* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: Arial, sans-serif;
}

body {
  background: url('https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcRxyAq8s3zbVPOX3snpoA8l2_QX1SMI1MyRcg&s') no-repeat center center fixed;
  background-size: cover;
  color: white;
}

.container {
  display: flex;
  height: 100vh;
}

header {
  position: absolute;
  top: 10px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 2rem;
  background: rgba(0, 0, 0, 0.5);
  padding: 10px 20px;
  border-radius: 20px;
}

.sidebar {
  width: 250px;
  background: rgba(0, 0, 0, 0.6);
  padding: 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.sidebar img {
  width: 100px;
  height: 100px;
  border-radius: 50%;
}

.sidebar button {
  background: url('https://cdn.pixabay.com/photo/2012/04/01/18/45/oval-23967_960_720.png') no-repeat center center;
  background-size: contain;
  width: 180px;
  height: 50px;
  border: none;
  margin-top: 10px;
  color: black;
  font-weight: bold;
  cursor: pointer;
}

.chat-area {
  flex: 1;
  display: flex;
  flex-direction: column;
  padding: 20px;
  background: rgba(0,0,0,0.5);
}

.messages {
  flex: 1;
  overflow-y: auto;
  margin-bottom: 10px;
}

.input-area {
  display: flex;
}

.input-area input {
  flex: 1;
  padding: 10px;
  border: none;
  border-radius: 8px;
}

.input-area button {
  padding: 10px 20px;
  margin-left: 10px;
  background-color: white;
  color: black;
  border-radius: 8px;
  cursor: pointer;
}

.modal {
  position: absolute;
  top: 100px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(255,255,255,0.9);
  color: black;
  padding: 20px;
  border-radius: 12px;
  display: none;
  flex-direction: column;
  gap: 10px;
}

.modal input {
  padding: 5px;
}

.hidden {
  display: none;
}