:root {
  --cb-green:  #0a7a52;
  --cb-dark:   #0b140d;
  --cb-white:  #ffffff;
  --cb-off:    #f3f6f2;
  --cb-muted:  #60706a;
  --cb-border: rgba(0,0,0,.09);
  --cb-sans:   "Inter", system-ui, sans-serif;
}

.cb-fab {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 58px;
  height: 58px;
  border-radius: 50%;
  border: none;
  padding: 0;
  cursor: pointer;
  background: transparent;
  box-shadow: 0 4px 20px rgba(0,0,0,.28);
  transition: transform .2s, box-shadow .2s;
  z-index: 9998;
}

.cb-fab:hover {
  transform: scale(1.09);
  box-shadow: 0 6px 28px rgba(0,0,0,.36);
}

.cb-fab img {
  width: 58px;
  height: 58px;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid var(--cb-green);
  display: block;
}

.cb-fab-dot {
  position: absolute;
  bottom: 2px;
  right: 2px;
  width: 13px;
  height: 13px;
  background: #22c55e;
  border-radius: 50%;
  border: 2.5px solid #fff;
}

.cb-panel {
  position: fixed;
  bottom: 96px;
  right: 24px;
  width: 360px;
  height: calc(70vh - 60px);
  border-radius: 18px;
  background: var(--cb-white);
  box-shadow: 0 20px 64px rgba(0,0,0,.22);
  display: flex;
  flex-direction: column;
  z-index: 9997;
  overflow: hidden;
  opacity: 0;
  transform: translateY(14px) scale(.97);
  pointer-events: none;
  transition: opacity .22s ease, transform .22s ease;
  will-change: opacity, transform;
}

.cb-panel.cb-open {
  opacity: 1;
  transform: translateY(0) scale(1);
  pointer-events: all;
}

.cb-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 16px;
  background: linear-gradient(140deg, #051c0f 0%, #0d5e3c 100%);
  flex-shrink: 0;
}

.cb-header-info {
  display: flex;
  align-items: center;
  gap: 10px;
}

.cb-avatar-wrap { position: relative; flex-shrink: 0; }

.cb-avatar {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid rgba(255,255,255,.3);
  display: block;
}

.cb-online-dot {
  position: absolute;
  bottom: 0;
  right: 0;
  width: 10px;
  height: 10px;
  background: #22c55e;
  border-radius: 50%;
  border: 2px solid #0d5e3c;
}

.cb-name {
  font-family: var(--cb-sans);
  font-size: .9rem;
  font-weight: 700;
  color: #fff;
}

.cb-status {
  font-family: var(--cb-sans);
  font-size: .72rem;
  color: rgba(255,255,255,.55);
  margin-top: 1px;
}

.cb-close {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  border: none;
  background: rgba(255,255,255,.12);
  color: rgba(255,255,255,.75);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: .78rem;
  transition: background .18s, color .18s;
  flex-shrink: 0;
}
.cb-close:hover { background: rgba(255,255,255,.22); color: #fff; }

.cb-messages {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  padding: 16px 14px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  background: var(--cb-off);
}

.cb-messages::-webkit-scrollbar { width: 4px; }
.cb-messages::-webkit-scrollbar-track { background: transparent; }
.cb-messages::-webkit-scrollbar-thumb { background: rgba(0,0,0,.14); border-radius: 2px; }

.cb-msg {
  display: flex;
  align-items: flex-end;
  gap: 8px;
}

.cb-msg--ai  { flex-direction: row; }
.cb-msg--user { flex-direction: row-reverse; }

.cb-msg-avatar {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  object-fit: cover;
  border: 1.5px solid var(--cb-border);
  flex-shrink: 0;
  display: block;
}

.cb-bubble {
  max-width: 78%;
  padding: 10px 14px;
  border-radius: 18px;
  font-family: var(--cb-sans);
  font-size: .875rem;
  line-height: 1.58;
  word-break: break-word;
}

.cb-msg--ai .cb-bubble {
  background: var(--cb-white);
  color: #1a2e1f;
  border-bottom-left-radius: 4px;
  box-shadow: 0 1px 4px rgba(0,0,0,.07);
}

.cb-msg--user .cb-bubble {
  background: var(--cb-green);
  color: #fff;
  border-bottom-right-radius: 4px;
}

.cb-typing .cb-bubble {
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 13px 16px;
}

.cb-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--cb-muted);
  animation: cb-bounce .9s infinite;
}
.cb-dot:nth-child(2) { animation-delay: .16s; }
.cb-dot:nth-child(3) { animation-delay: .32s; }

@keyframes cb-bounce {
  0%, 60%, 100% { transform: translateY(0); opacity: .6; }
  30%            { transform: translateY(-5px); opacity: 1; }
}

.cb-footer {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 10px 12px;
  border-top: 1px solid var(--cb-border);
  background: var(--cb-white);
  flex-shrink: 0;
}

.cb-input-row {
  display: flex;
  align-items: center;
  gap: 8px;
}

.cb-char-count {
  font-size: .68rem;
  text-align: right;
  color: #9aada5;
  padding-right: 2px;
  transition: color .15s;
}

.cb-char-count.cb-char-warn { color: #e05050; font-weight: 600; }

.cb-input {
  flex: 1;
  height: 40px;
  padding: 0 16px;
  border: 1.5px solid var(--cb-border);
  border-radius: 100px;
  font-family: var(--cb-sans);
  font-size: .875rem;
  color: #1a2e1f;
  background: var(--cb-off);
  outline: none;
  transition: border-color .18s, background .18s;
}
.cb-input:focus { border-color: var(--cb-green); background: var(--cb-white); }
.cb-input::placeholder { color: #9aada5; }

.cb-send {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: none;
  background: var(--cb-green);
  color: #fff;
  font-size: .95rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: background .18s, transform .18s;
}
.cb-send:hover { background: #065438; transform: scale(1.08); }

@media (max-width: 480px) {
  .cb-panel {
    width: calc(100vw - 32px);
    right: 16px;
    bottom: 90px;
    height: calc(70vh - 60px);
  }
  .cb-fab { bottom: 16px; right: 16px; }
}