.testix-copilot-chat{border:1px solid #e5e7eb;border-radius:12px;max-width:520px;min-height:420px;display:flex;flex-direction:column;overflow:hidden;background:#fff;font-family:system-ui,-apple-system,Segoe UI,Roboto,Arial}
.testix-copilot-chat .tc-header{padding:12px 14px;font-weight:600;border-bottom:1px solid #eef2f7;background:#f8fafc}
.testix-copilot-chat .tc-messages{flex:1;padding:14px;overflow:auto;display:flex;flex-direction:column;gap:10px}
.testix-copilot-chat .tc-footer{display:flex;gap:8px;padding:12px;border-top:1px solid #eef2f7;background:#fff}
.testix-copilot-chat .tc-input{flex:1;padding:10px 12px;border:1px solid #d1d5db;border-radius:10px;outline:none}
.testix-copilot-chat .tc-input:focus{border-color:#94a3b8}
.testix-copilot-chat .tc-send{padding:10px 14px;border:1px solid #0f172a;background:#0f172a;color:#fff;border-radius:10px;cursor:pointer}
.testix-copilot-chat .tc-send:hover{background:#111827}
.testix-copilot-chat .tc-msg{display:flex}
.testix-copilot-chat .tc-msg-user{justify-content:flex-end}
.testix-copilot-chat .tc-msg-assistant{justify-content:flex-start}
.testix-copilot-chat .tc-msg-system{justify-content:center}
.testix-copilot-chat .tc-bubble{max-width:85%;padding:10px 12px;border-radius:12px;white-space:pre-wrap;line-height:1.35;font-size:14px}
.testix-copilot-chat .tc-msg-user .tc-bubble{background:#2563eb;color:#fff;border-top-right-radius:4px}
.testix-copilot-chat .tc-msg-assistant .tc-bubble{background:#f1f5f9;color:#0f172a;border-top-left-radius:4px}
.testix-copilot-chat .tc-msg-system .tc-bubble{background:#fff7ed;color:#9a3412;border:1px solid #fed7aa}

@keyframes tcPulse{0%{transform:scale(1);box-shadow:0 0 0 0 rgba(37,99,235,.18)}70%{transform:scale(1.012);box-shadow:0 0 0 10px rgba(37,99,235,0)}100%{transform:scale(1);box-shadow:0 0 0 0 rgba(37,99,235,0)}}
.testix-copilot-chat .tc-msg-assistant .tc-bubble.tc-pulse{animation:tcPulse 1.15s ease-in-out infinite;will-change:transform,box-shadow}