:root {
  --bg: var(--color-bg);
  --panel: color-mix(in srgb, var(--color-surface) 96%, transparent);
  --panel2: color-mix(in srgb, var(--color-surface) 88%, var(--color-surface-muted));
  --text: var(--color-text);
  --muted: var(--color-text-muted);
  --accent: var(--color-primary);
  --accent-2: var(--color-primary);
  --accent-glow: color-mix(in srgb, var(--color-primary) 26%, transparent);
  --border: color-mix(in srgb, var(--color-border) 70%, transparent);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--text);
  background: var(--bg);
}

a { color: var(--accent-2); text-decoration: none; }
a:hover { text-decoration: underline; }

.engine-intro {
  width: min(1084px, calc(100% - 36px));
  margin: 0 auto;
  padding: 14px 0 0;
}

.engine-intro h1 {
  margin: 0 0 6px;
  font-family: var(--font-heading);
  font-size: 1.25rem;
}

.muted { color: var(--muted); }
.small { font-size: 0.9rem; }

.layout-map {
  display: grid;
  grid-template-columns: minmax(290px, 360px) minmax(420px, 1fr) minmax(340px, 420px);
  gap: 1rem;
  width: min(1084px, calc(100% - 36px));
  margin: 0 auto;
  padding: 1rem 0 1.4rem;
}

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-top: 3px solid var(--color-accent);
  border-radius: 16px;
  padding: 1rem;
  box-shadow: var(--shadow-soft);
}

.card h2 {
  margin: 0 0 0.75rem;
  font-family: var(--font-heading);
  font-size: 1.1rem;
}

.row { margin-bottom: 0.85rem; }

label {
  display: block;
  margin-bottom: 0.35rem;
  font-size: 0.88rem;
  color: var(--muted);
}

input,
select {
  width: 100%;
  border: 1px solid color-mix(in srgb, var(--color-border) 68%, transparent);
  background: var(--color-surface);
  color: var(--text);
  border-radius: 10px;
  padding: 0.6rem 0.7rem;
}

input:focus,
select:focus {
  outline: none;
  border-color: var(--accent-2);
  box-shadow: 0 0 0 2px rgba(159, 213, 109, 0.18);
}

.actions { display: flex; gap: 0.6rem; margin-top: 0.9rem; }
.actions { flex-wrap: wrap; }

.btn {
  border: 1px solid var(--border);
  background: var(--color-surface);
  color: var(--text);
  border-radius: 10px;
  padding: 0.56rem 0.85rem;
  cursor: pointer;
}

.btn.primary {
  background: var(--accent-2);
  color: var(--color-surface);
  font-weight: 600;
  border-color: transparent;
  box-shadow: 0 22px 54px var(--accent-glow);
}

#engineMap {
  height: 540px;
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.12);
}

.cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.7rem;
  margin-top: 0.6rem;
}

.subhead {
  margin: 1rem 0 0.45rem;
  font-size: 0.95rem;
  color: var(--color-text);
}

.table-wrap {
  overflow: auto;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--color-surface);
}

.hub-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.78rem;
}

.hub-table th,
.hub-table td {
  padding: 0.4rem 0.45rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.09);
  text-align: left;
  white-space: nowrap;
}

.hub-table th {
  color: var(--color-text);
  font-weight: 600;
}

.result-card {
  border: 1px solid color-mix(in srgb, var(--color-border) 64%, transparent);
  border-radius: 12px;
  padding: 0.7rem;
  background: var(--color-surface);
}

.result-card h3 { margin: 0 0 0.4rem; font-size: 0.92rem; }
.result-card h3 { font-family: var(--font-heading); }
.result-main { font-size: 1rem; font-weight: 600; margin-bottom: 0.35rem; }

.assumptions {
  margin-top: 0.9rem;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 0.6rem;
  background: var(--color-surface);
}

.assumptions summary {
  cursor: pointer;
  color: var(--color-text);
  font-weight: 600;
}

.assumptions pre {
  white-space: pre-wrap;
  font-size: 0.78rem;
  margin: 0.6rem 0 0;
  color: var(--color-text-muted);
}

.disclaimer {
  margin-top: 0.9rem;
  border-left: 3px solid var(--color-accent);
  background: var(--color-accent-soft);
  padding: 0.55rem 0.65rem;
  font-size: 0.83rem;
  color: var(--color-text);
}

@media (max-width: 1250px) {
  .layout-map {
    grid-template-columns: 1fr;
  }

  #engineMap {
    height: 460px;
  }
}

@media (max-width: 768px) {
  .engine-intro { padding-top: 12px; }
}