/* ================= リセット ================= */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

/* ================= ベース ================= */
body {
  font-family: 'Yu Gothic', '游ゴシック', sans-serif;
  background-color: #f5f7fa;
  color: #1a202c;
  font-size: 13px;
  line-height: 1.6;
}

a {
  color: #1a73e8;
  text-decoration: none;
}

/* ================= レイアウト ================= */
.outer-wrapper {
  width: 100%;
  background-color: #f5f7fa;
}

.container {
  max-width: 600px;
  margin: 20px auto;
  background-color: #ffffff;
}

/* ================= ヘッダー ================= */
.header {
  background-color: #BFEFFF;
  padding: 20px 25px;
}

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

.header-title {
  font-size: 16px;
  font-weight: bold;
}

.header-subtitle {
  font-size: 12px;
  margin-bottom: 4px;
}

.header-logo {
  width: 150px;
  height: auto;
}

/* ================= セクション ================= */
.section {
  padding: 25px;
}

/* ================= コンテンツ ================= */
.date-tag {
  font-size: 12px;
  color: #888;
  margin-bottom: 8px;
}

.content-title {
  font-size: 18px;
  font-weight: bold;
  margin: 10px 0 15px;
  color: #333;
}

.content-text {
  font-size: 13px;
  margin-bottom: 15px;
  color: #333;
}

/* ================= PDFボタン ================= */
.pdf-section {
  text-align: center;
  padding: 30px 0 40px;
}

.pdf-button-wrapper {
  display: inline-block;
  background-color: #c44536;
  border-radius: 5px;
  padding: 12px 25px;
}

.pdf-button {
  font-size: 13px;
  font-weight: bold;
  color: #ffffff;
  line-height: 1.2;
}

/* ================= フッター ================= */
.footer {
  background-color: #222831;
  padding: 30px 25px;
  color: #ffffff;
  font-size: 12px;
}

.footer-company {
  font-weight: bold;
  margin-bottom: 8px;
}

.footer-contact {
  margin-bottom: 20px;
}

.footer-contact a,
.footer-unsubscribe a {
  color: #a0aec0;
}

.footer-unsubscribe {
  border-top: 1px solid #444;
  padding-top: 15px;
  font-size: 11px;
  color: #cbd5e0;
}
.red { color: #c44536; }

/* ================= モバイル ================= */
@media screen and (max-width: 768px) {
  body {
    font-size: 9px;
  }

.section-title { font-size: 11.2px; /* 16px × 0.7 */ margin-bottom: 8.4px; /* 12px × 0.7 */ }

  .container {
    margin: 14px auto;
  }

  .header {
    padding: 14px 18px;
  }

  .header-title {
    font-size: 11px;
  }

  .header-logo {
    width: 105px;
  }

  .section {
    padding: 18px;
  }

  .content-title {
    font-size: 13px;
  }

  .pdf-section {
    padding: 21px 0 28px;
  }

  .pdf-button-wrapper {
    padding: 8px 18px;
  }

  .pdf-button {
    font-size: 9px;
  }

  .footer {
    padding: 21px 18px;
    font-size: 8px;
  }
}

/* ==========================
   タイトル帯（共通）
========================== */
.title-band {
  background: #f2f2f2;
  border-left: 6px solid #c7002a;
  padding: 10px 14px;
  margin: 30px 0 15px;
  font-weight: bold;
  font-size: 15px;
  color: #000;
  line-height: 1.4;
}