/* ================================================================
   T.H. LARSEN PUBLISHING — Stylesheet
   Design: Literary / Penguin-inspired. Serif-led. Whitespace-rich.
   ================================================================ */

/* ----------------------------------------------------------------
   0. TOKENS & RESET
   ---------------------------------------------------------------- */
:root {
  --ink:       #0f1b2d;
  --parchment: #f5f0e8;
  --gold:      #c9a84c;
  --gold-dark: #a8872e;
  --muted:     #6b6560;
  --border:    rgba(15, 27, 45, 0.12);
  --border-light: rgba(245, 240, 232, 0.18);

  --font-display: 'Cormorant Garamond', Georgia, serif;
  --font-body:    'DM Sans', system-ui, sans-serif;

  --nav-h: 72px;
  --container: 1160px;
  --radius: 3px;

  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  font-size: 16px;
}

body {
  font-family: var(--font-body);
  background-color: var(--parchment);
  color: var(--ink);
  line-height: 1.7;
  overflow-x: hidden;
}

img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }

/* Visually hidden (screen-reader only) */
.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

/* ----------------------------------------------------------------
   1. LAYOUT UTILITIES
   ---------------------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: clamp(1.25rem, 5vw, 3rem);
}

.section {
  padding-block: clamp(4rem, 9vw, 8rem);
}

/* ----------------------------------------------------------------
   2. TYPOGRAPHY SCALE
   ---------------------------------------------------------------- */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 400;
  line-height: 1.15;
  letter-spacing: -0.01em;
}

p { max-width: 68ch; }

/* ----------------------------------------------------------------
   3. NAVIGATION
   ---------------------------------------------------------------- */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  height: var(--nav-h);
  transition: background 0.35s var(--ease-out), box-shadow 0.35s var(--ease-out);
}

.site-header.scrolled {
  background: var(--ink);
  box-shadow: 0 1px 0 rgba(201, 168, 76, 0.25);
}

.nav-inner {
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: clamp(1.25rem, 5vw, 3rem);
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

/* Logo */
.nav-logo {
  display: flex;
  flex-direction: column;
  line-height: 1;
  gap: 2px;
  transition: opacity 0.2s;
}
.nav-logo:hover { opacity: 0.75; }

.logo-name {
  font-family: var(--font-display);
  font-size: clamp(1.05rem, 2.2vw, 1.3rem);
  font-weight: 600;
  letter-spacing: 0.18em;
  color: var(--parchment);
}

.logo-sub {
  font-family: var(--font-body);
  font-size: 0.55rem;
  font-weight: 400;
  letter-spacing: 0.38em;
  text-transform: uppercase;
  color: var(--gold);
}

/* Nav links */
.nav-links {
  display: flex;
  list-style: none;
  gap: clamp(1.5rem, 3vw, 2.5rem);
  align-items: center;
}

.nav-link {
  font-family: var(--font-body);
  font-size: 0.8rem;
  font-weight: 400;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: rgba(245, 240, 232, 0.75);
  transition: color 0.2s;
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -3px; left: 0; right: 0;
  height: 1px;
  background: var(--gold);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.25s var(--ease-out);
}

.nav-link:hover { color: var(--parchment); }
.nav-link:hover::after { transform: scaleX(1); }

/* Hamburger (mobile) */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
}
.nav-toggle span {
  display: block;
  width: 24px;
  height: 1.5px;
  background: var(--parchment);
  transition: transform 0.3s, opacity 0.3s;
}

/* ----------------------------------------------------------------
   4. HERO
   ---------------------------------------------------------------- */
.hero {
  background-color: var(--ink);
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding-block: calc(var(--nav-h) + 4rem) 6rem;
  position: relative;
  overflow: hidden;
}

/* Subtle texture overlay */
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 50% 40%, rgba(201,168,76,0.06) 0%, transparent 70%),
    radial-gradient(ellipse 100% 100% at 50% 100%, rgba(201,168,76,0.04) 0%, transparent 60%);
  pointer-events: none;
}

.hero-inner {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.75rem;
}

.hero-eyebrow {
  font-family: var(--font-body);
  font-size: 0.72rem;
  font-weight: 400;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--gold);
  max-width: none;
}

.hero-headline {
  font-family: var(--font-display);
  font-size: clamp(3.5rem, 10vw, 8rem);
  font-weight: 300;
  line-height: 1.05;
  color: var(--parchment);
  letter-spacing: -0.02em;
}

.hero-headline em {
  font-style: italic;
  color: var(--gold);
}

.hero-sub {
  font-family: var(--font-body);
  font-size: clamp(0.9rem, 1.8vw, 1.1rem);
  font-weight: 300;
  color: rgba(245, 240, 232, 0.62);
  line-height: 1.7;
  max-width: 44ch;
}

.br-desktop { display: none; }
@media (min-width: 640px) { .br-desktop { display: inline; } }

/* Decorative rule beneath hero */
.hero-rule {
  position: absolute;
  bottom: 0; left: 50%; transform: translateX(-50%);
  width: 1px;
  height: 60px;
  background: linear-gradient(to bottom, var(--gold), transparent);
  opacity: 0.5;
}

/* ----------------------------------------------------------------
   5. BUTTONS
   ---------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-body);
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  border-radius: var(--radius);
  padding: 0.85em 2.1em;
  cursor: pointer;
  transition: background 0.22s, color 0.22s, border-color 0.22s, transform 0.15s;
  border: 1.5px solid transparent;
  text-decoration: none;
  white-space: nowrap;
}
.btn:active { transform: translateY(1px); }

/* Gold fill */
.btn--gold {
  background: var(--gold);
  color: var(--ink);
  border-color: var(--gold);
}
.btn--gold:hover {
  background: var(--gold-dark);
  border-color: var(--gold-dark);
}

/* Outline (dark bg context) */
.btn--outline {
  background: transparent;
  color: var(--ink);
  border-color: var(--ink);
}
.btn--outline:hover {
  background: var(--ink);
  color: var(--parchment);
}

/* Ghost (parchment bg — muted) */
.btn--ghost {
  background: transparent;
  color: var(--muted);
  border-color: var(--border);
}
.btn--ghost:hover {
  border-color: var(--ink);
  color: var(--ink);
}

/* Small variant */
.btn--sm {
  font-size: 0.72rem;
  padding: 0.65em 1.5em;
}

/* ----------------------------------------------------------------
   5b. FOCUS STATES (accessibility)
   ---------------------------------------------------------------- */
.btn:focus-visible,
.nav-link:focus-visible,
.nav-logo:focus-visible,
.footer-nav a:focus-visible,
.footer-legal a:focus-visible,
.nav-toggle:focus-visible,
.form-input:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 3px;
}

/* ----------------------------------------------------------------
   6. SECTION HEADERS
   ---------------------------------------------------------------- */
.section-header {
  margin-bottom: clamp(2.5rem, 5vw, 4rem);
  text-align: center;
}

.section-label {
  font-family: var(--font-body);
  font-size: 0.7rem;
  font-weight: 400;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--gold);
  max-width: none;
  display: block;
  margin-bottom: 0.75rem;
}
.section-label--light { color: rgba(201,168,76,0.85); }

.section-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4.5vw, 3.25rem);
  font-weight: 400;
  color: var(--ink);
}
.section-title--light { color: var(--parchment); }

/* ----------------------------------------------------------------
   7. CATALOGUE
   ---------------------------------------------------------------- */
.catalogue {
  background: var(--parchment);
}

/* Category block */
.category-block {
  margin-bottom: clamp(3.5rem, 7vw, 6rem);
}
.category-block:last-child { margin-bottom: 0; }

.category-heading {
  font-family: var(--font-body);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--muted);
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: clamp(1.75rem, 3vw, 2.5rem);
}

.category-heading::before,
.category-heading::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border);
}
.category-heading::before { display: none; }

.category-lang {
  display: inline-flex;
  align-items: center;
  font-size: 0.62rem;
  letter-spacing: 0.18em;
  color: var(--gold);
  border: 1px solid rgba(201,168,76,0.4);
  padding: 0.18em 0.6em;
  border-radius: 20px;
  flex-shrink: 0;
}

/* Book grid */
.book-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 280px), 1fr));
  gap: clamp(1.5rem, 3vw, 2.5rem);
}

.book-grid--two {
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 320px), 1fr));
}

/* Book card */
.book-card {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: box-shadow 0.3s var(--ease-out), transform 0.3s var(--ease-out);
}
.book-card:hover {
  box-shadow: 0 16px 48px rgba(15,27,45,0.14), 0 4px 12px rgba(15,27,45,0.08);
  transform: translateY(-3px) scale(1.02);
}

/* Book cover placeholder */
.book-cover {
  aspect-ratio: 3 / 4;
  display: flex;
  align-items: flex-end;
  padding: 1.5rem;
  position: relative;
  overflow: hidden;
  flex-shrink: 0;
}

/* Cover colour palettes */
.book-cover--1 { background: linear-gradient(160deg, #1a2e4a 0%, #0f1b2d 55%, #1c2d1c 100%); }
.book-cover--2 { background: linear-gradient(160deg, #2d1a0f 0%, #1a0f0a 55%, #2d2210 100%); }
.book-cover--3 { background: linear-gradient(160deg, #1a1a2d 0%, #0f0f1b 55%, #2a1a2d 100%); }
.book-cover--4 { background: linear-gradient(160deg, #0d2233 0%, #0a1a28 55%, #1a0d0d 100%); }
.book-cover--5 { background: linear-gradient(160deg, #1a2a1a 0%, #0d1a1a 55%, #0f1b2d 100%); }
.book-cover--6 { background: linear-gradient(160deg, #2a1e0f 0%, #1a1309 55%, #2a2010 100%); }
.book-cover--7 { background: linear-gradient(160deg, #0f1f2d 0%, #0a1520 55%, #1a1a2d 100%); }

/* Decorative cover elements */
.book-cover::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--gold), transparent);
  opacity: 0.7;
}

.book-cover::after {
  content: '';
  position: absolute;
  inset: 0;
  background:
    repeating-linear-gradient(
      0deg,
      transparent,
      transparent 40px,
      rgba(245,240,232,0.02) 40px,
      rgba(245,240,232,0.02) 41px
    );
  pointer-events: none;
}

.cover-inner {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.cover-series {
  font-family: var(--font-body);
  font-size: 0.6rem;
  font-weight: 400;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gold);
  opacity: 0.8;
}

.cover-title {
  font-family: var(--font-display);
  font-size: clamp(1.3rem, 3vw, 1.65rem);
  font-weight: 500;
  line-height: 1.15;
  color: var(--parchment);
}

/* Book info pane */
.book-info {
  padding: 1.25rem 1.5rem 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  flex: 1;
}

.book-meta {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  flex-wrap: wrap;
}

.tag {
  font-family: var(--font-body);
  font-size: 0.62rem;
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--muted);
}

.badge {
  font-family: var(--font-body);
  font-size: 0.6rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 0.22em 0.7em;
  border-radius: 20px;
}

.badge--available {
  background: rgba(201, 168, 76, 0.12);
  color: var(--gold-dark);
  border: 1px solid rgba(201, 168, 76, 0.35);
}

.badge--soon {
  background: rgba(107, 101, 96, 0.08);
  color: var(--muted);
  border: 1px solid rgba(107, 101, 96, 0.22);
}

.book-title {
  font-family: var(--font-display);
  font-size: clamp(1.1rem, 2.2vw, 1.3rem);
  font-weight: 500;
  line-height: 1.25;
  color: var(--ink);
  margin-top: 0.15rem;
}
.book-title em { font-weight: 300; color: var(--muted); font-size: 0.9em; }

.book-series {
  font-family: var(--font-body);
  font-size: 0.72rem;
  font-weight: 400;
  letter-spacing: 0.08em;
  color: var(--gold-dark);
  max-width: none;
}

.book-subtitle {
  font-family: var(--font-body);
  font-size: 0.84rem;
  font-weight: 300;
  color: var(--muted);
  line-height: 1.55;
  flex: 1;
}

.book-note {
  font-family: var(--font-body);
  font-size: 0.72rem;
  font-style: italic;
  color: var(--gold-dark);
  max-width: none;
}

.book-info .btn {
  align-self: flex-start;
  margin-top: auto;
  padding-top: 0.75rem;
}

/* ----------------------------------------------------------------
   8. ABOUT
   ---------------------------------------------------------------- */
.about {
  background: #f0ebe2;  /* slightly deeper than parchment for contrast */
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.about-inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(2.5rem, 5vw, 5rem);
  align-items: start;
}

@media (min-width: 768px) {
  .about-inner {
    grid-template-columns: auto 1fr;
  }
}

.about-portrait {
  display: flex;
  justify-content: center;
}

.portrait-placeholder {
  width: clamp(120px, 18vw, 200px);
  aspect-ratio: 1;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--ink) 0%, #1e3050 100%);
  border: 3px solid rgba(201,168,76,0.35);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.portrait-placeholder span {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 4vw, 2.2rem);
  font-weight: 400;
  color: var(--gold);
  letter-spacing: 0.1em;
}

.about-text .section-title {
  margin-bottom: 1.5rem;
}

.about-bio {
  font-size: clamp(0.9rem, 1.6vw, 1rem);
  color: #3a3430;
  line-height: 1.8;
  margin-bottom: 1rem;
  max-width: 62ch;
}
.about-bio:last-child { margin-bottom: 0; }

/* ----------------------------------------------------------------
   9. EMAIL SIGNUP
   ---------------------------------------------------------------- */
.signup {
  background: var(--ink);
  position: relative;
  overflow: hidden;
}

.signup::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 70% 80% at 100% 50%, rgba(201,168,76,0.05) 0%, transparent 70%);
  pointer-events: none;
}

.signup-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(2.5rem, 5vw, 4rem);
  align-items: start;
}

@media (min-width: 768px) {
  .signup-inner {
    grid-template-columns: 1fr 1fr;
    align-items: center;
  }
}

.signup-text .section-title--light {
  margin-top: 0.5rem;
  margin-bottom: 1rem;
  font-size: clamp(1.6rem, 3.5vw, 2.5rem);
}

.signup-sub {
  font-size: 0.9rem;
  color: rgba(245, 240, 232, 0.55);
  line-height: 1.75;
  max-width: 44ch;
}

.signup-form {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.form-row {
  display: flex;
  gap: 0;
  border: 1.5px solid rgba(245,240,232,0.15);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color 0.2s;
}
.form-row:focus-within {
  border-color: var(--gold);
}

.form-input {
  flex: 1;
  min-width: 0;
  background: rgba(245,240,232,0.05);
  border: none;
  outline: none;
  padding: 0.9em 1.2em;
  font-family: var(--font-body);
  font-size: 0.9rem;
  color: var(--parchment);
}

.form-input::placeholder {
  color: rgba(245,240,232,0.35);
}

.form-row .btn--gold {
  border-radius: 0;
  border: none;
  flex-shrink: 0;
}

.form-note {
  font-family: var(--font-body);
  font-size: 0.7rem;
  color: rgba(245,240,232,0.3);
  max-width: none;
}

.form-success {
  font-family: var(--font-body);
  font-size: 0.85rem;
  color: var(--gold);
  font-style: italic;
  max-width: none;
}

/* ----------------------------------------------------------------
   10. FOOTER
   ---------------------------------------------------------------- */
.site-footer {
  background: #090f18;
  border-top: 1px solid rgba(201,168,76,0.2);
  padding-block: 3rem;
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
  text-align: center;
}

@media (min-width: 640px) {
  .footer-inner {
    flex-direction: row;
    justify-content: space-between;
    text-align: left;
  }
}

.nav-logo--footer .logo-name { font-size: 1.05rem; }

.footer-tagline {
  font-family: var(--font-display);
  font-size: 0.8rem;
  font-style: italic;
  color: rgba(245,240,232,0.3);
  margin-top: 0.3rem;
  max-width: none;
}

.footer-nav {
  display: flex;
  gap: 2rem;
  flex-wrap: wrap;
  justify-content: center;
}

.footer-nav a {
  font-family: var(--font-body);
  font-size: 0.72rem;
  font-weight: 400;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: rgba(245,240,232,0.45);
  transition: color 0.2s;
}
.footer-nav a:hover { color: var(--gold); }

.footer-legal {
  font-family: var(--font-body);
  font-size: 0.72rem;
  color: rgba(245,240,232,0.25);
  max-width: none;
}
.footer-legal a {
  color: rgba(245,240,232,0.35);
  transition: color 0.2s;
}
.footer-legal a:hover { color: var(--gold); }

/* ----------------------------------------------------------------
   11. RESPONSIVE — MOBILE NAV
   ---------------------------------------------------------------- */
@media (max-width: 640px) {
  .nav-toggle {
    display: flex;
  }

  .nav-links {
    position: fixed;
    top: var(--nav-h);
    left: 0; right: 0;
    background: var(--ink);
    flex-direction: column;
    align-items: center;
    gap: 0;
    padding: 0;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s var(--ease-out), padding 0.4s var(--ease-out);
    border-bottom: 1px solid rgba(201,168,76,0.15);
  }

  .nav-links.open {
    max-height: 240px;
    padding-block: 1.5rem;
  }

  .nav-links li {
    width: 100%;
    text-align: center;
  }

  .nav-link {
    display: block;
    padding: 0.9rem 2rem;
    font-size: 0.85rem;
  }

  .nav-link::after { display: none; }
}

/* ----------------------------------------------------------------
   12. SCROLL ANIMATIONS
   ---------------------------------------------------------------- */
@media (prefers-reduced-motion: no-preference) {
  .book-card,
  .about-inner,
  .signup-inner > * {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s var(--ease-out), transform 0.6s var(--ease-out);
  }

  .book-card.visible,
  .about-inner.visible,
  .signup-inner > .visible {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Stagger cards */
.book-card:nth-child(2) { transition-delay: 0.08s; }
.book-card:nth-child(3) { transition-delay: 0.16s; }
.book-card:nth-child(4) { transition-delay: 0.24s; }

/* ----------------------------------------------------------------
   13. PRINT
   ---------------------------------------------------------------- */
@media print {
  .site-header, .signup, .site-footer { display: none; }
  .hero { min-height: auto; padding: 2rem; }
}