* {
margin: 0;
padding: 0;
box-sizing: border-box;
}

body {
font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
min-height: 100vh;
padding: 20px;
}

.container {
max-width: 900px;
margin: 0 auto;
background: white;
border-radius: 20px;
box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
overflow: hidden;
}

header {
background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
color: white;
padding: 30px;
text-align: center;
}

header h1 {
font-size: 2em;
margin-bottom: 10px;
}

.subtitle {
opacity: 0.9;
font-size: 0.95em;
}

.attribution {
margin-top: 10px;
font-size: 0.85em;
opacity: 0.8;
}

.attribution a {
color: #fff;
text-decoration: underline;
font-weight: 600;
}

.attribution a:hover {
opacity: 0.9;
}

.status-bar {
background: #f8f9fa;
border-bottom: 1px solid #e9ecef;
padding: 15px 30px;
}

.status-content {
display: flex;
align-items: center;
gap: 15px;
}

#statusText {
font-size: 0.9em;
color: #495057;
font-weight: 500;
}

.progress-container {
flex: 1;
height: 6px;
background: #e9ecef;
border-radius: 3px;
overflow: hidden;
}

.progress-bar {
height: 100%;
background: linear-gradient(90deg, #667eea, #764ba2);
width: 0%;
transition: width 0.3s ease;
}

.chat-container {
height: 500px;
display: flex;
flex-direction: column;
}

.messages {
flex: 1;
overflow-y: auto;
padding: 20px 30px;
display: flex;
flex-direction: column;
gap: 15px;
}

.message {
display: flex;
animation: slideIn 0.3s ease;
}

@keyframes slideIn {
from {
opacity: 0;
transform: translateY(10px);
}
to {
opacity: 1;
transform: translateY(0);
}
}

.message-content {
max-width: 80%;
padding: 15px 20px;
border-radius: 15px;
line-height: 1.5;
}

.message.user {
justify-content: flex-end;
}

.message.user .message-content {
background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
color: white;
}

.message.assistant .message-content {
background: #f8f9fa;
color: #212529;
}

.message-content strong {
display: block;
margin-bottom: 5px;
font-size: 0.85em;
opacity: 0.8;
}

.message-content p {
margin: 0;
white-space: pre-wrap;
word-wrap: break-word;
}

.typing-indicator {
display: inline-flex;
gap: 4px;
padding: 10px 0;
}

.typing-indicator span {
width: 8px;
height: 8px;
background: #667eea;
border-radius: 50%;
animation: bounce 1.4s infinite ease-in-out;
}

.typing-indicator span:nth-child(1) { animation-delay: -0.32s; }
.typing-indicator span:nth-child(2) { animation-delay: -0.16s; }

@keyframes bounce {
0%, 80%, 100% { transform: scale(0); }
40% { transform: scale(1); }
}

.input-container {
padding: 20px 30px;
border-top: 1px solid #e9ecef;
display: flex;
gap: 10px;
background: #f8f9fa;
}

#userInput {
flex: 1;
padding: 12px 15px;
border: 2px solid #e9ecef;
border-radius: 10px;
font-family: inherit;
font-size: 0.95em;
resize: none;
transition: border-color 0.3s ease;
}

#userInput:focus {
outline: none;
border-color: #667eea;
}

#userInput:disabled {
background: #e9ecef;
cursor: not-allowed;
}

button {
padding: 12px 24px;
background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
color: white;
border: none;
border-radius: 10px;
cursor: pointer;
font-weight: 600;
font-size: 0.95em;
display: flex;
align-items: center;
gap: 8px;
transition: transform 0.2s ease, opacity 0.2s ease;
}

button:hover:not(:disabled) {
transform: translateY(-2px);
opacity: 0.9;
}

button:active:not(:disabled) {
transform: translateY(0);
}

button:disabled {
opacity: 0.5;
cursor: not-allowed;
}

.clear-btn {
background: #dc3545;
padding: 12px 20px;
}

.info-panel {
background: #f8f9fa;
padding: 20px 30px;
border-top: 1px solid #e9ecef;
}

.info-panel h3 {
color: #495057;
margin-bottom: 10px;
font-size: 1em;
}

.info-panel ul {
list-style: none;
color: #6c757d;
font-size: 0.9em;
}

.info-panel li {
padding: 5px 0;
padding-left: 20px;
position: relative;
}

.info-panel li:before {
content: "→";
position: absolute;
left: 0;
color: #667eea;
}

/* Scrollbar styling */
.messages::-webkit-scrollbar {
width: 8px;
}

.messages::-webkit-scrollbar-track {
background: #f1f1f1;
}

.messages::-webkit-scrollbar-thumb {
background: #667eea;
border-radius: 4px;
}

.messages::-webkit-scrollbar-thumb:hover {
background: #764ba2;
}

/* Responsive design */
@media (max-width: 768px) {
body {
padding: 10px;
}

.container {
border-radius: 15px;
}

header {
padding: 20px;
}

header h1 {
font-size: 1.5em;
}

.chat-container {
height: 400px;
}

.messages {
padding: 15px;
}

.message-content {
max-width: 90%;
}

.input-container {
flex-direction: column;
padding: 15px;
}

button {
width: 100%;
justify-content: center;
}
}