;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--rule);
}
nav .wrap { display: flex; align-items: baseline; justify-content: space-between; padding-top: 14px; padding-bottom: 14px; flex-wrap: wrap; gap: 8px; }
.brand { font-size: 1.05rem; letter-spacing: 0.14em; text-transform: uppercase; font-weight: bold; color: var(--ink); text-decoration: none; }
nav ul { list-style: none; display: flex; gap: 22px; flex-wrap: wrap; }
nav a { color: var(--ink-soft); text-decoration: none; font-size: 0.85rem; letter-spacing: 0.08em; text-transform: uppercase; }
nav a:hover { color: var(--accent-ink); }

header.hero { background: var(--hero-bg); color: var(--hero-ink); padding: 72px 0 80px; }
.hero-grid { display: grid; grid-template-columns: 300px 1fr; gap: 52px; align-items: center; }
@media (max-width: 760px) { .hero-grid { grid-template-columns: 1fr; text-align: center; } .hero-cover { margin: 0 auto; } }
.hero-cover { perspective: 1100px; }
.book-3d {
  position: relative; width: 300px; max-width: 80vw;
  transform-style: preserve-3d;
  transform: rotateY(-24deg);
  transition: transform 0.45s ease;
  margin: 0 auto;
}
.book-3d:hover { transform: rotateY(-10deg); }
.book-3d img {
  width: 100%; display: block; position: relative;
  border-radius: 2px 5px 5px 2px;
  transform: translateZ(16px);
  box-shadow: 0 24px 60px rgba(0,0,0,0.6);
}
.book-3d::before {
  /* page block on the fore-edge */
  content: ""; position: absolute; top: 1.2%; bottom: 1.2%;
  width: 32px; right: -16px;
  transform: rotateY(90deg);
  background: linear-gradient(90deg,
    #e9e4d8 0%, #f6f2e8 12%, #e5e0d3 24%, #f6f2e8 36%,
    #e5e0d3 48%, #f6f2e8 60%, #e5e0d3 72%, #f6f2e8 84%, #dcd6c7 100%);
  border-radius: 0 3px 3px 0;
}
.book-3d::after {
  /* back cover + ground shadow */
  content: ""; position: absolute; inset: 0;
  transform: translateZ(-16px);
  background: #191713;
  border-radius: 2px 5px 5px 2px;
  box-shadow: -18px 14px 50px 8px rgba(0,0,0,0.55);
}
.kicker { font-size: 0.78rem; letter-spacing: 0.22em; text-transform: uppercase; color: var(--hero-soft); margin-bottom: 14px; }
h1.book-title { font-size: clamp(2.2rem, 5vw, 3.4rem); line-height: 1.08; margin-bottom: 18px; font-weight: normal; }
.hero-tag { font-size: 1.15rem; font-style: italic; color: var(--hero-soft); margin-bottom: 26px; max-width: 34em; }
.cta-row { display: flex; gap: 14px; flex-wrap: wrap; }
@media (max-width: 760px) { .cta-row { justify-content: center; } }
.btn {
  display: inline-block; padding: 12px 26px; border-radius: 3px;
  text-decoration: none; font-size: 0.9rem; letter-spacing: 0.08em; text-transform: uppercase;
  border: 1px solid var(--accent); transition: opacity .15s;
}
.btn:hover { opacity: 0.85; }
.btn-primary { background: var(--accent); color: #fff; }
@media (prefers-color-scheme: dark) { .btn-primary { color: #14130f; } }
.btn-ghost { color: var(--hero-ink); border-color: var(--hero-soft); }
.btn-ghost-light { color: var(--ink); border-color: var(--accent); }
.avail-note { margin-top: 16px; font-size: 0.85rem; color: var(--hero-soft); }

section { padding: 64px 0; border-bottom: 1px solid var(--rule); }
h2 { font-size: 1.7rem; font-weight: normal; margin-bottom: 8px; }
.rule-word { font-size: 0.78rem; letter-spacing: 0.22em; text-transform: uppercase; color: var(--accent-ink); margin-bottom: 10px; }
.lede { font-size: 1.1rem; max-width: 44em; }
section p + p { margin-top: 1em; }
.prose { max-width: 44em; }
.prose p + p { margin-top: 1em; }

blockquote.pull {
  margin: 34px 0; padding-left: 22px; border-left: 3px solid var(--accent);
  font-size: 1.25rem; font-style: italic; color: var(--ink-soft); max-width: 36em;
}

.book-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 20px; margin-top: 34px; }
.book-card {
  background: var(--card); border: 1px solid var(--rule); border-radius: 4px;
  padding: 26px 24px; display: flex; flex-direction: column; gap: 8px;
  transition: transform .15s, box-shadow .15s;
}
a.book-card { text-decoration: none; color: inherit; }
a.book-card:hover { transform: translateY(-3px); box-shadow: 0 10px 30px rgba(0,0,0,0.12); }
.book-card .cover { margin: -26px -24px 14px; }
.book-card .cover img { width: 100%; display: block; border-radius: 4px 4px 0 0; }
.book-card .series { font-size: 0.72rem; letter-spacing: 0.18em; text-transform: uppercase; color: var(--accent-ink); }
.book-card h3 { font-size: 1.25rem; font-weight: normal; }
.book-card .hook { font-style: italic; color: var(--ink-soft); font-size: 0.95rem; }
.book-card .desc { font-size: 0.92rem; color: var(--ink-soft); }
.book-card .more { font-size: 0.8rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--accent-ink); margin-top: auto; padding-top: 10px; }

.about-grid { display: grid; grid-template-columns: 260px 1fr; gap: 44px; align-items: start; }
@media (max-width: 700px) { .about-grid { grid-template-columns: 1fr; } }
.author-photo-img { width: 100%; aspect-ratio: 4 / 5; object-fit: cover; border-radius: 4px; box-shadow: 0 10px 30px rgba(0,0,0,0.25); }
.author-photo {
  width: 100%; aspect-ratio: 4 / 5; border-radius: 4px; overflow: hidden;
  background: linear-gradient(160deg, #4a4436 0%, #23211c 70%);
  display: flex; align-items: flex-end; justify-content: center;
  position: relative;
}
.author-photo::after {
  content: ""; position: absolute; bottom: 0; width: 46%; height: 62%;
  background: #14130f; border-radius: 46% 46% 0 0 / 30% 30% 0 0;
  opacity: 0.85;
}
.author-photo span { position: absolute; top: 12px; right: 12px; font-size: 0.7rem; letter-spacing: 0.1em; text-transform: uppercase; color: rgba(255,255,255,0.35); }

details.faq {
  background: var(--card); border: 1px solid var(--rule); border-radius: 4px;
  padding: 20px 24px; max-width: 46em; margin-top: 24px;
}
details.faq summary { cursor: pointer; font-size: 1.05rem; color: var(--accent-ink); }
details.faq p { margin-top: 14px; color: var(--ink); font-size: 0.97rem; }

.contact-card { background: var(--card); border: 1px solid var(--rule); border-radius: 4px; padding: 30px; max-width: 44em; margin-top: 26px; }
.contact-card a { color: var(--accent-ink); }

footer { padding: 44px 0 60px; color: var(--ink-soft); font-size: 0.85rem; }
footer .wrap { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px; }

/* ---- Book detail pages ---- */
.book-page { padding: 60px 0 80px; }
.backlink { font-size: 0.8rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--accent-ink); text-decoration: none; }
.backlink:hover { text-decoration: underline; }
.detail-grid { display: grid; grid-template-columns: 300px 1fr; gap: 52px; align-items: start; margin-top: 30px; }
@media (max-width: 760px) { .detail-grid { grid-template-columns: 1fr; } .detail-cover { max-width: 300px; margin: 0 auto; } }
.detail-cover img { width: 100%; display: block; border-radius: 3px; box-shadow: 0 14px 40px rgba(0,0,0,0.35); }
.detail-series { font-size: 0.78rem; letter-spacing: 0.22em; text-transform: uppercase; color: var(--accent-ink); margin-bottom: 10px; }
h1.detail-title { font-size: clamp(2rem, 4.5vw, 2.9rem); font-weight: normal; line-height: 1.1; margin-bottom: 10px; }
.detail-hook { font-size: 1.2rem; font-style: italic; color: var(--ink-soft); margin-bottom: 24px; }
.detail-ctas { margin-top: 30px; display: flex; gap: 14px; flex-wrap: wrap; }
.series-note { margin-top: 40px; padding-top: 24px; border-top: 1px solid var(--rule); font-size: 0.95rem; color: var(--ink-soft); max-width: 44em; }
.series-note a { color: var(--accent-ink); }