/**
 * CSTL Corporate Design System — Layout & Navigation
 */

/* ==========================================================================
   Header & Navigation
   ========================================================================== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: var(--z-header);
  background: rgba(10, 19, 26, 0.82);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-bottom: 1px solid var(--cstl-steel-border-subtle);
  transition: all var(--trans-normal);
}

.site-header.scrolled {
  background: rgba(7, 16, 23, 0.96);
  border-bottom-color: var(--cstl-steel-border);
  box-shadow: var(--shadow-md);
  padding: 0.25rem 0;
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 80px;
  transition: height var(--trans-normal);
}

.site-header.scrolled .nav-container {
  height: 70px;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  z-index: var(--z-elevated);
}

.nav-brand img, .nav-brand svg {
  height: 48px;
  width: auto;
}

/* Desktop Navigation Menu */
.nav-menu {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-item {
  position: relative;
}

.nav-link {
  font-family: var(--cstl-font-display);
  font-size: 0.95rem;
  font-weight: 600;
  color: #E2E8F0;
  padding: 0.5rem 0;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--cstl-amber);
  transition: width var(--trans-normal);
}

.nav-link:hover {
  color: var(--cstl-text-white);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

.nav-link.active {
  color: var(--cstl-amber);
}

/* Header Action CTA */
.nav-actions {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

.nav-phone-quick {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--cstl-font-mono);
  font-size: 0.85rem;
  color: #CBD5E1;
  font-weight: 500;
}

.nav-phone-quick svg {
  width: 15px;
  height: 15px;
  color: var(--cstl-amber);
}

.nav-phone-quick:hover {
  color: var(--cstl-amber);
}

/* Hamburger Button */
.hamburger-btn {
  display: none;
  background: transparent;
  border: 1px solid var(--cstl-steel-border);
  border-radius: var(--radius-sm);
  width: 44px;
  height: 44px;
  padding: 8px;
  cursor: pointer;
  flex-direction: column;
  justify-content: space-around;
  align-items: center;
  z-index: var(--z-elevated);
}

.hamburger-line {
  width: 24px;
  height: 2px;
  background-color: var(--cstl-text-white);
  border-radius: 2px;
  transition: all var(--trans-normal);
}

.hamburger-btn.active .hamburger-line:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}

.hamburger-btn.active .hamburger-line:nth-child(2) {
  opacity: 0;
}

.hamburger-btn.active .hamburger-line:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

/* Mobile Drawer */
.mobile-drawer {
  position: fixed;
  top: 0;
  right: -100%;
  width: min(85vw, 380px);
  height: 100vh;
  background: var(--cstl-dark-900);
  border-left: 1px solid var(--cstl-steel-border);
  padding: 6rem 2rem 2.5rem;
  z-index: var(--z-drawer);
  transition: right var(--trans-smooth);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  overflow-y: auto;
  box-shadow: -10px 0 30px rgba(0,0,0,0.8);
}

.mobile-drawer.active {
  right: 0;
}

.mobile-drawer-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(4px);
  z-index: calc(var(--z-drawer) - 1);
  opacity: 0;
  visibility: hidden;
  transition: all var(--trans-normal);
}

.mobile-drawer-backdrop.active {
  opacity: 1;
  visibility: visible;
}

.mobile-nav-list {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.mobile-nav-link {
  font-family: var(--cstl-font-display);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--cstl-text-white);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--cstl-steel-border-subtle);
}

.mobile-nav-link:hover, .mobile-nav-link.active {
  color: var(--cstl-amber);
}

/* ==========================================================================
   Hero Layout
   ========================================================================== */
.hero-section {
  position: relative;
  min-height: 92vh;
  display: flex;
  align-items: center;
  padding-top: 120px;
  padding-bottom: 60px;
  overflow: hidden;
}

.hero-background-wrapper {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-background-wrapper img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  filter: brightness(0.65) contrast(1.1);
}

.hero-gradient-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    90deg, 
    rgba(7, 16, 23, 0.95) 0%, 
    rgba(10, 19, 26, 0.85) 55%, 
    rgba(10, 19, 26, 0.4) 100%
  );
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 820px;
}

.hero-headline {
  margin-top: 1rem;
  margin-bottom: 1.5rem;
  color: var(--cstl-text-white);
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.5);
}

.hero-headline .highlight {
  color: var(--cstl-amber);
  display: inline-block;
}

.hero-subtext {
  font-size: clamp(1.1rem, 1.8vw, 1.3rem);
  color: #E2E8F0;
  line-height: 1.65;
  margin-bottom: 2.5rem;
  max-width: 720px;
}

.hero-ctas {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 1.25rem;
  margin-bottom: 3.5rem;
}

.hero-stats-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  border-top: 1px solid var(--cstl-steel-border);
  padding-top: 2rem;
}

.hero-stat-item {
  display: flex;
  flex-direction: column;
}

.hero-stat-val {
  font-family: var(--cstl-font-display);
  font-size: 1.85rem;
  font-weight: 800;
  color: var(--cstl-text-white);
  line-height: 1.1;
}

.hero-stat-val span {
  color: var(--cstl-amber);
}

.hero-stat-lbl {
  font-size: 0.82rem;
  color: var(--cstl-text-secondary);
  font-weight: 500;
  margin-top: 0.25rem;
}

/* ==========================================================================
   Page Hero (Subpages)
   ========================================================================== */
.page-hero {
  position: relative;
  padding-top: 140px;
  padding-bottom: 60px;
  background: var(--cstl-dark-800);
  border-bottom: 1px solid var(--cstl-steel-border);
  overflow: hidden;
}

.page-hero-inner {
  max-width: 860px;
}

.page-hero-title {
  margin-top: 0.5rem;
  margin-bottom: 1rem;
}

.page-breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--cstl-font-mono);
  font-size: 0.85rem;
  color: var(--cstl-text-muted);
  margin-bottom: 1rem;
}

.page-breadcrumb a {
  color: var(--cstl-text-secondary);
}

.page-breadcrumb a:hover {
  color: var(--cstl-amber);
}

.page-breadcrumb span {
  color: var(--cstl-amber);
}

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer {
  background: #050B10;
  border-top: 1px solid var(--cstl-steel-border);
  padding-top: var(--space-20);
  padding-bottom: var(--space-8);
  position: relative;
  z-index: 10;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1.2fr 1.5fr;
  gap: 3rem;
  margin-bottom: 4rem;
}

.footer-brand p {
  margin-top: 1.25rem;
  font-size: 0.95rem;
  line-height: 1.6;
  max-width: 360px;
}

.footer-heading {
  font-family: var(--cstl-font-display);
  font-size: 1rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--cstl-text-white);
  margin-bottom: 1.5rem;
  position: relative;
  padding-bottom: 0.5rem;
}

.footer-heading::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 28px;
  height: 2px;
  background: var(--cstl-amber);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.footer-links a {
  color: var(--cstl-text-secondary);
  font-size: 0.92rem;
  transition: all var(--trans-fast);
}

.footer-links a:hover {
  color: var(--cstl-amber);
  transform: translateX(4px);
}

.footer-contact-item {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  margin-bottom: 1rem;
  font-size: 0.92rem;
  color: var(--cstl-text-secondary);
}

.footer-contact-item svg {
  width: 18px;
  height: 18px;
  color: var(--cstl-amber);
  flex-shrink: 0;
  margin-top: 3px;
}

.footer-bottom {
  border-top: 1px solid var(--cstl-steel-border-subtle);
  padding-top: 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1.5rem;
  font-size: 0.85rem;
  color: var(--cstl-text-muted);
}

.footer-spacitek {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--cstl-text-secondary);
}

.footer-spacitek span {
  color: var(--cstl-amber);
  font-weight: 700;
}

/* ==========================================================================
   Mobile Sticky Bottom CTA Bar
   ========================================================================== */
.mobile-bottom-bar {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  background: rgba(7, 16, 23, 0.95);
  backdrop-filter: blur(12px);
  border-top: 1px solid var(--cstl-steel-border);
  padding: 0.75rem 1rem;
  z-index: var(--z-sticky);
  box-shadow: 0 -4px 15px rgba(0, 0, 0, 0.5);
}

.mobile-bottom-actions {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 0.75rem;
  align-items: center;
}

/* ==========================================================================
   Responsive Breakpoints
   ========================================================================== */
@media (max-width: 1024px) {
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 2.5rem;
  }
  .hero-stats-row {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 860px) {
  .nav-menu, .nav-actions .btn {
    display: none;
  }
  .hamburger-btn {
    display: flex;
  }
  .hero-gradient-overlay {
    background: linear-gradient(
      180deg, 
      rgba(7, 16, 23, 0.92) 0%, 
      rgba(10, 19, 26, 0.88) 60%, 
      rgba(10, 19, 26, 0.95) 100%
    );
  }
  .mobile-bottom-bar {
    display: block;
  }
  body {
    padding-bottom: 60px; /* offset for bottom bar */
  }
}

@media (max-width: 600px) {
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
  .trust-items-wrapper {
    flex-direction: column;
    align-items: flex-start;
  }
  .hero-stats-row {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
}