chat1.css

body {
  font-family: sans-serif;
  background-color: #315481;
  background-image:
    radial-gradient(ellipse farthest-corner at 0 0, rgba(0,0,0,.2) 0%, rgba(62,45,177, .3) 50%,
    rgba(255,255,255,.3) 95%), linear-gradient(to bottom, #a7cbf9, #25da8e 100%);  background-attachment: fixed;

  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;

  padding: 0;
  margin: 0;

  font-size: 16px;
  line-height: 1.5;
}

.container {
  position: relative;
  max-width: 600px;
  margin: 0 auto;
  min-height: 100%;
  background: white;
}

header {
  background: #d2edf4;
  background-image: linear-gradient(to bottom, #d0edf5, #b4dbff 100%);
  padding: 20px 15px 15px 15px;
  line-height: 1;
}

footer {
  background: #d2edf4;
  background-image: linear-gradient(to tos, #d0edf5, #b4dbff 100%);
  position: absolute;
  bottom: 0;
  height: 85px;
  box-sizing: border-box;
  padding: 30px 15px 15px 15px;
  width: 100%;
}

#login-buttons {
  display: block;
}

h1 {
  font-size: 1.5em;
  margin: 0;
  margin-bottom: 10px;
  display: inline-block;
  margin-right: 1em;
}

form {
  margin-top: -10px;
  margin-bottom: 10px;
  position: relative;
}

.new-message input {
  box-sizing: border-box;
  padding: 8px 5px;
  width: 100%;
  padding-right: 80px;
  font-size: 1em;
}

.new-message input:focus{
  outline: 0;
}

.message-window {
  position: absolute;
  top: 80px;
  bottom: 70px;
  width: 100%;
  max-width: 600px;
  margin: 0;
  padding: 0;
  background: white;
  overflow: scroll;
}


.message {
  position: relative;
  list-style: none;
  padding: 15px;
  border-bottom: #eee solid 1px;
  background-color: transparent; 
}

.username {
  font-weight: bold;
}

.message-text{
  margin-top: 5px;
}

.more-messages {
  position: absolute;
  bottom: 6rem;
  left: 50%;
  width: 140px;
  height: 20px;
  margin-left: -70px;
  color: white;
  background-color: #ff5959;
  border-radius: 8px;
  border-style: none;
  opacity: .7;
  cursor: pointer;
}

.more-messages:focus {
  outline: none;
}

@media (max-width: 600px) {
  li {
    padding: 12px 15px;
  }

  .new-message input {
    padding-top: 15px;
  }
}