/*- Color Variables -*/
:root {
    --bg-gradient: linear-gradient(135deg, #b2d2ff, #d2e6ff, #89afd8);
    --player-bg: rgba(255, 255, 255, 0.1);
    --border-color: rgba(255, 255, 255, 0.5);
    --box-shadow: rgba(0, 0, 0, 0.6);
    --text-primary: #1a3a5c;
    --text-secondary: #4a7ab5;
    --icon-color: #1a3a5c;
}

body.dark-mode {
    --bg-gradient: linear-gradient(135deg, #1a1a2e, #172e6b, #132d4d);
    --player-bg: rgba(255, 255, 255, 0.1);
    --box-shadow: rgb(255, 255, 255);
    --text-primary: #e8f4ff;
    --text-secondary: #a8c8f8;
    --icon-color: #e8f4ff;
}

/*- CSS Reset — removes default styles -*/
*, *::after, *::before {
    padding: 0;
    margin: 0;
    box-sizing: border-box;
}

/*- Body Styling -*/
body {
    background: var(--bg-gradient);
    height: 100vh;
}

/*- Container Styling -*/
.container {
    width: 100%;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}
.music-player {
    background: var(--player-bg);
    text-align: center;
    background-color: var(--player-bg);
    border: 3px solid var(--border-color);
    border-radius: 20px;
    padding: 30px;
    width: 380px;
}

/*- Head/Nav Styling -*/
nav {
    display: flex;
    flex-direction: row;
    justify-content: space-between;
}
.playlist, .theme-toggle {
    width: 40px;
    height: 40px;
    line-height: 33px;
    color: var(--text-primary);
    background-color: var(--player-bg);
    border: 3px solid var(--border-color);
    border-radius: 50%;
    cursor: pointer;
    transition: box-shadow 0.3s ease;
}
.playlist:hover, .theme-toggle:hover {
    box-shadow: 0 0 20px var(--box-shadow)
}

/*- Playlist Styling -*/
.list {
    position: fixed;
    top: 0;
    left: -300px; /* hidden off-screen */
    width: 300px;
    height: 100vh;
    color: var(--text-primary);
    background: var(--player-bg);
    border-right: 3px solid var(--border-color);
    padding: 20px;
}
.list.active {
    left: 0;
    animation: slide-in 0.3s ease-in forwards;
}
@keyframes slide-in {
    from {transform: translateX(-300px);}
    to {transform: translateX(0);}
}
.list .head {
    display: flex;
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
}
.back {
    width: 40px;
    height: 40px;
    line-height: 33px;
    color: var(--text-primary);
    background-color: var(--player-bg);
    border: 3px solid var(--border-color);
    border-radius: 50%;
    cursor: pointer;
    transition: box-shadow 0.3s ease;
}
.back:hover {
    box-shadow: 0 0 20px var(--box-shadow)
}
.back.closing {
    left: 0;
    animation: slide-out 0.3s ease forwards;
}
@keyframes slide-out {
    from { transform: translateX(0); }
    to { transform: translateX(-300px); }
}

/* Playlist Items */
#playlist-songs {
    padding: 30px 0;
    list-style: none;
    text-align: left;
}
.listItem-song {
    color: var(--text-primary);
    font-size: 1.1rem;
    padding: 5px 0;
    cursor: pointer;
}
.listItem-song.bold {
    font-weight: bold;
}
.listItem-song:hover {
    font-weight: bold;
}

/*- Song Image/Title/Artist Styling -*/
.cover-photo {
    border: 2px solid var(--border-color);
    border-radius: 50%;
    width: 200px;
    height: 200px;
    margin: 20px 0;
    padding: 5px;
}
#song-title {
    font-size: 1.5rem;
    color: var(--text-primary);
    margin: 10px 0 5px 0;
}
#artist {
    font-size: 1rem;
    color: var(--text-secondary);
}

/*- Song Timeline (current time, progress bar and duration ) Styling -*/
.timeline {
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
}
#current-time, #duration {
    color: var(--text-primary);
}
#progress {
    -webkit-appearance: none;
    width: 75%;
    height: 6px;
    background-color: var(--text-primary);
    border-radius: 4px;
    margin: 40px 0;
    cursor: pointer;
}
#progress::-webkit-slider-thumb {
    -webkit-appearance: none;
    height: 20px;
    width: 20px;
    background: var(--icon-color);
    border: 5px solid var(--text-secondary);
    border-radius: 50%;
}

/*- Control Buttons Styling -*/
.controls {
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    margin: 10px 0;
}
.shuffle, .repeat,
.forward, .backward {
    width: 40px;
    height: 40px;
    line-height: 33px;
    color: var(--text-primary);
    background-color: var(--player-bg);
    border: 3px solid var(--border-color);
    border-radius: 50%;
    cursor: pointer;
    transition: box-shadow 0.3s ease;
}
.shuffle:hover, .repeat:hover,
.forward:hover, .backward:hover {
    box-shadow: 0 0 20px var(--box-shadow)
}
.repeat.active,
.shuffle.active {
    box-shadow: 0 0 20px var(--box-shadow);
}
.play-pause-btns {
    width: 50px;
    height: 50px;
    line-height: 44px;
    color: var(--text-primary);
    background-color: var(--player-bg);
    border: 3px solid var(--border-color);
    border-radius: 50%;
    cursor: pointer;
    transition: box-shadow 0.3s ease;
}
.play-pause-btns:hover {
    box-shadow: 0 0 20px var(--box-shadow)
}

/*- Volume Button Styling -*/
.controls-2 {
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: space-evenly;
    margin: 40px 0 20px 0;
}
#volume {
    width: 40px;
    height: 40px;
    line-height: 33px;
    color: var(--text-primary);
    background-color: var(--player-bg);
    border: 3px solid var(--border-color);
    border-radius: 50%;
    cursor: pointer;
    transition: box-shadow 0.3s ease,
                display 0.3s;
}
#volume:hover {
    box-shadow: 0 0 20px var(--box-shadow)
}
.volume-bar {
    display: none;
    -webkit-appearance: none;
    width: 40%;
    height: 6px;
    background-color: var(--text-primary);
    border-radius: 4px;
    cursor: pointer;
}
.volume-bar::-webkit-slider-thumb {
    -webkit-appearance: none;
    height: 20px;
    width: 20px;
    background: var(--icon-color);
    border: 5px solid var(--text-secondary);
    border-radius: 50%;
}