.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--spt-header-strip-height);
  padding: var(--spt-safe-top) var(--spt-menu-padding-x) 0;
  background: var(--spt-color-bg);
  border-bottom: 1px solid var(--spt-color-border);
}

.site-header__brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  min-height: 0;
  min-width: 0;
}

.site-header__logo {
  height: calc(
    var(--spt-header-band-height) - 2 * var(--spt-header-logo-inset-y)
  );
  width: auto;
  max-height: calc(
    var(--spt-header-band-height) - 2 * var(--spt-header-logo-inset-y)
  );
  object-fit: contain;
  filter: drop-shadow(0 0 1px rgba(255, 255, 255, 0.08));
}

.site-header__menu-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0 0.35rem;
  border-radius: var(--spt-radius-sm);
  font-family: var(--spt-font-display);
  font-size: var(--spt-header-menu-font-size);
  font-weight: 600;
  letter-spacing: var(--spt-header-menu-letter-spacing);
  line-height: 1;
  text-transform: uppercase;
  color: var(--spt-color-accent);
  transition: color var(--spt-transition), background var(--spt-transition);
}

.site-header__menu-btn:hover,
.site-header__menu-btn:focus-visible {
  color: var(--spt-color-accent-hot);
  background: var(--spt-color-surface-elevated);
  outline: none;
}

.site-header__menu-btn[aria-expanded="true"] {
  color: var(--spt-color-accent-hot);
}

.site-header__burger {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 7px;
  width: 2rem;
  height: 2rem;
  flex-shrink: 0;
}

.site-header__burger span {
  display: block;
  height: 3px;
  width: 100%;
  background: currentColor;
  border-radius: 1px;
  transition: transform var(--spt-transition), opacity var(--spt-transition);
}

.site-header__menu-btn[aria-expanded="true"] .site-header__burger span:nth-child(1) {
  transform: translateY(10px) rotate(45deg);
}

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

.site-header__menu-btn[aria-expanded="true"] .site-header__burger span:nth-child(3) {
  transform: translateY(-10px) rotate(-45deg);
}

.menu-backdrop {
  position: fixed;
  inset: 0;
  top: var(--spt-header-strip-height);
  background: rgba(0, 0, 0, 0.55);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--spt-transition), visibility var(--spt-transition);
  z-index: 900;
}

.menu-backdrop.is-visible {
  opacity: 1;
  visibility: visible;
}

.menu-panel {
  position: fixed;
  left: 0;
  right: 0;
  top: var(--spt-header-strip-height);
  z-index: 950;
  max-height: calc(100dvh - var(--spt-header-strip-height) - var(--spt-safe-bottom));
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  background: var(--spt-color-surface);
  border-bottom: 1px solid var(--spt-color-border);
  box-shadow: var(--spt-shadow-menu);
  transform: translateY(-8px);
  opacity: 0;
  visibility: hidden;
  transition: transform var(--spt-transition), opacity var(--spt-transition),
    visibility var(--spt-transition);
}

.menu-panel.is-open {
  transform: translateY(0);
  opacity: 1;
  visibility: visible;
}

.menu-panel__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.menu-panel__link {
  display: flex;
  align-items: center;
  min-height: var(--spt-menu-row-height);
  padding: 0 var(--spt-menu-padding-x);
  border-bottom: 1px solid var(--spt-color-border);
  box-sizing: border-box;
  font-family: var(--spt-font-display);
  font-size: var(--spt-menu-font-size);
  font-weight: 600;
  letter-spacing: var(--spt-menu-letter-spacing);
  line-height: 1;
  text-transform: uppercase;
  color: var(--spt-color-text);
  transition: background var(--spt-transition), color var(--spt-transition);
}

.menu-panel__item:last-child .menu-panel__link {
  border-bottom: none;
}

.menu-panel__link:hover,
.menu-panel__link:focus-visible {
  background: var(--spt-color-surface-elevated);
  color: var(--spt-color-accent-hot);
  outline: none;
}

.menu-panel__link--auth {
  color: var(--spt-color-accent-hot);
}