/* ============================================================================
   SWAT AI CHATBOT - CHAT INTERFACE STYLES
   ============================================================================
   Location: D:\FYP - FINAL\SwatDashboard\wwwroot\css\chat.css
   
   SCADA Color Scheme:
   - Normal: #4CAF50 (Green)
   - Warning: #FF9800 (Orange)
   - Critical: #F44336 (Red)
   - Offline: #9E9E9E (Gray)
   - Primary: #2196F3 (Blue)
   ============================================================================ */

/* ============================================================================
   ROOT VARIABLES
   ============================================================================ */
:root {
    /* System Status Colors */
    --color-normal: #4CAF50;
    --color-warning: #FF9800;
    --color-critical: #F44336;
    --color-offline: #9E9E9E;
    
    /* UI Colors */
    --color-primary: #2196F3;
    --color-secondary: #00BCD4;
    --color-accent: #FFC107;
    
    /* Background Colors */
    --color-bg-dark: #1E1E1E;
    --color-bg-surface: #2D2D2D;
    --color-bg-elevated: #3D3D3D;
    
    /* Text Colors */
    --color-text-primary: #FFFFFF;
    --color-text-secondary: #B0B0B0;
    --color-text-disabled: #666666;
    
    /* Chat Colors */
    --color-user-bubble: #2196F3;
    --color-bot-bubble: #3D3D3D;
    --color-bubble-text: #FFFFFF;
    
    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 300ms ease;
    --transition-slow: 500ms ease;
}

/* ============================================================================
   CHAT CONTAINER
   ============================================================================ */
#chat-container {
    display: flex;
    flex-direction: column;
    height: calc(100vh - 200px); /* Adjust based on your dashboard header */
    max-height: 550px;
    background-color: var(--color-bg-surface);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

/* ============================================================================
   CHAT HEADER
   ============================================================================ */
.chat-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md) var(--spacing-lg);
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    color: var(--color-text-primary);
    border-bottom: 2px solid rgba(255, 255, 255, 0.1);
}

.chat-header-title {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    font-size: 1.25rem;
    font-weight: 600;
}

.chat-header-icon {
    font-size: 1.5rem;
}

.chat-status-indicator {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 0.875rem;
    opacity: 0.9;
}

.chat-status-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background-color: var(--color-normal);
    animation: pulse 2s infinite;
}

.chat-status-dot.offline {
    background-color: var(--color-critical);
    animation: none;
}

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

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

.chat-header-btn {
    background: rgba(255, 255, 255, 0.2);
    border: none;
    color: var(--color-text-primary);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: background var(--transition-fast);
    font-size: 0.875rem;
}

.chat-header-btn:hover {
    background: rgba(255, 255, 255, 0.3);
}

/* ============================================================================
   CHAT MESSAGES AREA
   ============================================================================ */
.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-lg);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    scroll-behavior: smooth;
}

/* Custom Scrollbar */
.chat-messages::-webkit-scrollbar {
    width: 8px;
}

.chat-messages::-webkit-scrollbar-track {
    background: var(--color-bg-dark);
}

.chat-messages::-webkit-scrollbar-thumb {
    background: var(--color-bg-elevated);
    border-radius: 4px;
}

.chat-messages::-webkit-scrollbar-thumb:hover {
    background: #555;
}

/* ============================================================================
   MESSAGE BUBBLES
   ============================================================================ */
.chat-message {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    max-width: 80%;
    animation: slideIn 0.3s ease;
}

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

.chat-message.user {
    align-self: flex-end;
    flex-direction: row-reverse;
}

.chat-message.bot {
    align-self: flex-start;
}

.chat-message-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-size: 1.25rem;
}

.chat-message.user .chat-message-avatar {
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
}

.chat-message.bot .chat-message-avatar {
    background: linear-gradient(135deg, var(--color-accent), var(--color-warning));
}

.chat-message-content {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.chat-message-bubble {
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-lg);
    word-wrap: break-word;
    line-height: 1.5;
}

.chat-message.user .chat-message-bubble {
    background-color: var(--color-user-bubble);
    color: var(--color-bubble-text);
    border-bottom-right-radius: var(--radius-sm);
}

.chat-message.bot .chat-message-bubble {
    background-color: var(--color-bot-bubble);
    color: var(--color-text-primary);
    border-bottom-left-radius: var(--radius-sm);
}

.chat-message-timestamp {
    font-size: 0.75rem;
    color: var(--color-text-secondary);
    padding: 0 var(--spacing-sm);
}

/* ============================================================================
   TYPING INDICATOR
   ============================================================================ */
.chat-typing-indicator {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background-color: var(--color-bg-secondary);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-sm);
}

.chat-typing-dots {
    display: flex;
    gap: var(--spacing-xs);
}

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

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

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

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

/* ============================================================================
   INLINE CHARTS
   ============================================================================ */
.chat-chart-container {
    background-color: var(--color-bg-dark);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    margin-top: var(--spacing-md);
    max-width: 600px;
}

.chat-chart-container canvas {
    max-height: 300px;
    width: 100% !important;
    height: auto !important;
}

/* ============================================================================
   DOWNLOAD BUTTONS
   ============================================================================ */
.chat-download-buttons {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
    flex-wrap: wrap;
}

.chat-download-btn {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: var(--color-primary);
    color: var(--color-text-primary);
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    font-size: 0.875rem;
    text-decoration: none;
}

.chat-download-btn:hover {
    background-color: var(--color-secondary);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(33, 150, 243, 0.4);
}

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

/* ============================================================================
   ML INSIGHTS BADGE
   ============================================================================ */
.chat-ml-insights {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-xs) var(--spacing-sm);
    background-color: rgba(255, 152, 0, 0.2);
    border: 1px solid var(--color-warning);
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    margin-top: var(--spacing-sm);
}

.chat-ml-insights.critical {
    background-color: rgba(244, 67, 54, 0.2);
    border-color: var(--color-critical);
}

.chat-ml-insights.normal {
    background-color: rgba(76, 175, 80, 0.2);
    border-color: var(--color-normal);
}

/* ============================================================================
   CHAT INPUT AREA
   ============================================================================ */
.chat-input-container {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    background-color: var(--color-bg-elevated);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.chat-input-wrapper {
    flex: 1;
    position: relative;
}

.chat-input {
    width: 100%;
    padding: var(--spacing-md);
    padding-right: 40px;
    background-color: var(--color-bg-dark);
    border: 2px solid transparent;
    border-radius: var(--radius-lg);
    color: var(--color-text-primary);
    font-size: 0.9375rem;
    resize: none;
    max-height: 120px;
    transition: border-color var(--transition-fast);
}

.chat-input:focus {
    outline: none;
    border-color: var(--color-primary);
}

.chat-input::placeholder {
    color: var(--color-text-disabled);
}

.chat-input-char-count {
    position: absolute;
    right: var(--spacing-md);
    bottom: var(--spacing-sm);
    font-size: 0.75rem;
    color: var(--color-text-secondary);
}

.chat-send-btn {
    padding: var(--spacing-md) var(--spacing-lg);
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    border: none;
    border-radius: var(--radius-lg);
    color: var(--color-text-primary);
    font-size: 1rem;
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-weight: 600;
}

.chat-send-btn:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(33, 150, 243, 0.4);
}

.chat-send-btn:active:not(:disabled) {
    transform: translateY(0);
}

.chat-send-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    background: var(--color-bg-elevated);
}

/* ============================================================================
   EMPTY STATE
   ============================================================================ */
.chat-empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    text-align: center;
    padding: var(--spacing-xl);
    color: var(--color-text-secondary);
}

.chat-empty-state-icon {
    font-size: 4rem;
    margin-bottom: var(--spacing-lg);
    opacity: 0.5;
}

.chat-empty-state-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    color: var(--color-text-primary);
}

.chat-empty-state-suggestions {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-lg);
    max-width: 400px;
}

.chat-suggestion-chip {
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: var(--color-bg-elevated);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-fast);
    font-size: 0.875rem;
}

.chat-suggestion-chip:hover {
    background-color: var(--color-bg-surface);
    border-color: var(--color-primary);
    transform: translateX(4px);
}

/* ============================================================================
   ERROR STATE
   ============================================================================ */
.chat-error-message {
    padding: var(--spacing-md);
    background-color: rgba(244, 67, 54, 0.1);
    border: 1px solid var(--color-critical);
    border-radius: var(--radius-md);
    color: var(--color-critical);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

/* ============================================================================
   LOADING SKELETON
   ============================================================================ */
.chat-skeleton {
    background: linear-gradient(
        90deg,
        var(--color-bg-elevated) 0%,
        var(--color-bg-surface) 50%,
        var(--color-bg-elevated) 100%
    );
    background-size: 200% 100%;
    animation: skeleton-loading 1.5s ease-in-out infinite;
    border-radius: var(--radius-md);
    height: 60px;
    width: 70%;
}

@keyframes skeleton-loading {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* ============================================================================
   RESPONSIVE DESIGN
   ============================================================================ */
@media (max-width: 768px) {
    #chat-container {
        height: calc(100vh - 150px);
        border-radius: 0;
    }
    
    .chat-message {
        max-width: 90%;
    }
    
    .chat-chart-container {
        max-width: 100%;
    }
    
    .chat-input-container {
        padding: var(--spacing-md);
    }
    
    .chat-header {
        padding: var(--spacing-sm) var(--spacing-md);
    }
    
    .chat-header-title {
        font-size: 1rem;
    }
}

/* ============================================================================
   MARKDOWN SUPPORT (for bot responses)
   ============================================================================ */
.chat-message-bubble h1,
.chat-message-bubble h2,
.chat-message-bubble h3 {
    margin-top: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-primary);
}

.chat-message-bubble h1 { font-size: 1.5rem; }
.chat-message-bubble h2 { font-size: 1.25rem; }
.chat-message-bubble h3 { font-size: 1.1rem; }

.chat-message-bubble p {
    margin-bottom: var(--spacing-sm);
}

.chat-message-bubble ul,
.chat-message-bubble ol {
    margin-left: var(--spacing-lg);
    margin-bottom: var(--spacing-sm);
}

.chat-message-bubble li {
    margin-bottom: var(--spacing-xs);
}

.chat-message-bubble code {
    background-color: rgba(0, 0, 0, 0.3);
    padding: 2px 6px;
    border-radius: var(--radius-sm);
    font-family: 'Consolas', 'Monaco', monospace;
    font-size: 0.875em;
}

.chat-message-bubble pre {
    background-color: rgba(0, 0, 0, 0.3);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    overflow-x: auto;
    margin: var(--spacing-sm) 0;
}

.chat-message-bubble pre code {
    background: none;
    padding: 0;
}

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

.chat-message-bubble em {
    font-style: italic;
}

/* ============================================================================
   UTILITY CLASSES
   ============================================================================ */
.hidden {
    display: none !important;
}

.fade-in {
    animation: fadeIn 0.3s ease;
}

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

.fade-out {
    animation: fadeOut 0.3s ease;
}

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