/* =========================
   基本設定
========================= */

html {
  box-sizing: border-box;
  scroll-behavior: smooth;
}

*,
*::before,
*::after {
  box-sizing: inherit;
}

body {
  margin: 0;
}


/* =========================
   ページ全体
========================= */

.afterword-body {
  min-height: 100vh;

  font-family:
    "BIZ UDPGothic",
    "Yu Gothic",
    "Hiragino Kaku Gothic ProN",
    "Meiryo",
    sans-serif;

  color: #3f342c;

  /* ページ下までオフホワイト */
  background-color: #fffaf2;
}

.afterword-page {
  width: 100%;
  min-height: 100vh;
}


/* =========================
   ご褒美イラスト
========================= */

.reward-visual {
  width: 100%;
  padding: 40px 20px;

  background-color: #fffaf2;
}

.reward-image {
  display: block;

  width: min(100%, 1000px);
  height: auto;

  margin: 0 auto;

  border-radius: 12px;

  box-shadow:
    0 10px 28px rgba(70, 52, 38, 0.14);
}

/* =========================
   あとがき部分
========================= */

.afterword-section {
  width: 100%;

  padding: 70px 24px 60px;

  background-color: #fffaf2;
}

.afterword-inner {
  width: min(100%, 820px);

  margin: 0 auto;
  padding: 52px 58px;

  background-color: #ffffff;

  border: 1px solid #e8dccf;
  border-radius: 18px;

  box-shadow:
    0 10px 30px rgba(90, 67, 48, 0.08);
}


/* AFTERWORDの小さな英字 */

.afterword-label {
  margin: 0 0 10px;

  text-align: center;

  font-family:
    Georgia,
    "Times New Roman",
    serif;

  font-size: 13px;
  letter-spacing: 0.24em;

  color: #a48868;
}


/* 見出し */

.afterword-title {
  margin: 0 0 42px;

  text-align: center;

  font-family:
    "Yu Mincho",
    "Hiragino Mincho ProN",
    serif;

  font-size: clamp(26px, 4vw, 38px);
  font-weight: normal;

  letter-spacing: 0.12em;

  color: #4a392d;
}


/* あとがき本文 */

.afterword-text {
  font-size: 16px;
  line-height: 2.15;

  letter-spacing: 0.04em;
}

.afterword-text p {
  margin: 0 0 1.8em;
}

.afterword-text p:last-child {
  margin-bottom: 0;
}


/* 署名 */

.afterword-sign {
  margin: 42px 0 0;

  text-align: right;

  font-family:
    "Yu Mincho",
    "Hiragino Mincho ProN",
    serif;

  font-size: 17px;

  letter-spacing: 0.08em;

  color: #594638;
}


/* =========================
   フッター
========================= */

.afterword-footer {
  width: 100%;

  padding: 10px 20px 45px;

  text-align: center;

  background-color: #fffaf2;
}


/* 戻るボタン */

.back-button {
  display: inline-block;

  min-width: 220px;

  padding: 13px 28px;

  text-decoration: none;

  font-size: 14px;
  font-weight: bold;

  letter-spacing: 0.06em;

  color: #6b533c;
  background-color: #ffffff;

  border: 1px solid #c8a979;
  border-radius: 999px;

  box-shadow:
    0 4px 12px rgba(90, 67, 48, 0.08);

  transition:
    transform 0.2s ease,
    background-color 0.2s ease,
    box-shadow 0.2s ease;
}

.back-button:hover {
  transform: translateY(-2px);

  background-color: #fffdf8;

  box-shadow:
    0 7px 16px rgba(90, 67, 48, 0.12);
}


/* 著作権表示 */

.copyright {
  margin: 24px 0 0;

  font-size: 12px;

  letter-spacing: 0.08em;

  color: #927f70;
}


/* =========================
   スマートフォン表示
========================= */

@media screen and (max-width: 768px) {

  .afterword-section {
    padding: 42px 16px 45px;
  }

  .afterword-inner {
    padding: 36px 24px;

    border-radius: 14px;
  }

  .afterword-title {
    margin-bottom: 30px;
  }

  .afterword-text {
    font-size: 15px;
    line-height: 2;
  }

  .afterword-sign {
    margin-top: 32px;

    font-size: 16px;
  }

  .afterword-footer {
    padding-bottom: 35px;
  }

  .back-button {
    width: min(100%, 280px);
  }

}
@media screen and (max-width: 768px) {

  .reward-visual {
    padding: 20px 12px;
  }

  .reward-image {
    width: 100%;
    border-radius: 8px;
  }

}