/* ═══════════════════════════════════════
   BIGWIN BUILDSYS — DESIGN SYSTEM
   Midnight Luxe | Navy + Gold
═══════════════════════════════════════ */

:root {
  --navy:       #0a192f;
  --navy-deep:  #060f1e;
  --navy-mid:   #0d2240;
  --gold:       #D4AF37;
  --gold-light: #F1D279;
  --gold-dim:   #a8872a;
  --white:      #ffffff;
  --off-white:  #F8FAFC;
  --gray-100:   #f1f5f9;
  --gray-200:   #e2e8f0;
  --gray-400:   #94a3b8;
  --gray-600:   #475569;
  --gray-800:   #1e293b;
  --font-head:  'Montserrat', sans-serif;
  --font-body:  'Inter', sans-serif;
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --ease-smooth: cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

html { overflow-y: scroll; scroll-behavior: smooth; }

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

body {
  font-family: var(--font-body);
  background: var(--off-white);
  color: var(--gray-800);
  -webkit-font-smoothing: antialiased;
  margin: 0;
}

/* ── Noise Overlay ── */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='300' height='300'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.75' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='300' height='300' filter='url(%23n)' opacity='0.04'/%3E%3C/svg%3E");
  pointer-events: none;
  z-index: 9999;
  opacity: 0.06;
}

/* ── Typography ── */
h1,h2,h3,h4,h5,h6 { font-family: var(--font-head); }

.text-gold { color: var(--gold); }
.text-navy { color: var(--navy); }
.bg-navy   { background-color: var(--navy); }
.bg-gold   { background-color: var(--gold); }

.gradient-text-gold {
  background: linear-gradient(135deg, var(--gold) 0%, var(--gold-light) 60%, var(--gold) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ── Navbar ── */
.nav-glass {
  background: rgba(10, 25, 47, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(212, 175, 55, 0.15);
}
.nav-glass.scrolled {
  background: rgba(10, 25, 47, 0.97);
  box-shadow: 0 4px 32px rgba(0,0,0,0.3);
}
.nav-link {
  color: rgba(255,255,255,0.7);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  text-decoration: none;
  padding: 0.25rem 0;
  position: relative;
  transition: color 0.3s var(--ease-smooth);
}
.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0;
  width: 0; height: 1.5px;
  background: var(--gold);
  transition: width 0.3s var(--ease-smooth);
}
.nav-link:hover, .nav-link.active { color: var(--gold); }
.nav-link:hover::after, .nav-link.active::after { width: 100%; }

/* ── Buttons ── */
.btn-gold {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--gold);
  color: var(--navy);
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  padding: 1rem 2.5rem;
  text-decoration: none;
  position: relative;
  overflow: hidden;
  transition: transform 0.3s var(--ease-spring), box-shadow 0.3s ease;
}
.btn-gold::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--gold-light);
  transform: translateX(-101%);
  transition: transform 0.4s var(--ease-smooth);
}
.btn-gold:hover { transform: scale(1.03); box-shadow: 0 0 40px rgba(212,175,55,0.35); }
.btn-gold:hover::before { transform: translateX(0); }
.btn-gold span { position: relative; z-index: 1; }

.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  border: 1.5px solid rgba(255,255,255,0.35);
  color: white;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  padding: 1rem 2.5rem;
  text-decoration: none;
  transition: all 0.3s var(--ease-smooth);
}
.btn-outline:hover {
  background: rgba(255,255,255,0.08);
  border-color: var(--gold);
  color: var(--gold);
  transform: translateY(-2px);
}

/* ── Cards ── */
.card {
  background: white;
  border: 1px solid rgba(0,0,0,0.07);
  border-radius: 1rem;
  overflow: hidden;
  transition: transform 0.5s var(--ease-spring), box-shadow 0.5s ease;
}
.card:hover {
  transform: translateY(-10px);
  box-shadow: 0 30px 60px rgba(10,25,47,0.12);
}

.card-dark {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 1rem;
  transition: all 0.4s ease;
}
.card-dark:hover {
  background: rgba(255,255,255,0.08);
  border-color: rgba(212,175,55,0.3);
  transform: translateY(-6px);
}

/* ── Section Labels ── */
.section-label {
  display: inline-block;
  font-family: var(--font-body);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 1rem;
}

/* ── Divider Line ── */
.gold-line {
  width: 48px;
  height: 2px;
  background: linear-gradient(90deg, var(--gold), transparent);
  margin: 1.25rem 0;
}

/* ── Stats ── */
.stat-num {
  font-family: var(--font-head);
  font-size: clamp(3rem, 7vw, 6rem);
  font-weight: 800;
  line-height: 1;
  color: var(--navy);
}

/* ── Product Card ── */
.product-card {
  background: white;
  border: 1px solid #e8edf5;
  border-radius: 1.25rem;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: all 0.5s var(--ease-spring);
}
.product-card:hover {
  transform: translateY(-12px);
  box-shadow: 0 32px 64px rgba(10,25,47,0.13);
  border-color: rgba(212,175,55,0.4);
}
.product-card .img-wrap {
  background: #f4f7fb;
  padding: 2rem;
  aspect-ratio: 4/3;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
.product-card .img-wrap img {
  width: 100%;
  height: 145%;
  object-fit: contain;
  transition: transform 0.7s var(--ease-spring);
}
.product-card:hover .img-wrap img { transform: scale(1.08); }

/* ── Spec Row ── */
.spec-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.5rem 0;
  border-bottom: 1px solid #f1f5f9;
  font-size: 0.78rem;
}
.spec-row:last-child { border-bottom: none; }
.spec-row .key { color: var(--gray-600); font-weight: 500; }
.spec-row .val { color: var(--navy); font-weight: 700; }

/* ── Timeline ── */
.timeline-line {
  position: absolute;
  left: 50%;
  top: 0; bottom: 0;
  width: 1px;
  background: linear-gradient(to bottom, transparent, rgba(212,175,55,0.4), transparent);
  transform: translateX(-50%);
}
.timeline-dot {
  width: 14px; height: 14px;
  background: var(--gold);
  border-radius: 50%;
  border: 3px solid var(--navy-deep);
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  transition: transform 0.3s var(--ease-spring), box-shadow 0.3s ease;
  z-index: 10;
}
.timeline-item:hover .timeline-dot {
  transform: translateX(-50%) scale(1.5);
  box-shadow: 0 0 16px rgba(212,175,55,0.5);
}

/* ── Logo Cloud ── */
.client-tile {
  border: 1px solid #e2e8f0;
  border-radius: 0.875rem;
  padding: 1.5rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: white;
  transition: all 0.4s var(--ease-smooth);
  min-height: 80px;
}
.client-tile:hover {
  border-color: var(--gold);
  box-shadow: 0 8px 24px rgba(212,175,55,0.12);
  transform: translateY(-4px);
}
.client-tile span {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--navy);
  text-align: center;
  line-height: 1.4;
}

/* ── Testimonials ── */
.quote-card {
  background: white;
  border: 1px solid #e8edf5;
  border-radius: 1.25rem;
  padding: 2.5rem;
  position: relative;
  transition: all 0.4s ease;
}
.quote-card::before {
  content: '"';
  position: absolute;
  top: 1rem; right: 1.5rem;
  font-size: 5rem;
  font-family: Georgia, serif;
  color: var(--gold);
  opacity: 0.15;
  line-height: 1;
}
.quote-card:hover {
  border-color: rgba(212,175,55,0.35);
  box-shadow: 0 16px 48px rgba(10,25,47,0.08);
  transform: translateY(-4px);
}

/* ── ZAM Comparison Table ── */
.zam-table th {
  background: var(--navy);
  color: white;
  padding: 1rem 1.25rem;
  font-size: 0.7rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  font-weight: 700;
}
.zam-table td {
  padding: 0.875rem 1.25rem;
  font-size: 0.82rem;
  border-bottom: 1px solid #f1f5f9;
  vertical-align: top;
}
.zam-table tr:last-child td { border-bottom: none; }
.zam-table .good { color: #16a34a; font-weight: 600; }
.zam-table .neutral { color: var(--gray-600); }
.zam-table tr:nth-child(even) td { background: #f8fafc; }

/* ── Ping Animation ── */
@keyframes ping {
  0% { transform: scale(1); opacity: 0.8; }
  80%, 100% { transform: scale(2.2); opacity: 0; }
}
.ping { animation: ping 2s cubic-bezier(0, 0, 0.2, 1) infinite; }

/* ── Float ── */
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}
.animate-float { animation: float 4s ease-in-out infinite; }

/* ── Fade up ── */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(32px); }
  to   { opacity: 1; transform: translateY(0); }
}
.fade-up { animation: fadeUp 0.7s var(--ease-smooth) both; }
.fade-up-d1 { animation-delay: 0.1s; }
.fade-up-d2 { animation-delay: 0.22s; }
.fade-up-d3 { animation-delay: 0.34s; }
.fade-up-d4 { animation-delay: 0.46s; }

/* ── Scroll reveal ── */
.reveal {
  opacity: 0;
  transform: translateY(36px);
  transition: opacity 0.75s var(--ease-smooth), transform 0.75s var(--ease-smooth);
}
.reveal.visible { opacity: 1; transform: translateY(0); }
.reveal-d1 { transition-delay: 0.1s; }
.reveal-d2 { transition-delay: 0.2s; }
.reveal-d3 { transition-delay: 0.3s; }
.reveal-d4 { transition-delay: 0.4s; }

/* ── Cert Card ── */
.cert-card {
  background: white;
  border: 1px solid #e8edf5;
  border-radius: 1.25rem;
  overflow: hidden;
  transition: all 0.4s var(--ease-spring);
}
.cert-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 24px 48px rgba(10,25,47,0.1);
}
.cert-card img {
  width: 100%;
  height: auto !important;
  display: block;
  object-fit: contain !important;
}

/* ── Footer ── */
footer { background: var(--navy-deep); }
.footer-link {
  color: rgba(255,255,255,0.5);
  text-decoration: none;
  font-size: 0.8rem;
  transition: color 0.3s ease;
  display: block;
  padding: 0.25rem 0;
}
.footer-link:hover { color: var(--gold); }

/* ── Mobile Nav ── */
#mobile-overlay {
  position: fixed;
  inset: 0;
  background: var(--navy-deep);
  z-index: 200;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2rem;
  transform: translateY(-100%);
  transition: transform 0.4s var(--ease-smooth);
}
#mobile-overlay.open { transform: translateY(0); }
#mobile-overlay a {
  color: white;
  font-family: var(--font-head);
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  text-decoration: none;
  transition: color 0.3s ease;
}
#mobile-overlay a:hover { color: var(--gold); }

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

/* ── Hero BG ── */
.hero-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  background-attachment: fixed;
}

/* ── Section padding ── */
.section-pad { padding: 6rem 0; }
@media (min-width: 1024px) { .section-pad { padding: 8rem 0; } }

.container-xl {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 2rem;
}
@media (min-width: 1024px) { .container-xl { padding: 0 5rem; } }

/* ── Grid utilities ── */
.grid-2 { display: grid; grid-template-columns: 1fr; gap: 2rem; }
.grid-3 { display: grid; grid-template-columns: 1fr; gap: 2rem; }
.grid-4 { display: grid; grid-template-columns: 1fr 1fr; gap: 1.5rem; }
@media (min-width: 768px) {
  .grid-2 { grid-template-columns: 1fr 1fr; }
  .grid-3 { grid-template-columns: repeat(3, 1fr); }
  .grid-4 { grid-template-columns: repeat(4, 1fr); }
}
@media (min-width: 1024px) { .grid-3 { grid-template-columns: repeat(3, 1fr); } }

/* ── Page hero inner ── */
.page-hero {
  min-height: 640px;
  display: flex;
  align-items: flex-end;
  padding-bottom: 5.5rem;
  position: relative;
  overflow: hidden;
  background: var(--navy-deep);
  height: 100vh;
}
.page-hero-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center center;
  opacity: 0.45;
}
.page-hero-grad {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, var(--navy-deep) 25%, rgba(6,15,30,0.6) 60%, rgba(6,15,30,0.3) 100%);
}

/* ── Responsive nav utility ── */
@media (max-width: 767px) {
  #nav-links  { display: none !important; }
  #mobile-open { display: block !important; }
  .hide-mobile { display: none !important; }
}
@media (min-width: 768px) {
  #nav-links  { display: flex !important; }
  #mobile-open { display: none !important; }
}

/* ── Other product cards ── */
.other-card {
  background: white;
  border: 1px solid #e8edf5;
  border-radius: 1rem;
  overflow: hidden;
  text-align: center;
  padding: 1.5rem 1rem 1.25rem;
  transition: all 0.4s var(--ease-spring);
}
.other-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 20px 48px rgba(10,25,47,0.1);
  border-color: rgba(212,175,55,0.4);
}
.other-card img {
  width: 70%;
  height: 140px;
  /* object-fit: cover; */
  border-radius: 0.75rem;
  margin-bottom: 1rem;
}

/* ── value badge ── */
.value-badge {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.875rem 1.25rem;
  background: white;
  border: 1px solid #e8edf5;
  border-left: 3px solid var(--gold);
  border-radius: 0.75rem;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--navy);
  transition: all 0.3s ease;
}
.value-badge:hover {
  box-shadow: 0 8px 24px rgba(10,25,47,0.07);
  transform: translateX(4px);
}

/* ── Pulsing green dot ── */
@keyframes pulse-green {
  0%, 100% { box-shadow: 0 0 0 0 rgba(34,197,94,0.5); }
  50% { box-shadow: 0 0 0 6px rgba(34,197,94,0); }
}
.dot-live {
  display: inline-block;
  width: 8px; height: 8px;
  border-radius: 50%;
  background: #22c55e;
  animation: pulse-green 2s ease-in-out infinite;
}

/* ── Light Footer Styling Overrides ── */
footer {
  background: #ffffff !important;
  color: var(--gray-800) !important;
  border-top: 1px solid var(--gray-200);
}
footer p, 
footer span {
  color: var(--gray-600) !important;
}
footer a,
footer .footer-link {
  color: var(--gray-600) !important;
}
footer a:hover,
footer .footer-link:hover {
  color: var(--gold) !important;
}
footer div[style*="border-bottom"] {
  border-bottom: 1px solid var(--gray-200) !important;
}
footer div[style*="color:var(--gold)"] {
  color: var(--navy) !important;
}

/* ── Title Typography Highlights ── */
.title-bold {
  font-weight: 800 !important;
}
.title-thin {
  font-weight: 300 !important;
}

/* ── Product Anchor Deep Linking ── */
#solar-mms,
#solar-trackers,
#peb-solutions {
  scroll-margin-top: 110px;
  position: relative;
  transition: box-shadow 0.4s ease;
}

.product-focus-highlight {
  animation: targetGlow 2.5s ease-out;
}

@keyframes targetGlow {
  0% {
    box-shadow: 0 0 0 4px rgba(212, 175, 55, 0.7), 0 20px 50px rgba(212, 175, 55, 0.2);
  }
  50% {
    box-shadow: 0 0 0 6px rgba(212, 175, 55, 0.4), 0 15px 35px rgba(212, 175, 55, 0.15);
  }
  100% {
    box-shadow: 0 0 0 0 transparent;
  }
}

/* ── Interactive Architecture Cards ── */
a.arch-card {
  display: block;
  text-decoration: none;
  color: inherit;
  cursor: pointer;
}
a.arch-card:hover .arch-glass-content h3 {
  color: var(--gold-light);
  transition: color 0.3s ease;
}
a.arch-card .arch-action-hint {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--gold);
  margin-top: 0.75rem;
  transition: gap 0.3s ease, color 0.3s ease;
}
a.arch-card:hover .arch-action-hint {
  gap: 0.6rem;
  color: var(--gold-light);
}

/* ── Interactive Tabbed Benefits Widget ── */
.benefits-tab-widget {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(212, 175, 55, 0.2);
  border-radius: 1rem;
  padding: 1.25rem 1.5rem;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  margin-top: 1.75rem;
  width: 100%;
}

.benefits-tab-nav {
  display: flex;
  gap: 0.5rem;
  background: rgba(10, 25, 47, 0.65);
  padding: 0.35rem;
  border-radius: 0.65rem;
  border: 1px solid rgba(212, 175, 55, 0.15);
  margin-bottom: 1rem;
}

.benefit-tab-btn {
  flex: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  background: transparent;
  border: 1px solid transparent;
  border-radius: 0.5rem;
  padding: 0.6rem 0.8rem;
  color: rgba(255, 255, 255, 0.65);
  font-family: var(--font-head);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  cursor: pointer;
  transition: all 0.25s ease;
  white-space: nowrap;
}

.benefit-tab-btn:hover {
  color: white;
  background: rgba(255, 255, 255, 0.05);
}

.benefit-tab-btn.active {
  background: var(--navy);
  color: var(--gold);
  border-color: rgba(212, 175, 55, 0.4);
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.3);
}

.benefit-tab-pane {
  display: none;
  min-height: 220px;
  animation: fadeInPane 0.25s ease;
}

.benefit-tab-pane.active {
  display: flex;
  flex-direction: column;
}

@keyframes fadeInPane {
  from {
    opacity: 0;
    transform: translateY(3px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.benefit-tab-pane .benefit-list {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.benefit-tab-pane .benefit-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.86rem;
  color: rgba(255, 255, 255, 0.88);
  line-height: 1.4;
  padding: 0.48rem 0.75rem;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(255, 255, 255, 0.04);
  border-radius: 0.5rem;
  transition: all 0.25s ease;
  white-space: nowrap;
}

.benefit-tab-pane .benefit-item:hover {
  background: rgba(212, 175, 55, 0.06);
  border-color: rgba(212, 175, 55, 0.25);
  color: #ffffff;
  transform: translateX(4px);
}

.benefit-tab-pane .benefit-item svg {
  flex-shrink: 0;
  color: var(--gold);
}

@media (max-width: 540px) {
  .benefits-tab-nav {
    flex-direction: column;
  }
  .benefit-tab-pane {
    min-height: auto;
  }
  .benefit-tab-pane .benefit-item {
    white-space: normal;
    font-size: 0.8rem;
  }
}