@charset "utf-8";

header #burger_nav {
    background-color: rgba(0, 73, 109, 0.8);
    width: 100%;
    height: 100%;
    overflow: hidden;

    color: white;
    font-size: 18px;
    line-height: 0.7;
    letter-spacing: 0.2em;

    position: fixed;
    top: -100%;
    left: 0;
    z-index: 100;
    transition: all 1s ease;
}

header .burger_nav_list {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

header .burger_nav_list li a:hover {
    color: var(--maincolor);
    text-decoration: underline 1px;
    transition: all .3s ease;
}

header #burger_nav li {
    margin-bottom: 25px;
}

header #burger_nav span {
    font-size: 9px;
    letter-spacing: 0.1em;
}

header .nav_artist {
    font-size: 14px;
    text-indent: 2em;
    letter-spacing: 0.1em;
    margin-bottom: 30px;
}

header #burger {
    display: block;
    width: 50px;
    height: 64px;
    position: fixed;
    right: 25px;
    top: 30px;
    cursor: pointer;
    z-index: 100;
}

header .line {
    display: block;
    width: 50px;
    height: 1px;
    background-color: black;
    border-radius: 1px;
    position: absolute;
    z-index: 900;
    transition: all 1s ease;
}

header #line1 {
    top: 0;
}

header #line2 {
    top: 20px;
}

header #line3 {
    top: 40px;
}

header #line4 {
    text-align: center;
    position: relative;
    top: 40px;
    transition: all 1s ease;
}

/* jsで表示されるCSS */
.action {
    transform: translateY(100%);
}

.line_1 {
    transform: translateY(20px) rotate(-45deg);
}

.line_2 {
    opacity: 0;
}

.line_3 {
    transform: translateY(-20px) rotate(45deg);
}

.line_4 {
    color: #fff;
}


/* ---responsible design for iPad pro--- */
@media screen and (max-width: 1024px) {
    header #burger {
        width: 35px;
        height: 44px;
        top: 22px;
    }

    header .line {
        width: 35px;
    }

    header #line2 {
        top: 12px;
    }

    header #line3 {
        top: 24px;
    }

    header #line4 {
        top: 28px;
        font-size: 14px;
    }

    .line_1 {
        transform: translateY(12px) rotate(-45deg);
    }

    .line_3 {
        transform: translateY(-12px) rotate(45deg);
    }

}

/* ---responsible design for iPad pro--- */