:root {
  --green: #2e7d32; --red: #c62828; --blue: #1565c0;
  --orange: #ef6c00; --teal: #00796b; --grey: #616161; --purple: #6a1b9a;
  --bg: #f5f7fa; --panel: #fff; --border: #cfd8dc; --text: #263238; --muted: #455a64;
}
* { box-sizing: border-box; }
body { margin: 0; font-family: "Segoe UI", system-ui, sans-serif; background: var(--bg); color: var(--text); }
header { background: var(--panel); border-bottom: 1px solid var(--border); padding: 10px 16px; }
h1 { margin: 0 0 8px; font-size: 1.15rem; }
.metrics { display: flex; flex-wrap: wrap; gap: 12px 24px; margin-bottom: 8px; }
.metric label { font-weight: 600; margin-right: 6px; color: var(--muted); }
.metric span { color: var(--green); font-weight: 600; }
.toolbar { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.toolbar button { padding: 6px 12px; border: 1px solid var(--border); background: #eceff1; border-radius: 4px; cursor: pointer; }
.toolbar button:hover { background: #dfe6eb; }
.toolbar button.primary { background: var(--blue); color: #fff; border-color: var(--blue); }
#status { margin-left: auto; color: var(--muted); font-size: 0.9rem; }
main { display: grid; grid-template-columns: 2fr 3fr; gap: 8px; padding: 8px; min-height: calc(100vh - 120px); }
.panel { background: var(--panel); border: 1px solid var(--border); border-radius: 6px; display: flex; flex-direction: column; min-height: 0; }
.tab-bar { display: flex; flex-wrap: wrap; border-bottom: 1px solid var(--border); background: #eceff1; }
.tab-bar button { border: none; background: transparent; padding: 8px 12px; cursor: pointer; font-size: 0.85rem; }
.tab-bar button.active { background: var(--panel); font-weight: 600; border-bottom: 2px solid var(--blue); }
.tab-panel { display: none; padding: 10px; overflow: auto; flex: 1; }
.tab-panel.active { display: block; }
fieldset { border: 1px solid var(--border); border-radius: 4px; margin: 0 0 10px; padding: 8px 10px; }
legend { font-weight: 600; font-size: 0.9rem; }
.field { display: grid; grid-template-columns: 1fr 120px; gap: 8px; align-items: center; margin: 4px 0; }
.field label { font-size: 0.85rem; }
.field input[type="number"], .field input[type="text"] { width: 100%; padding: 4px 6px; }
.hint { font-size: 0.8rem; color: var(--muted); margin: 6px 0; }
pre.summary { font-family: Consolas, monospace; font-size: 0.8rem; white-space: pre-wrap; background: #fafafa; padding: 8px; border: 1px solid var(--border); border-radius: 4px; max-height: 70vh; overflow: auto; }
.chart-grid { display: grid; gap: 10px; }
.chart-grid img { max-width: 100%; border: 1px solid var(--border); border-radius: 4px; background: #fff; }
.chart-layout { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(220px, 0.85fr); gap: 14px; align-items: start; }
.chart-layout img { width: 100%; max-width: 100%; border: 1px solid var(--border); border-radius: 4px; background: #fff; }
.chart-caption { font-size: 0.82rem; line-height: 1.45; color: var(--text); background: #eceff1; border: 1px solid var(--border); border-radius: 6px; padding: 12px 14px; white-space: pre-wrap; max-height: 520px; overflow-y: auto; }
.chart-subtabs { display: flex; gap: 4px; flex-wrap: wrap; margin-bottom: 8px; }
.chart-subtabs button { padding: 4px 10px; font-size: 0.8rem; border: 1px solid var(--border); background: #fff; border-radius: 4px; cursor: pointer; }
.chart-subtabs button.active { background: var(--teal); color: #fff; border-color: var(--teal); }
.glossary { font-size: 0.9rem; line-height: 1.45; white-space: pre-wrap; max-height: 70vh; overflow: auto; }
@media (max-width: 1100px) { main { grid-template-columns: 1fr; } }

#app-error:not([hidden]) {
  background: #ffebee;
  color: #b71c1c;
  padding: 10px 16px;
  border-bottom: 2px solid #c62828;
  font-size: 0.9rem;
  white-space: pre-wrap;
}
.panel { min-height: 420px; }
#input-panels, #output-panels { min-height: 360px; }