/* TechPulseZone Header Styles */

.tpz-header {
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(18px);
  background:
    radial-gradient(circle at 0 0, rgba(47, 123, 255, 0.18), transparent 55%),
    radial-gradient(circle at 100% 0, rgba(56, 255, 217, 0.1), transparent 55%),
    rgba(5, 6, 10, 0.92);
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

.tpz-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 4.25rem;
  padding-top: var(--space-3);
  padding-bottom: var(--space-3);
}

/* Brand */
.tpz-header__brand {
  display: flex;
  align-items: center;
}

.tpz-header__logo {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  color: var(--color-text);
  font-weight: 650;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  font-size: 0.95rem;
}

.tpz-header__logo-mark {
  width: 1.9rem;
  height: 1.9rem;
  border-radius: 40% 60% 55% 45%;
  background:
    radial-gradient(circle at 30% 0, rgba(56, 255, 217, 0.9), transparent 55%),
    radial-gradient(circle at 80% 100%, rgba(47, 123, 255, 0.9), transparent 60%),
    #05060a;
  box-shadow: 0 0 0 1px rgba(56, 255, 217, 0.45), 0 0 22px rgba(47, 123, 255, 0.6);
  position: relative;
}

.tpz-header__logo-mark::after {
  content: "";
  position: absolute;
  inset: 30%;
  border-radius: inherit;
  border: 1px solid rgba(5, 6, 10, 0.9);
}

.tpz-header__logo-text {
  white-space: nowrap;
}

/* Navigation */
.tpz-header__nav {
  display: flex;
  align-items: center;
}

.tpz-header__nav-list {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.tpz-header__nav-item {
  position: relative;
}

.tpz-header__nav-link {
  display: inline-flex;
  align-items: center;
  padding: 0.45rem 0.85rem;
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  color: var(--color-text-soft);
  transition:
    color var(--transition-fast),
    background-color var(--transition-fast),
    box-shadow var(--transition-fast),
    transform var(--transition-fast);
}

.tpz-header__nav-link:hover,
.tpz-header__nav-link:focus-visible {
  color: var(--color-text);
  background: rgba(255, 255, 255, 0.04);
}

.tpz-header__nav-link--cta {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-strong));
  color: #ffffff;
  box-shadow: var(--shadow-sm);
}

.tpz-header__nav-link--cta:hover,
.tpz-header__nav-link--cta:focus-visible {
  background: linear-gradient(135deg, var(--color-primary-strong), #153b87);
  box-shadow: var(--shadow-md);
}

.tpz-header__nav-item--cta {
  margin-left: 0.35rem;
}

/* Mobile toggle */
.tpz-header__toggle {
  display: none;
  position: relative;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: var(--radius-full);
  border: 1px solid var(--color-border-subtle);
  background: rgba(15, 17, 23, 0.9);
  cursor: pointer;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 0.25rem;
  color: var(--color-text-soft);
  transition:
    background var(--transition-fast),
    border-color var(--transition-fast),
    box-shadow var(--transition-fast),
    transform var(--transition-fast);
}

.tpz-header__toggle-bar {
  width: 1.15rem;
  height: 2px;
  border-radius: 999px;
  background: var(--color-text-soft);
  transition:
    transform var(--transition-fast),
    opacity var(--transition-fast),
    background var(--transition-fast);
}

.tpz-header__toggle:hover,
.tpz-header__toggle:focus-visible {
  outline: none;
  border-color: var(--color-primary);
  background: rgba(20, 23, 33, 0.98);
  box-shadow: var(--shadow-sm);
}

.tpz-header__toggle[aria-expanded="true"] .tpz-header__toggle-bar:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

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

.tpz-header__toggle[aria-expanded="true"] .tpz-header__toggle-bar:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

/* Mobile layout */
@media (max-width: 768px) {
  .tpz-header__inner {
    min-height: 3.75rem;
  }

  .tpz-header__toggle {
    display: inline-flex;
  }

  .tpz-header__nav {
    position: fixed;
    inset: 3.75rem 0 auto 0;
    background: rgba(5, 6, 10, 0.98);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    transform: translateY(-120%);
    opacity: 0;
    visibility: hidden;
    transition:
      transform var(--transition-normal),
      opacity var(--transition-normal),
      visibility var(--transition-normal);
  }

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

  .tpz-header__nav-link {
    width: 100%;
    justify-content: flex-start;
    padding: 0.65rem 0.85rem;
  }

  .tpz-header__nav-item--cta {
    margin-left: 0;
    margin-top: 0.25rem;
  }

  .tpz-header__nav-link--cta {
    justify-content: center;
  }

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

  body.tpz-nav-open {
    overflow: hidden;
  }
}

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