.site-header {
  display: flex;
  align-items: center;
  min-height: 40px;
  padding: 0.35rem var(--space-4);
  border-bottom: 1px solid var(--color-border);
  background: rgba(247, 250, 247, 0.92);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-text);
  font-size: 0.95rem;
  font-weight: 700;
  text-decoration: none;
}

main {
  width: min(100%, 1120px);
  margin: 0 auto;
  padding: var(--space-3) var(--space-4) var(--space-5);
}

.hero {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2) 0;
}

.hero__content {
  min-width: 0;
}

.hero__content p {
  max-width: 64ch;
  font-size: 0.98rem;
  margin-bottom: 0;
}

.hero__image {
  display: none;
}

.calculator-section {
  padding: var(--space-2) 0 var(--space-6);
}

.section-heading {
  display: flex;
  flex-direction: column;
  align-items: end;
  justify-content: space-between;
  gap: var(--space-4);
  margin-bottom: var(--space-3);
}

.section-heading p {
  max-width: 58ch;
  font-size: 0.95rem;
  margin-bottom: 0;
}

.calculator-grid {
  display: grid;
  gap: var(--space-3);
}

.seo-content {
  padding: var(--space-6) 0;
  border-top: 1px solid var(--color-border);
}

.seo-content p {
  max-width: 72ch;
}

@media (min-width: 720px) {
  main {
    padding: var(--space-3) var(--space-5) var(--space-6);
  }

  .hero {
    padding: var(--space-2) 0 var(--space-3);
  }

  .hero__image {
    display: block;
    width: 112px;
  }

  .calculator-form {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .section-heading {
    flex-direction: row;
  }
}

@media (min-width: 980px) {
  .hero__image {
    width: 132px;
  }

  .calculator-grid {
    grid-template-columns: minmax(0, 1.04fr) minmax(360px, 0.96fr);
    align-items: start;
  }

  .result-panel {
    position: sticky;
    top: var(--space-3);
  }
}