:root {
  --bg: #f1f1f1;
  --fg: #000;
  --bubble-user: #007aff;
  --bubble-assistant: #e5e5ea;
  --input-bg: #fff;
}

[data-theme="dark"] {
  --bg: #1e1e1e;
  --fg: #fff;
  --bubble-user: #0a84ff;
  --bubble-assistant: #2c2c2e;
  --input-bg: #2a2a2a;
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  width: 100%;
  font-family: 'Calibri', 'Nokora', system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  background: var(--bg);
  color: var(--fg);
}


.chat-container {
  display: flex;
  flex-direction: column;
  height: 100vh;
  width: 100vw;
  background: var(--input-bg);
}

header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 16px;
  border-bottom: 1px solid #ccc;
  background: var(--input-bg);
}

.chat-window {
  flex: 1;
  padding: 16px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
  scroll-behavior: smooth;
}

.message {
  max-width: 80%;
  padding: 12px 16px;
  border-radius: 18px;
  line-height: 1.6;
  font-size: 1rem;
  overflow-wrap: break-word;
  white-space: pre-wrap;
}

.message.user {
  align-self: flex-end;
  background: var(--bubble-user);
  color: white;
  border-bottom-right-radius: 4px;
}

.message.assistant {
  align-self: flex-start;
  background: var(--bubble-assistant);
  color: var(--fg);
  border-bottom-left-radius: 4px;
}

.message.typing::after {
  content: '⏳';
  animation: blink 1s infinite;
}

@keyframes blink {
  0%, 100% { opacity: 0.2; }
  50% { opacity: 1; }
}

.chat-input {
  display: flex;
  padding: 12px;
  border-top: 1px solid #ddd;
  background: var(--input-bg);
}

.chat-input input {
  flex: 1;
  padding: 10px 14px;
  border: 1px solid #ccc;
  border-radius: 999px;
  outline: none;
  font-size: 1rem;
  background: var(--bg);
  color: var(--fg);
}

.chat-input button {
  margin-left: 8px;
  padding: 10px 16px;
  background: var(--bubble-user);
  color: white;
  border: none;
  border-radius: 999px;
  cursor: pointer;
}

/* ✅ Copy Button Styling */
.copy-btn {
  margin-top: 8px;
  padding: 6px 12px;
  font-size: 0.85rem;
  background: transparent;
  color: var(--fg);
  border: 1px solid #ccc;
  border-radius: 8px;
  cursor: pointer;
  transition: background 0.2s, color 0.2s;
}

.copy-btn:hover {
  background: var(--bubble-user);
  color: white;
  border-color: var(--bubble-user);
}
/* ✅ Font inheritance for key UI elements */
.message,
.message-content,
.chat-input input,
.chat-input button,
.copy-btn,
header h1 {
  font-family: inherit;
  font-size: 1rem;
}