body {
  font-family: system-ui;
  margin: 0;
  padding: 0;
  background-color: #f2fff2;
  display: flex;
  flex-direction: column;
  height: 100vh;
}
.page-container {
  display: flex;
  flex-direction: column;
  height: 100vh;
}
.header {
  background-color: white;
  padding: 10px 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.logo h1 {
  color: #2b8a3e;
  font-size: 24px;
}
.font-toggle {
  font-size: 14px;
}
.chatbox {
  flex: 1;
  overflow-y: auto;
  padding: 15px;
  background: white;
}
.message {
  margin-bottom: 10px;
  padding: 10px;
  border-radius: 8px;
}
.message.user {
  background: #ccffcc;
  text-align: right;
}
.message.bot {
  background: #eeeeee;
}
.input-area {
  display: flex;
  padding: 10px;
  border-top: 1px solid #ccc;
  background: white;
}
.input-area input {
  flex: 1;
  padding: 10px;
  font-size: 16px;
}
.input-area button {
  padding: 10px 20px;
  background: green;
  color: white;
  border: none;
  font-size: 18px;
  margin-left: 10px;
}
.premium-section {
  padding: 15px;
  text-align: center;
  background: #fff;
  border-top: 1px solid #ddd;
}
.premium-section img {
  width: 150px;
  margin: 10px auto;
  display: block;
}