:root {
  --cb-bg: #ffffff;
  --cb-primary: #5a67d8;
  --cb-text: #1f2937;
  --cb-muted: #6b7280;
  --cb-border: #e5e7eb;
  --cb-shadow: 0 12px 30px rgba(0,0,0,.15);
  --cb-radius: 18px;
}
.cb-launcher{
  position: fixed; right: 18px; bottom: 18px;
  width: 56px; height: 56px; border-radius: 999px;
  background: var(--cb-primary); color:#fff; display:flex; align-items:center; justify-content:center;
  cursor:pointer; box-shadow: var(--cb-shadow); font-size: 24px; z-index: 9999;
}
.cb-launcher:focus{ outline: 3px solid #c7d2fe; }
.cb-widget{
  position: fixed; right: 18px; bottom: 86px; width: 360px; max-width: calc(100vw - 36px);
  background: var(--cb-bg); border: 1px solid var(--cb-border); border-radius: var(--cb-radius);
  box-shadow: var(--cb-shadow); display:none; flex-direction: column; overflow: hidden; z-index: 10000;
}
.cb-header{
  display:flex; align-items:center; justify-content: space-between;
  padding: 12px 14px; background:#f8fafc; border-bottom:1px solid var(--cb-border);
}
.cb-title{ font-weight: 800; color:var(--cb-text); }
.cb-close{ background:none; border:none; font-size: 22px; cursor:pointer; line-height:1; color:#111827; }
.cb-messages{ padding: 14px; height: 360px; overflow:auto; background: #fff; }
.cb-bubble{
  max-width: 80%; padding: 10px 12px; margin: 8px 0; border-radius: 14px; line-height: 1.35;
  word-break: break-word;
}
.cb-bot{ background:#f3f4f6; color:#111827; border-top-left-radius: 4px; }
.cb-user{ background: var(--cb-primary); color: #fff; margin-left:auto; border-top-right-radius: 4px; }
.cb-inputbar{
  display:flex; gap:8px; padding: 10px; border-top:1px solid var(--cb-border); background:#f9fafb;
}
.cb-inputbar input{
  flex:1; border:1px solid var(--cb-border); border-radius: 10px; padding: 10px 12px; font-size: 14px;
}
.cb-inputbar .cb-send{
  background: var(--cb-primary); color:#fff; border:none; border-radius: 10px; padding: 0 14px; cursor:pointer;
}
.cb-quick{ display:flex; flex-wrap: wrap; gap:8px; padding: 10px; border-top:1px solid var(--cb-border); background:#fff; }
.cb-chip{
  border:1px solid var(--cb-border); background:#fff; color:#111827; padding:6px 10px; border-radius:999px; cursor:pointer;
  font-size: 13px;
}
.cb-chip:hover{ background:#f3f4f6; }
.cb-note{ color: var(--cb-muted); font-size: 12px; margin-top: 4px; }
.cb-small{ font-size: 12px; color: var(--cb-muted); }
.cb-divider{ height:1px; background:var(--cb-border); margin: 10px 0; }