body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

header {
    position: relative;
}

.menu-btn {
    position: fixed; /* fixedに変更 */
    top: 15px;
    right: 15px; /* 左から右へ配置を変更 */
    width: 30px;
    height: 25px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.menu-btn__burger {
    width: 100%;
    height: 3px;
    background-color: #333;
    border-radius: 5px;
    transition: all 0.3s ease;
}

.menu-btn.open .menu-btn__burger {
    background-color: #fff;
    transform: rotate(45deg);
}

.menu-btn.open .menu-btn__burger::before {
    background-color: #fff;
    transform: rotate(90deg);
    top: 0;
}

.menu-btn.open .menu-btn__burger::after {
    background-color: #fff;
    opacity: 0;
}

.menu-btn__burger::before,
.menu-btn__burger::after {
    content: '';
    position: absolute;
    width: 100%;
    height: 3px;
    background-color: #333;
    border-radius: 5px;
    transition: all 0.3s ease;
}

.menu-btn__burger::before {
    transform: translateY(-10px);
}

.menu-btn__burger::after {
    transform: translateY(10px);
}

.nav {
    position: fixed; /* fixedに変更 */
    margin:0px;padding:0px;
    top: 0;
    left: 0;
    height: 100vh;
    width: 100%;
    background-color: rgba(0, 0, 0, 0.85); /* 背景を半透明に変更 */
    display: flex;
    align-items: center;
    justify-content: center;
    transform: translateX(-100%);
    transition: transform 0.3s ease-in-out;
    z-index: 999;
}

.nav.open {
    transform: translateX(0);
}

.nav__list {
    margin:0px;padding:0px;
    list-style: none;
    text-align: left;
}

.nav__item {
    margin: 15px 0px 0px 0px;
}

.nav__link {
    color: #fff;
    margin:0px;padding:0px 0px 0px 15px;
    text-decoration: none;
    font-size:18px;line-height:150%;
    transition: color 0.3s ease;
	border-left:3px solid #cccccc;
}

.nav__link:hover {
    color: #ff6347;
}

body.no-scroll {
    overflow: hidden; /* スクロールを無効に */
}