body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background-color: #f9fafb;
  margin: 0;
  padding: 2rem;
  color: #111827;
}

.roi-calculator {
  background: white;
  border-radius: 1rem;
  padding: 2rem;
  max-width: 600px;
  margin: 0 auto;
  box-shadow: 0 6px 18px rgba(0,0,0,0.06);
}

.roi-calculator h1 {
  font-size: 1.75rem;
  margin-bottom: 1.5rem;
  text-align: center;
}

.input-group {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  margin-bottom: 2rem;
}

.input-block {
  display: flex;
  flex-direction: column;
}

.disclaimer {
  font-size: 0.75rem;
  color: #6b7280; /* Tailwind's gray-500 */
  margin-top: 0.5rem;
  line-height: 1.3;
  max-width: 600px;
  text-align: center;
  margin-left: auto;
  margin-right: auto;
}

.input-block label {
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.input-block span {
  font-size: 0.875rem;
  color: #6b7280;
}

.input-block input {
  width: 100%;
  padding: 0.5rem;
  font-size: 1rem;
  border-radius: 0.375rem;
  border: 1px solid #d1d5db;
  margin-top: 0.25rem;
  box-sizing: border-box;
}

.results {
  text-align: center;
  margin-top: 2rem;
}


.results p.net-roi {
  font-size: 1.5rem;
  font-weight: 700;
  color: #10b981;
  text-align: center;
  margin-top: 1rem;
}

.sub {
  font-size: 1.4rem;
  font-weight: 500;
  color: #10b981;
}


button {
  background-color: #f3f4f6;
  border: 1px solid #d1d5db;
  padding: 0.5rem 1.25rem;
  border-radius: 0.5rem;
  font-size: 1rem;
  cursor: pointer;
}

button:hover {
  background-color: #e5e7eb;
}