.gtr-header {
  position: sticky;
  top: 0;
  z-index: 49;
  backdrop-filter: blur(22px);
  -webkit-backdrop-filter: blur(22px);
  background: linear-gradient(to bottom, rgba(5, 6, 10, 0.96), rgba(5, 6, 10, 0.88));
  border-bottom: 1px solid rgba(148, 163, 184, 0.35);
}

.gtr-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: 0.9rem;
  gap: 1.5rem;
  position: relative;
}

.gtr-header__brand {
  display: flex;
  align-items: center;
}

.gtr-header__logo-link {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--font-display);
  font-size: 1.1rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.gtr-header__logo-mark {
  width: 32px;
  height: 32px;
  border-radius: 999px;
  background:
    radial-gradient(circle at 30% 0%, rgba(255, 255, 255, 0.25), transparent 60%),
    radial-gradient(circle at 30% 120%, rgba(239, 68, 68, 0.8), transparent 60%),
    radial-gradient(circle at 70% -20%, rgba(59, 130, 246, 0.7), transparent 60%),
    linear-gradient(135deg, #020617, #111827);
  box-shadow: 0 0 0 2px rgba(248, 250, 252, 0.08), var(--shadow-sm);
  position: relative;
}

.gtr-header__logo-mark::after {
  content: "";
  position: absolute;
  inset: 30%;
  border-radius: 999px;
  border: 2px solid rgba(248, 250, 252, 0.7);
}

.gtr-header__logo-text {
  font-weight: 600;
}

.gtr-header__nav {
  display: flex;
  align-items: center;
  gap: 1.75rem;
}

.gtr-header__nav-list {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  list-style: none;
}

.gtr-header__nav-link {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--color-text-soft);
}

.gtr-header__nav-link:hover,
.gtr-header__nav-link:focus-visible {
  color: var(--color-text);
}

.gtr-header__cta-wrapper {
  display: flex;
  align-items: center;
}

.gtr-header__cta {
  font-size: 0.78rem;
}

.gtr-header__toggle {
  display: none;
  position: relative;
  width: 42px;
  height: 42px;
  border-radius: 999px;
  border: 1px solid rgba(148, 163, 184, 0.6);
  background: rgba(15, 23, 42, 0.95);
  color: inherit;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  transition: background-color var(--transition-base), border-color var(--transition-base), transform var(--transition-fast), box-shadow var(--transition-base);
}

.gtr-header__toggle:hover,
.gtr-header__toggle:focus-visible {
  background: rgba(15, 23, 42, 1);
  border-color: rgba(248, 250, 252, 0.8);
  box-shadow: var(--shadow-sm);
}

.gtr-header__toggle-bar {
  width: 18px;
  height: 2px;
  border-radius: 999px;
  background: var(--color-gray-100);
  transition: transform var(--transition-base), opacity var(--transition-base), translate var(--transition-base);
}

.gtr-header__toggle.is-active .gtr-header__toggle-bar:nth-child(1) {
  transform: translateY(4px) rotate(45deg);
}

.gtr-header__toggle.is-active .gtr-header__toggle-bar:nth-child(2) {
  opacity: 0;
}

.gtr-header__toggle.is-active .gtr-header__toggle-bar:nth-child(3) {
  transform: translateY(-4px) rotate(-45deg);
}

.gtr-header__nav--open {
  transform: translateY(0);
  opacity: 1;
  visibility: visible;
}

@media (max-width: 880px) {
  .gtr-header__toggle {
    display: inline-flex;
  }

  .gtr-header__nav {
    position: absolute;
    inset-inline: 0;
    top: 100%;
    margin-top: 0.4rem;
    padding-inline: 1.5rem;
    padding-block: 0.9rem 1rem;
    background: radial-gradient(circle at 0% 0%, rgba(255, 22, 61, 0.95), transparent 60%), rgba(15, 23, 42, 0.98);
    border-bottom: 1px solid rgba(148, 163, 184, 0.4);
    border-top: 1px solid rgba(15, 23, 42, 0.9);
    box-shadow: var(--shadow-md);
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
    transform: translateY(-8px);
    opacity: 0;
    visibility: hidden;
    transition: transform var(--transition-base), opacity var(--transition-base), visibility var(--transition-base);
  }

  .gtr-header__nav-list {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.75rem;
  }

  .gtr-header__nav-link {
    font-size: 0.9rem;
    color: white;
  }

  .gtr-header__cta-wrapper {
    width: 100%;
  }

  .gtr-header__cta {
    width: 100%;
    justify-content: center;
  }
}

@media (max-width: 480px) {
  .gtr-header__logo-text {
    font-size: 0.85rem;
  }
}


@media (max-width: 880px) {
  .gtr-header .gtr-header__nav.gtr-header__nav--open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
  }
}