/* The AGI Chronicles — design language from the FSG jacket:
   pitch black ground, transitional serif, iridescent prism sheen,
   chromatic-aberration ghosting as the signature element. */

:root {
  --black: #050506;
  --ink: #ece8e0;
  --dim: #9b968c;
  --faint: rgba(236, 232, 224, 0.14);
  --blue: #8fd0f8;
  --pink: #f7b3cd;
  --yellow: #f2e468;
  --red: #ff4438;
  --deep: #3b4fd8;
  --prism: linear-gradient(100deg, var(--blue) 0%, #f3ead8 32%, var(--pink) 55%, #f3ead8 72%, var(--yellow) 100%);
  --serif: "Newsreader", Georgia, "Times New Roman", serif;
  --text: "Literata", Georgia, "Times New Roman", serif;
  --sans: "Archivo", -apple-system, "Helvetica Neue", sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  background: var(--black);
  color: var(--ink);
  font-family: var(--text);
  font-size: 1.0625rem;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

::selection { background: var(--pink); color: var(--black); }

a { color: var(--ink); text-underline-offset: 3px; text-decoration-thickness: 1px; text-decoration-color: var(--dim); }
a:hover { text-decoration-color: var(--pink); }

.skip-link {
  position: absolute; left: -999px; top: 0; z-index: 100;
  background: var(--ink); color: var(--black); padding: 0.6rem 1rem;
}
.skip-link:focus { left: 0; }

:focus-visible { outline: 2px solid var(--blue); outline-offset: 3px; }

/* ---------- prism type: the signature ---------- */

.prism, .prism-sm {
  background: var(--prism);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.prism {
  position: relative;
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(3rem, 8.5vw, 6.2rem);
  line-height: 0.98;
  letter-spacing: -0.015em;
  font-optical-sizing: auto;
}

/* chromatic-aberration ghosts, echoing the jacket's smeared letters */
.prism::before, .prism::after {
  content: attr(data-text);
  position: absolute;
  inset: 0;
  z-index: -1;
  background: none;
  -webkit-background-clip: initial;
  background-clip: initial;
  pointer-events: none;
}
.prism::before {
  color: var(--red);
  transform: translateY(-0.045em);
  filter: blur(7px);
  opacity: 0.5;
}
.prism::after {
  color: var(--deep);
  transform: translateY(0.06em);
  filter: blur(9px);
  opacity: 0.55;
}

@media (prefers-reduced-motion: no-preference) {
  .prism::before { animation: ghost-drift 9s ease-in-out infinite alternate; }
  .prism::after  { animation: ghost-drift-2 11s ease-in-out infinite alternate; }
  @keyframes ghost-drift   { from { transform: translateY(-0.045em); opacity: 0.42; } to { transform: translateY(-0.085em); opacity: 0.6; } }
  @keyframes ghost-drift-2 { from { transform: translateY(0.06em);  opacity: 0.45; } to { transform: translateY(0.1em);  opacity: 0.62; } }
}

.prism-sm {
  font-family: var(--serif);
  font-weight: 400;
  letter-spacing: -0.01em;
}

/* ---------- structure ---------- */

.eyebrow {
  font-family: var(--sans);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--dim);
}
.eyebrow em { font-style: normal; color: var(--ink); }

.section-title {
  font-family: var(--serif);
  font-size: clamp(1.9rem, 3.6vw, 2.7rem);
  font-weight: 400;
  margin-bottom: 1.2em;
  text-align: center;
}

section { padding: 6.5rem 1.5rem; max-width: 1120px; margin: 0 auto; }

/* ---------- nav ---------- */

.nav {
  position: sticky; top: 0; z-index: 50;
  display: flex; align-items: center; gap: 2rem;
  padding: 0.9rem 1.5rem;
  background: rgba(5, 5, 6, 0.82);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--faint);
}
.nav-wordmark {
  font-family: var(--serif);
  font-size: 1.15rem;
  text-decoration: none;
  white-space: nowrap;
}
.nav-links { display: flex; gap: 1.4rem; margin-left: auto; }
.nav-links a {
  font-family: var(--sans);
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--dim);
  text-decoration: none;
}
.nav-links a:hover { color: var(--ink); }
.nav-cta { margin-left: 0.4rem; }

@media (max-width: 860px) {
  .nav-links { display: none; }
  .nav-cta { margin-left: auto; }
}

/* ---------- buttons ---------- */

.btn {
  display: inline-flex; align-items: center; gap: 0.5rem;
  font-family: var(--sans);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  text-decoration: none;
  padding: 0.85rem 1.6rem;
  border-radius: 999px;
  cursor: pointer;
  transition: transform 0.18s ease, box-shadow 0.18s ease, background 0.18s ease;
}
.btn-solid {
  background: var(--ink);
  color: var(--black);
  border: none;
}
.btn-solid:hover {
  transform: translateY(-1px);
  box-shadow: 0 0 0 1px rgba(255, 68, 56, 0.55), 0 0 22px rgba(143, 208, 248, 0.35), 0 6px 24px rgba(247, 179, 205, 0.25);
}
.btn-ghost {
  background: transparent;
  color: var(--ink);
  border: 1px solid rgba(236, 232, 224, 0.35);
}
.btn-ghost:hover { border-color: var(--pink); transform: translateY(-1px); }
.nav-cta.btn { padding: 0.55rem 1.15rem; font-size: 0.72rem; }
.icon { width: 1.05em; height: 1.05em; }

/* ---------- hero ---------- */

.hero { padding-top: 5rem; padding-bottom: 5.5rem; }
.hero-inner {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 3.5rem;
  align-items: center;
}
.hero-copy .eyebrow { margin-bottom: 1.6rem; }
.hero-sub {
  font-family: var(--serif);
  font-size: clamp(1.2rem, 2.3vw, 1.55rem);
  font-weight: 300;
  color: var(--ink);
  line-height: 1.35;
  margin-top: 1.4rem;
  max-width: 30ch;
}
.hero-byline { margin-top: 1.3rem; font-size: 1.15rem; color: var(--dim); }
.hero-byline strong { color: var(--ink); font-weight: 500; }
.hero-pub {
  margin-top: 0.5rem;
  font-family: var(--sans);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  color: var(--dim);
}
.hero-ctas { display: flex; flex-wrap: wrap; gap: 0.9rem; margin-top: 2.2rem; }
.hero-prologue { margin-top: 1.3rem; }
.hero-prologue a {
  font-family: var(--sans);
  font-size: 0.85rem;
  letter-spacing: 0.05em;
  color: var(--dim);
}
.hero-prologue a:hover { color: var(--ink); text-decoration-color: var(--pink); }

.hero-cover { display: flex; justify-content: center; }
.cover-frame {
  position: relative;
  max-width: 340px;
}
.cover-frame::before {
  content: "";
  position: absolute;
  inset: -12%;
  background:
    radial-gradient(45% 45% at 30% 25%, rgba(59, 79, 216, 0.35), transparent 70%),
    radial-gradient(40% 40% at 75% 60%, rgba(255, 68, 56, 0.22), transparent 70%),
    radial-gradient(50% 50% at 55% 85%, rgba(247, 179, 205, 0.2), transparent 70%);
  filter: blur(30px);
  z-index: -1;
}
.cover-frame img {
  width: 100%; height: auto; display: block;
  border-radius: 4px;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.75), 0 0 0 1px rgba(236, 232, 224, 0.08);
  transition: transform 0.35s ease;
}
.cover-frame:hover img { transform: translateY(-6px) rotate(-0.6deg); }

@media (prefers-reduced-motion: no-preference) {
  .cover-frame { animation: cover-float 7s ease-in-out infinite alternate; }
  @keyframes cover-float { from { transform: translateY(0); } to { transform: translateY(-10px); } }
}

@media (max-width: 860px) {
  .hero-inner { grid-template-columns: 1fr; gap: 3rem; }
  .hero-cover { order: -1; }
  .cover-frame { max-width: 240px; }
  .hero-copy { text-align: center; }
  .hero-sub { margin-inline: auto; }
  .hero-ctas { justify-content: center; }
}

/* ---------- buy ---------- */

.buy { text-align: center; padding-top: 4rem; }
.buy-note { color: var(--dim); margin-top: -1.2rem; margin-bottom: 2.4rem; }
.retailers {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.9rem;
  max-width: 980px;
  margin: 0 auto;
}
@media (max-width: 900px) { .retailers { grid-template-columns: repeat(2, 1fr); max-width: 640px; } }
.retailer {
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 0.3rem;
  min-height: 4.6rem;
  padding: 1rem;
  font-family: var(--sans);
  font-size: 0.92rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-decoration: none;
  border: 1px solid var(--faint);
  border-radius: 6px;
  transition: border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
}
.retailer:hover {
  transform: translateY(-2px);
  border-color: transparent;
  box-shadow: 0 0 0 1px rgba(143, 208, 248, 0.7), 0 0 18px rgba(247, 179, 205, 0.3), 0 8px 24px rgba(0, 0, 0, 0.5);
}
.retailer .tag {
  font-size: 0.68rem;
  font-weight: 400;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--dim);
}
.buy-small { margin-top: 1.6rem; font-size: 0.95rem; color: var(--dim); }

@media (max-width: 640px) { .retailers { grid-template-columns: 1fr 1fr; } }

/* ---------- praise ---------- */

.quote-lead { max-width: 880px; margin: 0 auto 3.5rem; text-align: center; }
.quote-lead blockquote p {
  font-family: var(--serif);
  font-size: clamp(1.25rem, 2.6vw, 1.7rem);
  font-weight: 300;
  line-height: 1.5;
}
.quote-lead figcaption, .quote-card figcaption {
  margin-top: 1.1rem;
  font-family: var(--sans);
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--dim);
}
.quote-lead figcaption cite, .quote-card figcaption cite { font-style: normal; color: var(--ink); }

.quote-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.2rem;
}
.quote-card {
  border: 1px solid var(--faint);
  border-radius: 8px;
  padding: 1.8rem 1.5rem;
  display: flex; flex-direction: column; justify-content: space-between;
}
.quote-card blockquote p { font-size: 0.98rem; line-height: 1.65; }
.star-badge { display: block; margin-top: 0.3rem; color: var(--yellow); }

@media (max-width: 860px) { .quote-grid { grid-template-columns: 1fr; } }

/* ---------- book ---------- */

.book-body { max-width: 760px; margin: 0 auto; }
.book-lede {
  font-family: var(--serif);
  font-size: clamp(1.35rem, 2.8vw, 1.8rem);
  font-weight: 300;
  line-height: 1.4;
  text-align: center;
  margin-bottom: 2.6rem;
}
.book-copy p { margin-bottom: 1.4rem; }
.book-copy p:first-child::first-letter {
  font-size: 3.4em;
  line-height: 0.8;
  float: left;
  padding-right: 0.12em;
  padding-top: 0.08em;
  background: var(--prism);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.book-facts {
  display: grid;
  grid-template-columns: repeat(4, auto);
  justify-content: space-between;
  gap: 1.5rem;
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--faint);
}
.book-facts dt {
  font-family: var(--sans);
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--dim);
  margin-bottom: 0.3rem;
}
.book-facts dd { font-size: 1.1rem; }
@media (max-width: 640px) { .book-facts { grid-template-columns: 1fr 1fr; } }

/* ---------- author ---------- */

.author-inner {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 3rem;
  align-items: center;
  max-width: 980px;
  margin: 0 auto;
}
.author-photo img {
  width: 100%; height: auto; display: block;
  border-radius: 8px;
  box-shadow: 0 18px 48px rgba(0, 0, 0, 0.6), 0 0 0 1px rgba(236, 232, 224, 0.08);
}

.author-links {
  list-style: none;
  margin-top: 1.6rem;
  display: flex; flex-direction: column; gap: 0.55rem;
}
.author-links a {
  font-family: var(--sans);
  font-size: 0.85rem;
  letter-spacing: 0.04em;
  color: var(--dim);
}
.author-links a:hover { color: var(--ink); }
@media (max-width: 860px) {
  .author-inner { grid-template-columns: 1fr; }
  .author-photo { max-width: 420px; margin: 0 auto; }
}

/* ---------- newsletter ---------- */

.newsletter { padding-top: 3rem; }
.newsletter-card {
  position: relative;
  max-width: 680px;
  margin: 0 auto;
  padding: 3rem 2.5rem;
  text-align: center;
  border-radius: 12px;
  background: rgba(236, 232, 224, 0.03);
}
.newsletter-card::before {
  content: "";
  position: absolute; inset: 0;
  border-radius: 12px;
  padding: 1px;
  background: linear-gradient(120deg, rgba(143,208,248,0.6), rgba(247,179,205,0.5), rgba(242,228,104,0.5), rgba(59,79,216,0.6));
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  mask-composite: exclude;
  pointer-events: none;
}
.newsletter-card .section-title { margin-bottom: 0.6em; }
.newsletter-card p { color: var(--dim); max-width: 46ch; margin: 0 auto 1.6rem; }
.newsletter-card iframe { border: 0; border-radius: 6px; }

/* ---------- contact ---------- */

.contact-inner {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 3rem;
  max-width: 980px;
  margin: 0 auto;
}

.contact-fine { margin-top: 1rem; font-size: 0.95rem; color: var(--dim); }

.contact-form .field { margin-bottom: 1.1rem; }
.contact-form label {
  display: block;
  font-family: var(--sans);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--dim);
  margin-bottom: 0.4rem;
}
.contact-form input,
.contact-form select,
.contact-form textarea {
  width: 100%;
  background: rgba(236, 232, 224, 0.05);
  border: 1px solid var(--faint);
  border-radius: 6px;
  color: var(--ink);
  font-family: var(--text);
  font-size: 1rem;
  padding: 0.7rem 0.9rem;
  transition: border-color 0.2s ease;
}
.contact-form select { appearance: none; -webkit-appearance: none; background-image: linear-gradient(45deg, transparent 50%, var(--dim) 50%), linear-gradient(135deg, var(--dim) 50%, transparent 50%); background-position: calc(100% - 18px) 50%, calc(100% - 13px) 50%; background-size: 5px 5px; background-repeat: no-repeat; }
.contact-form input:focus,
.contact-form select:focus,
.contact-form textarea:focus { outline: none; border-color: var(--blue); }
.contact-form textarea { resize: vertical; }
.honeypot { position: absolute; left: -9999px; width: 1px; height: 1px; opacity: 0; }
.form-status { margin-top: 0.9rem; font-size: 0.95rem; color: var(--dim); min-height: 1.4em; }
.form-status.ok { color: var(--blue); }
.form-status.err { color: var(--red); }

@media (max-width: 860px) { .contact-inner { grid-template-columns: 1fr; gap: 2rem; } }

/* ---------- footer ---------- */

.footer {
  border-top: 1px solid var(--faint);
  padding: 3.5rem 1.5rem 4.5rem;
  text-align: center;
  font-size: 0.9rem;
  color: var(--dim);
}
.footer-wordmark { font-family: var(--serif); font-size: 1.5rem; margin-bottom: 0.8rem; display: inline-block; }
.footer p { margin-bottom: 0.5rem; }
.footer a { color: var(--dim); }
.footer a:hover { color: var(--ink); }

/* ---------- sticky mobile buy bar ---------- */

.sticky-buy {
  position: fixed;
  left: 50%; bottom: 1rem;
  transform: translate(-50%, 140%);
  z-index: 40;
  background: var(--ink);
  color: var(--black);
  font-family: var(--sans);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-decoration: none;
  padding: 0.8rem 1.4rem;
  border-radius: 999px;
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.6), 0 0 0 1px rgba(247, 179, 205, 0.4);
  transition: transform 0.3s ease;
  white-space: nowrap;
}
.sticky-buy em { font-style: italic; }
.sticky-buy.show { transform: translate(-50%, 0); }
@media (min-width: 861px) { .sticky-buy { display: none; } }

/* ---------- modal ---------- */

.modal-backdrop[hidden] { display: none; }

.modal-backdrop {
  position: fixed; inset: 0; z-index: 90;
  display: flex; align-items: center; justify-content: center;
  background: rgba(5, 5, 6, 0.7);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  padding: 1.5rem;
}
.modal {
  position: relative;
  width: 100%;
  max-width: 480px;
  background: #0b0b0d;
  border: 1px solid rgba(236, 232, 224, 0.16);
  border-radius: 12px;
  padding: 2.6rem 2.2rem 1.6rem;
  text-align: center;
  box-shadow: 0 0 60px rgba(59, 79, 216, 0.25), 0 30px 80px rgba(0, 0, 0, 0.8);
}
.modal .eyebrow { margin-bottom: 0.9rem; }
.modal h3 { font-family: var(--serif); font-size: 1.75rem; font-weight: 400; margin-bottom: 0.7rem; }
.modal p { color: var(--dim); margin-bottom: 1.4rem; }
.modal iframe { border: 0; border-radius: 6px; }
.modal-close {
  position: absolute; top: 0.8rem; right: 1rem;
  background: none; border: none;
  color: var(--dim);
  font-size: 1.6rem;
  cursor: pointer;
  line-height: 1;
}
.modal-close:hover { color: var(--ink); }
.modal-dismiss {
  display: block;
  margin: 0.9rem auto 0;
  background: none; border: none;
  font-family: var(--sans);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  color: var(--dim);
  text-decoration: underline;
  text-underline-offset: 3px;
  cursor: pointer;
}
.modal-dismiss:hover { color: var(--ink); }

/* ---------- reveal on scroll ---------- */

@media (prefers-reduced-motion: no-preference) {
  html.js .reveal { opacity: 0; transform: translateY(18px); transition: opacity 0.6s ease, transform 0.6s ease; }
  html.js .reveal.in { opacity: 1; transform: none; }
}