:root {
  --bg-canvas: #0f1b2d;
  --bg-surface: #172a45;
  --bg-surface-hover: #1f375b;
  --text-primary: #f4f1ea;
  --text-muted: #9eb1c7;
  --accent-primary: #d4a84b;
  --accent-secondary: #e6be6d;
  --border-subtle: rgba(212, 168, 75, 0.22);
  --border-glass: rgba(244, 241, 234, 0.12);
  --ease-kinetic: cubic-bezier(0.16, 1, 0.3, 1);
  --shadow-elevation: 0 16px 36px -6px rgba(5, 12, 22, 0.65);
  --glow-accent: 0 0 24px -4px rgba(212, 168, 75, 0.35);
  --radius-card: 20px;
}

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

body {
  background-color: var(--bg-canvas);
  color: var(--text-primary);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  line-height: 1.65;
  font-size: 16px;
  overflow-x: clip;
  overflow-wrap: anywhere;
  hyphens: auto;
}

code, pre, .mono-data {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

a {
  color: var(--accent-secondary);
  text-decoration: none;
  transition: color 0.2s var(--ease-kinetic);
}

a:hover {
  color: var(--text-primary);
}

/* Header & Navigation */
header.site-header {
  position: static;
  background-color: #0b1422;
  border-bottom: 1px solid var(--border-subtle);
  padding: 1.25rem 2rem;
}

.header-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.brand-emblem {
  text-align: left;
  display: flex;
  flex-direction: column;
}

.brand-title {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

.brand-title span {
  color: var(--accent-primary);
}

.brand-tagline {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

nav.main-nav {
  display: flex;
  gap: 1.25rem;
  align-items: center;
}

nav.main-nav a {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-primary);
  padding: 0.4rem 0.6rem;
  border-radius: 8px;
  transition: all 0.2s var(--ease-kinetic);
}

nav.main-nav a:hover,
nav.main-nav a.active {
  color: var(--accent-primary);
  background-color: rgba(212, 168, 75, 0.1);
}

.mobile-menu-btn {
  display: none;
  background: transparent;
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  font-size: 1.5rem;
  line-height: 1;
  padding: 0.35rem 0.75rem;
  border-radius: 8px;
  cursor: pointer;
}

.mobile-drawer {
  display: none;
  flex-direction: column;
  background: var(--bg-surface);
  border-top: 1px solid var(--border-subtle);
  padding: 1rem 1.5rem;
  gap: 0.75rem;
}

.mobile-drawer.open {
  display: flex;
}

/* Page Frame */
.page-wrapper {
  max-width: 1200px;
  margin: 0 auto;
  padding: 3rem 1.5rem 5rem 1.5rem;
}

.reading-column {
  max-width: 72ch;
  margin: 0 auto;
}

/* Hero Section */
.hero-glazing {
  position: relative;
  border-radius: var(--radius-card);
  overflow: hidden;
  margin-bottom: 3.5rem;
  border: 1px solid var(--border-subtle);
  box-shadow: var(--shadow-elevation);
  background: #09121d;
}

.hero-glazing img {
  width: 100%;
  height: 480px;
  object-fit: cover;
  display: block;
  opacity: 0.45;
  filter: contrast(1.15) brightness(0.85);
}

.hero-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 3rem;
  background: linear-gradient(180deg, rgba(15, 27, 45, 0.2) 0%, rgba(15, 27, 45, 0.95) 90%);
}

.badge-tag {
  display: inline-block;
  align-self: flex-start;
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent-primary);
  border: 1px solid var(--accent-primary);
  padding: 0.25rem 0.65rem;
  border-radius: 999px;
  margin-bottom: 1rem;
}

h1 {
  font-size: clamp(2rem, 3.8vw, 3rem);
  line-height: 1.18;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 1rem;
  letter-spacing: -0.02em;
}

h2 {
  font-size: clamp(1.4rem, 2.3vw, 1.9rem);
  line-height: 1.3;
  margin: 2.5rem 0 1rem 0;
  color: var(--text-primary);
  letter-spacing: -0.015em;
  border-bottom: 1px solid var(--border-glass);
  padding-bottom: 0.5rem;
}

h3 {
  font-size: 1.25rem;
  margin: 1.5rem 0 0.5rem 0;
  color: var(--accent-secondary);
}

p {
  margin-bottom: 1.25rem;
  color: #dce4ed;
}

.lead {
  font-size: 1.15rem;
  line-height: 1.7;
  color: var(--text-primary);
  margin-bottom: 1.5rem;
}

/* Translucent Glass Cards & Bento Grids */
.bento-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(290px, 1fr));
  gap: 1.5rem;
  margin: 2.5rem 0;
}

.glass-card {
  background: rgba(23, 42, 69, 0.75);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-card);
  padding: 1.75rem;
  box-shadow: var(--shadow-elevation);
  transition: transform 0.3s var(--ease-kinetic), border-color 0.3s var(--ease-kinetic), box-shadow 0.3s var(--ease-kinetic);
}

.glass-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-subtle);
  box-shadow: var(--shadow-elevation), var(--glow-accent);
}

.glass-card h3 {
  margin-top: 0;
  color: var(--text-primary);
}

.card-lead-metric {
  font-size: 2rem;
  font-weight: 700;
  color: var(--accent-primary);
  margin-bottom: 0.25rem;
}

/* Metrics and Engineering Strip */
.metric-strip {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
  background: #09121d;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-card);
  padding: 1.5rem;
  margin: 2rem 0;
}

.metric-item {
  display: flex;
  flex-direction: column;
}

.metric-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: 0.35rem;
}

.metric-val {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--accent-primary);
}

.metric-sub {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* Image Breakouts */
.glazing-pullout {
  margin: 2.75rem 0;
  border-radius: var(--radius-card);
  overflow: hidden;
  border: 1px solid var(--border-glass);
  background: var(--bg-surface);
}

.glazing-pullout img {
  width: 100%;
  height: 380px;
  object-fit: cover;
  display: block;
}

.glazing-pullout figcaption {
  padding: 0.85rem 1.25rem;
  font-size: 0.85rem;
  color: var(--text-muted);
  background: rgba(11, 20, 34, 0.9);
  border-top: 1px solid var(--border-glass);
}

/* Data Table wrapper */
.table-container {
  overflow-x: auto;
  margin: 2rem 0;
  border-radius: var(--radius-card);
  border: 1px solid var(--border-glass);
  background: var(--bg-surface);
}

table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.92rem;
}

th, td {
  padding: 1rem 1.25rem;
  border-bottom: 1px solid rgba(244, 241, 234, 0.08);
}

th {
  background: rgba(11, 20, 34, 0.8);
  color: var(--accent-primary);
  font-weight: 600;
  text-transform: uppercase;
  font-size: 0.78rem;
  letter-spacing: 0.05em;
}

tr:last-child td {
  border-bottom: none;
}

tr:hover td {
  background-color: rgba(212, 168, 75, 0.04);
}

/* Interactive Calculator Tool */
.calculator-box {
  background: #122137;
  border: 1px solid var(--accent-primary);
  border-radius: var(--radius-card);
  padding: 2rem;
  margin: 3rem 0;
  box-shadow: var(--shadow-elevation);
}

.calc-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.25rem;
  margin-bottom: 1.5rem;
}

.input-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.input-group select,
.input-group input,
.input-group textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  background: #09121d;
  border: 1px solid var(--border-glass);
  color: var(--text-primary);
  border-radius: 10px;
  font-size: 0.95rem;
  outline: none;
}

.input-group select:focus,
.input-group input:focus,
.input-group textarea:focus {
  border-color: var(--accent-primary);
}

.calc-result-panel {
  background: #0b1422;
  border-radius: 12px;
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  border-left: 4px solid var(--accent-primary);
}

/* Buttons */
.btn-gold {
  display: inline-block;
  background-color: var(--accent-primary);
  color: #0b1422;
  font-weight: 700;
  font-size: 0.95rem;
  padding: 0.85rem 1.6rem;
  border-radius: 12px;
  border: none;
  cursor: pointer;
  box-shadow: 0 4px 14px rgba(212, 168, 75, 0.3);
  transition: all 0.25s var(--ease-kinetic);
}

.btn-gold:hover {
  background-color: var(--accent-secondary);
  color: #050c14;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(212, 168, 75, 0.45);
}

.btn-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-weight: 600;
  color: var(--accent-primary);
  border-bottom: 1px solid transparent;
  padding-bottom: 2px;
  transition: border-color 0.2s;
}

.btn-link:hover {
  border-bottom-color: var(--accent-primary);
  color: var(--accent-secondary);
}

/* FAQ Accordion items */
.faq-stack {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  margin: 2rem 0;
}

.faq-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-glass);
  border-radius: 16px;
  padding: 1.5rem;
}

.faq-card h3 {
  margin-top: 0;
  color: var(--accent-primary);
  font-size: 1.15rem;
}

/* Footer */
footer.site-footer {
  background-color: #070d16;
  border-top: 1px solid var(--border-subtle);
  padding: 3.5rem 1.5rem 2.5rem 1.5rem;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 2.5rem;
  margin-bottom: 3rem;
}

.footer-column h4 {
  color: var(--text-primary);
  font-size: 1rem;
  margin-bottom: 1rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.footer-column ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.footer-column ul li a {
  color: var(--text-muted);
}

.footer-column ul li a:hover {
  color: var(--accent-primary);
}

.footer-bottom {
  max-width: 1200px;
  margin: 0 auto;
  border-top: 1px solid rgba(244, 241, 234, 0.08);
  padding-top: 1.75rem;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  font-size: 0.85rem;
}

/* Scroll reveal helper */
.reveal-init {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s var(--ease-kinetic), transform 0.6s var(--ease-kinetic);
}

.reveal-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 768px) {
  header.site-header {
    padding: 1rem 1.25rem;
  }
  
  nav.main-nav {
    display: none;
  }
  
  .mobile-menu-btn {
    display: block;
  }
  
  .hero-glazing img {
    height: 320px;
  }
  
  .hero-overlay {
    padding: 1.5rem;
  }
  
  .page-wrapper {
    padding: 2rem 1rem;
  }
}

@media (prefers-reduced-motion: reduce){*,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important;scroll-behavior:auto!important}}