/* ── ZPicker (zp) ──────────────────────────────────────────
   Reusable chip-based multi-select picker: a combobox showing
   the selection as removable chips plus a dropdown panel with
   search and a (optionally grouped) checkbox list.

   Usage:
     <div id="my-picker"></div>
     new ZPicker(document.getElementById('my-picker'), { ... });

   CSS prefix: zp-  (zummit picker)
   ────────────────────────────────────────────────────────── */

.zp-wrap { position: relative; }

/* ── Combobox (trigger with chips) ──────────────────────── */
.zp-combobox {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    min-height: 38px;
    padding: 0.3rem 0.5rem 0.3rem 0.6rem;
    border: 1px solid var(--z-border);
    border-radius: 0.5rem;
    background: var(--z-bg-input);
    cursor: pointer;
    transition: border-color 0.15s, box-shadow 0.15s;
}
.zp-combobox:hover { border-color: var(--z-border-focus); }
.zp-combobox.open {
    border-color: var(--z-primary);
    box-shadow: var(--z-focus-ring);
}

.zp-chips {
    flex: 1;
    display: flex;
    flex-wrap: wrap;
    gap: 0.3rem;
    min-width: 0;
}

.zp-placeholder {
    font-size: 0.85rem;
    color: var(--z-text-faint);
    padding: 0.1rem 0;
}

.zp-chevron {
    flex-shrink: 0;
    color: var(--z-text-faint);
    transition: transform 0.2s;
}
.zp-combobox.open .zp-chevron { transform: rotate(180deg); }

/* ── Chips ──────────────────────────────────────────────── */
/* Pill-Style an das RAG-Quellen-Pill (.pg-source-pill) angeglichen:
   leicht abgerundetes Rechteck, neutrale Farben. */
.zp-chip {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    max-width: 100%;
    padding: 0.2rem 0.45rem;
    border-radius: 0.3rem;
    background: var(--z-bg-subtle);
    border: 1px solid var(--z-border);
    font-size: 0.75rem;
    line-height: 1.4;
    color: var(--z-text-mid);
}
.zp-chip-group {
    color: var(--z-text-faint);
    flex-shrink: 0;
}
.zp-chip-group::after { content: " | "; }
.zp-chip-label {
    font-weight: 500;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.zp-chip-remove {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 16px;
    height: 16px;
    flex-shrink: 0;
    border: none;
    background: transparent;
    color: var(--z-text-faint);
    font-size: 0.95rem;
    line-height: 1;
    cursor: pointer;
    padding: 0;
    transition: color 0.15s;
}
.zp-chip-remove:hover {
    color: var(--z-error-text);
}

/* ── Dropdown Panel ─────────────────────────────────────── */
.zp-panel {
    display: none;
    position: absolute;
    top: calc(100% + 4px);
    left: 0;
    z-index: 50;
    min-width: 100%;
    max-width: 460px;
    overflow-y: auto;
    background: var(--z-bg-card);
    border: 1px solid var(--z-border);
    border-radius: 0.5rem;
    box-shadow: var(--z-shadow-panel);
}
.zp-panel.open { display: block; }

/* Search */
.zp-search-wrap {
    position: sticky;
    top: 0;
    z-index: 1;
    padding: 0.5rem;
    background: var(--z-bg-card);
    border-bottom: 1px solid var(--z-border);
}
.zp-search-inner {
    position: relative;
    display: flex;
    align-items: center;
}
.zp-search {
    width: 100%;
    padding: 0.4rem 1.75rem 0.4rem 0.6rem;
    border: 1px solid var(--z-border);
    border-radius: 0.375rem;
    font-size: 0.78rem;
    outline: none;
    background: var(--z-bg-input, #fff);
}
.zp-search:focus {
    border-color: var(--z-primary);
    box-shadow: var(--z-focus-ring);
}
.zp-search-clear {
    position: absolute;
    right: 0.35rem;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 18px;
    height: 18px;
    border: none;
    background: var(--z-bg-subtle);
    border-radius: 50%;
    cursor: pointer;
    color: var(--z-text-faint);
    font-size: 0.7rem;
    line-height: 1;
    padding: 0;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.15s, color 0.15s;
}
.zp-search-inner.has-value .zp-search-clear {
    opacity: 1;
    pointer-events: auto;
}
.zp-search-clear:hover {
    color: var(--z-text);
    background: var(--z-border);
}

/* ── Group ──────────────────────────────────────────────── */
.zp-group { border-bottom: 1px solid var(--z-border); }
.zp-group:last-child { border-bottom: none; }

.zp-group-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.5rem 0.75rem;
    cursor: pointer;
    user-select: none;
    background: var(--z-bg-subtle);
    transition: background 0.1s;
}
.zp-group-header:hover { background: var(--z-bg-hover); }
.zp-group-headleft {
    display: flex;
    align-items: center;
    gap: 0.35rem;
}
.zp-group-name {
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--z-text-mid);
}
.zp-group-chevron {
    color: var(--z-text-faint);
    transition: transform 0.2s;
}
.zp-group.open .zp-group-chevron { transform: rotate(90deg); }

.zp-group-badge {
    font-size: 0.6rem;
    font-weight: 700;
    background: var(--z-primary);
    color: #fff;
    padding: 0.1rem 0.4rem;
    border-radius: 9999px;
    min-width: 16px;
    text-align: center;
}
.zp-group-badge.empty {
    background: var(--z-bg-subtle);
    color: var(--z-text-faint);
    border: 1px solid var(--z-border);
}

.zp-group-body { display: none; padding: 0.15rem 0; }
.zp-group.open .zp-group-body { display: block; }

/* ── Item Row ───────────────────────────────────────────── */
.zp-flat { padding: 0.15rem 0; }

.zp-item {
    display: flex;
    align-items: center;
    gap: 0.45rem;
    padding: 0.35rem 0.75rem;
    cursor: pointer;
    font-size: 0.8rem;
    color: var(--z-text-mid);
    transition: background 0.1s;
}
.zp-group-body .zp-item { padding-left: 1.25rem; }
.zp-item:hover { background: var(--z-bg-hover); }

.zp-cb {
    width: 15px;
    height: 15px;
    accent-color: var(--z-primary);
    cursor: pointer;
    flex-shrink: 0;
}
.zp-item-label {
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.zp-item-meta {
    font-size: 0.65rem;
    color: var(--z-text-faint);
    flex-shrink: 0;
}

/* ── Empty State ────────────────────────────────────────── */
.zp-empty {
    padding: 1.5rem;
    text-align: center;
    color: var(--z-text-faint);
    font-size: 0.8rem;
}