.pwa-tab-host,
.pwa-tab-host body,
.pwa-tab-host #root {
  height: 100%;
  overflow: hidden;
}

.pwa-tabs-shell {
  display: flex;
  flex-direction: column;
  height: 100dvh;
  background: var(--page);
}

.pwa-tabs-toolbar {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: env(safe-area-inset-top) max(8px, env(safe-area-inset-right)) 0 max(8px, env(safe-area-inset-left));
  border-bottom: 1px solid var(--line);
  background: var(--surface);
}

.pwa-tabs-history {
  display: flex;
  flex: 0 0 auto;
  gap: 2px;
}

.pwa-tabs-list {
  display: flex;
  flex: 1;
  min-width: 0;
  overflow-x: auto;
  align-self: stretch;
}

/* The UI sample's underline tabs, extended with separate close controls. */
.pwa-tab-item {
  display: flex;
  flex: 0 0 auto;
  align-items: center;
  max-width: 240px;
  border-bottom: 2px solid transparent;
}

.pwa-tab-item.active {
  border-bottom-color: var(--blue);
  color: var(--blue);
  background: var(--blue-soft);
}

.pwa-tab-item [role="tab"] {
  touch-action: pan-y;
  user-select: none;
  cursor: grab;
  display: flex;
  min-width: 0;
  border: 0;
  border-radius: 0;
  background: transparent;
  color: inherit;
  padding: 10px 8px;
  font-size: 12px;
  font-weight: 850;
  line-height: 1.2;
}

.pwa-tab-item [role="tab"]:active { cursor: grabbing; }

.pwa-tab-drop-target {
  outline: 2px dashed var(--blue);
  outline-offset: -2px;
}

.pwa-tab-item [role="tab"] span {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.pwa-tab-close {
  flex: 0 0 auto;
  border: 0;
  background: transparent;
  color: var(--muted);
  padding: 6px;
  margin-right: 4px;
  font-size: 16px;
  line-height: 1;
  border-radius: 4px;
}

.pwa-tab-item:hover,
.pwa-tab-close:hover:not(:disabled) {
  background: var(--surface-soft);
}

.pwa-tabs-toolbar button:focus-visible,
.pwa-link-menu button:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: -2px;
}

.pwa-tabs-toolbar button:disabled {
  opacity: 0.35;
  cursor: default;
}

.pwa-tabs-toolbar .icon-button {
  flex: 0 0 auto;
  width: 30px;
  height: 30px;
  padding: 0;
}

.pwa-tabs-panels {
  flex: 1;
  min-height: 0;
  position: relative;
}

.pwa-tab-panel {
  position: absolute;
  inset: 0;
}

.pwa-tab-panel[hidden] { display: none; }

.pwa-tab-panel iframe {
  display: block;
  width: 100%;
  height: 100%;
  border: 0;
}

.pwa-tab-loading {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  background: var(--page);
  color: var(--muted);
  pointer-events: none;
}

.pwa-tab-error {
  position: absolute;
  inset: 0;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  background: var(--page);
}

.pwa-link-menu {
  padding: 4px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  color: var(--text);
  box-shadow: var(--shadow);
}

.pwa-link-menu button {
  border: 0;
  border-radius: 4px;
  padding: 8px 12px;
  background: transparent;
  color: inherit;
}

.pwa-link-menu button:hover { background: var(--blue-soft); }