/* Header styles for CHIPS AWAY BRISTOL LTD */

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(18px);
  background: linear-gradient(180deg, rgba(5, 6, 8, 0.94), rgba(5, 6, 8, 0.85));
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

.site-header__topbar {
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  font-size: var(--font-size-xs);
  padding-block: 0.35rem;
  background: radial-gradient(circle at left, rgba(225, 17, 43, 0.4), transparent 55%);
}

.site-header__topbar-text {
  margin: 0;
  color: var(--color-neutral-100);
}

.site-header__topbar-contact {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.site-header__topbar-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--color-neutral-50);
  font-weight: 500;
  white-space: nowrap;
}

.site-header__topbar-link i {
  color: var(--color-primary);
  font-size: 0.8rem;
}

.site-header__divider {
  color: var(--color-neutral-500);
}

.site-header__main {
  padding-block: var(--space-3);
}

.site-header__brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
}

.site-header__logo-mark {
  width: 40px;
  height: 40px;
  border-radius: 999px;
  background:
    radial-gradient(circle at 30% 20%, rgba(255, 255, 255, 0.65), transparent 55%),
    conic-gradient(from 220deg, var(--color-primary) 0deg, #ff3648 100deg, #c0c5cf 260deg, #050608 320deg, var(--color-primary) 360deg);
  box-shadow: var(--shadow-soft);
  outline: 2px solid rgba(255, 255, 255, 0.1);
  outline-offset: 2px;
}

.site-header__brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.site-header__brand-title {
  font-family: var(--font-heading);
  font-size: var(--font-size-lg);
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.site-header__brand-title--ltd {
  color: var(--color-primary);
}

.site-header__brand-subtitle {
  font-size: var(--font-size-xs);
  text-transform: uppercase;
  letter-spacing: 0.24em;
  color: var(--color-text-muted);
}

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

.site-header__nav-list {
  display: flex;
  align-items: center;
  gap: 1.75rem;
  list-style: none;
}

.site-header__nav-item--cta {
  margin-left: 0.75rem;
}

.site-header__nav-link {
  position: relative;
  font-size: var(--font-size-sm);
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-neutral-100);
  padding-block: 0.25rem;
}

.site-header__nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -0.25rem;
  width: 100%;
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent-silver));
  transform: scaleX(0);
  transform-origin: center;
  opacity: 0;
  transition: transform var(--transition-base), opacity var(--transition-base);
}

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

.site-header__nav-link:focus-visible {
  outline: none;
  box-shadow: var(--shadow-focus);
  border-radius: var(--radius-pill);
  padding-inline: 0.5rem;
}

.site-header__nav-cta {
  font-size: var(--font-size-xs);
}

.site-header__menu-toggle {
  display: none;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 0.75rem;
  border-radius: var(--radius-pill);
  border: 1px solid var(--color-border-subtle);
  background-color: rgba(5, 6, 8, 0.9);
  color: var(--color-neutral-50);
  font-size: var(--font-size-xs);
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.site-header__menu-toggle-box {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
  width: 18px;
  height: 16px;
}

.site-header__menu-toggle-bar {
  height: 2px;
  width: 100%;
  border-radius: 999px;
  background-color: var(--color-neutral-100);
  transition: transform var(--transition-base), opacity var(--transition-base), background-color var(--transition-base);
}

.site-header__menu-toggle-text {
  text-transform: uppercase;
}

/* Mobile state for menu button when open */
.site-header__menu-toggle[aria-expanded="true"] .site-header__menu-toggle-bar:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

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

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

.site-header__menu-toggle[aria-expanded="true"] {
  border-color: var(--color-primary);
}

/* Responsive behavior */
@media (max-width: 960px) {
  .site-header__topbar {
    display: none;
  }

  .site-header__menu-toggle {
    display: inline-flex;
  }

  .site-header__nav {
    position: fixed;
    inset-inline: 0;
    top: 62px;
    background: rgba(5, 6, 8, 0.98);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    box-shadow: var(--shadow-strong);
    transform: translateY(-110%);
    opacity: 0;
    visibility: hidden;
    transition: transform var(--transition-slow), opacity var(--transition-slow), visibility var(--transition-slow);
  }

  .site-header__nav-list {
    flex-direction: column;
    align-items: flex-start;
    padding: var(--space-4);
    gap: 0.75rem;
  }

  .site-header__nav-item--cta {
    width: 100%;
    margin-left: 0;
    margin-top: 0.5rem;
  }

  .site-header__nav-cta {
    width: 100%;
    justify-content: center;
  }

  .site-header__nav-link {
    font-size: var(--font-size-sm);
  }

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

  body.site-header--nav-open {
    overflow: hidden;
  }
}

@media (max-width: 640px) {
  .site-header__brand-subtitle {
    display: none;
  }

  .site-header__brand-title {
    font-size: var(--font-size-base);
  }

  .site-header__logo-mark {
    width: 34px;
    height: 34px;
  }
}