body {
  background: #f3f6fa;
}

.shell {
  max-width: 1040px;
  margin: 0 auto;
  padding: 2rem 1.25rem 5rem;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 3rem;
}

.brand {
  font-weight: 700;
  font-size: 1.2rem;
  letter-spacing: -0.01em;
}

.brand .dot {
  color: #2563eb;
}

.cta-link {
  font-size: 0.95rem;
  color: #2563eb;
  text-decoration: none;
}

.estimator {
  background: #ffffff;
  border-radius: 18px;
  border: 1px solid #dde4ee;
  padding: 2.25rem;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 2.5rem;
  box-shadow: 0 12px 40px -28px rgba(20, 40, 80, 0.4);
}

@media (max-width: 760px) {
  .estimator {
    grid-template-columns: 1fr;
    gap: 1.75rem;
    padding: 1.5rem;
  }
}

.estimator h1 {
  margin: 0 0 0.5rem;
  font-size: clamp(1.6rem, 2.6vw, 2rem);
  letter-spacing: -0.01em;
}

.estimator .lede {
  color: #4d5d6b;
  margin: 0 0 1.5rem;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  margin-bottom: 1rem;
}

.field label {
  font-size: 0.85rem;
  font-weight: 600;
  color: #41515f;
}

.field input,
.field select {
  font: inherit;
  padding: 0.65rem 0.85rem;
  border: 1px solid #c8d3e0;
  border-radius: 10px;
  background: #fff;
}

.row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.btn {
  display: inline-block;
  margin-top: 0.5rem;
  padding: 0.85rem 1.4rem;
  background: #2563eb;
  color: white;
  border: none;
  border-radius: 10px;
  font-weight: 600;
  cursor: pointer;
}

.result {
  background: #f4f8fd;
  border: 1px solid #d8e3f3;
  border-radius: 14px;
  padding: 1.5rem;
}

.result .label {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: #2563eb;
  margin: 0 0 0.5rem;
}

.range {
  font-size: 2.2rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 0 0 0.5rem;
}

.range .sub {
  font-size: 1rem;
  font-weight: 500;
  color: #4d5d6b;
}

.bar {
  height: 8px;
  border-radius: 5px;
  background: linear-gradient(
    to right,
    #c2d4f3 0%,
    #2563eb 30%,
    #2563eb 70%,
    #c2d4f3 100%
  );
  margin-bottom: 1.25rem;
}

.note {
  font-size: 0.85rem;
  color: #5a6b7a;
  margin: 0;
}

.note strong {
  color: #1a1a1a;
}

.assumptions {
  margin-top: 1.25rem;
  padding-top: 1.25rem;
  border-top: 1px dashed #d8e3f3;
}

.assumptions h4 {
  margin: 0 0 0.5rem;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: #5a6b7a;
}

.assumptions ul {
  margin: 0;
  padding-left: 1.1rem;
  font-size: 0.9rem;
  color: #4d5d6b;
}

.back {
  margin-top: 3rem;
  font-size: 0.95rem;
}

.back a {
  color: #2563eb;
}