/* ==========================================
   Channel Models — v0.20.0 Phase 2
   Model pills, @mention autocomplete, add dialog
   ========================================== */

/* ── Model Pills (chat header) ───────────── */

.ch-model-pills {
    display: none; /* shown by JS when roster > 1 */
    align-items: center;
    gap: 4px;
    padding: 0 8px;
    flex-shrink: 1;
    overflow-x: auto;
    scrollbar-width: none;
}
.ch-model-pills::-webkit-scrollbar { display: none; }

.ch-model-pill {
    display: inline-flex;
    align-items: center;
    gap: 2px;
    padding: 2px 8px;
    border-radius: 12px;
    background: var(--bg-secondary, #f0f0f0);
    border: 1px solid var(--border-color, #ddd);
    font-size: 0.75rem;
    white-space: nowrap;
    cursor: default;
    transition: background 0.15s;
}
.ch-model-pill.ch-model-default {
    background: var(--accent-bg, #e8f0fe);
    border-color: var(--accent-color, #4a8af4);
}
.ch-model-pill-name {
    cursor: pointer;
    user-select: none;
}
.ch-model-pill-name:hover {
    text-decoration: underline;
}
.ch-model-pill-remove {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 0.65rem;
    color: var(--text-secondary, #888);
    padding: 0 2px;
    line-height: 1;
    opacity: 0.6;
    transition: opacity 0.15s;
}
.ch-model-pill-remove:hover {
    opacity: 1;
    color: var(--error-color, #d32f2f);
}

.ch-model-add-btn {
    background: none;
    border: 1px dashed var(--border-color, #ccc);
    border-radius: 12px;
    padding: 2px 8px;
    font-size: 0.75rem;
    cursor: pointer;
    color: var(--text-secondary, #888);
    white-space: nowrap;
    transition: color 0.15s, border-color 0.15s;
}
.ch-model-add-btn:hover {
    color: var(--text-primary, #333);
    border-color: var(--text-primary, #333);
}

/* ── Add Model Dialog ────────────────────── */

.ch-model-add-dialog {
    position: fixed;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0,0,0,0.4);
    z-index: 1100;
}
.ch-model-add-inner {
    background: var(--bg-primary, #fff);
    border-radius: 12px;
    padding: 24px;
    min-width: 320px;
    max-width: 420px;
    box-shadow: 0 8px 32px rgba(0,0,0,0.2);
}
.ch-model-add-inner h3 {
    margin: 0 0 16px;
    font-size: 1rem;
}
.ch-model-add-inner label {
    display: block;
    margin-bottom: 12px;
    font-size: 0.85rem;
    color: var(--text-secondary, #666);
}
.ch-model-add-inner select,
.ch-model-add-inner input[type="text"] {
    display: block;
    width: 100%;
    margin-top: 4px;
    padding: 8px;
    border: 1px solid var(--border-color, #ddd);
    border-radius: 6px;
    font-size: 0.9rem;
    background: var(--bg-primary, #fff);
    color: var(--text-primary, #333);
    box-sizing: border-box;
}
.ch-model-add-actions {
    display: flex;
    gap: 8px;
    justify-content: flex-end;
    margin-top: 16px;
}

/* ── @mention Autocomplete ───────────────── */

.mention-ac {
    position: fixed;
    z-index: 1050;
    background: var(--bg-primary, #fff);
    border: 1px solid var(--border-color, #ddd);
    border-radius: 8px;
    box-shadow: 0 4px 16px rgba(0,0,0,0.15);
    max-height: 200px;
    overflow-y: auto;
    padding: 4px 0;
}
.mention-ac-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 12px;
    cursor: pointer;
    gap: 12px;
    transition: background 0.1s;
}
.mention-ac-item:hover,
.mention-ac-item.mention-ac-active {
    background: var(--bg-secondary, #f5f5f5);
}
.mention-ac-name {
    font-weight: 500;
    font-size: 0.85rem;
}
.mention-ac-model {
    font-size: 0.75rem;
    color: var(--text-secondary, #999);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 160px;
}

/* ── Model Attribution (multi-model messages) ─ */

.msg-model-label {
    display: inline-block;
    font-size: 0.7rem;
    font-weight: 600;
    padding: 1px 6px;
    border-radius: 4px;
    background: var(--bg-secondary, #f0f0f0);
    color: var(--text-secondary, #666);
    margin-left: 6px;
    vertical-align: middle;
}

/* Model separator in multi-model stream */
.model-stream-divider {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 0 4px;
    font-size: 0.8rem;
    color: var(--text-secondary, #888);
    font-weight: 500;
}
.model-stream-divider::before,
.model-stream-divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--border-color, #eee);
}

/* ── Mobile ──────────────────────────────── */

@media (max-width: 768px) {
    .ch-model-pills {
        max-width: 50vw;
    }
    .ch-model-add-inner {
        min-width: auto;
        margin: 0 16px;
    }
    .mention-ac {
        left: 8px !important;
        right: 8px;
        min-width: auto !important;
    }
}