@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+JP:wght@100..900&family=Rubik:ital,wght@0,300..900;1,300..900&display=swap');

html {
    width: 100%;
    overflow-y: scroll;
}
body {
    margin: 0;
    font-size: 16px;
    font-family: "Noto Sans JP", sans-serif;
    line-height: 200%;
    color: #000;
    background: #DDD;
}
* {
    box-sizing: border-box;
}
img {
    vertical-align: bottom;
    max-width: 100%;
    height: auto;
}
a {
    color: #333;
    transition: .5s;
}
a:hover {
    text-decoration: none;
}
ul,
ul li {
    margin: 0;
    padding: 0;
    list-style: none;
}
.txt_yellow {
    color: #fff500;
}

/* オーバーレイ */
.overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background: rgba(0, 0, 0, 0.5);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease-in-out;
    z-index: 1001;
}
.overlay.active {
    opacity: 1;
    visibility: visible;
}