/* ═══════════════════════════════════════════════════════════════
   LAYOUT — Container, Grid, Header, Footer
   ═══════════════════════════════════════════════════════════════ */

/* ═══ CONTAINER ═══ */
.container {
  width: 100%;
  max-width: var(--container-xl);
  margin-inline: auto;
  padding-inline: var(--container-px);
}

.container--wide {
  max-width: var(--container-2xl);
}

.container--narrow {
  max-width: var(--container-lg);
}


/* ═══ GRID SYSTEM ═══ */
.grid {
  display: grid;
  gap: var(--space-8);
}

.grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid-cols-4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 1023px) {
  .grid-cols-3,
  .grid-cols-4 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 767px) {
  .grid-cols-2,
  .grid-cols-3,
  .grid-cols-4 { grid-template-columns: 1fr; }
}


/* ═══ SECTION BASE ═══ */
.section {
  padding-block: var(--section-py);
  position: relative;
}

.section--dark {
  background: var(--color-bg-primary);
  color: var(--color-text-inverse);
}

.section--alt {
  background: var(--color-surface-alt);
}

/* Grid texture overlay for dark sections */
.bg-grid-dark {
  background-image:
    linear-gradient(rgba(74, 124, 155, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(74, 124, 155, 0.05) 1px, transparent 1px);
  background-size: 40px 40px;
}

/* Grid texture overlay for light sections */
.bg-grid-light {
  background-image:
    linear-gradient(rgba(74, 124, 155, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(74, 124, 155, 0.03) 1px, transparent 1px);
  background-size: 40px 40px;
}

/* Noise texture */
.noise-overlay::before {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 9999;
  opacity: 0.015;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  background-repeat: repeat;
  background-size: 256px 256px;
}


/* ═══ HEADER ═══ */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-header);
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: var(--border-thin);
  transition: background var(--transition-base), box-shadow var(--transition-base);
}

.site-header.scrolled {
  box-shadow: var(--shadow-md);
}

/* Transparent variant for pages with dark hero */
.site-header--transparent {
  background: rgba(13, 17, 23, 0.6);
  border-bottom-color: var(--color-border-dark);
}

.site-header--transparent.scrolled {
  background: rgba(255, 255, 255, 0.95);
  border-bottom-color: var(--color-border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  max-width: var(--container-2xl);
  margin-inline: auto;
  padding-inline: var(--container-px);
}

.header-logo {
  flex-shrink: 0;
}

.header-logo img {
  height: 40px;
  width: auto;
}

/* Logo swap for transparent header */
.site-header--transparent .logo-light { display: block; }
.site-header--transparent .logo-dark  { display: none; }
.site-header--transparent.scrolled .logo-light { display: none; }
.site-header--transparent.scrolled .logo-dark  { display: block; }


/* ═══ DESKTOP NAVIGATION ═══ */
.nav-list {
  display: flex;
  list-style: none;
  gap: var(--space-1);
  align-items: center;
}

.nav-item {
  position: relative;
}

.nav-link {
  display: block;
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-primary);
  letter-spacing: var(--tracking-wide);
  transition: color var(--transition-fast);
  border-bottom: 2px solid transparent;
  white-space: nowrap;
}

.site-header--transparent .nav-link {
  color: var(--color-text-inverse);
}

.site-header--transparent.scrolled .nav-link {
  color: var(--color-text-primary);
}

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

/* Dropdown */
.nav-dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 200px;
  background: var(--color-surface);
  border: var(--border-thin);
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: all var(--transition-base);
  list-style: none;
  padding: var(--space-2) 0;
  z-index: var(--z-dropdown);
}

.nav-item:hover > .nav-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.nav-dropdown a {
  display: block;
  padding: var(--space-2) var(--space-5);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  transition: all var(--transition-fast);
}

.nav-dropdown a:hover {
  color: var(--color-accent);
  background: var(--color-accent-subtle);
}


/* ═══ MOBILE HAMBURGER ═══ */
.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: none;
  background: none;
  cursor: pointer;
  position: relative;
  padding: 10px;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text-primary);
  margin: 5px auto;
  transition: all var(--transition-base);
}

.site-header--transparent .nav-toggle span {
  background: var(--color-text-inverse);
}

.site-header--transparent.scrolled .nav-toggle span {
  background: var(--color-text-primary);
}

/* Hamburger animation when open */
.nav-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}
.nav-toggle.active span:nth-child(2) {
  opacity: 0;
}
.nav-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}


/* ═══ MOBILE MENU ═══ */
@media (max-width: 1023px) {
  .nav-list {
    display: none;
  }

  .nav-toggle {
    display: block;
  }

  /* Full-screen mobile menu */
  .nav-list.open {
    display: flex;
    flex-direction: column;
    position: fixed;
    inset: 72px 0 0 0;
    background: var(--color-surface);
    padding: var(--space-8);
    z-index: var(--z-overlay);
    overflow-y: auto;
    gap: 0;
    align-items: stretch;
  }

  .nav-item {
    border-bottom: var(--border-subtle);
  }

  .nav-link {
    padding: var(--space-4) var(--space-2);
    font-size: var(--text-base);
    border-bottom: none;
  }

  .site-header--transparent .nav-link,
  .site-header--transparent.scrolled .nav-link {
    color: var(--color-text-primary);
  }

  /* Mobile dropdown: accordion */
  .nav-dropdown {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: none;
    border: none;
    padding: 0 0 var(--space-3) var(--space-6);
    display: none;
    background: transparent;
  }

  .nav-dropdown.open {
    display: block;
  }

  .nav-dropdown a {
    padding: var(--space-2) var(--space-3);
    font-size: var(--text-sm);
  }

  /* Dropdown toggle arrow */
  .nav-item.has-dropdown > .nav-link::after {
    content: '';
    display: inline-block;
    width: 8px;
    height: 8px;
    border-right: 2px solid currentColor;
    border-bottom: 2px solid currentColor;
    transform: rotate(45deg);
    margin-left: var(--space-2);
    transition: transform var(--transition-base);
    vertical-align: middle;
  }

  .nav-item.has-dropdown.open > .nav-link::after {
    transform: rotate(-135deg);
  }
}


/* ═══ FOOTER ═══ */
.site-footer {
  background: var(--color-bg-primary);
  color: var(--color-text-inverse-muted);
  padding-top: var(--space-16);
}

.footer-main {
  display: grid;
  grid-template-columns: 1.5fr 2fr 1fr auto;
  gap: var(--space-12);
  max-width: var(--container-2xl);
  margin-inline: auto;
  padding-inline: var(--container-px);
  padding-bottom: var(--space-12);
  border-bottom: var(--border-dark);
}

.footer-brand p {
  color: var(--color-text-inverse);
  font-size: var(--text-lg);
  margin-bottom: var(--space-2);
}

.footer-brand .slogan {
  font-family: var(--font-display);
  font-size: var(--text-xs);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: var(--color-accent);
  margin-top: var(--space-3);
}

.footer-heading {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text-inverse);
  margin-bottom: var(--space-5);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: var(--space-2);
}

.footer-links a {
  font-size: var(--text-sm);
  color: var(--color-text-inverse-muted);
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: var(--color-text-inverse);
}

.footer-contact p {
  font-size: var(--text-sm);
  margin-bottom: var(--space-2);
  line-height: var(--leading-relaxed);
}

.footer-qr img {
  width: 96px;
  height: 96px;
  border: var(--border-dark);
  object-fit: cover;
}

.footer-qr p {
  font-size: var(--text-xs);
  color: var(--color-text-inverse-muted);
  margin-top: var(--space-2);
  text-align: center;
}

.footer-bottom {
  max-width: var(--container-2xl);
  margin-inline: auto;
  padding: var(--space-5) var(--container-px);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: var(--text-xs);
}

.footer-bottom a {
  color: var(--color-text-inverse-muted);
  transition: color var(--transition-fast);
}

.footer-bottom a:hover {
  color: var(--color-text-inverse);
}

/* Footer responsive */
@media (max-width: 1023px) {
  .footer-main {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 767px) {
  .footer-main {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }

  .footer-bottom {
    flex-direction: column;
    gap: var(--space-2);
    text-align: center;
  }
}


/* ═══ TWO-COLUMN LAYOUT ═══ */
.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: center;
}

.two-col--reverse {
  direction: rtl;
}

.two-col--reverse > * {
  direction: ltr;
}

@media (max-width: 1023px) {
  .two-col {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }
  .two-col--reverse {
    direction: ltr;
  }
}


/* ═══ MAIN CONTENT OFFSET (for fixed header) ═══ */
.page-content {
  padding-top: 72px; /* offset for fixed header */
}