/* ==================================
   CNA Assistant Chat Interface CSS
   ================================== */

/* Screen reader only class */
.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;
}

/* Skip link for keyboard navigation */
.skip-link {
    position: absolute;
    top: -40px;
    left: 6px;
    background: var(--primary-color);
    color: white;
    padding: 8px;
    text-decoration: none;
    border-radius: 4px;
    z-index: 100;
}

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

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

/* High contrast mode support */
@media (prefers-contrast: high) {
    :root {
        --primary-color: #000;
        --text-primary: #000;
        --bg-primary: #fff;
        --border-light: #000;
    }
}

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

:root {
    /* Colors */
    --primary-color: #1e40af;
    --primary-light: #3b82f6;
    --primary-dark: #1e3a8a;
    --secondary-color: #f8fafc;
    --accent-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    
    /* Text Colors */
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --text-light: #9ca3af;
    --text-white: #ffffff;
    
    /* Background Colors */
    --bg-primary: #ffffff;
    --bg-secondary: #f9fafb;
    --bg-dark: #111827;
    --bg-card: #ffffff;
    --bg-hover: #f3f4f6;
    
    /* Border Colors */
    --border-light: #e5e7eb;
    --border-medium: #d1d5db;
    --border-focus: #3b82f6;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    
    /* Accessibility colors */
    --focus-color: #3b82f6;
    --focus-offset: 2px;
    
    /* Transitions */
    --transition-fast: 0.15s ease-in-out;
    --transition-normal: 0.3s ease-in-out;
    --transition-slow: 0.5s ease-in-out;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: var(--spacing-md);
    color: var(--text-primary);
    line-height: 1.6;
}

/* Chat Container */
.chat-container {
    max-width: 800px;
    margin: 0 auto;
    height: calc(100vh - 2rem);
    background: var(--bg-card);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    position: relative;
}

/* Header */
.chat-header {
    background: var(--primary-color);
    color: var(--text-white);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-md);
    position: relative;
    z-index: 10;
}

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

.header-logo {
    display: flex;
    align-items: center;
}

.logo-img {
    height: 100px;
    width: auto;
    object-fit: contain;
}

.avatar-icon {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    object-fit: cover;
}

.avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    backdrop-filter: blur(10px);
}

.header-info {
    flex: 1;
}

.header-info h1 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

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

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

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

.btn-clear,
.btn-settings {
    width: 40px;
    height: 40px;
    border: none;
    border-radius: var(--radius-md);
    background: rgba(255, 255, 255, 0.15);
    color: var(--text-white);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-fast);
    backdrop-filter: blur(10px);
}

.btn-clear:hover,
.btn-settings:hover {
    background: rgba(255, 255, 255, 0.25);
    transform: translateY(-1px);
}

/* Settings Panel */
.settings-panel {
    position: absolute;
    top: 0;
    right: 0;
    width: 320px;
    height: 100%;
    background: var(--bg-card);
    box-shadow: var(--shadow-xl);
    transform: translateX(100%);
    transition: var(--transition-normal);
    z-index: 20;
    border-radius: 0 var(--radius-xl) var(--radius-xl) 0;
}

.settings-panel.open {
    transform: translateX(0);
}

.settings-content {
    padding: var(--spacing-xl);
    height: 100%;
    display: flex;
    flex-direction: column;
}

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

.setting-group {
    margin-bottom: var(--spacing-lg);
}

.setting-group label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-weight: 500;
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.setting-group input {
    width: 100%;
    padding: var(--spacing-md);
    border: 2px solid var(--border-light);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    transition: var(--transition-fast);
}

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

.btn-new-session {
    margin-top: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--secondary-color);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 0.75rem;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.btn-new-session:hover {
    background: var(--bg-hover);
}

.setting-actions {
    margin-top: auto;
    display: flex;
    gap: var(--spacing-sm);
}

.btn-test,
.btn-close {
    flex: 1;
    padding: var(--spacing-md);
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-weight: 500;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
}

.btn-test {
    background: var(--accent-color);
    color: var(--text-white);
}

.btn-test:hover {
    background: #059669;
}

.btn-close {
    background: var(--bg-secondary);
    color: var(--text-secondary);
}

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

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

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

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

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

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

/* Message Styles */
.message {
    display: flex;
    gap: var(--spacing-md);
    max-width: 80%;
    animation: slideInUp 0.3s ease-out;
}

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

.message.assistant {
    align-self: flex-start;
}

.message-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.125rem;
    flex-shrink: 0;
}

.message.assistant .message-avatar {
    background: linear-gradient(135deg, var(--primary-light), var(--primary-color));
    color: var(--text-white);
}

.message.user .message-avatar {
    background: linear-gradient(135deg, var(--accent-color), #059669);
    color: var(--text-white);
}

.message-content {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md) var(--spacing-lg);
    position: relative;
    min-width: 0;
    word-wrap: break-word;
}

.message.user .message-content {
    background: var(--primary-color);
    color: var(--text-white);
}

.message.assistant.welcome .message-content {
    background: linear-gradient(135deg, var(--accent-color), #059669);
    color: var(--text-white);
}

.message-content p {
    margin: 0 0 var(--spacing-sm) 0;
    line-height: 1.6;
}

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

/* Markdown Elements Styling */
.message-content h1,
.message-content h2,
.message-content h3,
.message-content h4,
.message-content h5,
.message-content h6 {
    margin: var(--spacing-md) 0 var(--spacing-sm) 0;
    font-weight: 600;
    line-height: 1.4;
}

.message-content h1 { font-size: 1.25rem; }
.message-content h2 { font-size: 1.125rem; }
.message-content h3 { font-size: 1.0625rem; }
.message-content h4,
.message-content h5,
.message-content h6 { font-size: 1rem; }

.message-content h1:first-child,
.message-content h2:first-child,
.message-content h3:first-child {
    margin-top: 0;
}

.message-content strong {
    font-weight: 600;
    color: inherit;
}

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

.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 ul li {
    list-style-type: disc;
}

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

.message-content blockquote {
    margin: var(--spacing-md) 0;
    padding: var(--spacing-md);
    border-left: 4px solid var(--primary-color);
    background: rgba(0, 0, 0, 0.05);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.message-content code {
    background: rgba(0, 0, 0, 0.1);
    padding: 2px 6px;
    border-radius: 3px;
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
    font-size: 0.875em;
}

.message-content pre {
    background: rgba(0, 0, 0, 0.1);
    padding: var(--spacing-md);
    border-radius: var(--radius-sm);
    overflow-x: auto;
    margin: var(--spacing-md) 0;
}

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

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

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

.message-content hr {
    border: none;
    border-top: 1px solid var(--border-light);
    margin: var(--spacing-lg) 0;
}

.message-content table {
    width: 100%;
    border-collapse: collapse;
    margin: var(--spacing-md) 0;
    font-size: 0.875rem;
}

.message-content th,
.message-content td {
    padding: var(--spacing-sm);
    text-align: left;
    border-bottom: 1px solid var(--border-light);
}

.message-content th {
    font-weight: 600;
    background: var(--bg-secondary);
}

/* User message markdown styling */
.message.user .message-content strong {
    color: rgba(255, 255, 255, 0.95);
}

.message.user .message-content code {
    background: rgba(255, 255, 255, 0.2);
    color: rgba(255, 255, 255, 0.95);
}

.message.user .message-content pre {
    background: rgba(255, 255, 255, 0.15);
}

.message.user .message-content blockquote {
    border-left-color: rgba(255, 255, 255, 0.5);
    background: rgba(255, 255, 255, 0.1);
}

.message.user .message-content a {
    color: rgba(255, 255, 255, 0.9);
}

.message.user .message-content a:hover {
    border-bottom-color: rgba(255, 255, 255, 0.9);
}

.message-time {
    font-size: 0.75rem;
    margin-top: var(--spacing-sm);
    opacity: 0.7;
}

/* Suggested Questions */
.suggested-questions {
    margin-top: var(--spacing-lg);
    padding: var(--spacing-lg);
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    border-left: 4px solid var(--primary-color);
}

.suggested-questions p {
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    font-size: 0.875rem;
}

.suggestions {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-sm);
}

.suggestion-btn {
    padding: var(--spacing-md);
    background: var(--bg-card);
    border: 2px solid var(--border-light);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition-fast);
    font-size: 0.875rem;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    text-align: left;
}

.suggestion-btn:hover {
    border-color: var(--primary-color);
    background: var(--primary-color);
    color: var(--text-white);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

/* Typing Indicator */
.typing-indicator {
    display: none;
    gap: var(--spacing-md);
    padding: 0 var(--spacing-lg) var(--spacing-lg);
    animation: slideInUp 0.3s ease-out;
}

.typing-indicator.show {
    display: flex;
}

.typing-content {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md) var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.typing-animation {
    display: flex;
    gap: 3px;
}

.typing-animation span {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--text-light);
    animation: typing 1.4s infinite;
}

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

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

.typing-text {
    color: var(--text-light);
    font-size: 0.875rem;
    font-style: italic;
}

/* Chat Input */
.chat-input-container {
    padding: var(--spacing-lg);
    background: var(--bg-card);
    border-top: 1px solid var(--border-light);
}

.chat-input {
    display: flex;
    gap: var(--spacing-md);
    align-items: flex-end;
    background: var(--bg-secondary);
    border: 2px solid var(--border-light);
    border-radius: var(--radius-xl);
    padding: var(--spacing-md);
    transition: var(--transition-fast);
}

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

.chat-input textarea {
    flex: 1;
    border: none;
    background: transparent;
    resize: none;
    outline: none;
    font-family: inherit;
    font-size: 1rem;
    line-height: 1.5;
    max-height: 120px;
    min-height: 24px;
}

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

.send-button {
    width: 44px;
    height: 44px;
    border: none;
    border-radius: 50%;
    background: var(--primary-color);
    color: var(--text-white);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-fast);
    flex-shrink: 0;
}

.send-button:hover:not(:disabled) {
    background: var(--primary-dark);
    transform: scale(1.05);
}

.send-button:disabled {
    background: var(--text-light);
    cursor: not-allowed;
    transform: none;
}

.input-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: var(--spacing-sm);
    font-size: 0.75rem;
    color: var(--text-light);
}

.char-counter {
    font-weight: 500;
}

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

.input-hint kbd {
    background: var(--bg-secondary);
    border: 1px solid var(--border-medium);
    border-radius: 3px;
    padding: 2px 6px;
    font-size: 0.6875rem;
    font-family: monospace;
}

/* Toast Notifications */
.toast-container {
    position: fixed;
    top: var(--spacing-lg);
    right: var(--spacing-lg);
    z-index: 1000;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.toast {
    background: var(--bg-card);
    border-radius: var(--radius-md);
    padding: var(--spacing-md) var(--spacing-lg);
    box-shadow: var(--shadow-lg);
    border-left: 4px solid var(--accent-color);
    animation: slideInRight 0.3s ease-out;
    max-width: 320px;
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.toast.error {
    border-left-color: var(--danger-color);
}

.toast.warning {
    border-left-color: var(--warning-color);
}

.toast-icon {
    font-size: 1.125rem;
}

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

.toast.error .toast-icon {
    color: var(--danger-color);
}

.toast.warning .toast-icon {
    color: var(--warning-color);
}

.toast-content {
    flex: 1;
}

.toast-title {
    font-weight: 600;
    margin-bottom: 2px;
    font-size: 0.875rem;
}

.toast-message {
    color: var(--text-secondary);
    font-size: 0.75rem;
}

/* Loading Overlay */
.loading-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.95);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 100;
    backdrop-filter: blur(5px);
}

.loading-overlay.show {
    display: flex;
}

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

.spinner {
    width: 50px;
    height: 50px;
    border: 4px solid var(--border-light);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto var(--spacing-md);
}

.loading-spinner p {
    color: var(--text-secondary);
    font-weight: 500;
}

/* Animations */
@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(100%);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

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

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

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* Responsive Design */
@media (max-width: 768px) {
    body {
        padding: 0;
    }
    
    .chat-container {
        height: 100vh;
        border-radius: 0;
        max-width: none;
    }
    
    .settings-panel {
        width: 100%;
        border-radius: 0;
    }
    
    .message {
        max-width: 90%;
    }
    
    .suggestions {
        grid-template-columns: 1fr;
    }
    
    .input-hint {
        display: none;
    }
    
    .toast-container {
        left: var(--spacing-md);
        right: var(--spacing-md);
    }
    
    .toast {
        max-width: none;
    }
}

@media (max-width: 480px) {
    .header-content {
        gap: var(--spacing-sm);
    }

    .header-info h1 {
        font-size: 1.25rem;
    }

    .logo-img {
        height: 50px;
    }

    .chat-messages,
    .chat-input-container {
        padding: var(--spacing-md);
    }

    .suggested-questions {
        padding: var(--spacing-md);
    }
}

/* ==================================
   Streaming Support Styles
   ================================== */

/* Status messages for streaming feedback */
.status-message {
    opacity: 0.8;
    background: linear-gradient(135deg, var(--bg-secondary), var(--bg-hover));
    border-left: 3px solid var(--primary-color);
}

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

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

/* Streaming message styles */
.message.streaming {
    /* Keep same appearance as normal messages */
}

/* Typing cursor animation */
.typing-cursor {
    color: var(--primary-color);
    font-weight: bold;
    animation: blink 1s step-end infinite;
}

@keyframes blink {
    0%, 50% { opacity: 1; }
    51%, 100% { opacity: 0; }
}

@keyframes pulse {
    0%, 100% { opacity: 0.8; }
    50% { opacity: 1; }
}

/* Enhanced loading states */
.message.assistant.status-message .message-avatar i {
    animation: spin 2s linear infinite;
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* Tool usage indicators */
.status-text:contains("🔍") {
    color: var(--accent-color);
    font-weight: 500;
}

.status-text:contains("📝") {
    color: var(--warning-color);
    font-weight: 500;
}

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

.status-text:contains("⚙️") {
    color: var(--text-secondary);
    font-weight: 500;
}

/* Smooth transitions for streaming */
.message.streaming .message-content {
    /* Subtle indicator for streaming without changing layout */
    border-left: 2px solid var(--primary-color);
}

/* Dark mode disabled - using light theme always for better readability */

/* Print styles */
@media print {
    .chat-header,
    .chat-input-container,
    .settings-panel,
    .toast-container,
    .loading-overlay {
        display: none !important;
    }
    
    .chat-container {
        box-shadow: none;
        border: 1px solid var(--border-light);
    }
    
    .message {
        break-inside: avoid;
    }
}