/* ============================================================
   DESIGN TOKENS
============================================================ */
:root {
  --bg:         #06060a;
  --bg-2:       #0d0d14;
  --bg-3:       #111118;
  --gold:       #c8a96e;
  --gold-light: #e2c89a;
  --gold-dim:   #8a7248;
  --white:      #f5f3ef;
  --grey:       #9a97a0;
  --grey-dim:   #4a4852;
  --font-main:  'Montserrat', sans-serif;
  --font-serif: 'Cormorant Garamond', serif;
  --nav-h:      72px;
  --ease-out:   cubic-bezier(0.22, 1, 0.36, 1);
}

/* ============================================================
   RESET & BASE
============================================================ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  background: var(--bg);
  color: var(--white);
  font-family: var(--font-main);
  font-weight: 300;
  line-height: 1.7;
  overflow-x: hidden;
}
img { display: block; width: 100%; object-fit: cover; }
a   { color: inherit; text-decoration: none; }
ul  { list-style: none; }

/* Scrollbar */
::-webkit-scrollbar            { width: 4px; }
::-webkit-scrollbar-track      { background: var(--bg); }
::-webkit-scrollbar-thumb      { background: var(--gold-dim); border-radius: 2px; }

/* ============================================================
   UTILITY
============================================================ */
.gold  { color: var(--gold); }
.serif { font-family: var(--font-serif); }

.section-label {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 11px;
  letter-spacing: 4px;
  text-transform: uppercase;
  color: var(--gold);
  font-weight: 500;
}
.section-label::before {
  content: '';
  display: block;
  width: 28px;
  height: 1px;
  background: var(--gold);
}
.section-label.center { justify-content: center; }
.section-label.center::before { display: none; }

.reveal {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.9s var(--ease-out), transform 0.9s var(--ease-out);
}
.reveal.visible { opacity: 1; transform: none; }
.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.35s; }
.reveal-delay-4 { transition-delay: 0.5s; }

.divider {
  height: 1px;
  background: linear-gradient(to right, transparent, var(--gold-dim), transparent);
  margin: 0 72px;
}

/* ============================================================
   NAVIGATION
============================================================ */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 48px;
  transition: background 0.5s, backdrop-filter 0.5s;
}
.nav.scrolled {
  background: rgba(6,6,10,0.88);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(200,169,110,0.12);
}
.nav-logo {
  font-size: 20px;
  font-weight: 600;
  letter-spacing: 6px;
  text-transform: uppercase;
}
.nav-logo span { color: var(--gold); }

.nav-links { display: flex; gap: 36px; }
.nav-links a {
  font-size: 12px;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--grey);
  font-weight: 400;
  transition: color 0.3s;
  /* 44px min touch target via padding */
  padding: 14px 0;
}
.nav-links a:hover, .nav-links a.active { color: var(--white); }

.nav-cta {
  border: 1px solid var(--gold-dim);
  padding: 11px 22px;
  font-size: 12px;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--gold);
  font-weight: 500;
  transition: background 0.3s, color 0.3s;
  cursor: pointer;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}
.nav-cta:hover { background: var(--gold); color: var(--bg); }

/* Hamburger — 44×44 touch target */
.nav-hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 6px;
  cursor: pointer;
  width: 44px;
  height: 44px;
  align-items: center;
  flex-shrink: 0;
}
.nav-hamburger span {
  display: block;
  width: 22px;
  height: 1.5px;
  background: var(--white);
  border-radius: 1px;
  transition: transform 0.35s var(--ease-out), opacity 0.25s, width 0.3s;
  transform-origin: center;
}
/* Animate to X when open */
.nav-mobile-open .nav-hamburger span:nth-child(1) { transform: translateY(7.5px) rotate(45deg); }
.nav-mobile-open .nav-hamburger span:nth-child(2) { opacity: 0; width: 0; }
.nav-mobile-open .nav-hamburger span:nth-child(3) { transform: translateY(-7.5px) rotate(-45deg); }

/* ============================================================
   BUTTONS
============================================================ */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  background: var(--gold);
  color: var(--bg);
  padding: 14px 32px;
  min-height: 48px;
  font-size: 13px;
  font-family: var(--font-main);
  font-weight: 600;
  letter-spacing: 2px;
  text-transform: uppercase;
  cursor: pointer;
  transition: background 0.3s, transform 0.2s;
  border: none;
  -webkit-tap-highlight-color: transparent;
}
.btn-primary:hover { background: var(--gold-light); transform: translateY(-1px); }

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--white);
  font-size: 13px;
  font-weight: 400;
  letter-spacing: 2px;
  text-transform: uppercase;
  cursor: pointer;
  border-bottom: 1px solid rgba(255,255,255,0.3);
  padding: 4px 0 4px;
  min-height: 44px;
  transition: border-color 0.3s, color 0.3s;
  -webkit-tap-highlight-color: transparent;
}
.btn-secondary:hover { border-color: var(--gold); color: var(--gold); }

.btn-ghost {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  color: var(--gold);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 2px;
  text-transform: uppercase;
  cursor: pointer;
  border: 1px solid var(--gold-dim);
  padding: 13px 24px;
  min-height: 48px;
  transition: background 0.3s, color 0.3s;
  -webkit-tap-highlight-color: transparent;
}
.btn-ghost:hover { background: var(--gold); color: var(--bg); }

/* ============================================================
   HERO SCROLL HINT
============================================================ */
.hero-scroll-hint {
  position: absolute;
  bottom: 32px;
  right: 48px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  opacity: 0;
  animation: fadeUp 1s var(--ease-out) 1.6s forwards;
}
.hero-scroll-hint span {
  font-size: 10px;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--grey);
  writing-mode: vertical-rl;
}
.scroll-line {
  width: 1px;
  height: 48px;
  background: linear-gradient(to bottom, var(--gold), transparent);
  animation: scrollLine 2s ease-in-out infinite 2s;
}

/* ============================================================
   CTA SECTION
============================================================ */
.cta {
  padding: 140px 72px;
  background: var(--bg-2);
  text-align: center;
}
.cta-eyebrow {
  font-size: 11px;
  letter-spacing: 5px;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 24px;
}
.cta-heading {
  font-family: var(--font-serif);
  font-size: clamp(36px, 5vw, 72px);
  font-weight: 300;
  line-height: 1.1;
  margin-bottom: 20px;
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}
.cta-sub {
  font-size: 15px;
  color: var(--grey);
  max-width: 500px;
  margin: 0 auto 52px;
  line-height: 1.8;
}
.cta-form {
  display: flex;
  flex-direction: column;
  gap: 16px;
  max-width: 520px;
  margin: 0 auto;
}
.cta-form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.cta-input {
  width: 100%;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--grey-dim);
  padding: 16px 20px;
  font-family: var(--font-main);
  font-size: 14px;
  font-weight: 300;
  color: var(--white);
  outline: none;
  transition: border-color 0.3s;
}
.cta-input::placeholder { color: var(--grey); }
.cta-input:focus { border-color: var(--gold-dim); }
textarea.cta-input { resize: vertical; min-height: 120px; }
.cta-submit {
  background: var(--gold);
  color: var(--bg);
  border: none;
  padding: 16px 40px;
  font-family: var(--font-main);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 3px;
  text-transform: uppercase;
  cursor: pointer;
  transition: background 0.3s, transform 0.2s;
}
.cta-submit:hover { background: var(--gold-light); transform: translateY(-1px); }

/* ============================================================
   FOOTER
============================================================ */
.footer {
  padding: 64px 72px 40px;
  background: var(--bg);
  border-top: 1px solid rgba(74,72,82,0.3);
}
.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 56px;
}
.footer-brand-name {
  font-size: 18px;
  font-weight: 600;
  letter-spacing: 6px;
  text-transform: uppercase;
  margin-bottom: 16px;
}
.footer-brand-name span { color: var(--gold); }
.footer-tagline {
  font-size: 13px;
  color: var(--grey);
  line-height: 1.7;
  max-width: 240px;
}
.footer-col-title {
  font-size: 11px;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--gold);
  font-weight: 500;
  margin-bottom: 20px;
}
.footer-links { display: flex; flex-direction: column; gap: 12px; }
.footer-links a {
  font-size: 13px;
  color: var(--grey);
  transition: color 0.3s;
}
.footer-links a:hover { color: var(--white); }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 32px;
  border-top: 1px solid rgba(74,72,82,0.3);
}
.footer-copy { font-size: 12px; color: var(--grey-dim); letter-spacing: 0.5px; }
.footer-social { display: flex; gap: 20px; }
.footer-social a {
  font-size: 12px;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--grey-dim);
  transition: color 0.3s;
}
.footer-social a:hover { color: var(--gold); }

/* ============================================================
   ANIMATIONS
============================================================ */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: none; }
}
@keyframes scrollLine {
  0%   { transform: scaleY(0); transform-origin: top; opacity: 0; }
  50%  { transform: scaleY(1); transform-origin: top; opacity: 1; }
  100% { transform: scaleY(0); transform-origin: bottom; opacity: 0; }
}

/* ============================================================
   MOBILE MENU — slide-down overlay
============================================================ */
/* Mobile menu — compact dropdown (no scrolling needed) */
.nav-mobile-open .nav-links {
  display: flex !important;
  flex-direction: column;
  position: fixed;
  top: var(--nav-h);
  left: 0; right: 0;
  background: rgba(6,6,10,0.97);
  backdrop-filter: blur(20px);
  padding: 4px 0 12px;
  gap: 0;
  border-bottom: 1px solid rgba(200,169,110,0.15);
  box-shadow: 0 12px 40px rgba(0,0,0,0.6);
  z-index: 99;
  animation: menuSlideIn 0.28s var(--ease-out) forwards;
}
.nav-mobile-open .nav-links a {
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 2.5px;
  text-transform: uppercase;
  color: var(--grey);
  padding: 0 24px;
  height: 52px;
  display: flex;
  align-items: center;
  border-bottom: 1px solid rgba(74,72,82,0.2);
  transition: color 0.2s, background 0.2s;
}
.nav-mobile-open .nav-links li:last-child a { border-bottom: none; }
.nav-mobile-open .nav-links a:hover,
.nav-mobile-open .nav-links a.active { color: var(--gold); background: rgba(200,169,110,0.04); }

/* Lock body scroll when menu open */
body.menu-open { overflow: hidden; }

@keyframes menuSlideIn {
  from { opacity: 0; transform: translateY(-12px); }
  to   { opacity: 1; transform: none; }
}

/* ============================================================
   CTA SUBMIT — ensure touch target
============================================================ */
.cta-submit {
  min-height: 52px;
  -webkit-tap-highlight-color: transparent;
}

/* ============================================================
   RESPONSIVE — 1024px (tablet / large mobile)
============================================================ */
@media (max-width: 1024px) {
  .nav { padding: 0 24px; }
  .nav-logo { font-size: 18px; letter-spacing: 5px; }
  .nav-cta { display: none; }           /* hide CTA in nav; use menu instead */
  .nav-links { display: none; }
  .nav-hamburger { display: flex; }
  .hero-scroll-hint { right: 24px; bottom: 24px; }
  .divider { margin: 0 24px; }
  .cta { padding: 80px 24px; }
  .cta-form-row { grid-template-columns: 1fr; }
  .footer { padding: 48px 24px 32px; }
  .footer-top { grid-template-columns: 1fr 1fr; gap: 28px; margin-bottom: 40px; }
}

/* ============================================================
   RESPONSIVE — 600px (mobile)
============================================================ */
@media (max-width: 600px) {
  :root { --nav-h: 60px; }
  .nav-logo { font-size: 16px; letter-spacing: 4px; }
  /* Reduce reveal distance for smoother mobile animation */
  .reveal { transform: translateY(20px); }
  .hero-scroll-hint { display: none; }
  .divider { margin: 0 16px; }
  .section-label { font-size: 10px; letter-spacing: 3px; }
  .cta { padding: 64px 20px; }
  .cta-heading { font-size: clamp(28px, 7vw, 44px); }
  .cta-sub { font-size: 14px; margin-bottom: 36px; }
  .cta-input { padding: 14px 16px; font-size: 16px; /* prevent iOS zoom */ }
  .cta-submit { font-size: 12px; letter-spacing: 2px; }
  .footer { padding: 40px 20px 28px; }
  .footer-top { grid-template-columns: 1fr; gap: 28px; margin-bottom: 32px; }
  .footer-tagline { max-width: 100%; }
  .footer-bottom { flex-direction: column; gap: 16px; text-align: center; }
  .footer-social { flex-wrap: wrap; justify-content: center; gap: 16px; }
}

/* ============================================================
   RESPONSIVE — 480px (small phones)
============================================================ */
@media (max-width: 480px) {
  .nav { padding: 0 16px; }
  .btn-primary  { padding: 13px 24px; font-size: 12px; letter-spacing: 1.5px; width: 100%; justify-content: center; }
  .btn-ghost    { padding: 13px 20px; font-size: 11px; width: 100%; justify-content: center; }
  .btn-secondary { font-size: 12px; }
}

/* ============================================================
   DETAIL PAGE SHARED — mobile overrides
   (applies to orbit-28, nova-38, cosmos-48)
============================================================ */

/* Hero breadcrumb — hide on small screens */
@media (max-width: 600px) {
  .hero-breadcrumb { display: none; }
  .hero-series { font-size: 10px; letter-spacing: 3px; }
  .hero-model-sub { font-size: 12px; letter-spacing: 2px; }
  .hero-tagline { font-size: clamp(16px, 4vw, 22px); }
  .hero-actions { flex-direction: column; align-items: stretch; gap: 12px; }
}

/* Stats bar — stack to 2 cols on mobile, clean borders */
@media (max-width: 600px) {
  .stats-bar {
    grid-template-columns: 1fr 1fr !important;
    padding: 0 20px !important;
  }
  .stat-cell {
    padding: 24px 0;
    border-right: none !important;
    border-bottom: 1px solid rgba(74,72,82,0.4);
    position: relative;
  }
  /* right border on odd items only */
  .stat-cell:nth-child(odd) { border-right: 1px solid rgba(74,72,82,0.4) !important; }
  .stat-cell-num { font-size: 28px; }
  .stat-cell-label { font-size: 9px; }
  /* last row: no bottom border */
  .stats-bar .stat-cell:nth-last-child(-n+2) { border-bottom: none; }
}

/* Overview sections */
@media (max-width: 600px) {
  .overview          { padding: 56px 20px !important; }
  .overview-inner    { padding: 0; gap: 32px !important; }
  .overview-heading  { font-size: clamp(24px, 6vw, 38px); }
  .overview-body     { font-size: 14px; }
  .overview-actions  { flex-direction: column; gap: 12px; }
}

/* Gallery */
@media (max-width: 600px) {
  .gallery           { padding: 0 20px 56px !important; }
  .gallery-grid      { grid-template-columns: 1fr !important; }
  /* reset any span-2 / tall overrides */
  .gallery-item      { grid-column: auto !important; grid-row: auto !important; }
  .gallery-item img,
  .gallery-item.tall img,
  .gallery-item.wide img,
  .gallery-item.span2 img { aspect-ratio: 16/9 !important; height: auto !important; }
}

/* Features */
@media (max-width: 600px) {
  .features          { padding: 56px 20px !important; }
  .features-grid     { grid-template-columns: 1fr !important; }
  .feature-card      { padding: 28px 24px; }
  .feature-card-icon { font-size: 22px; margin-bottom: 14px; }
  .feature-card-title { font-size: 15px; }
  .feature-card-text  { font-size: 13px; }
}

/* Spec tabs + rows */
@media (max-width: 600px) {
  .specs             { padding: 56px 20px !important; }
  .specs-tabs        { overflow-x: auto; scrollbar-width: none; }
  .specs-tabs::-webkit-scrollbar { display: none; }
  .spec-tab          { white-space: nowrap; padding: 12px 16px; font-size: 10px; }
  .spec-row          { flex-direction: column; align-items: flex-start; gap: 4px; padding: 14px 0; }
  .spec-key          { font-size: 10px; }
  .spec-val          { text-align: left; color: var(--gold-light); font-size: 14px; }
}

/* Customization cards */
@media (max-width: 600px) {
  .custom            { padding: 56px 20px !important; }
  .custom-grid       { grid-template-columns: 1fr !important; }
  .custom-card       { padding: 32px 24px; }
  .custom-card-num   { font-size: 36px; }
  .custom-card-list li { font-size: 12px; }
}

/* Related models */
@media (max-width: 600px) {
  .related           { padding: 56px 20px !important; }
  .related-grid      { grid-template-columns: 1fr !important; }
  .related-name      { font-size: 26px; }
}

/* Interior details (nova-38) */
@media (max-width: 600px) {
  .interior          { padding: 56px 20px !important; }
  .interior-top      { gap: 28px !important; }
  .interior-details  { grid-template-columns: 1fr 1fr !important; gap: 2px; }
  .detail-item       { padding: 20px 16px; }
  .detail-name       { font-size: 12px; }
  .detail-desc       { font-size: 11px; }
}

/* Hospitality section (cosmos-48) */
@media (max-width: 600px) {
  .hospitality       { padding: 56px 20px !important; }
  .hosp-inner        { gap: 32px !important; }
  .hosp-heading      { font-size: clamp(24px, 6vw, 38px); }
  .hosp-body         { font-size: 14px; }
  .hosp-point-num    { font-size: 20px; }
  .hosp-point-text h4 { font-size: 14px; }
  .hosp-point-text p  { font-size: 12px; }
}

/* Twin module diagram (cosmos-48) */
@media (max-width: 600px) {
  .twin-module       { padding: 32px 20px !important; gap: 28px !important; }
  .twin-module-heading { font-size: clamp(22px, 5.5vw, 32px); }
  .module-diagram    { flex-direction: column; }
  .module-connector  { transform: rotate(90deg); align-self: center; padding: 4px 0; }
  .module-block-items span { font-size: 11px; }
}

/* Prestige ribbon (cosmos-48) */
@media (max-width: 600px) {
  .prestige-ribbon   { font-size: 10px; letter-spacing: 2px; padding: 12px 20px !important; }
}

/* Hero badge (nova-38) */
@media (max-width: 600px) {
  .hero-badge        { display: none; }
}