.structure-picker {
  --structure-picker-accent: var(--unit-accent, var(--accent, #60a5fa));
  position: relative;
  min-width: 0;
}

.structure-picker-trigger {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 12px;
  width: 100%;
  min-height: 44px;
  padding: 7px 12px;
  border: 1px solid var(--control-border);
  border-radius: 8px;
  background: var(--control-bg);
  color: var(--text);
  font: inherit;
  text-align: left;
}

.structure-picker-trigger:hover,
.structure-picker-trigger:focus-visible,
.structure-picker-trigger[aria-expanded="true"] {
  outline: none;
  border-color: color-mix(in srgb, var(--structure-picker-accent) 68%, var(--control-border));
  box-shadow: 0 0 0 2px color-mix(in srgb, var(--structure-picker-accent) 18%, transparent);
}

.structure-picker-trigger:disabled { cursor: not-allowed; opacity: 0.65; }
.structure-picker-trigger-copy { display: grid; min-width: 0; gap: 2px; }

.structure-picker-trigger-copy strong,
.structure-picker-trigger-copy small,
.structure-picker-placeholder {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.structure-picker-trigger-copy strong { color: var(--text); font-size: 0.92rem; }
.structure-picker-trigger-copy small,
.structure-picker-placeholder { color: var(--muted); font-size: 0.75rem; }
.structure-picker-chevron { color: var(--muted); font-size: 1.15rem; transition: transform 160ms ease; }
.structure-picker-trigger[aria-expanded="true"] .structure-picker-chevron { transform: rotate(180deg); }

.structure-picker-panel {
  position: absolute;
  z-index: 2600;
  top: calc(100% + 6px);
  left: 0;
  display: grid;
  width: min(520px, calc(100dvw - 24px));
  gap: 0;
  padding: 0;
  border: 1px solid color-mix(in srgb, var(--structure-picker-accent) 35%, var(--control-border));
  border-radius: 10px;
  background: var(--panel);
  box-shadow: 0 18px 42px rgb(0 0 0 / 0.38);
  overflow: hidden;
}

.structure-picker-panel[hidden] { display: none; }
.structure-picker-header {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  min-width: 0;
  min-height: 42px;
  border-bottom: 1px solid var(--control-border);
  background: color-mix(in srgb, var(--structure-picker-accent) 12%, var(--panel));
}

.structure-picker-nav { display: grid; grid-template-columns: auto minmax(0, 1fr); align-items: center; gap: 12px; min-width: 0; padding: 7px 12px; }
.structure-picker-nav > div { display: grid; min-width: 0; gap: 2px; }
.structure-picker-nav strong,
.structure-picker-nav small { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.structure-picker-nav strong { color: var(--text); font-size: 0.88rem; }
.structure-picker-nav small { color: var(--muted); font-size: 0.72rem; }

.structure-picker-back {
  display: inline-grid;
  place-items: center;
  width: 28px;
  min-height: 28px;
  padding: 0;
  border: 1px solid var(--control-border);
  border-radius: 7px;
  background: var(--control-bg);
  color: var(--text);
}

.structure-picker-back:disabled {
  cursor: default;
  opacity: 0.62;
}

.structure-picker-current,
.structure-picker-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 12px;
  width: 100%;
  min-height: 56px;
  padding: 10px 11px;
  border: 1px solid var(--control-border);
  border-radius: 8px;
  background: color-mix(in srgb, var(--control-bg) 92%, transparent);
  color: var(--text);
  font: inherit;
  text-align: left;
}

.structure-picker-current {
  border-color: color-mix(in srgb, var(--structure-picker-accent) 44%, var(--control-border));
  background: color-mix(in srgb, var(--structure-picker-accent) 10%, var(--control-bg));
}

.structure-picker-current--all { min-height: 42px; }
.structure-picker-current > span { color: var(--structure-picker-accent); font-size: 0.72rem; font-weight: 850; text-transform: uppercase; }
.structure-picker-current > strong { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.structure-picker-current--all {
  grid-template-columns: auto minmax(0, 1fr);
  min-width: 0;
  padding: 8px 10px 8px 14px;
  border: 0;
  border-radius: 0;
  background: transparent;
}

.structure-picker-current--all > span {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  white-space: nowrap;
}

.structure-picker-current--all > span > b {
  display: inline-grid;
  place-items: center;
  width: 16px;
  height: 16px;
  border: 2px solid currentColor;
  border-radius: 50%;
  font-size: 0.64rem;
  line-height: 1;
}

.structure-picker-current--all > strong {
  justify-self: end;
  min-width: 0;
  font-size: 0.88rem;
}

.structure-picker-current--summary {
  cursor: default;
}

.structure-picker-panel > .structure-picker-current:not(.structure-picker-current--all) {
  width: auto;
  margin: 0 12px 6px;
}

.structure-picker-close {
  display: inline-grid;
  place-items: center;
  width: 36px;
  min-height: 42px;
  padding: 0;
  border: 0;
  border-left: 1px solid var(--control-border);
  background: transparent;
  color: var(--muted);
  font: inherit;
  font-size: 1.35rem;
  line-height: 1;
}

.structure-picker-list {
  display: grid;
  max-height: min(280px, 44dvh);
  gap: 6px;
  padding: 0 12px 10px;
  overflow-y: auto;
  overscroll-behavior: contain;
  scrollbar-width: thin;
}

.structure-picker-row > span { display: grid; min-width: 0; gap: 2px; }
.structure-picker-row strong { color: var(--text); font-size: 0.85rem; }
.structure-picker-row small { color: var(--muted); font-size: 0.7rem; font-weight: 650; }
.structure-picker-row > b { color: var(--muted); font-size: 1.15rem; }

.structure-picker-current:hover,
.structure-picker-current:focus-visible,
.structure-picker-row:hover,
.structure-picker-row:focus-visible,
.structure-picker-back:not(:disabled):hover,
.structure-picker-back:not(:disabled):focus-visible {
  outline: none;
  border-color: color-mix(in srgb, var(--structure-picker-accent) 62%, var(--control-border));
  background: color-mix(in srgb, var(--structure-picker-accent) 14%, var(--control-bg));
}

.structure-picker-close:hover,
.structure-picker-close:focus-visible {
  outline: none;
  color: var(--text);
  background: color-mix(in srgb, var(--structure-picker-accent) 10%, transparent);
}

.structure-picker-current.is-selected,
.structure-picker-row.is-selected {
  border-color: color-mix(in srgb, var(--structure-picker-accent) 72%, var(--control-border));
  background: color-mix(in srgb, var(--structure-picker-accent) 16%, var(--control-bg));
}

.structure-picker-row.is-disabled { cursor: not-allowed; opacity: 0.55; }
.structure-picker-empty { padding: 10px; border: 1px dashed var(--control-border); border-radius: 8px; color: var(--muted); font-size: 0.78rem; }

@media (max-width: 520px) {
  .structure-picker-panel { width: calc(100dvw - 24px); }
}