:root {
    /* Light Theme (Default) */
    --bg-color: #f8f9fa;
    --text-color: #212529;
    --card-bg: #ffffff;
    --navbar-bg: rgba(255, 255, 255, 0.85);
    --border-color: #e9ecef;
    --primary-color: #0d6efd;
    --hover-bg: #f1f3f5;
    --player-bg: rgba(255, 255, 255, 0.95);
    --player-border: #e9ecef;
}

[data-theme="dark"] {
    /* Dark Theme */
    --bg-color: #121212;
    --text-color: #ffffff;
    --card-bg: #181818;
    --navbar-bg: rgba(18, 18, 18, 0.85);
    --border-color: #282828;
    --primary-color: #1db954; /* Spotify Green */
    --hover-bg: #282828;
    --player-bg: rgba(24, 24, 24, 0.95);
    --player-border: #282828;
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    transition: background-color 0.3s ease, color 0.3s ease;
    padding-bottom: 100px; /* Space for the bottom player */
}

/* Glassmorphism Navbar */
.navbar {
    background-color: var(--navbar-bg) !important;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    transition: background-color 0.3s ease;
}

.navbar-brand {
    color: var(--text-color) !important;
    font-weight: bold;
}

.theme-toggle-btn {
    background: none;
    border: none;
    color: var(--text-color);
    font-size: 1.2rem;
    cursor: pointer;
    transition: color 0.3s;
}

.theme-toggle-btn:hover {
    color: var(--primary-color);
}

/* Search Bar */
.search-container {
    max-width: 500px;
    margin: 2rem auto;
}
.search-input {
    background-color: var(--card-bg);
    color: var(--text-color);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 10px 20px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.05);
}
.search-input:focus {
    background-color: var(--card-bg);
    color: var(--text-color);
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.25rem rgba(29, 185, 84, 0.25);
}

/* Main Content Area */
.main-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Song List Table/Grid */
.song-list-header {
    font-size: 1.5rem;
    font-weight: bold;
    margin-bottom: 1rem;
    color: var(--text-color);
}

.song-item {
    display: flex;
    align-items: center;
    padding: 10px 15px;
    border-radius: 8px;
    margin-bottom: 8px;
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    cursor: pointer;
    transition: background-color 0.2s ease, transform 0.2s ease;
}

.song-item:hover {
    background-color: var(--hover-bg);
}

.song-item.active {
    background-color: var(--hover-bg);
    border-color: var(--primary-color);
}

.song-item img {
    width: 50px;
    height: 50px;
    border-radius: 5px;
    object-fit: cover;
    margin-right: 15px;
}

.song-info {
    flex-grow: 1;
}

.song-title {
    font-weight: 600;
    margin-bottom: 0;
    font-size: 1rem;
    color: var(--text-color);
}

.song-artist {
    color: #888;
    font-size: 0.85rem;
    margin-bottom: 0;
}

.play-icon {
    color: var(--primary-color);
    font-size: 1.2rem;
    opacity: 0;
    transition: opacity 0.2s;
}

.song-item:hover .play-icon, .song-item.active .play-icon {
    opacity: 1;
}

/* Fixed Bottom Player (Spotify Vibe) */
.player-bar {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: 90px;
    background-color: var(--player-bg);
    border-top: 1px solid var(--player-border);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 20px;
    z-index: 1000;
    transition: transform 0.3s ease;
}

/* Hidden state before a song plays */
.player-bar.hidden {
    transform: translateY(100%);
}

.player-left {
    display: flex;
    align-items: center;
    width: 30%;
}

.player-left img {
    width: 60px;
    height: 60px;
    border-radius: 5px;
    object-fit: cover;
    margin-right: 15px;
}

.player-info h5 {
    margin: 0;
    font-size: 1rem;
    font-weight: bold;
    color: var(--text-color);
}

.player-info p {
    margin: 0;
    font-size: 0.85rem;
    color: #888;
}

.player-center {
    width: 40%;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.player-controls {
    display: flex;
    align-items: center;
    gap: 20px;
    margin-bottom: 5px;
}

.player-controls button {
    background: none;
    border: none;
    color: var(--text-color);
    font-size: 1.2rem;
    cursor: pointer;
    transition: color 0.2s, transform 0.2s;
}

.player-controls button:hover {
    color: var(--primary-color);
}

.player-controls .play-btn {
    font-size: 2.2rem;
}

.player-controls .play-btn:hover {
    transform: scale(1.1);
}

/* Audio Player (Hidden Default, we build custom controls above) */
#mainPlayer {
    width: 100%;
    height: 30px;
    outline: none;
}
/* We override default player look using webkit if needed, but standard audio works for now if we just style it minimally */
audio {
    width: 100%;
    max-width: 400px;
}
/* Making the native audio player fit the dark/light mode */
audio::-webkit-media-controls-panel {
    background-color: var(--card-bg);
}
audio::-webkit-media-controls-play-button,
audio::-webkit-media-controls-mute-button,
audio::-webkit-media-controls-timeline,
audio::-webkit-media-controls-current-time-display,
audio::-webkit-media-controls-time-remaining-display,
audio::-webkit-media-controls-volume-slider {
    filter: invert(var(--invert-controls));
}
[data-theme="dark"] {
    --invert-controls: 1;
}
[data-theme="light"] {
    --invert-controls: 0;
}

.player-right {
    width: 30%;
    display: flex;
    justify-content: flex-end;
}