/* Enhanced AI Cancer Assistant - Complete CSS Framework */
/* Production-ready styles with modern chat interface and text-based interaction */
/* Version 2.0.0 */

/* CSS Custom Properties (Variables) - Enhanced */
:root {
    /* Enhanced Dark Theme Color Palette */
    --bg-primary: #0f0f23;
    --bg-secondary: #1a1a2e;
    --bg-tertiary: #16213e;
    --bg-quaternary: #0f3460;
    --bg-chat: #1e1e1e;
    --bg-message: #2a2a2a;
    --bg-user: #007acc;
    --bg-assistant: #2d2d30;
    --bg-input: #252526;
    --bg-sidebar: #1e1e1e;
    --bg-card: #2d2d30;
    --bg-surface: #333333;
    --bg-overlay: rgba(15, 15, 35, 0.95);
    --bg-toast: #2d2d30;
    --bg-modal: #1a1a2e;
    
    /* Text Colors */
    --text-primary: #ffffff;
    --text-secondary: #cccccc;
    --text-muted: #888888;
    --text-dimmed: #666666;
    --text-placeholder: #999999;
    --text-disabled: #555555;
    --text-inverse: #000000;
    
    /* Enhanced Accent Colors */
    --accent-primary: #007acc;
    --accent-secondary: #0099ff;
    --accent-success: #4caf50;
    --accent-warning: #ff9800;
    --accent-error: #f44336;
    --accent-info: #2196f3;
    --accent-hover: #0056b3;
    --accent-light: rgba(0, 122, 204, 0.1);
    --accent-medium: rgba(0, 122, 204, 0.3);
    --accent-strong: rgba(0, 122, 204, 0.8);
    
    /* Border Colors */
    --border-primary: #333333;
    --border-secondary: #404040;
    --border-accent: #007acc;
    --border-light: #555555;
    --border-success: #4caf50;
    --border-warning: #ff9800;
    --border-error: #f44336;
    --border-focus: rgba(0, 122, 204, 0.5);
    
    /* Enhanced Shadow Definitions */
    --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.2);
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.5);
    --shadow-xl: 0 12px 24px rgba(0, 0, 0, 0.6);
    --shadow-2xl: 0 16px 32px rgba(0, 0, 0, 0.7);
    --shadow-input: 0 4px 15px rgba(0, 123, 255, 0.2);
    --shadow-input-focus: 0 8px 25px rgba(0, 123, 255, 0.3);
    --shadow-inset: inset 0 2px 4px rgba(0, 0, 0, 0.3);
    --shadow-glow: 0 0 20px rgba(0, 122, 204, 0.3);
    
    /* Border Radius */
    --radius-xs: 4px;
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-2xl: 20px;
    --radius-3xl: 24px;
    --radius-full: 50%;
    
    /* Enhanced Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    --transition-bounce: 0.3s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    --transition-smooth: 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    --transition-spring: 0.6s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    --transition-elastic: 0.8s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    
    /* Typography Scale */
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.8rem;
    --font-size-base: 0.9rem;
    --font-size-lg: 1rem;
    --font-size-xl: 1.1rem;
    --font-size-2xl: 1.25rem;
    --font-size-3xl: 1.5rem;
    --font-size-4xl: 1.875rem;
    --font-size-5xl: 2.25rem;
    
    /* Spacing Scale */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 0.75rem;
    --spacing-lg: 1rem;
    --spacing-xl: 1.5rem;
    --spacing-2xl: 2rem;
    --spacing-3xl: 3rem;
    --spacing-4xl: 4rem;
    
    /* Layout Dimensions */
    --sidebar-width: 400px;
    --header-height: 70px;
    --input-area-height: auto;
    --input-area-max-height: 200px;
    --avatar-size: 36px;
    --toast-width: 400px;
    
    /* Z-Index Scale */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-popover: 1060;
    --z-tooltip: 1070;
    --z-toast: 2000;
    --z-loading: 2010;
    
    /* Animation Durations */
    --duration-instant: 0ms;
    --duration-fast: 150ms;
    --duration-normal: 300ms;
    --duration-slow: 500ms;
    --duration-slower: 750ms;
    --duration-slowest: 1000ms;
}

/* Reset and Base Styles - Enhanced */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

*::before,
*::after {
    box-sizing: border-box;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
    height: 100%;
    -webkit-text-size-adjust: 100%;
    -ms-text-size-adjust: 100%;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow: hidden;
    font-size: var(--font-size-base);
    height: 100vh;
    font-feature-settings: "kern" 1, "liga" 1;
    text-rendering: optimizeLegibility;
    font-variant-numeric: tabular-nums;
}

/* Enhanced App Container */
.app-container {
    height: 100vh;
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
}

/* Enhanced Chat Header */
.chat-header {
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-primary);
    padding: var(--spacing-lg) var(--spacing-xl);
    position: sticky;
    top: 0;
    z-index: var(--z-sticky);
    backdrop-filter: blur(10px);
    height: var(--header-height);
    display: flex;
    align-items: center;
    box-shadow: var(--shadow-sm);
    border-bottom: 2px solid transparent;
    background-image: linear-gradient(var(--bg-secondary), var(--bg-secondary)), 
                      linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
    background-origin: border-box;
    background-clip: padding-box, border-box;
}

.chat-header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1400px;
    margin: 0 auto;
    width: 100%;
}

.chat-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.logo-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: var(--font-size-lg);
    box-shadow: var(--shadow-md);
    transition: var(--transition-spring);
    position: relative;
    overflow: hidden;
}

.logo-icon::before {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    background: linear-gradient(45deg, var(--accent-primary), var(--accent-secondary), var(--accent-primary));
    border-radius: var(--radius-lg);
    z-index: -1;
    animation: logoGlow 3s ease-in-out infinite alternate;
}

@keyframes logoGlow {
    0% { opacity: 0.5; transform: scale(1); }
    100% { opacity: 0.8; transform: scale(1.05); }
}

.logo-icon:hover {
    transform: scale(1.1) rotate(5deg);
    box-shadow: var(--shadow-lg);
}

.logo-text h1 {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
    background: linear-gradient(135deg, var(--text-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.025em;
}

.logo-subtitle {
    font-size: var(--font-size-xs);
    color: var(--accent-primary);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-top: 2px;
    opacity: 0.8;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.status-button {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    cursor: pointer;
    transition: var(--transition-normal);
    font-family: inherit;
}

.status-button:hover {
    background: var(--bg-quaternary);
    border-color: var(--border-secondary);
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: var(--radius-full);
    background: var(--accent-warning);
    animation: pulse 2s infinite;
    box-shadow: 0 0 10px rgba(255, 152, 0, 0.5);
}

.status-dot.ready {
    background: var(--accent-success);
    animation: none;
    box-shadow: 0 0 10px rgba(76, 175, 80, 0.5);
}

.status-dot.error {
    background: var(--accent-error);
    animation: none;
    box-shadow: 0 0 10px rgba(244, 67, 54, 0.5);
}

.mobile-sidebar-toggle {
    display: none;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-primary);
    color: var(--text-primary);
    font-size: var(--font-size-lg);
    cursor: pointer;
    padding: var(--spacing-sm);
    border-radius: var(--radius-md);
    transition: var(--transition-fast);
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.mobile-sidebar-toggle:hover {
    background: var(--bg-quaternary);
    transform: scale(1.05);
    box-shadow: var(--shadow-sm);
}

.mobile-sidebar-toggle:active {
    transform: scale(0.95);
}

/* Main Container */
.main-container {
    display: flex;
    flex: 1;
    overflow: hidden;
    height: calc(100vh - var(--header-height));
    position: relative;
}

/* Enhanced Chat Area */
.chat-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    background: var(--bg-chat);
    position: relative;
    min-width: 0;
    overflow: hidden;
}

/* Enhanced Messages Container */
.messages-container {
    flex: 1;
    overflow-y: auto;
    margin-bottom: 200px;
    overflow-x: hidden;
    padding: var(--spacing-xl);
    padding-bottom: var(--spacing-4xl);
    scroll-behavior: smooth;
    position: relative;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: thin;
    scrollbar-color: var(--border-primary) transparent;
    scroll-padding-top: 20px;
    background: linear-gradient(180deg, var(--bg-chat) 0%, rgba(30, 30, 30, 0.95) 100%);
}

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

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

.messages-container::-webkit-scrollbar-thumb {
    background: var(--border-primary);
    border-radius: var(--radius-sm);
    transition: var(--transition-fast);
}

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

/* Enhanced Message Styles */
.message {
    display: flex;
    margin-bottom: var(--spacing-xl);
    max-width: 100%;
    animation: messageSlideIn 0.5s ease-out;
    position: relative;
    align-items: flex-start;
    will-change: transform, opacity;
    opacity: 0;
    transform: translateY(20px);
}

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

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

.message.welcome-message {
    margin-bottom: var(--spacing-3xl);
    opacity: 1;
    transform: none;
}

/* Enhanced Message Avatar */
.message-avatar {
    width: var(--avatar-size);
    height: var(--avatar-size);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    margin: 0 var(--spacing-md);
    font-size: var(--font-size-base);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
    border: 2px solid transparent;
}

.message-avatar::before {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    background: inherit;
    border-radius: inherit;
    opacity: 0;
    transition: opacity var(--transition-fast);
    z-index: -1;
}

.message-avatar:hover {
    transform: scale(1.1);
    box-shadow: var(--shadow-lg);
}

.message-avatar:hover::before {
    opacity: 0.2;
}

.message.user .message-avatar {
    background: linear-gradient(135deg, var(--bg-user), var(--accent-secondary));
    color: white;
    border-color: rgba(255, 255, 255, 0.2);
}

.message.assistant .message-avatar {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: white;
    border-color: rgba(255, 255, 255, 0.2);
}

/* Enhanced Message Content */
.message-content {
    max-width: 75%;
    padding: var(--spacing-lg) var(--spacing-xl);
    border-radius: var(--radius-xl);
    position: relative;
    word-wrap: break-word;
    word-break: break-word;
    line-height: 1.7;
    font-size: var(--font-size-base);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
    backdrop-filter: blur(10px);
    border: 1px solid transparent;
}

.message.user .message-content {
    background: linear-gradient(135deg, var(--bg-user), var(--accent-secondary));
    color: white;
    border-bottom-right-radius: var(--radius-md);
    margin-left: auto;
    border-color: rgba(255, 255, 255, 0.1);
    box-shadow: var(--shadow-lg);
}

.message.assistant .message-content {
    background: var(--bg-message);
    color: var(--text-primary);
    border: 1px solid var(--border-primary);
    border-bottom-left-radius: var(--radius-md);
    position: relative;
}

.message.assistant .message-content::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
    border-radius: var(--radius-xl) var(--radius-xl) 0 0;
}

.message-content:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl);
}

.message-content.long-message {
    max-width: 85%;
}

/* Welcome Message Enhancements */
.welcome-content {
    text-align: center;
}

.welcome-content h2 {
    color: var(--accent-primary);
    margin-bottom: var(--spacing-lg);
    font-size: var(--font-size-2xl);
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
}

.welcome-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
    margin: var(--spacing-xl) 0;
    padding: var(--spacing-lg);
    background: var(--bg-tertiary);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-primary);
}

.feature-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
    background: var(--bg-quaternary);
    border-radius: var(--radius-md);
    transition: var(--transition-normal);
}

.feature-item:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.feature-item i {
    color: var(--accent-primary);
    font-size: var(--font-size-lg);
    flex-shrink: 0;
}

.initialization-status {
    margin-top: var(--spacing-xl);
    padding: var(--spacing-lg);
    background: var(--bg-tertiary);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-primary);
}

.progress-bar {
    width: 100%;
    height: 6px;
    background: var(--bg-quaternary);
    border-radius: var(--radius-sm);
    overflow: hidden;
    margin-bottom: var(--spacing-sm);
    position: relative;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
    width: 0%;
    transition: width 2s ease-out;
    border-radius: var(--radius-sm);
    position: relative;
}

.progress-fill::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    animation: shimmer 2s infinite;
}

@keyframes shimmer {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

.progress-text {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    font-weight: 500;
    text-align: center;
}

/* Message Timestamp */
.message-timestamp {
    position: absolute;
    bottom: -24px;
    font-size: var(--font-size-xs);
    color: var(--text-muted);
    opacity: 0;
    transition: opacity var(--transition-fast);
    pointer-events: none;
    font-variant-numeric: tabular-nums;
}

.message.user .message-timestamp {
    right: 0;
}

.message.assistant .message-timestamp {
    left: calc(var(--avatar-size) + var(--spacing-md) + var(--spacing-sm));
}

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

/* Enhanced Message Content Formatting */
.message-content h1,
.message-content h2,
.message-content h3,
.message-content h4,
.message-content h5,
.message-content h6 {
    margin-bottom: var(--spacing-md);
    font-weight: 600;
    line-height: 1.3;
}

.message-content h1 { 
    font-size: var(--font-size-2xl); 
    color: var(--accent-primary); 
}
.message-content h2 { 
    font-size: var(--font-size-xl); 
    color: var(--accent-secondary); 
}
.message-content h3 { 
    font-size: var(--font-size-lg); 
    color: var(--text-primary); 
}
.message-content h4 { 
    font-size: var(--font-size-base); 
    color: var(--text-secondary); 
}

.message-content p {
    margin-bottom: var(--spacing-md);
    font-size: var(--font-size-base);
}

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

.message-content ul,
.message-content ol {
    margin-left: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
    padding-left: var(--spacing-sm);
}

.message-content li {
    margin-bottom: var(--spacing-xs);
    font-size: var(--font-size-base);
}

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

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

.message-content code {
    background: var(--bg-tertiary);
    padding: 0.2em 0.4em;
    border-radius: var(--radius-xs);
    font-family: 'Monaco', 'Menlo', 'Consolas', monospace;
    font-size: 0.85em;
    border: 1px solid var(--border-primary);
}

.message-content pre {
    background: var(--bg-tertiary);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    overflow-x: auto;
    margin: var(--spacing-md) 0;
    border: 1px solid var(--border-primary);
}

.message-content pre code {
    background: none;
    padding: 0;
    border: none;
}

.message-content a {
    color: var(--accent-secondary);
    text-decoration: none;
    transition: var(--transition-fast);
    border-bottom: 1px solid transparent;
}

.message-content a:hover {
    text-decoration: none;
    border-bottom-color: var(--accent-secondary);
    color: var(--accent-primary);
}

.message-content blockquote {
    border-left: 4px solid var(--accent-primary);
    padding-left: var(--spacing-lg);
    margin: var(--spacing-md) 0;
    font-style: italic;
    color: var(--text-secondary);
    background: var(--accent-light);
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

/* ENHANCED INPUT SYSTEM - Modern Chat Interface */

/* Input Area (Fixed at bottom with modern design) */
.input-area {
    position: fixed;
    bottom: 0;
    left: 0;
    right: var(--sidebar-width);
    background: var(--bg-input);
    border-top: 1px solid var(--border-primary);
    z-index: var(--z-fixed);
    backdrop-filter: blur(20px);
    box-shadow: var(--shadow-2xl);
    transition: var(--transition-normal);
}

.input-wrapper {
    padding: var(--spacing-lg) var(--spacing-xl);
    max-width: 1000px;
    margin: 0 auto;
    position: relative;
}

/* Smart Input Hints */
.input-hint-container {
    background: linear-gradient(135deg, rgba(0, 122, 204, 0.1), rgba(0, 153, 255, 0.05));
    border: 1px solid rgba(0, 122, 204, 0.3);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    display: none;
    align-items: center;
    justify-content: space-between;
    animation: slideInUp 0.3s ease-out;
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
}

.input-hint-content {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    flex: 1;
}

.input-hint-content i {
    color: var(--accent-secondary);
    font-size: var(--font-size-lg);
    flex-shrink: 0;
}

.input-hint-content span {
    font-size: var(--font-size-sm);
    color: var(--accent-primary);
    font-weight: 500;
}

.hint-close {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: var(--spacing-xs);
    border-radius: var(--radius-sm);
    transition: var(--transition-fast);
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hint-close:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
}

/* Processing Status */
.processing-status {
    display: none;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--bg-secondary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-md);
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    animation: fadeIn 0.3s ease-out;
    box-shadow: var(--shadow-sm);
}

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

.typing-dot {
    width: 6px;
    height: 6px;
    border-radius: var(--radius-full);
    background: var(--accent-primary);
    animation: typing 1.4s infinite ease-in-out;
}

.typing-dot:nth-child(1) { animation-delay: -0.32s; }
.typing-dot:nth-child(2) { animation-delay: -0.16s; }
.typing-dot:nth-child(3) { animation-delay: 0s; }

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

.status-text {
    font-weight: 500;
    color: var(--accent-primary);
}

/* Enhanced Input Container */
.input-container {
    background: var(--bg-secondary);
    border: 2px solid var(--border-primary);
    border-radius: var(--radius-2xl);
    padding: var(--spacing-md);
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-input);
    position: relative;
    overflow: hidden;
}

.input-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(0, 122, 204, 0.1), transparent);
    transition: left 0.5s;
}

.input-container:focus-within {
    border-color: var(--accent-primary);
    box-shadow: var(--shadow-input-focus);
    transform: scale(1.01);
}

.input-container:focus-within::before {
    left: 100%;
}

.input-field-wrapper {
    display: flex;
    align-items: flex-end;
    gap: var(--spacing-md);
}

.textarea-container {
    flex: 1;
    position: relative;
}

.message-textarea {
    width: 100%;
    background: transparent;
    border: none;
    outline: none;
    color: var(--text-primary);
    font-size: var(--font-size-base);
    font-family: inherit;
    resize: none;
    min-height: 24px;
    max-height: 120px;
    line-height: 1.5;
    padding: var(--spacing-sm) 0;
    transition: var(--transition-fast);
    scrollbar-width: thin;
    scrollbar-color: var(--border-primary) transparent;
}

.message-textarea::-webkit-scrollbar {
    width: 4px;
}

.message-textarea::-webkit-scrollbar-track {
    background: transparent;
}

.message-textarea::-webkit-scrollbar-thumb {
    background: var(--border-primary);
    border-radius: var(--radius-sm);
}

.message-textarea::placeholder {
    color: var(--text-placeholder);
    transition: var(--transition-fast);
}

.message-textarea:focus::placeholder {
    color: var(--text-dimmed);
    transform: translateY(-2px);
}

.message-textarea:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    color: var(--text-disabled);
}

.textarea-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    pointer-events: none;
    border-radius: var(--radius-md);
    background: linear-gradient(45deg, transparent 30%, rgba(0, 122, 204, 0.05) 50%, transparent 70%);
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.input-container:focus-within .textarea-overlay {
    opacity: 1;
    animation: inputShimmer 2s infinite;
}

@keyframes inputShimmer {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

.input-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

/* Enhanced Send Button */
.send-btn {
    width: 44px;
    height: 44px;
    border: none;
    border-radius: var(--radius-full);
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-spring);
    flex-shrink: 0;
    font-size: var(--font-size-base);
    box-shadow: var(--shadow-md);
    position: relative;
    overflow: hidden;
}

.send-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, var(--accent-secondary), var(--accent-primary));
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.send-btn:hover:not(:disabled) {
    transform: translateY(-3px) scale(1.05);
    box-shadow: var(--shadow-xl);
}

.send-btn:hover:not(:disabled)::before {
    opacity: 1;
}

.send-btn:active:not(:disabled) {
    transform: translateY(-1px) scale(0.98);
}

.send-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
    box-shadow: var(--shadow-sm);
}

.send-btn i {
    position: relative;
    z-index: 1;
    transition: var(--transition-fast);
}

.send-btn:hover:not(:disabled) i {
    transform: translateX(2px);
}

/* Quick Response Suggestions */
.quick-responses {
    display: none;
    flex-direction: column;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--bg-tertiary);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-primary);
    animation: slideInUp 0.3s ease-out;
    box-shadow: var(--shadow-sm);
}

.quick-responses-header {
    font-size: var(--font-size-xs);
    color: var(--text-muted);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--spacing-xs);
}

.quick-responses-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.quick-response-btn {
    background: rgba(0, 122, 204, 0.15);
    color: var(--accent-primary);
    border: 1px solid rgba(0, 122, 204, 0.3);
    border-radius: var(--radius-xl);
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-sm);
    cursor: pointer;
    transition: all var(--transition-spring);
    white-space: nowrap;
    font-weight: 500;
    font-family: inherit;
    outline: none;
    position: relative;
    overflow: hidden;
}

.quick-response-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(0, 122, 204, 0.2), transparent);
    transition: left 0.3s;
}

.quick-response-btn:hover {
    background: rgba(0, 122, 204, 0.25);
    transform: translateY(-2px) scale(1.02);
    box-shadow: var(--shadow-sm);
    border-color: var(--accent-primary);
}

.quick-response-btn:hover::before {
    left: 100%;
}

.quick-response-btn:active {
    transform: translateY(0) scale(0.98);
    box-shadow: var(--shadow-xs);
}

.quick-response-btn:focus {
    outline: 2px solid var(--accent-primary);
    outline-offset: 2px;
}

/* Input Footer */
.input-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: var(--spacing-md);
    color: var(--text-muted);
    font-size: var(--font-size-xs);
}

.input-help {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    transition: var(--transition-fast);
}

.input-help:hover {
    color: var(--text-secondary);
}

.input-stats {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.character-count,
.word-count {
    font-weight: 500;
    transition: var(--transition-fast);
    font-variant-numeric: tabular-nums;
}

.char-limit {
    opacity: 0.6;
}

/* ENHANCED SIDEBAR */
.sidebar {
    width: var(--sidebar-width);
    background: var(--bg-sidebar);
    border-left: 1px solid var(--border-primary);
    display: flex;
    flex-direction: column;
    height: 100%;
    overflow: hidden;
    position: relative;
    box-shadow: var(--shadow-xl);
    backdrop-filter: blur(10px);
}

.sidebar-content {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    padding: var(--spacing-lg);
    scroll-behavior: smooth;
    scrollbar-width: thin;
    scrollbar-color: var(--border-primary) transparent;
}

.sidebar-content::-webkit-scrollbar {
    width: 4px;
}

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

.sidebar-content::-webkit-scrollbar-thumb {
    background: var(--border-primary);
    border-radius: var(--radius-sm);
}

.sidebar-content::-webkit-scrollbar-thumb:hover {
    background: var(--border-secondary);
}

.sidebar-section {
    margin-bottom: var(--spacing-2xl);
    animation: fadeInUp 0.5s ease-out;
}

.sidebar-section h3 {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--font-size-base);
    font-weight: 700;
    margin-bottom: var(--spacing-lg);
    color: var(--text-primary);
    position: relative;
    padding-bottom: var(--spacing-sm);
}

.sidebar-section h3::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 50px;
    height: 3px;
    background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
    border-radius: var(--radius-sm);
}

.sidebar-section h3 i {
    color: var(--accent-primary);
    font-size: var(--font-size-lg);
}

/* Progress Overview */
.progress-overview {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    padding: var(--spacing-lg);
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-primary);
    margin-bottom: var(--spacing-lg);
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.progress-overview::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
}

.progress-overview:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.progress-circle {
    position: relative;
    width: 60px;
    height: 60px;
    flex-shrink: 0;
}

.progress-ring {
    width: 100%;
    height: 100%;
    transform: rotate(-90deg);
}

.progress-ring-circle {
    fill: none;
    stroke: var(--bg-tertiary);
    stroke-width: 4;
}

.progress-ring-progress {
    fill: none;
    stroke: var(--accent-primary);
    stroke-width: 4;
    stroke-linecap: round;
    stroke-dasharray: 157 157;
    stroke-dashoffset: 157;
    transition: stroke-dashoffset 0.5s ease-in-out;
}

.progress-percentage {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: var(--font-size-sm);
    font-weight: 700;
    color: var(--accent-primary);
}

.progress-details {
    flex: 1;
}

.progress-label {
    font-size: var(--font-size-xs);
    color: var(--text-muted);
    text-transform: uppercase;
    font-weight: 600;
    letter-spacing: 0.1em;
    margin-bottom: var(--spacing-xs);
}

.progress-value {
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1;
    margin-bottom: var(--spacing-xs);
}

.progress-stage {
    font-size: var(--font-size-sm);
    color: var(--accent-primary);
    font-weight: 500;
}

/* Enhanced Workflow Steps */
.workflow-steps {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.workflow-step {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--bg-card);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-lg);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.workflow-step::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    background: var(--border-primary);
    transition: all var(--transition-normal);
}

.workflow-step.active {
    border-color: var(--accent-primary);
    background: rgba(0, 122, 204, 0.05);
    transform: translateX(4px);
}

.workflow-step.active::before {
    background: var(--accent-primary);
    box-shadow: var(--shadow-glow);
}

.workflow-step.completed {
    border-color: var(--accent-success);
    background: rgba(76, 175, 80, 0.05);
}

.workflow-step.completed::before {
    background: var(--accent-success);
    box-shadow: 0 0 20px rgba(76, 175, 80, 0.3);
}

.step-icon {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-full);
    background: var(--bg-tertiary);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    flex-shrink: 0;
    transition: all var(--transition-spring);
    font-size: var(--font-size-base);
    border: 2px solid var(--border-primary);
    position: relative;
    overflow: hidden;
}

.step-icon::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: inherit;
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.workflow-step.active .step-icon {
    background: var(--accent-primary);
    color: white;
    border-color: var(--accent-primary);
    box-shadow: var(--shadow-glow);
    transform: scale(1.1);
}

.workflow-step.completed .step-icon {
    background: var(--accent-success);
    color: white;
    border-color: var(--accent-success);
    box-shadow: 0 0 20px rgba(76, 175, 80, 0.4);
}

.step-content {
    flex: 1;
    min-width: 0;
}

.step-content strong {
    display: block;
    font-size: var(--font-size-sm);
    font-weight: 600;
    margin-bottom: 0.2rem;
    color: var(--text-primary);
}

.step-content p {
    font-size: var(--font-size-xs);
    color: var(--text-muted);
    margin: 0;
    line-height: 1.4;
}

.workflow-step.active .step-content strong {
    color: var(--accent-primary);
}

.workflow-step.completed .step-content strong {
    color: var(--accent-success);
}

.step-progress {
    margin-top: var(--spacing-sm);
    height: 3px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
    overflow: hidden;
}

.progress-indicator {
    height: 100%;
    background: var(--accent-primary);
    width: 0%;
    transition: width var(--transition-slow);
    border-radius: var(--radius-sm);
    position: relative;
}

.progress-indicator::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    animation: progressShimmer 2s infinite;
}

@keyframes progressShimmer {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

.workflow-step.active .progress-indicator {
    width: 50%;
    background: var(--accent-primary);
}

.workflow-step.completed .progress-indicator {
    width: 100%;
    background: var(--accent-success);
}

/* System Health */
.system-health {
    padding: var(--spacing-lg);
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-primary);
    margin-bottom: var(--spacing-lg);
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.system-health::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
}

.system-health:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.health-indicator {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
    font-size: var(--font-size-sm);
    font-weight: 500;
}

.health-dot {
    width: 10px;
    height: 10px;
    border-radius: var(--radius-full);
    background: var(--accent-warning);
    animation: pulse 2s infinite;
    box-shadow: 0 0 15px rgba(255, 152, 0, 0.5);
}

.health-dot.ready {
    background: var(--accent-success);
    animation: none;
    box-shadow: 0 0 15px rgba(76, 175, 80, 0.5);
}

.health-dot.error {
    background: var(--accent-error);
    animation: none;
    box-shadow: 0 0 15px rgba(244, 67, 54, 0.5);
}

.health-details {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
}

.health-metric {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--font-size-xs);
    color: var(--text-secondary);
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
    transition: var(--transition-fast);
}

.health-metric:hover {
    background: var(--bg-quaternary);
}

.health-metric i {
    color: var(--accent-primary);
    width: 14px;
    flex-shrink: 0;
}

.health-metric strong {
    color: var(--text-primary);
}

.status-actions {
    display: flex;
    gap: var(--spacing-sm);
}

/* Coverage Grid */
.coverage-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
}

.coverage-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    background: var(--bg-card);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-lg);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.coverage-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--accent-success);
    transform: scaleX(0);
    transition: transform var(--transition-normal);
}

.coverage-item:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.coverage-icon {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-full);
    background: var(--bg-tertiary);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    transition: all var(--transition-spring);
    font-size: var(--font-size-sm);
    border: 2px solid var(--border-primary);
    flex-shrink: 0;
}

.coverage-icon.covered {
    background: var(--accent-success);
    color: white;
    border-color: var(--accent-success);
    box-shadow: 0 0 20px rgba(76, 175, 80, 0.4);
    transform: scale(1.1);
}

.coverage-item.completed::before {
    transform: scaleX(1);
}

.coverage-text {
    flex: 1;
    min-width: 0;
}

.coverage-label {
    display: block;
    font-size: var(--font-size-sm);
    color: var(--text-primary);
    font-weight: 600;
    margin-bottom: 0.1rem;
}

.coverage-item.completed .coverage-label {
    color: var(--accent-success);
}

.coverage-detail {
    font-size: var(--font-size-xs);
    color: var(--text-muted);
    font-style: italic;
}

/* Search Status */
.search-status {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.status-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    transition: var(--transition-normal);
    border: 1px solid var(--border-primary);
}

.status-item:hover {
    background: var(--bg-tertiary);
    transform: translateX(2px);
    box-shadow: var(--shadow-sm);
}

.status-icon {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-md);
    background: var(--bg-tertiary);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent-primary);
    font-size: var(--font-size-sm);
    flex-shrink: 0;
}

.status-info {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.status-label {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--text-primary);
}

.status-badge {
    background: var(--bg-quaternary);
    color: var(--text-secondary);
    font-size: var(--font-size-xs);
    padding: 0.2rem 0.5rem;
    border-radius: var(--radius-sm);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    transition: var(--transition-fast);
    border: 1px solid var(--border-primary);
}

.status-badge.completed {
    background: var(--accent-success);
    color: white;
    border-color: var(--accent-success);
    box-shadow: 0 0 15px rgba(76, 175, 80, 0.3);
}

/* Help Content */
.help-content {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.help-tips {
    padding: var(--spacing-md);
    background: var(--bg-tertiary);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-primary);
}

.help-tips h4 {
    font-size: var(--font-size-sm);
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.help-tips h4 i {
    color: var(--accent-warning);
}

.help-tips ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.help-tips li {
    font-size: var(--font-size-xs);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xs);
    padding-left: var(--spacing-lg);
    position: relative;
    line-height: 1.4;
}

.help-tips li::before {
    content: '•';
    color: var(--accent-primary);
    position: absolute;
    left: var(--spacing-sm);
    font-weight: bold;
}

.help-cards {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.help-card {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--bg-card);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-lg);
    transition: var(--transition-normal);
}

.help-card:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

.help-icon {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-md);
    background: var(--accent-light);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent-primary);
    flex-shrink: 0;
    font-size: var(--font-size-sm);
}

.help-text strong {
    display: block;
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.help-text p {
    font-size: var(--font-size-xs);
    color: var(--text-secondary);
    margin: 0;
    line-height: 1.4;
}

.help-actions {
    display: flex;
    gap: var(--spacing-sm);
}

/* Quick Actions */
.quick-actions {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-sm);
}

.quick-action-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-md);
    background: var(--bg-card);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-lg);
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition-spring);
    font-size: var(--font-size-xs);
    text-align: center;
    font-family: inherit;
    outline: none;
}

.quick-action-btn:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

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

.quick-action-btn i {
    font-size: var(--font-size-lg);
    color: var(--accent-primary);
    transition: var(--transition-fast);
}

.quick-action-btn:hover i {
    transform: scale(1.1);
}

/* Enhanced Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-lg);
    border: none;
    border-radius: var(--radius-lg);
    font-size: var(--font-size-sm);
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: all var(--transition-spring);
    font-family: inherit;
    position: relative;
    overflow: hidden;
    min-height: 44px;
    justify-content: center;
    outline: none;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s;
}

.btn:hover::before {
    left: 100%;
}

.btn:focus {
    outline: 2px solid var(--accent-primary);
    outline-offset: 2px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--accent-secondary), var(--accent-primary));
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

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

.btn-secondary:hover {
    background: var(--bg-quaternary);
    border-color: var(--border-secondary);
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

/* Sidebar Overlay for Mobile */
.sidebar-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    z-index: var(--z-modal-backdrop);
    display: none;
    backdrop-filter: blur(4px);
}

.sidebar-overlay.active {
    display: block;
    animation: fadeIn 0.3s ease-out;
}

/* Enhanced Loading Overlay */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--bg-overlay);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: var(--z-loading);
    backdrop-filter: blur(20px);
}

.loading-content {
    background: var(--bg-modal);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-2xl);
    padding: var(--spacing-4xl);
    text-align: center;
    box-shadow: var(--shadow-2xl);
    max-width: 400px;
    width: 90%;
    animation: fadeInScale 0.3s ease-out;
    position: relative;
    overflow: hidden;
}

.loading-content::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
}

.loading-spinner {
    width: 60px;
    height: 60px;
    margin: 0 auto var(--spacing-xl);
}

.spinner-circle {
    width: 100%;
    height: 100%;
    border: 4px solid var(--border-primary);
    border-top: 4px solid var(--accent-primary);
    border-radius: var(--radius-full);
    animation: spin 1s linear infinite;
}

.loading-content h3 {
    color: var(--text-primary);
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin: 0 0 var(--spacing-lg) 0;
}

.loading-details {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.loading-step {
    font-size: var(--font-size-sm);
    color: var(--accent-primary);
    font-weight: 500;
}

.loading-progress {
    width: 100%;
}

.loading-bar {
    width: 100%;
    height: 4px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
    overflow: hidden;
}

.loading-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
    width: 0%;
    animation: loadingProgress 2s ease-in-out infinite;
    border-radius: var(--radius-sm);
}

@keyframes loadingProgress {
    0% { width: 0%; }
    50% { width: 70%; }
    100% { width: 100%; }
}

/* Enhanced Toast Notifications */
.toast-container {
    position: fixed;
    top: calc(var(--header-height) + var(--spacing-lg));
    right: var(--spacing-xl);
    z-index: var(--z-toast);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    max-width: var(--toast-width);
    pointer-events: none;
}

.toast {
    background: var(--bg-toast);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-2xl);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-lg);
    transform: translateX(100%);
    opacity: 0;
    transition: all 0.3s ease-out;
    backdrop-filter: blur(20px);
    pointer-events: auto;
    position: relative;
    overflow: hidden;
    min-height: 60px;
}

.toast::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    background: var(--accent-info);
}

.toast.success::before { background: var(--accent-success); }
.toast.error::before { background: var(--accent-error); }
.toast.warning::before { background: var(--accent-warning); }
.toast.info::before { background: var(--accent-info); }

.toast-content {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    flex: 1;
}

.toast-icon {
    font-size: var(--font-size-lg);
    flex-shrink: 0;
}

.toast.success .toast-icon { color: var(--accent-success); }
.toast.error .toast-icon { color: var(--accent-error); }
.toast.warning .toast-icon { color: var(--accent-warning); }
.toast.info .toast-icon { color: var(--accent-info); }

.toast-message {
    flex: 1;
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--text-primary);
    line-height: 1.4;
}

.toast-close {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: var(--spacing-xs);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
    margin-left: var(--spacing-sm);
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.toast-close:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    transform: scale(1.1);
}

/* Connection Status */
.connection-status {
    position: fixed;
    top: calc(var(--header-height) + var(--spacing-sm));
    left: 50%;
    transform: translateX(-50%);
    background: var(--accent-error);
    color: white;
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-lg);
    font-size: var(--font-size-sm);
    font-weight: 500;
    z-index: var(--z-toast);
    box-shadow: var(--shadow-lg);
    animation: slideInDown 0.3s ease-out;
}

.connection-content {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.connection-content i {
    animation: pulse 1s infinite;
}

/* Enhanced Error Boundary */
.error-boundary {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--bg-overlay);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: var(--z-loading);
    backdrop-filter: blur(20px);
}

.error-boundary-content {
    background: var(--bg-modal);
    border: 2px solid var(--accent-error);
    border-radius: var(--radius-2xl);
    padding: var(--spacing-4xl);
    text-align: center;
    box-shadow: var(--shadow-2xl);
    max-width: 500px;
    width: 90%;
    animation: fadeInScale 0.3s ease-out;
    position: relative;
    overflow: hidden;
}

.error-boundary-content::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--accent-error);
}

.error-icon {
    font-size: var(--font-size-5xl);
    color: var(--accent-error);
    margin-bottom: var(--spacing-lg);
    animation: pulse 2s infinite;
}

.error-boundary-content h2 {
    color: var(--accent-error);
    margin-bottom: var(--spacing-lg);
    font-size: var(--font-size-2xl);
    font-weight: 700;
}

.error-boundary-content p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
    line-height: 1.6;
}

.error-actions {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    margin-bottom: var(--spacing-lg);
}

.error-details {
    margin-top: var(--spacing-lg);
    text-align: left;
}

.error-details summary {
    color: var(--text-muted);
    cursor: pointer;
    font-size: var(--font-size-sm);
    margin-bottom: var(--spacing-sm);
    transition: var(--transition-fast);
}

.error-details summary:hover {
    color: var(--text-primary);
}

.error-info {
    background: var(--bg-tertiary);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    font-family: monospace;
    font-size: var(--font-size-xs);
    color: var(--text-secondary);
    border: 1px solid var(--border-primary);
    max-height: 200px;
    overflow-y: auto;
    margin-top: var(--spacing-sm);
}

/* Animations */
@keyframes messageSlideIn {
    from {
        opacity: 0;
        transform: translateY(30px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

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

@keyframes fadeInScale {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

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

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* RESPONSIVE DESIGN - Enhanced */

/* Large Tablets and Small Desktops */
@media (max-width: 1200px) {
    :root {
        --sidebar-width: 350px;
        --toast-width: 350px;
    }
    
    .sidebar {
        width: var(--sidebar-width);
    }
    
    .input-area {
        right: var(--sidebar-width);
    }
    
    .message-content {
        max-width: 80%;
    }
    
    .coverage-grid {
        grid-template-columns: 1fr;
    }
}

/* Tablets */
@media (max-width: 1024px) {
    .mobile-sidebar-toggle {
        display: flex;
    }
    
    .sidebar {
        position: fixed;
        top: 0;
        right: calc(-1 * var(--sidebar-width));
        z-index: var(--z-modal);
        transition: transform var(--transition-normal);
        height: 100vh;
        width: var(--sidebar-width);
        box-shadow: var(--shadow-2xl);
    }
    
    .sidebar.open {
        transform: translateX(calc(-1 * var(--sidebar-width)));
    }
    
    .input-area {
        right: 0;
    }
    
    .message-content {
        max-width: 85%;
    }
    
    .quick-actions {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .toast-container {
        right: var(--spacing-md);
        max-width: calc(100vw - var(--spacing-xl));
    }
    
    .workflow-steps {
        gap: var(--spacing-sm);
    }
}

/* Mobile Phones */
@media (max-width: 768px) {
    :root {
        --header-height: 60px;
        --spacing-xl: 1rem;
        --spacing-2xl: 1.5rem;
        --avatar-size: 32px;
        --font-size-base: 0.85rem;
        --font-size-sm: 0.75rem;
        --font-size-xs: 0.7rem;
    }
    
    .chat-header {
        padding: var(--spacing-md) var(--spacing-lg);
    }
    
    .logo-text h1 {
        font-size: var(--font-size-lg);
    }
    
    .logo-subtitle {
        display: none;
    }
    
    .status-button {
        padding: var(--spacing-xs) var(--spacing-sm);
        font-size: var(--font-size-xs);
    }
    
    .status-button .status-text {
        display: none;
    }
    
    .messages-container {
        padding: var(--spacing-lg);
        padding-bottom: var(--spacing-3xl);
    }
    
    .message-content {
        max-width: 90%;
        padding: var(--spacing-md) var(--spacing-lg);
    }
    
    .input-wrapper {
        padding: var(--spacing-md);
    }
    
    .sidebar {
        width: 100%;
        right: -100%;
    }
    
    .sidebar.open {
        transform: translateX(-100%);
    }
    
    .sidebar-content {
        padding: var(--spacing-md);
    }
    
    .toast-container {
        top: calc(var(--header-height) + var(--spacing-md));
        right: var(--spacing-md);
        left: var(--spacing-md);
        max-width: none;
    }
    
    .progress-overview {
        flex-direction: column;
        text-align: center;
        gap: var(--spacing-md);
    }
    
    .coverage-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-sm);
    }
    
    .workflow-steps {
        gap: var(--spacing-sm);
    }
    
    .workflow-step {
        padding: var(--spacing-sm);
    }
    
    .sidebar-section {
        margin-bottom: var(--spacing-lg);
    }
    
    .quick-actions {
        grid-template-columns: repeat(3, 1fr);
        gap: var(--spacing-xs);
    }
    
    .quick-action-btn {
        padding: var(--spacing-sm);
        font-size: 0.65rem;
    }
    
    .loading-content {
        padding: var(--spacing-2xl);
    }
    
    .error-boundary-content {
        padding: var(--spacing-2xl);
        max-width: 350px;
    }
    
    .quick-responses-buttons {
        gap: var(--spacing-xs);
    }
    
    .quick-response-btn {
        padding: var(--spacing-xs) var(--spacing-sm);
        font-size: var(--font-size-xs);
    }
    
    .input-stats {
        gap: var(--spacing-sm);
    }
    
    .welcome-features {
        grid-template-columns: 1fr;
        gap: var(--spacing-sm);
    }
    
    .feature-item {
        padding: var(--spacing-xs);
        font-size: var(--font-size-xs);
    }
}

/* Small Mobile Phones */
@media (max-width: 480px) {
    :root {
        --font-size-base: 0.8rem;
        --font-size-sm: 0.7rem;
        --font-size-xs: 0.65rem;
        --spacing-lg: 0.75rem;
        --spacing-xl: 1rem;
    }
    
    .input-field-wrapper {
        flex-direction: column;
        gap: var(--spacing-md);
        align-items: stretch;
    }
    
    .send-btn {
        align-self: flex-end;
        width: 48px;
        height: 48px;
    }
    
    .message-avatar {
        width: 28px;
        height: 28px;
        margin: 0 var(--spacing-sm);
    }
    
    .step-icon,
    .coverage-icon,
    .status-icon,
    .help-icon {
        width: 28px;
        height: 28px;
    }
    
    .logo-icon {
        width: 32px;
        height: 32px;
    }
    
    .progress-circle {
        width: 50px;
        height: 50px;
    }
    
    .coverage-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-xs);
    }
    
    .quick-actions {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .quick-responses-buttons {
        flex-direction: column;
        align-items: stretch;
    }
    
    .quick-response-btn {
        text-align: center;
        justify-content: center;
    }
    
    .help-cards {
        gap: var(--spacing-xs);
    }
    
    .help-card {
        padding: var(--spacing-sm);
    }
    
    .input-footer {
        flex-direction: column;
        gap: var(--spacing-xs);
        align-items: center;
    }
}

/* High Contrast Mode Support */
@media (prefers-contrast: high) {
    :root {
        --border-primary: #666666;
        --border-secondary: #888888;
        --text-muted: #aaaaaa;
        --bg-primary: #000000;
        --bg-secondary: #111111;
        --text-primary: #ffffff;
    }
    
    .message-content,
    .quick-response-btn,
    .toast,
    .btn {
        border: 2px solid;
    }
    
    .status-dot,
    .health-dot {
        border: 2px solid var(--text-primary);
    }
}

/* Reduced Motion Support */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    .typing-dot,
    .status-dot,
    .health-dot,
    .message,
    .progress-fill,
    .loading-fill,
    .spinner-circle {
        animation: none !important;
    }
    
    .logo-icon::before {
        animation: none !important;
    }
}

/* Focus Styles for Accessibility */
*:focus {
    outline: 2px solid var(--accent-primary);
    outline-offset: 2px;
}

button:focus,
textarea:focus,
input:focus {
    outline: none;
}

.input-container:focus-within,
.quick-response-btn:focus,
.btn:focus,
.toast-close:focus,
.quick-action-btn:focus,
.help-card:focus {
    outline: 2px solid var(--accent-primary);
    outline-offset: 2px;
}

/* Print Styles */
@media print {
    .sidebar,
    .input-area,
    .chat-header,
    .mobile-sidebar-toggle,
    .loading-overlay,
    .toast-container,
    .quick-responses,
    .input-hint-container,
    .connection-status,
    .error-boundary {
        display: none !important;
    }
    
    .main-container {
        height: auto;
    }
    
    .chat-area {
        background: white;
        color: black;
    }
    
    .messages-container {
        padding-bottom: 0;
        overflow: visible;
        height: auto;
        background: white;
    }
    
    .message-content {
        background: white !important;
        color: black !important;
        border: 1px solid #ccc !important;
        box-shadow: none !important;
    }
    
    .message {
        break-inside: avoid;
        margin-bottom: 1rem;
        opacity: 1 !important;
        transform: none !important;
    }
    
    .message-avatar {
        border: 1px solid #ccc;
        background: #f5f5f5 !important;
        color: #333 !important;
    }
}

/* Utility Classes */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.hidden {
    display: none !important;
}

.visible {
    display: block !important;
}

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

.text-left {
    text-align: left;
}

.text-right {
    text-align: right;
}

.w-full {
    width: 100%;
}

.h-full {
    height: 100%;
}

.flex {
    display: flex;
}

.flex-col {
    flex-direction: column;
}

.items-center {
    align-items: center;
}

.justify-center {
    justify-content: center;
}

.gap-2 {
    gap: var(--spacing-sm);
}

.gap-4 {
    gap: var(--spacing-lg);
}

.p-2 {
    padding: var(--spacing-sm);
}

.p-4 {
    padding: var(--spacing-lg);
}

.m-2 {
    margin: var(--spacing-sm);
}

.m-4 {
    margin: var(--spacing-lg);
}

.skip-link {
    position: absolute;
    top: -40px;
    left: 6px;
    background: var(--accent-primary);
    color: white;
    padding: 8px;
    text-decoration: none;
    border-radius: var(--radius-sm);
    z-index: var(--z-tooltip);
    transition: var(--transition-fast);
}

.skip-link:focus {
    top: 6px;
}

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

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

::-webkit-scrollbar-thumb {
    background: var(--border-primary);
    border-radius: var(--radius-sm);
    transition: var(--transition-fast);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--border-secondary);
}

::-webkit-scrollbar-corner {
    background: var(--bg-tertiary);
}

/* Selection Styles */
::selection {
    background: var(--accent-primary);
    color: white;
}

::-moz-selection {
    background: var(--accent-primary);
    color: white;
}

/* Placeholder Styles */
::placeholder {
    color: var(--text-placeholder);
    opacity: 1;
}

::-webkit-input-placeholder {
    color: var(--text-placeholder);
}

::-moz-placeholder {
    color: var(--text-placeholder);
    opacity: 1;
}

:-ms-input-placeholder {
    color: var(--text-placeholder);
}

:-moz-placeholder {
    color: var(--text-placeholder);
    opacity: 1;
}

/* Performance Optimizations */
.message,
.quick-response-btn,
.btn,
.toast,
.workflow-step,
.coverage-item,
.status-item,
.help-card,
.quick-action-btn {
    will-change: transform;
}

.typing-dot,
.status-dot,
.health-dot,
.spinner-circle,
.progress-fill,
.loading-fill,
.progress-ring-progress {
    will-change: transform, opacity;
}

/* Enhanced Loading States */
.input-container[aria-busy="true"] {
    position: relative;
    overflow: hidden;
}

.input-container[aria-busy="true"]::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(0,122,204,0.3), transparent);
    animation: shimmer 1.5s infinite;
}

@keyframes shimmer {
    0% { left: -100%; }
    100% { left: 100%; }
}

/* Dark Mode Support (if system preference changes) */
@media (prefers-color-scheme: light) {
    /* Light mode overrides can be added here if needed */
    /* Currently optimized for dark mode */
}

/* End of Enhanced CSS Framework v2.0 */