* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: #1e1f22;
  color: #dcddde;
}

.hidden {
  display: none;
}

/* LOGIN */
.login-screen {
  height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
}

.login-box {
  background: #2b2d31;
  padding: 30px;
  border-radius: 10px;
  text-align: center;
  width: 280px;
}

.login-logo {
  width: 80px;
  margin-bottom: 15px;
}

.login-box input {
  width: 100%;
  padding: 10px;
  margin-bottom: 10px;
  border: none;
  border-radius: 5px;
}

.login-box button {
  width: 100%;
  padding: 10px;
  background: #5865f2;
  border: none;
  color: white;
  font-weight: bold;
  cursor: pointer;
}

/* APP */
.app {
  display: flex;
  height: 100vh;
}

/* SIDEBAR */
.sidebar {
  width: 220px;
  background: #2b2d31;
  padding: 10px;
}

.sidebar h2 {
  margin: 0 0 10px;
  font-size: 16px;
}

.sidebar ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.sidebar li {
  padding: 6px;
  font-size: 14px;
  color: #b5bac1;
}

/* CHAT */
.chat {
  flex: 1;
  display: flex;
  flex-direction: column;
}

.chat-header {
  background: #313338;
  padding: 12px;
  font-weight: bold;
  border-bottom: 1px solid #1e1f22;
}

.messages {
  flex: 1;
  padding: 15px;
  overflow-y: auto;
}

.message {
  margin-bottom: 10px;
}

.message span {
  color: #5865f2;
  font-weight: bold;
}

/* INPUT */
.input-area {
  display: flex;
  padding: 10px;
  background: #313338;
}

.input-area input {
  flex: 1;
  padding: 10px;
  border: none;
  border-radius: 5px;
}

.input-area button {
  margin-left: 10px;
  padding: 10px 16px;
  background: #5865f2;
  border: none;
  color: white;
  font-weight: bold;
  cursor: pointer;
}