:root {
    --bg-color: #f4f4f9;
    --text-color: #333;
    --primary-color: #5b21b6;
    --primary-text: #fff;
    --card-bg: #fff;
    --border-color: #ddd;
    --highlight-bg: #e9d5ff;
    --player-bg: #ffffff;
    --shadow-color: rgba(0, 0, 0, 0.1);
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg-color: #121212;
        --text-color: #e0e0e0;
        --primary-color: #7c3aed;
        --card-bg: #1e1e1e;
        --border-color: #333;
        --highlight-bg: #3b0764;
        --player-bg: #1f1f1f;
        --shadow-color: rgba(0, 0, 0, 0.4);
    }
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    padding-bottom: 80px; /* Space for sticky player */
}

.site-container {
    max-width: 900px;
    margin: 0 auto;
    padding: 1rem;
}

.site-header {
    padding-bottom: 1rem;
    margin-bottom: 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-color);
    text-decoration: none;
}

.page-title, .playlist-header h1 {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

/* Folder Grid */
.folder-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 1rem;
}

.folder-card {
    display: flex;
    align-items: center;
    background-color: var(--card-bg);
    padding: 1rem;
    border-radius: 8px;
    text-decoration: none;
    color: var(--text-color);
    box-shadow: 0 2px 5px var(--shadow-color);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.folder-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 4px 10px var(--shadow-color);
}

.folder-icon {
    font-size: 2rem;
    margin-right: 1rem;
}

.folder-title {
    font-weight: 600;
    display: block;
}

.folder-meta {
    font-size: 0.85rem;
    opacity: 0.7;
}

/* Playlist Page */
.playlist-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 1rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

.playlist-actions {
    display: flex;
    gap: 0.5rem;
}

#filter-input {
    padding: 0.5rem;
    border: 1px solid var(--border-color);
    background-color: var(--bg-color);
    color: var(--text-color);
    border-radius: 4px;
}

.button {
    padding: 0.5rem 1rem;
    border: none;
    background-color: var(--primary-color);
    color: var(--primary-text);
    border-radius: 4px;
    cursor: pointer;
    font-weight: 600;
}

/* Track List */
.track-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.track-item {
    display: flex;
    align-items: center;
    padding: 0.75rem;
    background-color: var(--card-bg);
    border-radius: 6px;
    cursor: pointer;
    border: 1px solid transparent;
}

.track-item:hover {
    background-color: var(--highlight-bg);
}
.track-item.playing {
    background-color: var(--highlight-bg);
    border-color: var(--primary-color);
}

.track-play-button button {
    background: none;
    border: none;
    font-size: 1.5rem;
    width: 44px;
    height: 44px;
    cursor: pointer;
    color: var(--primary-color);
    display: flex;
    align-items: center;
    justify-content: center;
}

.track-details {
    flex-grow: 1;
    margin-left: 0.5rem;
}

.track-title {
    font-weight: 500;
}
.track-filename {
    font-size: 0.8rem;
    opacity: 0.6;
}

.track-meta {
    display: flex;
    gap: 1rem;
    font-size: 0.9rem;
    opacity: 0.8;
    margin-left: 1rem;
}

/* Audio Player */
.audio-player {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    background-color: var(--player-bg);
    border-top: 1px solid var(--border-color);
    box-shadow: 0 -2px 10px var(--shadow-color);
    display: grid;
    grid-template-columns: 1fr 2fr 1fr;
    align-items: center;
    padding: 0.5rem 1rem;
    gap: 1rem;
    height: 80px;
}

.player-track-info {
    font-weight: 500;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.player-controls {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0.5rem;
}

.player-controls button {
    background: none;
    border: none;
    font-size: 1.5rem;
    width: 44px;
    height: 44px;
    cursor: pointer;
    color: var(--text-color);
}
#play-pause-btn {
    font-size: 2rem;
}

.player-progress {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.player-progress span {
    font-size: 0.8rem;
    min-width: 40px;
    text-align: center;
}

input[type="range"] {
    -webkit-appearance: none;
    width: 100%;
    height: 5px;
    background: var(--border-color);
    border-radius: 5px;
    outline: none;
    cursor: pointer;
}
input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 15px;
    height: 15px;
    background: var(--primary-color);
    border-radius: 50%;
}
input[type="range"]::-moz-range-thumb {
    width: 15px;
    height: 15px;
    background: var(--primary-color);
    border-radius: 50%;
    border: none;
}


.player-volume {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 0.5rem;
}
.player-volume input {
    max-width: 100px;
}

@media (max-width: 768px) {
    .audio-player {
        grid-template-columns: 1fr;
        grid-template-rows: auto auto;
        height: auto;
        padding: 0.75rem;
        gap: 0.5rem;
    }
    .player-track-info { grid-row: 1; text-align: center; }
    .player-controls { grid-row: 2; }
    .player-progress { grid-row: 3; }
    .player-volume { display: none; } /* Hide volume on mobile for simplicity */
    
    .track-meta { display: none; } /* Hide track meta on small screens */
}