/* ===== ベース ===== */

body {
  margin: 0;
  background: #f5f5f5;
  font-family: "Noto Sans JP", sans-serif;
  color: #222;
  line-height: 1.8;
}

.container {
  max-width: 860px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ===== ヘッダー ===== */

.site-header {
  background: #fff;
  border-bottom: 1px solid #eee;
}

.header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 0;
}

.header-inner a {
  text-decoration: none;
  color: #333;
  font-weight: 600;
}

/* ===== メイン説明エリア（左寄せ） ===== */

.main {
  padding: 80px 0;
}

.page-title {
  font-size: 30px;
  margin-bottom: 40px;
}

.lead {
  margin-bottom: 40px;
}

/* ===== チェッカーセクション（中央寄せ） ===== */

.checker-section {
  margin-top: 80px;
}

.checker-box {
  max-width: 720px;
  margin: 0 auto;
  background: #ffffff;
  padding: 60px 40px;
  border-radius: 20px;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.05);
  text-align: center;
}

.checker-title {
  margin-top: 0;
  margin-bottom: 20px;
}

.checker-intro {
  margin-bottom: 40px;
}

/* ===== フォーム ===== */

.form-area {
  max-width: 520px;
  margin: 0 auto;
}

.form-row {
  display: flex;
  justify-content: center;
  gap: 14px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

input,
select {
  padding: 10px 14px;
  border: 1px solid #ddd;
  border-radius: 10px;
  font-size: 14px;
}

.btn-check {
  margin: 30px auto 0;
  display: block;
  padding: 14px 30px;
  background: #E8D1C5;
  border: none;
  border-radius: 12px;
  font-weight: bold;
  cursor: pointer;
}

/* ===== 結果エリア ===== */

.result {
  margin-top: 40px;
  padding: 20px;
  border-radius: 16px;
}

.result:not(:empty) {
  background: #f0f0f0;
}

/* ===== フッター ===== */

.site-footer {
  text-align: center;
  padding: 60px 20px;
  background: #fafafa;
  margin-top: 120px;
  font-size: 14px;
}