* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --color1: #e8eef2;
    --color2: #d6c9c9;
    --color3: #99a3ac;
    --color4: #1c2e3b;
    --color5: #37393a;
    --color6: #3e5261b9;
    --transparent: rgba(233, 233, 233, 0);
}

body {
    font-family: Arial, Helvetica, sans-serif;
    text-align: center;
}

#player-container {
    max-width: 550px;
    margin-right: auto;
    margin-left: auto;
    margin-top: 10%;
    border: 6px solid;
    border-color: var(--color2);
    background-color: var(--color5);
}

.player-title {
    color: var(--color1);
    font-size: 25px;
    margin-top: 10px;
    font-family: 'optima', serif;
}

#audio-player {
    width: 90%;
    margin-bottom: 20px;
    margin-top: 10px;
}

.controls {
    display: flex;
    justify-content: center;
    margin-top: 0px;
    margin-bottom: 20px;
}

.control-button {
    display: flex;
    margin: 0 13px;
    padding: 0;
    background-color: var(--transparent);
    border: none;
    cursor: pointer;
}

.icon {
    fill: var(--color1);
    width: 60px;
    height: 60px;
}

ion-icon {
    font-size: 60px;
    color: var(--color1);
    padding: 0;
    margin: 0;
}

@media (hover: hover) {
    ion-icon:hover {
    color: var(--color3)
    }
}

.song-title {
    font-size: 18px;
    margin-bottom: 10px;
    color: var(--color1);
}

#song-image {
    width: 90%;
    height: auto;
    margin-top: 10px;
}

#list-container {
    width: 90%;
    margin: 0 auto;
    margin-top: 15px;
    margin-bottom: 15px;
    background-color: var(--color4);
    border: 1px solid var(--color1);
    max-height: 150px;
    overflow-y: scroll;
    overflow-x: hidden;
    scroll-behavior: smooth;
}

#song-list {
    padding: 5px;
    cursor: pointer;
    color: var(--color1);
}

#song-list li {
    margin-top: 5px;
}

#song-list ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    flex-wrap: nowrap;
    min-height: 0;
    align-items: flex-start;
    padding-left: 5px;
    margin-top: 0px;
    margin-bottom: 0px;
    margin: 0px;
}

/*************** Mouse Behavior ****************/

@media (hover: hover) {
    #song-list li:hover {
        color: var(--color3);
        transform: scale(1.01);
    }
    .icon:hover {
        fill: var(--color3);
        transform: scale(1.06);
    }
}

.song-list-active {
    color: var(--color3);
    transform: scale(1.04) translateZ(0);
    will-change: transform;
}

/*************** Mobile Formatting ****************/

@media (max-width: 440px) {
    #player-container {
        padding-top: 4vh;
        border-width: 4px;
        width: 100%;
        margin: 0;
    }
    #audio-player {
        height: 10vw;
    }
    ion-icon {
        font-size: 15vw;
    }
}

@media (max-width: 390px) {
    #song-list {
    font-size: 4vw;
    }
    .player-title {
        font-size: 6vw;
    }
    .song-title {
        font-size: 4.5vw;
    }
}

/************* Force Repaint *************/

#list-container, #song-list {
    backface-visibility: hidden;
    perspective: 1000px;
    will-change: transform;
}

/************* Custom Scrollbar *************/

#list-container::-webkit-scrollbar {
    width: .6em;
}

#list-container::-webkit-scrollbar-track {
    background-color: var(--color6);
    border-radius: 100vw;
    margin-block: .18em;
}

#list-container::-webkit-scrollbar-thumb {
    background-color: var(--color4);
    border-radius: 100vw;
    border: .18em solid var(--color6);
}