#chat-widget.chat-hidden {
  display: none;
}

:root {
  --bg: #ffffff;
  --border: #e5e7eb;
  --text: #111827;
  --muted: #6b7280;
  --header: #111827;
  --headerText: #ffffff;
  --userBubble: #111827;
  --userText: #ffffff;
  --botBubble: #f3f4f6;
  --botText: #111827;
}

* { box-sizing: border-box; }

#chat-open {
  position: fixed;
  right: 20px;
  bottom: 20px;
  padding: 12px 14px;
  border: none;
  border-radius: 999px;
  background: var(--header);
  color: var(--headerText);
  cursor: pointer;
  font: 14px/1.1 Arial, sans-serif;
}

#chat-widget {
  position: fixed;
  right: 20px;
  bottom: 76px;
  width: 340px;
  height: 460px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 14px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  box-shadow: 0 20px 50px rgba(0,0,0,0.18);
}

.chat-hidden {
  display: none;
}

#chat-header {
  height: 52px;
  padding: 0 12px;
  background: var(--header);
  color: var(--headerText);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

#chat-title {
  font: 14px Arial, sans-serif;
  font-weight: 700;
  letter-spacing: 0.2px;
}

#chat-close {
  width: 34px;
  height: 34px;
  border: none;
  border-radius: 10px;
  background: rgba(255,255,255,0.12);
  color: var(--headerText);
  cursor: pointer;
  font: 22px/1 Arial, sans-serif;
}

#chat-messages {
  flex: 1;
  padding: 12px;
  overflow-y: auto;
  background: #fafafa;
}

.msg {
  display: flex;
  margin: 8px 0;
}

.msg.user { justify-content: flex-end; }
.msg.bot { justify-content: flex-start; }

.bubble {
  max-width: 78%;
  padding: 10px 12px;
  border-radius: 12px;
  font: 14px/1.35 Arial, sans-serif;
  color: var(--botText);
  background: var(--botBubble);
  white-space: pre-wrap;
}

.msg.user .bubble {
  background: var(--userBubble);
  color: var(--userText);
  border-bottom-right-radius: 6px;
}

.msg.bot .bubble {
  border-bottom-left-radius: 6px;
}

#chat-form {
  display: flex;
  gap: 8px;
  padding: 10px;
  border-top: 1px solid var(--border);
  background: var(--bg);
}

#user-input {
  flex: 1;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px 12px;
  font: 14px Arial, sans-serif;
  outline: none;
}

#user-input:focus {
  border-color: #c7c7c7;
}

#send-btn {
  padding: 10px 14px;
  border: none;
  border-radius: 10px;
  background: var(--header);
  color: var(--headerText);
  cursor: pointer;
  font: 14px Arial, sans-serif;
}