/* ============================================
   ENTIQUITY — Design System
   Editorial bookstore aesthetic
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Cormorant+Garamond:ital,wght@0,300;0,400;0,500;0,600;0,700;1,400;1,500&family=Inter:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap');

:root {
  /* Palette */
  --parchment: #F5EFE3;
  --cream: #FAF6EE;
  --bone: #E8DFC9;
  --bone-line: #C9BCA0;
  --espresso: #1C1814;
  --ink: #2A2520;
  --slate: #6B645A;
  --oxblood: #6B2C26;
  --oxblood-deep: #4A1E1A;
  --gold: #8A6F3D;
  --gold-soft: #B89A5E;
  --moss: #4A5C3D;

  /* Type */
  --serif: 'Cormorant Garamond', 'Garamond', Georgia, serif;
  --sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --mono: 'JetBrains Mono', 'SF Mono', Consolas, monospace;

  /* Spacing */
  --gutter: 2rem;
  --max-width: 1320px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.6;
  color: var(--ink);
  background: var(--parchment);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; border: none; background: none; color: inherit; }

/* ============================================
   TYPOGRAPHY
   ============================================ */

.serif { font-family: var(--serif); }
.mono { font-family: var(--mono); font-size: 0.75rem; letter-spacing: 0.08em; text-transform: uppercase; }

h1, h2, h3, h4 {
  font-family: var(--serif);
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--espresso);
}

h1 { font-size: clamp(3rem, 7vw, 6.5rem); line-height: 0.95; font-weight: 400; }
h2 { font-size: clamp(2rem, 4vw, 3.5rem); line-height: 1.05; }
h3 { font-size: 1.75rem; line-height: 1.2; }
h4 { font-size: 1.25rem; line-height: 1.3; font-weight: 600; }

.eyebrow {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--oxblood);
  font-weight: 500;
}

.italic { font-style: italic; font-family: var(--serif); }
.deck { font-family: var(--serif); font-size: 1.5rem; font-style: italic; line-height: 1.4; color: var(--slate); font-weight: 300; }

/* ============================================
   LAYOUT
   ============================================ */

.container { max-width: var(--max-width); margin: 0 auto; padding: 0 var(--gutter); }
.container-wide { max-width: 1480px; margin: 0 auto; padding: 0 var(--gutter); }
.container-narrow { max-width: 920px; margin: 0 auto; padding: 0 var(--gutter); }

.section { padding: 6rem 0; }
.section-sm { padding: 3rem 0; }

.grid { display: grid; gap: 2rem; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-6 { grid-template-columns: repeat(6, 1fr); }

.flex { display: flex; }
.between { justify-content: space-between; }
.center { align-items: center; }
.gap-1 { gap: 0.5rem; }
.gap-2 { gap: 1rem; }
.gap-4 { gap: 2rem; }

.divider { height: 1px; background: var(--bone-line); margin: 0; border: none; }
.divider-thick { height: 2px; background: var(--espresso); }

/* ============================================
   HEADER
   ============================================ */

.topbar {
  background: var(--espresso);
  color: var(--bone);
  font-family: var(--mono);
  font-size: 0.65rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  padding: 0.6rem 0;
}

.topbar .container { display: flex; justify-content: space-between; align-items: center; gap: 2rem; }
.topbar .pulse { display: inline-block; width: 6px; height: 6px; background: var(--gold-soft); border-radius: 50%; margin-right: 0.5rem; animation: pulse 2s infinite; }
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.4; } }

.header {
  background: var(--parchment);
  border-bottom: 1px solid var(--bone-line);
  position: sticky;
  top: 0;
  z-index: 50;
}

.header-inner {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  padding: 1.5rem 0;
  gap: 2rem;
}

.nav-left, .nav-right { display: flex; align-items: center; gap: 2rem; }
.nav-right { justify-content: flex-end; }

.nav-link {
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  color: var(--ink);
  position: relative;
  padding: 0.25rem 0;
  transition: color 0.2s;
}
.nav-link:hover { color: var(--oxblood); }
.nav-link.active::after {
  content: '';
  position: absolute;
  left: 0; right: 0; bottom: -2px;
  height: 1px;
  background: var(--oxblood);
}

.brand {
  font-family: var(--serif);
  font-size: 2.25rem;
  font-weight: 500;
  letter-spacing: -0.02em;
  color: var(--espresso);
  text-align: center;
  line-height: 1;
}
.brand .ampersand { font-style: italic; color: var(--oxblood); font-weight: 400; }
.brand-sub {
  font-family: var(--mono);
  font-size: 0.55rem;
  letter-spacing: 0.3em;
  color: var(--slate);
  text-transform: uppercase;
  margin-top: 0.35rem;
  text-align: center;
}

.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px; height: 36px;
  border-radius: 50%;
  transition: background 0.2s;
  position: relative;
}
.icon-btn:hover { background: var(--bone); }
.icon-btn svg { width: 18px; height: 18px; stroke: var(--ink); stroke-width: 1.5; fill: none; }
.icon-btn .badge {
  position: absolute;
  top: 2px; right: 2px;
  background: var(--oxblood);
  color: var(--cream);
  font-size: 0.6rem;
  font-weight: 600;
  padding: 0.1rem 0.35rem;
  border-radius: 999px;
  font-family: var(--sans);
  letter-spacing: 0;
}

.subnav {
  background: var(--parchment);
  border-bottom: 1px solid var(--bone-line);
  padding: 0.85rem 0;
}
.subnav .container { display: flex; gap: 2rem; align-items: center; overflow-x: auto; }
.subnav-link {
  font-family: var(--serif);
  font-size: 1.05rem;
  font-style: italic;
  color: var(--slate);
  white-space: nowrap;
  transition: color 0.2s;
}
.subnav-link:hover { color: var(--oxblood); }
.subnav-link.active { color: var(--espresso); font-style: normal; font-weight: 500; }
.subnav-divider { width: 4px; height: 4px; background: var(--bone-line); border-radius: 50%; flex-shrink: 0; }

/* ============================================
   BUTTONS
   ============================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.95rem 1.75rem;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  border: 1px solid var(--espresso);
  background: transparent;
  color: var(--espresso);
  transition: all 0.2s;
  cursor: pointer;
}
.btn:hover { background: var(--espresso); color: var(--cream); }
.btn-primary { background: var(--espresso); color: var(--cream); }
.btn-primary:hover { background: var(--oxblood); border-color: var(--oxblood); color: var(--cream); }
.btn-oxblood { background: var(--oxblood); color: var(--cream); border-color: var(--oxblood); }
.btn-oxblood:hover { background: var(--oxblood-deep); border-color: var(--oxblood-deep); }
.btn-ghost { border-color: var(--bone-line); color: var(--ink); }
.btn-ghost:hover { background: var(--bone); color: var(--espresso); border-color: var(--bone-line); }
.btn-sm { padding: 0.55rem 1rem; font-size: 0.7rem; }
.btn-lg { padding: 1.1rem 2.25rem; font-size: 0.82rem; }

.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--oxblood);
  font-weight: 600;
  border-bottom: 1px solid var(--oxblood);
  padding-bottom: 0.2rem;
  transition: gap 0.2s;
}
.link-arrow:hover { gap: 0.85rem; }

/* ============================================
   BOOK CARDS / COVERS
   ============================================ */

.book-card { display: block; }
.book-cover-frame {
  position: relative;
  aspect-ratio: 2 / 3;
  overflow: hidden;
  background: var(--bone);
  margin-bottom: 1rem;
  transition: transform 0.4s ease;
  box-shadow: 0 1px 0 var(--bone-line), -2px 0 0 rgba(0,0,0,0.04);
}
.book-card:hover .book-cover-frame { transform: translateY(-4px); }
.book-cover-frame::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(0,0,0,0.18) 0%, transparent 6%, transparent 94%, rgba(0,0,0,0.06) 100%);
  pointer-events: none;
}

.book-meta { display: flex; justify-content: space-between; align-items: baseline; gap: 1rem; }
.book-title {
  font-family: var(--serif);
  font-size: 1.15rem;
  line-height: 1.2;
  color: var(--espresso);
  font-weight: 500;
  margin-bottom: 0.2rem;
}
.book-author {
  font-family: var(--serif);
  font-style: italic;
  font-size: 0.95rem;
  color: var(--slate);
  margin-bottom: 0.4rem;
}
.book-price {
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.05em;
  color: var(--ink);
  font-weight: 500;
  white-space: nowrap;
}
.book-tag {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.6rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  padding: 0.2rem 0.5rem;
  background: var(--cream);
  border: 1px solid var(--bone-line);
  color: var(--slate);
  margin-bottom: 0.5rem;
}
.book-tag.first { color: var(--oxblood); border-color: var(--oxblood); }
.book-tag.signed { color: var(--gold); border-color: var(--gold); }
.book-tag.rare { background: var(--espresso); color: var(--cream); border-color: var(--espresso); }

/* SVG book covers — generated patterns */
.cover { width: 100%; height: 100%; display: block; }

/* ============================================
   FOOTER
   ============================================ */

.footer {
  background: var(--espresso);
  color: var(--bone);
  padding: 5rem 0 2rem;
  margin-top: 6rem;
}
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1fr; gap: 3rem; margin-bottom: 4rem; }
.footer h4 { color: var(--cream); font-family: var(--serif); font-size: 1.4rem; margin-bottom: 1rem; font-weight: 400; }
.footer .eyebrow { color: var(--gold-soft); margin-bottom: 1rem; display: block; }
.footer ul { list-style: none; }
.footer li { margin-bottom: 0.5rem; }
.footer a { color: var(--bone); opacity: 0.75; font-size: 0.85rem; transition: opacity 0.2s; }
.footer a:hover { opacity: 1; color: var(--gold-soft); }

.newsletter-input {
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--bone);
  color: var(--cream);
  padding: 0.75rem 0;
  font-family: var(--sans);
  font-size: 0.9rem;
  width: 100%;
  outline: none;
}
.newsletter-input::placeholder { color: var(--slate); }
.newsletter-row { display: flex; gap: 1rem; align-items: center; border-bottom: 1px solid var(--bone); }
.newsletter-row .btn { border: none; padding: 0.75rem 0; color: var(--gold-soft); font-weight: 600; }
.newsletter-row .btn:hover { background: transparent; color: var(--cream); }

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 2rem;
  border-top: 1px solid rgba(232, 223, 201, 0.15);
  font-family: var(--mono);
  font-size: 0.65rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--slate);
}

/* ============================================
   UTILITIES
   ============================================ */

.text-center { text-align: center; }
.text-oxblood { color: var(--oxblood); }
.text-gold { color: var(--gold); }
.text-slate { color: var(--slate); }
.bg-cream { background: var(--cream); }
.bg-espresso { background: var(--espresso); color: var(--bone); }
.bg-bone { background: var(--bone); }

.mt-1 { margin-top: 0.5rem; } .mt-2 { margin-top: 1rem; } .mt-4 { margin-top: 2rem; } .mt-6 { margin-top: 3rem; } .mt-8 { margin-top: 4rem; }
.mb-1 { margin-bottom: 0.5rem; } .mb-2 { margin-bottom: 1rem; } .mb-4 { margin-bottom: 2rem; } .mb-6 { margin-bottom: 3rem; } .mb-8 { margin-bottom: 4rem; }

.section-head {
  display: flex;
  justify-content: space-between;
  align-items: end;
  border-bottom: 1px solid var(--bone-line);
  padding-bottom: 1.5rem;
  margin-bottom: 3rem;
}
.section-head h2 { max-width: 60%; }

.tag-row { display: flex; flex-wrap: wrap; gap: 0.5rem; }

/* Page header */
.page-head {
  padding: 5rem 0 4rem;
  border-bottom: 1px solid var(--bone-line);
}
.page-head .breadcrumbs {
  font-family: var(--mono);
  font-size: 0.65rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--slate);
  margin-bottom: 1.5rem;
}
.page-head .breadcrumbs a:hover { color: var(--oxblood); }
.page-head .breadcrumbs .sep { margin: 0 0.6rem; opacity: 0.5; }

/* Responsive */
@media (max-width: 900px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .grid-6 { grid-template-columns: repeat(3, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .nav-left, .nav-right { display: none; }
  .header-inner { grid-template-columns: 1fr auto 1fr; }
  .section { padding: 4rem 0; }
}
@media (max-width: 600px) {
  .grid-4, .grid-3 { grid-template-columns: 1fr 1fr; gap: 1.5rem; }
  .grid-6 { grid-template-columns: repeat(2, 1fr); }
  :root { --gutter: 1.25rem; }
  h1 { font-size: 2.75rem; }
}