:root{
    --gap: 20px;

    --st-black: #0000005b;
    --st-white: #ffffff5b;

    --purple: #000821;
}

*{
    font-family: Orbitron , DotGothic16 , sans-serif;
    color: #fff;
}

body{
    margin: 0;
    overflow: hidden;
}

h1,h2,h3{
    margin: 0;
    font-weight: 500;
}

/*load*/
#sec-loading{
    width: 100vw;
    height: 100vh;
    position: fixed;
    top: 0;
    left: 0;
    z-index: 5;
    background-color: var(--purple);
    visibility: visible;
    opacity: 1;
    transition: all .2s;
}

#sec-loading.loaded{
    visibility: hidden;
    opacity: 0;
}

.load-wrap{
    width: 100%;
    height: 100%;
    position: relative;
}

.load-circle{
    width: 10vw;
    height: 10vw;
    max-width: 80px;
    max-height: 80px;
    position: absolute;
    inset: 50%;
    translate: -50% -50%;
    padding: 50px;
    border-radius: 50%;
    border: 1px solid #fff;
}

@media screen and (min-width: 768px) {
    .load-circle{
        width: 10vw;
        height: 10vw;
    }
}

.load-circle-anim-wrap{
    position: relative;
    width: 100%;
    height: 100%;
    translate: 0 -100%;
    animation: load-rotate-circle 1.8s forwards linear;
}

.load-circle-anim{
    position: absolute;
    inset: -33px -33px;
    width: 20%;
    height: 20%;
    border-radius: 50%;
    background-color: #fff;
}

@keyframes load-rotate-circle {
    from{
        rotate: 45deg;
    }

    to{
        rotate: 405deg;
    }
}

.load-rotate{
    width: 100%;
    height: 100%;
    background-image: url(../img/load-negi.png);
    background-size: contain;
    background-repeat: no-repeat;
    image-rendering: pixelated;
    transition: all .4s;
    animation:  rotate-360 1s forwards cubic-bezier(.5,0,.7,1.15),
                load-rotate-star 1s forwards 1.1s cubic-bezier(0,0,0,.5);
}

.load-rotate.active{
    background-image: url(../img/load-star.png);
}

@keyframes rotate-360 {
    from{
        rotate: 0;
    }

    to{
        rotate: 360deg;
    }
}

@keyframes load-rotate-star {
    from{
        transform: translateX(0);
    }

    to{
        transform: translateX(120%);
    }
}

.load-txt{
    position: absolute;
    inset: 50% 70%;
    translate: -50% -50%;
}

/*menu*/
#sec-menu{
    width: 100vw;
    height: 100vh;
    background-image: url(../img/bg-sky-starry.png);
    display: flex;
    flex-flow: column;
    align-items: start;
    justify-content: center;
    position: relative;
}

.menu-grid{
    width: 100vw;
    height: 60vh;
    max-width: 400px;
    margin-left: 5px;
    display: grid;
    grid-template-columns: 95%;
    justify-content: start;
    gap: var(--gap);
}

.select-song-txt{
    color: #fff;
    margin-left: 5px;
    position: absolute;
    top: 30px;
}

.select-song-btn{
    color: #fff;
    cursor: pointer;
    background-color: var(--st-black);
    border: none;
    border-radius: 5px;
    box-shadow: 5px 5px 0 var(--st-white);
    font-size: large;
    scale: 100%;
    translate: 0 0;
    transition: all .2s;
}

@media (hover: hover) {
    .select-song-btn:hover{
        translate: 5% 0;
        transition: all .2s;
    }
}

.select-song-btn:active{
    scale: 95%;
    transition: all .2s;
}