/* Header styles scoped to .gs-header */

.gs-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: radial-gradient(circle at top left, rgba(184, 138, 42, 0.12), transparent 55%),
              rgba(5, 6, 8, 0.96);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--color-border-subtle);
}

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

/* Brand / logo */

.gs-header__brand {
  display: flex;
  align-items: center;
  min-width: 0;
}

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

.gs-header__logo-mark {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: radial-gradient(circle at 30% 20%, var(--color-primary-strong), var(--color-accent-burgundy));
  box-shadow: var(--shadow-sm);
  display: flex;
  align-items: center;
  justify-content: center;
}

.gs-header__logo-initials {
  font-family: var(--font-serif);
  font-size: 0.9rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: #050608;
}

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

.gs-header__site-name {
  font-family: var(--font-serif);
  font-size: var(--font-size-lg);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.gs-header__tagline {
  font-size: var(--font-size-xs);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--gray-400);
}

/* Navigation */

.gs-header__nav {
  display: flex;
}

.gs-header__nav-list {
  width: 100%;
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.gs-header__nav-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  padding-block: 0.25rem;
  font-size: var(--font-size-sm);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--gray-100);
}

.gs-header__nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent-burgundy));
  transform-origin: left;
  transform: scaleX(0);
  transition: transform var(--transition-normal);
}

.gs-header__nav-link:focus-visible::after,
.gs-header__nav-link:hover::after {
  transform: scaleX(1);
}

.gs-header__nav-item--accent .gs-header__nav-link {
  padding-inline: 1.25rem;
  padding-block: 0.5rem;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(184, 138, 42, 0.7);
  background: radial-gradient(circle at top left, rgba(184, 138, 42, 0.2), transparent 55%);
  box-shadow: 0 10px 32px rgba(0, 0, 0, 0.5);
}

.gs-header__nav-item--accent .gs-header__nav-link::after {
  display: none;
}

.gs-header__nav-link--cta {
  color: var(--gray-50);
}

.gs-header__nav-item--accent .gs-header__nav-link:hover {
  background: radial-gradient(circle at top left, rgba(184, 138, 42, 0.25), transparent 65%);
}

/* Mobile toggle */

.gs-header__toggle {
  display: none;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(184, 138, 42, 0.4);
  background: rgba(5, 6, 8, 0.9);
  color: var(--gray-100);
  cursor: pointer;
}

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

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

.gs-header__toggle-bar {
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  border-radius: 1px;
  background: var(--gray-100);
  transition: transform var(--transition-normal), opacity var(--transition-fast), top var(--transition-normal), bottom var(--transition-normal);
}

.gs-header__toggle-bar--top {
  top: 0;
}

.gs-header__toggle-bar--middle {
  top: 7px;
}

.gs-header__toggle-bar--bottom {
  bottom: 0;
}

.gs-header__toggle-text {
  font-size: var(--font-size-xs);
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

/* Toggle active state */

.gs-header--menu-open .gs-header__toggle-bar--top {
  top: 7px;
  transform: rotate(45deg);
}

.gs-header--menu-open .gs-header__toggle-bar--middle {
  opacity: 0;
}

.gs-header--menu-open .gs-header__toggle-bar--bottom {
  bottom: 7px;
  transform: rotate(-45deg);
}

/* Mobile layout */

@media (max-width: 900px) {
  .gs-header__inner {
    padding-top: var(--space-3);
    padding-bottom: var(--space-3);
  }

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

  .gs-header__nav {
    position: fixed;
    inset-inline: 0;
    top: 60px;
    transform: translateY(-8px);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity var(--transition-normal), transform var(--transition-normal), visibility var(--transition-normal);
  }

  .gs-header--menu-open .gs-header__nav {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translateY(0);
  }

  .gs-header__nav-list {
    flex-direction: column;
    align-items: flex-start;
    margin: 0 var(--space-4) var(--space-4);
    padding: var(--space-4);
    border-radius: var(--radius-lg);
    background: radial-gradient(circle at top left, rgba(184, 138, 42, 0.16), transparent 60%),
                var(--color-surface-elevated);
    box-shadow: var(--shadow-md);
  }

  .gs-header__nav-link {
    font-size: var(--font-size-md);
  }

  .gs-header__nav-item--accent {
    width: 100%;
  }

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

@media (max-width: 520px) {
  .gs-header__tagline {
    display: none;
  }
}

/* Reduced motion */

@media (prefers-reduced-motion: reduce) {
  .gs-header__nav,
  .gs-header__toggle-bar {
    transition: none;
  }
}