/* 
 * NLQ to SPARQL Interactive Chat - Styles
 * 交互式聊天界面样式
 */

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

:root {
    /* Color Palette */
    --primary-color: #2563eb;
    --primary-hover: #1d4ed8;
    --secondary-color: #64748b;
    --success-color: #10b981;
    --error-color: #ef4444;
    --warning-color: #f59e0b;
    
    /* Background Colors */
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    --bg-user: #eff6ff;
    --bg-assistant: #f8fafc;
    --bg-code: #1e293b;
    
    /* Text Colors */
    --text-primary: #0f172a;
    --text-secondary: #64748b;
    --text-tertiary: #94a3b8;
    --text-inverse: #ffffff;
    
    /* Border & Shadow */
    --border-color: #e2e8f0;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(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;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: var(--spacing-lg);
}

/* ===== RAG & Recommendation Colors ===== */
:root {
    --rag-color: #8b5cf6;
    --rag-hover: #7c3aed;
    --rec-color: #ec4899;
    --rec-hover: #db2777;
}

/* ===== Container ===== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    height: calc(100vh - 3rem);
}

/* ===== Header ===== */
.chat-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: var(--text-inverse);
    padding: var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 3px solid rgba(255, 255, 255, 0.2);
}

.header-content h1 {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
}

.header-content .subtitle {
    font-size: 0.9rem;
    opacity: 0.9;
}

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

/* ===== Buttons ===== */
.btn {
    padding: var(--spacing-sm) var(--spacing-md);
    border: none;
    border-radius: var(--radius-md);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.btn-primary {
    background: var(--primary-color);
    color: var(--text-inverse);
}

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

.btn-secondary {
    background: rgba(255, 255, 255, 0.2);
    color: var(--text-inverse);
    backdrop-filter: blur(10px);
}

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

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* ===== Chat Container ===== */
.chat-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

/* ===== Messages Area ===== */
.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-lg);
    background: var(--bg-secondary);
    scroll-behavior: smooth;
}

.chat-messages::-webkit-scrollbar {
    width: 8px;
}

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

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

/* ===== Message Styles ===== */
.message {
    margin-bottom: var(--spacing-lg);
    animation: fadeIn 0.3s ease;
}

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

.message-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.message-header .icon {
    font-size: 1.2rem;
}

.message-header .timestamp {
    margin-left: auto;
}

.message-content {
    background: var(--bg-primary);
    padding: var(--spacing-md);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

/* User Message */
.user-message .message-content {
    background: var(--bg-user);
    border-left: 4px solid var(--primary-color);
}

/* Assistant Message */
.assistant-message .message-content {
    background: var(--bg-assistant);
    border-left: 4px solid var(--success-color);
}

/* System Message */
.system-message .message-content {
    background: var(--bg-tertiary);
    border-left: 4px solid var(--warning-color);
}

/* Error Message */
.error-message .message-content {
    background: #fef2f2;
    border-left: 4px solid var(--error-color);
    color: #991b1b;
}

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

.welcome-message h3 {
    color: var(--primary-color);
    margin-bottom: var(--spacing-md);
}

.welcome-message ul {
    text-align: left;
    list-style-position: inside;
    margin: var(--spacing-md) 0;
}

.welcome-message .example-text {
    font-weight: 600;
    color: var(--text-secondary);
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-sm);
}

.example-questions {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

.example-btn {
    padding: var(--spacing-md);
    background: var(--bg-primary);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 0.2s ease;
    text-align: left;
    font-size: 0.9rem;
}

.example-btn:hover {
    border-color: var(--primary-color);
    background: var(--bg-user);
    transform: translateX(5px);
}

/* ===== Result Display ===== */
.result-summary {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
    margin: var(--spacing-md) 0;
}

.result-icon {
    font-size: 2rem;
}

.result-info h4 {
    font-size: 1rem;
    margin-bottom: var(--spacing-xs);
}

.result-count {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.result-actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

.result-btn {
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 0.85rem;
    transition: all 0.2s ease;
}

.result-btn:hover {
    background: var(--bg-user);
    border-color: var(--primary-color);
}

/* RAG Button - 紫色主题 */
.result-btn.rag-btn {
    border-color: var(--rag-color);
    color: var(--rag-color);
}

.result-btn.rag-btn:hover {
    background: var(--rag-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(139, 92, 246, 0.3);
}

/* Recommendation Button - 粉色主题 */
.result-btn.rec-btn {
    border-color: var(--rec-color);
    color: var(--rec-color);
}

.result-btn.rec-btn:hover {
    background: var(--rec-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(236, 72, 153, 0.3);
}

/* Code Block */
.code-block {
    background: var(--bg-code);
    color: #e2e8f0;
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    overflow-x: auto;
    font-family: 'Courier New', monospace;
    font-size: 0.85rem;
    line-height: 1.5;
    margin: var(--spacing-md) 0;
    position: relative;
}

.code-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-sm);
    padding-bottom: var(--spacing-sm);
    border-bottom: 1px solid #334155;
}

.code-language {
    color: #94a3b8;
    font-size: 0.75rem;
    text-transform: uppercase;
}

.copy-btn {
    background: #334155;
    color: var(--text-inverse);
    border: none;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 0.75rem;
}

.copy-btn:hover {
    background: #475569;
}

/* ===== Input Area ===== */
.chat-input-container {
    padding: var(--spacing-lg);
    background: var(--bg-primary);
    border-top: 1px solid var(--border-color);
}

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

.chat-input {
    flex: 1;
    padding: var(--spacing-md);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    font-size: 0.95rem;
    font-family: inherit;
    resize: vertical;
    min-height: 80px;
    max-height: 200px;
    transition: border-color 0.2s ease;
}

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

.send-btn {
    padding: var(--spacing-md) var(--spacing-lg);
    min-width: 100px;
    height: 80px;
}

.send-icon {
    font-size: 1.2rem;
}

.input-hint {
    font-size: 0.75rem;
    color: var(--text-tertiary);
    margin-top: var(--spacing-sm);
}

/* ===== Status Bar ===== */
.status-bar {
    padding: var(--spacing-sm) var(--spacing-lg);
    background: var(--bg-tertiary);
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.session-info {
    font-family: monospace;
    font-size: 0.8rem;
}

/* ===== Loading Overlay ===== */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    backdrop-filter: blur(4px);
}

.loading-spinner {
    background: var(--bg-primary);
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    text-align: center;
    box-shadow: var(--shadow-lg);
}

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

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

/* ===== Modal ===== */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    backdrop-filter: blur(4px);
}

.modal-content {
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    max-width: 90%;
    max-height: 90vh;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    display: flex;
    flex-direction: column;
}

.modal-header {
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h2 {
    font-size: 1.25rem;
}

.modal-close {
    background: none;
    border: none;
    font-size: 2rem;
    color: var(--text-secondary);
    cursor: pointer;
    line-height: 1;
    padding: 0;
    width: 30px;
    height: 30px;
}

.modal-close:hover {
    color: var(--text-primary);
}

.modal-body {
    padding: var(--spacing-lg);
    overflow-y: auto;
}

/* RAG Analysis Content */
.rag-content {
    line-height: 1.8;
}

.rag-content pre {
    white-space: pre-wrap;
    word-wrap: break-word;
    background: #f8f4ff;
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    border-left: 4px solid var(--rag-color);
    color: var(--text-primary);
}

/* Recommendation Content */
.rec-content {
    line-height: 1.8;
}

.rec-content pre {
    white-space: pre-wrap;
    word-wrap: break-word;
    background: #fef2f7;
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    border-left: 4px solid var(--rec-color);
    color: var(--text-primary);
}

/* Followup Response */
.followup-response {
    padding: var(--spacing-md);
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
    line-height: 1.8;
    white-space: pre-wrap;
}

/* ===== Responsive Design ===== */
@media (max-width: 768px) {
    body {
        padding: 0;
    }
    
    .container {
        border-radius: 0;
        height: 100vh;
    }
    
    .chat-header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-md);
    }
    
    .header-actions {
        width: 100%;
        justify-content: flex-end;
    }
    
    .input-wrapper {
        flex-direction: column;
    }
    
    .send-btn {
        width: 100%;
    }
    
    .modal-content {
        max-width: 95%;
        max-height: 95vh;
    }
}

/* ===== Utility Classes ===== */
.text-center {
    text-align: center;
}

.mt-1 { margin-top: var(--spacing-md); }
.mb-1 { margin-bottom: var(--spacing-md); }
.p-1 { padding: var(--spacing-md); }

.text-primary { color: var(--primary-color); }
.text-success { color: var(--success-color); }
.text-error { color: var(--error-color); }
.text-secondary { color: var(--text-secondary); }

/* ===== Progress Indicator ===== */
.progress-message {
    opacity: 0.95;
}

.progress-indicator {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
    border-left: 4px solid var(--primary-color);
}

.spinner {
    width: 24px;
    height: 24px;
    border: 3px solid var(--border-color);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

.progress-text {
    color: var(--text-secondary);
    font-size: 0.95rem;
    font-weight: 500;
}

/* ===== Export Buttons ===== */
.export-actions {
    margin-top: var(--spacing-md);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--border-color);
}

.export-btn-small {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    padding: 0.4rem 0.8rem;
    margin-right: 0.5rem;
    margin-top: 0.5rem;
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    cursor: pointer;
    transition: all 0.2s;
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
}

.export-btn-small:hover {
    background: var(--primary-color);
    color: var(--text-inverse);
    border-color: var(--primary-color);
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

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

/* ============================================================================
   Progress Display Styles for Streaming
   ============================================================================ */

.progress-message {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border: 2px solid #667eea;
    animation: pulse-glow 2s infinite;
}

@keyframes pulse-glow {
    0%, 100% {
        box-shadow: 0 0 10px rgba(102, 126, 234, 0.3);
    }
    50% {
        box-shadow: 0 0 20px rgba(102, 126, 234, 0.6);
    }
}

/* 进度容器 */
.progress-container {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 15px;
    border-radius: 10px;
    margin: 10px 0;
}

/* 进度条 */
.progress-bar {
    width: 100%;
    height: 20px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 10px;
    overflow: hidden;
    margin: 10px 0;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, #00d2ff 0%, #3a7bd5 100%);
    width: 0%;
    transition: width 0.3s ease;
}

/* 进度消息 */
.progress-messages {
    max-height: 300px;
    overflow-y: auto;
    background: rgba(0, 0, 0, 0.1);
    border-radius: 5px;
    padding: 10px;
    margin-top: 10px;
}

.progress-message {
    padding: 5px 0;
    font-size: 0.9em;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.progress-message:last-child {
    border-bottom: none;
}

.progress-message.info {
    color: #e0e0e0;
}

.progress-message.progress {
    color: #90caf9;
}

.progress-message.success {
    color: #81c784;
    font-weight: bold;
}

.progress-message.error {
    color: #ef5350;
    font-weight: bold;
}

/* 进度消息滚动条 */
.progress-messages::-webkit-scrollbar {
    width: 6px;
}

.progress-messages::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.3);
    border-radius: 3px;
}

.progress-error {
    color: #ff6b6b;
    font-weight: 600;
    border-left-color: #ff6b6b;
    background: rgba(255, 107, 107, 0.1);
}

.progress-log::-webkit-scrollbar {
    width: 8px;
}

.progress-log::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
}

.progress-log::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.3);
    border-radius: 4px;
}

.progress-log::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.5);
}