body {
  font-family: "Segoe UI", sans-serif;
  background: linear-gradient(135deg, #8789b8, #5659ad);
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  margin: 0;
  transition: background 0.3s ease, color 0.3s ease;
}


.container {
  width: 400px;
  background: white;
  padding: 20px;
  border-radius: 16px;
  box-shadow: 0 12px 24px rgba(0, 0, 0, 0.15);
  text-align: center;
  display: flex;
  flex-direction: column;
  transition: transform 0.2s ease, background 0.3s ease;
}

h1 {
  margin-bottom: 16px;
  color: #3A3B93;
}

.chat-window {
  flex: 1;
  height: 250px;
  background: linear-gradient(145deg, #b6b7df, #b6b7df);
  border: 1px solid #ddd;
  border-radius: 12px;
  padding: 10px;
  margin-bottom: 10px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
}

.message {
  max-width: 80%;
  margin: 5px 0;
  padding: 8px 12px;
  border-radius: 12px;
  font-size: 14px;
  word-wrap: break-word;
  transition: all 0.2s ease;
}

.message.encrypted {
  background: #3A3B93;
  color: white;
  align-self: flex-end;
  box-shadow: 0 2px 6px rgba(125, 91, 166, 0.4);
}

.message.decrypted {
  background: #f8f5fa;
  color: #333;
  align-self: flex-start;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.1);
}

textarea, input {
  width: 100%;
  margin: 8px 0;
  border: 1px solid #ddd;
  border-radius: 8px;
  font-size: 14px;
  resize: none;
}

textarea {
  height: 60px;
  background: #f9f5fc;
}

.buttons {
  display: flex;
  justify-content: space-between;
}

button {
  flex: 1;
  margin: 5px;
  padding: 10px;
  background: linear-gradient(135deg, #5e61af, #3A3B93);
  color: white;
  border: none;
  border-radius: 8px;
  font-size: 14px;
  cursor: pointer;
  transition: background 0.2s ease, transform 0.2s ease;
}

button:hover {
  background: linear-gradient(135deg, #484cb6, #121370);
  transform: translateY(-2px);
}