.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: var(--color-bg-base);
  border-bottom: 1px solid var(--color-gold-border);
  box-shadow: var(--shadow-standard);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  min-height: 72px;
  padding-block: var(--space-2);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  color: var(--color-text-primary);
  flex-shrink: 0;
}

.brand-mark {
  width: 48px;
  height: 48px;
  object-fit: contain;
  display: block;
}

.brand-text {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--color-text-primary);
  white-space: nowrap;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  background: transparent;
  border: 1px solid var(--color-gold-border);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: border-color var(--transition-fast), background-color var(--transition-fast);
}

.nav-toggle:hover {
  border-color: var(--color-gold-primary);
  background-color: rgba(222, 130, 64, 0.08);
}

.nav-toggle:focus-visible {
  outline: 2px solid var(--color-focus-ring);
  outline-offset: 2px;
}

.nav-toggle-line {
  display: block;
  width: 22px;
  height: 2px;
  background-color: var(--color-gold-primary);
  border-radius: 1px;
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

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

.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.nav-overlay,
.site-nav-header,
.nav-close {
  display: none;
}

.site-nav {
  display: flex;
  align-items: center;
  flex-shrink: 1;
  min-width: 0;
}

.site-nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-nav-list li {
  margin: 0;
  padding: 0;
}

.site-nav-list a {
  display: inline-flex;
  align-items: center;
  font-family: var(--font-body);
  font-size: 0.9375rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--color-text-primary);
  text-decoration: none;
  white-space: nowrap;
  padding: var(--space-2) 0;
  position: relative;
  transition: color var(--transition-fast);
}

.site-nav-list a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 2px;
  background-color: var(--color-gold-primary);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-fast);
}

.site-nav-list a:hover {
  color: var(--color-gold-primary);
}

.site-nav-list a:hover::after {
  transform: scaleX(1);
}

.site-nav-list a:focus-visible {
  outline: 2px solid var(--color-focus-ring);
  outline-offset: 2px;
}

@media (max-width: 1023px) {
  .header-inner {
    min-height: 64px;
  }

  .brand-mark {
    width: 36px;
    height: 36px;
  }

  .brand-text {
    font-size: 1rem;
  }

  .nav-toggle {
    display: flex;
  }

  .site-nav {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    width: min(320px, 85vw);
    max-width: 100%;
    background-color: var(--color-bg-surface);
    border-left: 1px solid var(--color-gold-border);
    box-shadow: var(--shadow-modal);
    transform: translateX(100%);
    transition: transform var(--transition-medium);
    z-index: 1001;
    padding: var(--space-6);
    overflow-y: auto;
    display: block;
  }

  .site-nav.is-open {
    transform: translateX(0);
  }

  .nav-overlay {
    display: block;
    position: fixed;
    inset: 0;
    background-color: rgba(0, 0, 0, 0.65);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-medium), visibility var(--transition-medium);
  }

  .nav-overlay.is-visible {
    opacity: 1;
    visibility: visible;
  }

  .site-nav-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-block-end: var(--space-5);
    padding-block-end: var(--space-3);
    border-bottom: 1px solid var(--color-gold-border);
  }

  .site-nav-title {
    font-family: var(--font-heading);
    font-size: 1.125rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--color-gold-primary);
  }

  .nav-close {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: transparent;
    border: 1px solid var(--color-gold-border);
    border-radius: var(--radius-md);
    color: var(--color-gold-primary);
    cursor: pointer;
    transition: all var(--transition-fast);
  }

  .nav-close:hover {
    background-color: rgba(222, 130, 64, 0.12);
    border-color: var(--color-gold-primary);
    color: var(--color-text-primary);
  }

  .nav-close:focus-visible {
    outline: 2px solid var(--color-focus-ring);
    outline-offset: 2px;
  }

  .site-nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: var(--space-2);
  }

  .site-nav-list a {
    display: block;
    padding: var(--space-3) var(--space-4);
    border-radius: var(--radius-md);
    font-size: 1rem;
  }

  .site-nav-list a::after {
    display: none;
  }

  .site-nav-list a:hover {
    background-color: rgba(222, 130, 64, 0.08);
    color: var(--color-gold-primary);
  }
}

@media (max-width: 480px) {
  .brand-text {
    display: none;
  }
}