:root {
  color-scheme: dark;
  --bg: #0f172a;
  --panel: #111827;
  --muted: #94a3b8;
  --text: #e5eefc;
  --accent: #38bdf8;
  --accent-2: #22c55e;
  --border: rgba(148, 163, 184, 0.22);
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, sans-serif;
  background: linear-gradient(180deg, #020617, #0f172a 30%, #111827);
  color: var(--text);
}
.app-shell { max-width: 1280px; margin: 0 auto; padding: 24px; }
.hero, .panel {
  background: rgba(15, 23, 42, 0.88);
  border: 1px solid var(--border);
  border-radius: 18px;
  box-shadow: 0 20px 50px rgba(2, 6, 23, 0.35);
}
.hero {
  display: flex; justify-content: space-between; gap: 16px; align-items: start;
  padding: 24px; margin-bottom: 18px;
}
.eyebrow { text-transform: uppercase; letter-spacing: .12em; color: var(--accent); font-size: 12px; }
.hero h1, .panel h2, .panel h3 { margin-top: 0; }
.hero-copy, .lesson-copy, .assumption-box, .saved-card p, .muted { color: var(--muted); }
.hero-chip {
  padding: 10px 14px; border-radius: 999px; background: rgba(56, 189, 248, 0.16); color: var(--accent);
  white-space: nowrap; font-weight: 600;
}
.grid { display: grid; grid-template-columns: 1.25fr 1fr; gap: 18px; }
.panel { padding: 20px; }
.field-grid {
  display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px;
}
label { display: grid; gap: 6px; font-size: 14px; color: #cbd5e1; }
input, select, button {
  font: inherit; border-radius: 12px; border: 1px solid var(--border);
}
input, select {
  padding: 11px 12px; background: rgba(15, 23, 42, 0.95); color: var(--text);
}
button {
  cursor: pointer; padding: 11px 14px; background: linear-gradient(135deg, #0ea5e9, #2563eb);
  color: white; font-weight: 700;
}
button:hover { filter: brightness(1.06); }
.button-row, .results-head { display: flex; gap: 10px; justify-content: space-between; align-items: center; margin-top: 16px; }
.assumption-box {
  margin-top: 16px; padding: 14px; border-radius: 14px; background: rgba(15, 23, 42, 0.6); border: 1px dashed var(--border);
}
.metrics {
  display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; margin-top: 14px;
}
.metric-card {
  padding: 14px; border-radius: 16px; background: rgba(30, 41, 59, 0.7); border: 1px solid var(--border);
}
.metric-card button {
  all: unset; cursor: pointer; display: block; width: 100%;
}
.metric-label { color: var(--muted); font-size: 13px; }
.metric-value { font-size: 28px; font-weight: 800; margin-top: 8px; }
.metric-sub { color: #bfdbfe; font-size: 12px; margin-top: 8px; }
.proforma-wrap { margin-top: 18px; overflow: auto; }
.table { width: 100%; border-collapse: collapse; }
.table th, .table td { text-align: left; padding: 10px; border-bottom: 1px solid var(--border); }
.prompt-list { display: grid; gap: 10px; margin-top: 14px; }
.prompt-card, .saved-card {
  background: rgba(30, 41, 59, 0.55); border: 1px solid var(--border); border-radius: 14px; padding: 14px;
}
.saved-list { display: grid; gap: 12px; }
.saved-card h3 { margin-bottom: 6px; }
.saved-card button { margin-top: 10px; }
.saved-panel { grid-column: span 2; }
.good { color: #86efac; }
.warn { color: #fbbf24; }
.bad { color: #fca5a5; }
@media (max-width: 980px) {
  .grid { grid-template-columns: 1fr; }
  .saved-panel { grid-column: span 1; }
  .metrics { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 720px) {
  .hero, .button-row, .results-head { flex-direction: column; align-items: stretch; }
  .field-grid, .metrics { grid-template-columns: 1fr; }
  .app-shell { padding: 14px; }
}