.relative { position: relative; }
.fixed { position: fixed; }
.inset-0 { top: 0; right: 0; bottom: 0; left: 0; }
.mx-auto { margin-left: auto; margin-right: auto; }
.mb-4 { margin-bottom: 1rem; }
.mb-6 { margin-bottom: 1.5rem; }
.gap-2 { gap: 0.5rem; }
.flex { display: flex; }
.h-full { height: 100%; }
.w-full { width: 100%; }
.w-11\/12 { width: 91.666667%; }
.max-w-md { max-width: 28rem; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-end { justify-content: flex-end; }
.overflow-y-auto { overflow-y: auto; }
.rounded-lg { border-radius: 0.5rem; }
.rounded-md { border-radius: 0.375rem; }
.border { border-width: 1px; }
.border-gray-300 { --tw-border-opacity: 1; border-color: rgb(209 213 219 / var(--tw-border-opacity)); }
.bg-white { --tw-bg-opacity: 1; background-color: rgb(255 255 255 / var(--tw-bg-opacity)); }
.bg-gray-600 { --tw-bg-opacity: 1; background-color: rgb(75 85 99 / var(--tw-bg-opacity)); }
.bg-blue-600 { background-color: #168AFE; }
.bg-opacity-50 { --tw-bg-opacity: 0.5; }
.p-8 { padding: 2rem; }
.p-3 { padding: 0.75rem; }
.px-6 { padding-left: 1.5rem; padding-right: 1.5rem; }
.py-2 { padding-top: 0.5rem; padding-bottom: 0.5rem; }
.text-sm { font-size: 0.875rem; line-height: 1.25rem; }
.text-lg { font-size: 1.125rem; line-height: 1.75rem; }
.text-2xl { font-size: 1.5rem; line-height: 2rem; }
.font-semibold { font-weight: 600; }
.font-medium { font-weight: 500; }
.text-white { --tw-text-opacity: 1; color: rgb(255 255 255 / var(--tw-text-opacity)); }
.shadow-xl { --tw-shadow: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1); --tw-shadow-colored: 0 20px 25px -5px var(--tw-shadow-color), 0 8px 10px -6px var(--tw-shadow-color); box-shadow: var(--tw-ring-offset-shadow, 0 0 #0000), var(--tw-ring-shadow, 0 0 #0000), var(--tw-shadow); }
.hover\:bg-blue-700:hover { background-color: #1275d4; }
.focus\:outline-none:focus { outline: 2px solid transparent; outline-offset: 2px; }
.focus\:ring-2:focus { --tw-ring-offset-shadow: var(--tw-ring-inset) 0 0 0 var(--tw-ring-offset-width) var(--tw-ring-offset-color); --tw-ring-shadow: var(--tw-ring-inset) 0 0 0 calc(2px + var(--tw-ring-offset-width)) var(--tw-ring-color); box-shadow: var(--tw-ring-offset-shadow, 0 0 #0000), var(--tw-ring-shadow, 0 0 #0000), var(--tw-shadow); }
.focus\:ring-blue-500:focus { --tw-ring-color: #168AFE; }
.focus\:ring-opacity-50:focus { --tw-ring-opacity: 0.5; }
:root {
  --background-primary: #ffffff;
  --background-secondary: #f1f3f4;
  --text-primary: #202124;
  --text-secondary: #5f6368;
  --border-color: #e0e0e0;
  --theme-toggle-icon-color: #5f6368;
  --accent-primary: linear-gradient(45deg, #168AFE, #FF6071);
  --user-message-background: #e7f1ff;
  --user-message-text: #001c3d;
  --code-bg: #f8f9fa;
  --code-text: #202124;
}
.dark-theme {
  --background-primary: #1e1f22;
  --background-secondary: #2d2f34;
  --text-primary: #e8eaed;
  --text-secondary: #bdc1c6;
  --border-color: #3c4043;
  --theme-toggle-icon-color: #bdc1c6;
  --accent-primary: linear-gradient(45deg, #168AFE, #FF6071);
  --user-message-background: #3a3048;
  --user-message-text: #e8eaed;
  --code-bg: #202124;
  --code-text: #e8eaed;
}
*, *::before, *::after { box-sizing: border-box; }
body {
  font-family: 'Inter', sans-serif;
  background-color: var(--background-secondary);
  color: var(--text-primary);
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  margin: 0;
  transition: background-color 0.3s, color 0.3s;
}
.chat-container {
  width: 100%;
  max-width: 800px;
  height: 90vh;
  display: flex;
  flex-direction: column;
  background-color: var(--background-primary);
  border-radius: 1.5rem;
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.1);
  overflow: hidden;
  margin: 1rem;
  border: 1px solid var(--border-color);
  transition: background-color 0.3s, border-color 0.3s;
}
.chat-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background-color: var(--background-secondary);
  padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--border-color);
  transition: background-color 0.3s, border-color 0.3s;
  position: relative;
  z-index: 10;
}
.chat-header h1 { color: var(--text-primary); }
.chat-messages {
  flex-grow: 1;
  padding: 1.5rem;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  scrollbar-width: thin;
  scrollbar-color: var(--text-secondary) var(--background-secondary);
}
.chat-messages::-webkit-scrollbar { width: 8px; }
.chat-messages::-webkit-scrollbar-track { background: var(--background-secondary); border-radius: 10px; }
.chat-messages::-webkit-scrollbar-thumb { background-color: var(--text-secondary); border-radius: 10px; border: 2px solid var(--background-secondary); }
.chat-messages::-webkit-scrollbar-thumb:hover { background-color: var(--text-primary); }
.chat-input-area {
  display: flex;
  flex-direction: column;
  padding: 1rem 1.5rem;
  border-top: 1px solid var(--border-color);
  background-color: var(--background-primary);
  transition: background-color 0.3s, border-color 0.3s;
}
.message-bubble { 
  max-width: 95%; 
  word-wrap: break-word; 
  line-height: 1.6; 
  transition: background-color 0.3s, color 0.3s; 
  display: flex; 
  flex-direction: column; 
  position: relative;
}
.message-content { padding: 0.75rem 1.25rem; border-radius: 1.25rem; }
.user-message { align-self: flex-end; }
.user-message .message-content { background-color: var(--user-message-background); color: var(--user-message-text); border-bottom-right-radius: 0.25rem; }
.ai-message { align-self: flex-start; max-width: 95%; }
.ai-message .message-content { background-color: var(--background-secondary); color: var(--text-primary); padding: 0.75rem 1.25rem; border-radius: 1.25rem; border-bottom-left-radius: 0.25rem; }
.ai-message .message-content p { margin-bottom: 0.5em; }
.ai-message .message-content p:last-child { margin-bottom: 0; }
.ai-message .message-content ul, .ai-message .message-content ol { padding-left: 1.5rem; margin-top: 0.5em; margin-bottom: 0.5em; }
.ai-message .message-content blockquote { border-left: 4px solid var(--border-color); padding-left: 1rem; margin: 0.5em 0; color: var(--text-secondary); }
.chat-input-main { display: flex; align-items: center; width: 100%; }
.chat-input-wrapper { flex-grow: 1; position: relative; display: flex; flex-direction: column; }
.chat-input { flex-grow: 1; padding: 0.8rem 1.25rem; border: 1px solid var(--border-color); border-radius: 1rem; outline: none; font-size: 1rem; background-color: var(--background-secondary); color: var(--text-primary); transition: all 0.2s ease-in-out; resize: none; overflow-y: auto; min-height: calc(1rem * 1.6 + 0.8rem * 2 + 2px); line-height: 1.6; padding-right: 3.5rem; }
.chat-input::-webkit-scrollbar { width: 8px; }
.chat-input::-webkit-scrollbar-track { background: var(--background-secondary); border-radius: 10px; margin: 5px 0; }
.chat-input::-webkit-scrollbar-thumb { background-color: var(--text-secondary); border-radius: 10px; border: 2px solid var(--background-secondary); }
.chat-input::-webkit-scrollbar-thumb:hover { background-color: var(--text-primary); }
.chat-input:focus { border-color: #168AFE; box-shadow: 0 0 0 3px rgba(22, 138, 254, 0.2); }
.chat-input-wrapper-error .chat-input { border-color: #e53e3e; box-shadow: 0 0 0 3px rgba(229, 62, 62, 0.2); }
.char-counter { position: absolute; bottom: 0.6rem; right: 1rem; font-size: 0.75rem; color: var(--text-secondary); pointer-events: none; }
.char-counter.error { color: #e53e3e; }
.dark-theme .char-counter.error { color: #f87171; }
.input-error-message { display: flex; align-items: center; gap: 0.4rem; color: #e53e3e; font-size: 0.875rem; padding-top: 0.75rem; width: 100%; }
.input-error-message::before { content: ''; display: inline-block; flex-shrink: 0; width: 16px; height: 16px; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%23e53e3e'%3E%3Cpath d='M12 2C6.48 2 2 6.48 2 12s4.48 10 10 10 10-4.48 10-10S17.52 2 12 2zm5 13.59L15.59 17 12 13.41 8.41 17 7 15.59 10.59 12 7 8.41 8.41 7 12 10.59 15.59 7 17 8.41 13.41 12 17 15.59z'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-size: contain; margin-right: 0.1rem; }
.dark-theme .input-error-message { color: #f87171; }
.dark-theme .input-error-message::before { background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%23f87171'%3E%3Cpath d='M12 2C6.48 2 2 6.48 2 12s4.48 10 10 10 10-4.48 10-10S17.52 2 12 2zm5 13.59L15.59 17 12 13.41 8.41 17 7 15.59 10.59 12 7 8.41 8.41 7 12 10.59 15.59 7 17 8.41 13.41 12 17 15.59z'/%3E%3C/svg%3E"); }
.theme-toggle-button { background: none; border: none; cursor: pointer; padding: 0.5rem; color: var(--theme-toggle-icon-color); display: flex; align-items: center; justify-content: center; }
.theme-toggle-button:hover { opacity: 0.7; }
.send-button { margin-left: 0.75rem; padding: 0.6rem; background: var(--accent-primary); color: white; border: none; border-radius: 50%; cursor: pointer; transition: opacity 0.2s, transform 0.1s, background 0.3s; display: flex; align-items: center; justify-content: center; }
.send-button:hover { opacity: 0.85; }
.send-button:active { transform: scale(0.95); }
.send-button:disabled { background: #a0aec0; cursor: not-allowed; }
.dark-theme .send-button:disabled { background: #4a5568; }
.copy-code-button { position: absolute; top: 0.5em; right: 0.5em; background-color: var(--background-primary); border: 1px solid var(--border-color); color: var(--text-secondary); padding: 0.3rem 0.6rem; border-radius: 0.5rem; cursor: pointer; opacity: 0; transition: opacity 0.2s, background-color 0.2s, color 0.2s; display: flex; align-items: center; gap: 0.4rem; font-size: 0.8rem; z-index: 1; }
.ai-message pre:hover .copy-code-button { opacity: 1; }
.copy-code-button:hover { background-color: #e2e8f0; }
.dark-theme .copy-code-button:hover { background-color: #4a5568; }
.copy-code-button:active { transform: scale(0.95); }
.ai-message pre { background-color: var(--code-bg); color: var(--code-text); border: 1px solid var(--border-color); padding: 1.5em 1em 1em 1em; border-radius: 0.75rem; overflow-x: auto; font-family: 'Fira Code', 'Courier New', Courier, monospace; font-size: 0.9em; line-height: 1.6; position: relative; margin: 0.5em 0; }
.dark-theme .hljs { background: var(--code-bg); color: var(--code-text); }
.hljs { background: var(--code-bg); color: var(--code-text); }
.streaming-cursor { font-weight: 600; }
.modal-content-box { background-color: white; padding: 2rem; border-radius: 0.5rem; box-shadow: 0 20px 25px -5px rgba(0,0,0,.1), 0 10px 10px -5px rgba(0,0,0,.04); width: 91.666667%; max-width: 28rem; margin: auto; position: relative; pointer-events: auto; transition: background-color 0.3s; }
.modal-content-box h2 { color: #1f2937; }
.modal-content-box p { color: #4b5563; }
.modal-content-box a { color: #168AFE; transition: color 0.2s; }
.modal-content-box a:hover { text-decoration: underline; color: #1275d4; }
.modal-close-button { position: absolute; top: 0.75rem; right: 0.75rem; background: transparent; border: none; padding: 0.5rem; cursor: pointer; color: #6b7280; border-radius: 50%; transition: background-color 0.2s, color 0.2s; line-height: 0; }
.modal-close-button:hover { background-color: #f3f4f6; color: #1f2937; }
.modal-close-button svg { width: 1.25rem; height: 1.25rem; }
.dark-theme .modal-content-box { background-color: var(--background-secondary); }
.dark-theme .modal-content-box h2 { color: var(--text-primary); }
.dark-theme .modal-content-box p { color: var(--text-secondary); }
.dark-theme .modal-content-box a { color: #FF6071; }
.dark-theme .modal-content-box a:hover { color: #ff7c8d; }
.dark-theme .modal-content-box input[type="password"] { background-color: var(--background-primary); color: var(--text-primary); border-color: #4b5563; }
.dark-theme .modal-content-box input[type="password"]::placeholder { color: #9ca3af; }
.dark-theme .modal-close-button { color: #9ca3af; }
.dark-theme .modal-close-button:hover { background-color: #374151; color: #f3f4f6; }
.dark-theme .modal-content-box #saveApiKeyButton { background-color: #168AFE; }
.dark-theme .modal-content-box #saveApiKeyButton:hover { background-color: #1275d4; }
.typing-indicator { display: flex; align-items: center; padding: 0.75rem 1.25rem; }
.typing-indicator .typing-dot { width: 8px; height: 8px; margin: 0 2px; background-color: var(--text-secondary); border-radius: 50%; animation: typing-bounce 1.4s infinite both; }
.typing-indicator .typing-dot:nth-child(1) { animation-delay: -0.4s; } 
.typing-indicator .typing-dot:nth-child(2) { animation-delay: -0.2s; } 
@keyframes typing-bounce { 0%, 80%, 100% { transform: scale(0); } 40% { transform: scale(1.0); } }
.settings-menu { position: relative; }
.dropdown-menu { position: absolute; top: calc(100% + 0.5rem); right: 0; background-color: var(--background-primary); border: 1px solid var(--border-color); border-radius: 0.75rem; box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1); width: 220px; z-index: 100; overflow: hidden; display: flex; flex-direction: column; transition: opacity 0.2s ease-in-out, transform 0.2s ease-in-out; }
.dropdown-menu.hidden { opacity: 0; transform: translateY(-10px); pointer-events: none; }
.dropdown-menu button { display: flex; align-items: center; gap: 0.75rem; width: 100%; padding: 0.75rem 1rem; background: none; border: none; border-bottom: 1px solid var(--border-color); text-align: left; cursor: pointer; font-size: 0.9rem; color: var(--text-primary); transition: background-color 0.2s; }
.dropdown-menu button:last-child { border-bottom: none; }
.dropdown-menu button:hover { background-color: var(--background-secondary); }
.dropdown-menu .icon-container { color: var(--text-secondary); font-style: normal; width: 20px; height: 20px; display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
.hidden { display: none !important; }
.copy-message-button {
  position: absolute;
  top: 0.5em;
  right: 0.5em;
  background-color: var(--background-primary);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  padding: 0.2rem 0.5rem;
  border-radius: 0.5rem;
  cursor: pointer;
  opacity: 0;
  transition: opacity 0.2s, background-color 0.2s;
  z-index: 5;
  line-height: 0;
}
.ai-message:hover .copy-message-button {
  opacity: 1;
}
.copy-message-button:hover {
  background-color: var(--background-secondary);
}
@media (max-width: 768px) {
  body { overflow: hidden; }
  .chat-container { height: 100vh; max-height: 100vh; margin: 0; border-radius: 0; border: none; box-shadow: none; }
  .chat-header { padding: 0.75rem 1rem; }
  .chat-messages { padding: 1rem; }
  .chat-input-area { padding: 0.75rem 1rem; }
}