.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  width: 100%;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  padding: 1.75rem 2.5rem;
  background: rgba(7, 19, 31, 0.92);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

.brand-group {
  flex: 0 0 auto;
}

.brand-group {
  display: grid;
  gap: 0.35rem;
}

.brand-logo {
  display: inline-flex;
  align-items: center;
}

.brand-logo-img {
  height: 44px;
  width: auto;
  display: block;
  object-fit: contain;
}

.brand-subtitle {
  color: var(--muted);
  font-size: 0.88rem;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 1.6rem;
}

.site-nav a {
  color: var(--muted);
  font-size: 0.95rem;
  font-weight: 500;
  transition: color 0.22s ease;
}

.site-nav a:hover,
.site-nav a.active,
.site-nav a.cta-link {
  color: var(--text);
}

.site-nav a.cta-link {
  padding: 0.95rem 1.45rem;
  background: rgba(122, 210, 159, 0.1);
  border-radius: 999px;
}

.nav-toggle {
  display: none;
}

.nav-toggle-button {
  display: none;
  align-items: center;
  justify-content: center;
  width: 2.75rem;
  height: 2.75rem;
  padding: 0.6rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

@media (max-width: 900px) {
  .site-header {
    padding: 1.25rem 1.5rem;
  }

  .site-nav {
    gap: 1.1rem;
  }
}

.page-main {
  padding-top: clamp(5.5rem, 7vw, 6.75rem);
}

@media (max-width: 720px) {
  .site-header {
    position: fixed !important;
    top: 0;
    left: 0;
    right: 0;
    width: 100%;
    z-index: 9999;
    flex-wrap: nowrap;
    justify-content: space-between;
    background: rgba(7, 19, 31, 0.98);
    backdrop-filter: blur(18px);
    padding: 1rem 1.25rem;
  }

  .page-main {
    padding-top: 5.25rem;
    position: relative;
    z-index: 1;
  }

  .brand-group {
    flex: 1 1 auto;
  }

  .brand-logo-img {
    height: 38px;
  }

  .nav-toggle {
    display: block;
    position: absolute;
    opacity: 0;
    pointer-events: none;
  }

  .nav-toggle-button {
    display: inline-flex;
    flex-direction: column;
    gap: 0.35rem;
    width: 2.7rem;
    height: 2.7rem;
    cursor: pointer;
    z-index: 22;
    margin-left: auto;
  }

  .nav-toggle-button span {
    display: block;
    height: 2px;
    width: 100%;
    border-radius: 999px;
    background: var(--text);
    transition: transform 0.25s ease, opacity 0.25s ease;
  }

  .nav-toggle:checked + .nav-toggle-button span:nth-child(1) {
    transform: translateY(5px) rotate(45deg);
  }

  .nav-toggle:checked + .nav-toggle-button span:nth-child(2) {
    opacity: 0;
  }

  .nav-toggle:checked + .nav-toggle-button span:nth-child(3) {
    transform: translateY(-5px) rotate(-45deg);
  }

  .site-nav {
    position: absolute;
    top: calc(100% + 0.7rem);
    right: 1rem;
    left: 1rem;
    width: auto;
    flex-direction: column;
    align-items: flex-start;
    padding: 1.25rem;
    background: rgba(7, 19, 31, 0.98);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 24px;
    gap: 0.7rem;
    opacity: 0;
    transform: translateY(-10px);
    pointer-events: none;
    transition: opacity 0.25s ease, transform 0.25s ease;
    box-shadow: 0 20px 45px rgba(0, 0, 0, 0.24);
  }

  .site-nav a {
    width: 100%;
    padding: 0.8rem 0.9rem;
    border-radius: 16px;
  }

  .nav-toggle:checked + .nav-toggle-button + .site-nav {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
  }
}