/* Zero-CDN BESS Electro-Thermal, EKF, SOP & Degradation Workbench */
:root {
  --bg: #0b1020; --panel: #121a2f; --panel-alt: #17223d; --border: #26355c;
  --text: #e8eefc; --muted: #9fb0d6; --accent: #4ea8ff; --accent-2: #2dd4bf;
}
* { box-sizing: border-box; }
body {
  margin: 0; font-family: system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  background: radial-gradient(circle at 15% 0%, #152142 0%, var(--bg) 55%);
  color: var(--text); line-height: 1.5;
}
.container { max-width: 1380px; margin: 0 auto; padding: 24px 20px 56px; }
header.hero {
  display: flex; flex-wrap: wrap; justify-content: space-between; align-items: flex-start;
  gap: 16px; padding-bottom: 20px; border-bottom: 1px solid var(--border); margin-bottom: 22px;
}
.hero h1 { margin: 0 0 6px; font-size: 1.62rem; letter-spacing: -0.02em; }
.hero p { margin: 0; color: var(--muted); max-width: 840px; font-size: 0.94rem; }
.badge-row { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 10px; }
.badge {
  font-size: 0.76rem; font-weight: 600; padding: 4px 10px; border-radius: 999px;
  background: var(--panel-alt); border: 1px solid var(--border); color: var(--accent-2);
}
.btn-row { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
button, a.btn-link {
  cursor: pointer; font-size: 0.84rem; font-weight: 600; padding: 8px 14px;
  border-radius: 8px; border: 1px solid var(--border); background: var(--panel-alt);
  color: var(--text); text-decoration: none;
}
button:hover, a.btn-link:hover { border-color: var(--accent); background: #1d2c50; }
button.primary { background: #1d4ed8; border-color: #3b82f6; }
.controls-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(195px, 1fr));
  gap: 14px; background: var(--panel); border: 1px solid var(--border);
  border-radius: 12px; padding: 16px; margin-bottom: 18px;
}
.control-item label {
  display: flex; justify-content: space-between; font-size: 0.82rem;
  color: var(--muted); margin-bottom: 6px; font-weight: 600;
}
.control-item label span.val { color: var(--accent); font-variant-numeric: tabular-nums; }
.control-item select, .control-item input[type="range"] { width: 100%; }
.control-item select {
  background: var(--bg); color: var(--text); border: 1px solid var(--border);
  border-radius: 6px; padding: 7px 9px; font-size: 0.86rem;
}
.kpi-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(195px, 1fr));
  gap: 12px; margin-bottom: 20px;
}
.kpi-card {
  background: var(--panel); border: 1px solid var(--border); border-radius: 10px; padding: 12px 14px;
}
.kpi-card .kpi-label { font-size: 0.75rem; color: var(--muted); text-transform: uppercase; letter-spacing: 0.04em; }
.kpi-card .kpi-value { font-size: 1.24rem; font-weight: 700; margin-top: 4px; font-variant-numeric: tabular-nums; }
.kpi-card .kpi-sub { font-size: 0.78rem; color: var(--muted); margin-top: 3px; }
.charts-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; margin-bottom: 26px; }
@media (max-width: 960px) { .charts-grid { grid-template-columns: 1fr; } }
.chart-card { background: var(--panel); border: 1px solid var(--border); border-radius: 12px; padding: 14px; }
.chart-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 8px; gap: 8px; }
.chart-header h2 { margin: 0; font-size: 0.94rem; font-weight: 600; }
.chart-header .legend-inline { font-size: 0.76rem; color: var(--muted); }
canvas.plot-canvas {
  width: 100%; height: 268px; display: block; border-radius: 8px; background: #090e1c; border: 1px solid #1c2848;
}
.sop-table-wrap {
  background: var(--panel); border: 1px solid var(--border); border-radius: 12px;
  padding: 16px; margin-bottom: 28px; overflow-x: auto;
}
.sop-table-wrap h2 { margin: 0 0 10px; font-size: 1.02rem; }
table.data-table { width: 100%; border-collapse: collapse; font-size: 0.86rem; font-variant-numeric: tabular-nums; }
table.data-table th, table.data-table td {
  text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--border);
}
table.data-table th { color: var(--muted); font-weight: 600; }
.pill {
  display: inline-block; padding: 2px 8px; border-radius: 999px; font-size: 0.75rem;
  background: var(--panel-alt); border: 1px solid var(--border);
}
.gallery-section h2 { font-size: 1.18rem; margin: 0 0 6px; }
.gallery-section p.lead { color: var(--muted); margin: 0 0 16px; font-size: 0.9rem; }
.gallery-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(420px, 1fr)); gap: 16px; }
@media (max-width: 560px) { .gallery-grid { grid-template-columns: 1fr; } }
.gallery-card { background: var(--panel); border: 1px solid var(--border); border-radius: 12px; padding: 14px; }
.gallery-card h3 { margin: 0 0 8px; font-size: 0.94rem; }
.gallery-card img { width: 100%; height: auto; border-radius: 8px; background: #fff; display: block; }
.gallery-card p { margin: 8px 0 0; font-size: 0.82rem; color: var(--muted); }
footer {
  margin-top: 34px; padding-top: 16px; border-top: 1px solid var(--border);
  font-size: 0.82rem; color: var(--muted); display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px;
}