.echo-grid{display:grid;grid-template-columns:1fr 2fr 1fr;gap:16px;align-items:start;margin:12px 0}
.echo-col{background:#f7f7f9;border:1px solid #e5e7eb;border-radius:10px;padding:12px}
.echo-col--center{background:#fafafa}
@media(max-width:1024px){.echo-grid{grid-template-columns:1fr}}
.echo-list{list-style:none;padding:0;margin:0}.echo-list li{padding:6px 0;border-bottom:1px dashed #e5e7eb}
.echo-chatbox{min-height:220px;border:1px solid #ddd;padding:12px;border-radius:8px;background:#fff;margin-bottom:10px;max-height:50vh;overflow:auto}
.msg{padding:8px 10px;border-radius:8px;margin-bottom:8px}.msg-user{background:#eef6ff}.msg-assistant{background:#f0fff4}
.button-link-delete{color:#b00020;text-decoration:underline;background:none;border:none;padding:0;cursor:pointer}
.echo-prompt-form textarea{width:100%}