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

:root {
    --primary-color: #FFB454;
    --secondary-color: #FFA726;
    --bg-color: #171717;
    --surface-color: #212121;
    --chat-bg: #212121;
    --text-color: #ececec;
    --text-secondary: #a1a1aa;
    --border-color: #2e2e2e;
    --user-msg-bg: transparent;
    --assistant-msg-bg: transparent;
    --sidebar-width: 280px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', sans-serif;
    background: var(--bg-color);
    color: var(--text-color);
    height: 100vh;
    height: 100dvh; /* Dynamic viewport height - accounts for mobile browser chrome */
    overflow: hidden;
    display: flex;
}

/* Sidebar */
.sidebar {
    width: var(--sidebar-width);
    background: var(--surface-color);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    height: 100vh;
    height: 100dvh;
}

.sidebar-header {
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.new-chat-btn {
    width: 40px;
    height: 40px;
    padding: 0;
    background: transparent;
    color: var(--text-color);
    border: 1px solid var(--border-color);
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
}

.new-chat-btn:hover {
    background: var(--bg-color);
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.conversation-list {
    flex: 1;
    overflow-y: auto;
    padding: 0.5rem;
}

.conversation-item {
    padding: 0.875rem 1rem;
    margin-bottom: 0.25rem;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s;
    position: relative;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.conversation-item:hover {
    background: var(--bg-color);
}

.conversation-item.active {
    background: var(--bg-color);
    border-left: 3px solid var(--primary-color);
}

.conversation-title {
    font-size: 0.875rem;
    color: var(--text-color);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    flex: 1;
}

.conversation-time {
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-top: 0.25rem;
}

.delete-conversation-btn {
    opacity: 0;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.25rem;
    border-radius: 4px;
    transition: all 0.2s;
}

.conversation-item:hover .delete-conversation-btn {
    opacity: 1;
}

.delete-conversation-btn:hover {
    color: #ef4444;
    background: rgba(239, 68, 68, 0.1);
}

.loading-conversations {
    text-align: center;
    padding: 2rem 1rem;
    color: var(--text-secondary);
    font-size: 0.875rem;
}

/* Main Content */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    height: 100vh;
    height: 100dvh;
    overflow: hidden;
    position: relative;
}

.container {
    display: flex;
    flex-direction: column;
    height: 100vh;
    height: 100dvh;
    max-width: 100%;
    margin: 0;
    width: 100%;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
    background: var(--surface-color);
}

header h1 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--primary-color);
}

.menu-btn {
    display: none;
    background: transparent;
    border: none;
    color: var(--text-color);
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 6px;
    transition: all 0.2s;
}

.menu-btn:hover {
    background: var(--bg-color);
}

.model-select {
    padding: 0.5rem 1rem;
    background: var(--bg-color);
    color: var(--text-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.2s;
}

.model-select:hover {
    border-color: var(--primary-color);
}

/* Admin controls */
.admin-controls {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.admin-user-select {
    padding: 0.5rem 1rem;
    background: #2d1f1f;
    color: #ff9999;
    border: 1px solid #663333;
    border-radius: 8px;
    font-size: 0.85rem;
    cursor: pointer;
    transition: all 0.2s;
    max-width: 150px;
}

.admin-user-select:hover {
    border-color: #ff6666;
}

.admin-user-select:focus {
    outline: none;
    border-color: #ff6666;
    box-shadow: 0 0 0 2px rgba(255, 102, 102, 0.2);
}

.viewing-as-banner {
    background: #2d1f1f;
    color: #ff9999;
    text-align: center;
    padding: 0.5rem;
    font-size: 0.85rem;
    border-bottom: 1px solid #663333;
}

.header-controls {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.tools-btn {
    padding: 0.5rem;
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.tools-btn:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
    background: var(--surface-color);
}

.chat-container {
    flex: 1;
    overflow-y: auto;
    padding: 2rem 1.5rem;
    scroll-behavior: smooth;
    background: var(--chat-bg);
}

.welcome-message {
    text-align: center;
    margin-top: 20vh;
    opacity: 0.7;
}

.welcome-message h2 {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.message {
    display: flex;
    margin-bottom: 0.5rem;
    animation: fadeIn 0.3s ease-in;
    padding: 0.5rem 0;
}

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

.message-content {
    max-width: 80%;
    padding: 0.5rem 0;
    border-radius: 0;
    line-height: 1.3;
    word-wrap: break-word;
    white-space: pre-wrap;
    font-size: 0.9375rem;
}

.user-message .message-content {
    background: transparent;
    margin-left: auto;
    color: var(--text-color);
    font-weight: 400;
}

.assistant-message .message-content {
    background: transparent;
    border: none;
    color: var(--text-color);
}

.typing-indicator {
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.typing-indicator span {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--text-secondary);
    animation: typing 1.4s infinite;
}

.typing-indicator span:nth-child(2) {
    animation-delay: 0.2s;
}

.typing-indicator span:nth-child(3) {
    animation-delay: 0.4s;
}

@keyframes typing {
    0%, 60%, 100% { transform: translateY(0); opacity: 0.7; }
    30% { transform: translateY(-10px); opacity: 1; }
}

.input-area {
    display: flex;
    gap: 0.75rem;
    padding: 1rem 1.5rem;
    padding-bottom: calc(1rem + env(safe-area-inset-bottom, 0px)); /* iOS safe area */
    background: var(--surface-color);
    border-top: 1px solid var(--border-color);
    flex-wrap: wrap;
    align-items: flex-end;
    position: relative;
}

.attach-btn {
    padding: 0.875rem;
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.attach-btn:hover {
    color: var(--primary-color);
    border-color: var(--primary-color);
    background: rgba(255, 180, 84, 0.05);
}

.attached-files {
    position: absolute;
    bottom: 100%;
    left: 1.5rem;
    right: 1.5rem;
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    padding: 0.5rem 0;
    max-height: 150px;
    overflow-y: auto;
}

.file-chip {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 0.75rem;
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    font-size: 0.875rem;
    color: var(--text-color);
    animation: slideIn 0.2s ease-out;
}

.file-chip.loading {
    color: var(--text-secondary);
    font-style: italic;
}

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

.file-icon {
    font-size: 1rem;
}

.file-name {
    max-width: 200px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.file-type-badge {
    display: inline-block;
    padding: 0.125rem 0.5rem;
    background: var(--primary-color);
    color: var(--bg-color);
    font-size: 0.625rem;
    font-weight: 600;
    text-transform: uppercase;
    border-radius: 10px;
    letter-spacing: 0.025em;
}

.remove-file-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.25rem;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
}

.remove-file-btn:hover {
    background: rgba(239, 68, 68, 0.1);
    color: #ef4444;
}

#userInput {
    flex: 1;
    padding: 0.875rem 1rem;
    background: var(--bg-color);
    color: var(--text-color);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    font-size: 1rem;
    font-family: inherit;
    resize: none;
    max-height: 200px;
    transition: all 0.2s;
}

#userInput:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.send-btn {
    padding: 0.875rem;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.send-btn:hover:not(:disabled) {
    background: var(--secondary-color);
    transform: scale(1.05);
}

.send-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.error-message {
    background: #ef4444 !important;
    color: white;
}

.mobile-only {
    display: none;
}

/* Mobile responsiveness */
@media (max-width: 768px) {
    .sidebar {
        position: fixed;
        left: -100%;
        top: 0;
        z-index: 1000;
        transition: left 0.3s ease;
    }
    
    .sidebar.active {
        left: 0;
    }
    
    .main-content {
        width: 100%;
    }
    
    .mobile-only {
        display: block;
    }
    
    .toggle-sidebar-btn {
        padding: 0.5rem;
        background: transparent;
        border: none;
        color: var(--text-color);
        cursor: pointer;
        border-radius: 6px;
        transition: all 0.2s;
    }
    
    .toggle-sidebar-btn:hover {
        background: var(--bg-color);
    }
    
    header h1 {
        font-size: 1.25rem;
    }
    
    .model-select {
        font-size: 0.8rem;
        padding: 0.4rem 0.8rem;
    }
    
    .message-content {
        max-width: 90%;
        padding: 0.875rem 1rem;
    }
    
    .chat-container {
        padding: 1rem;
    }
    
    .welcome-message {
        margin-top: 10vh; /* Reduced from 20vh to show input sooner */
        padding: 1rem;
    }
    
    .welcome-message h2 {
        font-size: 1.25rem; /* Smaller for mobile */
        margin-bottom: 0.25rem;
    }
    
    .welcome-message p {
        font-size: 0.875rem;
    }
    
    .input-area {
        padding: 0.75rem 1rem;
        padding-bottom: calc(0.75rem + env(safe-area-inset-bottom, 0px));
    }
}

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

.chat-container::-webkit-scrollbar-track,
.conversation-list::-webkit-scrollbar-track {
    background: var(--bg-color);
}

.chat-container::-webkit-scrollbar-thumb,
.conversation-list::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

.chat-container::-webkit-scrollbar-thumb:hover,
.conversation-list::-webkit-scrollbar-thumb:hover {
    background: #3f3f46;
}

/* Markdown Styling */
.message-content table {
    border-collapse: collapse;
    width: 100%;
    margin: 1rem 0;
    background: transparent;
    border-radius: 6px;
    overflow: hidden;
    border: 1px solid var(--border-color);
}

.message-content th,
.message-content td {
    padding: 0.75rem 1rem;
    text-align: left;
    border: 1px solid rgba(255, 255, 255, 0.06);
}

.message-content th {
    background: rgba(255, 255, 255, 0.03);
    color: var(--text-color);
    font-weight: 600;
    border-bottom: 2px solid var(--border-color);
}

.message-content tr:hover {
    background: rgba(255, 255, 255, 0.02);
}

.message-content code {
    background: var(--bg-color);
    padding: 0.2rem 0.4rem;
    border-radius: 3px;
    font-family: 'Monaco', 'Courier New', monospace;
    font-size: 0.9em;
    color: #a5b4fc;
}

.message-content pre {
    background: var(--bg-color);
    padding: 0.75rem;
    border-radius: 6px;
    overflow-x: auto;
    margin: 0.2rem 0;
    border: 1px solid var(--border-color);
}

.message-content pre code {
    background: none;
    padding: 0;
    color: var(--text-color);
}

.message-content ul, 
.message-content ol {
    padding-left: 1.5rem;
    margin: 0 !important;
    padding-top: 0 !important;
    padding-bottom: 0 !important;
}

.message-content li {
    margin: 0 !important;
    margin-top: -0.15rem !important;
    margin-bottom: 0 !important;
    line-height: 1.0 !important;
    padding: 0 !important;
}

.message-content li p {
    margin: 0 !important;
    margin-top: 0 !important;
    margin-bottom: 0 !important;
    padding: 0 !important;
    display: inline !important;
    line-height: 1.0 !important;
}

.message-content ul li,
.message-content ol li {
    margin: 0 !important;
    margin-top: -0.15rem !important;
    margin-bottom: 0 !important;
    padding: 0 !important;
    line-height: 1.0 !important;
}

.message-content ol li p,
.message-content ul li p {
    margin: 0 !important;
    padding: 0 !important;
    display: inline !important;
}

.message-content blockquote {
    border-left: 3px solid var(--primary-color);
    padding-left: 1rem;
    margin: 0.2rem 0;
    color: var(--text-secondary);
    font-style: italic;
}

.message-content h1, 
.message-content h2, 
.message-content h3,
.message-content h4,
.message-content h5,
.message-content h6 {
    margin: 0.5rem 0 0 0 !important;
    color: var(--text-color);
    font-weight: 600;
}

.message-content h1 {
    font-size: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.375rem;
}

.message-content h2 {
    font-size: 1.25rem;
}

.message-content h3 {
    font-size: 1.125rem;
}

.message-content p {
    margin: 0 0;
    line-height: 1.3;
}

.message-content strong {
    color: var(--primary-color);
    font-weight: 600;
}

.message-content em {
    color: var(--text-color);
    font-style: italic;
}

.message-content a {
    color: var(--primary-color);
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition: all 0.2s;
}

.message-content a:hover {
    border-bottom-color: var(--primary-color);
}

.message-content hr {
    border: none;
    border-top: 1px solid var(--border-color);
    margin: 1rem 0;
}

.message-content img {
    max-width: 100%;
    border-radius: 8px;
    margin: 1rem 0;
}

/* Drag and Drop Overlay */
.drop-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(23, 23, 23, 0.95);
    backdrop-filter: blur(10px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 100;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

.drop-overlay.visible {
    opacity: 1;
    pointer-events: all;
}

.drop-overlay-content {
    text-align: center;
    padding: 3rem;
    border: 2px dashed var(--primary-color);
    border-radius: 20px;
    background: rgba(255, 180, 84, 0.05);
    max-width: 500px;
}

.drop-overlay-content svg {
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-10px);
    }
}

.drop-overlay-content h3 {
    font-size: 1.5rem;
    color: var(--text-color);
    margin-bottom: 0.75rem;
    font-weight: 600;
}

.drop-overlay-content p {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Error Modal */
.error-modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.75);
    backdrop-filter: blur(5px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

.error-modal.visible {
    opacity: 1;
    pointer-events: all;
}

.error-modal-content {
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 2rem;
    max-width: 450px;
    width: 90%;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
    animation: modalSlideIn 0.3s ease-out;
}

@keyframes modalSlideIn {
    from {
        transform: translateY(-20px) scale(0.95);
        opacity: 0;
    }
    to {
        transform: translateY(0) scale(1);
        opacity: 1;
    }
}

.error-modal-header {
    text-align: center;
    margin-bottom: 1.5rem;
}

.error-modal-header svg {
    color: var(--primary-color);
}

.error-modal-body {
    margin-bottom: 1.5rem;
}

.error-modal-body p {
    color: var(--text-color);
    font-size: 1rem;
    line-height: 1.6;
    white-space: pre-line;
    text-align: center;
}

.error-modal-close {
    width: 100%;
    padding: 0.875rem;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 10px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

.error-modal-close:hover {
    background: var(--secondary-color);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(255, 180, 84, 0.3);
}

.error-modal-close:active {
    transform: translateY(0);
}

/* Copy Button */
/* Message Action Buttons Container */
.message-actions {
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
    display: flex;
    gap: 0.25rem;
    opacity: 0;
    transition: opacity 0.2s;
    z-index: 1;
}

.message:hover .message-actions {
    opacity: 1;
}

.action-btn {
    padding: 0.5rem;
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.action-btn:hover {
    background: var(--surface-color);
    color: var(--primary-color);
    border-color: var(--primary-color);
}

.action-btn.copied {
    color: #10b981;
    border-color: #10b981;
}

/* Legacy copy-btn support (for any remaining instances) */
.copy-btn:not(.action-btn) {
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
    padding: 0.5rem;
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-secondary);
    cursor: pointer;
    opacity: 0;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1;
}

.message:hover .copy-btn:not(.action-btn) {
    opacity: 1;
}

.copy-btn:not(.action-btn):hover {
    background: var(--surface-color);
    color: var(--primary-color);
    border-color: var(--primary-color);
}

.copy-btn:not(.action-btn).copied {
    color: #10b981;
    border-color: #10b981;
}

/* Stop Button */
.stop-btn {
    position: absolute;
    bottom: 0.5rem;
    right: 0.5rem;
    padding: 0.5rem 0.875rem;
    background: #ef4444;
    border: none;
    border-radius: 8px;
    color: white;
    cursor: pointer;
    font-size: 0.875rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.2s;
    animation: fadeIn 0.3s ease-in;
}

.stop-btn:hover {
    background: #dc2626;
    transform: scale(1.05);
}

.stop-btn svg {
    flex-shrink: 0;
}

/* Update message positioning to accommodate buttons */
.message {
    position: relative;
}

.assistant-message {
    padding-right: 3rem;
}

/* Mobile adjustments for new buttons */
@media (max-width: 768px) {
    .message-actions {
        opacity: 1;
    }
    
    .action-btn {
        padding: 0.4rem;
    }
    
    .copy-btn:not(.action-btn) {
        opacity: 1;
        padding: 0.4rem;
    }
    
    .stop-btn {
        font-size: 0.8rem;
        padding: 0.4rem 0.7rem;
    }
    
    .assistant-message {
        padding-right: 4.5rem;
    }
}

/* Document Correction Modal */
.doc-correction-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    z-index: 1000;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(4px);
}

.doc-correction-modal.visible {
    display: flex;
}

.doc-correction-content {
    background: var(--surface-color);
    border-radius: 16px;
    width: 90%;
    max-width: 600px;
    max-height: 80vh;
    overflow-y: auto;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
    animation: slideUp 0.3s ease-out;
}

@keyframes slideUp {
    from {
        transform: translateY(20px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.doc-correction-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.doc-correction-header h3 {
    margin: 0;
    font-size: 1.25rem;
    color: var(--text-color);
}

.doc-correction-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    transition: all 0.2s;
}

.doc-correction-close:hover {
    background: var(--bg-color);
    color: var(--text-color);
}

.doc-correction-body {
    padding: 1.5rem;
}

.doc-correction-body p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.doc-upload-section {
    margin-bottom: 1.5rem;
}

.doc-upload-section label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-color);
    font-weight: 500;
}

.doc-upload-section input[type="file"] {
    display: block;
    width: 100%;
    padding: 0.75rem;
    background: var(--bg-color);
    border: 1px dashed var(--border-color);
    border-radius: 8px;
    color: var(--text-color);
    cursor: pointer;
}

#docFileName {
    display: block;
    margin-top: 0.5rem;
    color: var(--primary-color);
    font-size: 0.875rem;
}

.instructions-section {
    margin-bottom: 1.5rem;
}

.instructions-section label {
    display: block;
    margin-bottom: 0.75rem;
    color: var(--text-color);
    font-weight: 500;
}

.instructions-section textarea {
    width: 100%;
    min-height: 150px;
    padding: 1rem;
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-color);
    font-size: 0.9rem;
    font-family: inherit;
    resize: vertical;
    line-height: 1.5;
}

.instructions-section textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.instructions-section textarea::placeholder {
    color: var(--text-secondary);
    opacity: 0.7;
}

.apply-corrections-btn {
    width: 100%;
    padding: 1rem;
    background: linear-gradient(135deg, var(--primary-color), #8b5cf6);
    border: none;
    border-radius: 8px;
    color: white;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    margin-top: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.apply-corrections-btn .btn-icon {
    font-size: 1.1rem;
}

.apply-corrections-btn:hover:not(:disabled) {
    background: var(--primary-hover);
    transform: translateY(-1px);
}

.apply-corrections-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

#correctionStatus {
    margin-top: 1rem;
    text-align: center;
    font-size: 0.9rem;
}

#correctionStatus .error {
    color: #ef4444;
}

#correctionStatus .success {
    color: #10b981;
}

#correctionStatus .processing {
    color: var(--primary-color);
}

/* =============================================================================
   AUTHENTICATION STYLES
   ============================================================================= */

.auth-modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--bg-color);
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

.auth-modal.visible {
    opacity: 1;
    pointer-events: all;
}

.auth-modal-content {
    width: 100%;
    max-width: 400px;
    padding: 2.5rem;
    background: var(--surface-color);
    border-radius: 16px;
    border: 1px solid var(--border-color);
    box-shadow: 0 25px 80px rgba(0, 0, 0, 0.5);
    animation: authSlideIn 0.4s ease-out;
}

@keyframes authSlideIn {
    from {
        transform: translateY(-30px) scale(0.95);
        opacity: 0;
    }
    to {
        transform: translateY(0) scale(1);
        opacity: 1;
    }
}

.auth-header {
    text-align: center;
    margin-bottom: 2rem;
}

.auth-header h1 {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
    font-weight: 700;
}

.auth-subtitle {
    color: var(--text-secondary);
    font-size: 1rem;
}

.auth-form {
    display: none;
}

.auth-form.active {
    display: block;
    animation: fadeIn 0.3s ease;
}

.auth-form h2 {
    font-size: 1.25rem;
    margin-bottom: 1.5rem;
    color: var(--text-color);
    text-align: center;
}

.form-group {
    margin-bottom: 1rem;
}

.form-group input {
    width: 100%;
    padding: 0.875rem 1rem;
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    color: var(--text-color);
    font-size: 1rem;
    transition: all 0.2s;
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(255, 180, 84, 0.15);
}

.form-group input::placeholder {
    color: var(--text-secondary);
}

.auth-btn {
    width: 100%;
    padding: 0.875rem;
    background: var(--primary-color);
    color: #1a1a1a;
    border: none;
    border-radius: 10px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    margin-top: 0.5rem;
}

.auth-btn:hover {
    background: var(--secondary-color);
    transform: translateY(-1px);
    box-shadow: 0 4px 15px rgba(255, 180, 84, 0.3);
}

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

.auth-switch {
    text-align: center;
    margin-top: 1.5rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.auth-switch a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
}

.auth-switch a:hover {
    text-decoration: underline;
}

.auth-error {
    margin-top: 1rem;
    padding: 0.75rem 1rem;
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.3);
    border-radius: 8px;
    color: #ef4444;
    font-size: 0.875rem;
    text-align: center;
    display: none;
}

.auth-error.visible {
    display: block;
    animation: shake 0.4s ease;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-5px); }
    75% { transform: translateX(5px); }
}

/* User Menu */
.header-right {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.user-menu {
    position: relative;
}

.user-menu-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 0.75rem;
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-color);
    cursor: pointer;
    transition: all 0.2s;
    font-size: 0.9rem;
}

.user-menu-btn:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

#usernameDisplay {
    max-width: 120px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.user-dropdown {
    position: absolute;
    top: 100%;
    right: 0;
    margin-top: 0.5rem;
    min-width: 150px;
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.2s;
    z-index: 100;
}

.user-dropdown.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    width: 100%;
    padding: 0.75rem 1rem;
    background: transparent;
    border: none;
    color: var(--text-color);
    font-size: 0.875rem;
    cursor: pointer;
    transition: all 0.2s;
    text-align: left;
}

.dropdown-item:hover {
    background: var(--bg-color);
    color: var(--primary-color);
}

.dropdown-item svg {
    flex-shrink: 0;
}

/* Hide chat interface when not authenticated */
body.not-authenticated .sidebar,
body.not-authenticated .main-content {
    display: none;
}

/* Mobile auth adjustments */
@media (max-width: 768px) {
    .auth-modal-content {
        margin: 1rem;
        padding: 1.5rem;
    }
    
    .auth-header h1 {
        font-size: 2rem;
    }
    
    .user-menu-btn {
        padding: 0.4rem 0.6rem;
        font-size: 0.8rem;
    }
    
    #usernameDisplay {
        max-width: 80px;
    }
}

/* =============================================================================
   ADMIN MEMORY MODAL
   ============================================================================= */

.memory-btn {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.5rem 0.875rem;
    background: #1f2d1f;
    color: #99ff99;
    border: 1px solid #336633;
    border-radius: 8px;
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
}

.memory-btn:hover {
    background: #2d3d2d;
    border-color: #66ff66;
}

.memory-btn svg {
    flex-shrink: 0;
}

/* Memory Modal Overlay */
.memory-modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(5px);
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

.memory-modal.visible {
    opacity: 1;
    pointer-events: all;
}

.memory-modal-content {
    width: 95%;
    max-width: 700px;
    max-height: 85vh;
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    display: flex;
    flex-direction: column;
    box-shadow: 0 25px 80px rgba(0, 0, 0, 0.5);
    animation: memoryModalIn 0.3s ease-out;
    overflow: hidden;
}

@keyframes memoryModalIn {
    from {
        transform: translateY(-20px) scale(0.95);
        opacity: 0;
    }
    to {
        transform: translateY(0) scale(1);
        opacity: 1;
    }
}

.memory-modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
    background: var(--bg-color);
}

.memory-modal-header h2 {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.25rem;
    color: var(--text-color);
    margin: 0;
}

.memory-modal-header h2 svg {
    color: #99ff99;
}

.memory-modal-close {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 8px;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.memory-modal-close:hover {
    background: var(--surface-color);
    color: #ef4444;
}

/* Stats Bar */
.memory-modal-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1rem;
    padding: 1rem 1.5rem;
    background: var(--bg-color);
    border-bottom: 1px solid var(--border-color);
}

.stat-item {
    text-align: center;
}

.stat-label {
    display: block;
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-bottom: 0.25rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.stat-value {
    display: block;
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--primary-color);
}

/* Memory Body */
.memory-modal-body {
    flex: 1;
    overflow-y: auto;
    padding: 1.5rem;
}

.memory-loading {
    text-align: center;
    padding: 3rem;
    color: var(--text-secondary);
}

.memory-empty {
    text-align: center;
    padding: 3rem;
    color: var(--text-secondary);
}

.memory-empty svg {
    width: 48px;
    height: 48px;
    margin-bottom: 1rem;
    opacity: 0.5;
}

/* Memory Categories */
.memory-category {
    margin-bottom: 1.5rem;
}

.memory-category:last-child {
    margin-bottom: 0;
}

.memory-category-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.75rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--border-color);
}

.memory-category-icon {
    font-size: 1rem;
}

.memory-category-name {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-color);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.memory-category-count {
    font-size: 0.75rem;
    color: var(--text-secondary);
    background: var(--bg-color);
    padding: 0.125rem 0.5rem;
    border-radius: 10px;
}

.memory-items {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.memory-item {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    padding: 0.75rem;
    background: var(--bg-color);
    border-radius: 8px;
    border: 1px solid transparent;
    transition: all 0.2s;
}

.memory-item:hover {
    border-color: var(--border-color);
}

.memory-item-key {
    flex-shrink: 0;
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--primary-color);
    min-width: 100px;
}

.memory-item-value {
    flex: 1;
    font-size: 0.875rem;
    color: var(--text-color);
    line-height: 1.4;
}

/* Modal Footer */
.memory-modal-footer {
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--border-color);
    background: var(--bg-color);
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.memory-modal-footer strong {
    color: var(--text-color);
}

/* Schema Known Fields */
.known-fields-section {
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
}

.known-fields-header {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-color);
    margin-bottom: 0.75rem;
}

.known-fields-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.known-field-tag {
    font-size: 0.75rem;
    padding: 0.25rem 0.5rem;
    background: rgba(153, 255, 153, 0.1);
    border: 1px solid rgba(153, 255, 153, 0.3);
    border-radius: 4px;
    color: #99ff99;
}

/* Mobile Adjustments */
@media (max-width: 768px) {
    .memory-modal-content {
        width: 100%;
        height: 100%;
        max-height: 100%;
        border-radius: 0;
    }
    
    .memory-modal-stats {
        grid-template-columns: repeat(2, 1fr);
        gap: 0.75rem;
    }
    
    .memory-btn {
        padding: 0.4rem 0.6rem;
        font-size: 0.8rem;
    }
    
    .memory-btn span {
        display: none;
    }
    
    .memory-item {
        flex-direction: column;
        gap: 0.25rem;
    }
    
    .memory-item-key {
        min-width: auto;
    }
}

/* =============================================================================
   REGISTRATION FORM ENHANCEMENTS
   ============================================================================= */

.form-group textarea {
    width: 100%;
    padding: 0.875rem 1rem;
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    color: var(--text-color);
    font-size: 0.95rem;
    font-family: inherit;
    resize: vertical;
    min-height: 60px;
    transition: all 0.2s;
}

.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(255, 180, 84, 0.15);
}

.form-group textarea::placeholder {
    color: var(--text-secondary);
}

/* Registration Success State */
.registration-success {
    text-align: center;
    padding: 1rem 0;
    animation: fadeIn 0.4s ease;
}

.registration-success svg {
    color: #10b981;
    margin-bottom: 1rem;
}

.registration-success h3 {
    font-size: 1.25rem;
    color: var(--text-color);
    margin-bottom: 0.75rem;
}

.registration-success p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 1.5rem;
    line-height: 1.5;
}

/* =============================================================================
   ADMIN PANEL BUTTON
   ============================================================================= */

.admin-panel-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
    padding: 0.5rem 0.75rem;
    background: #1f1f2d;
    color: #a5b4fc;
    border: 1px solid #3d3d5c;
    border-radius: 8px;
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    position: relative;
}

.admin-panel-btn:hover {
    background: #2d2d4d;
    border-color: #6366f1;
}

.admin-panel-btn svg {
    flex-shrink: 0;
}

.admin-pending-badge {
    position: absolute;
    top: -6px;
    right: -6px;
    min-width: 18px;
    height: 18px;
    padding: 0 5px;
    background: #ef4444;
    color: white;
    font-size: 0.7rem;
    font-weight: 700;
    border-radius: 9px;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% {
        box-shadow: 0 0 0 0 rgba(239, 68, 68, 0.4);
    }
    50% {
        box-shadow: 0 0 0 6px rgba(239, 68, 68, 0);
    }
}

/* =============================================================================
   ADMIN PANEL MODAL
   ============================================================================= */

.admin-modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(5px);
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

.admin-modal.visible {
    opacity: 1;
    pointer-events: all;
}

.admin-modal-content {
    width: 95%;
    max-width: 600px;
    max-height: 85vh;
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    display: flex;
    flex-direction: column;
    box-shadow: 0 25px 80px rgba(0, 0, 0, 0.5);
    animation: memoryModalIn 0.3s ease-out;
    overflow: hidden;
}

.admin-modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
    background: var(--bg-color);
}

.admin-modal-header h2 {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.25rem;
    color: var(--text-color);
    margin: 0;
}

.admin-modal-header h2 svg {
    color: #a5b4fc;
}

.admin-modal-close {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 8px;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.admin-modal-close:hover {
    background: var(--surface-color);
    color: #ef4444;
}

.admin-modal-body {
    flex: 1;
    overflow-y: auto;
    padding: 1rem;
}

.admin-loading {
    text-align: center;
    padding: 3rem;
    color: var(--text-secondary);
}

.admin-empty {
    text-align: center;
    padding: 2rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Admin Sections */
.admin-section {
    margin-bottom: 1.5rem;
}

.admin-section:last-child {
    margin-bottom: 0;
}

.admin-section-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1rem;
    border-radius: 8px;
    margin-bottom: 0.75rem;
    font-weight: 600;
}

.admin-section-header.pending {
    background: rgba(251, 191, 36, 0.1);
    color: #fbbf24;
}

.admin-section-header.approved {
    background: rgba(16, 185, 129, 0.1);
    color: #10b981;
}

.section-icon {
    font-size: 1rem;
}

.section-title {
    flex: 1;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.section-count {
    font-size: 0.8rem;
    padding: 0.125rem 0.5rem;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 10px;
}

/* User Items */
.admin-user-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.admin-user-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.875rem 1rem;
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    transition: all 0.2s;
}

.admin-user-item:hover {
    border-color: var(--primary-color);
}

.admin-user-item.pending {
    border-left: 3px solid #fbbf24;
}

.admin-user-item.admin {
    border-left: 3px solid #6366f1;
}

.user-info {
    flex: 1;
    min-width: 0;
}

.user-name {
    font-weight: 600;
    color: var(--text-color);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.admin-badge {
    font-size: 0.65rem;
    padding: 0.125rem 0.4rem;
    background: #6366f1;
    color: white;
    border-radius: 4px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-weight: 700;
}

.user-meta {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-top: 0.25rem;
}

.user-note {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-top: 0.5rem;
    padding: 0.5rem;
    background: rgba(255, 255, 255, 0.03);
    border-radius: 6px;
    font-style: italic;
    line-height: 1.4;
}

.user-actions {
    display: flex;
    gap: 0.5rem;
    flex-shrink: 0;
}

.approve-btn,
.delete-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 8px;
    border: none;
    cursor: pointer;
    transition: all 0.2s;
}

.approve-btn {
    background: rgba(16, 185, 129, 0.1);
    color: #10b981;
}

.approve-btn:hover {
    background: #10b981;
    color: white;
}

.delete-btn {
    background: rgba(239, 68, 68, 0.1);
    color: #ef4444;
}

.delete-btn:hover {
    background: #ef4444;
    color: white;
}

/* Mobile Adjustments */
@media (max-width: 768px) {
    .admin-modal-content {
        width: 100%;
        height: 100%;
        max-height: 100%;
        border-radius: 0;
    }
    
    .admin-panel-btn {
        padding: 0.4rem;
    }
    
    .admin-user-item {
        flex-direction: column;
        align-items: stretch;
        gap: 0.75rem;
    }
    
    .user-actions {
        justify-content: flex-end;
    }
}