body {
  margin: 0;
  background-color: #121212;
  color: white;
  font-family: 'Segoe UI', sans-serif;
  height: 100vh;
  display: flex;
  flex-direction: column;
}

#top-bar {
  background: #1a1a1a;
  padding: 12px 20px;
  font-size: 18px;
  font-weight: bold;
  border-bottom: 1px solid #333;
  position: relative;
}

#brand {
  cursor: pointer;
  position: relative;
  display: inline-block;
}

#dropdown-arrow {
  font-size: 14px;
  margin-left: 6px;
}

#model-dropdown {
  position: absolute;
  top: 38px;
  left: 0;
  background: #222;
  border: 1px solid #444;
  border-radius: 5px;
  overflow: hidden;
  width: 260px;
  z-index: 100;
}

.model-option {
  padding: 12px;
  cursor: pointer;
  border-bottom: 1px solid #333;
}

.model-option small {
  display: block;
  font-size: 12px;
  color: #aaa;
  margin-top: 4px;
}

.model-option.locked {
  color: gray;
  position: relative;
}

.subscribe-btn {
  background-color: #4a90e2;
  border: none;
  color: white;
  padding: 5px 10px;
  font-size: 13px;
  border-radius: 5px;
  margin-top: 6px;
  cursor: pointer;
}

.hidden {
  display: none;
}

#chat-section {
  display: flex;
  flex-direction: column;
  height: 100%;
}

#chatbox {
  flex: 1;
  padding: 20px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 15px;
}

.message {
  max-width: 80%;
  white-space: pre-wrap;
  line-height: 1.5;
}

.user {
  align-self: flex-end;
  background-color: #1f1f1f;
  padding: 10px 15px;
  border-radius: 10px;
}

.bot {
  align-self: flex-start;
  background-color: #2a2a2a;
  padding: 10px 15px;
  border-radius: 10px;
}

#input-area {
  display: flex;
  padding: 10px;
  background-color: #1a1a1a;
}

#userInput {
  flex: 1;
  padding: 12px;
  border: none;
  border-radius: 8px;
  font-size: 16px;
  background-color: #333;
  color: white;
}

#input-area button {
  margin-left: 10px;
  padding: 12px 16px;
  background-color: #4a90e2;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  color: white;
  font-size: 16px;
}

#typing {
  color: #888;
  padding: 0 20px 10px;
  font-size: 14px;
  display: none;
}

.dots::after {
  content: '...';
  animation: dots 1s infinite steps(3, end);
}

@keyframes dots {
  0% { content: '.'; }
  33% { content: '..'; }
  66% { content: '...'; }
}