/* Reset and Base Styles */
* {
    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;
    color: #333;
}

/* App Container */
.app-container {
    display: flex;
    flex-direction: column;
    height: 100vh;
    background: #f8f9fa;
}

/* Profile form grid */
.profile-content {
    padding: 0.5rem 0;
}

.profile-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px 16px;
    margin-bottom: 1rem;
}

.profile-actions {
    display: flex;
    gap: 10px;
    justify-content: flex-end;
}

.btn.btn-danger {
    background: #e03131;
    color: #fff;
    border: 1px solid #e03131;
}
.btn.btn-danger:hover { filter: brightness(0.95); }

.age-display {
    display: block;
    font-style: italic;
    opacity: 0.8;
}

@media (max-width: 640px) {
    .profile-grid { grid-template-columns: 1fr; }
}


/* Header */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    background: white;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    border-bottom: 1px solid #e9ecef;
}

.header-left {
    display: flex;
    flex-direction: column;
}

.logo {
    font-size: 1.8rem;
    font-weight: 700;
    color: #667eea;
    margin: 0;
}

.subtitle {
    font-size: 0.9rem;
    color: #6c757d;
    margin-top: -2px;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 1.5rem; /* Increased from 1rem */
}

.user-name {
    font-weight: 600;
    color: #495057;
    margin-right: 1rem;
    cursor: pointer;
    transition: color 0.2s ease;
}

.user-name:hover {
    color: #007bff;
}

/* Add specific spacing for auth buttons */
.auth-buttons {
    display: flex;
    gap: 1rem; /* Add spacing between login and register buttons */
}

.user-profile {
    display: flex;
    align-items: center;
    gap: 1rem; /* Add spacing between name and logout button */
}

/* Buttons */
.btn {
    padding: 0.5rem 1rem;
    border: none;
    border-radius: 6px;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

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

.btn-primary:hover {
    background: #5a6fd8;
    transform: translateY(-1px);
}

.btn-secondary {
    background: #f8f9fa;
    color: #495057;
    border: 1px solid #dee2e6;
}

.btn-secondary:hover {
    background: #e9ecef;
    border-color: #adb5bd;
}

/* Main Content */
.main-content {
    display: flex;
    flex: 1;
    overflow: hidden;
}

/* Sidebar */
.sidebar {
    width: 300px;
    background: white;
    border-right: 1px solid #e9ecef;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.sidebar-header {
    padding: 1rem;
    border-bottom: 1px solid #e9ecef;
}

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

.conversation-item {
    padding: 0.75rem 2.25rem 0.75rem 0.75rem; /* extra right padding for action icon */
    margin-bottom: 0.5rem;
    border-radius: 6px;
    cursor: pointer;
    transition: background-color 0.2s ease;
    border: 1px solid transparent;
    position: relative;
}

.conversation-item:hover {
    background: #f8f9fa;
}

.conversation-item.active {
    background: #e3f2fd;
    border-color: #2196f3;
}

.conversation-title {
    font-weight: 500;
    color: #495057;
    margin-bottom: 0.25rem;
}

.conversation-date {
    font-size: 0.8rem;
    color: #6c757d;
}

/* Conversation action button (3-dots) */
.action-menu-btn {
    position: absolute;
    right: 6px;
    top: 50%;
    transform: translateY(-50%);
    border: none;
    background: transparent;
    color: #adb5bd;
    padding: 6px;
    border-radius: 6px;
    opacity: 0;
    transition: opacity 0.2s ease, color 0.2s ease, background-color 0.2s ease;
    cursor: pointer;
}

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

.action-menu-btn:hover {
    color: #495057;
    background: rgba(0, 0, 0, 0.06);
}

/* Simple context menu */
.context-menu {
    position: absolute;
    right: 8px;
    top: 36px;
    background: var(--surface);
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: 8px;
    box-shadow: var(--shadow);
    z-index: 100;
    min-width: 160px;
    padding: 6px 0;
    display: none;
}
.context-menu.show { display: block; }
.context-menu button {
    width: 100%;
    padding: 8px 12px;
    background: transparent;
    border: none;
    text-align: left;
    color: var(--text);
    cursor: pointer;
}
.context-menu button:hover {
    background: rgba(0,0,0,0.06);
}
.context-menu .danger {
    color: #e03131;
}

/* Chat Area */
.chat-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    background: white;
}

.chat-container {
    flex: 1;
    overflow-y: auto;
    padding: 2rem 0; /* Remove side padding, only vertical */
    display: flex;
    flex-direction: column;
    align-items: center;
}

.welcome-message {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100%;
    text-align: center;
}

.welcome-content {
    max-width: 500px;
}

.welcome-icon {
    font-size: 4rem;
    color: #667eea;
    margin-bottom: 1rem;
}

.welcome-content h2 {
    font-size: 2rem;
    margin-bottom: 1rem;
    color: #495057;
}

.welcome-content p {
    font-size: 1.1rem;
    color: #6c757d;
    margin-bottom: 0.5rem;
}

/* Messages */
.messages-container {
    display: flex;
    flex-direction: column;
    gap: 2rem; /* Increased from 1.5rem */
    width: 100%;
    max-width: 700px;
    padding: 0 2rem;
    margin: 0 auto;
}

.message {
    width: 100%;
    display: flex;
    gap: 0;
    margin-bottom: 1rem; /* Add extra spacing between messages */
}

.message-content {
    max-width: 70%;
    padding: 1rem;
    border-radius: 12px;
    line-height: 1.5;
    word-break: break-word;
    box-sizing: border-box;
}

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

.message.assistant {
    justify-content: flex-start;
}

.message.user .message-content {
    background: #667eea;
    color: white;
    border-bottom-right-radius: 4px;
    margin-right: 20px; /* Add some right margin for user messages */
}

.message.assistant .message-content {
    background: #f8f9fa;
    color: #495057;
    border: 1px solid #e9ecef;
    border-bottom-left-radius: 4px;
    margin-left: -40px !important; /* Increased and made more specific */
}

/* Input Area */
.input-area {
    padding: 1.5rem 2rem;
    border-top: 1px solid #e9ecef;
    background: white;
}

.input-container {
    display: flex;
    gap: 1rem;
    align-items: flex-end;
    max-width: 800px;
    margin: 0 auto;
}

#messageInput {
    flex: 1;
    padding: 1rem;
    border: 1px solid #dee2e6;
    border-radius: 12px;
    font-size: 1rem;
    font-family: inherit;
    resize: none;
    min-height: 50px;
    max-height: 150px;
    transition: border-color 0.2s ease;
}

#messageInput:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.send-btn {
    width: 50px;
    height: 50px;
    border: none;
    border-radius: 50%;
    background: #667eea;
    color: white;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.send-btn:hover {
    background: #5a6fd8;
    transform: scale(1.05);
}

.send-btn:disabled {
    background: #6c757d;
    cursor: not-allowed;
    transform: none;
}

/* Modals */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    animation: fadeIn 0.3s ease;
}

.modal.show {
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-content {
    background: white;
    border-radius: 12px;
    padding: 2rem;
    width: 90%;
    max-width: 500px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.modal-header h2 {
    color: #495057;
    font-size: 1.5rem;
}

.close-btn {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: #6c757d;
    padding: 0;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: background-color 0.2s ease;
}

.close-btn:hover {
    background: #f8f9fa;
}

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

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: #495057;
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid #dee2e6;
    border-radius: 6px;
    font-size: 1rem;
    font-family: inherit;
    transition: border-color 0.2s ease;
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

/* Loading Overlay */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.loading-spinner {
    background: white;
    padding: 2rem;
    border-radius: 8px;
    text-align: center;
}

.loading-spinner i {
    font-size: 2rem;
    color: #007bff;
    margin-bottom: 1rem;
}

/* Profile Modal Styles */
.profile-content {
    padding: 1rem 0;
}

.profile-info {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.profile-field {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 0;
    border-bottom: 1px solid #e9ecef;
}

.profile-field:last-child {
    border-bottom: none;
}

.profile-field label {
    font-weight: 600;
    color: #495057;
    min-width: 120px;
}

.profile-field span {
    color: #212529;
    text-align: right;
    word-break: break-word;
    max-width: 200px;
}

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

/* Responsive Design */
@media (max-width: 768px) {
    .header {
        padding: 1rem;
    }
    
    .logo {
        font-size: 1.5rem;
    }
    
    .subtitle {
        font-size: 0.8rem;
    }
    
    .main-content {
        flex-direction: column;
    }
    
    .sidebar {
        width: 100%;
        height: 200px;
        border-right: none;
        border-bottom: 1px solid #e9ecef;
    }
    
    .chat-container {
        padding: 1rem;
    }
    
    .input-area {
        padding: 1rem;
    }
    
    .input-container {
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .send-btn {
        align-self: flex-end;
    }
    
    .modal-content {
        margin: 1rem;
        padding: 1.5rem;
    }
}

@media (max-width: 480px) {
    .header-right {
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .welcome-content h2 {
        font-size: 1.5rem;
    }
    
    .welcome-content p {
        font-size: 1rem;
    }
    
    .message-content {
        max-width: 85%;
    }
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 6px;
}

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

::-webkit-scrollbar-thumb {
    background: #c1c1c1;
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: #a8a8a8;
}

/* Enhanced Markdown styling for AI responses */
.message.assistant .message-content {
    white-space: normal;
    line-height: 1.6;
}

/* Headings */
.message.assistant .message-content h1,
.message.assistant .message-content h2,
.message.assistant .message-content h3,
.message.assistant .message-content h4,
.message.assistant .message-content h5,
.message.assistant .message-content h6 {
    margin: 1.5rem 0 0.75rem 0;
    color: #2c3e50;
    font-weight: 600;
    line-height: 1.3;
}

.message.assistant .message-content h1 {
    font-size: 1.75rem;
    border-bottom: 2px solid #e9ecef;
    padding-bottom: 0.5rem;
}

.message.assistant .message-content h2 {
    font-size: 1.5rem;
    border-bottom: 1px solid #e9ecef;
    padding-bottom: 0.25rem;
}

.message.assistant .message-content h3 {
    font-size: 1.25rem;
}

.message.assistant .message-content h4 {
    font-size: 1.1rem;
}

.message.assistant .message-content h5 {
    font-size: 1rem;
}

.message.assistant .message-content h6 {
    font-size: 0.9rem;
    color: #6c757d;
}

/* Paragraphs */
.message.assistant .message-content p {
    margin: 0.75rem 0;
    line-height: 1.6;
}

/* Strong and emphasis */
.message.assistant .message-content strong {
    font-weight: 700;
    color: #2c3e50;
}

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

.message.assistant .message-content strong em,
.message.assistant .message-content em strong {
    font-weight: 700;
    font-style: italic;
}

/* Code blocks and inline code */
.message.assistant .message-content code {
    background: #f8f9fa;
    padding: 0.2rem 0.4rem;
    border-radius: 4px;
    font-family: 'SF Mono', 'Monaco', 'Inconsolata', 'Roboto Mono', 'Source Code Pro', monospace;
    font-size: 0.875em;
    color: #e83e8c;
    border: 1px solid #e9ecef;
}

.message.assistant .message-content pre {
    background: #f8f9fa;
    padding: 1rem;
    border-radius: 8px;
    overflow-x: auto;
    margin: 1rem 0;
    border: 1px solid #e9ecef;
    position: relative;
}

.message.assistant .message-content pre code {
    background: none;
    padding: 0;
    border: none;
    color: #495057;
    font-size: 0.875rem;
    line-height: 1.5;
}

/* Lists */
.message.assistant .message-content ul,
.message.assistant .message-content ol {
    margin: 0.75rem 0;
    padding-left: 1.5rem;
}

.message.assistant .message-content ul {
    list-style-type: disc;
}

.message.assistant .message-content ol {
    list-style-type: decimal;
}

.message.assistant .message-content li {
    margin: 0.25rem 0;
    line-height: 1.5;
}

.message.assistant .message-content ul ul,
.message.assistant .message-content ol ol,
.message.assistant .message-content ul ol,
.message.assistant .message-content ol ul {
    margin: 0.25rem 0;
}

/* Links */
.message.assistant .message-content a {
    color: #667eea;
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition: all 0.2s ease;
}

.message.assistant .message-content a:hover {
    color: #5a6fd8;
    border-bottom-color: #5a6fd8;
}

/* Blockquotes */
.message.assistant .message-content blockquote {
    margin: 1rem 0;
    padding: 0.75rem 1rem;
    border-left: 4px solid #667eea;
    background: #f8f9fa;
    border-radius: 0 4px 4px 0;
    font-style: italic;
    color: #6c757d;
}

.message.assistant .message-content blockquote p {
    margin: 0;
}

/* Tables */
.message.assistant .message-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 1rem 0;
    font-size: 0.875rem;
}

.message.assistant .message-content th,
.message.assistant .message-content td {
    padding: 0.5rem;
    border: 1px solid #dee2e6;
    text-align: left;
}

.message.assistant .message-content th {
    background: #f8f9fa;
    font-weight: 600;
    color: #495057;
}

.message.assistant .message-content tr:nth-child(even) {
    background: #f8f9fa;
}

/* Horizontal rules */
.message.assistant .message-content hr {
    border: none;
    border-top: 1px solid #e9ecef;
    margin: 1.5rem 0;
}

/* Images */
.message.assistant .message-content img {
    max-width: 100%;
    height: auto;
    border-radius: 6px;
    margin: 0.5rem 0;
}

/* Task lists */
.message.assistant .message-content input[type="checkbox"] {
    margin-right: 0.5rem;
}

/* Code highlighting for different languages */
.message.assistant .message-content pre[class*="language-"] {
    background: #2d3748;
    color: #e2e8f0;
    border: 1px solid #4a5568;
}

.message.assistant .message-content pre[class*="language-"] code {
    color: #e2e8f0;
    background: none;
    border: none;
    padding: 0;
}

/* Prism.js integration */
.message.assistant .message-content pre {
    position: relative;
}

.message.assistant .message-content pre::before {
    content: attr(data-language);
    position: absolute;
    top: 0;
    right: 0;
    background: #4a5568;
    color: #e2e8f0;
    padding: 0.25rem 0.5rem;
    font-size: 0.75rem;
    border-radius: 0 8px 0 4px;
    font-family: 'SF Mono', 'Monaco', 'Inconsolata', 'Roboto Mono', 'Source Code Pro', monospace;
}

/* Dark mode code highlighting */
body.dark .message.assistant .message-content pre[class*="language-"] {
    background: #1a202c;
    border-color: #2d3748;
}

body.dark .message.assistant .message-content pre[class*="language-"]::before {
    background: #2d3748;
    color: #a0aec0;
}

/* Typing indicator */
.typing-indicator {
    opacity: 0.7;
}

.typing-content {
    display: flex;
    align-items: center;
    min-height: 20px;
}

.typing-dots {
    display: flex;
    gap: 4px;
}

.typing-dots span {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #6c757d;
    animation: typing 1.4s infinite ease-in-out;
}

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

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

.typing-dots span:nth-child(3) {
    animation-delay: 0s;
}

@keyframes typing {
    0%, 80%, 100% {
        transform: scale(0.8);
        opacity: 0.5;
    }
    40% {
        transform: scale(1);
        opacity: 1;
    }
} 

/* === Modern Theme Layer (overrides) === */
/* Design tokens */
:root {
    --bg-gradient: radial-gradient(1200px 600px at -10% -10%, rgba(102, 126, 234, 0.25) 0%, rgba(118, 75, 162, 0) 60%),
                    radial-gradient(1200px 600px at 110% 110%, rgba(118, 75, 162, 0.25) 0%, rgba(102, 126, 234, 0) 60%),
                    linear-gradient(135deg, #eef2ff 0%, #f8f9ff 100%);
    --surface: #ffffff;
    --surface-translucent: rgba(255, 255, 255, 0.7);
    --text: #1f2937;
    --muted: #6b7280;
    --primary: #667eea;
    --primary-600: #5a6fd8;
    --border: #e5e7eb;
    --shadow: 0 10px 25px rgba(2, 6, 23, 0.08);
}

body.dark {
    --bg-gradient: radial-gradient(1200px 600px at -10% -10%, rgba(102, 126, 234, 0.12) 0%, rgba(118, 75, 162, 0) 60%),
                    radial-gradient(1200px 600px at 110% 110%, rgba(118, 75, 162, 0.12) 0%, rgba(102, 126, 234, 0) 60%),
                    linear-gradient(135deg, #0f172a 0%, #111827 100%);
    --surface: #0b1220;
    --surface-translucent: rgba(17, 24, 39, 0.6);
    --text: #e5e7eb;
    --muted: #9ca3af;
    --primary: #8b9aff;
    --primary-600: #7a89fb;
    --border: #1f2937;
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
}

/* Base surface and typography overrides */
body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: var(--bg-gradient);
    color: var(--text);
}

.app-container { background: transparent; }

.header {
    background: var(--surface-translucent);
    backdrop-filter: saturate(180%) blur(12px);
    -webkit-backdrop-filter: saturate(180%) blur(12px);
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow);
}

.logo { color: var(--primary); }
.subtitle { color: var(--muted); }
.user-name { color: var(--text); }
.user-name:hover { color: var(--primary); }

/* Buttons */
.btn-primary {
    background: var(--primary);
    color: #fff;
}
.btn-primary:hover { background: var(--primary-600); }

.btn-secondary {
    background: transparent;
    color: var(--text);
    border: 1px solid var(--border);
}
.btn-secondary:hover { background: rgba(0,0,0,0.04); }

.btn-icon {
    width: 40px;
    height: 40px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text);
}
.btn-icon:hover { background: rgba(0,0,0,0.06); }

/* Panels */
.sidebar {
    background: var(--surface-translucent);
    backdrop-filter: saturate(180%) blur(12px);
    -webkit-backdrop-filter: saturate(180%) blur(12px);
    border-right: 1px solid var(--border);
}
.sidebar-header { border-bottom: 1px solid var(--border); }

.chat-area {
    background: var(--surface-translucent);
    backdrop-filter: saturate(180%) blur(8px);
    -webkit-backdrop-filter: saturate(180%) blur(8px);
}

.conversation-title { color: var(--text); }
.conversation-date { color: var(--muted); }
.conversation-item:hover { background: rgba(0,0,0,0.04); }
.conversation-item.active { background: rgba(102,126,234,0.12); border-color: var(--primary); }

/* Message bubbles */
.message-content {
    border-radius: 14px;
    box-shadow: var(--shadow);
}
.message.user .message-content { background: var(--primary); color: #fff; }
.message.assistant .message-content {
    background: var(--surface);
    color: var(--text);
    border: 1px solid var(--border);
}
.messages-container .message.assistant .message-content { margin-left: 0 !important; }

/* Input area */
.input-area {
    background: var(--surface-translucent);
    border-top: 1px solid var(--border);
    backdrop-filter: saturate(180%) blur(8px);
}
#messageInput {
    background: rgba(255,255,255,0.5);
    border: 1px solid var(--border);
    border-radius: 14px;
    color: var(--text);
}
#messageInput:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.15);
}
.send-btn {
    background: linear-gradient(135deg, var(--primary), var(--primary-600));
    color: #fff;
}
.send-btn:hover { filter: brightness(1.05); }

/* Modals and forms */
.modal-content { background: var(--surface); border-radius: 16px; box-shadow: var(--shadow); }
.modal-header h2 { color: var(--text); }
.close-btn { color: var(--muted); }
.close-btn:hover { background: rgba(0,0,0,0.06); }
.form-group label { color: var(--text); }
.form-group input, .form-group select { background: transparent; color: var(--text); border: 1px solid var(--border); }
.form-group input:focus, .form-group select:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.15);
}

/* Misc */
.welcome-icon { color: var(--primary); }
.welcome-content h2 { color: var(--text); }
.welcome-content p { color: var(--muted); }
.loading-spinner i { color: var(--primary); }
.message.assistant .message-content a { color: var(--primary); }
.message.assistant .message-content h1,
.message.assistant .message-content h2,
.message.assistant .message-content h3 { color: var(--text); }
.loading-spinner { background: var(--surface); box-shadow: var(--shadow); }
/* Dark mode markdown styling */
body.dark .message.assistant .message-content {
    color: var(--text);
}

body.dark .message.assistant .message-content h1,
body.dark .message.assistant .message-content h2,
body.dark .message.assistant .message-content h3,
body.dark .message.assistant .message-content h4,
body.dark .message.assistant .message-content h5,
body.dark .message.assistant .message-content h6 {
    color: var(--text);
    border-bottom-color: var(--border);
}

body.dark .message.assistant .message-content strong {
    color: var(--text);
}

body.dark .message.assistant .message-content code {
    background: rgba(255, 255, 255, 0.08);
    color: #fbbf24;
    border-color: var(--border);
}

body.dark .message.assistant .message-content pre {
    background: rgba(255, 255, 255, 0.06);
    border-color: var(--border);
}

body.dark .message.assistant .message-content pre code {
    color: var(--text);
}

body.dark .message.assistant .message-content blockquote {
    background: rgba(255, 255, 255, 0.04);
    border-left-color: var(--primary);
    color: var(--muted);
}

body.dark .message.assistant .message-content table th {
    background: rgba(255, 255, 255, 0.06);
    color: var(--text);
    border-color: var(--border);
}

body.dark .message.assistant .message-content table td {
    border-color: var(--border);
}

body.dark .message.assistant .message-content table tr:nth-child(even) {
    background: rgba(255, 255, 255, 0.02);
}

body.dark .message.assistant .message-content hr {
    border-top-color: var(--border);
}

body.dark .message.assistant .message-content a {
    color: var(--primary);
}

body.dark .message.assistant .message-content a:hover {
    color: var(--primary-600);
    border-bottom-color: var(--primary-600);
}

/* Toast / Notification */
.toast-container {
    position: fixed;
    right: 20px;
    bottom: 20px;
    z-index: 1100;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.toast {
    min-width: 280px;
    max-width: 420px;
    background: var(--surface);
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: 10px;
    box-shadow: var(--shadow);
    padding: 12px 14px;
    display: flex;
    align-items: center;
    gap: 10px;
    animation: fadeIn 0.2s ease;
}

.toast.success { border-left: 4px solid #2f9e44; }
.toast.error { border-left: 4px solid #e03131; }
.toast.info { border-left: 4px solid var(--primary); }

.toast .toast-message { flex: 1; }
.toast .toast-actions { display: flex; gap: 8px; }
.toast .toast-btn {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text);
    padding: 6px 10px;
    border-radius: 6px;
    cursor: pointer;
}
.toast .toast-btn.primary { background: var(--primary); color: #fff; border-color: var(--primary); }
.toast .toast-btn:hover { filter: brightness(1.03); }

/* Centered confirmation modal */
.confirm-modal { display: none; }
.confirm-modal.show { display: block; }
.confirm-backdrop {
    position: fixed; inset: 0; background: rgba(0,0,0,0.5); z-index: 1200;
}
.confirm-card {
    position: fixed; z-index: 1210; left: 50%; top: 50%; transform: translate(-50%, -50%);
    width: 92%; max-width: 460px; background: var(--surface); color: var(--text);
    border: 1px solid var(--border); border-radius: 12px; box-shadow: var(--shadow);
    padding: 18px;
}
.confirm-header h3 { margin: 0 0 8px 0; }
.confirm-body { color: var(--muted); margin-bottom: 12px; }
.confirm-actions { display: flex; justify-content: flex-end; gap: 10px; }
.btn.danger { background: #e03131; border-color: #e03131; }
.btn.danger:hover { filter: brightness(0.95); }

/* Input modal controls */
.text-input {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: transparent;
    color: var(--text);
    outline: none;
}
.text-input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.12);
}