/* ==========================================================================
   AI billing automation guide — page-local styles
   Loaded only on /ai-billing-automation/. Uses global design tokens from
   styles.css; no new global rules, so no sitewide cache-bust needed.
   ========================================================================== */

.section-heading .billing-lede {
  max-width: 66ch;
  margin: 14px auto 0;
  color: var(--muted);
}

/* ----- controls (3-up) ----- */
.billing-controls {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 32px;
}
.billing-controls article {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px 22px;
}
.billing-controls h3 {
  margin: 0 0 8px;
  font-size: 1.08rem;
  color: var(--ink);
}
.billing-controls p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 0.95rem;
  line-height: 1.55;
}

/* ----- result callout ----- */
.billing-result {
  background: var(--ink);
  color: #fff;
  border-radius: calc(var(--radius) * 1.5);
  padding: 34px 36px;
  border-left: 4px solid var(--accent);
  box-shadow: var(--shadow);
}
.billing-result-label {
  display: inline-block;
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--north-blue);
  margin-bottom: 10px;
}
.billing-result-headline {
  margin: 0;
  font-size: 1.28rem;
  line-height: 1.45;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.96);
}
.billing-result-headline strong {
  color: #fff;
  font-weight: 800;
}
.billing-result-detail {
  margin: 14px 0 0;
  font-size: 0.97rem;
  line-height: 1.6;
  color: rgba(255, 255, 255, 0.82);
}
.billing-result-detail strong {
  color: #fff;
  font-weight: 700;
}
.billing-result-link {
  display: inline-block;
  margin-top: 18px;
  font-weight: 700;
  font-size: 0.95rem;
  color: #fff;
  text-decoration: none;
  border-bottom: 2px solid var(--accent);
  padding-bottom: 2px;
}
.billing-result-link:hover,
.billing-result-link:focus-visible {
  color: var(--north-blue);
}

/* ----- responsive ----- */
@media (max-width: 860px) {
  .billing-controls {
    grid-template-columns: 1fr;
  }
  .billing-result {
    padding: 26px 22px;
  }
  .billing-result-headline {
    font-size: 1.12rem;
  }
}