.pai-engine {
  --pai-ink: #0f172a;
  --pai-muted: #64748b;
  --pai-line: #e2e8f0;
  --pai-bg: #f8fafc;
  --pai-card: #ffffff;
  --pai-primary: #4f46e5;
  --pai-primary-2: #6366f1;
  --pai-good: #059669;
  --pai-good-bg: #ecfdf5;
  --pai-radius: 16px;
  font-family: Inter, system-ui, -apple-system, Segoe UI, sans-serif;
  color: var(--pai-ink);
  max-width: 880px;
  margin: 0 auto;
  line-height: 1.5;
}
.pai-engine * { box-sizing: border-box; }
.pai-progress {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  max-width: 420px;
  margin: 0 auto 8px;
}
.pai-step-dot {
  width: 40px; height: 40px; border-radius: 999px;
  background: #e2e8f0; color: #64748b;
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 14px; flex-shrink: 0;
}
.pai-step-dot.is-active {
  background: linear-gradient(135deg, #4f46e5, #6366f1);
  color: #fff;
}
.pai-step-dot.is-done { background: #4f46e5; color: #fff; }
.pai-step-line { flex: 1; height: 4px; background: #e2e8f0; border-radius: 4px; overflow: hidden; }
.pai-step-line span { display: block; height: 100%; width: 0; background: #4f46e5; transition: width .4s ease; }
.pai-progress-labels {
  display: flex; justify-content: space-between; max-width: 420px; margin: 0 auto 24px;
  font-size: 12px; color: var(--pai-muted); font-weight: 600;
}
.pai-panel {
  background: var(--pai-card);
  border: 1px solid var(--pai-line);
  border-radius: var(--pai-radius);
  padding: 28px 24px;
  box-shadow: 0 8px 30px rgba(15, 23, 42, 0.04);
}
.pai-panel h2 { margin: 0 0 4px; font-size: 22px; }
.pai-muted { color: var(--pai-muted); margin: 0 0 20px; font-size: 14px; }
.pai-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.pai-grid-3 { grid-template-columns: 1fr 1fr 1fr; }
.pai-engine label { display: flex; flex-direction: column; gap: 6px; font-size: 13px; font-weight: 600; color: #334155; }
.pai-input { position: relative; display: block; }
.pai-sym { position: absolute; left: 12px; top: 50%; transform: translateY(-50%); color: #94a3b8; font-style: normal; font-weight: 500; }
.pai-engine input[type="number"] {
  width: 100%; padding: 12px 12px 12px 28px;
  border: 1px solid var(--pai-line); border-radius: 12px;
  font-size: 15px; font-weight: 600; color: var(--pai-ink);
}
.pai-engine input[type="number"]:focus {
  outline: none; border-color: var(--pai-primary);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.15);
}
.pai-live {
  margin-top: 20px; padding: 16px; background: var(--pai-bg);
  border-radius: 12px; display: flex; justify-content: space-between; gap: 16px;
}
.pai-live small { display: block; color: var(--pai-muted); font-size: 12px; }
.pai-live strong { font-size: 22px; }
.pai-actions { display: flex; justify-content: space-between; gap: 12px; margin-top: 24px; flex-wrap: wrap; }
.pai-end { justify-content: flex-end; }
.pai-btn {
  appearance: none; border: 1px solid var(--pai-line); background: #fff;
  color: #334155; font-weight: 600; font-size: 14px;
  padding: 12px 18px; border-radius: 12px; cursor: pointer;
  min-height: 44px;
}
.pai-btn:hover { background: #f8fafc; }
.pai-btn-primary {
  background: var(--pai-primary); border-color: var(--pai-primary); color: #fff;
}
.pai-btn-primary:hover { background: #4338ca; }
.pai-btn-dark { background: #0f172a; border-color: #0f172a; color: #fff; }
.pai-label { font-size: 13px; font-weight: 600; margin: 0 0 10px; }
.pai-chips { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin-bottom: 20px; }
@media (min-width: 640px) { .pai-chips { grid-template-columns: 1fr 1fr 1fr 1fr; } }
.pai-chips label {
  flex-direction: row; align-items: center; gap: 8px;
  border: 1px solid var(--pai-line); border-radius: 12px; padding: 10px 12px;
  font-size: 13px; cursor: pointer; background: #fff;
}
.pai-chips label:has(input:checked) {
  border-color: var(--pai-primary); background: #eef2ff;
}
.pai-wow {
  background: linear-gradient(135deg, #ecfdf5, #f0fdfa);
  border: 1px solid #a7f3d0; border-radius: 16px;
  padding: 28px 20px; text-align: center; margin-bottom: 20px;
}
.pai-wow-kicker { color: #047857; font-weight: 600; font-size: 13px; margin: 0 0 8px; }
.pai-wow-line { display: flex; align-items: center; justify-content: center; gap: 12px; flex-wrap: wrap; margin: 0 0 8px; }
.pai-wow-line #pai-before { font-size: 24px; font-weight: 700; color: #64748b; }
.pai-wow-line #pai-after { font-size: 32px; font-weight: 800; color: var(--pai-good); }
.pai-wow-delta { font-size: 18px; font-weight: 700; color: #047857; margin: 0; }
.pai-wow-meta { font-size: 14px; color: #059669; margin: 6px 0 0; }
.pai-disclaimer { font-size: 12px; color: var(--pai-muted); max-width: 520px; margin: 16px auto 0; font-weight: 400; }
.pai-metrics { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-bottom: 20px; }
@media (min-width: 720px) { .pai-metrics { grid-template-columns: 1fr 1fr 1fr; } }
.pai-metric { background: var(--pai-bg); border: 1px solid var(--pai-line); border-radius: 12px; padding: 14px; }
.pai-metric small { display: block; font-size: 11px; color: var(--pai-muted); }
.pai-metric strong { font-size: 16px; }
.pai-metric.is-good strong { color: var(--pai-good); }
.pai-table-wrap { overflow-x: auto; margin-bottom: 20px; }
.pai-table { width: 100%; border-collapse: collapse; font-size: 14px; }
.pai-table th, .pai-table td { padding: 12px 8px; text-align: right; border-bottom: 1px solid var(--pai-line); }
.pai-table th:first-child, .pai-table td:first-child { text-align: left; }
.pai-table .pai-total { background: var(--pai-bg); font-weight: 700; }
.pai-chart-wrap { background: var(--pai-bg); border: 1px solid var(--pai-line); border-radius: 12px; padding: 16px; margin-bottom: 8px; }
.pai-chart-wrap h3 { margin: 0 0 12px; font-size: 14px; }
@media (max-width: 700px) {
  .pai-grid, .pai-grid-3 { grid-template-columns: 1fr; }
  .pai-panel { padding: 20px 16px; }
}
@media print {
  .pai-actions, .pai-progress, .pai-progress-labels { display: none !important; }
}