/* Header styles for Cis B.V. */

.ulb-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: linear-gradient(to bottom, rgba(5, 6, 9, 0.96), rgba(5, 6, 9, 0.9));
  backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--color-border-subtle);
}

.ulb-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: var(--space-3);
  gap: var(--space-4);
}

/* Brand */
.ulb-header__brand {
  flex: 0 0 auto;
}

.ulb-header__logo-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  color: var(--color-text);
}

.ulb-header__logo-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.3rem;
  height: 2.3rem;
  border-radius: 0.9rem;
  background: radial-gradient(circle at 30% 0, rgba(255, 75, 92, 0.8), transparent 60%),
              radial-gradient(circle at 70% 100%, rgba(18, 199, 255, 0.7), transparent 60%),
              #111217;
  box-shadow: var(--shadow-soft);
  font-size: var(--font-size-xs);
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.ulb-header__brand-text {
  display: flex;
  flex-direction: column;
}

.ulb-header__brand-name {
  font-family: var(--font-display);
  font-size: var(--font-size-lg);
  line-height: var(--line-height-tight);
}

.ulb-header__brand-tagline {
  font-size: var(--font-size-xs);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--color-text-muted);
}

/* Navigation */
.ulb-header__nav {
  flex: 1 1 auto;
}

.ulb-header__nav-list {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--space-4);
}

.ulb-header__nav-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  padding-inline: 0.1rem;
  padding-block: 0.2rem;
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color var(--transition-base);
}

.ulb-header__nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -0.25rem;
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--color-primary), #12c7ff);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform var(--transition-base);
}

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

.ulb-header__nav-link:hover::after,
.ulb-header__nav-link:focus-visible::after {
  transform: scaleX(1);
}

.ulb-header__nav-item--cta .ulb-header__nav-link--cta {
  padding-inline: 1rem;
  padding-block: 0.45rem;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(255, 75, 92, 0.7);
  background: radial-gradient(circle at top left, rgba(255, 75, 92, 0.5), transparent 60%),
              radial-gradient(circle at bottom right, rgba(18, 199, 255, 0.4), transparent 60%),
              rgba(0, 0, 0, 0.7);
  color: #fff;
  box-shadow: var(--shadow-soft);
}

.ulb-header__nav-item--cta .ulb-header__nav-link--cta::after {
  display: none;
}

.ulb-header__nav-item--cta .ulb-header__nav-link--cta:hover,
.ulb-header__nav-item--cta .ulb-header__nav-link--cta:focus-visible {
  border-color: var(--color-primary-hover);
  box-shadow: var(--shadow-glow-primary);
}

/* Mobile toggle */
.ulb-header__toggle {
  display: none;
  position: relative;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(10, 10, 14, 0.9);
  cursor: pointer;
  align-items: center;
  justify-content: center;
  padding: 0;
}

.ulb-header__toggle-bar {
  position: relative;
  width: 1.3rem;
  height: 2px;
  background: #fff;
  border-radius: 999px;
  transition: transform var(--transition-base), opacity var(--transition-base), top var(--transition-base);
}

.ulb-header__toggle-bar + .ulb-header__toggle-bar {
  top: -0.25rem;
}

.ulb-header__toggle--open .ulb-header__toggle-bar:first-child {
  transform: rotate(45deg) translateY(2px);
}

.ulb-header__toggle--open .ulb-header__toggle-bar:last-child {
  transform: rotate(-45deg) translateY(-2px);
}

/* Mobile layout */
@media (max-width: 768px) {
  .ulb-header__inner {
    padding-block: var(--space-2);
  }

  .ulb-header__toggle {
    display: inline-flex;
    flex-direction: column;
  }

  .ulb-header__nav {
    position: absolute;
    inset-inline: 0;
    top: 100%;
    background: radial-gradient(circle at top, rgba(255, 75, 92, 0.16), transparent 60%),
                radial-gradient(circle at bottom, rgba(18, 199, 255, 0.14), transparent 60%),
                #050609;
    border-bottom: 1px solid var(--color-border-subtle);
    transform-origin: top;
    transform: scaleY(0.96);
    opacity: 0;
    visibility: hidden;
    max-height: 0;
    overflow: hidden;
    transition: opacity var(--transition-base), transform var(--transition-base), max-height var(--transition-base), visibility var(--transition-base);
  }

  .ulb-header__nav-list {
    flex-direction: column;
    align-items: flex-start;
    padding: var(--space-3) var(--space-4) var(--space-4);
    gap: var(--space-3);
  }

  .ulb-header__nav-item--cta {
    width: 100%;
  }

  .ulb-header__nav-item--cta .ulb-header__nav-link--cta {
    justify-content: center;
    width: 100%;
    text-align: center;
  }

  .ulb-header__nav-link {
    font-size: var(--font-size-base);
  }

  .ulb-header__nav--open {
    opacity: 1;
    visibility: visible;
    transform: scaleY(1);
    max-height: 420px;
  }
}

@media (max-width: 480px) {
  .ulb-header__brand-tagline {
    display: none;
  }
}