:root {
  --green: #22c55e;
  --amber: #eab308;
  --orange: #f97316;
  --red: #ef4444;
  --bg: #0f172a;
  --card: #1e293b;
  --text: #f1f5f9;
  --muted: #94a3b8;
  --border: #334155;
}

* { box-sizing: border-box; }
body {
  font-family: 'DM Sans', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  margin: 0;
  padding: 1rem;
  line-height: 1.5;
}
h1, h2, h3 { margin-top: 0; font-weight: 600; }
h1 { font-size: 1.75rem; }
h2 { font-size: 1.25rem; color: var(--muted); }

.layout {
  max-width: 1600px;
  margin: 0 auto;
}

/* Executive summary card */
.exec-card {
  background: linear-gradient(135deg, var(--card) 0%, #0f172a 100%);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.25rem 1.5rem;
  margin-bottom: 1.5rem;
}
.exec-card h2 { margin-bottom: 0.75rem; }
.exec-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 1rem;
}
.exec-item { font-size: 0.9rem; }
.exec-item strong { color: var(--amber); }

/* Filters */
.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: center;
  margin-bottom: 1.5rem;
  padding: 1rem;
  background: var(--card);
  border-radius: 10px;
  border: 1px solid var(--border);
}
.filters label { font-size: 0.85rem; color: var(--muted); margin-right: 0.25rem; }
.filters select, .filters input {
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.4rem 0.6rem;
  font-size: 0.9rem;
}
.filters select { min-width: 140px; }
.btn {
  background: var(--orange);
  color: #fff;
  border: none;
  padding: 0.5rem 1rem;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.9rem;
}
.btn:hover { filter: brightness(1.1); }
.btn.secondary { background: var(--border); }

/* KPI cards */
.kpi-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 1rem;
  margin-bottom: 1.5rem;
}
.kpi-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1rem;
  text-align: center;
}
.kpi-card .value { font-size: 1.75rem; font-weight: 700; }
.kpi-card .value.low { color: var(--green); }
.kpi-card .value.med { color: var(--amber); }
.kpi-card .value.high { color: var(--orange); }
.kpi-card .value.critical { color: var(--red); }
.kpi-card .value.dim { font-size: 0.85rem; font-weight: 500; word-break: break-word; }
.kpi-card .label { font-size: 0.8rem; color: var(--muted); margin-top: 0.25rem; }

/* Charts grid */
.charts-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
  margin-bottom: 1.5rem;
}
@media (max-width: 900px) { .charts-grid { grid-template-columns: 1fr; } }
.chart-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1rem;
  overflow: hidden;
}
.chart-card.full { grid-column: 1 / -1; }
.chart-card h3 { font-size: 1rem; margin-bottom: 0.75rem; }

/* Table */
.table-wrap {
  overflow-x: auto;
  margin-bottom: 1.5rem;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--card);
}
table { width: 100%; border-collapse: collapse; }
th, td { padding: 0.6rem 0.8rem; text-align: left; border-bottom: 1px solid var(--border); }
th { background: var(--bg); color: var(--muted); font-size: 0.8rem; font-weight: 600; cursor: pointer; }
th:hover { color: var(--text); }
tr:hover { background: rgba(255,255,255,0.03); }
.risk-low { color: var(--green); }
.risk-med { color: var(--amber); }
.risk-high { color: var(--orange); }
.risk-critical { color: var(--red); }

/* Weights config */
.weights-config {
  display: flex;
  gap: 1rem;
  align-items: center;
  flex-wrap: wrap;
  font-size: 0.85rem;
}
.weights-config input[type="number"] {
  width: 60px;
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 0.3rem;
}

/* Export buttons */
.export-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1rem;
}
.export-bar .btn { font-size: 0.8rem; padding: 0.4rem 0.8rem; }

/* Load data fallback */
.load-fallback {
  padding: 1rem;
  background: rgba(234,179,8,0.15);
  border: 1px solid var(--amber);
  border-radius: 8px;
  margin-bottom: 1rem;
  font-size: 0.9rem;
}
.load-fallback input[type="file"] { margin-right: 0.5rem; }

/* Print */
@media print {
  body { background: #fff; color: #111; }
  .filters, .btn, .export-bar, .load-fallback { display: none !important; }
  .chart-card, .exec-card, .kpi-card { break-inside: avoid; }
}