body {
  /* lock scrolling ? */
  display: grid;
  margin: 0;
  padding: 0;
  background: #f7f9fa;
  font-family: "Segoe UI", Arial, sans-serif;
  height: 100vh;
}

h1 {
  font-family: "Segoe UI", Arial, sans-serif;
  color: #3a3a3a;
  text-align: center;
  margin-top: 32px;
}
h2 {
  font-family: "Segoe UI", Arial, sans-serif;
  color: #3a3a3a;
  text-align: center;
  margin-top: 32px;
}

.top {
  grid-row: 1;
  padding-top: 2px;
  border-radius: 8px;
  margin-top: 0px;
  margin-left: 16px;
  margin-right: 16px;
  height: 60px;
  display: flex;
  justify-content: left;
  align-items: center;
}
.top input[type="text"] {
  padding: 0 8px;
  width: 80px;
}

.top button {
  height: 30px;
  border: none;
  background-color: #257a00;
  color: white;
  padding: 0 16px;
  border-radius: 4px;
  cursor: pointer;
}

.top button:hover {
  background-color: #34a300;
}
.right {
  margin-left: auto; /* push to the right */
  margin-right: 16px;
  color: #3a3a3a;
  display: flex;
  align-items: center; /* vertically center text and input */
  gap: 8px; /* space between text and input */
}
.top-menu {
  border-top: #3a3a3a 1px solid;
  grid-row: 2;
  padding: 5px;
  margin-left: 16px;
  margin-right: 16px;
  display: flex;
  justify-content: center; /* center links horizontally */
  align-items: center; /* vertically center links */
  gap: 16px; /* space between links */
}
.full-top {
  grid-row: 1;
  display: grid;
  background-color: #e1e1e1;
  grid-template-rows: auto auto;
}

.content-box {
  grid-row: 2;
  background-color: #c3c3c3;
  padding: 16px;
  border-radius: 8px;
  margin: 16px;
  height: calc(100vh - 250px);
  overflow-y: auto;
  overflow-x: hidden;
  white-space: normal;       /* allow wrapping */
  overflow-wrap: break-word;
}

.biglist {
  list-style-type: none;
  padding: 0;
  margin: 0;
  height: 100%;
  white-space: nowrap;
}

a.username {
  font-weight: bold;
  margin: 1px;
  white-space: nowrap;
}

a.message {
  color: #3a3a3a;
  white-space: normal;
  margin-bottom: 0;
}

p.timestamp {
  font-size: 0.8em;
  color: #777;
  margin: 0px;
  padding-bottom: 5px;
}

.user-box {
  grid-row: 3;
  background-color: #e1e1e1;
  padding: 16px;
  border-radius: 8px;
  margin: 16px;
  height: 35px;
}

.enter {
  height: 100%;
  border: none;
  float: right;
  background-color: #3a3a3a;
  color: white;
  padding: 0 16px;
  border-radius: 4px;
  cursor: pointer;
}

.user-box form {
  height: 100%;
  border: none;
  padding: 0px 0px;
}
.user-box form .text {
  height: 100%;
  width: calc(100% - 80px);
  border: none;
  padding: 0 8px; /* text padding */
  border-radius: 4px;
  box-sizing: border-box; /* is margin between text and send button */
}