style.css

* {
  margin: 0;
  padding: 0%;
  box-sizing: border-box;
}

:root {
  font-family: "Poppins", sans-serif;

  --color-1: #e63946;
  --color-2: #f1faee;
  --color-3: #a8dadc;
  --color-4: #457b9d;
  --color-5: #1d3557;
}

html,
body {
  width: 100%;
  height: 100%;
  background-color: var(--color-2);
}

.main {
  width: 100%;
  height: 100vh;
  padding: 0;
  display: flex;
  justify-content: center;
  align-items: center;
}

.welcome {
  display: none;
}

.welcome.active {
  width: 100%;
  height: 90vh;
  border: 1px dashed black;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 10px;
  position: absolute;
  background-color: white;
  background-color: var(--color-2);
  border: none;
}

.welcome .welcome-btn {
  padding: 5px;
  height: 40px;
  width: 30%;
  color: #f1faee;
  border: none;
  font-size: 20px;
  font-family: "Poppins", sans-serif;
  border-radius: 5px;
  font-weight: 500;
}

#he-btn {
  background-color: #e63946;
}

#she-btn {
  background-color: #457b9d;
}

.container.active {
  width: 50%;
  height: 95%;
  background-color: #f1faee;
  border-radius: 1rem;
  box-shadow: 5px 5px 15px 3px rgba(164, 164, 177, 0.589);
}

/* input box */
.container.active .text-area {
  height: 10%;
  padding: 10px;
  display: flex;
  gap: 5px;
  justify-content: space-evenly;
  align-items: center;
}

.container.active .text-area .onlineStatusDot {
  font-size: 25px;
  color: rgba(0, 0, 0, 0.5);
}

@keyframes blink {
  0% {
    opacity: 1;
  }
  50% {
    opacity: 0;
  }
  100% {
    opacity: 1;
  }
}

.container.active .text-area .onlineStatusDot.typing {
  animation: blink 1.5s ease-in infinite;
}

.container.active .input-field {
  width: 80%;
  height: 45px;
  padding: 10px;
  background-color: #1d3557;
  color: #f1faee;
  font-size: 18px;
  line-height: 20px;
  border-radius: 10px;
  border: none;
  box-shadow: 0px 0px 10px 3px rgba(1, 1, 43, 0.199);
  resize: none;
  font-family: "Poppins", sans-serif;
  position: relative;
}

.container.active .input-field::placeholder {
  font-family: "Poppins", sans-serif;
  font-size: 17px;
  line-height: 20px;
  color: rgba(128, 128, 128, 0.466);
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
}

.container.active .input-field:focus {
  outline: none;
  font-family: "Poppins", sans-serif;
  line-height: 20px;
}

.container.active .input-field::-webkit-scrollbar {
  display: none;
}

.container.active .text-area .send-btn {
  height: 50px;
  width: 50px;
  font-size: 20px;
  border-radius: 50%;
  background-color: #1d3557;
  border: none;
  color: rgba(255, 255, 255, 0.5);
  box-shadow: 0px 0px 10px 3px rgba(1, 1, 43, 0.349);
}

.container.active .text-area .send-btn.active {
  color: rgb(0, 230, 118);
}

/* chatting area */
.container.active .chat-area {
  height: 90%;
  width: 100%;
  border-radius: 1rem 1rem 0 0;
  display: flex;
  flex-direction: column-reverse;
  padding: 8px;
  overflow: auto;
  overflow-x: hidden;
}

.container.active .chat-area::-webkit-scrollbar {
  width: 5px;
}

.container.active .chat-area::-webkit-scrollbar-thumb {
  background-color: rgba(128, 128, 128, 0.658);
  border-radius: 5px;
  height: 10vh;
}

.container.active .chat-area::-webkit-scrollbar-track {
  background-color: transparent;
}

.chat-area .message-box {
  margin: 3px 0;
}

.chat-area .message-box .message {
  display: flex;
}

.chat-area .message-box .message .text {
  position: relative;
  width: fit-content;
  max-width: 80%;
  font-size: 15px;
  text-align: justify;
  line-height: 20px;
  padding: 7px 7px;
  border-radius: 10px;
  background-color: var(--color-5);
  color: var(--color-2);
}

.chat-area .message-box .message .text .time {
  margin-left: 10px;
  color: rgba(255, 255, 255, 0.4);
  font-size: 9px;
  position: absolute;
  right: 3px;
  bottom: 0px;
}

.chat-area .message-box .message .text .time,
.chat-area .message-box .message .text .space {
  user-select: none;
}

.chat-area .message-box .message .text .fa-solid.fa-check-double.read-receipt {
  color: rgba(255, 255, 255, 0.5);
}

/* media query */
@media (max-width: 500px) {
  .main {
    height: 90vh;
  }

  .container.active {
    width: 100%;
    height: 100%;
  }
}