/* General Reset */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Poppins', sans-serif;
  background-color: #f5f5f5;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  background-image: linear-gradient(to right, #b2f7ef, #efffba);
}

.container {
  width: 600px;
  background-color: #ffffff;
  border-radius: 12px;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
  display: flex;
  flex-direction: column;
  height: 700px; /* Fixed height for the container */
  overflow: hidden;
}

/* Chat Header */
.chat-header {
  background-color: #81c784; /* Light green background */
  color: white;
  padding: 25px 20px;
  text-align: center;
  font-size: 1.8rem;
  font-weight: 600;
  margin-bottom: 20px; /* Added space below title */
}

/* Chat Window */
.chat-window {
  display: flex;
  flex-direction: column;
  flex-grow: 1;
  overflow: hidden; /* Prevent chat window from overflowing */
}

.chat-history {
  flex-grow: 1;
  padding: 20px;
  overflow-y: auto; /* Scroll when chat exceeds available space */
  background-color: #e8f5e9; /* Light green chat background */
  max-height: calc(100% - 65px); /* Ensures that the chat history fills the available space */
}

.message {
  margin-bottom: 15px;
  padding: 10px 15px;
  border-radius: 20px;
  font-size: 0.9rem;
  max-width: 70%;
  word-wrap: break-word;
}

.user-message {
  background-color: #c8e6c9; /* Light green bubble for user */
  color: #333;
  text-align: right;
  align-self: flex-end;
}

.model-message {
  background-color: #a5d6a7; /* Slightly darker green for model */
  color: #333;
  text-align: left;
  align-self: flex-start;
}

/* Input Area */
.input-area {
  display: flex;
  background-color: #ffffff;
  padding: 15px 10px;
  border-top: 1px solid #ccc;
  flex-shrink: 0; /* Prevents the input area from shrinking when the chat history grows */
}

input {
  flex-grow: 1;
  padding: 10px;
  border: 2px solid #81c784;
  border-radius: 25px;
  font-size: 1rem;
  outline: none;
  transition: all 0.2s ease;
  margin-right: 10px; /* Added space between input and button */
}

input:focus {
  border-color: #66bb6a;
  box-shadow: 0 0 5px rgba(102, 187, 106, 0.5);
}

.send-button {
  background-color: #66bb6a;
  color: white;
  border: none;
  border-radius: 25px;
  padding: 10px 20px;
  cursor: pointer;
  transition: background-color 0.3s;
}

.send-button:hover {
  background-color: #4caf50;
}

input::placeholder {
  color: #aaa;
}

/* Scrollbar Customization */
.chat-history::-webkit-scrollbar {
  width: 6px;
}

.chat-history::-webkit-scrollbar-thumb {
  background-color: #888;
  border-radius: 10px;
}

.chat-history::-webkit-scrollbar-track {
  background: transparent;
}

/* Media Queries for Responsiveness */
@media (min-width: 768px) {
  .container {
    width: 700px;
  }
}

@media (min-width: 1024px) {
  .container {
    width: 900px;
  }
}