body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
  background: linear-gradient(180deg, #f6f8fb, #eef2f7);
  margin: 0;
  padding: 0;
  color: #1f2933;
}

.container {
  max-width: 620px;
  margin: 60px auto;
  background: white;
  padding: 36px;
  border-radius: 14px;
  box-shadow: 0 10px 25px rgba(0,0,0,0.08);
}

h1 {
  text-align: center;
  margin-bottom: 10px;
  font-size: 28px;
}

p {
  text-align: center;
  color: #6b7280;
  margin-bottom: 25px;
}

.calculator {
  display: flex;
  flex-direction: column;
}

label {
  margin-top: 14px;
  font-weight: 600;
  font-size: 14px;
}

input {
  padding: 12px;
  margin-top: 6px;
  border-radius: 8px;
  border: 1px solid #d1d5db;
  font-size: 15px;
}

input:focus {
  outline: none;
  border-color: #2563eb;
  box-shadow: 0 0 0 3px rgba(37,99,235,0.15);
}

button {
  margin-top: 26px;
  padding: 14px;
  background: #2563eb;
  color: white;
  border: none;
  border-radius: 10px;
  cursor: pointer;
  font-size: 16px;
  font-weight: 600;
  transition: background 0.2s ease, transform 0.1s ease;
}

button:hover {
  background: #1e4fd6;
  transform: translateY(-1px);
}

button:active {
  transform: translateY(0);
}

.results {
  margin-top: 24px;
  padding: 18px;
  background: #eef3ff;
  border-radius: 10px;
  font-size: 16px;
  line-height: 1.5;
}

@media (max-width: 600px) {
  .container {
    margin: 20px;
    padding: 24px;
  }
}

.content {
  margin-top: 28px;
  padding-top: 10px;
  border-top: 1px solid #e5e7eb;
}

.content h2 {
  margin-top: 22px;
  font-size: 18px;
}

.content h3 {
  margin-top: 14px;
  font-size: 15px;
}

.content p {
  text-align: left;
  margin: 10px 0;
  color: #374151;
  line-height: 1.6;
}

.footer {
  margin-top: 30px;
  padding-top: 18px;
  border-top: 1px solid #e5e7eb;
  text-align: center;
  font-size: 14px;
  color: #6b7280;
}

.footer a {
  color: #2563eb;
  text-decoration: none;
}

.footer a:hover {
  text-decoration: underline;
}

.disclaimer {
  margin-top: 10px;
  font-size: 12px;
  color: #9ca3af;
}