:root {
    --primary-color: #0d6efd;
    --user-bg: #e7f3ff;
    --user-border: #0d6efd;
    --assistant-bg: #f8f9fa;
    --assistant-border: #dee2e6;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: #f5f5f5;
}

.navbar {
    box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
}

.chat-container {
    background-color: #ffffff;
    border: 1px solid #dee2e6;
    border-radius: 8px;
    box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
}

.message {
    padding: 12px 16px;
    border-radius: 6px;
    animation: slideIn 0.3s ease-in-out;
}

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

.user-message {
    background-color: var(--user-bg);
    border-left: 4px solid var(--user-border);
    margin-left: 20px;
}

.assistant-message {
    background-color: var(--assistant-bg);
    border-left: 4px solid var(--assistant-border);
    margin-right: 20px;
}

.message-header {
    font-weight: 600;
    font-size: 0.95rem;
    color: #495057;
}

.message-sender {
    color: #0d6efd;
}

.assistant-message .message-sender {
    color: #6c757d;
}

.message-content {
    font-size: 0.95rem;
    line-height: 1.6;
    color: #212529;
    word-wrap: break-word;
}

.message-content p {
    margin-bottom: 0.5rem;
}

.message-content p:last-child {
    margin-bottom: 0;
}

.message-content ul,
.message-content ol {
    margin-bottom: 0.5rem;
    margin-left: 1.5rem;
}

.message-content li {
    margin-bottom: 0.25rem;
}

.message-content code {
    background-color: #f8f9fa;
    border: 1px solid #dee2e6;
    border-radius: 4px;
    padding: 2px 6px;
    font-family: 'Monaco', 'Courier New', monospace;
    font-size: 0.85rem;
}

.message-content pre {
    background-color: #f8f9fa;
    border: 1px solid #dee2e6;
    border-radius: 6px;
    padding: 12px;
    overflow-x: auto;
    margin-bottom: 0.5rem;
}

.message-content pre code {
    background-color: transparent;
    border: none;
    padding: 0;
    color: #212529;
}

.message-content a {
    color: #0d6efd;
    text-decoration: none;
}

.message-content a:hover {
    text-decoration: underline;
}

.message-content blockquote {
    border-left: 4px solid #dee2e6;
    padding-left: 12px;
    margin-left: 0;
    color: #6c757d;
    font-style: italic;
}

.message-content strong {
    font-weight: 600;
    color: #212529;
}

.message-content em {
    font-style: italic;
}

.card {
    border: 1px solid #dee2e6;
    border-radius: 8px;
    box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
}

.btn-lg {
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
}

.form-control-lg {
    border-radius: 6px;
    border: 1px solid #dee2e6;
    font-size: 1rem;
}

.form-control-lg:focus {
    border-color: #0d6efd;
    box-shadow: 0 0 0 0.2rem rgba(13, 110, 253, 0.25);
}

.textarea-auto {
    resize: none;
    overflow: hidden;
    border-radius: 6px;
    border: 1px solid #dee2e6;
    font-size: 1rem;
    padding: 0.75rem;
    font-family: inherit;
    line-height: 1.5;
    min-height: 3rem;
    max-height: 150px;
    transition: border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
}

.textarea-auto:focus {
    border-color: #0d6efd;
    box-shadow: 0 0 0 0.2rem rgba(13, 110, 253, 0.25);
    outline: none;
}

.input-group {
    align-items: flex-end;
}

.btn-outline-secondary {
    border-color: #dee2e6;
    color: #6c757d;
    transition: all 0.2s ease;
}

.btn-outline-secondary:hover {
    background-color: #f8f9fa;
    border-color: #0d6efd;
    color: #0d6efd;
}

.sample-question {
    white-space: nowrap;
    font-size: 0.9rem;
}

footer {
    border-top: 1px solid #dee2e6;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .user-message {
        margin-left: 0;
    }

    .assistant-message {
        margin-right: 0;
    }

    .btn-lg {
        padding: 0.5rem 1rem;
        font-size: 0.9rem;
    }

    .form-control-lg {
        font-size: 0.95rem;
    }
}

/* Loading spinner animation */
.spinner-border-sm {
    width: 1rem;
    height: 1rem;
    border-width: 0.2em;
}