header.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  border-bottom: 1px solid var(--border-hairline);
  background: rgba(6, 9, 14, 0.88);
  backdrop-filter: blur(20px);
}

.header-container,
.page-container,
.footer-container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
}

.header-container {
  position: relative;
  min-height: clamp(4rem, 9vw, 5.25rem);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.6rem var(--space-container-x);
}

nav.main-nav {
  display: flex;
  align-items: center;
  gap: clamp(1.1rem, 2.2vw, 1.85rem);
}

.page-container {
  flex: 1;
  padding: var(--space-section) var(--space-container-x);
}

.section-block {
  position: relative;
  padding: var(--space-section) 0;
  border-bottom: 1px solid var(--border-hairline);
}

.section-block:first-child {
  padding-top: 0;
}

.section-block:last-child {
  border-bottom: 0;
}

.grid-split-7-5 {
  display: grid;
  grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  align-items: center;
  gap: clamp(2rem, 5vw, 3.5rem);
}

.grid-3-col,
.grid-2-col {
  display: grid;
  gap: clamp(1.25rem, 3vw, 1.75rem);
}

.grid-3-col {
  grid-template-columns: repeat(auto-fit, minmax(min(260px, 100%), 1fr));
}

.grid-2-col {
  grid-template-columns: repeat(auto-fit, minmax(min(280px, 100%), 1fr));
}

footer.site-footer {
  margin-top: auto;
  padding: 4rem var(--space-container-x) 2.5rem;
  border-top: 1px solid var(--border-hairline);
  background: #04070c;
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(180px, 100%), 1fr));
  gap: clamp(1.75rem, 4vw, 2.5rem);
  font-size: 0.88rem;
}

.content-narrow {
  max-width: 780px;
  margin-inline: auto;
}

.content-lead {
  max-width: 800px;
}

.section-intro {
  margin-bottom: 2.5rem;
}

.stack-top {
  margin-top: 2rem;
}

.stack-top-sm {
  margin-top: 1rem;
}

.flow-panel-spaced {
  margin-top: 1.5rem;
}

.copy-spaced {
  margin-bottom: 2.5rem;
}

.card-span-2 {
  grid-column: span 2;
}

.action-row {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 2rem;
}

.action-row-centered {
  justify-content: center;
  margin-top: 0;
}

.cta-section {
  padding: clamp(3rem, 8vw, 4.5rem) clamp(1.25rem, 5vw, 2rem);
  border: 1px solid var(--border-active);
  border-radius: 8px;
  background: var(--bg-card);
  text-align: center;
}

.cta-copy {
  max-width: 700px;
  margin: 0 auto 2rem;
}

@media (max-width: 860px) {
  .nav-toggle {
    display: flex;
  }

  nav.main-nav {
    position: absolute;
    top: 100%;
    right: 0;
    left: 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 0.5rem 0;
    border-bottom: 1px solid var(--border-hairline);
    background: var(--bg-surface);
    box-shadow: 0 16px 40px rgba(0, 0, 0, 0.6);
  }

  nav.main-nav.is-open {
    display: flex;
  }

  nav.main-nav a,
  .dropdown-trigger {
    /*width: 100%;*/
    padding: 0.9rem var(--space-container-x);
    font-size: 1rem;
  }

  .btn-nav-contact {
    width: auto;
    margin: 0.5rem var(--space-container-x);
  }

  .nav-dropdown {
    width: 100%;
  }

  .dropdown-content {
    position: static;
    width: 100%;
    min-width: 0;
    max-width: none;
    border: 0;
    border-radius: 0;
    background: rgba(255, 255, 255, 0.02);
    box-shadow: none;
  }

  .dropdown-content a {
    padding-left: calc(var(--space-container-x) + 1rem);
  }
}

@media (max-width: 700px) {
  .grid-split-7-5 {
    grid-template-columns: minmax(0, 1fr);
  }

  .card-span-2 {
    grid-column: auto;
  }
}

@media (max-width: 480px) {
  .action-row > .btn-primary,
  .action-row > .btn-secondary {
    width: 100%;
  }

  footer.site-footer {
    padding-top: 3rem;
  }
}