body.chat-body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background: #f5f9ff;
  color: #222;
  margin: 0; padding: 0;
  overflow: hidden;
}

#leftdiv {
  background: white;
  border-radius: 8px;
  box-shadow: 0 0 8px rgba(0,0,0,0.1);
  padding: 15px;
  font-size: 15px;
  line-height: 1.5;
  overflow-y: auto;
}

#usersdiv {
  background: #e8f0fe;
  border-radius: 8px;
  box-shadow: 0 0 8px rgba(0,0,0,0.1);
  color: #555;
  font-size: 14px;
  padding: 15px;
  overflow-y: auto;
}

#bottomdiv {
  background: #336699;
  border-radius: 0 0 8px 8px;
  padding: 10px 20px;
  box-sizing: border-box;
  display: flex;
  align-items: center;
  gap: 10px;
}

#bottomdiv input[type=text] {
  flex-grow: 1;
  padding: 8px 12px;
  border: none;
  border-radius: 5px;
  font-size: 14px;
}

#bottomdiv select, #bottomdiv input[type=submit], #bottomdiv input[type=button] {
  padding: 8px 12px;
  border: none;
  border-radius: 5px;
  cursor: pointer;
  background-color: #5588bb;
  color: white;
  font-weight: 600;
  transition: background-color 0.3s ease;
}

#bottomdiv select:hover, #bottomdiv input[type=submit]:hover, #bottomdiv input[type=button]:hover {
  background-color: #2a4d7a;
}

.message {
  background: #f0f4ff;
  margin-bottom: 8px;
  padding: 8px 12px;
  border-radius: 10px;
  max-width: 70%;
  box-shadow: 1px 1px 3px rgba(0,0,0,0.1);
}

.message.own {
  background: #cfe2ff;
  margin-left: auto;
}

#topdiv {
  background: #336699;
  color: white;
  font-weight: bold;
  font-size: 18px;
  padding-left: 20px;
  line-height: 40px;
  box-shadow: 0 2px 5px rgba(0,0,0,0.15);
}