html, body {
  margin: 0;
  padding: 0;
  background: #f5f2eb;
  color: #282622;
}

body {
  font-family:
    "Yu Mincho",
    "Hiragino Mincho ProN",
    "Hiragino Mincho Pro",
    "Noto Serif JP",
    serif;
}

a,
a:visited {
  color: #282622;
}


/* =========================
   PAGE
========================= */

.attention-page {
  box-sizing: border-box;
  width: min(88%, 720px);
  margin: 7vh auto;
  padding: 4em 3.8em 3.5em;
  border: 1px solid rgba(40, 38, 34, 0.36);
}


/* =========================
   HEADER
========================= */

.attention-header {
  text-align: left;
}

.attention-header h1 {
  margin: 0;
  font-size: 1.6rem;
  font-weight: 400;
  letter-spacing: 0.22em;
}

.attention-subtitle {
  margin-top: 0.7em;
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  color: rgba(40, 38, 34, 0.5);
}


/* =========================
   GRADATIM COLOR LINE
========================= */

.attention-rule {
  width: 100%;
  height: 1px;
  margin: 2em 0 2.8em;

  background: linear-gradient(
    to right,
    rgba(102, 119, 132, 0.72) 0%,
    rgba(102, 119, 132, 0.42) 35%,
    rgba(217, 107, 43, 0.42) 68%,
    rgba(217, 107, 43, 0.68) 100%
  );
}


/* =========================
   BODY
========================= */

.attention-body {
  letter-spacing: 0.045em;
}


/* 作者コメント */

.attention-intro {
  font-size: 0.84rem;
  line-height: 2.2;
}

.attention-intro p {
  margin: 0;
}


/* 資料部分 */

.attention-data {
  margin-top: 3.2em;
  padding-top: 2.5em;

  border-top: 1px solid rgba(40, 38, 34, 0.18);

  font-size: 0.84rem;
  line-height: 2.1;
  color: rgba(40, 38, 34, 0.78);
}

.attention-data p {
  margin: 0 0 2.2em;
}

.attention-data p:last-child {
  margin-bottom: 0;
}


/* =========================
   BACK
========================= */

.attention-back {
  margin-top: 4em;
  padding-top: 2.2em;

  border-top: 1px solid rgba(40, 38, 34, 0.18);

  text-align: center;
  font-size: 0.8rem;
  letter-spacing: 0.1em;
}

.attention-back a {
  text-decoration: none;
  padding-bottom: 4px;

  border-bottom: 1px solid rgba(40, 38, 34, 0.4);
}

.attention-back a:hover {
  opacity: 0.6;
}


/* =========================
   MOBILE
========================= */

@media (max-width: 600px) {

  .attention-page {
    width: 88%;
    margin: 4vh auto;
    padding: 2.7em 1.7em 2.8em;
  }


  /* HEADER */

  .attention-header h1 {
    font-size: 1.3rem;
    letter-spacing: 0.18em;
  }

  .attention-subtitle {
    font-size: 0.64rem;
  }


  /* COLOR LINE */

  .attention-rule {
    margin: 1.7em 0 2.3em;
  }


  /* 作者コメント */

  .attention-intro {
    font-size: 0.78rem;
    line-height: 2.15;
  }


  /* 資料 */

  .attention-data {
    margin-top: 2.7em;
    padding-top: 2.2em;

    font-size: 0.78rem;
    line-height: 2.05;
  }

  .attention-data p {
    margin-bottom: 2em;
  }


  /* BACK */

  .attention-back {
    margin-top: 3.2em;
    padding-top: 2em;

    font-size: 0.76rem;
  }
}