/* ==========================================
   Modern Dark Design System
   ========================================== */
:root {
    /* Dark Color Palette */
    --bg-primary: #0f0f11;
    --bg-secondary: #18181b;
    --bg-tertiary: #27272a;
    --bg-hover: #3f3f46;
    
    /* Accent Colors */
    --accent-primary: #3b82f6;
    --accent-secondary: #8b5cf6;
    --accent-success: #10b981;
    
    /* Text Colors */
    --text-primary: #fafafa;
    --text-secondary: #a1a1aa;
    --text-tertiary: #71717a;
    --text-muted: #52525b;
    
    /* Borders */
    --border-light: rgba(255, 255, 255, 0.06);
    --border-medium: rgba(255, 255, 255, 0.1);
    --border-strong: rgba(255, 255, 255, 0.15);
    
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 4px 16px rgba(0, 0, 0, 0.1);
    
    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 0.75rem;
    --space-lg: 1rem;
    --space-xl: 1.25rem;
    --space-2xl: 1.5rem;
    --space-3xl: 2rem;
    
    /* Border Radius */
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-full: 9999px;
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-base: 0.2s ease;
    --transition-slow: 0.3s ease;
}

/* Light Mode Theme */
[data-theme="light"] {
    --bg-primary: #ffffff;
    --bg-secondary: #f7f7f8;
    --bg-tertiary: #eeeeef;
    --bg-hover: #e4e4e7;
    
    --text-primary: #09090b;
    --text-secondary: #52525b;
    --text-tertiary: #71717a;
    --text-muted: #a1a1aa;
    
    --border-light: rgba(0, 0, 0, 0.06);
    --border-medium: rgba(0, 0, 0, 0.1);
    --border-strong: rgba(0, 0, 0, 0.15);
    
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 4px 16px rgba(0, 0, 0, 0.1);
}

/* ==========================================
   Reset & Base
   ========================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Sora', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    font-size: 14px;
    line-height: 1.5;
    overflow: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-tertiary);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.15);
    border-radius: 4px;
    transition: all var(--transition-fast);
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.25);
}

/* Firefox Scrollbar */
* {
    scrollbar-width: thin;
    scrollbar-color: rgba(255, 255, 255, 0.15) var(--bg-tertiary);
}

/* ==========================================
   Background Effects
   ========================================== */
.bg-gradient {
    position: fixed;
    inset: 0;
    background: radial-gradient(circle at 20% 20%, rgba(59, 130, 246, 0.08) 0%, transparent 50%),
                radial-gradient(circle at 80% 80%, rgba(139, 92, 246, 0.08) 0%, transparent 50%);
    pointer-events: none;
    z-index: 0;
    animation: breathe 8s ease-in-out infinite;
}

@keyframes breathe {
    0%, 100% {
        opacity: 1;
        transform: scale(1);
    }
    50% {
        opacity: 0.8;
        transform: scale(1.05);
    }
}

.bg-grid {
    position: fixed;
    inset: 0;
    background-image: 
        linear-gradient(var(--border-light) 1px, transparent 1px),
        linear-gradient(90deg, var(--border-light) 1px, transparent 1px);
    background-size: 50px 50px;
    pointer-events: none;
    z-index: 0;
    mask-image: radial-gradient(ellipse at center, black 20%, transparent 70%);
}

/* ==========================================
   Page System
   ========================================== */
.page {
    position: relative;
    z-index: 1;
    width: 100%;
    height: 100vh;
    display: none;
    opacity: 0;
}

.page.active {
    display: flex;
    animation: fadeInPage 0.3s ease forwards;
}

@keyframes fadeInPage {
    to {
        opacity: 1;
    }
}

/* ==========================================
   Chat Sidebar
   ========================================== */
.mobile-menu-btn {
    display: none; /* Hidden on desktop */
    width: 40px;
    height: 40px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-medium);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    cursor: pointer;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
    flex-shrink: 0;
}

.mobile-menu-btn:hover {
    background: var(--bg-hover);
    transform: scale(1.05);
}

.mobile-menu-btn.hidden {
    visibility: hidden; /* Still takes space but invisible */
}

@media (max-width: 768px) {
    .mobile-menu-btn {
        display: flex; /* Show on mobile */
    }
}

.chat-sidebar {
    position: fixed;
    left: 0;
    top: 0;
    width: 260px;
    height: 100vh;
    background: var(--bg-secondary);
    border-right: 1px solid var(--border-medium);
    z-index: 50;
    display: flex;
    flex-direction: column;
    transition: width var(--transition-base), transform var(--transition-base);
}

.chat-sidebar.collapsed {
    width: 60px;
}

.sidebar-header {
    padding: var(--space-lg);
    border-bottom: 1px solid var(--border-light);
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: 64px;
}

.sidebar-title {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary);
}

.sidebar-logo-img {
    width: 32px;
    height: 32px;
    object-fit: contain;
}

.sidebar-logo {
    font-size: 18px;
}

.collapse-sidebar-btn {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-medium);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.chat-sidebar.collapsed .collapse-sidebar-btn {
    display: none;
}

.collapse-sidebar-btn:hover {
    background: var(--bg-hover);
    border-color: var(--border-strong);
    color: var(--text-primary);
}

.expand-sidebar-btn {
    position: fixed;
    left: var(--space-lg);
    top: var(--space-lg);
    width: 40px;
    height: 40px;
    display: none;
    align-items: center;
    justify-content: center;
    background: rgba(24, 24, 27, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--border-medium);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
    z-index: 40;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    opacity: 0;
    pointer-events: none;
}

.expand-sidebar-btn:hover {
    background: var(--bg-tertiary);
    border-color: var(--border-strong);
    color: var(--text-primary);
    transform: scale(1.05);
}

/* Mini Sidebar Icons */
.sidebar-nav {
    padding: var(--space-md);
    border-bottom: 1px solid var(--border-light);
    transition: opacity var(--transition-fast);
}

.chat-sidebar.collapsed .sidebar-nav {
    padding: var(--space-sm) 0;
    border-bottom: none;
}

.new-chat-nav-item {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-md) var(--space-lg);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
    font-family: 'Sora', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
    cursor: pointer;
    transition: all var(--transition-fast);
    background: transparent;
    border: 1px solid transparent;
    white-space: nowrap;
}

.chat-sidebar.collapsed .new-chat-nav-item {
    justify-content: center;
    padding: var(--space-md);
    margin: 0 var(--space-sm);
}

.chat-sidebar.collapsed .new-chat-nav-item span {
    display: none;
}

.new-chat-nav-item:hover {
    background: var(--bg-tertiary);
    border-color: var(--border-medium);
    color: var(--text-primary);
}

.new-chat-nav-item svg {
    width: 18px;
    height: 18px;
}

.sidebar-body {
    flex: 1;
    overflow-y: auto;
    padding: var(--space-md);
    transition: opacity var(--transition-fast);
}

.chat-sidebar.collapsed .sidebar-body {
    opacity: 0;
    pointer-events: none;
    overflow: hidden;
}

.sidebar-body::-webkit-scrollbar {
    width: 6px;
}

.sidebar-body::-webkit-scrollbar-track {
    background: transparent;
}

.sidebar-body::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 3px;
}

.sidebar-body::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.15);
}

.chat-history-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.chat-history-item {
    padding: var(--space-md) var(--space-lg);
    background: transparent;
    border: 1px solid transparent;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-sm);
}

.chat-history-item:hover {
    background: var(--bg-tertiary);
    border-color: var(--border-medium);
}

.chat-history-item.active {
    background: var(--bg-tertiary);
    border-color: var(--accent-primary);
}

.chat-item-content {
    flex: 1;
    overflow: hidden;
}

.chat-item-title {
    font-size: 13px;
    font-weight: 500;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-bottom: 2px;
}

.chat-item-preview {
    font-size: 12px;
    color: var(--text-tertiary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.chat-item-actions {
    display: flex;
    gap: var(--space-xs);
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.chat-history-item:hover .chat-item-actions {
    opacity: 1;
}

.chat-item-action {
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: none;
    color: var(--text-tertiary);
    cursor: pointer;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
    flex-shrink: 0;
}

.chat-item-action:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

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

.empty-history {
    text-align: center;
    padding: var(--space-3xl) var(--space-md);
    color: var(--text-tertiary);
    font-size: 13px;
}

.sidebar-footer {
    padding: var(--space-md);
    border-top: 1px solid var(--border-light);
    margin-top: auto;
}

.chat-sidebar.collapsed .sidebar-footer {
    padding: var(--space-sm) 0;
}

.footer-item {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-md) var(--space-lg);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-size: 13px;
    font-weight: 500;
    font-family: 'Sora', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.chat-sidebar.collapsed .footer-item {
    justify-content: center;
    padding: var(--space-md);
    margin: 0 var(--space-sm);
}

.chat-sidebar.collapsed .footer-item span {
    display: none;
}

.footer-item:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.footer-item svg {
    width: 16px;
    height: 16px;
}

/* ==========================================
   Chat Container
   ========================================== */
.chat-container {
    width: calc(100% - 260px);
    height: 100vh;
    display: flex;
    flex-direction: column;
    margin-left: 260px;
    background: var(--bg-primary);
    transition: margin-left var(--transition-base), width var(--transition-base);
}

.chat-sidebar.collapsed ~ .chat-container {
    margin-left: 60px;
    width: calc(100% - 60px);
}

/* ==========================================
   Chat Body & Messages
   ========================================== */
.chat-body {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    position: relative;
}

.chat-body::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 30% 40%, rgba(59, 130, 246, 0.15) 0%, transparent 50%),
                radial-gradient(circle at 70% 60%, rgba(139, 92, 246, 0.15) 0%, transparent 50%);
    pointer-events: none;
    z-index: 0;
    animation: breatheChat 8s ease-in-out infinite;
}

.chat-body::after {
    content: '';
    position: absolute;
    inset: 0;
    background-image: 
        linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
    background-size: 40px 40px;
    pointer-events: none;
    z-index: 0;
    opacity: 0.5;
}

@keyframes breatheChat {
    0%, 100% {
        opacity: 0.6;
        transform: scale(1);
    }
    50% {
        opacity: 1;
        transform: scale(1.15);
    }
}

.chat-title-bar {
    padding: var(--space-lg) var(--space-xl);
    position: relative;
    z-index: 1;
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.chat-bot-name {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
    font-family: 'Sora', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
    letter-spacing: -0.01em;
    margin: 0;
}

.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: var(--space-3xl) var(--space-xl);
    display: flex;
    flex-direction: column;
    gap: var(--space-2xl);
    scroll-behavior: smooth;
    width: 100%;
    max-width: 800px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.chat-messages::-webkit-scrollbar {
    width: 6px;
}

.chat-messages::-webkit-scrollbar-track {
    background: transparent;
}

.chat-messages::-webkit-scrollbar-thumb {
    background: var(--border-medium);
    border-radius: 3px;
}

.chat-messages::-webkit-scrollbar-thumb:hover {
    background: var(--border-strong);
}

/* Welcome Message */
.welcome-message {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: var(--space-lg);
    padding: var(--space-3xl) var(--space-lg);
    margin: auto 0;
}

.welcome-icon {
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.welcome-icon img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.welcome-message h2 {
    font-size: 22px;
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: -0.01em;
}

.welcome-message p {
    font-size: 14px;
    color: var(--text-secondary);
    max-width: 400px;
    line-height: 1.6;
}

/* Message Wrapper */
.message-wrapper {
    display: flex;
    animation: slideIn 0.3s ease;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(6px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.ai-wrapper {
    justify-content: flex-start;
}

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

.message {
    max-width: 75%;
    padding: var(--space-lg) var(--space-xl);
    border-radius: var(--radius-xl);
    font-size: 14px;
    line-height: 1.6;
    position: relative;
}

.ai-message {
    background: var(--bg-secondary);
    border: 1px solid var(--border-medium);
    color: var(--text-primary);
}

.user-message {
    background: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-secondary) 100%);
    color: white;
    font-weight: 400;
}

.message p {
    margin: 0;
}

.message p + p {
    margin-top: var(--space-md);
}

/* ==========================================
   Typing Indicator
   ========================================== */
.typing-indicator {
    display: none;
    padding: 0 var(--space-xl);
    animation: slideIn 0.3s ease;
    max-width: 800px;
    width: 100%;
    margin: 0 auto;
}

.typing-indicator.active {
    display: block;
}

.typing-dots {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: var(--space-lg) var(--space-xl);
    background: var(--bg-secondary);
    border: 1px solid var(--border-medium);
    border-radius: var(--radius-xl);
}

.typing-dots span {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--accent-primary);
    animation: typingBounce 1.4s infinite ease-in-out;
}

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

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

@keyframes typingBounce {
    0%, 60%, 100% {
        transform: translateY(0);
        opacity: 0.4;
    }
    30% {
        transform: translateY(-4px);
        opacity: 1;
    }
}

/* ==========================================
   Chat Input (Centered)
   ========================================== */
.chat-input-container {
    padding: 0 var(--space-xl) var(--space-3xl);
    position: relative;
    z-index: 10;
    max-width: 800px;
    width: 100%;
    margin: 0 auto;
}

.input-wrapper {
    display: flex;
    align-items: flex-end;
    gap: var(--space-sm);
    background: var(--bg-secondary);
    border: 1px solid var(--border-medium);
    border-radius: var(--radius-xl);
    padding: var(--space-md);
    transition: all var(--transition-fast);
    position: relative;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.input-wrapper:focus-within {
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.attach-btn {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: none;
    color: var(--text-tertiary);
    cursor: pointer;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
    flex-shrink: 0;
}

.attach-btn:hover {
    background: var(--bg-tertiary);
    color: var(--text-secondary);
}

#chatInput {
    flex: 1;
    background: transparent;
    border: none;
    outline: none;
    color: var(--text-primary);
    font-size: 14px;
    font-family: inherit;
    resize: none;
    max-height: 120px;
    line-height: 1.5;
    padding: 6px 4px;
}

#chatInput::placeholder {
    color: var(--text-tertiary);
}

.send-btn {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #8b5cf6;
    border: none;
    border-radius: var(--radius-md);
    color: white;
    cursor: pointer;
    transition: all var(--transition-fast);
    flex-shrink: 0;
}

.send-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.send-btn:not(:disabled):hover {
    transform: scale(1.05);
    box-shadow: 0 4px 12px rgba(139, 92, 246, 0.4);
    background: #9b6cf6;
}

.send-btn:not(:disabled):active {
    transform: scale(0.95);
}

.input-hint {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    margin-top: var(--space-md);
    padding: 0 var(--space-sm);
    font-size: 11px;
    color: var(--text-muted);
    line-height: 1.4;
    text-align: center;
}

.input-hint svg {
    flex-shrink: 0;
    opacity: 0.6;
}

/* ==========================================
   Onboarding Flow
   ========================================== */
.onboarding-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(8px);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 300;
    padding: var(--space-lg);
}

.onboarding-overlay.active {
    display: flex;
}

.onboarding-modal {
    display: none;
    animation: modalSlideIn 0.3s ease;
}

.onboarding-modal.active {
    display: block;
}

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

.onboarding-content {
    max-width: 480px;
    width: 100%;
    padding: var(--space-3xl);
    background: var(--bg-primary);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    text-align: center;
}

.onboarding-icon {
    width: 72px;
    height: 72px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-secondary);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-xl);
    margin: 0 auto var(--space-xl);
}

.onboarding-content h2 {
    font-size: 24px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-md);
    letter-spacing: -0.01em;
}

.onboarding-content p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: var(--space-xl);
}

.onboarding-features {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
    margin-bottom: var(--space-xl);
    text-align: left;
}

.feature-item {
    display: flex;
    align-items: flex-start;
    gap: var(--space-md);
}

.feature-number {
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--accent-primary);
    color: white;
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: 13px;
    flex-shrink: 0;
}

.feature-item p {
    margin: 0;
    padding-top: 4px;
    font-size: 14px;
}

.safety-info {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    margin-bottom: var(--space-xl);
    text-align: left;
}

.safety-item {
    display: flex;
    align-items: flex-start;
    gap: var(--space-md);
    padding: var(--space-md);
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.3);
    border-radius: var(--radius-md);
}

.safety-item svg {
    flex-shrink: 0;
    margin-top: 2px;
}

.safety-item p {
    margin: 0;
    font-size: 13px;
    color: var(--text-secondary);
}

.api-instruction {
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: var(--space-xl);
    line-height: 1.6;
}

.api-instruction a {
    color: var(--accent-primary);
    text-decoration: none;
    font-weight: 500;
}

.api-instruction a:hover {
    text-decoration: underline;
}

.onboarding-input-group {
    text-align: left;
    margin-bottom: var(--space-xl);
}

.onboarding-input-group label {
    display: block;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: var(--space-sm);
}

.input-with-icon {
    position: relative;
    display: flex;
    align-items: center;
}

.onboarding-input {
    width: 100%;
    padding: 11px 40px 11px 12px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 14px;
    font-family: inherit;
    transition: all var(--transition-fast);
}

.onboarding-input:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.toggle-visibility-btn {
    position: absolute;
    right: 8px;
    width: 28px;
    height: 28px;
    background: none;
    border: none;
    color: var(--text-tertiary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.toggle-visibility-btn:hover {
    background: var(--bg-hover);
    color: var(--text-secondary);
}

/* Checkbox */
.checkbox-label {
    display: inline-flex;
    flex-direction: row;
    align-items: center;
    gap: var(--space-md);
    margin-top: var(--space-lg);
    cursor: pointer;
    user-select: none;
    padding: var(--space-md);
    border-radius: var(--radius-md);
    transition: background var(--transition-fast);
    white-space: nowrap;
}

.checkbox-label:hover {
    background: rgba(59, 130, 246, 0.05);
}

.checkbox-label input[type="checkbox"] {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}

.checkbox-custom {
    width: 20px;
    height: 20px;
    min-width: 20px;
    border: 2px solid var(--border-strong);
    border-radius: 5px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-base);
    flex-shrink: 0;
    background: var(--bg-tertiary);
}

.checkbox-label input[type="checkbox"]:checked + .checkbox-custom {
    background: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-secondary) 100%);
    border-color: transparent;
}

.checkbox-label input[type="checkbox"]:checked + .checkbox-custom::after {
    content: '';
    width: 10px;
    height: 6px;
    border-left: 2px solid white;
    border-bottom: 2px solid white;
    transform: rotate(-45deg) translateY(-1px);
}

.checkbox-text {
    font-size: 14px;
    color: var(--text-primary);
    line-height: 1.4;
}

.checkbox-label:hover .checkbox-custom {
    border-color: var(--accent-primary);
}

.onboarding-btn {
    padding: 12px 24px;
    border: none;
    border-radius: var(--radius-md);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    width: 100%;
}

.onboarding-btn.primary {
    background: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-secondary) 100%);
    color: white;
}

.onboarding-btn.primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(59, 130, 246, 0.4);
}

.onboarding-btn.secondary {
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    border: 1px solid var(--border-medium);
    margin-bottom: var(--space-sm);
}

.onboarding-btn.secondary:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.onboarding-buttons {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

/* Page Indicators */
.page-indicators {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    margin-top: var(--space-xl);
}

.page-indicator {
    width: 8px;
    height: 8px;
    border-radius: var(--radius-full);
    background: var(--border-medium);
    transition: all var(--transition-base);
}

.page-indicator.active {
    width: 24px;
    background: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-secondary) 100%);
}

/* Old Settings Panel CSS removed - replaced with Settings Modal below */

/* ==========================================
   Settings Modal (New Centered Style)
   ========================================== */
.settings-modal {
    position: fixed;
    inset: 0;
    z-index: 200;
    display: none;
    align-items: center;
    justify-content: center;
}

.settings-modal.active {
    display: flex;
}

.settings-modal-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(4px);
}

.settings-modal-container {
    position: relative;
    width: 90%;
    max-width: 900px;
    max-height: 85vh;
    background: var(--bg-primary);
    border-radius: 16px;
    border: 1px solid var(--border-medium);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
    display: flex;
    overflow: hidden;
    animation: modalSlideIn 0.3s ease;
}

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

.settings-close-btn {
    position: absolute;
    top: 16px;
    right: 16px;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-medium);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
    z-index: 10;
}

.settings-close-btn:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
    transform: scale(1.05);
}

.settings-sidebar {
    width: 240px;
    background: var(--bg-secondary);
    border-right: 1px solid var(--border-medium);
    padding: var(--space-2xl);
    display: flex;
    flex-direction: column;
    gap: var(--space-xl);
}

.settings-sidebar h2 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.settings-nav {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.settings-nav-item {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-md) var(--space-lg);
    background: transparent;
    border: none;
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
    font-family: 'Sora', sans-serif;
    cursor: pointer;
    transition: all var(--transition-fast);
    text-align: left;
}

.settings-nav-item:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.settings-nav-item.active {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.settings-content-area {
    flex: 1;
    overflow-y: auto;
    padding: var(--space-3xl);
}

.settings-tab {
    display: none;
}

.settings-tab.active {
    display: block;
}

.settings-tab h3 {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 var(--space-2xl) 0;
}

.setting-row {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: var(--space-2xl);
    padding: var(--space-xl) 0;
    border-bottom: 1px solid var(--border-light);
}

.setting-row:last-child {
    border-bottom: none;
}

.setting-info {
    flex: 1;
}

.setting-info label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: var(--space-xs);
}

.setting-info p {
    font-size: 13px;
    color: var(--text-tertiary);
    margin: 0;
}

.setting-control {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.setting-input-field,
.setting-select-field,
.setting-textarea-field {
    width: 100%;
    padding: var(--space-md) var(--space-lg);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-medium);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 14px;
    font-family: 'Sora', sans-serif;
    transition: all var(--transition-fast);
}

.setting-input-field:focus,
.setting-select-field:focus,
.setting-textarea-field:focus {
    outline: none;
    border-color: var(--accent-primary);
    background: var(--bg-secondary);
}

.setting-save-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-xl);
    background: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-secondary) 100%);
    border: none;
    border-radius: var(--radius-md);
    color: white;
    font-size: 14px;
    font-weight: 500;
    font-family: 'Sora', sans-serif;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.setting-save-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(59, 130, 246, 0.4);
}

/* About Tab Styles */
.about-info {
    margin-bottom: var(--space-2xl);
}

.about-row {
    display: flex;
    justify-content: space-between;
    padding: var(--space-lg);
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-sm);
}

.about-label {
    font-size: 14px;
    color: var(--text-tertiary);
}

.about-value {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
}

.about-description {
    padding: var(--space-xl);
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-2xl);
}

.about-description p {
    margin: 0;
    font-size: 14px;
    line-height: 1.6;
    color: var(--text-secondary);
}

.safety-notice {
    display: flex;
    gap: var(--space-md);
    padding: var(--space-xl);
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.3);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-2xl);
}

.safety-icon {
    flex-shrink: 0;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(16, 185, 129, 0.2);
    border-radius: var(--radius-md);
    color: var(--accent-success);
}

.safety-notice p {
    margin: 0;
    font-size: 13px;
    line-height: 1.5;
    color: var(--text-secondary);
}

.emergency-buttons {
    display: flex;
    gap: var(--space-md);
}

.emergency-btn {
    flex: 1;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-lg);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-medium);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 14px;
    font-weight: 500;
    text-decoration: none;
    transition: all var(--transition-fast);
}

.emergency-btn:hover {
    background: var(--bg-hover);
    border-color: var(--border-strong);
    transform: translateY(-2px);
}

/* Responsive */
@media (max-width: 768px) {
    .mobile-menu-btn {
        display: flex;
    }
    
    .chat-sidebar {
        width: 240px;
        transform: translateX(-100%);
        box-shadow: var(--shadow-lg);
    }
    
    .chat-sidebar:not(.collapsed) {
        transform: translateX(0);
    }
    
    .chat-sidebar.collapsed {
        transform: translateX(-100%);
        width: 0;
    }
    
    .chat-container {
        margin-left: 0;
        width: 100%;
    }
    
    .settings-modal-container {
        width: 95%;
        max-height: 90vh;
        flex-direction: column;
    }
    
    .settings-sidebar {
        width: 100%;
        padding: var(--space-lg);
    }
    
    .settings-nav {
        flex-direction: row;
        overflow-x: auto;
    }
    
    .settings-content-area {
        padding: var(--space-lg);
    }
    
    .setting-row {
        flex-direction: column;
        gap: var(--space-lg);
    }
    
    .emergency-buttons {
        flex-direction: column;
    }
}

/* Data Management Styles */
.data-management-section {
    display: flex;
    flex-direction: column;
    gap: var(--space-2xl);
}

.data-info {
    padding: var(--space-xl);
    background: var(--bg-secondary);
    border: 1px solid var(--border-medium);
    border-radius: var(--radius-lg);
}

.data-info.danger {
    background: rgba(239, 68, 68, 0.05);
    border-color: rgba(239, 68, 68, 0.2);
}

.data-info h4 {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 var(--space-sm) 0;
}

.data-info p {
    font-size: 14px;
    color: var(--text-secondary);
    margin: 0 0 var(--space-lg) 0;
    line-height: 1.5;
}

.data-action-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-xl);
    border: none;
    border-radius: var(--radius-md);
    font-size: 14px;
    font-weight: 500;
    font-family: 'Sora', sans-serif;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.data-action-btn.export {
    background: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-secondary) 100%);
    color: white;
}

.data-action-btn.export:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(59, 130, 246, 0.4);
}

.data-action-btn.delete {
    background: rgba(239, 68, 68, 0.1);
    color: #ef4444;
    border: 1px solid rgba(239, 68, 68, 0.3);
}

.data-action-btn.delete:hover {
    background: rgba(239, 68, 68, 0.15);
    border-color: rgba(239, 68, 68, 0.5);
    transform: translateY(-2px);
}

.data-stats {
    padding: var(--space-xl);
    background: var(--bg-secondary);
    border: 1px solid var(--border-medium);
    border-radius: var(--radius-lg);
}

.data-stats h4 {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 var(--space-lg) 0;
}

.stat-row {
    display: flex;
    justify-content: space-between;
    padding: var(--space-md) 0;
    border-bottom: 1px solid var(--border-light);
}

.stat-row:last-child {
    border-bottom: none;
}

.stat-label {
    font-size: 14px;
    color: var(--text-secondary);
}

.stat-value {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
}

/* ==========================================
   Confirmation Modal
   ========================================== */
.confirm-modal {
    position: fixed;
    inset: 0;
    z-index: 300;
    display: none;
    align-items: center;
    justify-content: center;
}

.confirm-modal.active {
    display: flex;
}

.confirm-modal-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(4px);
}

.confirm-modal-container {
    position: relative;
    width: 90%;
    max-width: 400px;
    background: var(--bg-primary);
    border-radius: 16px;
    border: 1px solid var(--border-medium);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
    padding: var(--space-3xl);
    text-align: center;
    animation: modalSlideIn 0.3s ease;
}

.confirm-modal-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--space-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(239, 68, 68, 0.1);
    border-radius: var(--radius-full);
    color: #ef4444;
}

.confirm-modal-title {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 var(--space-md) 0;
}

.confirm-modal-message {
    font-size: 14px;
    color: var(--text-secondary);
    margin: 0 0 var(--space-2xl) 0;
    line-height: 1.5;
}

.confirm-modal-actions {
    display: flex;
    gap: var(--space-md);
}

.confirm-btn {
    flex: 1;
    padding: var(--space-md) var(--space-xl);
    border: none;
    border-radius: var(--radius-md);
    font-size: 14px;
    font-weight: 500;
    font-family: 'Sora', sans-serif;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.confirm-btn-cancel {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-medium);
}

.confirm-btn-cancel:hover {
    background: var(--bg-hover);
}

.confirm-btn-confirm {
    background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
    color: white;
}

.confirm-btn-confirm:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(239, 68, 68, 0.4);
}

/* Rename Modal Input */
.rename-input {
    width: 100%;
    padding: var(--space-md) var(--space-lg);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-medium);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 14px;
    font-family: 'Sora', sans-serif;
    margin-bottom: var(--space-xl);
    transition: all var(--transition-fast);
}

.rename-input:focus {
    outline: none;
    border-color: var(--accent-primary);
    background: var(--bg-secondary);
}

.confirm-btn-primary {
    background: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-secondary) 100%);
    color: white;
}

.confirm-btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(59, 130, 246, 0.4);
}

/* Onboarding Skip Link */
.onboarding-skip-link {
    display: block;
    width: fit-content;
    margin: var(--space-md) auto 0;
    padding: var(--space-sm);
    background: none;
    border: none;
    color: var(--text-tertiary);
    font-size: 13px;
    font-family: 'Sora', sans-serif;
    cursor: pointer;
    transition: color var(--transition-fast);
}

.onboarding-skip-link:hover {
    color: var(--text-secondary);
    text-decoration: underline;
}

/* Success Modal Styling */
.success-icon {
    background: rgba(16, 185, 129, 0.1) !important;
    color: #10b981 !important;
}

.confirm-btn-success {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    color: white;
}

.confirm-btn-success:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(16, 185, 129, 0.4);
}