/* ─────────────────────────────────────────────────────────────
   chip-select — chat-style dropdown skin over a native <select>
   (paired with js/chip-select.js). All rules are scoped under
   `.chip-select` so loading this file never restyles a page's own
   `.chip` / `.menu` / `.dropdown` elements.
   ───────────────────────────────────────────────────────────── */

.chip-select { position: relative; display: inline-block; }
.chip-select.form-dd { width: 100%; }

/* The real <select> stays in the DOM (functional) but out of sight. */
.chip-select .cs-native {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px; border: 0;
  clip: rect(0 0 0 0); clip-path: inset(50%);
  overflow: hidden;
  pointer-events: none;
}

/* Trigger ("chip") — sized as a form field. */
.chip-select .chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  height: 36px;
  padding: 0 10px;
  justify-content: space-between;
  background: rgba(var(--well-rgb), var(--well-a22));
  border: 1px solid rgba(var(--wash-rgb), 0.10);
  border-radius: 9px;
  color: var(--text-7);
  font: 400 13px 'Inter', sans-serif;
  cursor: pointer;
  transition: border-color 0.16s ease, background 0.16s ease;
}
.chip-select .chip:hover { border-color: rgba(var(--wash-rgb), 0.20); }
.chip-select .chip.open { border-color: rgba(var(--wash-rgb), 0.28); background: rgba(var(--well-rgb), var(--well-a30)); }
.chip-select .chip.is-empty .chip-label { color: var(--muted-2); }
.chip-select .chip-label {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  text-align: left;
}
.chip-select .chev {
  display: inline-flex;
  flex-shrink: 0;
  opacity: 0.55;
  transition: transform 0.2s ease;
}
.chip-select .chip.open .chev { transform: rotate(180deg); }

/* Popup menu — the "glass" look from the chat composer. */
.chip-select .menu {
  position: absolute;
  top: calc(100% + 6px);
  left: 0;
  min-width: 100%;
  max-height: 300px;
  overflow-y: auto;
  overscroll-behavior: contain;
  padding: 6px;
  background: linear-gradient(180deg, rgba(var(--glass-hi-rgb), 0.97), rgba(var(--glass-lo-rgb), 0.97));
  border: 1px solid rgba(var(--wash-rgb), 0.08);
  border-radius: 12px;
  box-shadow:
    0 20px 40px -12px rgba(0, 0, 0, 0.7),
    inset 0 1px 0 rgba(var(--wash-rgb), 0.04);
  backdrop-filter: blur(14px);
  z-index: 40;
  opacity: 0;
  transform: translateY(-4px);
  pointer-events: none;
  transition: opacity 0.16s ease, transform 0.16s ease;
  scrollbar-width: thin;
  scrollbar-color: rgba(var(--wash-rgb), 0.18) transparent;
}
.chip-select .menu.open { opacity: 1; transform: translateY(0); pointer-events: auto; }

.chip-select .menu-item {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  padding: 9px 10px;
  background: transparent;
  border: 0;
  border-radius: 8px;
  color: var(--text-4);
  font: 400 13px 'Inter', sans-serif;
  text-align: left;
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease;
}
.chip-select .menu-item:hover { background: rgba(var(--wash-rgb), 0.05); color: var(--text); }

/* Type-to-filter field (opt-in: data-cs-search on the <select>). Sticks to
   the top of the scrolling menu; negative margins bleed it over the menu's
   6px padding so it spans edge to edge, and the near-opaque background hides
   rows scrolling beneath it. Mirrors the chat composer's .menu-search. */
.chip-select .menu-search {
  position: sticky;
  top: -6px;
  z-index: 2;
  display: flex;
  align-items: center;
  gap: 7px;
  margin: -6px -6px 4px;
  padding: 9px 12px;
  background: rgba(var(--dk5-rgb), 0.98);
  border-bottom: 1px solid rgba(var(--wash-rgb), 0.07);
  border-radius: 12px 12px 0 0;
}
.chip-select .menu-search .ms-icon { display: inline-flex; color: var(--muted-2); flex-shrink: 0; }
.chip-select .menu-search .ms-input {
  flex: 1;
  min-width: 0;
  padding: 0;
  background: transparent;
  border: 0;
  outline: none;
  color: var(--text);
  font-family: inherit;
  font-size: 12.5px;
}
.chip-select .menu-search .ms-input::placeholder { color: var(--muted-3); }

/* Filter-chip row (opt-in: data-cs-filters on the <select>). Same look as
   the chat model menu's cost-tier row (css/chat.css .menu-tiers). */
.chip-select .menu-tiers {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin: 8px -2px 4px;
  padding: 0 2px 8px;
  border-bottom: 1px solid rgba(var(--wash-rgb), 0.06);
}
.chip-select .menu-tier {
  padding: 3px 9px;
  background: rgba(var(--wash-rgb), 0.04);
  border: 1px solid rgba(var(--wash-rgb), 0.08);
  border-radius: 999px;
  color: var(--muted-2);
  font-family: inherit;
  font-size: 10.5px;
  font-weight: 500;
  line-height: 1.2;
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}
.chip-select .menu-tier:hover { color: var(--text); background: rgba(var(--wash-rgb), 0.08); }
.chip-select .menu-tier.is-active {
  color: #fff;
  background: var(--accent);
  border-color: var(--accent);
}

/* Row hidden by the search query and/or the active filter chip. */
.chip-select .menu-item.cs-off,
.chip-select .menu-empty.cs-off { display: none !important; }
.chip-select .menu-empty {
  padding: 10px;
  color: var(--muted-2);
  font-size: 12.5px;
}

/* Non-interactive section header, rendered from a native <optgroup>. */
.chip-select .menu-group {
  padding: 10px 10px 4px;
  color: var(--muted-3);
  font: 600 10.5px 'Inter', sans-serif;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.chip-select .menu-group:first-child { padding-top: 4px; }
.chip-select .menu-item .mi-label { flex: 1; min-width: 0; }
.chip-select .menu-item .mi-check { opacity: 0; color: var(--accent); display: inline-flex; flex-shrink: 0; }
.chip-select .menu-item.selected .mi-check { opacity: 1; }