.xh-agent-material-popover{max-height:min(420px,60vh);overflow:hidden;display:flex;flex-direction:column}
.xh-agent-material-list{min-height:0;overflow-y:auto}
.xh-agent-material-actions{display:flex;align-items:center;gap:8px}
.xh-agent-material-head .xh-agent-material-actions button{min-width:32px;min-height:32px;padding:4px 8px;flex:none}
.xh-agent-material-head [data-action=close-materials]{font-size:22px;line-height:1;color:#f1f5fc}
.xh-agent-material-actions button:focus-visible{outline:2px solid #97b9ff;outline-offset:2px}