body {
    background-image: url("../images/background.jpg");
    background-size: cover;
    background-repeat: no-repeat;
  }

@media screen and (max-width: 767px) {
    body {
        background-size: 767px;
    }
}

  .text-shadow{
    text-shadow: 1px 2px 3px #000000;
  }

  .box-kadomaru{
    border-radius: 30px 30px 30px 30px;
    background-color: rgb(243, 243, 243 , 80%);
    box-shadow: 5px 5px 10px rgb(56, 56, 56);
  }

  .arrow-button{
    /* ボタンのCSS */
    border-radius: 8px;
    color: rgb(55, 85, 97);
    display: block;
    padding: 8px;
    position: relative;
    text-align: center;
    text-decoration: none;
    width: 100%;
}

.arrow-button::after{
    content: '';
    border: 0;
    border-top: solid 2px rgb(55, 85, 97);
    border-right: solid 2px rgb(55, 85, 97);
    display: inline-block;
    width: 10px;
    height: 10px;
    position: absolute;
    top: 50%;
    right: 20px;
    transform: translateY(-50%) rotate(45deg);
}

.text-osusume{
    font-size: 0.625rem;
    line-height: 1rem;
}

.center{
    margin: 0 auto;
}