/* menu(三本線) */
.menu {
    position: fixed;
    top: 0;
    width: 40px;
    height: 40px;
    cursor: pointer;
    z-index: 3;
    transition: .3s;
}
/* intersectionObserverAPI */
.menu.toggle {
    width: 16px;
    height: 16px;
}
.menu div {
    position: absolute;
    width: 100%;
    height: 4px;
    background: white;
}
.menu div:first-child {
    transition: .3s;
}
.menu div:nth-child(2) {
    top: 50%;
    transform: translateY(-50%);
    transition: .3s;
}
.menu div:last-child {
    bottom: 0;
    transition: .3s;
}

/* 三本線の変化 */
.first {
    top: 50%;
    transform: translateY(-50%) rotate(-45deg) scaleX(1.4);
}
.second {
    opacity: 0;
}
.last {
    top: 50%;
    transform: translateY(-50%) rotate(45deg) scaleX(1.4);
}

/* 左サイド画面 */
aside {
    position: fixed;
    top: 0;
    left: -320px;
    width: 320px;
    height: 100vh;
    background: #111;
    transition: .3s;
    z-index: 2;
    /* コンテンツがあふれたらscroll表示 */
    overflow: auto;
}
  
.show {
    left: 0;
}

.i {
    display: flex;
    justify-content: center;
    gap: 16px;
    padding: 4px 0 8px 32px;
}
.i > a {
    text-decoration: none;
    color: white;
    font-size: 24px;
    text-shadow:
        0 0 8px  mediumspringgreen,
        0 0 16px white;
}