.sns-header {
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(20px);
  background: linear-gradient(90deg, rgba(5, 6, 10, 0.96), rgba(5, 11, 26, 0.96));
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.sns-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 */

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

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

.sns-header__logo-link::after {
  content: none;
}

.sns-header__logo-mark {
  position: relative;
  width: 40px;
  height: 40px;
}

.sns-header__chip {
  position: absolute;
  inset: 0;
  border-radius: 999px;
}

.sns-header__chip--outer {
  background: radial-gradient(circle at 30% 0%, #f3dd8b, #d4af37 55%, #5c1224 100%);
  box-shadow: var(--shadow-gold-glow);
}

.sns-header__chip--inner {
  inset: 7px;
  background: radial-gradient(circle at 50% 20%, #0c5c3c, #050b1a 80%);
  border: 1px solid rgba(246, 242, 233, 0.4);
}

.sns-header__text-group {
  display: flex;
  flex-direction: column;
}

.sns-header__title {
  font-family: var(--font-display);
  font-size: var(--font-size-lg);
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.sns-header__subtitle {
  font-size: var(--font-size-xs);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

/* Navigation */

.sns-header__nav {
  display: flex;
}

.sns-header__nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.sns-header__nav-link {
  position: relative;
  font-size: var(--font-size-sm);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--gray-100);
  padding-block: 0.2rem;
}

.sns-header__nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -0.35rem;
  width: 0;
  height: 1px;
  background: linear-gradient(90deg, var(--color-primary), rgba(243, 215, 124, 0.7));
  transition: width var(--transition-normal);
}

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

.sns-header__nav-link--cta {
  padding: 0.55rem 1.3rem;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(212, 175, 55, 0.7);
  background: radial-gradient(circle at 0 0, rgba(212, 175, 55, 0.24), rgba(5, 6, 10, 0.95));
  box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.7);
}

.sns-header__nav-link--cta::after {
  content: none;
}

.sns-header__nav-link--cta:hover,
.sns-header__nav-link--cta:focus-visible {
  background: radial-gradient(circle at 0 0, rgba(243, 215, 124, 0.32), rgba(5, 6, 10, 0.95));
  box-shadow: var(--shadow-gold-glow);
}

.sns-header__nav-item--cta {
  margin-left: var(--space-2);
}

/* Mobile toggle */

.sns-header__toggle {
  display: none;
  align-items: center;
  gap: var(--space-2);
  padding: 0.4rem 0.8rem;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(255, 255, 255, 0.16);
  color: var(--color-text);
}

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

.sns-header__toggle-box {
  width: 22px;
  height: 18px;
  position: relative;
}

.sns-header__toggle-line {
  position: absolute;
  left: 0;
  right: 0;
  height: 2px;
  border-radius: 999px;
  background: var(--color-text);
  transition: transform var(--transition-normal), opacity var(--transition-normal), top var(--transition-normal), bottom var(--transition-normal);
}

.sns-header__toggle-line--top {
  top: 0;
}

.sns-header__toggle-line--middle {
  top: 8px;
}

.sns-header__toggle-line--bottom {
  bottom: 0;
}

.sns-header__toggle-text {
  font-size: var(--font-size-xs);
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

/* Open state (controlled by JS via class on header) */

.sns-header--menu-open .sns-header__toggle-line--top {
  top: 8px;
  transform: rotate(45deg);
}

.sns-header--menu-open .sns-header__toggle-line--middle {
  opacity: 0;
}

.sns-header--menu-open .sns-header__toggle-line--bottom {
  bottom: 8px;
  transform: rotate(-45deg);
}

/* Responsive */

@media (max-width: 960px) {
  .sns-header__inner {
    padding-top: var(--space-3);
    padding-bottom: var(--space-3);
  }

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

  .sns-header__nav {
    position: fixed;
    inset: 64px 0 auto 0;
    max-height: calc(100vh - 64px);
    transform: translateY(-8px);
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-normal), transform var(--transition-normal);
  }

  .sns-header__nav-list {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-4);
    width: 100%;
    margin: 0 auto;
    padding: var(--space-6) var(--space-5) var(--space-8);
    background: radial-gradient(circle at 0 0, rgba(212, 175, 55, 0.08), rgba(5, 6, 10, 0.98));
    border-bottom: 1px solid rgba(255, 255, 255, 0.14);
    box-shadow: var(--shadow-strong);
  }

  .sns-header__nav-item--cta {
    margin-left: 0;
    width: 100%;
  }

  .sns-header__nav-link--cta {
    justify-content: center;
    width: 100%;
    text-align: center;
  }

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

@media (max-width: 640px) {
  .sns-header__title {
    font-size: var(--font-size-md);
  }

  .sns-header__subtitle {
    display: none;
  }
}