/* ===== CSS RESET & FUNDAMENTALS ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Light Theme Color Palette */
    --color-primary: #6366f1;
    --color-primary-light: #8b5cf6;
    --color-primary-dark: #4f46e5;
    --color-secondary: #06b6d4;
    --color-accent: #10b981;
    --color-warning: #f59e0b;
    --color-danger: #ef4444;
    --color-red-50: #fef2f2;
    --color-red-600: #dc2626;
    --color-red-700: #b91c1c;
    
    /* Neutral Shades - Light Theme */
    --color-white: #ffffff;
    --color-gray-50: #f8fafc;
    --color-gray-100: #f1f5f9;
    --color-gray-200: #e2e8f0;
    --color-gray-300: #cbd5e1;
    --color-gray-400: #94a3b8;
    --color-gray-500: #64748b;
    --color-gray-600: #475569;
    --color-gray-700: #334155;
    --color-gray-800: #1e293b;
    --color-gray-900: #0f172a;
    
    /* Background Gradients */
    --bg-main: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    --bg-sidebar: linear-gradient(180deg, #ffffff 0%, #f8fafc 100%);
    --bg-card: linear-gradient(145deg, #ffffff 0%, #f8fafc 100%);
    --bg-primary: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    --bg-glass: rgba(255, 255, 255, 0.7);
    
    /* Shadows & Effects */
    --shadow-soft: 0 2px 15px rgba(0, 0, 0, 0.08);
    --shadow-medium: 0 4px 25px rgba(0, 0, 0, 0.12);
    --shadow-hard: 0 8px 35px rgba(0, 0, 0, 0.15);
    --shadow-glow: 0 0 25px rgba(99, 102, 241, 0.25);
    --shadow-card-hover: 0 8px 30px rgba(0, 0, 0, 0.1);
    
    /* Typography */
    --font-primary: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    --font-mono: 'SF Mono', Monaco, 'Cascadia Code', 'Roboto Mono', Consolas, monospace;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

body {
    font-family: var(--font-primary);
    background: var(--bg-main);
    color: var(--color-gray-800);
    line-height: 1.6;
    overflow: hidden;
    height: 100vh;
}

/* ===== MAIN LAYOUT ===== */
.app-container {
    display: flex;
    height: 100vh;
    max-width: 100vw;
    background: var(--bg-main);
    position: relative;
}

/* ===== SIDEBAR STYLES ===== */
.sidebar {
    width: 320px;
    background: var(--bg-sidebar);
    border-right: 1px solid var(--color-gray-200);
    display: flex;
    flex-direction: column;
    position: relative;
    z-index: 10;
    box-shadow: var(--shadow-soft);
}

/* Sidebar Header */
.sidebar-header {
    padding: var(--spacing-xl);
    border-bottom: 1px solid var(--color-gray-100);
    background: var(--color-white);
}

.logo-section {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    cursor: pointer;
    transition: opacity var(--transition-fast);
}

.logo-section:hover {
    opacity: 0.8;
}

.logo-icon {
    width: 48px;
    height: 48px;
    background: var(--color-white);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-white);
    box-shadow: var(--shadow-glow);
    border: 2px solid var(--color-gray-200);
}

.logo-icon svg {
    width: 24px;
    height: 24px;
}

.logo-icon img {
    width: 24px;
    height: 24px;
    object-fit: contain;
}

.logo-text h1 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-gray-900);
    margin-bottom: 0.125rem;
}

.logo-text span {
    font-size: 0.875rem;
    color: var(--color-gray-500);
    font-weight: 500;
}

.new-chat-button {
    width: 100%;
    background: var(--bg-primary);
    color: var(--color-white);
    border: none;
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-lg);
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-soft);
}

.new-chat-button:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow), var(--shadow-medium);
}

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

/* Building Selector */
.building-selector {
    padding: var(--spacing-sm) var(--spacing-md);
    border-bottom: 1px solid var(--color-gray-100);
    background: var(--color-gray-50);
}

.building-label {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-gray-700);
    margin-bottom: var(--spacing-xs);
}

.building-label svg {
    width: 16px;
    height: 16px;
    color: var(--color-primary);
}

.building-dropdown {
    width: 100%;
    padding: var(--spacing-md);
    border: 2px solid var(--color-gray-200);
    border-radius: var(--radius-md);
    background: var(--color-white);
    color: var(--color-gray-700);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
}

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

/* Chat History */
.chat-history {
    flex: 1;
    padding: var(--spacing-lg) 0;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.chat-history-header {
    padding: 0 var(--spacing-xl) var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.chat-history-header h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-gray-900);
}

.chat-count {
    font-size: 0.75rem;
    color: var(--color-gray-500);
    background: var(--color-gray-100);
    padding: 0.25rem 0.5rem;
    border-radius: var(--radius-sm);
}

.chat-list {
    flex: 1;
    overflow-y: auto;
    padding: 0 var(--spacing-md);
}

.chat-item {
    display: flex;
    align-items: center;
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-fast);
    border: 2px solid transparent;
    background: var(--color-white);
    position: relative;
}

.chat-item:hover {
    background: var(--color-gray-50);
    border-color: var(--color-gray-200);
    transform: translateX(4px);
}

.chat-item.active {
    background: var(--bg-card);
    border-color: var(--color-primary);
    box-shadow: var(--shadow-soft);
}

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

.chat-item-title {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-gray-900);
    margin-bottom: 0.25rem;
    overflow: hidden;
    white-space: nowrap;
    text-overflow: ellipsis;
}

.chat-item-preview {
    font-size: 0.75rem;
    color: var(--color-gray-500);
    margin-bottom: 0.25rem;
    overflow: hidden;
    white-space: nowrap;
    text-overflow: ellipsis;
}

.chat-item-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.625rem;
    color: var(--color-gray-400);
}

.chat-building {
    background: var(--color-primary);
    color: var(--color-white);
    padding: 0.125rem 0.375rem;
    border-radius: var(--radius-sm);
    font-weight: 500;
}

.chat-item-menu-container {
    position: relative;
    display: flex;
    align-items: center;
}

.chat-item-menu {
    background: none;
    border: none;
    color: var(--color-gray-400);
    width: 24px;
    height: 24px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: all var(--transition-fast);
}

.chat-item:hover .chat-item-menu {
    opacity: 1;
}

.chat-item-menu:hover {
    background: var(--color-gray-100);
    color: var(--color-gray-600);
}

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

/* Dropdown Menu Styles */
.chat-menu-dropdown {
    position: absolute;
    top: 100%;
    right: 0;
    background: var(--color-white);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    z-index: 1000;
    min-width: 140px;
    padding: var(--spacing-xs) 0;
    margin-top: 2px;
    animation: dropdownFadeIn 0.15s ease-out;
}

@keyframes dropdownFadeIn {
    from {
        opacity: 0;
        transform: translateY(-4px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.chat-menu-item {
    width: 100%;
    background: none;
    border: none;
    padding: var(--spacing-sm) var(--spacing-md);
    text-align: left;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 0.875rem;
    color: var(--color-gray-700);
    transition: all var(--transition-fast);
}

.chat-menu-item:hover {
    background: var(--color-gray-50);
    color: var(--color-gray-900);
}

.chat-menu-item.delete-item {
    color: var(--color-red-600);
}

.chat-menu-item.delete-item:hover {
    background: var(--color-red-50);
    color: var(--color-red-700);
}

.chat-menu-item svg {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
}

/* Sidebar Footer */
.sidebar-footer {
    padding: var(--spacing-lg) var(--spacing-xl);
    border-top: 1px solid var(--color-gray-100);
    background: var(--color-white);
}

.connection-status {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 0.75rem;
    color: var(--color-gray-600);
}

.status-indicator {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--color-accent);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% { opacity: 1; }
    50% { opacity: 0.5; }
    100% { opacity: 1; }
}

/* ===== MAIN CONTENT STYLES ===== */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    background: var(--color-white);
    position: relative;
}

/* Chat Header */
.chat-header {
    padding: var(--spacing-md) var(--spacing-2xl);
    background: var(--color-white);
    border-bottom: 1px solid var(--color-gray-100);
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: var(--shadow-soft);
    position: relative;
    z-index: 5;
}

.chat-title-section h2 {
    font-size: 1.375rem;
    font-weight: 700;
    color: var(--color-gray-900);
    letter-spacing: -0.025em;
}

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

.building-tag {
    background: var(--bg-primary);
    color: var(--color-white);
    padding: 0.375rem 0.875rem;
    border-radius: var(--radius-md);
    font-size: 0.8rem;
    font-weight: 600;
}

.session-info {
    font-size: 0.8rem;
    color: var(--color-gray-500);
    font-weight: 500;
}

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

.action-button {
    width: 40px;
    height: 40px;
    background: var(--color-gray-50);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-md);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-gray-600);
    transition: all var(--transition-fast);
}

.action-button:hover {
    background: var(--color-gray-100);
    border-color: var(--color-gray-300);
    color: var(--color-gray-700);
    transform: translateY(-1px);
}

.action-button svg {
    width: 18px;
    height: 18px;
}

/* Messages Container */
.messages-container {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-lg) var(--spacing-2xl) var(--spacing-2xl);
    background: var(--bg-main);
    position: relative;
}

/* Welcome Screen */
.welcome-screen {
    max-width: 1000px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    animation: fadeInUp 0.6s ease-out;
}

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

/* Energy Dashboard */
.energy-dashboard {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
}

/* Loading States */
.loading-spinner {
    width: 24px;
    height: 24px;
    border: 3px solid var(--color-gray-200);
    border-top: 3px solid var(--color-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    display: inline-block;
    margin-right: var(--spacing-sm);
}

.loading-text {
    color: var(--color-gray-500);
    font-size: 0.9rem;
}

.loading-bar {
    width: 60%;
    height: 12px;
    background: var(--color-gray-200);
    border-radius: var(--radius-sm);
    position: relative;
    overflow: hidden;
}

.loading-bar::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, 
        transparent, 
        var(--color-gray-300), 
        transparent
    );
    animation: loading-slide 1.5s infinite;
}

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

@keyframes loading-slide {
    0% { left: -100%; }
    100% { left: 100%; }
}

.dashboard-card {
    background: var(--bg-card);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl) var(--spacing-lg);
    box-shadow: var(--shadow-soft);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
    min-height: 140px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.dashboard-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--bg-primary);
    transform: scaleX(0);
    transition: transform var(--transition-normal);
}

.dashboard-card:hover::before {
    transform: scaleX(1);
}

.dashboard-card.primary::before {
    background: var(--bg-primary);
}

.dashboard-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-card-hover);
}

.card-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
    color: var(--color-gray-600);
    font-size: 0.875rem;
    font-weight: 600;
}

.card-header svg {
    width: 20px;
    height: 20px;
    color: var(--color-primary);
}

.card-value {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--color-gray-900);
    margin-bottom: var(--spacing-sm);
    line-height: 1;
    letter-spacing: -0.025em;
}

.card-trend {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 0.8rem;
    font-weight: 600;
    margin-top: auto;
}

.card-trend.positive {
    color: var(--color-accent);
}

.card-trend.negative {
    color: var(--color-danger);
}

.card-trend svg {
    width: 14px;
    height: 14px;
}

/* Welcome Message */
.welcome-message {
    background: var(--bg-card);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-2xl);
    padding: var(--spacing-lg) var(--spacing-lg);
    text-align: center;
    box-shadow: var(--shadow-soft);
    position: relative;
}

.welcome-icon {
    width: 48px;
    height: 48px;
    background: var(--color-white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-md);
    color: var(--color-white);
    box-shadow: var(--shadow-glow);
    border: 2px solid var(--color-gray-200);
}

.welcome-icon svg {
    width: 32px;
    height: 32px;
}

.welcome-icon img {
    width: 32px;
    height: 32px;
    object-fit: contain;
}

.welcome-message h2 {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--color-gray-900);
    margin-bottom: var(--spacing-sm);
    letter-spacing: -0.025em;
}

.welcome-message p {
    font-size: 1rem;
    color: var(--color-gray-600);
    line-height: 1.6;
    margin-bottom: var(--spacing-lg);
    max-width: 520px;
    margin-left: auto;
    margin-right: auto;
}

/* Suggestion Grid */
.suggestion-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-lg);
    max-width: 600px;
    margin: 0 auto;
}

.suggestion-card {
    background: var(--color-white);
    border: 2px solid var(--color-gray-200);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    cursor: pointer;
    transition: all var(--transition-normal);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
    text-align: center;
    font-weight: 600;
    color: var(--color-gray-700);
    min-height: 120px;
    justify-content: center;
}

.suggestion-card:hover {
    border-color: var(--color-primary);
    background: var(--color-gray-50);
    transform: translateY(-3px);
    box-shadow: var(--shadow-medium);
}

.suggestion-card svg {
    width: 40px;
    height: 40px;
    color: var(--color-primary);
}

/* Chat Messages Container */
.chat-messages {
    max-width: 900px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
    animation: fadeInUp 0.6s ease-out;
}

/* Message Base Styles */
.message {
    display: flex;
    animation: slideInMessage 0.4s ease-out;
    position: relative;
}

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

/* User Message Styles */
.user-message {
    justify-content: flex-end;
    align-items: flex-end;
    flex-direction: column;
}

.user-message .message-content {
    background: var(--bg-primary);
    color: var(--color-white);
    border-radius: var(--radius-lg) var(--radius-lg) var(--radius-sm) var(--radius-lg);
    max-width: 75%;
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: 0.925rem;
    line-height: 1.5;
    box-shadow: var(--shadow-soft);
    word-wrap: break-word;
    position: relative;
}

.user-message .message-time {
    font-size: 0.7rem;
    color: var(--color-gray-400);
    margin-top: var(--spacing-xs);
    text-align: right;
}

/* AI Message Styles */
.ai-message {
    align-items: flex-start;
    gap: var(--spacing-sm);
    flex-direction: row;
}

.message-avatar {
    width: 36px;
    height: 36px;
    background: var(--bg-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-white);
    flex-shrink: 0;
    box-shadow: var(--shadow-soft);
    margin-top: var(--spacing-xs);
}

.message-avatar svg {
    width: 18px;
    height: 18px;
}

.message-wrapper {
    flex: 1;
    max-width: 75%;
}

.ai-message .message-content {
    background: var(--color-white);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-sm) var(--radius-lg) var(--radius-lg) var(--radius-lg);
    padding: var(--spacing-lg);
    font-size: 0.925rem;
    line-height: 1.6;
    color: var(--color-gray-800);
    box-shadow: var(--shadow-soft);
    word-wrap: break-word;
    position: relative;
}

.ai-message .message-time {
    font-size: 0.7rem;
    color: var(--color-gray-400);
    margin-top: var(--spacing-xs);
    text-align: left;
}

/* Message Content Typography */
.message-content h1,
.message-content h2,
.message-content h3,
.message-content h4 {
    margin: var(--spacing-md) 0 var(--spacing-sm) 0;
    color: var(--color-gray-900);
    font-weight: 600;
    line-height: 1.3;
}

.message-content h1 { font-size: 1.25rem; }
.message-content h2 { font-size: 1.15rem; }  
.message-content h3 { font-size: 1.05rem; color: var(--color-primary); }
.message-content h4 { font-size: 1rem; color: var(--color-gray-700); }

.message-content ul,
.message-content ol {
    margin: var(--spacing-sm) 0;
    padding-left: var(--spacing-lg);
}

.message-content li {
    margin: var(--spacing-xs) 0;
    line-height: 1.5;
}

.message-content p {
    margin: var(--spacing-sm) 0;
}

.message-content strong {
    font-weight: 600;
    color: var(--color-gray-900);
}

.message-content em {
    font-style: italic;
    color: var(--color-gray-600);
}

.message-content code {
    background: var(--color-gray-100);
    padding: 0.125rem 0.375rem;
    border-radius: var(--radius-sm);
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--color-primary);
    border: 1px solid var(--color-gray-200);
}

/* Message Hover Effects */
.message:hover .message-time {
    opacity: 1;
}

.user-message .message-time,
.ai-message .message-time {
    opacity: 0.7;
    transition: opacity var(--transition-fast);
}

/* Message Actions (for future use) */
.message-actions {
    display: flex;
    gap: var(--spacing-xs);
    margin-top: var(--spacing-xs);
    opacity: 0;
    transition: opacity var(--transition-fast);
}

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

.message-action {
    background: var(--color-gray-100);
    border: none;
    border-radius: var(--radius-sm);
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: 0.75rem;
    color: var(--color-gray-600);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.message-action:hover {
    background: var(--color-gray-200);
    color: var(--color-gray-700);
}

/* Typing Indicator */
.typing-indicator {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-lg) var(--spacing-2xl);
    margin-bottom: var(--spacing-md);
    animation: fadeIn 0.3s ease;
    position: relative;
    z-index: 1;
}

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

.typing-avatar {
    width: 40px;
    height: 40px;
    background: var(--bg-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-white);
    flex-shrink: 0;
}

.typing-avatar svg {
    width: 20px;
    height: 20px;
}

.typing-content {
    background: var(--color-white);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md) var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    box-shadow: var(--shadow-soft);
    min-height: 44px;
    transition: all 0.2s ease;
}

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

.typing-dots span {
    width: 6px;
    height: 6px;
    background: var(--color-primary);
    border-radius: 50%;
    animation: typingAnimation 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 typingAnimation {
    0%, 80%, 100% {
        transform: scale(0.8);
        opacity: 0.5;
    }
    40% {
        transform: scale(1);
        opacity: 1;
    }
}

.typing-text {
    font-size: 0.875rem;
    color: var(--color-gray-600);
    font-weight: 500;
    white-space: nowrap;
}

/* Chat Input */
.chat-input-container {
    padding: var(--spacing-md) var(--spacing-md);
    background: var(--color-white);
    border-top: 1px solid var(--color-gray-100);
    box-shadow: var(--shadow-soft);
}

.input-wrapper {
    display: flex;
    gap: var(--spacing-md);
    align-items: flex-end;
    background: var(--color-gray-50);
    border: 2px solid var(--color-gray-200);
    border-radius: var(--radius-xl);
    padding: var(--spacing-sm) var(--spacing-md);
    transition: all var(--transition-fast);
    box-shadow: var(--shadow-soft);
}

.input-wrapper:focus-within {
    border-color: var(--color-primary);
    background: var(--color-white);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1), var(--shadow-medium);
}

.message-input {
    flex: 1;
    border: none;
    background: transparent;
    resize: none;
    font-family: inherit;
    font-size: 0.925rem;
    line-height: 1;
    color: var(--color-gray-800);
    min-height: 22px;
    max-height: 120px;
    outline: none;
}

.message-input:focus {
    border: none;
    outline: none;
    box-shadow: none;
}

.message-input::placeholder {
    color: var(--color-gray-400);
}

.send-button {
    width: 35px;
    height: 35px;
    background: var(--bg-primary);
    color: var(--color-white);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
    flex-shrink: 0;
}

.send-button:hover:not(:disabled) {
    transform: scale(1.05);
    box-shadow: var(--shadow-glow);
}

.send-button:disabled {
    background: var(--color-gray-300);
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.send-button svg {
    width: 15px;
    height: 15px;
}

.input-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: var(--spacing-xs);
}

.input-hints {
    font-size: 0.75rem;
    color: var(--color-gray-500);
}

.input-hints kbd {
    background: var(--color-gray-100);
    padding: 0.125rem 0.375rem;
    border-radius: var(--radius-sm);
    font-family: var(--font-mono);
    font-size: 0.625rem;
    border: 1px solid var(--color-gray-300);
}

.ai-status {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 0.75rem;
    color: var(--color-gray-600);
}

.status-dot {
    width: 6px;
    height: 6px;
    background: var(--color-accent);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

co.status-dot.connected {
    background: var(--color-accent);
}

.status-dot.disconnected {
    background: var(--color-danger);
    animation: none;
}

/* Connection Status in Chat Meta */
.connection-status {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 0.75rem;
    color: var(--color-gray-600);
    padding: 0.25rem 0.5rem;
    border-radius: var(--radius-sm);
    background: var(--color-gray-100);
}

.connection-status.connected {
    color: var(--color-accent);
    background: rgba(16, 185, 129, 0.1);
}

.connection-status.disconnected {
    color: var(--color-danger);
    background: rgba(239, 68, 68, 0.1);
}

.connection-status .status-indicator {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: currentColor;
}

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 1024px) {
    .sidebar {
        width: 280px;
    }
    
    .energy-dashboard {
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
        gap: var(--spacing-lg);
    }
    
    .suggestion-grid {
        grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
        gap: var(--spacing-md);
    }
}

@media (max-width: 768px) {
    .app-container {
        flex-direction: column;
    }
    
    .sidebar {
        width: 100%;
        height: auto;
        max-height: 50vh;
        overflow-y: auto;
    }
    
    .chat-header {
        padding: var(--spacing-lg);
    }
    
    .chat-header h2 {
        font-size: 1.25rem;
    }
    
    .messages-container {
        padding: var(--spacing-lg);
    }
    
    .chat-input-container {
        padding: var(--spacing-lg);
    }
    
    .energy-dashboard {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    .suggestion-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-md);
    }
    
    .card-value {
        font-size: 2rem;
    }
    
    .dashboard-card {
        min-height: 120px;
    }
    
    /* Chat Messages Mobile Styles */
    .chat-messages {
        gap: var(--spacing-md);
    }
    
    .user-message .message-content,
    .message-wrapper {
        max-width: 85%;
    }
    
    .ai-message {
        gap: var(--spacing-xs);
    }
    
    .message-avatar {
        width: 32px;
        height: 32px;
    }
    
    .message-avatar svg {
        width: 16px;
        height: 16px;
    }
    
    .ai-message .message-content,
    .user-message .message-content {
        padding: var(--spacing-md);
        font-size: 0.9rem;
    }
}

@media (max-width: 480px) {
    :root {
        --spacing-xl: 1rem;
        --spacing-2xl: 1.5rem;
    }
    
    .sidebar-header {
        padding: var(--spacing-lg);
    }
    
    .suggestion-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-sm);
        max-width: 400px;
    }
    
    .suggestion-card {
        min-height: 100px;
        padding: var(--spacing-lg);
    }
    
    .welcome-message h2 {
        font-size: 1.5rem;
    }
    
    .welcome-message p {
        font-size: 1rem;
    }
    
    .input-footer {
        flex-direction: column;
        gap: var(--spacing-sm);
        align-items: flex-start;
    }
    
    /* Ultra Small Screen Chat Messages */
    .user-message .message-content,
    .message-wrapper {
        max-width: 90%;
    }
    
    .ai-message .message-content,
    .user-message .message-content {
        padding: var(--spacing-sm) var(--spacing-md);
        font-size: 0.875rem;
    }
    
    .message-avatar {
        width: 28px;
        height: 28px;
    }
    
    .message-avatar svg {
        width: 14px;
        height: 14px;
    }
}

/* ===== SCROLLBAR STYLING ===== */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-track {
    background: var(--color-gray-100);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb {
    background: var(--color-gray-300);
    border-radius: 3px;
    transition: background var(--transition-fast);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-gray-400);
}

/* ===== ACCESSIBILITY ===== */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Focus styles for accessibility */
button:focus-visible,
select:focus-visible,
textarea:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    :root {
        --color-gray-200: #000000;
        --color-gray-300: #000000;
        --shadow-soft: 0 2px 15px rgba(0, 0, 0, 0.3);
        --shadow-medium: 0 4px 20px rgba(0, 0, 0, 0.4);
    }
}