@font-face {
  font-family: 'Material Icons';
  font-style: normal;
  font-weight: 400;
  src: url(https://example.com/MaterialIcons-Regular.eot);
  /* For IE6-8 */
  src: local('Material Icons'),
    local('MaterialIcons-Regular'),
    url(https://example.com/MaterialIcons-Regular.woff2) format('woff2'),
    url(https://example.com/MaterialIcons-Regular.woff) format('woff'),
    url(https://example.com/MaterialIcons-Regular.ttf) format('truetype');
}

.material-icons {
  font-family: 'Material Icons';
  font-weight: normal;
  font-style: normal;
  font-size: 24px;
  /* Preferred icon size */
  line-height: 1;
  text-transform: none;
  letter-spacing: normal;
  word-wrap: normal;
  white-space: nowrap;
  direction: ltr;
  display: inline-flex;
  vertical-align: middle;

  /* Support for all WebKit browsers. */
  -webkit-font-smoothing: antialiased;
  /* Support for Safari and Chrome. */
  text-rendering: optimizeLegibility;

  /* Support for Firefox. */
  -moz-osx-font-smoothing: grayscale;

  /* Support for IE. */
  font-feature-settings: 'liga';
}

/* Rules for sizing the icon. */

.material-icons.md-36 {
  font-size: 36px;
}

.table > :not(caption) > * > * {
  vertical-align: middle;
}

/* フローティングメニュー */

.floating-nav {
  position: fixed;
  width: 50px;
  right: 0;
  top: 10%;
  cursor: pointer;
}

.floating-nav a {
  color: white;
  writing-mode: vertical-rl;
  text-orientation: upright;
  text-decoration: none;
}

/* TOTOPアイコン */
.totop {
  position: absolute;
  top: -60px;
  right: 40px;
}
/* =============================================
メディアクエリ
============================================= */

/* 大デバイス（デスクトップ, 1200px 未満）
==============================================*/
@media screen and (max-width: 1199.98px) {
  .herounit h1 {
    margin-top: 10rem;
  }
}

/* END */
/* 中デバイス（タブレット, 992px 未満）
==============================================*/
@media screen and (max-width: 991.98px) {
  .container {
    max-width: 740px;
  }
}

/* END */
/* 小デバイス（横向きモバイル, 768px 未満）
==============================================*/
@media screen and (max-width: 767.98px) {
  h1 {
    font-size: 2rem;
    font-weight: bold;
    line-height: 1.2;
  }

  #sec3 {
    background-image: none;
  }

  header .navbar-brand {
    width: 70%;
  }

  header .navbar-brand .logo {
    width: 100%;
  }

  header .navbar-nav {
    border-top: 1px solid #fff;
  }

  .footer-logo {
    width: 100%;
  }

}

/* END */
/* モバイル画面でのスタイル */
@media (max-width: 768px) {
    img {
        position: static;
        width: 100%; /* 幅を画面全体に合わせる */
        height: auto; /* アスペクト比を維持 */
    }

    .card {
        position: static;
        margin: 20px auto; /* 中央寄せ */
        width: 90%; /* 横幅を調整 */
    }

    .btn {
        position: static;
        width: 100%; /* ボタン幅を全体に */
        text-align: center;
    }
}

/* END */
/* 極小デバイス（縦向きモバイル, 576px 未満）
==============================================*/
@media screen and (max-width: 575.98px) {
  .display-3 {
    line-height: 0.8em;
  }

  .display-4 {
    font-size: 2rem;
    line-height: 1.2;
  }
}