:root {
    --bg: #0b0f19;
    --text: #e2e8f0;
    --card: #141b2d;
    --border: #2a3441;
    --primary: #8b5cf6;
}

body.theme-light {
    --bg: #f8fafc;
    --text: #1e293b;
    --card: #ffffff;
    --border: #e2e8f0;
    --primary: #6366f1;
}

body {
    margin: 0;
    font-family: 'Outfit', sans-serif;
    background-color: var(--bg);
    color: var(--text);
    transition: all 0.3s ease;
}

.stats-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 40px;
    background: var(--card);
    border-bottom: 1px solid var(--border);
}

.stats-nav h2 { margin: 0; }

.controls {
    display: flex;
    gap: 15px;
    align-items: center;
}

select, button, .btn-link {
    background: var(--bg);
    color: var(--text);
    border: 1px solid var(--border);
    padding: 10px 15px;
    border-radius: 8px;
    font-family: 'Outfit', sans-serif;
    font-size: 15px;
    text-decoration: none;
    cursor: pointer;
}

button:hover, .btn-link:hover {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
}

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

.msg-box {
    text-align: center;
    padding: 50px;
    font-size: 20px;
    color: #64748b;
}

.chart-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 30px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.1);
}

.chart-card h3 {
    margin-top: 0;
    color: var(--primary);
}

canvas {
    width: 100% !important;
    max-height: 300px;
}