/* Header styles for MobileTechPL */

.mt-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(18px);
  background: linear-gradient(to bottom, rgba(5, 6, 8, 0.96), rgba(5, 6, 8, 0.88));
  border-bottom: 1px solid var(--color-border-subtle);
}

.mt-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-16);
  padding-bottom: var(--space-16);
  gap: var(--space-16);
}

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

.mt-header__logo-link {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-family: "Space Grotesk", var(--font-sans);
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--gray-50);
}

.mt-header__logo-mark {
  width: 32px;
  height: 32px;
  border-radius: 40%;
  background: radial-gradient(circle at 20% 0%, rgba(47, 107, 255, 0.9), transparent 55%),
              radial-gradient(circle at 80% 100%, rgba(148, 163, 184, 0.9), transparent 55%),
              var(--color-surface-alt);
  box-shadow: 0 0 0 1px rgba(148, 163, 184, 0.25), var(--shadow-sm);
}

.mt-header__logo-text {
  font-size: var(--font-size-sm);
  white-space: nowrap;
}

/* Nav */
.mt-header__nav {
  display: flex;
}

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

.mt-header__nav-link {
  position: relative;
  font-size: var(--font-size-sm);
  font-weight: 500;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  transition: color var(--transition-fast), opacity var(--transition-fast);
}

.mt-header__nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -0.35rem;
  width: 0;
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--color-primary), var(--gray-300));
  transition: width var(--transition-base);
}

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

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

.mt-header__nav-link--cta {
  padding: 0.4rem 0.9rem;
  border-radius: var(--radius-full);
  border: 1px solid rgba(47, 107, 255, 0.45);
  background: radial-gradient(circle at 0 0, rgba(47, 107, 255, 0.3), transparent 55%),
              rgba(15, 17, 21, 0.95);
  color: var(--gray-50);
  box-shadow: 0 0 0 1px rgba(47, 107, 255, 0.2);
}

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

.mt-header__nav-link--cta:hover,
.mt-header__nav-link--cta:focus-visible {
  border-color: var(--color-primary);
  background: radial-gradient(circle at 0 0, rgba(47, 107, 255, 0.45), transparent 60%),
              rgba(10, 12, 16, 0.98);
}

/* Mobile toggle */
.mt-header__toggle {
  display: none;
  position: relative;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  border: 1px solid var(--color-border-subtle);
  justify-content: center;
  align-items: center;
  flex-direction: column;
  gap: 5px;
  color: var(--gray-50);
  background: rgba(8, 10, 14, 0.92);
}

.mt-header__toggle-bar {
  width: 18px;
  height: 2px;
  border-radius: 999px;
  background-color: var(--gray-100);
  transition: transform var(--transition-base), opacity var(--transition-fast);
}

.mt-header__toggle:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
}

/* Toggle active state */
.mt-header__toggle--active .mt-header__toggle-bar:nth-child(1) {
  transform: translateY(4px) rotate(45deg);
}

.mt-header__toggle--active .mt-header__toggle-bar:nth-child(2) {
  opacity: 0;
}

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

/* Mobile nav behavior */
@media (max-width: 768px) {
  .mt-header__inner {
    padding-top: 0.75rem;
    padding-bottom: 0.75rem;
  }

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

  .mt-header__nav {
    position: absolute;
    inset-inline: 0;
    top: 100%;
    background: radial-gradient(circle at 0 0, rgba(47, 107, 255, 0.18), transparent 55%),
                rgba(5, 6, 8, 0.98);
    border-bottom: 1px solid var(--color-border-subtle);
    transform-origin: top;
    transform: scaleY(0.9);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-base), transform var(--transition-base), visibility var(--transition-fast);
  }

  .mt-header__nav-list {
    flex-direction: column;
    align-items: flex-start;
    padding: 0.75rem 1rem 1rem;
    gap: 0.75rem;
  }

  .mt-header__nav-link,
  .mt-header__nav-link--cta {
    width: 100%;
  }

  .mt-header__nav-link--cta {
    text-align: center;
  }

  .mt-header__nav--open {
    opacity: 1;
    visibility: visible;
    transform: scaleY(1);
  }
}

/* Medium screens */
@media (min-width: 769px) and (max-width: 1024px) {
  .mt-header__nav-list {
    gap: 1.25rem;
  }
}

/* Fallback when JS disabled - ensure nav is visible */
.no-js .mt-header__nav {
  opacity: 1 !important;
  visibility: visible !important;
  transform: none !important;
  position: static !important;
  background: transparent !important;
  border-bottom: none !important;
}

.no-js .mt-header__toggle {
  display: none !important;
}