.kpi-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-bottom:24px}
.kpi-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:18px 20px;position:relative;overflow:hidden;transition:transform var(--transition),box-shadow var(--transition);min-height:140px}
.kpi-card:hover{transform:translateY(-2px);box-shadow:var(--shadow)}
.kpi-card::before{content:'';position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,var(--accent),var(--purple))}
.kpi-label{font-size:11px;color:var(--text-muted);font-weight:600;text-transform:uppercase;letter-spacing:0.05em;margin-bottom:8px}
.kpi-value{font-size:26px;font-weight:700;color:var(--text-primary);margin-bottom:4px}
.kpi-sub{font-size:12px;color:var(--text-secondary)}
.kpi-icon{position:absolute;top:18px;right:18px;width:36px;height:36px;border-radius:8px;display:flex;align-items:center;justify-content:center;font-size:16px;background:var(--accent-glow);color:var(--accent-light)}
.charts-grid{display:grid;grid-template-columns:repeat(2,minmax(320px,1fr));gap:16px;margin-top:16px}
.chart-wrap{min-height:320px;position:relative;display:flex;align-items:center;justify-content:center}
.chart-wrap canvas{width:100%;height:100%}
.chart-empty-state{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);color:var(--text-secondary);background:rgba(0,0,0,0.15);padding:16px 20px;border-radius:14px;font-size:13px;font-weight:600;max-width:80%;text-align:center;pointer-events:none}
@media(max-width:900px){.charts-grid{grid-template-columns:1fr}}
/* KPI grid: 4 per row on desktop, gracefully stepping down on smaller widths */
@media(max-width:1200px){.kpi-grid{grid-template-columns:repeat(3,1fr)}}
@media(max-width:820px){.kpi-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:520px){.kpi-grid{grid-template-columns:1fr}}