.uf-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(20px);
  background: linear-gradient(to bottom, rgba(5, 7, 22, 0.96), rgba(5, 7, 22, 0.86));
  border-bottom: 1px solid var(--color-border-subtle);
}

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

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

.uf-header__logo-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  color: var(--color-gray-50);
}

.uf-header__logo-mark {
  width: 40px;
  height: 40px;
  border-radius: 30%;
  background: conic-gradient(from 210deg, #7c5cff, #ff4b6e, #3dd68c, #7c5cff);
  box-shadow: var(--shadow-glow-primary);
  position: relative;
  overflow: hidden;
}

.uf-header__logo-mark::after {
  content: "UF";
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-heading);
  font-size: 0.85rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: #050716;
  font-weight: 700;
}

.uf-header__title {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.uf-header__title-main {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.uf-header__title-sub {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--color-text-muted);
}

/* Navigation */

.uf-header__nav {
  display: flex;
  align-items: center;
}

.uf-header__nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.uf-header__nav-link {
  position: relative;
  font-size: var(--font-size-sm);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  padding-block: 0.2rem;
}

.uf-header__nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -0.25rem;
  width: 0;
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-danger));
  transition: width var(--transition-base) ease;
}

.uf-header__nav-link:hover,
.uf-header__nav-link:focus-visible {
  color: var(--color-gray-50);
}

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

.uf-header__nav-item--cta .uf-header__nav-link--cta {
  padding-inline: 0.9rem;
  padding-block: 0.4rem;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(124, 92, 255, 0.7);
  background: radial-gradient(circle at top left, rgba(255, 255, 255, 0.1), transparent 50%),
    rgba(124, 92, 255, 0.2);
  box-shadow: 0 0 18px rgba(124, 92, 255, 0.6);
}

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

.uf-header__nav-item--cta .uf-header__nav-link--cta:hover,
.uf-header__nav-item--cta .uf-header__nav-link--cta:focus-visible {
  background: radial-gradient(circle at top left, rgba(255, 255, 255, 0.16), transparent 50%),
    rgba(159, 123, 255, 0.35);
}

/* Mobile toggle */

.uf-header__toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--color-border-subtle);
  background: rgba(5, 7, 22, 0.9);
  color: var(--color-gray-50);
}

.uf-header__toggle-box {
  position: relative;
  width: 20px;
  height: 16px;
}

.uf-header__toggle-line {
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  border-radius: 999px;
  background: var(--color-gray-100);
  transition: transform var(--transition-base) ease, opacity var(--transition-base) ease,
    top var(--transition-base) ease, bottom var(--transition-base) ease;
}

.uf-header__toggle-line--top {
  top: 0;
}

.uf-header__toggle-line--middle {
  top: 7px;
}

.uf-header__toggle-line--bottom {
  bottom: 0;
}

/* Backdrop for mobile menu */

.uf-header__backdrop {
  display: none;
}

/* States when nav is open (JS adds body.uf-header--nav-open) */

body.uf-header--nav-open .uf-header__toggle-line--top {
  top: 7px;
  transform: rotate(45deg);
}

body.uf-header--nav-open .uf-header__toggle-line--middle {
  opacity: 0;
}

body.uf-header--nav-open .uf-header__toggle-line--bottom {
  bottom: 7px;
  transform: rotate(-45deg);
}

body.uf-header--nav-open .uf-header__backdrop {
  display: block;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.72);
  z-index: 40;
}

/* Responsive layout */

@media (max-width: 768px) {
  .uf-header__inner {
    padding-block: var(--space-3);
  }

  .uf-header__toggle {
    display: inline-flex;
    z-index: 1000;
  }

  .uf-header__nav {
    position: fixed;
    top: 0;
    right: -1000%;
    width: 100%;
    background: radial-gradient(circle at top left, rgba(124, 92, 255, 0.18), transparent 60%),
      rgba(5, 7, 22, 0.98);
    border-left: 1px solid var(--color-border-subtle);
    box-shadow: var(--shadow-strong);
  
    transition: transform var(--transition-base) ease;
    z-index: 45;
  }

  .uf-header__nav-list {
    flex-direction: column;
    align-items: flex-start;
    padding: var(--space-6) var(--space-5);
    gap: var(--space-3);
  }

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

  body.uf-header--nav-open .uf-header__nav {
    right: 0;
  }
}

@media (max-width: 480px) {
  .uf-header__title-main {
    font-size: 1rem;
  }

  .uf-header__title-sub {
    display: none;
  }
}

@media (min-width: 769px) {
  .uf-header__nav {
    position: static;
    transform: none !important;
    background: transparent;
    border: none;
    box-shadow: none;
  }

  .uf-header__nav-list {
    padding: 0;
  }
}