:root {
    --bg-color: #f8fafc;
    --card-bg: #ffffff;
    --primary: #1e293b;
    --accent: #3b82f6;
    --text-main: #334155;
    --text-light: #64748b;
    --success: #10b981;
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-main);
    margin: 0;
    line-height: 1.6;
}

.container { max-width: 1100px; margin: 0 auto; padding: 0 20px; }

header {
    background-color: var(--primary);
    color: white;
    padding: 80px 0;
    text-align: center;
}

.badge {
    display: inline-block;
    background: rgba(255,255,255,0.1);
    padding: 5px 15px;
    border-radius: 20px;
    font-size: 0.8rem;
    margin-bottom: 15px;
}

h1 { font-size: 2.5rem; margin: 0; font-weight: 800; }

.card {
    background: var(--card-bg);
    border-radius: 12px;
    box-shadow: 0 4px 6px -1px rgba(0,0,0,0.1);
    padding: 30px;
    margin-bottom: 30px;
}

.stats-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    margin-top: -40px;
}

.stat-card { text-align: center; }
.stat-card.highlight { border: 2px solid var(--accent); }
.stat-card .value { font-size: 3rem; font-weight: 800; color: var(--accent); }

.viz-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid #e2e8f0;
    padding-bottom: 20px;
    margin-bottom: 20px;
}

.tab-btn {
    background: #f1f5f9;
    border: none;
    padding: 10px 18px;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 600;
    color: var(--text-light);
    transition: 0.3s;
}

.tab-btn.active { background: var(--accent); color: white; }

.viz-content { display: none; text-align: center; }
.viz-content.active { display: block; animation: fadeIn 0.5s; }
.viz-content img { max-width: 100%; border-radius: 8px; margin-bottom: 20px; }

.viz-desc { background: #f8fafc; padding: 15px; border-left: 4px solid var(--accent); text-align: left; }

.grid-two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }

@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

footer { text-align: center; padding: 40px; color: var(--text-light); }