body {
  font-family: Arial, sans-serif;
  background: #f3f6fa;
  margin: 0;
  height: 100vh;
  width: 100vw;
  overflow: hidden;
}

@media (min-width: 769px) {
  body {
    display: flex;
    justify-content: center;
    align-items: center;
  }

  .chatbot-container {
    width: 650px;
    height: 580px;
    border-radius: 12px;
    box-shadow: 0 8px 20px rgba(0,0,0,0.15);
  }
}

@media (max-width: 700px) {
  body {
    display: block;
    width: 100vw;
    height: 100vh;
    margin: 0;
    padding: 0;
  }

  .chatbot-container {
    width: 100vw;
    height: 94vh; 
    border-radius: 0;
    box-shadow: none;
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    left: 0;
    padding-bottom: env(safe-area-inset-bottom);
    overflow: hidden;
  }

  .chat-header h2 {
    font-size: 20px;
  }

  .chat-body {
    font-size: 16px;
    padding: 12px;
    overflow-y: auto;
    flex: 1 1 auto;
    min-height: 0; 
  }

  #user-input {
    font-size: 16px;
    padding: 12px;
  }

  #send-btn {
    font-size: 16px;
    padding: 12px 16px;
  }

  .quick-options {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    padding: 10px;
    background: #f4f4f9;
    border-top: 1px solid #ddd;
    position: sticky;
    bottom: 0;
    left: 0;
    right: 0;
    max-height: 45vh;
    overflow-y: auto;
    flex-shrink: 0; 
  }

  .option-btn {
    flex: 1 1 48%;
    font-size: 16px;
    margin: 6px 1%;
    padding: 14px;
    white-space: normal;
    word-break: break-word;
    text-align: center;
    box-sizing: border-box;
  }
}

@supports (-webkit-touch-callout: none) {
  @media (max-width: 700px) {
    .chatbot-container {
      height: 88svh; 
      height: 88vh;  
    }
  }
}

.chatbot-container {
  background: #fff;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.chat-header {
  background: linear-gradient(135deg, #6366f1, #3b82f6);
  color: white;
  padding: 12px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.chat-header h2 {
  margin: 0;
  font-size: 16px;
}

.github-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  margin-left: auto;
}

.github-btn img {
  width: 26px;
  height: 26px;
  cursor: pointer;
  filter: invert(1);
  transition: transform 0.2s ease;
}

.github-btn img:hover {
  transform: scale(1.2);
}

.chat-body {
  flex: 1 1 auto;
  padding: 10px;
  overflow-y: auto;
  background: #fafafa;
  display: flex;
  flex-direction: column;
  min-height: 0;
}

.bot-msg {
  background: #e5edff;
  padding: 8px 12px;
  border-radius: 10px;
  margin: 4px 0;
  max-width: 90%;
  line-height: 1.4;
  display: inline-block;
  word-wrap: break-word;
  overflow-wrap: anywhere;
}

.user-msg {
  background: #d1fae5;
  padding: 8px 12px;
  border-radius: 10px;
  margin: 4px 0;
  max-width: 90%;
  align-self: flex-start;
  text-align: left;
  line-height: 1.4;
  display: inline-block;
  word-wrap: break-word;
  overflow-wrap: anywhere;
}

.thinking {
  font-style: italic;
  color: #666;
  background: #f3f4f6;
  animation: blink 1.2s infinite;
  align-self: flex-start;
  text-align: left;
  line-height: 1.3;
  display: inline-block;
}

@keyframes blink {
  0% { opacity: 0.4; }
  50% { opacity: 1; }
  100% { opacity: 0.4; }
}

.chat-footer {
  display: flex;
  padding: 10px;
  border-top: 1px solid #ddd;
  background: #f9f9f9;
}

#user-input {
  flex: 1;
  padding: 8px;
  border: 1px solid #ccc;
  border-radius: 8px;
}

#send-btn {
  margin-left: 6px;
  padding: 8px 12px;
  background: #6366f1;
  color: white;
  border: none;
  border-radius: 8px;
  cursor: pointer;
}

.quick-options {
  display: flex;
  flex-wrap: wrap;
  padding: 10px;
  background: #f4f4f9;
  border-top: 1px solid #ddd;
}

.option-btn {
  flex: 1 1 100%;
  background: #eef2ff;
  border: none;
  padding: 10px;
  margin: 6px 0;
  border-radius: 8px;
  cursor: pointer;
  transition: 0.2s;
  text-align: center;
  word-wrap: break-word;
  white-space: normal;
}

.option-btn:hover {
  background: #dbeafe;
}