/* Header styles for Chipmora */
.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(14px);
  background: linear-gradient(to bottom, rgba(5, 6, 7, 0.96), rgba(5, 6, 7, 0.88));
  border-bottom: 1px solid rgba(42, 48, 52, 0.9);
}

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

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

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

.site-header__logo-mark {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background:
    radial-gradient(circle at 30% 20%, rgba(246, 179, 97, 0.4), transparent 55%),
    radial-gradient(circle at 70% 80%, rgba(15, 59, 51, 0.6), transparent 55%),
    var(--color-bg-soft);
  border: 1px solid rgba(210, 166, 97, 0.7);
  box-shadow: var(--shadow-soft);
  position: relative;
}

.site-header__logo-mark::before {
  content: "C";
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 1.15rem;
  color: var(--color-text);
}

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

.site-header__logo-title {
  font-family: var(--font-display);
  font-size: 1.1rem;
  line-height: var(--line-height-tight);
}

.site-header__logo-subtitle {
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.site-header__nav {
  margin-left: auto;
}

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

.site-header__nav-link {
  position: relative;
  font-size: var(--font-size-sm);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  padding-block: 0.15rem;
}

.site-header__nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -0.2rem;
  width: 0;
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--color-accent-amber), var(--color-accent-gold));
  transition: width var(--transition-base);
}

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

.site-header__nav-link:hover::after,
.site-header__nav-link:focus-visible::after,
.site-header__nav-link[aria-current="page"]::after {
  width: 100%;
}

.site-header__nav-link[aria-current="page"] {
  color: var(--color-text);
}

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

.site-header__cta-button {
  font-size: 0.7rem;
}

/* Mobile toggle */
.site-header__toggle {
  display: none;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--color-border-subtle);
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  background: rgba(16, 19, 22, 0.95);
  color: var(--color-text);
}

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

.site-header__toggle--open .site-header__toggle-bar:first-child {
  transform: translateY(3.5px) rotate(45deg);
}

.site-header__toggle--open .site-header__toggle-bar:last-child {
  transform: translateY(-3.5px) rotate(-45deg);
}

/* Mobile layout */
@media (max-width: 900px) {
  .site-header__inner {
    padding-block: var(--space-3);
  }

  .site-header__nav {
    position: fixed;
    inset-inline: 0;
    top: 64px;
    background: radial-gradient(circle at top, rgba(0, 0, 0, 0.6), transparent 70%), var(--color-bg);
    border-top: 1px solid rgba(42, 48, 52, 0.9);
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    transform: translateY(-6px);
    transition: max-height var(--transition-slow), opacity var(--transition-base), transform var(--transition-base);
  }

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

  .site-header__nav--open {
    max-height: 320px;
    opacity: 1;
    transform: translateY(0);
  }

  .site-header__cta {
    display: none;
  }

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

/* Utility when menu is open to prevent scroll jump on some devices */
body.nav-open {
  overflow-y: hidden;
}