index.css

:root {
  --primary-color: #724ae8;
}

*,
*:before,
*:after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;

  text-decoration: none;
  border: none;
  outline: none;
  list-style: none;
}

body {
  background-color: #d6dce1;
  font-family: "Poppins", sans-serif;
}

/* =================================
    Open and Close Chat Bot Box 
    ================================*/
.chatbot-toggler {
  position: fixed;
  right: 40px;
  bottom: 35px;
  width: 50px;
  aspect-ratio: 1/1;
  color: #fff;
  background-color: var(--primary-color);
  border-radius: 50%;
  cursor: pointer;

  display: flex;
  justify-content: center;
  align-items: center;
}

.chatbot-toggler span {
  position: absolute;
}

.show-chatbot .chatbot-toggler span:first-child,
.chatbot-toggler span:last-child {
  opacity: 0;
}

.show-chatbot .chatbot-toggler span:last-child {
  opacity: 1;
}

/* ===============
    Chat Bot 
    ============== */
.chatbot {
  transform: scale(0.5);
  opacity: 0;
  pointer-events: none;

  position: fixed;
  right: 40px;
  bottom: 100px;
  width: 420px;
  background-color: #fff;
  border-radius: 15px;
  box-shadow: 0 0 128px 0 rgba(0, 0, 0, 0.1),
    0 32px 64px -48px rgba(0, 0, 0, 0.5);
  overflow: hidden;
}

.show-chatbot .chatbot {
  transform: scale(01);
  opacity: 1;
  pointer-events: auto;
}

/* ================
    Chat BOt Title 
    =============== */

.chatbot header {
  background-color: var(--primary-color);
  padding: 16px 0;
  text-align: center;
  position: relative;
}
.chatbot header h2 {
  color: #fff;
  font-size: 1.4rem;
}

.chatbot header span {
  display: none;
  position: absolute;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  color: #fff;
  cursor: pointer;
}

/* ===========================
    Chat Bot Box Conversation 
    ===========================*/

.chatbot .chatbox {
  height: 510px;
  overflow-y: auto;
  padding: 30px 20px 70px;
}

.chatbox .chat {
  display: flex;
}

.chatbot .chat p {
  color: #fff;
  max-width: 75%;
  font-size: 0.95rem;
  padding: 12px 16px;
  border-radius: 10px 10px 0 10px;
  background-color: var(--primary-color);
}

/* ================
    For Bot
    =============== */
.chatbox .incoming p {
  background-color: #f2f2f2;
  color: #000;
}

.chatbox .incoming span {
  align-self: flex-end;

  width: 32px;
  aspect-ratio: 1/1;
  color: #fff;
  background-color: var(--primary-color);
  text-align: center;
  line-height: 32px;
  border-radius: 4px;
  margin: 0 10px 7px 0;
}

/* =============
    For person
    ============= */
.chatbox .outgoing {
  margin: 12px 0;
  justify-content: flex-end;
}

/* ===================
    Chat Form Input 
    ===================*/
.chatbot .chat-input {
  position: absolute;
  bottom: 0;
  width: 100%;
  background-color: #fff;
  padding: 5px 20px;
  border-top: 1px solid #ccc;

  display: flex;
  gap: 5px;
  align-items: center;
}

.chat-input textarea {
  width: 100%;
  height: 55px;
  resize: none;
  font-size: 0.95rem;
  padding: 16px 15px 16px 0;
  font-weight: 500;
}

.chat-input span {
  color: var(--primary-color);
  font-size: 1.35rem;
  cursor: pointer;
  visibility: hidden;
}

.chat-input textarea:valid ~ span {
  visibility: visible;
}

@media (max-width: 490px) {
  .chatbot {
    right: 0;
    bottom: 0;
    width: 100%;
    height: 100%;
    border-radius: 0;
  }

  .chatbot .chatbox {
    height: 90%;
  }

  .chatbot header span {
    display: block;
  }
}