@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+JP:wght@300;400;700&display=swap');

* {
    font-family: "Noto Sans JP", "Hiragino Kaku Gothic ProN", Meiryo, sans-serif;
}

body {
    margin: 0;
    background-color: #E9F4E5;
}

img {
    display: block;
    /* margin: auto; */
}

.polygon_image {
    width: 20%;
}

a {
    width: 80%;
}

/* スマホ向けスタイル */
@media screen and (max-width: 767px) {
    body {
        background-color: #ffffff;
        font-size: 14px;
    }
}

.button {
    font-size: 22px;
    font-weight: bold;
}

.m1 {
    font-size: 20px;
    font-weight: bold;
}

/* other */
.description {
    font-size: 16px;
    font-weight: normal;
    ;
}

.description_small {
    font-size: 14px;
    font-weight: normal;
    ;
}

.center {
    text-align: center;
}

.black {
    color: black;
}

.polygon {
    padding-bottom: 5%;
}

#center-line {
    position: fixed;
    top: 0;
    left: 50%;
    height: 100%;
    width: 2px;
    background-color: black;
    z-index: 9999;
    /* 最前面に表示するための z-index */
}

* :not(ul) {
    overflow-x: hidden;
}

.polygon {
    animation: move-y .5s infinite alternate ease-in-out;
}

@keyframes move-y {
    from {
        transform: translateY(0);
    }

    to {
        transform: translateY(10px);
    }
}

.pop {
    opacity: 0;
  }
  
  .pop.visible {
    animation: fadeIn 2.5s;
    animation-fill-mode: forwards;
    -webkit-animation: fadeIn 2.5s; /* 追加 */
    -webkit-animation-fill-mode: forwards; /* 追加 */
    z-index: 10; /* 追加 */
  }
  
  @keyframes fadeIn {
    0% {
      opacity: 0;
    }
  
    100% {
      opacity: 1;
    }
  }
  
  /* Safari 用にキーフレームを追加 */
  @-webkit-keyframes fadeIn {
    0% {
      opacity: 0;
    }
  
    100% {
      opacity: 1;
    }
  }