* {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 0;
}

textarea {
  height: 40px;
  min-height: 50px;
  border-radius: 4px;
}

.info-block {
  width: 100%;
  font-weight: 500;
  height: 40px;
  display: flex;
  justify-content: center;
  align-items: center;
}

.close-warning {
  height: 30px;
}

.header {
  display: flex;
  align-items: center;
}

.main-input {
  max-width: 200px;
}

.avatar {
  border-radius: 100%;
  background-color: #17a2b8;
  color: white;
  height: 60px;
  width: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  padding-bottom: 5px;
  font-weight: 500;
}

#send-btn {
  font-size: 1.2rem;
}

#message {
  width: 100%;
  font-size: 1.2rem;
}

.dropdown-menu.show {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  max-width: 1080px;
  transform: translate3d(0px, 65px, 0px) !important;
}

.dropdown-item {
  text-align: center;
  font-size: 1.589rem;
  width: auto;
}

#fontSize {
  outline: none;
  font-size: 16px;
  width: 50px;
}

@media screen and (max-width: 768px) {
  .dropdown-item {
    font-size: 1.2rem;
  }

  #messages {
    margin: auto 0px auto 0px;
  }

  #input-group {
    margin: auto 0px auto 0px;
  }
  .header {
    flex-direction: column;
  }

  .header h1 {
    font-size: 2.1rem;
  }

  .setting {
    margin-top: 7px;
  }
  #warning-block {
    font-size: 1rem;
  }
  .dropdown-menu.show {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    max-width: 1080px;
    transform: translate3d(0px, -275px, 0px) !important;
  }
}

@media screen and (max-width: 425px) {
  #warning-block {
    font-size: 0.8rem;
  }
  .dropdown-menu.show {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    max-width: 1080px;
    transform: translate3d(0px, -385px, 0px) !important;
  }
  #nickname {
    font-size: 1.2rem;
  }
  .avatar {
    font-size: 1.3rem;
    height: 50px;
    width: 50px;
    padding-bottom: 3px;
  }
  #message {
    font-size: 0.9rem;
  }
  #send-btn {
    font-size: 1rem;
  }
}

@media screen and (max-width: 320px) {
  #warning-block {
    font-size: 0.7rem;
  }
  .dropdown-menu.show {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    max-width: 1080px;
    transform: translate3d(0px, -495px, 0px) !important;
  }
}