.ace-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background-color: var(--ace-ink);
  color: var(--ace-stone);
  border-bottom: 1px solid var(--ace-border-dark);
  height: var(--ace-header-height-desktop);
}

.ace-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--ace-space-lg);
  height: 100%;
  max-width: var(--ace-container-max);
  margin-inline: auto;
  padding-inline: var(--ace-container-pad-mobile);
}

.ace-header__brand {
  display: inline-flex;
  align-items: center;
  gap: var(--ace-space-sm);
  text-decoration: none;
  color: var(--ace-stone);
  flex-shrink: 0;
  min-width: 0;
}

.ace-header__logo {
  width: 44px;
  height: 44px;
  object-fit: contain;
  flex-shrink: 0;
}

.ace-header__brand-text {
  font-size: 1.125rem;
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.01em;
  white-space: nowrap;
}

.ace-header__nav {
  display: flex;
  align-items: center;
  flex: 1 1 auto;
  justify-content: center;
  min-width: 0;
}

.ace-header__nav-list {
  display: flex;
  align-items: center;
  gap: var(--ace-space-sm);
  list-style: none;
  margin: 0;
  padding: 0;
}

.ace-header__nav-item {
  margin: 0;
  padding: 0;
}

.ace-header__nav-link {
  display: inline-block;
  padding: var(--ace-space-xs) var(--ace-space-sm);
  color: var(--ace-stone);
  text-decoration: none;
  font-size: 0.9375rem;
  font-weight: 500;
  line-height: 1.4;
  white-space: nowrap;
  transition: color var(--ace-transition-fast);
}

.ace-header__nav-link:hover {
  color: var(--ace-brass);
}

.ace-header__nav-link[aria-current="page"] {
  color: var(--ace-brass);
  text-decoration: underline;
  text-underline-offset: 4px;
  text-decoration-thickness: 2px;
}

.ace-header__actions {
  display: flex;
  align-items: center;
  gap: var(--ace-space-sm);
  flex-shrink: 0;
}

.ace-header__action-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: var(--ace-space-xs) var(--ace-space-md);
  border: 1px solid var(--ace-border-dark);
  border-radius: var(--ace-radius-control);
  color: var(--ace-stone);
  text-decoration: none;
  font-size: 0.9375rem;
  font-weight: 600;
  line-height: 1.2;
  white-space: nowrap;
  transition: background-color var(--ace-transition-fast), color var(--ace-transition-fast), border-color var(--ace-transition-fast);
}

.ace-header__action-link:hover {
  background-color: var(--ace-stone);
  color: var(--ace-ink);
  border-color: var(--ace-stone);
}

.ace-header__toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 0;
  background: none;
  border: none;
  cursor: pointer;
  flex-shrink: 0;
}

.ace-header__toggle-line {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--ace-stone);
  transition: transform var(--ace-transition-medium), opacity var(--ace-transition-fast);
  transform-origin: center;
}

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

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

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

.ace-header__toggle:focus-visible {
  outline: var(--ace-focus-ring);
  outline-offset: var(--ace-focus-offset);
}

@media (max-width: 1023px) {
  .ace-header {
    height: var(--ace-header-height-mobile);
  }

  .ace-header__inner {
    gap: var(--ace-space-md);
  }

  .ace-header__logo {
    width: 36px;
    height: 36px;
  }

  .ace-header__brand-text {
    font-size: 1rem;
  }

  .ace-header__nav {
    position: fixed;
    top: var(--ace-header-height-mobile);
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--ace-ink);
    flex-direction: column;
    justify-content: flex-start;
    align-items: stretch;
    padding: var(--ace-space-xl) var(--ace-container-pad-mobile);
    overflow-y: auto;
    transform: translateX(100%);
    transition: transform var(--ace-transition-medium);
    z-index: 999;
    display: flex;
  }

  .ace-header__nav.is-open {
    transform: translateX(0);
  }

  .ace-header__nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: var(--ace-space-xs);
    width: 100%;
  }

  .ace-header__nav-item {
    width: 100%;
  }

  .ace-header__nav-link {
    display: block;
    width: 100%;
    padding: var(--ace-space-md) var(--ace-space-sm);
    font-size: 1.25rem;
    font-weight: 600;
    line-height: 1.3;
    border-bottom: 1px solid var(--ace-border-dark);
  }

  .ace-header__nav-link:hover {
    background-color: rgba(243, 238, 229, 0.05);
  }

  .ace-header__actions {
    display: none;
  }

  .ace-header__toggle {
    display: flex;
  }
}

@media (min-width: 1024px) {
  .ace-header__inner {
    padding-inline: var(--ace-container-pad-desktop);
  }

  .ace-header__nav {
    position: static;
    transform: none;
    overflow: visible;
    padding: 0;
    background: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .ace-header__nav {
    transition: none;
  }
}