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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 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: 2.5em;
    margin-bottom: 10px;
}

.subtitle {
    font-size: 1.1em;
    opacity: 0.9;
}

.index-section {
    padding: 30px;
    background: #f8f9fa;
    border-bottom: 2px solid #e9ecef;
}

.index-section h3 {
    color: #333;
    margin-bottom: 15px;
    font-size: 1.3em;
}

.input-group {
    display: flex;
    gap: 10px;
    margin-bottom: 15px;
}

.doc-input {
    flex: 1;
    padding: 12px 15px;
    font-size: 1em;
    border: 2px solid #ddd;
    border-radius: 8px;
    transition: border-color 0.3s;
}

.doc-input:focus {
    outline: none;
    border-color: #667eea;
}

.btn {
    padding: 12px 25px;
    font-size: 1em;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.3s;
}

.btn-primary {
    background: #667eea;
    color: white;
}

.btn-primary:hover {
    background: #5568d3;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
}

.btn-primary:disabled {
    background: #ccc;
    cursor: not-allowed;
    transform: none;
}

.btn-secondary {
    background: #764ba2;
    color: white;
    min-width: 100px;
}

.btn-secondary:hover {
    background: #653a8e;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(118, 75, 162, 0.4);
}

.btn-tertiary {
    background: #28a745;
    color: white;
}

.btn-tertiary:hover {
    background: #218838;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(40, 167, 69, 0.4);
}

.btn-tertiary:disabled {
    background: #ccc;
    cursor: not-allowed;
    transform: none;
}

.button-group {
    display: flex;
    gap: 10px;
    margin-bottom: 15px;
    flex-wrap: wrap;
}

.info-box {
    background: #e7f3ff;
    border-left: 4px solid #667eea;
    padding: 15px;
    margin-bottom: 20px;
    border-radius: 6px;
}

.info-box p {
    margin: 0 0 10px 0;
    font-weight: 600;
    color: #333;
}

.info-box ol {
    margin: 0;
    padding-left: 20px;
    color: #555;
}

.info-box li {
    margin: 5px 0;
}

.documents-container {
    margin-top: 20px;
}

.docs-header {
    font-weight: 600;
    color: #667eea;
    margin-bottom: 10px;
    font-size: 1.1em;
}

.docs-list {
    list-style: none;
    padding: 0;
    background: white;
    border-radius: 8px;
    border: 1px solid #e9ecef;
}

.docs-list li {
    padding: 12px 15px;
    border-bottom: 1px solid #e9ecef;
}

.docs-list li:last-child {
    border-bottom: none;
}

.docs-list li strong {
    color: #333;
}

.docs-list li small {
    color: #666;
}

.loading {
    padding: 15px;
    text-align: center;
    color: #667eea;
    font-weight: 500;
}

.info {
    padding: 15px;
    background: #e7f3ff;
    border-radius: 6px;
    color: #004085;
}

.error {
    padding: 15px;
    background: #f8d7da;
    border-radius: 6px;
    color: #721c24;
}

.error strong {
    display: block;
    margin-bottom: 8px;
}

.error ul {
    margin: 10px 0 0 0;
    padding-left: 20px;
}

.error li {
    margin: 5px 0;
}

.warning-box {
    margin-top: 15px;
    padding: 12px;
    background: #fff3cd;
    border: 1px solid #ffc107;
    border-radius: 6px;
    color: #856404;
}

.warning-box strong {
    display: block;
    margin-bottom: 8px;
    color: #856404;
}

.warning-box ul {
    margin: 5px 0 0 0;
    padding-left: 20px;
}

.warning-box li {
    margin: 5px 0;
}

.status-message {
    margin-top: 10px;
    padding: 10px;
    border-radius: 6px;
    font-size: 0.95em;
}

.status-message .success {
    color: #155724;
    background-color: #d4edda;
    border: 1px solid #c3e6cb;
    display: block;
    padding: 10px;
    border-radius: 6px;
}

.status-message .error {
    color: #721c24;
    background-color: #f8d7da;
    border: 1px solid #f5c6cb;
    display: block;
    padding: 10px;
    border-radius: 6px;
}

.status-message .info {
    color: #004085;
    background-color: #cce5ff;
    border: 1px solid #b8daff;
    display: block;
    padding: 10px;
    border-radius: 6px;
}

.help-text {
    margin-top: 10px;
    font-size: 0.9em;
    color: #666;
    line-height: 1.6;
}

.help-text strong {
    color: #667eea;
}

.chat-section {
    padding: 30px;
}

.chat-section h3 {
    color: #333;
    margin-bottom: 15px;
    font-size: 1.3em;
}

.chat-container {
    background: #f8f9fa;
    border-radius: 12px;
    margin-bottom: 20px;
    height: 400px;
    overflow-y: auto;
    border: 2px solid #e9ecef;
}

.messages {
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.message {
    max-width: 80%;
    padding: 15px;
    border-radius: 12px;
    animation: fadeIn 0.3s ease-in;
    position: relative;
}

.copy-btn {
    position: absolute;
    top: 10px;
    right: 10px;
    background: #f0f0f0;
    border: 1px solid #ddd;
    border-radius: 6px;
    padding: 5px 10px;
    font-size: 0.85em;
    cursor: pointer;
    transition: all 0.2s;
    color: #333;
}

.copy-btn:hover {
    background: #667eea;
    color: white;
    border-color: #667eea;
    transform: translateY(-1px);
}

.copy-btn:active {
    transform: translateY(0);
}

.bot-message {
    padding-right: 100px; /* Make room for copy button */
}

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

.user-message {
    align-self: flex-end;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    margin-left: auto;
}

.bot-message {
    align-self: flex-start;
    background: white;
    border: 2px solid #e9ecef;
    color: #333;
}

.clarification-message {
    background: #fff3cd !important;
    border: 2px solid #ffc107 !important;
}

.clarification-message .message-content {
    color: #856404;
}

.clarification-message::before {
    content: "🤔 ";
    font-size: 1.2em;
}

.message-content {
    line-height: 1.6;
}

.sources {
    margin-top: 15px;
    padding-top: 15px;
    border-top: 1px solid #ddd;
    font-size: 0.9em;
    color: #666;
}

.sources strong {
    color: #667eea;
    display: block;
    margin-bottom: 8px;
}

.sources ul {
    list-style: none;
    padding-left: 0;
}

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

.sources li:before {
    content: "▸";
    position: absolute;
    left: 0;
    color: #667eea;
}

.input-area {
    display: flex;
    gap: 10px;
}

.question-input {
    flex: 1;
    padding: 12px 15px;
    font-size: 1em;
    border: 2px solid #ddd;
    border-radius: 8px;
    transition: border-color 0.3s;
}

.question-input:focus {
    outline: none;
    border-color: #764ba2;
}

.question-input:disabled {
    background: #f5f5f5;
    cursor: not-allowed;
}

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

.chat-container::-webkit-scrollbar-track {
    background: #f1f1f1;
    border-radius: 10px;
}

.chat-container::-webkit-scrollbar-thumb {
    background: #667eea;
    border-radius: 10px;
}

.chat-container::-webkit-scrollbar-thumb:hover {
    background: #5568d3;
}

/* Responsive design */
@media (max-width: 768px) {
    .container {
        margin: 0;
        border-radius: 0;
    }
    
    .header h1 {
        font-size: 1.8em;
    }
    
    .input-group {
        flex-direction: column;
    }
    
    .message {
        max-width: 90%;
    }
}