static/style.css

/* Professional Newsletter Styles */

:root {
    --primary-color: #1976d2;
    --secondary-color: #764ba2;
    --accent-color: #ff9800;
    --success-color: #2e7d32;
    --background-color: #f8f9fa;
    --text-color: #333;
    --border-color: #e0e0e0;
    --shadow: 0 2px 4px rgba(0,0,0,0.1);
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--background-color);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 400;
    margin-bottom: 0.5em;
    line-height: 1.3;
}

h1 { font-size: 2.5em; }
h2 { font-size: 2em; }
h3 { font-size: 1.5em; }
h4 { font-size: 1.2em; }

p {
    margin-bottom: 1em;
}

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color 0.3s ease;
}

a:hover {
    color: var(--secondary-color);
    text-decoration: underline;
}

/* Layout Components */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.card {
    background: white;
    border-radius: 8px;
    box-shadow: var(--shadow);
    padding: 20px;
    margin-bottom: 20px;
}

.btn {
    display: inline-block;
    padding: 12px 24px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 1em;
    transition: all 0.3s ease;
    text-decoration: none;
}

.btn:hover {
    background: var(--secondary-color);
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.2);
}

.btn-secondary {
    background: var(--accent-color);
}

.btn-success {
    background: var(--success-color);
}

/* Professional Data Display */
.data-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin: 20px 0;
}

.metric-card {
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 20px;
    text-align: center;
    transition: transform 0.3s ease;
}

.metric-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

.metric-value {
    font-size: 2em;
    font-weight: bold;
    color: var(--primary-color);
    margin-bottom: 5px;
}

.metric-label {
    color: #666;
    font-size: 0.9em;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Chart Styles */
.chart-wrapper {
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 20px;
    margin: 20px 0;
}

.chart-title {
    font-size: 1.2em;
    font-weight: 500;
    margin-bottom: 15px;
    color: var(--text-color);
}

.chart-container {
    position: relative;
    height: 400px;
    margin: 10px 0;
}

/* Research Source Indicators */
.source-badge {
    display: inline-block;
    background: #e3f2fd;
    color: var(--primary-color);
    padding: 4px 8px;
    border-radius: 15px;
    font-size: 0.8em;
    margin: 2px;
    border: 1px solid var(--primary-color);
}

.credibility-high {
    background: #e8f5e8;
    color: var(--success-color);
    border-color: var(--success-color);
}

.credibility-medium {
    background: #fff3e0;
    color: var(--accent-color);
    border-color: var(--accent-color);
}

.credibility-low {
    background: #ffebee;
    color: #d32f2f;
    border-color: #d32f2f;
}

/* Professional Tables */
.data-table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
    background: white;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: var(--shadow);
}

.data-table th {
    background: var(--primary-color);
    color: white;
    padding: 15px;
    text-align: left;
    font-weight: 500;
}

.data-table td {
    padding: 12px 15px;
    border-bottom: 1px solid var(--border-color);
}

.data-table tr:hover {
    background: #f5f5f5;
}

/* Status Indicators */
.status-indicator {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 4px 8px;
    border-radius: 20px;
    font-size: 0.85em;
    font-weight: 500;
}

.status-success {
    background: #e8f5e8;
    color: var(--success-color);
}

.status-warning {
    background: #fff3e0;
    color: var(--accent-color);
}

.status-error {
    background: #ffebee;
    color: #d32f2f;
}

.status-info {
    background: #e3f2fd;
    color: var(--primary-color);
}

/* Loading States */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid #f3f3f3;
    border-top: 3px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

.loading-text {
    display: flex;
    align-items: center;
    gap: 10px;
    color: #666;
    font-style: italic;
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 0 10px;
    }
    
    .data-grid {
        grid-template-columns: 1fr;
    }
    
    .chart-container {
        height: 300px;
    }
    
    .data-table {
        font-size: 0.9em;
    }
    
    .data-table th,
    .data-table td {
        padding: 8px 10px;
    }
    
    h1 { font-size: 2em; }
    h2 { font-size: 1.5em; }
}

@media (max-width: 480px) {
    .btn {
        padding: 10px 20px;
        font-size: 0.9em;
    }
    
    .metric-value {
        font-size: 1.5em;
    }
    
    .chart-container {
        height: 250px;
    }
}

/* Animation and Transitions */
.fade-in {
    animation: fadeIn 0.5s ease-in;
}

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

.slide-in {
    animation: slideIn 0.3s ease-out;
}

@keyframes slideIn {
    from { transform: translateX(-100%); }
    to { transform: translateX(0); }
}

/* Accessibility */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    border: 0;
}

/* Focus styles for keyboard navigation */
.btn:focus,
a:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

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

/* Print styles */
@media print {
    .btn, .loading, .status-indicator {
        display: none;
    }
    
    .card, .chart-wrapper {
        box-shadow: none;
        border: 1px solid #ccc;
    }
    
    a {
        color: #000;
        text-decoration: underline;
    }
}