/* Header styles for Top Select Guide */

.tsg-header {
  position: sticky;
  top: 0;
  z-index: var(--z-header);
  backdrop-filter: blur(22px);
  background: radial-gradient(circle at top left, rgba(59, 177, 255, 0.22), transparent 55%),
              radial-gradient(circle at top right, rgba(196, 122, 61, 0.28), transparent 60%),
              rgba(5, 8, 20, 0.96);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

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

/* Brand */

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

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

.tsg-header__logo-mark {
  width: 38px;
  height: 38px;
  border-radius: 14px;
  background: conic-gradient(from 210deg, var(--color-accent-copper), var(--color-primary), #ffffff10, var(--color-accent-copper));
  padding: 2px;
  box-shadow: var(--shadow-glow-copper);
}

.tsg-header__logo-mark::before {
  content: "";
  display: block;
  width: 100%;
  height: 100%;
  border-radius: 12px;
  background: radial-gradient(circle at 30% 0, rgba(255, 255, 255, 0.16), transparent 55%),
              radial-gradient(circle at 70% 100%, rgba(0, 0, 0, 0.85), #050814);
}

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

.tsg-header__logo-title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.1rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.tsg-header__logo-subtitle {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--color-text-muted);
}

/* Navigation */

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

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

.tsg-header__nav-link {
  font-size: var(--font-size-sm);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--color-text-muted);
  position: relative;
  padding-block: 0.25rem;
}

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

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

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

.tsg-header__cta-wrapper {
  margin-left: var(--space-4);
}

.tsg-header__cta {
  white-space: nowrap;
}

/* Mobile toggle */

.tsg-header__toggle {
  display: none;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(255, 255, 255, 0.16);
  background: radial-gradient(circle at 30% 0, rgba(255, 255, 255, 0.04), transparent 55%),
              rgba(7, 10, 22, 0.95);
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 4px;
  cursor: pointer;
  color: var(--color-text);
  transition: background var(--transition-base), border-color var(--transition-base), transform var(--transition-fast);
}

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

.tsg-header__toggle:hover {
  border-color: var(--color-accent-copper);
  transform: translateY(-1px);
}

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

/* Open state */

.tsg-header__toggle--open .tsg-header__toggle-bar:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

.tsg-header__toggle--open .tsg-header__toggle-bar:nth-child(2) {
  opacity: 0;
}

.tsg-header__toggle--open .tsg-header__toggle-bar:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

/* Header offset to prevent content jump */

.tsg-header-offset {
  height: 0;
}

@media (min-width: 768px) {
  .tsg-header-offset {
    height: 72px; /* approximate header height */
  }
}

/* Responsive behavior */

@media (max-width: 767.98px) {
  .tsg-header__inner {
    padding-top: var(--space-2);
    padding-bottom: var(--space-2);
  }

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

  .tsg-header__nav {
    position: fixed;
    inset-inline: 0;
    top: 64px;
    background: radial-gradient(circle at top, rgba(59, 177, 255, 0.16), transparent 55%),
                rgba(5, 8, 20, 0.98);
    border-top: 1px solid rgba(255, 255, 255, 0.04);
    display: none;
    flex-direction: column;
    padding: var(--space-4) var(--container-padding-x) var(--space-6);
    gap: var(--space-4);
    box-shadow: var(--shadow-soft);
  }

  .tsg-header__nav--open {
    display: flex;
  }

  .tsg-header__nav-list {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-2);
  }

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

  .tsg-header__cta-wrapper {
    margin-left: 0;
  }

  .tsg-header__cta {
    width: 100%;
    justify-content: center;
  }
}

@media (max-width: 480px) {
  .tsg-header__logo-subtitle {
    display: none;
  }
}