* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --copilot-blue: #0969da;
    --copilot-green: #1a7f37;
    --copilot-gray: #57606a;
    --copilot-light: #f6f8fa;
    --copilot-border: #d0d7de;
    --copilot-shadow: rgba(9, 105, 218, 0.1);
    --copilot-shadow-dark: rgba(0, 0, 0, 0.1);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue', sans-serif;
    background: linear-gradient(135deg, #f6f8fa 0%, #eaeef2 100%);
    color: #24292f;
    line-height: 1.6;
    min-height: 100vh;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 40px 20px;
}

/* Header */
header {
    text-align: center;
    margin-bottom: 50px;
    background: white;
    padding: 40px 20px;
    border-radius: 12px;
    box-shadow: 0 2px 8px var(--copilot-shadow-dark);
}

header h1 {
    font-size: 2.5em;
    margin-bottom: 10px;
    color: #0969da;
}

.subtitle {
    font-size: 1.1em;
    color: var(--copilot-gray);
    margin-bottom: 15px;
}

.last-updated {
    font-size: 0.9em;
    color: #57606a;
    font-style: italic;
}

/* Metrics Grid */
.metrics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
    margin-bottom: 40px;
}

.metric-card {
    background: white;
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 2px 8px var(--copilot-shadow-dark);
    text-align: center;
    border-top: 4px solid #d0d7de;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.metric-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.15);
}

.metric-card.copilot {
    border-top-color: var(--copilot-green);
}

.metric-card.without {
    border-top-color: #d1444a;
}

.metric-card.improvement {
    border-top-color: var(--copilot-blue);
}

.metric-card.review-yes {
    border-top-color: #0a7ea4;
}

.metric-card.review-no {
    border-top-color: #8957e5;
}

.metric-card.review-improvement {
    border-top-color: #6f42c1;
}

.metric-label {
    font-size: 0.9em;
    color: var(--copilot-gray);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 10px;
    font-weight: 600;
}

.metric-value {
    font-size: 2.5em;
    font-weight: bold;
    margin: 15px 0;
}

.metric-card.copilot .metric-value {
    color: var(--copilot-green);
}

.metric-card.without .metric-value {
    color: #d1444a;
}

.metric-card.improvement .metric-value {
    color: var(--copilot-blue);
}

.metric-card.review-yes .metric-value {
    color: #0a7ea4;
}

.metric-card.review-no .metric-value {
    color: #8957e5;
}

.metric-card.review-improvement .metric-value {
    color: #6f42c1;
}

.metric-unit {
    font-size: 0.9em;
    color: var(--copilot-gray);
    margin-bottom: 10px;
}

.metric-count {
    font-size: 0.85em;
    color: #57606a;
    background: var(--copilot-light);
    padding: 8px 12px;
    border-radius: 6px;
    margin-top: 15px;
}

/* Charts Section */
.charts-section {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 30px;
    margin-bottom: 40px;
}

.chart-container {
    background: white;
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 2px 8px var(--copilot-shadow-dark);
}

.chart-container h2 {
    margin-bottom: 25px;
    color: #24292f;
    font-size: 1.3em;
}

canvas {
    max-height: 400px;
}

/* PR Lists */
.pr-lists {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 30px;
    margin-bottom: 40px;
}

.pr-list-container {
    background: white;
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 2px 8px var(--copilot-shadow-dark);
}

.pr-list-container h2 {
    margin-bottom: 20px;
    color: #24292f;
    font-size: 1.2em;
}

.pr-list {
    max-height: 500px;
    overflow-y: auto;
}

.pr-item {
    padding: 15px;
    border-left: 4px solid #d0d7de;
    margin-bottom: 12px;
    border-radius: 4px;
    background: var(--copilot-light);
    transition: all 0.3s ease;
}

.pr-item:hover {
    background: #f0f2f5;
    border-left-color: var(--copilot-blue);
}

.pr-item.copilot {
    border-left-color: var(--copilot-green);
}

.pr-item.no-copilot {
    border-left-color: #d1444a;
}

.pr-item-title {
    font-weight: 600;
    color: #0969da;
    margin-bottom: 5px;
    font-size: 0.95em;
}

.pr-item-number {
    display: inline-block;
    background: var(--copilot-blue);
    color: white;
    padding: 2px 8px;
    border-radius: 3px;
    font-size: 0.8em;
    margin-right: 8px;
}

.pr-item-meta {
    font-size: 0.85em;
    color: var(--copilot-gray);
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 8px;
}

.pr-item-days {
    font-weight: 600;
    font-size: 0.9em;
}

.pr-item-copilot .pr-item-days {
    color: var(--copilot-green);
}

.pr-item-no-copilot .pr-item-days {
    color: #d1444a;
}

.pr-review-badge {
    display: inline-block;
    margin-left: 8px;
    padding: 2px 8px;
    border-radius: 999px;
    font-size: 0.75em;
    font-weight: 600;
}

.pr-review-badge.review-yes {
    background: rgba(10, 126, 164, 0.12);
    color: #0a7ea4;
}

.pr-review-badge.review-no {
    background: rgba(137, 87, 229, 0.12);
    color: #8957e5;
}

/* Statistics Section */
.stats-section {
    background: white;
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 2px 8px var(--copilot-shadow-dark);
    margin-bottom: 40px;
}

.stats-section h2 {
    margin-bottom: 25px;
    color: #24292f;
    font-size: 1.3em;
}

.stats-table {
    width: 100%;
    border-collapse: collapse;
}

.stats-table thead {
    background: var(--copilot-light);
}

.stats-table th {
    padding: 15px;
    text-align: left;
    font-weight: 600;
    color: #24292f;
    border-bottom: 2px solid var(--copilot-border);
}

.stats-table td {
    padding: 15px;
    border-bottom: 1px solid var(--copilot-border);
}

.stats-table tbody tr:hover {
    background: var(--copilot-light);
}

.copilot-stat {
    color: var(--copilot-green);
    font-weight: 600;
}

.no-copilot-stat {
    color: #d1444a;
    font-weight: 600;
}

.review-yes-stat {
    color: #0a7ea4;
    font-weight: 600;
}

.review-no-stat {
    color: #8957e5;
    font-weight: 600;
}

.stats-subheader {
    margin: 30px 0 15px;
    font-size: 1.1em;
    color: #24292f;
}

/* Footer */
footer {
    text-align: center;
    padding: 30px;
    color: var(--copilot-gray);
    border-top: 1px solid var(--copilot-border);
    margin-top: 50px;
}

footer p {
    margin: 5px 0;
    font-size: 0.9em;
}

footer code {
    background: var(--copilot-light);
    padding: 2px 6px;
    border-radius: 3px;
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
}

/* Scrollbar Styling */
.pr-list::-webkit-scrollbar {
    width: 8px;
}

.pr-list::-webkit-scrollbar-track {
    background: var(--copilot-light);
    border-radius: 10px;
}

.pr-list::-webkit-scrollbar-thumb {
    background: var(--copilot-border);
    border-radius: 10px;
}

.pr-list::-webkit-scrollbar-thumb:hover {
    background: #bdc4cc;
}

/* Responsive */
@media (max-width: 768px) {
    header h1 {
        font-size: 1.8em;
    }

    .metrics-grid {
        grid-template-columns: 1fr;
    }

    .charts-section,
    .pr-lists {
        grid-template-columns: 1fr;
    }

    .stats-table {
        font-size: 0.9em;
    }

    .stats-table th,
    .stats-table td {
        padding: 10px;
    }
}