.umn-header {
  position: sticky;
  top: 0;
  z-index: 40;
  width: 100%;
  backdrop-filter: blur(16px);
  background: linear-gradient(90deg, rgba(5,6,9,0.96), rgba(16,19,26,0.96));
  border-bottom: 1px solid var(--color-border-subtle);
}

.umn-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 64px;
  padding-top: var(--space-3);
  padding-bottom: var(--space-3);
}

.umn-header__branding {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

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

.umn-header__logo-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-lg);
  background: radial-gradient(circle at 20% 0, rgba(255,59,106,0.9), rgba(5,6,9,1));
  box-shadow: var(--shadow-glow-primary);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.9rem;
  letter-spacing: 0.12em;
}

.umn-header__logo-text {
  display: flex;
  flex-direction: column;
}

.umn-header__logo-name {
  font-family: var(--font-display);
  font-size: var(--font-size-lg);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.umn-header__logo-tagline {
  font-size: var(--font-size-xs);
  text-transform: uppercase;
  color: var(--color-text-muted);
  letter-spacing: 0.16em;
}

.umn-header__nav {
  display: flex;
}

.umn-header__nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  list-style: none;
  margin: 0;
  padding: 0;
}

.umn-header__nav-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  font-size: var(--font-size-sm);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-text-muted);
  padding: 0.25rem 0;
}

.umn-header__nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -4px;
  width: 0;
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-primary-strong));
  transition: width var(--transition-base);
}

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

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

.umn-header__nav-link--cta {
  padding: 0.4rem 1rem;
  border-radius: var(--radius-full);
  border: 1px solid rgba(255,255,255,0.12);
  background: radial-gradient(circle at 0 0, rgba(255,59,106,0.4), rgba(16,19,26,1));
  box-shadow: var(--shadow-xs);
  color: #fff;
}

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

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

.umn-header__nav-item--cta {
  margin-left: var(--space-2);
}

/* Mobile toggle */

.umn-header__toggle {
  display: none;
  position: relative;
  width: 40px;
  height: 36px;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border-subtle);
  background: rgba(5,6,9,0.85);
  cursor: pointer;
}

.umn-header__toggle-bar {
  position: absolute;
  left: 8px;
  right: 8px;
  height: 2px;
  border-radius: 999px;
  background: var(--color-text);
  transition: transform var(--transition-base), opacity var(--transition-base), top var(--transition-base), bottom var(--transition-base);
}

.umn-header__toggle-bar:nth-child(1) {
  top: 10px;
}

.umn-header__toggle-bar:nth-child(2) {
  top: 17px;
}

.umn-header__toggle-bar:nth-child(3) {
  bottom: 9px;
}

.umn-header__toggle[aria-expanded="true"] .umn-header__toggle-bar:nth-child(1) {
  top: 17px;
  transform: rotate(45deg);
}

.umn-header__toggle[aria-expanded="true"] .umn-header__toggle-bar:nth-child(2) {
  opacity: 0;
}

.umn-header__toggle[aria-expanded="true"] .umn-header__toggle-bar:nth-child(3) {
  bottom: 17px;
  transform: rotate(-45deg);
}

/* Mobile layout */

@media (max-width: 768px) {
  .umn-header__inner {
    min-height: 60px;
  }

  .umn-header__toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }

  .umn-header__nav {
    position: absolute;
    inset-inline: 0;
    top: 100%;
    background: radial-gradient(circle at top left, rgba(255,59,106,0.12), transparent 60%), rgba(5,6,9,0.98);
    border-bottom: 1px solid var(--color-border-subtle);
    transform-origin: top;
    transform: scaleY(1);
  }

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

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

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

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

  .umn-header__nav[hidden] {
    display: block;
    transform: scaleY(0);
    height: 0;
    overflow: hidden;
  }

  .umn-header__nav.umn-header__nav--open {
    transform: scaleY(1);
    height: auto;
  }
}

@media (max-width: 520px) {
  .umn-header__logo-tagline {
    display: none;
  }
}