:root {
    --bg: #f8f9fa;
    --card: #ffffff;
    --text: #1a1a2e;
    --muted: #6c757d;
    --accent: #1a73e8;
    --accent-hover: #1557b0;
    --success: #28a745;
    --danger: #dc3545;
    --border: #dee2e6;
    --radius: 6px;
}
* { box-sizing: border-box; }
body {
    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    margin: 0; background: var(--bg); color: var(--text); line-height: 1.5;
}
.navbar {
    display: flex; justify-content: space-between; align-items: center;
    background: var(--card); border-bottom: 1px solid var(--border);
    padding: 0 24px; height: 56px; position: sticky; top: 0; z-index: 100;
}
.nav-brand { font-weight: 700; font-size: 18px; }
.nav-links a {
    color: var(--muted); text-decoration: none; margin-left: 20px;
    font-size: 14px; font-weight: 500;
}
.nav-links a.active, .nav-links a:hover { color: var(--accent); }
.container { max-width: 1200px; margin: 24px auto; padding: 0 24px; }
.card {
    background: var(--card); border: 1px solid var(--border);
    border-radius: var(--radius); padding: 20px; margin-bottom: 20px;
}
h1, h2 { margin-top: 0; }
table {
    width: 100%; border-collapse: collapse; font-size: 14px; margin-top: 12px;
}
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--border); }
th { background: #f1f3f5; font-weight: 600; font-size: 12px; text-transform: uppercase; color: var(--muted); }
tr:hover { background: #f8f9fa; }
.badge {
    display: inline-block; padding: 3px 10px; border-radius: 4px;
    font-size: 12px; font-weight: 600;
}
.badge-green { background: #d4edda; color: #155724; }
.badge-red { background: #f8d7da; color: #721c24; }
.badge-blue { background: #cce5ff; color: #004085; }
.btn {
    display: inline-block; padding: 8px 16px; border: none;
    border-radius: var(--radius); background: var(--accent); color: #fff;
    font-size: 14px; cursor: pointer; text-decoration: none;
}
.btn:hover { background: var(--accent-hover); }
.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-size: 13px; font-weight: 600; margin-bottom: 6px; }
.form-group input, .form-group select {
    width: 100%; padding: 8px 12px; border: 1px solid var(--border);
    border-radius: var(--radius); font-size: 14px;
}
.score-big { font-size: 36px; font-weight: 700; }
.positive { color: var(--success); }
.negative { color: var(--danger); }
.chart-container { position: relative; height: 320px; margin: 20px 0; }
@media (max-width: 768px) {
    .navbar { flex-direction: column; height: auto; padding: 12px; }
    .nav-links a { margin: 0 10px; }
    table { font-size: 12px; }
    th, td { padding: 6px; }
}