.app-shell {
  height: 100dvh;
  display: grid;
  grid-template-rows: auto 1fr;
  gap: 10px;
  padding: 10px;
  overflow: hidden;
}

.topbar,
.filter-rail,
.tree-card,
.detail-drawer {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  min-height: 64px;
  padding: 8px 10px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}

.brand > div,
.section-heading > div {
  min-width: 0;
}

.brand-copy {
  display: grid;
  gap: 2px;
  min-width: 0;
}

.brand-title-row {
  display: flex;
  align-items: center;
  gap: 6px;
  min-width: 0;
}

.brand-title-row h1 {
  min-width: 0;
}

.brand-mark {
  width: 48px;
  height: 48px;
  background: url("/assets/logo/radar-logo-light-96.png") center / cover no-repeat;
  box-shadow: inset 0 0 0 1px rgba(24, 33, 28, 0.08);
  border-radius: 50%;
  flex: 0 0 auto;
}

[data-theme="dark"] .brand-mark {
  background-image: url("/assets/logo/radar-logo-dark-96.png");
  box-shadow: inset 0 0 0 1px rgba(237, 242, 237, 0.08);
}

.brand p,
.meta-line,
.status-line {
  margin-top: 3px;
  color: var(--muted);
  font-size: 12px;
  overflow-wrap: anywhere;
}

.topbar-actions,
.section-heading,
.toolbar {
  display: flex;
  align-items: center;
  gap: 8px;
}

.topbar-actions {
  flex-wrap: wrap;
  justify-content: flex-end;
}

.section-heading {
  justify-content: space-between;
  padding: 9px 10px 7px;
  border-bottom: 1px solid var(--line);
}

.tree-heading {
  align-items: flex-start;
  /* Let the title and the navigator wrap as whole units: when they no longer
     fit on one row, the nav drops to its own line below the title rather than
     squeezing the title into a second line. */
  flex-wrap: wrap;
}

/* Keep the title on a single line so the navigator (not the heading text) is
   the thing that wraps to the next row. */
.tree-heading h2 {
  white-space: nowrap;
}

.tree-heading-actions {
  display: flex;
  align-items: center;
  /* Left-pack so a wrapped navigator sits under the title's left edge; on a
     single wide row the parent's space-between still pushes it to the right. */
  justify-content: flex-start;
  flex-wrap: wrap;
  gap: 10px;
  min-width: 0;
}

.button,
.icon-button,
.secondary-button {
  min-height: 32px;
  padding: 0 10px;
  cursor: pointer;
}

/* Consolidated tree navigator: a "Go to" target picker (Tip / Latest stale /
   Latest branch / Latest unknown) plus << < > >> step buttons and one adaptive
   readout. */
.tree-nav {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
}

.nav-goto-label {
  color: var(--muted);
  font-size: 0.85em;
}

.nav-goto {
  min-height: 32px;
  padding: 0 6px;
  cursor: pointer;
}

.nav-readout {
  color: var(--muted);
  font-size: 0.85em;
  white-space: nowrap;
  max-width: 100%;
  overflow: hidden;
  text-overflow: ellipsis;
}

.button:disabled,
.icon-button:disabled {
  opacity: 0.45;
  cursor: default;
}

.icon-button {
  width: 32px;
  padding: 0;
  display: inline-grid;
  place-items: center;
}

.brand-about-button {
  width: 28px;
  min-height: 28px;
  color: var(--muted);
  background: transparent;
  border-color: transparent;
  flex: 0 0 auto;
}

.button:hover,
.icon-button:hover,
.secondary-button:hover {
  border-color: var(--line-strong);
  background: var(--surface-alt);
}

/* Top-right freshness indicator, updated on every data load/refresh. */
.last-updated {
  color: var(--muted);
  font-size: 12px;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

/* Auto-refresh interval picker in the topbar. */
.refresh-control {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--muted);
  font-size: 12px;
}

/* Crisp 16px line icons for icon buttons (refresh-now, theme). */
.ui-icon {
  width: 16px;
  height: 16px;
  display: block;
}

/* Theme button shows the mode it will switch TO: moon in light, sun in dark. */
.theme-icon-sun { display: none; }
[data-theme="dark"] .theme-icon-moon { display: none; }
[data-theme="dark"] .theme-icon-sun { display: block; }