header {
  height: var(--header-height);
  background-color: var(--bg-color);
  border-bottom: 1px solid var(--border-color);
  padding: 0.25rem 1.5rem;
  z-index: 100;
}

header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem;
}

header .product-version-controls {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

header .product-version-controls .version-dropdown {
  margin-left: auto;
}

header .header-toolbar-spacer {
  min-width: 0;
}

.logo-container {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-left: 0.5rem;
}

.logo-container a:first-child {
  height: 32px;
  width: 32px;
  flex-shrink: 0;
}

.logo-container a:first-child img {
  height: 100%;
  width: 100%;
  object-fit: contain;
}

.logo-container .title {
  color: unset;
  font-weight: 400;
  font-size: 1.25rem;
  white-space: nowrap;
  min-width: 10em; /* prevent layout shift between "Union.ai Docs" and "Flyte OSS Docs" */
}

#theme-toggle {
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.25rem 0.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-color);
  border-radius: 0.375rem;
  transition: background-color 0.2s;
}

#theme-toggle:hover {
  background-color: var(--code-bg);
}

#sun-icon {
  display: block;
}

#moon-icon {
  display: none;
}

[data-theme="dark"] #moon-icon {
  display: block;
}

[data-theme="dark"] #sun-icon {
  display: none;
}

/* ── Product toggle ── */
.product-toggle {
  display: flex;
  background: var(--code-bg);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 4px;
  gap: 2px;
  position: relative;
  height: 34px;
  box-sizing: border-box;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.product-toggle:hover {
  border-color: var(--separator);
  box-shadow: 0 1px 0 0 rgba(31, 35, 40, 0.04), 0 2px 4px rgba(0, 0, 0, 0.07);
}

.product-toggle button {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 3px 18px;
  border: none;
  border-radius: 6px;
  background: transparent;
  font-family: inherit;
  font-size: 0.84rem;
  font-weight: 500;
  color: var(--text-color-light);
  cursor: pointer;
  transition: color 0.2s, background 0.25s;
  white-space: nowrap;
}

.product-toggle button.active {
  background: #cbd5e1;
  color: var(--text-color);
  font-weight: 500;
  box-shadow: 0 1px 0 0 rgba(31, 35, 40, 0.04), 0 1px 3px rgba(0, 0, 0, 0.08);
}

.product-toggle button:not(.active):hover {
  color: var(--text-color);
  background: var(--code-bg);
}

.product-toggle button:disabled {
  cursor: default;
  opacity: 0.7;
}

/* Colored dots — hardcoded since --union-color changes per variant build */
.product-toggle .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
  transition: opacity 0.2s;
}

.product-toggle button:not(.active) .dot {
  opacity: 0.35;
}

.product-toggle .dot.union { background: #e6a720; }
.product-toggle .dot.flyte { background: #6f2aef; }

/* ── Version dropdown ── */
.version-dropdown {
  position: relative;
}

.version-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 0 14px;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  font-family: inherit;
  font-size: 0.84rem;
  font-weight: 500;
  cursor: pointer;
  background: var(--code-bg);
  color: var(--text-color);
  box-shadow: 0 1px 0 0 rgba(31, 35, 40, 0.04);
  transition: border-color 0.2s, box-shadow 0.2s;
  white-space: nowrap;
  height: 34px;
  box-sizing: border-box;
}

.version-btn:hover {
  border-color: var(--separator);
  box-shadow: 0 1px 0 0 rgba(31, 35, 40, 0.04), 0 2px 4px rgba(0, 0, 0, 0.07);
}

.version-btn:disabled {
  cursor: default;
  opacity: 0.7;
}

.version-btn .badge {
  background: #dcfce7;
  color: #15803d;
  font-size: 0.625rem;
  font-weight: 700;
  padding: 2px 6px;
  border-radius: 5px;
  letter-spacing: 0.04em;
}

.version-btn .chevron-icon {
  margin-left: 2px;
  transition: transform 0.2s;
}

.version-dropdown.open .version-btn .chevron-icon {
  transform: rotate(180deg);
}

.version-dropdown.open .version-btn {
  border-color: var(--border-color);
}

.version-menu {
  position: absolute;
  top: calc(100% + 6px);
  right: 0;
  width: max-content;
  background-color: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12), 0 2px 6px rgba(0, 0, 0, 0.06);
  padding: 6px;
  display: none;
  z-index: 200;
  opacity: 1;
}

.version-dropdown.open .version-menu {
  display: block;
}

.version-item {
  width: 100%;
  text-align: left;
  padding: 9px 14px;
  border: none;
  border-radius: 6px;
  font-family: inherit;
  font-size: 0.84rem;
  font-weight: 500;
  cursor: pointer;
  background: transparent;
  color: var(--text-color-light);
  display: flex;
  align-items: center;
  gap: 8px;
  transition: background 0.15s;
}

.version-item:hover {
  background: var(--code-bg);
  color: var(--text-color);
}

.version-item.selected {
  background: var(--code-bg);
  color: var(--text-color);
  font-weight: 500;
}

.version-item .badge {
  background: #dcfce7;
  color: #15803d;
  font-size: 0.625rem;
  font-weight: 700;
  padding: 2px 6px;
  border-radius: 5px;
}

.version-item .check-icon {
  opacity: 0;
}

.badge-hidden {
  visibility: hidden;
}

.version-item.selected .check-icon {
  opacity: 1;
}

/* ── Dark theme overrides ── */
/* In dark mode, --code-bg (#2d3748) is the track, #141d33 is the active segment */
[data-theme="dark"] .product-toggle button.active {
  background: #141d33;
  box-shadow: 0 1px 0 0 rgba(0, 0, 0, 0.2), 0 1px 3px rgba(0, 0, 0, 0.3);
}

[data-theme="dark"] .version-btn .badge,
[data-theme="dark"] .version-item .badge {
  background: #064e3b;
  color: #6ee7b7;
}

[data-theme="dark"] .version-menu {
  background-color: #141d33;
  box-shadow: 0 8px 28px rgba(0, 0, 0, 0.4);
}

[data-theme="dark"] .version-item:hover {
  background: var(--code-bg);
}

[data-theme="dark"] .version-item.selected {
  background: color-mix(in srgb, var(--primary-color) 15%, transparent);
}

/* ── Dev mode warnings ── */
#devwarn, #verwarn {
  display: none;
  position: absolute;
  top: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%);
  background: yellow;
  color: gray;
  padding: 4px 8px;
  border-radius: 4px;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  white-space: nowrap;
  z-index: 201;
  font-size: 0.75rem;
}

header .toggle-sidebar {
  display: none;
}

/* Product + version controls live in the mobile drawer below 1200px (see sidebar.html) */
.drawer-sidebar::part(header) {
  padding-bottom: 0;
}

.drawer-sidebar::part(body) {
  padding-top: 0.25rem;
}

.drawer-sidebar .drawer-product-version-host {
  width: 100%;
}

.drawer-sidebar .product-version-controls {
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: 0.75rem;
  padding: 0 0.5rem 0.5rem;
  margin-bottom: 0.25rem;
}

.drawer-sidebar .product-toggle {
  flex: 1;
  justify-content: center;
}

.drawer-sidebar .product-toggle button {
  padding: 5px 14px;
  font-size: 0.8rem;
}

.drawer-sidebar .version-menu {
  position: absolute;
  top: calc(100% + 4px);
  left: 0;
  width: max-content;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  z-index: 200;
}

.drawer-sidebar .product-version-controls .developer {
  position: static;
  margin: 0;
}

.signup-button {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  height: 34px;
  box-sizing: border-box;
  padding: 0 0.9rem;
  background-color: var(--union-color);
  color: #fff;
  border: 1px solid var(--union-color);
  border-radius: 6px;
  font-family: inherit;
  font-size: 0.84rem;
  font-weight: 500;
  text-decoration: none;
  white-space: nowrap;
  cursor: pointer;
  transition: background-color 0.2s, border-color 0.2s;
}

.signup-icon {
  display: none;
  flex-shrink: 0;
}

[data-theme="dark"] .signup-button {
  color: #fff;
}

.signup-button:hover {
  background-color: var(--union-color-dark);
  border-color: var(--union-color-dark);
  color: #fff;
}

.old-version {
  border: var(--old-version-border);
  background-color: var(--old-version-background);
  padding: 1rem 1.25rem;
  margin: 0 1.25rem 2rem 1.25rem;
}

.old-version .title {
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
}

.old-version .message {
  font-size: 0.9rem;
}