body { font-family: sans-serif; padding: 2em; margin: 0; background: #f8f9fa; }

.container {
  max-width: 400px;
  margin: 2em auto;
  padding: 2em 1em;
  background: #fff;
  border-radius: 12px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.07);
}

h2 {
  font-size: 1.3em;
  margin-bottom: 1.5em;
  text-align: center;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.5em;
  margin-bottom: 1.2em;
}

label {
  font-size: 0.97em;
  margin-bottom: 0.2em;
}

input[type="number"] {
  width: 100%;
  padding: 0.6em 0.8em;
  border: 1px solid #ccc;
  border-radius: 6px;
  font-size: 1em;
  box-sizing: border-box;
}

button {
  width: 100%;
  padding: 0.7em 0;
  font-size: 1.1em;
  background: #007bff;
  color: #fff;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  transition: background 0.2s;
  margin-top: 0.5em;
}
button:hover {
  background: #0056b3;
}

#leaseResult {
  margin-top: 1.5em;
  font-size: 1.15em;
  text-align: center;
  color: #222;
}

@media (max-width: 600px) {
  .container {
    max-width: 98vw;
    padding: 1.5em 0.5em;
  }
  h2 {
    font-size: 1.1em;
  }
}