frontend/style.css

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

:root {
    --bg-primary: #0A0A0A;
    --bg-secondary: #141414;
    --bg-tertiary: #1E1E1E;
    --bg-hover: #252525;
    --border-color: #2A2A2A;
    --text-primary: #E5E5E5;
    --text-secondary: #A0A0A0;
    --text-muted: #6B6B6B;
    --accent-blue: #3B82F6;
    --accent-blue-hover: #2563EB;
    --accent-yellow: #F59E0B;
    --accent-red: #EF4444;
    --accent-green: #10B981;
    --accent-purple: #8B5CF6;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
}

/* Top Navigation */
.top-nav {
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    padding: 12px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-left .logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-title {
    font-size: 16px;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.2;
}

.logo-subtitle {
    font-size: 11px;
    font-weight: 400;
    color: var(--text-secondary);
    margin-top: 2px;
}

.nav-right {
    display: flex;
    align-items: center;
    gap: 8px;
}

.icon-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    padding: 8px;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
}

.icon-btn:hover {
    background-color: var(--bg-hover);
    color: var(--text-primary);
}

.user-btn .user-avatar {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: linear-gradient(135deg, #3B82F6 0%, #2563EB 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 13px;
    font-weight: 600;
    color: white;
}

/* Main Container */
.main-container {
    display: grid;
    grid-template-columns: 490px 1fr;
    height: calc(100vh - 57px);
    gap: 0;
}

/* Left Panel */
.left-panel {
    background-color: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    padding: 32px 24px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.panel-title {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

/* Query Box */
.query-box {
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 16px;
}

#queryInput {
    width: 100%;
    background-color: transparent;
    border: none;
    color: var(--text-primary);
    font-size: 14px;
    font-family: inherit;
    resize: none;
    outline: none;
    line-height: 1.6;
    margin-bottom: 16px;
    min-height: 120px;
}

#queryInput::placeholder {
    color: var(--text-muted);
}

.submit-button {
    width: 100%;
    background-color: var(--accent-blue);
    color: white;
    border: none;
    padding: 12px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.submit-button:hover:not(:disabled) {
    background-color: var(--accent-blue-hover);
}

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

/* Examples Section */
.examples-section {
    margin-top: 8px;
}

.examples-section h3 {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 12px;
    font-weight: 600;
}

.example-queries-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.example-item {
    color: var(--text-muted);
    font-size: 13px;
    cursor: pointer;
    padding: 10px 12px;
    border-radius: 6px;
    transition: all 0.2s;
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
}

.example-item:hover {
    background-color: var(--bg-hover);
    color: var(--text-secondary);
    border-color: var(--accent-blue);
}

/* Recent Queries */
.recent-queries {
    margin-top: 16px;
}

.recent-queries h3 {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 12px;
    font-weight: 600;
}

.history-dropdown {
    width: 100%;
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 10px 12px;
    border-radius: 8px;
    font-size: 13px;
    cursor: pointer;
    outline: none;
    transition: border-color 0.2s;
}

.history-dropdown:focus {
    border-color: var(--accent-blue);
}

.history-dropdown option {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
    padding: 8px;
}

/* Right Panel */
.right-panel {
    background-color: var(--bg-primary);
    padding: 32px 48px;
    overflow-y: auto;
    position: relative;
}

/* Loading State - Overlay style for follow-up questions */
.loading-state {
    position: fixed;
    bottom: 24px;
    right: 24px;
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--text-primary);
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    padding: 12px 20px;
    border-radius: 8px;
    font-size: 14px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    z-index: 100;
}

.loading-spinner {
    width: 20px;
    height: 20px;
    border: 2px solid var(--border-color);
    border-top-color: var(--accent-blue);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* Initial Empty State */
.initial-state {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100%;
    min-height: 400px;
}

.empty-state {
    text-align: center;
    color: var(--text-muted);
}

.empty-state svg {
    margin-bottom: 16px;
    opacity: 0.5;
}

.empty-state p {
    font-size: 15px;
}

/* Answer Content */
.answer-content {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 24px;
    margin-top: 16px;
    line-height: 1.8;
    font-size: 14px;
    color: var(--text-primary);
}

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

.answer-content .highlight-number {
    background-color: var(--accent-yellow);
    color: var(--bg-primary);
    padding: 2px 6px;
    border-radius: 4px;
    font-weight: 700;
    font-size: 13px;
}

.answer-content .metric-red {
    color: var(--accent-red);
    font-weight: 600;
}

.answer-content .metric-green {
    color: var(--accent-green);
    font-weight: 600;
}

/* ============================================
   ENHANCED FORMATTING STYLES
   ============================================ */

/* Mathematical Formulas */
.math-formula {
    background: rgba(139, 92, 246, 0.1);
    border-left: 3px solid var(--accent-purple);
    padding: 1rem 1.5rem;
    margin: 1rem 0;
    border-radius: 0.5rem;
    font-family: 'Courier New', monospace;
    font-size: 1.1rem;
    color: var(--text-primary);
    font-weight: 500;
    line-height: 1.6;
}

.math-inline {
    background: rgba(139, 92, 246, 0.15);
    padding: 0.2rem 0.5rem;
    border-radius: 0.25rem;
    font-family: 'Courier New', monospace;
    color: #c4b5fd;
    font-weight: 500;
}

/* Section Headers */
.answer-header {
    color: var(--accent-blue);
    font-size: 1.1rem;
    font-weight: 600;
    margin: 1.5rem 0 0.75rem 0;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid rgba(59, 130, 246, 0.3);
}

.section-header {
    color: var(--accent-green);
    font-size: 1rem;
    font-weight: 600;
    margin: 1rem 0 0.5rem 0;
}

/* Financial Values - Enhanced */
.currency-value {
    color: var(--accent-green);
    font-weight: 600;
    background: rgba(16, 185, 129, 0.1);
    padding: 0.1rem 0.3rem;
    border-radius: 0.25rem;
}

.percentage-value {
    color: #34d399;
    font-weight: 600;
    background: rgba(52, 211, 153, 0.1);
    padding: 0.1rem 0.3rem;
    border-radius: 0.25rem;
}

.ratio-value {
    color: var(--accent-blue);
    font-weight: 600;
    background: rgba(96, 165, 250, 0.1);
    padding: 0.1rem 0.3rem;
    border-radius: 0.25rem;
}

/* Citation Styling - Enhanced */
.citation {
    background: rgba(59, 130, 246, 0.2);
    color: #60a5fa;
    padding: 0.125rem 0.375rem;
    border-radius: 0.25rem;
    font-size: 0.875rem;
    font-weight: 600;
    white-space: nowrap;
}

/* List Items */
.list-item {
    margin: 0.75rem 0;
    padding-left: 1rem;
}

.bullet-point {
    color: var(--accent-blue);
    margin-right: 0.5rem;
    font-weight: 600;
}

/* Calculation Boxes */
.calculation-box {
    background-color: var(--bg-tertiary);
    border-left: 3px solid var(--accent-blue);
    padding: 16px;
    margin: 16px 0;
    border-radius: 6px;
}

.calculation-box h4 {
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 8px;
    font-weight: 600;
}

.calculation-step {
    font-family: 'Courier New', monospace;
    color: var(--text-primary);
    font-size: 13px;
    margin: 4px 0;
}

/* Expanded Queries */
.expanded-section {
    margin: 24px 0;
    padding: 16px;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
}

.expanded-section h3 {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 12px;
    font-weight: 600;
}

.expanded-section ul {
    list-style: none;
    padding: 0;
}

.expanded-section li {
    padding: 8px 0;
    color: var(--text-secondary);
    font-size: 13px;
}

.expanded-section li:before {
    content: "→ ";
    color: var(--accent-blue);
    margin-right: 8px;
}

/* Sources Section */
.sources-section {
    margin-top: 32px;
}

.sources-title {
    font-size: 16px;
    color: var(--text-primary);
    margin-bottom: 16px;
    font-weight: 600;
}

.sources-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

/* Source Card */
.source-card {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    overflow: hidden;
    transition: all 0.2s;
}

.source-card:hover {
    border-color: var(--accent-blue);
}

.source-header {
    padding: 16px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    user-select: none;
}

.source-title {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 8px;
}

.source-badge {
    background-color: var(--accent-blue);
    color: white;
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 11px;
    font-weight: 600;
}

.source-similarity {
    font-size: 13px;
    color: var(--text-secondary);
}

.source-similarity strong {
    color: var(--accent-green);
}

.source-content {
    padding: 0 16px 16px 16px;
    display: none;
}

.source-card.expanded .source-content {
    display: block;
}

.source-details {
    margin-bottom: 12px;
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.source-detail {
    font-size: 12px;
    color: var(--text-muted);
}

.source-detail strong {
    color: var(--text-secondary);
}

.source-preview {
    background-color: var(--bg-tertiary);
    padding: 12px;
    border-radius: 6px;
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.6;
    font-style: italic;
}

.view-context-btn {
    margin-top: 8px;
    color: var(--accent-blue);
    background: none;
    border: none;
    font-size: 12px;
    cursor: pointer;
    padding: 4px 0;
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.view-context-btn:hover {
    text-decoration: underline;
}

/* Error Toast */
.error-toast {
    position: fixed;
    bottom: 24px;
    right: 24px;
    background-color: var(--accent-red);
    color: white;
    padding: 16px 24px;
    border-radius: 8px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
    z-index: 1000;
    animation: slideIn 0.3s ease-out;
}

@keyframes slideIn {
    from {
        transform: translateY(100px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

/* Loader Spinner */
.loader {
    width: 16px;
    height: 16px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-primary);
}

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

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

/* Responsive Design */
@media (max-width: 1200px) {
    .main-container {
        grid-template-columns: 420px 1fr;
    }
    
    .right-panel {
        padding: 24px 32px;
    }
}

@media (max-width: 968px) {
    .main-container {
        grid-template-columns: 1fr;
        height: auto;
    }
    
    .left-panel {
        border-right: none;
        border-bottom: 1px solid var(--border-color);
    }
    
    .right-panel {
        min-height: calc(100vh - 57px);
    }
    
    .logo-subtitle {
        display: none;
    }
    
    .math-formula {
        font-size: 1rem;
        padding: 0.75rem 1rem;
    }
}

/* Print Styles */
@media print {
    .top-nav,
    .left-panel,
    .source-card {
        display: none;
    }
    
    .main-container {
        grid-template-columns: 1fr;
    }
    
    .right-panel {
        padding: 20px;
    }
    
    .math-formula {
        border: 1px solid #ccc;
        page-break-inside: avoid;
    }
}