/* Header-specific styles for Field Visionary */

.fv-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(18px);
  background: linear-gradient(180deg, rgba(5, 7, 11, 0.96), rgba(5, 7, 11, 0.9));
  border-bottom: 1px solid var(--color-border-strong);
}

.fv-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1.25rem;
  min-height: 3.5rem;
}

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

.fv-header__brand {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-family: var(--font-display);
  font-size: 0.9rem;
  color: var(--color-text);
}

.fv-header__brand-mark {
  width: 26px;
  height: 26px;
  border-radius: 999px;
  border: 1px solid rgba(148, 163, 184, 0.6);
  background:
    radial-gradient(circle at 30% 10%, rgba(56, 189, 248, 0.8), transparent 55%),
    radial-gradient(circle at 70% 90%, rgba(34, 197, 94, 0.9), transparent 55%),
    #020617;
  box-shadow: 0 0 18px rgba(56, 189, 248, 0.8);
}

.fv-header__brand-text span {
  color: var(--color-primary);
}

/* Navigation */

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

.fv-header__nav-list {
  display: flex;
  align-items: center;
  gap: 1.75rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.fv-header__nav-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  font-size: 0.8rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-text-soft);
}

.fv-header__nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -0.3rem;
  width: 0;
  height: 1px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  transition: width var(--transition-mid);
}

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

.fv-header__nav-link:hover::after,
.fv-header__nav-link:focus-visible::after {
  width: 100%;
}

.fv-header__nav-link--active {
  color: var(--color-primary);
}

.fv-header__nav-link--active::after {
  width: 100%;
}

.fv-header__cta-wrapper {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.fv-header__cta {
  font-size: 0.75rem;
  padding-inline: 1.1rem;
  padding-block: 0.55rem;
}

/* Mobile toggle */

.fv-header__toggle {
  display: none;
  position: relative;
  width: 40px;
  height: 34px;
  border-radius: var(--radius-md);
  border: 1px solid rgba(148, 163, 184, 0.5);
  background: rgba(15, 23, 42, 0.85);
  justify-content: center;
  align-items: center;
  flex-direction: column;
  gap: 4px;
  cursor: pointer;
  color: var(--color-text);
}

.fv-header__toggle-bar {
  width: 18px;
  height: 2px;
  border-radius: 999px;
  background: var(--color-text);
  transition: transform var(--transition-mid), opacity var(--transition-mid);
}

/* Toggle active state */

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

.fv-header__toggle--open .fv-header__toggle-bar:nth-child(2) {
  opacity: 0;
}

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

/* Responsive behavior */

@media (max-width: 900px) {
  .fv-header__toggle {
    display: inline-flex;
  }

  .fv-header__nav {
    position: absolute;
    top: 100%;
    right: 0;
    left: 0;
    background: radial-gradient(circle at top, rgba(56, 189, 248, 0.16), transparent 55%),
      rgba(5, 7, 11, 0.98);
    border-bottom: 1px solid var(--color-border-subtle);
    padding-inline: 1.25rem;
    padding-bottom: 0.9rem;
    flex-direction: column;
    align-items: flex-start;
    gap: 0.75rem;
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    transform: translateY(-6px);
    pointer-events: none;
    transition: max-height var(--transition-slow), opacity var(--transition-mid), transform var(--transition-mid);
  }

  .fv-header__nav-list {
    width: 100%;
    flex-direction: column;
    gap: 0.35rem;
    padding-top: 0.5rem;
  }

  .fv-header__nav-item {
    width: 100%;
  }

  .fv-header__nav-link {
    width: 100%;
    padding-block: 0.45rem;
  }

  .fv-header__cta-wrapper {
    width: 100%;
    justify-content: flex-start;
    padding-top: 0.25rem;
  }

  .fv-header__nav--open {
    max-height: 420px;
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
  }
}

@media (max-width: 600px) {
  .fv-header__inner {
    padding-inline: 1rem;
  }

  .fv-header__brand-text {
    font-size: 0.8rem;
  }

  .fv-header__cta-wrapper {
    flex-direction: column;
    align-items: stretch;
  }
}