body {
    margin: 0;
    font-family: sans-serif;
    color: black;
    background-color: white;
    min-height: 120vh;
    position: relative;
}

.background-image {
  display: flex;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    z-index: -1;
}
.main-content {
    padding: 0px;
}
.footer-info {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
/*    background-color: transparent; */
/*    background-color: white; */
    background-color: rgba(255, 255, 255, 0.8);
    color: black;
    padding: 15px 20px;
    text-align: center;
    box-sizing: border-box;
    z-index: 1000;
}

.btnarea {
    width: 80%;
    height: auto;
    margin-left: auto;
    margin-right: auto;
    text-align: center;
}

.btnarea img {
    max-width: 100%; 
    height: auto;
}

.copy {
  font-size:x-small;
  color: black;
}

.txt {
  font-size:xx-large;
  color: black;
}
.title {
   font-size:x-large;
   color: black;            /* 文字色を黒に (背景が白なので見やすくするため) */
}