.topbar {
  display: flex;
  align-items: center;
  height: var(--header-height);
  background: var(--bg-void);
  border-bottom: 1px solid var(--border-hairline);
  -webkit-app-region: drag;
  padding-inline: var(--space-3);
  gap: var(--space-3);
  box-sizing: border-box
}

.logo-slot {
  display: flex;
  height: 85%;
  aspect-ratio: 1 / 1;

  padding: 0;
  border: none;
  background: transparent;

  overflow: hidden;
  cursor: pointer;

  -webkit-app-region: no-drag;

  border-radius: var(--radius-pill);
}

.tabstrip {
  display: flex;
  height: var(--header-height);
  flex: 1 1 auto;
  overflow-x: auto;
  overflow-y: hidden;
  min-width: 0;
  -webkit-app-region: no-drag;
  border-left: 1px solid var(--border-hairline);


  scrollbar-width: thin;
  scrollbar-color: var(--border-hairline) transparent;
  scroll-behavior: smooth;
  scroll-padding-inline: var(--space-3);
  scroll-snap-type: x proximity;
  align-items: center;
  gap: var(--space-4);
  padding-left: var(--space-4);

  container-type: inline-size;
  container-name: tabstrip;

  -webkit-mask-image: linear-gradient(to right, transparent, black 0);
  mask-image: linear-gradient(to right, transparent, black 0);
}

.tabstrip-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  height: var(--header-height);
  flex: 0 0 auto;
  gap: var(--space-3);
}

.tab-action {
  display: flex;
  align-items: center;
  justify-content: center;

  cursor: pointer;
  padding: 0;

  background: transparent;
  border: var(--border-width-active) solid transparent;
}

.tab-action:hover {
  background: var(--bg-raised);
  border-color: var(--accent-brand);
  color: var(--text-primary);
}

.tab-add {
  height: 70%;
  border-radius: 50%;
  color: var(--text-muted);
  aspect-ratio: 1;
}

.crown-action {
  height: 70%;
  aspect-ratio: 1;
  border-radius: 50%;
  color: #facc15;
  width: auto;
}

.crown-action:hover {
  color: #fde047;
}

.icon-crown,
.icon-tab-add,
.icon-tab-add-empty {
  aspect-ratio: 1/1;
  height: 80%;
}

.tab-add-empty {
  height: 70%;
  border-radius: var(--radius-pill);
  border: var(--border-width-active) dashed var(--border-hairline);
  color: var(--text-muted);

  font-family: var(--font-ui);
  font-weight: 500;

  flex-shrink: 0;

  gap: var(--space-2);
  padding-inline: var(--space-2);
}

.tab-add-empty:hover {
  border-color: var(--accent-brand);
  border-style: solid;
}

/* Tab */
.tab {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  height: var(--tab-height);
  padding: 0 var(--space-3);
  border: var(--border-width-active) solid transparent;
  border-radius: var(--radius-lg);
  background: transparent;
  color: var(--text-muted);
  font-family: var(--font-ui);
  cursor: pointer;
  box-sizing: border-box;
  scroll-snap-align: start;

  flex: 0 0 25%;
  max-width: 25%;
  min-width: calc(
    (var(--space-3) * 2) + (var(--tab-height) * 0.5) + (var(--space-2) * 2) + 4ch +
      var(--tab-close-size)
  );
}

.tab:hover {
  background: var(--bg-raised);
  color: var(--text-primary);
  border-color: var(--accent-brand);
}

.tab span[title] {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  min-width: 0;
}

.tab-led {
  height: 40%;
  aspect-ratio: 1 / 1;

  flex: 0 0 auto;

  display: flex;
  align-items: center;
  justify-content: center;

  min-height: 0;
  min-width: 0;
}

.tab-close {
  height: 50%;
  aspect-ratio: 1 / 1;

  display: flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 auto;
  margin-left: auto;
  padding: 0;
  font-size: var(--tab-close-font);
  line-height: 1;
  color: var(--text-muted);
  border-radius: var(--radius-sm);
}

.tab--active {
  background: var(--bg-panel);
  border-color: var(--accent-brand);
  color: var(--text-primary);
}

.tab--dimmed {
  opacity: 0.55;
}

.tab-close:hover {
  background: var(--bg-panel);
  color: var(--text-primary);
}

.tabstrip[data-fade-start='true'] {
  -webkit-mask-image: linear-gradient(
    to right,
    transparent,
    black 24px,
    black calc(100% - 24px),
    black
  );
  mask-image: linear-gradient(to right, transparent, black 24px, black calc(100% - 24px), black);
}
.tabstrip[data-fade-end='true'] {
  -webkit-mask-image: linear-gradient(to right, black, black calc(100% - 24px), transparent);
  mask-image: linear-gradient(to right, black, black calc(100% - 24px), transparent);
}
.tabstrip[data-fade-start='true'][data-fade-end='true'] {
  -webkit-mask-image: linear-gradient(
    to right,
    transparent,
    black 24px,
    black calc(100% - 24px),
    transparent
  );
  mask-image: linear-gradient(
    to right,
    transparent,
    black 24px,
    black calc(100% - 24px),
    transparent
  );
}

.tab[data-step='6'],
.tab[data-step='8'],
.tab[data-step='10'] {
  min-width: calc(
    (var(--space-3) * 2) + (var(--tab-height) * 0.5) + (var(--space-2) * 2) + 4ch +
      var(--tab-close-size)
  );
}