:root {
  --main: #2b7a78;
  --bg: #f7f9f9;
  --warn-bg: #fff3cd;
}

body {
  font-family: "Hiragino Sans", "Yu Gothic", sans-serif;
  background: var(--bg);
  margin: 0;
  padding: 0;
  color: #222;
}

header {
  background: var(--main);
  color: white;
  padding: 24px 16px;
  text-align: center;
}

header h1 {
  margin: 0 0 8px;
  font-size: 1.4rem;
}

.subtitle {
  margin: 0;
  font-size: 0.85rem;
  opacity: 0.9;
}

main {
  max-width: 480px;
  margin: 24px auto;
  padding: 0 16px;
}

form {
  background: white;
  padding: 20px;
  border-radius: 10px;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.1);
  display: flex;
  flex-direction: column;
  gap: 16px;
}

label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 0.9rem;
}

.checkbox-label {
  flex-direction: row;
  align-items: center;
  gap: 8px;
}

select,
input[type="text"] {
  padding: 10px;
  border: 1px solid #ccc;
  border-radius: 6px;
  font-size: 1rem;
}

button {
  background: var(--main);
  color: white;
  border: none;
  padding: 12px;
  border-radius: 6px;
  font-size: 1rem;
  cursor: pointer;
}

button:hover {
  opacity: 0.9;
}

.result {
  margin-top: 20px;
  background: white;
  padding: 20px;
  border-radius: 10px;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.1);
}

.result.hidden {
  display: none;
}

.result h2 {
  margin-top: 0;
  font-size: 1.1rem;
}

.compare-row {
  display: flex;
  justify-content: space-between;
  padding: 10px 0;
  border-bottom: 1px solid #eee;
}

.compare-row:last-child {
  border-bottom: none;
}

.compare-row .amount {
  font-weight: bold;
}

.result .disclaimer {
  margin-top: 12px;
  font-size: 0.75rem;
  color: #777;
}

.result .warn {
  background: var(--warn-bg);
  padding: 10px;
  border-radius: 6px;
  font-size: 0.85rem;
  margin-bottom: 12px;
}

.ad-slot {
  margin-top: 24px;
  padding: 30px;
  text-align: center;
  background: #eee;
  border-radius: 6px;
  color: #999;
  font-size: 0.8rem;
}

footer {
  text-align: center;
  padding: 24px 16px;
  font-size: 0.75rem;
  color: #888;
}

footer a {
  color: var(--main);
}