body {
  margin: 0;
  font-family: system-ui, Arial;
  background: #f4f6f9;
}

header {
  background: #1a73e8;
  color: white;
  padding: 16px;
  text-align: center;
}

#chat {
  padding: 12px;
  padding-bottom: 120px;
}

.msg {
  background: white;
  border-radius: 14px;
  padding: 12px;
  margin-bottom: 12px;
  box-shadow: 0 3px 8px rgba(0,0,0,.1);
}

.msg.latest {
  border: 2px solid #1a73e8;
}

.row {
  display: flex;
  gap: 8px;
}

.row input {
  flex: 1;
  border: none;
  font-size: 16px;
  outline: none;
}

.row button {
  border: none;
  background: #1a73e8;
  color: white;
  border-radius: 10px;
  padding: 0 14px;
  font-size: 18px;
}

#micBtn {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  width: 70px;
  height: 70px;
  border-radius: 50%;
  border: none;
  font-size: 32px;
  background: #1a73e8;
  color: white;
  box-shadow: 0 6px 20px rgba(0,0,0,.3);
}