style.css

/* Fix user-agent */

* {
  box-sizing: border-box;
}

html {
  font-weight: 300;
  -webkit-font-smoothing: antialiased;
}

html, input {
  font-family:
    "HelveticaNeue-Light",
    "Helvetica Neue Light",
    "Helvetica Neue",
    Helvetica,
    Arial,
    "Lucida Grande",
    sans-serif;
}

html, body {
  height: 100%;
  margin: 0;
  padding: 0;
}

ul {
  list-style: none;
  word-wrap: break-word;
}

/* Pages */

.pages {
  height: 100%;
  margin: 0;
  padding: 0;
  width: 100%;
}

.page {
  height: 100%;
  position: absolute;
  width: 100%;
}

/* Login Page */

.login.page {
  background-color: #000;
}

.login.page .form {
  height: 100px;
  margin-top: -100px;
  position: absolute;

  text-align: center;
  top: 50%;
  width: 100%;
}

.login.page .form .usernameInput {
  background-color: transparent;
  border: none;
  border-bottom: 2px solid #fff;
  outline: none;
  padding-bottom: 15px;
  text-align: center;
  width: 400px;
}

.login.page .title {
  font-size: 4em;
}

.login.page .usernameInput {
  font-size: 4em;
  letter-spacing: 3px;
}

.login.page .title, .login.page .usernameInput {
  color: #fff;
  font-weight: 100;
}

/* Font */

.log {
  color: gray;
  font-size: 2em;
  margin: 1em;
  text-align: center;
}

/* Messages */

.chatArea {
  height: 67%;
  padding: 10px;
}

.messages {
  height: 100%;
  overflow-y: scroll;
  padding: 10px 20px 10px 20px;
  border-bottom: dashed;
  border-bottom-color: lightgray;
}

.emoji {
  background: none;
  border: none;
  margin-top: -1rem;
}

.message {
    font-size: 2.5em;
    margin-bottom: 1em;
    line-height: 1.1em;
}

.username {
  font-weight: 700;
  overflow: hidden;
  padding-right: 15px;
  text-align: right;
}

/* Input */

.inputarea {
  bottom: 0;
  left: 0;
  height: 25%;
  border: 3px;
  right: 0;
  width: 100%;
  position: fixed;
/*
  display: flex;
  flex-direction: row;
*/
}

.ui.raised.segment.inputMessage {
  font-size: 2.5em;
  border: 10px solid #000;
  width: 100%;
  outline: none;
  padding: 15px;
  resize:none;
  margin: 0.1em;
  font-family: Lato,'Helvetica Neue',Arial,Helvetica,sans-serif;
}

.center.row.btns{
    width: 100%;
    padding-top: 0;
}

.ui.button{
    font-size: 2.5em;
}
/* emoji list */

.ui.emojilist {
    font-size: 4em;
    text-align: center;
}

.ui.buton{
    font-size: 2em;
}

.emoji{
visibility: hidden;
}

.prevbtn{
    display: none;
}

.nextbtn{
    display: none;
}

.navbtn{
    font-size: 0.5em;
    border: none;
    margin-top: -1rem;
}

.sr-only {
  position: absolute;
  left: -10000px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}