:root {
    --primary-color: #6a0dad;
    --primary-light: #9c27b0;
    --text-color: #000000;
    --light-text: #777;
    --bg-color: #ffffff;
    --input-bg: #f3e5f5;
    --sidebar-bg: #f8f9fa;
    --border-color: #e0e0e0;
    --error-color: #f44336;
    --success-color: #4caf50;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, 
                Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
}

html, body {
    height: 100%;
    overflow-x: hidden;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
}

.app-wrapper {
    display: flex;
    flex-direction: column;
    height: 100vh;
    overflow: hidden;
}

.container {
    display: flex;
    height: calc(100vh - 60px);
    overflow: hidden;
}

/* Header */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    background-color: var(--bg-color);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

.header h1 {
    font-size: 1.25rem;
    color: var(--primary-color);
    font-weight: 600;
}

.header button {
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.header button:hover {
    background-color: rgba(106, 13, 173, 0.1);
}

/* Sidebar */
.sidebar {
    width: 240px;
    background-color: var(--sidebar-bg);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    transition: transform 0.3s ease;
    overflow: hidden;
    z-index: 99;
    position: fixed;
    top: 60px;
    bottom: 0;
    left: 0;
    transform: translateX(-100%);
}

.sidebar.open {
    transform: translateX(0);
}

.sidebar-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.sidebar-header h3 {
    color: var(--primary-color);
    font-size: 0.95rem;
    font-weight: 600;
}

.clear-history-btn {
    background: none;
    border: none;
    color: var(--primary-color);
    cursor: pointer;
    font-size: 0.85rem;
    padding: 0.25rem 0.5rem;
    border-radius: 0.25rem;
}

.clear-history-btn:hover {
    background-color: rgba(106, 13, 173, 0.1);
}

.history-list {
    list-style: none;
    overflow-y: auto;
    flex: 1;
    padding: 0.5rem;
}

.history-list li {
    position: relative;
    padding: 0.75rem;
    cursor: pointer;
    border-radius: 0.5rem;
    margin-bottom: 0.25rem;
    font-size: 0.9rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    transition: background-color 0.2s;
}

.history-list li:hover {
    background-color: rgba(106, 13, 173, 0.1);
}

.history-list li.active {
    background-color: rgba(106, 13, 173, 0.15);
    font-weight: 500;
}

.history-list li.empty {
    cursor: default;
    color: var(--light-text);
    text-align: center;
    font-style: italic;
}

.history-list li.empty:hover {
    background-color: transparent;
}

/* Main Content */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    height: 100%;
    position: relative;
    margin-left: 0;
}

.welcome-screen {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    flex: 1;
    text-align: center;
    padding: 2rem;
    padding-bottom: 120px;
}

.logo {
    margin-bottom: 1.5rem;
    opacity: 0.9;
    width: 120px;
    height: 120px;
}

.welcome-title {
    color: var(--primary-color);
    font-weight: bold;
    margin-bottom: 0.5rem;
    font-size: 1.8rem;
}

.welcome-subtitle {
    color: var(--primary-color);
    font-size: 1.1rem;
    opacity: 0.8;
}

/* Chat Container */
.chat-container {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    padding: 1rem;
    padding-bottom: 120px;
    display: none;
    scroll-behavior: smooth;
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
}

/* Messages */
.message {
    max-width: min(800px, calc(100vw - 2rem));
    margin: 0 auto 1.25rem;
    padding: 1rem 1.25rem;
    line-height: 1.6;
    word-wrap: break-word;
    overflow-wrap: break-word;
    animation: fadeIn 0.3s ease;
    box-sizing: border-box;
}

.user-message {
    background-color: var(--primary-color);
    color: white;
    margin-left: auto;
    border-radius: 1rem;
    border-bottom-right-radius: 0.25rem;
}

.ai-message-container {
    width: 100%;
    max-width: 100%;
    padding: 1rem 0;
    background-color: var(--bg-color);
    overflow-x: hidden;
}

.ai-message {
    background-color: var(--bg-color);
    width: 100%;
    max-width: 100%;
}

.ai-message-content {
    max-width: min(800px, calc(100vw - 2rem));
    margin: 0 auto;
    color: var(--text-color);
    word-break: break-word;
    padding: 0 1.25rem;
    box-sizing: border-box;
    overflow-x: hidden;
}

.ai-message-content > *:first-child {
    margin-top: 0;
}

.ai-message-content > *:last-child {
    margin-bottom: 0;
}

/* Markdown Styling */
.markdown-body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
    font-size: 16px;
    line-height: 1.5;
    word-wrap: break-word;
    overflow-wrap: break-word;
    color: var(--text-color) !important;
    background-color: var(--bg-color) !important;
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
}

.markdown-body * {
    max-width: 100%;
    box-sizing: border-box;
}

.markdown-body h1,
.markdown-body h2,
.markdown-body h3,
.markdown-body h4,
.markdown-body h5,
.markdown-body h6 {
    color: var(--text-color) !important;
    margin: 1.5rem 0 1rem 0;
    font-weight: bold;
    word-wrap: break-word;
    overflow-wrap: break-word;
}

.markdown-body p {
    margin-bottom: 1rem;
    word-wrap: break-word;
    overflow-wrap: break-word;
}

.markdown-body ul,
.markdown-body ol {
    padding-left: 2rem;
    margin-bottom: 1rem;
    word-wrap: break-word;
    overflow-wrap: break-word;
}

.markdown-body li {
    margin-bottom: 0.5rem;
    word-wrap: break-word;
    overflow-wrap: break-word;
}

.markdown-body blockquote {
    border-left: 4px solid var(--primary-color);
    padding-left: 1rem;
    color: var(--light-text);
    margin-bottom: 1rem;
    word-wrap: break-word;
    overflow-wrap: break-word;
}

.markdown-body pre {
    background: #f6f8fa;
    padding: 1rem;
    border-radius: 6px;
    overflow-x: auto;
    margin-bottom: 1rem;
    border: 1px solid #d0d7de;
    max-width: 100%;
    box-sizing: border-box;
}

.markdown-body code {
    background: rgba(135, 131, 120, 0.15);
    padding: 0.2em 0.4em;
    border-radius: 4px;
    font-family: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
    font-size: 0.95rem;
    word-break: break-all;
    white-space: pre-wrap;
}

.markdown-body pre code {
    background: none;
    padding: 0;
    white-space: pre-wrap;
    word-break: break-all;
}

.markdown-body table {
    width: 100%;
    max-width: 100%;
    border-collapse: collapse;
    margin: 1rem 0;
    border: 1px solid var(--text-color);
    display: block;
    overflow-x: auto;
    white-space: nowrap;
}

.markdown-body table table {
    display: table;
}

.markdown-body th,
.markdown-body td {
    padding: 8px 12px;
    text-align: left;
    border: 1px solid var(--text-color);
    word-wrap: break-word;
    overflow-wrap: break-word;
    white-space: normal;
}

.markdown-body th {
    font-weight: bold;
}

/* Enhanced Footer Styling */
.document-footer {
    font-size: 0.85rem !important;
    color: #666666 !important;
    margin-top: 2rem !important;
    padding-top: 1rem !important;
    border-top: 1px solid #e1e1e1 !important;
    text-align: center !important;
    display: block !important;
    visibility: visible !important;
    opacity: 1 !important;
    clear: both !important;
    width: 100% !important;
    box-sizing: border-box !important;
}

.document-footer strong {
    font-weight: 600 !important;
    color: #333333 !important;
}

/* Force footer visibility in all contexts */
footer,
footer .document-footer,
.ai-message-content .document-footer,
.markdown-body .document-footer {
    font-size: 0.85rem !important;
    color: #666666 !important;
    margin-top: 2rem !important;
    padding-top: 1rem !important;
    border-top: 1px solid #e1e1e1 !important;
    text-align: center !important;
    display: block !important;
    visibility: visible !important;
    opacity: 1 !important;
    clear: both !important;
    width: 100% !important;
    box-sizing: border-box !important;
}

footer strong,
footer .document-footer strong,
.ai-message-content .document-footer strong,
.markdown-body .document-footer strong {
    font-weight: 600 !important;
    color: #333333 !important;
}

/* Main Content Styles */
.ai-message-container {
    background-color: #ffffff !important;
    color: #000000 !important;
}

.ai-message-content {
    color: #000000 !important;
    background-color: #ffffff !important;
}

.markdown-body {
    color: #000000 !important;
    background-color: #ffffff !important;
}

/* Headings */
.markdown-body h1,
.markdown-body h2,
.markdown-body h3,
.markdown-body h4,
.markdown-body h5,
.markdown-body h6 {
    color: #000000 !important;
    font-weight: bold !important;
}

/* Download Button */
.download-pdf-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin: 2rem auto;
    padding: 0.75rem 1.5rem;
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    cursor: pointer;
    transition: all 0.2s;
    font-size: 0.9rem;
    width: fit-content;
    color: #000000;
}

.download-pdf-btn:hover {
    background: #f0f0f0;
}

.download-pdf-btn .btn-text {
    color: #000000;
}

.download-pdf-btn .download-icon path {
    stroke: #000000;
}

.download-pdf-btn:active {
    background: #e0e0e0;
}

.download-pdf-btn:active .download-icon path {
    stroke: white;
}

.download-pdf-btn.loading {
    opacity: 0.7;
    pointer-events: none;
}

.download-pdf-btn .spinner {
    width: 16px;
    height: 16px;
    border: 2px solid rgba(106, 13, 173, 0.3);
    border-radius: 50%;
    border-top-color: var(--primary-color);
    animation: spin 1s linear infinite;
    display: none;
}

.download-pdf-btn.loading .download-icon {
    display: none;
}

.download-pdf-btn.loading .spinner {
    display: block;
}

/* Loading Indicator */
.loading-indicator {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--light-text);
    transition: opacity 0.3s ease;
}

.spinner {
    width: 18px;
    height: 18px;
    border: 2px solid rgba(106, 13, 173, 0.3);
    border-top: 2px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

/* Input Area */
.input-area {
    padding: 1rem;
    background-color: var(--bg-color);
    border-top: 1px solid var(--border-color);
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 100;
}

.input-form {
    max-width: 800px;
    margin: 0 auto;
}

.input-container {
    position: relative;
    display: flex;
    align-items: flex-end;
}

.prompt-input {
    width: 100%;
    min-height: 50px;
    max-height: 200px;
    padding: 0.9rem 4rem 0.9rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: 1.5rem;
    resize: none;
    background-color: var(--input-bg);
    font-size: 1rem;
    line-height: 1.5;
    transition: border-color 0.2s;
    outline: none;
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
}

.prompt-input:focus {
    border-color: var(--primary-light);
    box-shadow: 0 0 0 2px rgba(106, 13, 173, 0.2);
}

.generate-btn {
    position: absolute;
    bottom: 0.5rem;
    right: 0.5rem;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: var(--primary-color);
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color 0.2s;
}

.generate-btn:hover:not(:disabled) {
    background-color: var(--primary-light);
}

.generate-btn:disabled {
    background-color: #e0e0e0;
    cursor: not-allowed;
}

.generate-btn .stop-icon {
    display: none;
}

/* Scroll to Bottom Button */
.scroll-to-bottom-btn {
    position: fixed;
    bottom: 100px;
    right: 20px;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background-color: var(--primary-color);
    border: none;
    cursor: pointer;
    display: none;
    align-items: center;
    justify-content: center;
    box-shadow: 0 2px 10px rgba(0,0,0,0.2);
    z-index: 99;
    transition: all 0.3s ease;
}

.scroll-to-bottom-btn.visible {
    display: flex;
}

.scroll-to-bottom-btn:hover {
    background-color: var(--primary-light);
    transform: translateY(-2px);
}

/* Context Menus */
.context-menu {
    position: fixed;
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    box-shadow: 0 5px 15px rgba(0,0,0,0.2);
    display: none;
    flex-direction: column;
    z-index: 1000;
    min-width: 120px;
    opacity: 0;
    transform: scale(0.95);
    transition: opacity 0.2s, transform 0.2s;
}

.context-menu.show {
    opacity: 1;
    transform: scale(1);
}

.context-menu-item {
    padding: 0.75rem 1rem;
    background: none;
    border: none;
    text-align: left;
    cursor: pointer;
    font-size: 0.9rem;
    transition: background-color 0.2s;
}

.context-menu-item:hover {
    background-color: var(--input-bg);
}

.context-menu-item:first-child {
    border-top-left-radius: 0.5rem;
    border-top-right-radius: 0.5rem;
}

.context-menu-item:last-child {
    border-bottom-left-radius: 0.5rem;
    border-bottom-right-radius: 0.5rem;
}

/* Modals */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 10000;
}

.modal-content {
    background: white;
    padding: 2rem;
    border-radius: 0.5rem;
    box-shadow: 0 10px 25px rgba(0,0,0,0.3);
    max-width: 400px;
    width: 90%;
    max-height: 80vh;
    overflow-y: auto;
}

.modal-content h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
    font-size: 1.2rem;
}

.modal-content p {
    margin-bottom: 1.5rem;
    color: var(--text-color);
    line-height: 1.5;
}

.modal-content input {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 0.25rem;
    margin-bottom: 1.5rem;
    font-size: 1rem;
}

.modal-content input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(106, 13, 173, 0.2);
}

.modal-buttons {
    display: flex;
    gap: 1rem;
    justify-content: flex-end;
}

.modal-buttons button {
    padding: 0.5rem 1rem;
    border: none;
    border-radius: 0.25rem;
    cursor: pointer;
    font-size: 0.9rem;
    transition: all 0.2s;
}

.modal-buttons button:first-child {
    background: var(--primary-color);
    color: white;
}

.modal-buttons button:first-child:hover {
    background: var(--primary-light);
}

.modal-buttons button:last-child {
    background: #f5f5f5;
    color: var(--text-color);
}

.modal-buttons button:last-child:hover {
    background: #e0e0e0;
}

/* Toast Notifications */
.toast {
    position: fixed;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    padding: 12px 24px;
    border-radius: 4px;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.2);
    z-index: 10000;
    display: flex;
    align-items: center;
    gap: 10px;
    animation: slide-in 0.3s ease-out;
}

.toast.error {
    background: var(--error-color);
    color: white;
}

.toast.success {
    background: var(--success-color);
    color: white;
}

.toast.info {
    background: #2196f3;
    color: white;
}

.toast.fade-out {
    animation: fade-out 0.3s ease-out;
}

.toast-icon {
    font-size: 1.2rem;
    font-weight: bold;
}

/* Animations */
@keyframes slide-in {
    from { opacity: 0; transform: translateX(-50%) translateY(-30px); }
    to { opacity: 1; transform: translateX(-50%) translateY(0); }
}

@keyframes fade-out {
    from { opacity: 1; transform: translateX(-50%) translateY(0); }
    to { opacity: 0; transform: translateX(-50%) translateY(-30px); }
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

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

/* Responsive Design */
@media (min-width: 769px) {
    .sidebar {
        transform: translateX(0);
        position: relative;
        top: 0;
    }
    
    .menu-btn {
        display: none;
    }
}

@media (max-width: 768px) {
    .sidebar {
        width: 280px;
    }

    .message,
    .ai-message-content {
        max-width: 95%;
        padding: 0.75rem 1rem;
    }

    .user-message {
        max-width: 85%;
    }

    .header {
        padding: 0.75rem 1rem;
    }

    .input-area {
        padding: 0.75rem;
    }

    .prompt-input {
        padding: 0.75rem 3.5rem 0.75rem 0.75rem;
        min-height: 45px;
    }

    .generate-btn {
        width: 36px;
        height: 36px;
        bottom: 0.375rem;
        right: 0.375rem;
    }

    .scroll-to-bottom-btn {
        bottom: 80px;
        right: 15px;
        width: 45px;
        height: 45px;
    }
    
    .context-menu {
        min-width: 140px;
        box-shadow: 0 8px 25px rgba(0,0,0,0.3);
    }
    
    .context-menu-item {
        padding: 1rem 1.25rem;
        font-size: 1rem;
        min-height: 48px;
        display: flex;
        align-items: center;
    }
}