/* Layout System - GraymatterLab Website */

/* Container System */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--gms-space-4);
}

.container--wide {
  max-width: 1400px;
}

.container--narrow {
  max-width: 800px;
}

/* Grid System */
.grid {
  display: grid;
  gap: var(--gms-space-6);
}

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

@media (max-width: 768px) {
  .grid--2,
  .grid--3,
  .grid--4 {
    grid-template-columns: 1fr;
  }
}

/* Flexbox Utilities */
.flex {
  display: flex;
}

.flex-col {
  display: flex;
  flex-direction: column;
}

.items-center { align-items: center; }
.items-start { align-items: flex-start; }
.items-end { align-items: flex-end; }

.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.justify-start { justify-content: flex-start; }
.justify-end { justify-content: flex-end; }

.gap-1 { gap: var(--gms-space-1); }
.gap-2 { gap: var(--gms-space-2); }
.gap-3 { gap: var(--gms-space-3); }
.gap-4 { gap: var(--gms-space-4); }
.gap-6 { gap: var(--gms-space-6); }
.gap-8 { gap: var(--gms-space-8); }

/* Section Spacing */
.section {
  padding: var(--gms-space-16) 0;
}

.section--sm {
  padding: var(--gms-space-12) 0;
}

.section--lg {
  padding: var(--gms-space-24) 0;
}

@media (max-width: 768px) {
  .section {
    padding: var(--gms-space-12) 0;
  }

  .section--sm {
    padding: var(--gms-space-8) 0;
  }

  .section--lg {
    padding: var(--gms-space-16) 0;
  }
}

/* Section Wrapper System - Full-bleed backgrounds */
.section-wrapper {
  padding: var(--gms-space-16) 0;
  margin: 0;
}

/* Background variants */
.section-bg-primary {
  background-color: var(--gms-bg-primary); /* #fafafa light gray */
}

.section-bg-secondary {
  background-color: var(--gms-bg-secondary); /* #ffffff white */
}

/* CTA section - subtle blue tint for emphasis */
.section-bg-cta {
  background: linear-gradient(180deg, var(--gms-bg-primary) 0%, rgba(0, 170, 231, 0.06) 100%);
}

/* Dark section - matte black full-bleed background */
.section-bg-dark {
  background-color: #1e1e1e;
}

/* Content container for section wrappers */
.section-wrapper__content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--gms-space-4);
  width: 100%;
  box-sizing: border-box;
}

@media (max-width: 768px) {
  .section-wrapper {
    padding: var(--gms-space-12) 0;
  }
}

@media (max-width: 480px) {
  .section-wrapper {
    padding: var(--gms-space-10) 0;
  }
}

/* Scroll Reveal Animation */
.scroll-reveal {
  opacity: 0;
  transition: opacity 0.6s ease-out;
}

.scroll-reveal.is-visible {
  opacity: 1;
}

@media (prefers-reduced-motion: reduce) {
  .scroll-reveal {
    opacity: 1;
    transition: none;
  }
}

/* Header Styles */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: var(--gms-matte-black);
  border-bottom: 1px solid var(--gms-neutral-800);
  z-index: 1000;
  transition: box-shadow 0.3s ease, border-color 0.3s ease;
}

/* Header scroll effect - adds shadow when scrolled */
.header--scrolled {
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
  border-bottom-color: transparent;
}

.header__content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 80px;
  padding: 0 var(--gms-space-4);
}

.logo {
  display: flex;
  align-items: center;
  text-decoration: none;
}

.logo__image {
  height: 48px;
  width: auto;
  display: block;
}

/* Fallback text logo styling (for accessibility/SEO) */
.logo__text {
  font-size: var(--gms-heading-4);
  font-weight: var(--gms-font-bold);
  color: var(--gms-text-primary);
  text-decoration: none;
}

.nav {
  display: flex;
  align-items: center;
  gap: var(--gms-space-8);
}

.nav__list {
  display: flex;
  list-style: none;
  gap: var(--gms-space-4);
  margin: 0;
  padding: 0;
}

.nav__link {
  font-weight: var(--gms-font-medium);
  color: rgba(255, 255, 255, 0.8);
  text-decoration: none;
  padding: var(--gms-space-2) var(--gms-space-3);
  border-radius: var(--gms-radius-md);
  transition: color 0.2s ease;
  min-height: var(--gms-touch-target-min);
  display: flex;
  align-items: center;
  position: relative;
}

/* Animated underline */
.nav__link::after {
  content: '';
  position: absolute;
  bottom: 4px;
  left: var(--gms-space-3);
  right: var(--gms-space-3);
  height: 2px;
  background: var(--gms-bright-blue);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s ease;
}

.nav__link:hover {
  color: var(--gms-white);
}

.nav__link:hover::after {
  transform: scaleX(1);
}

.nav__link--active {
  color: var(--gms-white);
  font-weight: var(--gms-font-semibold);
  background: rgba(255, 255, 255, 0.2);
  border-radius: var(--gms-radius-md);
}

.nav__link--active::after {
  transform: scaleX(0); /* Hide underline when pill is active */
}

.nav__link:focus-visible {
  outline: 2px solid var(--gms-bright-blue);
  outline-offset: 2px;
}

/* External link indicator */
.nav__link[target="_blank"]::before {
  content: '';
  display: inline-block;
  width: 12px;
  height: 12px;
  margin-left: 4px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20' fill='%23ffffff'%3E%3Cpath d='M4.25 5.5a.75.75 0 00-.75.75v8.5c0 .414.336.75.75.75h8.5a.75.75 0 00.75-.75v-4a.75.75 0 011.5 0v4A2.25 2.25 0 0112.75 17h-8.5A2.25 2.25 0 012 14.75v-8.5A2.25 2.25 0 014.25 4h5a.75.75 0 010 1.5h-5z'/%3E%3Cpath d='M6.194 12.753a.75.75 0 001.06.053L16.5 4.44v2.81a.75.75 0 001.5 0v-4.5a.75.75 0 00-.75-.75h-4.5a.75.75 0 000 1.5h2.553l-9.056 8.194a.75.75 0 00-.053 1.06z'/%3E%3C/svg%3E");
  background-size: contain;
  vertical-align: middle;
  opacity: 0.6;
  order: 1;
}

.nav__cta {
  margin-left: var(--gms-space-4);
}

/* Agent Hub CTA Button Style */
.nav__link--cta {
  background: var(--gms-papaya-orange);
  color: var(--gms-matte-black) !important;
  padding: var(--gms-space-2) var(--gms-space-4);
  border-radius: var(--gms-radius-md);
  font-weight: var(--gms-font-semibold);
  transition: background 0.2s ease, transform 0.2s ease;
}

.nav__link--cta:hover {
  background: var(--gms-warning-600);
  color: var(--gms-matte-black) !important;
  transform: translateY(-1px);
}

.nav__link--cta::after {
  display: none;
}

.nav__link--cta::before,
.nav__link--cta[target="_blank"]::before {
  display: none !important;
}

/* Mobile Navigation */
.nav__toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  min-height: var(--gms-touch-target-min);
  min-width: var(--gms-touch-target-min);
  align-items: center;
  justify-content: center;
  position: relative;
  z-index: 1001;
}

/* Animated Hamburger Icon */
.nav__toggle-icon {
  width: 24px;
  height: 18px;
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.nav__toggle-line {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--gms-white);
  border-radius: 2px;
  transition: transform 0.3s ease, opacity 0.3s ease;
  transform-origin: center;
}

/* Hamburger to X animation */
.nav__toggle[aria-expanded="true"] .nav__toggle-line:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}

.nav__toggle[aria-expanded="true"] .nav__toggle-line:nth-child(2) {
  opacity: 0;
}

.nav__toggle[aria-expanded="true"] .nav__toggle-line:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

/* Mobile Nav Backdrop */
.nav__backdrop {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 999;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}

.nav__backdrop--visible {
  opacity: 1;
  visibility: visible;
}

/* Body scroll lock */
body.nav-open {
  overflow: hidden;
}

@media (max-width: 768px) {
  .nav__toggle {
    display: flex;
  }

  .nav__backdrop {
    display: block;
  }

  .nav {
    position: fixed;
    top: 80px;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--gms-matte-black);
    border-top: 1px solid var(--gms-neutral-800);
    flex-direction: column;
    padding: var(--gms-space-6) var(--gms-space-4);
    transform: translateX(100%);
    opacity: 0;
    visibility: hidden;
    transition: transform 0.3s ease, opacity 0.3s ease, visibility 0.3s ease;
    z-index: 1000;
    overflow-y: auto;
  }

  .nav--open {
    transform: translateX(0);
    opacity: 1;
    visibility: visible;
  }
  
  .nav__list {
    flex-direction: column;
    width: 100%;
    gap: var(--gms-space-2);
  }
  
  .nav__link {
    justify-content: center;
    padding: var(--gms-space-3);
  }

  /* Adjust underline position for mobile */
  .nav__link::after {
    bottom: 2px;
    left: 25%;
    right: 25%;
  }
  
  .nav__cta {
    margin-left: 0;
    margin-top: var(--gms-space-4);
    width: 100%;
  }
  
  .nav__cta .gms-button {
    width: 100%;
  }
}

/* Main Content */
.main {
  margin-top: 80px;
  min-height: calc(100vh - 80px);
}

/* Hero Section */
.hero {
  background: linear-gradient(135deg, var(--gms-bg-primary) 0%, var(--gms-bg-secondary) 100%);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="%23d0d0d0" stroke-width="0.5" opacity="0.3"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
  opacity: 0.5;
  z-index: 0;
}

.hero__content {
  position: relative;
  z-index: 1;
  text-align: left;
  padding: var(--gms-space-24) 0;
}

.hero__title {
  margin-bottom: var(--gms-space-6);
  color: var(--gms-text-primary);
}

.hero__subtitle {
  margin-bottom: var(--gms-space-8);
  color: var(--gms-text-secondary);
  max-width: 600px;
}

.hero__actions {
  display: flex;
  gap: var(--gms-space-4);
  justify-content: flex-start;
  flex-wrap: wrap;
}

/* Feature Grid */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(360px, 1fr));
  gap: var(--gms-space-4);
  margin-top: var(--gms-space-12);
  max-width: 1300px;
  margin-left: auto;
  margin-right: auto;
}

.feature-card {
  text-align: center;
  padding: var(--gms-space-8);
  background: var(--gms-bg-secondary);
  border-radius: var(--gms-radius-lg);
  box-shadow: var(--gms-shadow-card);
  transition: all 0.3s ease;
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--gms-shadow-card-hover);
}

.feature-card__number {
  font-size: 5rem;
  font-weight: 900;
  color: var(--gms-bright-blue);
  margin: 0 auto var(--gms-space-4);
  display: block;
  text-align: center;
  line-height: 0.9;
  letter-spacing: -0.02em;
  font-family: var(--gms-font-sans);
}

.feature-card__title {
  margin-bottom: var(--gms-space-3);
}

.feature-card__description {
  color: var(--gms-text-secondary);
}

/* Accordion Component */
.accordion-container {
  display: flex;
  flex-direction: column;
  gap: var(--gms-space-4);
}

.accordion-item {
  background: var(--gms-bg-secondary);
  border-radius: var(--gms-radius-lg);
  box-shadow: var(--gms-shadow-card);
  overflow: hidden;
  transition: all 0.3s ease;
}

.accordion-item:hover {
  box-shadow: var(--gms-shadow-card-hover);
}

.accordion-header {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--gms-space-6);
  background: none;
  border: none;
  cursor: pointer;
  text-align: left;
  transition: all 0.2s ease;
  min-height: var(--gms-touch-target-min);
}

.accordion-header:hover {
  background: rgba(0, 170, 231, 0.05);
}

.accordion-header:focus-visible {
  outline: 2px solid var(--gms-bright-blue);
  outline-offset: 2px;
}

.accordion-header h3 {
  margin: 0;
  color: var(--gms-text-primary);
}

.accordion-chevron {
  font-size: 16px;
  color: var(--gms-bright-blue);
  transition: transform 0.3s ease;
  user-select: none;
}

.accordion-header[aria-expanded="true"] .accordion-chevron {
  transform: rotate(180deg);
}

.accordion-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}

.accordion-header[aria-expanded="true"] + .accordion-content {
  max-height: 500px;
}

.accordion-panel {
  padding: 0 var(--gms-space-6) var(--gms-space-6);
}

.accordion-panel p {
  margin: 0;
  color: var(--gms-text-secondary);
}

/* Footer */
.footer {
  background: var(--gms-matte-black);
  color: var(--gms-text-inverse);
  padding: var(--gms-space-16) 0 var(--gms-space-8);
}

.footer__content {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: var(--gms-space-8);
  margin-bottom: var(--gms-space-8);
}

.footer__section--right {
  text-align: right;
}

.footer__section--right .footer__links {
  text-align: right;
}

.footer__section h3 {
  margin-bottom: var(--gms-space-4);
  color: var(--gms-text-inverse);
}

.footer__logo {
  height: 24px;
  width: auto;
  margin-bottom: var(--gms-space-4);
}

.footer__links {
  list-style: none;
  margin: 0;
  padding: 0;
}

.footer__links li {
  margin-bottom: var(--gms-space-2);
}

.footer__links a {
  color: var(--gms-silver-gray);
  text-decoration: none;
  transition: color 0.2s ease;
}

.footer__links a:hover {
  color: var(--gms-bright-blue);
}

.footer__bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--gms-space-8);
  border-top: 1px solid var(--gms-silver-gray);
  color: var(--gms-silver-gray);
}

.footer__legal {
  display: flex;
  align-items: center;
  gap: var(--gms-space-3);
}

.footer__legal a {
  color: var(--gms-silver-gray);
  text-decoration: none;
  font-size: var(--gms-body-sm);
  transition: color 0.2s ease;
}

.footer__legal a:hover {
  color: var(--gms-white);
}

.footer__legal-divider {
  color: var(--gms-silver-gray);
  opacity: 0.5;
}

/* Responsive Adjustments */
@media (max-width: 768px) {
  .hero__content {
    padding: var(--gms-space-16) 0;
  }
  
  .hero__actions {
    flex-direction: column;
    align-items: center;
  }
  
  .hero__actions .gms-button {
    width: 100%;
    max-width: 300px;
  }
  
  .feature-grid {
    grid-template-columns: 1fr;
    grid-template-rows: auto;
    max-width: none;
  }
  
  .product-cards {
    grid-template-columns: 1fr;
  }

  .how-we-help-layout {
    grid-template-columns: 1fr !important;
    gap: var(--gms-space-6) !important;
  }

  .footer__bottom {
    flex-direction: column;
    gap: var(--gms-space-4);
    text-align: center;
  }
}

/* ================================================
   CENTERED HAMBURGER NAVIGATION - Fleet-Style
   ================================================ */

/* Header Layout - 3-element grid structure */
.header__content--hamburger {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  min-height: 80px;
  padding: 0 var(--gms-space-4);
  max-width: 1200px;
  margin: 0 auto;
}

/* Logo - Left aligned in grid */
.header__content--hamburger .logo {
  justify-self: start;
}

/* Hamburger Toggle - Always visible, centered */
.nav__toggle--centered {
  justify-self: center;
  display: flex;
  background: none;
  border: none;
  cursor: pointer;
  min-height: var(--gms-touch-target-min);
  min-width: var(--gms-touch-target-min);
  align-items: center;
  justify-content: center;
  position: relative;
  z-index: 1001;
  padding: var(--gms-space-2);
  border-radius: var(--gms-radius-md);
  transition: background 0.2s ease;
  /* Safari touch fixes */
  -webkit-tap-highlight-color: transparent;
  -webkit-touch-callout: none;
  touch-action: manipulation;
}

.nav__toggle--centered:hover {
  background: rgba(255, 255, 255, 0.1);
}

.nav__toggle--centered:focus-visible {
  outline: 2px solid var(--gms-bright-blue);
  outline-offset: 2px;
}

/* 2-Line Hamburger Icon (Fleet-style) */
.nav__toggle-icon--2line {
  width: 40px;
  height: 12px;
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.nav__toggle-icon--2line .nav__toggle-line {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--gms-white);
  border-radius: 2px;
  transition: transform 0.3s ease, opacity 0.3s ease;
  transform-origin: center;
}

/* Hamburger to X animation (when overlay is open) */
.nav__toggle--centered[aria-expanded="true"] .nav__toggle-icon--2line .nav__toggle-line:nth-child(1) {
  transform: translateY(5px) rotate(45deg);
}

.nav__toggle--centered[aria-expanded="true"] .nav__toggle-icon--2line .nav__toggle-line:nth-child(2) {
  transform: translateY(-5px) rotate(-45deg);
}

/* Agent Hub CTA Button - Right aligned in grid */
.nav__cta-button {
  justify-self: end;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--gms-papaya-orange);
  color: var(--gms-matte-black);
  font-weight: var(--gms-font-semibold);
  font-size: var(--gms-body-md);
  text-decoration: none;
  padding: var(--gms-space-2) var(--gms-space-4);
  border-radius: var(--gms-radius-md);
  min-height: var(--gms-touch-target-min);
  transition: background 0.2s ease, transform 0.2s ease;
}

.nav__cta-button:hover {
  background: var(--gms-warning-600);
  transform: translateY(-1px);
}

.nav__cta-button:focus-visible {
  outline: 2px solid var(--gms-bright-blue);
  outline-offset: 2px;
}

/* ================================================
   NAVIGATION OVERLAY
   ================================================ */

.nav-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 999;
  pointer-events: none;
}

.nav-overlay[hidden] {
  display: block;
  visibility: hidden;
}

.nav-overlay:not([hidden]) {
  pointer-events: auto;
  visibility: visible;
}

/* Backdrop */
.nav-overlay__backdrop {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.nav-overlay:not([hidden]) .nav-overlay__backdrop {
  opacity: 1;
}

/* Content container - slides down from top */
.nav-overlay__content {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  background: var(--gms-gunmetal-gray);
  transform: translateY(-100%);
  transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  max-height: 100vh;
  overflow-y: auto;
}

.nav-overlay:not([hidden]) .nav-overlay__content {
  transform: translateY(0);
}

.nav-overlay__inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--gms-space-8) var(--gms-space-4);
  padding-top: calc(80px + var(--gms-space-12));
  min-height: 50vh;
}

/* Navigation Columns */
.nav-overlay__columns {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--gms-space-12);
}

.nav-overlay__column {
  padding: var(--gms-space-4) 0;
}

.nav-overlay__heading {
  font-size: var(--gms-body-sm);
  font-weight: var(--gms-font-semibold);
  color: var(--gms-silver-gray);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  margin: 0 0 var(--gms-space-6) 0;
  /* Phase 2: Staggered reveal animation */
  opacity: 0;
  transform: translateY(10px);
  transition:
    opacity 0.3s ease,
    transform 0.3s ease;
}

.nav-overlay:not([hidden]) .nav-overlay__heading {
  opacity: 1;
  transform: translateY(0);
}

.nav-overlay:not([hidden]) .nav-overlay__column:nth-child(1) .nav-overlay__heading {
  transition-delay: 0.1s;
}
.nav-overlay:not([hidden]) .nav-overlay__column:nth-child(2) .nav-overlay__heading {
  transition-delay: 0.15s;
}
.nav-overlay:not([hidden]) .nav-overlay__column:nth-child(3) .nav-overlay__heading {
  transition-delay: 0.2s;
}

.nav-overlay__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-overlay__list li {
  margin-bottom: var(--gms-space-4);
}

.nav-overlay__link {
  font-size: clamp(1.25rem, 3vw, 1.75rem);
  font-weight: var(--gms-font-medium);
  color: var(--gms-white);
  text-decoration: none;
  display: inline-block;
  padding: var(--gms-space-1) 0;
  position: relative;
  /* Phase 2: Staggered reveal animation */
  opacity: 0;
  transform: translateY(20px);
  transition:
    color 0.2s ease,
    opacity 0.4s ease,
    transform 0.4s ease;
}

/* Animate links when overlay is open */
.nav-overlay:not([hidden]) .nav-overlay__link {
  opacity: 1;
  transform: translateY(0);
}

/* Staggered delays by column */
.nav-overlay:not([hidden]) .nav-overlay__column:nth-child(1) .nav-overlay__link {
  transition-delay: 0.15s;
}
.nav-overlay:not([hidden]) .nav-overlay__column:nth-child(2) .nav-overlay__link {
  transition-delay: 0.2s;
}
.nav-overlay:not([hidden]) .nav-overlay__column:nth-child(3) .nav-overlay__link {
  transition-delay: 0.25s;
}

/* Additional stagger within each list */
.nav-overlay:not([hidden]) .nav-overlay__list li:nth-child(1) .nav-overlay__link {
  transition-delay: calc(var(--column-delay, 0.15s) + 0s);
}
.nav-overlay:not([hidden]) .nav-overlay__list li:nth-child(2) .nav-overlay__link {
  transition-delay: calc(var(--column-delay, 0.15s) + 0.05s);
}
.nav-overlay:not([hidden]) .nav-overlay__list li:nth-child(3) .nav-overlay__link {
  transition-delay: calc(var(--column-delay, 0.15s) + 0.1s);
}
.nav-overlay:not([hidden]) .nav-overlay__list li:nth-child(4) .nav-overlay__link {
  transition-delay: calc(var(--column-delay, 0.15s) + 0.15s);
}

/* Column-specific delay variables */
.nav-overlay__column:nth-child(1) { --column-delay: 0.15s; }
.nav-overlay__column:nth-child(2) { --column-delay: 0.2s; }
.nav-overlay__column:nth-child(3) { --column-delay: 0.25s; }

.nav-overlay__link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gms-bright-blue);
  transition: width 0.3s ease;
}

.nav-overlay__link:hover {
  color: var(--gms-bright-blue);
}

.nav-overlay__link:hover::after {
  width: 100%;
}

.nav-overlay__link:focus-visible {
  outline: 2px solid var(--gms-bright-blue);
  outline-offset: 4px;
}

/* Active link state */
.nav-overlay__link--active {
  color: var(--gms-bright-blue);
}

.nav-overlay__link--active::after {
  width: 100%;
}

/* Body scroll lock when nav overlay is open */
body.nav-overlay-open {
  overflow: hidden;
}

/* ================================================
   RESPONSIVE - Navigation Overlay
   ================================================ */

@media (max-width: 768px) {
  .header__content--hamburger {
    padding: 0 var(--gms-space-3);
  }

  .nav__cta-button {
    padding: var(--gms-space-2) var(--gms-space-3);
    font-size: var(--gms-body-sm);
  }

  .nav-overlay__columns {
    grid-template-columns: 1fr;
    gap: var(--gms-space-8);
  }

  .nav-overlay__inner {
    padding: var(--gms-space-6) var(--gms-space-4);
    padding-top: calc(80px + var(--gms-space-8));
  }

  .nav-overlay__link {
    font-size: 1.25rem;
  }
}

@media (max-width: 480px) {
  .logo__image {
    height: 36px;
  }

  .nav__cta-button {
    padding: var(--gms-space-1) var(--gms-space-2);
    font-size: 0.8rem;
  }
}