/* --- THEME VARIABLES --- */
:root {
    --bg-color: #f0f2f5;
    --text-color: #212529;
    --card-bg: #ffffff;
    --border-color: #dee2e6;
    --list-hover-bg: #e9ecef;
    --fav-btn-color: #adb5bd;
    --fav-btn-active-color: #ffc107;
    --card-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    --controls-bg: rgba(0, 0, 0, 0.03);
    --overlay-gradient: linear-gradient(to top, rgba(0,0,0,0.7) 0%, rgba(0,0,0,0.3) 40%, transparent 100%);
}

.dark-mode {
    --bg-color: #121212;
    --text-color: #e0e0e0;
    --card-bg: #1e1e1e;
    /* In dark mode, the player card text should be light for readability over the visualizer */
    --player-text-color: #ffffff;
    --player-text-muted-color: #e0e0e0;
    --player-text-shadow: 1px 1px 3px rgba(0,0,0,0.7);
    --overlay-gradient: linear-gradient(to top, rgba(18,18,18,0.8) 0%, rgba(18,18,18,0.4) 40%, transparent 100%);
    --border-color: #333;
    --list-hover-bg: #2a2a2a;
    --fav-btn-color: #6c757d;
    /* Active favorite color (yellow) works well on both themes */
    --card-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
    --controls-bg: rgba(255, 255, 255, 0.05);
}

/* In light mode, player card text also needs to be light */
:root {
    --player-text-color: #ffffff;
    --player-text-muted-color: #f0f0f0;
    --player-text-shadow: 1px 1px 3px rgba(0,0,0,0.5);
}
.dark-mode .text-muted {
    color: #a0a0a0 !important; /* Lighter color for muted text in dark mode */
}


body {
    background-color: var(--bg-color);
    color: var(--text-color);
    transition: background-color 0.3s ease, color 0.3s ease;
    padding-top: 56px; /* Navbar height */
}

.main-container {
    display: flex;
    height: calc(100vh - 56px);
}

/* --- SIDEBAR & STATION LIST --- */
.sidebar {
    width: 350px;
    flex-shrink: 0;
    background-color: var(--card-bg);
    border-left: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    transition: background-color 0.3s ease, border-color 0.3s ease;
}

.station-list-container {
    overflow-y: auto;
    flex-grow: 1;
}

.list-group-item {
    background-color: transparent;
    color: var(--text-color);
    border-bottom: 1px solid var(--border-color) !important;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

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

.list-group-item.active {
    background-color: var(--text-color);
    color: var(--card-bg);
    border-color: var(--text-color) !important;
}

.station-name {
    font-weight: 500;
}

.fav-btn {
    color: var(--fav-btn-color);
}
.fav-btn.favorited {
    color: var(--fav-btn-active-color);
}

/* --- PLAYER AREA --- */
.player-area {
    flex-grow: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
}

.player-card {
    width: 100%;
    max-width: 600px;
    height: 400px;
    background-color: var(--card-bg);
    border-radius: 15px;
    box-shadow: var(--card-shadow);
    overflow: hidden;
    transition: background-color 0.3s ease;
    position: relative;
    display: flex;
    flex-direction: column;
}

#visualizer {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: block;
    z-index: 1;
    border-radius: 15px; /* Match parent */
}

.player-content-overlay {
    position: relative;
    z-index: 2;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    background: var(--overlay-gradient);
}

.player-info {
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--player-text-color);
    text-shadow: var(--player-text-shadow);
    text-align: center;
    padding: 3rem 1.5rem 1.5rem;
}

.player-controls {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1.5rem;
    background-color: transparent;
}

.btn-control {
    background: transparent;
    border: none;
    color: var(--text-color);
    font-size: 1.5rem;
    margin: 0 1rem;
}

.player-card .btn-control, .player-card .btn-control-sm {
    color: var(--player-text-color);
}

.volume-control {
    display: flex;
    align-items: center;
    width: 150px;
}

.btn-control-sm {
    background: transparent;
    border: none;
    color: var(--text-color);
}

/* --- RESPONSIVE DESIGN --- */
@media (max-width: 768px) {
    .main-container {
        flex-direction: column;
    }
    .sidebar {
        width: 100%;
        height: 45vh;
        border-left: none;
        border-bottom: 1px solid var(--border-color);
    }
    .player-area {
        height: 55vh;
        padding: 1rem;
    }
}

/* --- CUSTOM SCROLLBAR (for WebKit browsers) --- */
.station-list-container::-webkit-scrollbar {
    width: 8px;
}

.station-list-container::-webkit-scrollbar-track {
    background: transparent; /* Make track invisible */
}

.station-list-container::-webkit-scrollbar-thumb {
    background-color: var(--fav-btn-color); /* Use a subtle, theme-based color */
    border-radius: 10px;
    border: 2px solid var(--card-bg); /* Create padding around thumb */
}

/* --- VISUALIZER TOGGLE BUTTON --- */
.btn-viz-toggle {
    position: absolute;
    top: 10px;
    right: 15px;
    color: var(--player-text-color);
    background-color: rgba(0,0,0,0.2);
    opacity: 0.6;
    border: 1px solid rgba(255,255,255,0.2);
    border-radius: 5px;
    padding: 5px 10px;
    z-index: 3;
    transition: opacity 0.2s ease;
}
.btn-viz-toggle:hover {
    opacity: 1;
}

/* --- LOADER --- */
.loader-container {
    display: flex;
    justify-content: center;
    padding: 3rem 0;
}