.bd-placeholder-img {
      font-size: 1.125rem;
      text-anchor: middle;
      -webkit-user-select: none;
      -moz-user-select: none;
      user-select: none;
    }

    @media (min-width: 768px) {
      .bd-placeholder-img-lg {
        font-size: 3.5rem;
      }
    }

    .b-example-divider {
      width: 100%;
      height: 3rem;
      background-color: #0000001a;
      border: solid rgba(0, 0, 0, 0.15);
      border-width: 1px 0;
      box-shadow:
        inset 0 0.5em 1.5em #0000001a,
        inset 0 0.125em 0.5em #00000026;
    }

    .b-example-vr {
      flex-shrink: 0;
      width: 1.5rem;
      height: 100vh;
    }

    .bi {
      vertical-align: -0.125em;
      fill: currentColor;
    }

    .nav-scroller {
      position: relative;
      z-index: 2;
      height: 2.75rem;
      overflow-y: hidden;
    }

    .nav-scroller .nav {
      display: flex;
      flex-wrap: nowrap;
      padding-bottom: 1rem;
      margin-top: -1px;
      overflow-x: auto;
      text-align: center;
      white-space: nowrap;
      -webkit-overflow-scrolling: touch;
    }

    .btn-bd-primary {
      --bd-violet-bg: #712cf9;
      --bd-violet-rgb: 112.520718, 44.062154, 249.437846;
      --bs-btn-font-weight: 600;
      --bs-btn-color: var(--bs-white);
      --bs-btn-bg: var(--bd-violet-bg);
      --bs-btn-border-color: var(--bd-violet-bg);
      --bs-btn-hover-color: var(--bs-white);
      --bs-btn-hover-bg: #6528e0;
      --bs-btn-hover-border-color: #6528e0;
      --bs-btn-focus-shadow-rgb: var(--bd-violet-rgb);
      --bs-btn-active-color: var(--bs-btn-hover-color);
      --bs-btn-active-bg: #5a23c8;
      --bs-btn-active-border-color: #5a23c8;
    }

    .bd-mode-toggle {
      z-index: 1500;
    }

    .bd-mode-toggle .bi {
      width: 1em;
      height: 1em;
    }

    .bd-mode-toggle .dropdown-menu .active .bi {
      display: block !important;
    }

    h1,
    #lblKana {
      font-size: clamp(5rem, 2vw + 1rem, 10rem);
    }

    .card-japanese {
      font-size: 14px;
    }

    .card-reading {
      font-size: 14px;
    }

    .word-typing-subtitle {
      color: #a2a2a2;
    }