/* ============================================
   EtaleHub Layout
   Navigation, Footer, Grid, Containers
   ============================================ */

/* ---------- Container ---------- */
.container {
  width: 100%;
  max-width: var(--container-xl);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

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

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

@media (max-width: 639px) {
  .container {
    padding: 0 var(--space-4);
  }
}

/* ---------- Sections ---------- */
.section {
  padding: var(--space-20) 0;
}

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

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

.section-dark {
  background: var(--navy-900);
}

.section-alt {
  background: var(--slate-50);
}

.section-gradient {
  background: linear-gradient(180deg, var(--navy-900) 0%, var(--navy-800) 100%);
}

@media (max-width: 639px) {
  .section {
    padding: var(--space-12) 0;
  }

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

/* ---------- Grid ---------- */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-8);
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-8);
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-6);
}

.grid-6 {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: var(--space-4);
}

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

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

  .grid-6 {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 639px) {
  .grid-2 {
    grid-template-columns: 1fr;
  }

  .grid-3 {
    grid-template-columns: 1fr;
  }

  .grid-4 {
    grid-template-columns: 1fr;
  }

  .grid-6 {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ---------- Navigation ---------- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-nav);
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid transparent;
  transition: all var(--duration-normal) var(--ease-default);
}

.nav.scrolled {
  background: rgba(255, 255, 255, 0.95);
  border-bottom-color: var(--border-default);
  box-shadow: var(--shadow-sm);
}

/* Dark nav variant (for dark hero pages) */
.nav-dark {
  background: rgba(11, 20, 38, 0.85);
}

.nav-dark.scrolled {
  background: rgba(11, 20, 38, 0.95);
  border-bottom-color: var(--border-dark);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  max-width: var(--container-xl);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

@media (max-width: 639px) {
  .nav__inner {
    height: 64px;
    padding: 0 var(--space-4);
  }
}

/* Logo */
.nav__logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-display);
  font-weight: var(--font-extrabold);
  font-size: var(--text-xl);
  color: var(--text-primary);
  text-decoration: none;
  z-index: var(--z-nav);
}

.nav-dark .nav__logo {
  color: var(--white);
}

.nav__logo-icon {
  width: 32px;
  height: 32px;
  background: linear-gradient(135deg, var(--blue-500), var(--teal-500));
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--white);
  font-size: var(--text-sm);
  font-weight: var(--font-bold);
}

/* Desktop Menu */
.nav__menu {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.nav__link {
  display: inline-flex;
  align-items: center;
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--text-secondary);
  border-radius: var(--radius-md);
  transition: all var(--duration-fast) var(--ease-default);
  text-decoration: none;
  white-space: nowrap;
}

.nav__link:hover {
  color: var(--text-primary);
  background: var(--slate-100);
}

.nav__link.active {
  color: var(--blue-500);
  font-weight: var(--font-semibold);
}

.nav-dark .nav__link {
  color: var(--text-on-dark-muted);
}

.nav-dark .nav__link:hover {
  color: var(--white);
  background: rgba(255, 255, 255, 0.1);
}

/* Dropdown */
.nav__dropdown {
  position: relative;
}

.nav__dropdown-menu {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(8px);
  min-width: 220px;
  background: var(--white);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  padding: var(--space-2);
  opacity: 0;
  visibility: hidden;
  transition: all var(--duration-normal) var(--ease-default);
  z-index: var(--z-nav);
}

.nav__dropdown:hover .nav__dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

.nav__dropdown-item {
  display: block;
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-sm);
  color: var(--text-secondary);
  border-radius: var(--radius-md);
  transition: all var(--duration-fast) var(--ease-default);
  text-decoration: none;
}

.nav__dropdown-item:hover {
  background: var(--slate-100);
  color: var(--text-primary);
}

/* Nav CTA */
.nav__cta {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

/* Mobile menu toggle */
.nav__toggle {
  display: none;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  z-index: var(--z-nav);
  border-radius: var(--radius-md);
  transition: background var(--duration-fast) var(--ease-default);
}

.nav__toggle:hover {
  background: var(--slate-100);
}

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

.nav__toggle-bar {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 1px;
  transition: all var(--duration-normal) var(--ease-default);
  position: relative;
}

.nav-dark .nav__toggle-bar {
  background: var(--white);
}

.nav__toggle-bar::before,
.nav__toggle-bar::after {
  content: '';
  position: absolute;
  width: 100%;
  height: 100%;
  background: inherit;
  border-radius: inherit;
  left: 0;
  transition: all var(--duration-normal) var(--ease-default);
}

.nav__toggle-bar::before {
  top: -6px;
}

.nav__toggle-bar::after {
  top: 6px;
}

/* Hamburger → X animation */
.nav__toggle.active .nav__toggle-bar {
  background: transparent;
}

.nav__toggle.active .nav__toggle-bar::before {
  top: 0;
  transform: rotate(45deg);
  background: var(--text-primary);
}

.nav__toggle.active .nav__toggle-bar::after {
  top: 0;
  transform: rotate(-45deg);
  background: var(--text-primary);
}

/* Mobile menu */
@media (max-width: 1023px) {
  .nav__toggle {
    display: flex;
  }

  .nav__menu {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--white);
    flex-direction: column;
    align-items: stretch;
    justify-content: center;
    padding: var(--space-8);
    gap: var(--space-1);
    opacity: 0;
    visibility: hidden;
    transition: all var(--duration-normal) var(--ease-default);
    z-index: calc(var(--z-nav) - 1);
  }

  .nav-dark .nav__menu {
    background: var(--navy-900);
  }

  .nav__menu.open {
    opacity: 1;
    visibility: visible;
  }

  .nav__link {
    font-size: var(--text-lg);
    padding: var(--space-4);
    justify-content: center;
  }

  .nav__dropdown-menu {
    position: static;
    transform: none;
    opacity: 1;
    visibility: visible;
    box-shadow: none;
    border: none;
    padding: 0;
    padding-left: var(--space-6);
    min-width: auto;
  }

  .nav__cta {
    flex-direction: column;
    padding-top: var(--space-6);
  }

  .nav__cta .btn {
    width: 100%;
    justify-content: center;
  }
}

/* ---------- Footer ---------- */
.footer {
  background: var(--navy-900);
  color: var(--text-on-dark-muted);
  padding: var(--space-16) 0 var(--space-8);
}

.footer__grid {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: var(--space-12);
  margin-bottom: var(--space-12);
}

.footer__brand {
  max-width: 300px;
}

.footer__logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-display);
  font-weight: var(--font-extrabold);
  font-size: var(--text-xl);
  color: var(--white);
  margin-bottom: var(--space-4);
  text-decoration: none;
}

.footer__desc {
  font-size: var(--text-sm);
  color: var(--text-on-dark-muted);
  line-height: var(--leading-relaxed);
  margin-bottom: var(--space-6);
}

.footer__social {
  display: flex;
  gap: var(--space-3);
}

.footer__social-link {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.05);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-on-dark-muted);
  transition: all var(--duration-fast) var(--ease-default);
  text-decoration: none;
}

.footer__social-link:hover {
  background: rgba(255, 255, 255, 0.1);
  color: var(--white);
}

.footer__heading {
  font-family: var(--font-body);
  font-weight: var(--font-semibold);
  font-size: var(--text-sm);
  color: var(--white);
  margin-bottom: var(--space-5);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wider);
}

.footer__links {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.footer__link {
  font-size: var(--text-sm);
  color: var(--text-on-dark-muted);
  transition: color var(--duration-fast) var(--ease-default);
  text-decoration: none;
}

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

.footer__bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-8);
  border-top: 1px solid var(--border-dark);
  font-size: var(--text-xs);
  color: var(--slate-500);
}

.footer__bottom-links {
  display: flex;
  gap: var(--space-6);
}

.footer__bottom-links a {
  color: var(--slate-500);
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-default);
}

.footer__bottom-links a:hover {
  color: var(--text-on-dark-muted);
}

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

  .footer__brand {
    grid-column: span 2;
    max-width: none;
  }
}

@media (max-width: 639px) {
  .footer__grid {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }

  .footer__brand {
    grid-column: span 1;
  }

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

/* ---------- Hero Layout ---------- */
.hero {
  padding-top: calc(72px + var(--space-16));
  padding-bottom: var(--space-16);
  min-height: min(100vh, 900px);
  display: flex;
  align-items: center;
}

.hero-dark {
  background: var(--navy-900);
  position: relative;
  overflow: hidden;
}

.hero-dark::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 60%;
  height: 100%;
  background: radial-gradient(ellipse, rgba(59, 130, 246, 0.08) 0%, transparent 70%);
  pointer-events: none;
}

.hero-dark::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: -10%;
  width: 40%;
  height: 80%;
  background: radial-gradient(ellipse, rgba(20, 184, 166, 0.06) 0%, transparent 70%);
  pointer-events: none;
}

.hero__content {
  position: relative;
  z-index: 1;
}

.hero__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-12);
  align-items: center;
}

.hero__text {
  max-width: 560px;
}

.hero__badge {
  margin-bottom: var(--space-6);
}

.hero__title {
  margin-bottom: var(--space-6);
}

.hero__subtitle {
  font-size: var(--text-lg);
  color: var(--text-on-dark-muted);
  margin-bottom: var(--space-8);
  line-height: var(--leading-relaxed);
}

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

.hero__visual {
  position: relative;
}

@media (max-width: 1023px) {
  .hero {
    padding-top: calc(64px + var(--space-10));
    padding-bottom: var(--space-10);
    min-height: auto;
  }

  .hero__grid {
    grid-template-columns: 1fr;
    gap: var(--space-10);
  }

  .hero__text {
    max-width: none;
    text-align: center;
  }

  .hero__actions {
    justify-content: center;
  }
}

@media (max-width: 639px) {
  .hero__actions {
    flex-direction: column;
  }

  .hero__actions .btn {
    width: 100%;
    justify-content: center;
  }
}

/* ---------- Page header (inner pages) ---------- */
.page-header {
  padding-top: calc(72px + var(--space-12));
  padding-bottom: var(--space-12);
  text-align: center;
}

.page-header-dark {
  background: var(--navy-900);
}

.page-header__breadcrumb {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  color: var(--text-muted);
  margin-bottom: var(--space-6);
}

.page-header__breadcrumb a {
  color: var(--text-muted);
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-default);
}

.page-header__breadcrumb a:hover {
  color: var(--blue-500);
}

.page-header h1 {
  margin-bottom: var(--space-4);
}

.page-header p {
  font-size: var(--text-lg);
  max-width: 640px;
  margin: 0 auto;
}

@media (max-width: 639px) {
  .page-header {
    padding-top: calc(64px + var(--space-8));
    padding-bottom: var(--space-8);
  }
}

/* ---------- Two-column content ---------- */
.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-12);
  align-items: center;
}

.split--reverse {
  direction: rtl;
}

.split--reverse > * {
  direction: ltr;
}

@media (max-width: 1023px) {
  .split {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }

  .split--reverse {
    direction: ltr;
  }
}

/* ---------- CTA Section ---------- */
.cta-section {
  background: linear-gradient(135deg, var(--navy-900) 0%, var(--navy-800) 50%, #1a2744 100%);
  padding: var(--space-20) 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(circle at 30% 50%, rgba(59, 130, 246, 0.1) 0%, transparent 50%),
              radial-gradient(circle at 70% 50%, rgba(20, 184, 166, 0.08) 0%, transparent 50%);
  pointer-events: none;
}

.cta-section__content {
  position: relative;
  z-index: 1;
  max-width: 640px;
  margin: 0 auto;
}

.cta-section h2 {
  color: var(--white);
  margin-bottom: var(--space-4);
}

.cta-section p {
  color: var(--text-on-dark-muted);
  font-size: var(--text-lg);
  margin-bottom: var(--space-8);
}