/* Chargeback dashboard — extends styles.css with the layout pieces specific
   to the per-tenant cost view. Same dark palette as the operator page. */

.topnav {
  display: flex;
  gap: 16px;
  margin-left: auto;
  margin-right: 24px;
  font-size: 14px;
}
.topnav a {
  color: var(--text-muted);
  text-decoration: none;
  padding: 6px 10px;
  border-radius: 6px;
  border: 1px solid transparent;
}
.topnav a:hover { color: var(--text); border-color: var(--border); }
.topnav a.active {
  color: var(--aws-orange);
  border-color: var(--aws-orange);
}

.config-panel .full { grid-column: 1 / -1; }

.chargeback-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
  padding: 18px 24px 36px;
  max-width: 1400px;
  margin: 0 auto;
}

.kpi-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}
.kpi {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 14px 16px;
}
.kpi .label { font-size: 12px; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.5px; }
.kpi .value { font-size: 28px; font-weight: 600; margin-top: 6px; }
.kpi .delta { font-size: 12px; margin-top: 4px; color: var(--aws-green); }
.kpi.warn .value { color: var(--aws-orange); }
.kpi.error .value { color: var(--aws-red); }

.charts-row {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 14px;
}
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
}
.card h2 { margin: 0 0 10px 0; font-size: 16px; font-weight: 600; }
.card h3 { margin: 0 0 8px 0; font-size: 13px; font-weight: 600; color: var(--text-muted); text-transform: uppercase; }

.bar-chart svg { width: 100%; height: 240px; display: block; }
.donut svg { width: 100%; height: 240px; display: block; }
.legend { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 8px; font-size: 12px; }
.legend .swatch { display: inline-block; width: 10px; height: 10px; border-radius: 2px; margin-right: 4px; vertical-align: middle; }

table.cb-table { width: 100%; border-collapse: collapse; font-size: 13px; }
table.cb-table th, table.cb-table td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--border); }
table.cb-table th { color: var(--text-muted); text-transform: uppercase; font-size: 11px; letter-spacing: 0.5px; font-weight: 500; }
table.cb-table td.num, table.cb-table th.num { text-align: right; font-family: var(--mono); }
table.cb-table tbody tr:hover { background: var(--surface-2); }

.empty-state {
  background: var(--surface);
  border: 1px dashed var(--border);
  border-radius: 8px;
  padding: 36px;
  text-align: center;
  color: var(--text-muted);
}
.error-state {
  background: rgba(209, 50, 18, 0.08);
  border: 1px solid var(--aws-red);
  border-radius: 8px;
  padding: 18px;
  color: var(--aws-red);
  font-family: var(--mono);
  font-size: 13px;
}

.footer {
  padding: 18px 24px;
  border-top: 1px solid var(--border);
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 24px;
}

@media (max-width: 900px) {
  .kpi-row { grid-template-columns: repeat(2, 1fr); }
  .charts-row { grid-template-columns: 1fr; }
}