/* ==========================================================================
   AmericanXP — Quiet Luxury & Editorial Maritime Architecture
   Palette: Warm Limestone (#F7F5F0), Linen (#EFECE6), Maritime Ink (#0D1B2A),
            Nautical Teal (#0B4F6C), Brushed Bronze (#9E8256)
   ========================================================================== */

:root {
  --bg-limestone: #F7F5F0;
  --bg-linen: #EFECE6;
  --bg-card: #FFFFFF;
  --ink-primary: #0D1B2A;
  --ink-secondary: #4A5568;
  --ink-muted: #718096;
  --accent-bronze: #9E8256;
  --accent-bronze-light: #C5B393;
  --accent-teal: #0B4F6C;
  --border-hairline: #E2DDD5;
  --font-serif: 'Cormorant Garamond', Georgia, serif;
  --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  --max-width: 1360px;
  --header-height: 84px;
}

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

html {
  scroll-behavior: smooth;
  background-color: var(--bg-limestone);
  color: var(--ink-primary);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

body {
  background-color: var(--bg-limestone);
  overflow-x: hidden;
  padding-bottom: 72px; /* space for mobile bottom bar */
}

@media (min-width: 1024px) {
  body {
    padding-bottom: 0;
  }
}

/* Typography */
h1, h2, h3, h4, .serif {
  font-family: var(--font-serif);
  font-weight: 500;
  line-height: 1.15;
  letter-spacing: -0.01em;
  color: var(--ink-primary);
}

.eyebrow {
  font-family: var(--font-sans);
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.22em;
  color: var(--accent-bronze);
  display: block;
  margin-bottom: 0.75rem;
}

.mono {
  font-family: var(--font-mono);
  font-size: 0.82rem;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.2s ease, opacity 0.2s ease;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* Layout Containers */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

@media (min-width: 768px) {
  .container {
    padding: 0 3rem;
  }
}

.section-pad {
  padding: 4.5rem 0;
}

@media (min-width: 1024px) {
  .section-pad {
    padding: 6.5rem 0;
  }
}

/* Header & Navigation */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-height);
  background: rgba(247, 245, 240, 0.94);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-hairline);
}

.header-inner {
  max-width: var(--max-width);
  height: 100%;
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  cursor: pointer;
}

.brand-logo img {
  height: 52px;
  width: auto;
  object-fit: contain;
}

.desktop-nav {
  display: none;
  align-items: center;
  gap: 2.25rem;
}

@media (min-width: 1080px) {
  .desktop-nav {
    display: flex;
  }
}

.nav-link {
  font-size: 0.82rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-primary);
  cursor: pointer;
  padding: 0.35rem 0;
  border-bottom: 1.5px solid transparent;
}

.nav-link:hover,
.nav-link.active {
  color: var(--accent-bronze);
  border-bottom-color: var(--accent-bronze);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  padding: 0.8rem 1.5rem;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  border: 1px solid var(--ink-primary);
  background: var(--ink-primary);
  color: #FFFFFF;
  cursor: pointer;
  transition: all 0.25s ease;
}

.btn:hover {
  background: var(--accent-teal);
  border-color: var(--accent-teal);
}

.btn-outline {
  background: transparent;
  color: var(--ink-primary);
  border: 1px solid var(--border-hairline);
}

.btn-outline:hover {
  border-color: var(--ink-primary);
  background: var(--bg-linen);
  color: var(--ink-primary);
}

.btn-bronze {
  background: var(--accent-bronze);
  border-color: var(--accent-bronze);
  color: #FFFFFF;
}

.btn-bronze:hover {
  background: #846B43;
  border-color: #846B43;
}

/* Slide-Over 22-Page Directory Drawer */
.drawer-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(13, 27, 42, 0.45);
  backdrop-filter: blur(4px);
  z-index: 200;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.drawer-backdrop.open {
  opacity: 1;
  pointer-events: auto;
}

.index-drawer {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  width: 100%;
  max-width: 560px;
  background: var(--bg-limestone);
  z-index: 210;
  transform: translateX(100%);
  transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  display: flex;
  flex-direction: column;
  border-left: 1px solid var(--border-hairline);
}

.index-drawer.open {
  transform: translateX(0);
}

.drawer-header {
  padding: 1.5rem 2rem;
  border-bottom: 1px solid var(--border-hairline);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.drawer-body {
  padding: 2rem;
  overflow-y: auto;
  flex: 1;
}

.chapter-group {
  margin-bottom: 2.25rem;
}

.chapter-title {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent-bronze);
  padding-bottom: 0.6rem;
  margin-bottom: 0.75rem;
  border-bottom: 1px solid var(--border-hairline);
}

.drawer-links {
  list-style: none;
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.35rem;
}

.drawer-link {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  padding: 0.6rem 0.75rem;
  border-radius: 4px;
  cursor: pointer;
  transition: background 0.15s ease;
}

.drawer-link:hover,
.drawer-link.active {
  background: var(--bg-linen);
}

.drawer-link-num {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent-bronze);
  margin-right: 0.85rem;
}

.drawer-link-title {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-weight: 500;
  flex: 1;
}

.drawer-link-tag {
  font-size: 0.7rem;
  color: var(--ink-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* Grids & Cards */
.grid-2 {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
}

.grid-3 {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}

.grid-4 {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

@media (min-width: 768px) {
  .grid-2 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 1024px) {
  .grid-3 { grid-template-columns: repeat(3, 1fr); }
  .grid-4 { grid-template-columns: repeat(4, 1fr); }
}

.editorial-card {
  background: var(--bg-card);
  border: 1px solid var(--border-hairline);
  display: flex;
  flex-direction: column;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.editorial-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 18px 36px -18px rgba(13, 27, 42, 0.12);
}

.card-media {
  position: relative;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: var(--bg-linen);
}

.card-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}

.editorial-card:hover .card-media img {
  transform: scale(1.04);
}

.card-badge {
  position: absolute;
  top: 1rem;
  left: 1rem;
  background: rgba(247, 245, 240, 0.94);
  padding: 0.3rem 0.7rem;
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-primary);
}

.card-body {
  padding: 1.75rem;
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

/* Spec Tables */
.spec-table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.25rem 0;
  font-size: 0.88rem;
}

.spec-table tr {
  border-bottom: 1px solid var(--border-hairline);
}

.spec-table th {
  text-align: left;
  padding: 0.75rem 0.5rem;
  color: var(--ink-muted);
  font-weight: 500;
}

.spec-table td {
  text-align: right;
  padding: 0.75rem 0.5rem;
  font-weight: 600;
  color: var(--ink-primary);
}

/* Interactive APA Calculator */
.calc-panel {
  background: var(--bg-card);
  border: 1px solid var(--border-hairline);
  padding: 2.25rem;
}

.ledger-panel {
  background: var(--ink-primary);
  color: #FFFFFF;
  padding: 2.25rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.ledger-panel h3 {
  color: #FFFFFF;
}

.ledger-row {
  display: flex;
  justify-content: space-between;
  padding: 0.9rem 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.14);
  font-size: 0.92rem;
}

.range-slider {
  width: 100%;
  accent-color: var(--accent-bronze);
  margin: 0.75rem 0;
  cursor: pointer;
}

/* Conversational Brief (Page 12) */
.choice-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 1rem;
  margin: 1.25rem 0 2rem;
}

.choice-pill {
  padding: 1.15rem 1.25rem;
  border: 1px solid var(--border-hairline);
  background: var(--bg-card);
  cursor: pointer;
  text-align: left;
  transition: all 0.2s ease;
}

.choice-pill:hover {
  border-color: var(--accent-bronze);
}

.choice-pill.selected {
  border-color: var(--ink-primary);
  background: var(--ink-primary);
  color: #FFFFFF;
}

.choice-pill.selected .choice-sub {
  color: rgba(255, 255, 255, 0.75);
}

.choice-sub {
  font-size: 0.78rem;
  color: var(--ink-muted);
  margin-top: 0.25rem;
}

.input-field {
  width: 100%;
  padding: 0.9rem 1rem;
  border: 1px solid var(--border-hairline);
  background: var(--bg-card);
  font-family: var(--font-sans);
  font-size: 0.95rem;
  color: var(--ink-primary);
}

.input-field:focus {
  outline: none;
  border-color: var(--ink-primary);
}

/* Mobile Bottom Bar */
.mobile-bottom-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: 68px;
  background: rgba(247, 245, 240, 0.96);
  backdrop-filter: blur(12px);
  border-top: 1px solid var(--border-hairline);
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  z-index: 95;
}

@media (min-width: 1024px) {
  .mobile-bottom-bar {
    display: none;
  }
}

.mob-tab {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.2rem;
  font-size: 0.65rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--ink-secondary);
  background: none;
  border: none;
  cursor: pointer;
}

.mob-tab.active {
  color: var(--accent-bronze);
}

/* Mega Footer & SEO Architecture */
.site-footer {
  background: var(--ink-primary);
  color: #E2DDD5;
  padding: 5rem 0 3rem;
  margin-top: 4rem;
}

.site-footer h4 {
  color: #FFFFFF;
  font-size: 1.05rem;
  margin-bottom: 1.15rem;
}

.footer-link {
  display: block;
  font-size: 0.85rem;
  color: #A0AEC0;
  padding: 0.3rem 0;
  cursor: pointer;
}

.footer-link:hover {
  color: #FFFFFF;
}

.seo-matrix {
  margin-top: 3.5rem;
  padding-top: 2.5rem;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
}

.seo-tag {
  display: inline-block;
  font-size: 0.74rem;
  color: #CBD5E0;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.12);
  padding: 0.35rem 0.75rem;
  margin: 0.25rem;
  cursor: pointer;
  transition: all 0.2s ease;
}

.seo-tag:hover {
  background: var(--accent-bronze);
  color: #FFFFFF;
  border-color: var(--accent-bronze);
}

/* Mobile Responsive Enhancements */
@media (max-width: 768px) {
  .header-inner { padding: 0 1rem; }
  .brand-logo img { height: 40px; }
  .section-pad { padding: 3rem 0; }
  h1, .serif { font-size: 2.1rem !important; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr !important; gap: 1.5rem !important; }
  .calc-panel, .ledger-panel { padding: 1.25rem !important; }
  .index-drawer { max-width: 100% !important; }
}

/* Redesigned Menu & Mobile Navigation Adjustments */
@media (max-width: 1023px) {
  .desktop-nav { display: none !important; }
  .header-actions { gap: 0.5rem; }
}