body {
  display: flex;
  flex-direction: column;
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
}

header {
  display: flex;
  justify-content: space-between;
  padding: 10px;
  background-color: #f1f1f1;
}

header .logo {
  height: 40px;
}

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

header .profile-pic {
  border-radius: 50%;
  height: 40px;
  width: 40px;
  margin-right: 10px;
}

header .notification-icon {
  height: 24px;
}

.container {
  display: flex;
}

aside {
  width: 200px;
  background-color: #f1f1f1;
  padding: 10px;
}

aside nav ul {
  list-style: none;
  padding: 0;
}

aside nav ul li {
  margin-bottom: 10px;
}

aside nav ul li a {
  text-decoration: none;
  color: #333;
}

main {
  flex: 1;
  display: flex;
  flex-direction: column;
}

#chat-list {
  width: 300px;
  padding: 10px;
  background-color: #fff;
  border-right: 1px solid #ddd;
}

#chat-content {
  flex: 1;
  padding: 10px;
  background-color: #fff;
}

.message-input {
  display: flex;
  justify-content: space-between;
  padding-top: 10px;
}

footer {
  display: flex;
  justify-content: space-between;
  padding: 10px;
  background-color: #f1f1f1;
}

.chat-item a {
  display: flex;
  align-items: center;
  text-decoration: none;
  color: inherit;
}

.chat-item a:hover {
  background-color: #f0f0f0;
}

.chat-item img.contact-pic {
  border-radius: 50%;
  height: 50px;
  width: 50px;
  margin-right: 10px;
}

.chat-item .chat-info {
  flex: 1;
}

.chat-item .contact-name {
  font-weight: bold;
}

.chat-item .last-message {
  color: #888;
}