#topaz-chat{position:fixed;inset-block-end:20px;inset-inline-end:20px;z-index:120}
.tc-fab{width:58px;height:58px;border-radius:50%;border:none;background:var(--teal);color:#fff;font-size:26px;
  cursor:pointer;box-shadow:0 8px 24px rgba(20,64,59,.35);transition:.2s}
.tc-fab:hover{transform:scale(1.06)}
.tc-panel{position:absolute;inset-block-end:72px;inset-inline-end:0;width:340px;max-width:calc(100vw - 40px);
  height:460px;max-height:calc(100vh - 120px);background:var(--surface);border:1px solid var(--border);
  border-radius:18px;box-shadow:0 16px 48px rgba(0,0,0,.25);flex-direction:column;overflow:hidden;
  display:none}
.tc-panel.open{display:flex}
.tc-head{background:linear-gradient(120deg,var(--deep),var(--teal));color:#fff;padding:14px 16px;font-weight:800;
  display:flex;align-items:center;justify-content:space-between}
.tc-close{background:transparent;border:none;color:#fff;font-size:18px;cursor:pointer}
.tc-body{flex:1;overflow-y:auto;padding:14px;display:flex;flex-direction:column;gap:10px}
.tc-msg{max-width:80%;padding:10px 14px;border-radius:14px;line-height:1.5;font-size:14px}
.tc-msg.bot{background:var(--bg);color:var(--ink);align-self:flex-start;border-end-start-radius:4px}
.tc-msg.me{background:var(--teal);color:#fff;align-self:flex-end;border-end-end-radius:4px}
.tc-acts{display:flex;flex-wrap:wrap;gap:8px;align-self:flex-start}
.tc-act{background:transparent;border:1.5px solid var(--teal);color:var(--teal);border-radius:20px;
  padding:6px 14px;font-size:13px;font-weight:700;cursor:pointer;font-family:inherit}
.tc-act:hover{background:var(--teal);color:#fff}
.tc-input{display:flex;gap:8px;padding:10px;border-top:1px solid var(--border)}
.tc-input input{flex:1;border:1px solid var(--border);border-radius:20px;padding:10px 14px;font-family:inherit;
  font-size:14px;background:var(--bg);color:var(--ink)}
.tc-input button{background:var(--teal);color:#fff;border:none;width:40px;height:40px;border-radius:50%;
  font-size:16px;cursor:pointer;flex-shrink:0}
@media(max-width:640px){.tc-panel{width:calc(100vw - 24px)}#topaz-chat{inset-inline-end:12px;inset-block-end:12px}}