:root {
    --bg-color: #050505;
    --card-bg: #121212;
    --accent-color: #39ff14;
    --text-color: #ffffff;
    --text-muted: #a0a0a0;
    --border-color: #222222;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', sans-serif;
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    overflow-x: hidden;
}

.app-container {
    display: flex;
    height: 100vh;
    width: 100vw;
}

/* Sidebar Desktop */
.sidebar {
    width: 260px;
    background-color: var(--card-bg);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    padding: 20px;
}

.logo-brand h2 {
    color: var(--accent-color);
    font-size: 1.5rem;
    margin-bottom: 5px;
}

.logo-brand span {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.sidebar-nav {
    margin-top: 30px;
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.nav-link {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 1rem;
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px;
    border-radius: 8px;
    transition: 0.3s;
}

.nav-link:hover, .nav-link.active {
    color: var(--accent-color);
    background: rgba(57, 255, 20, 0.1);
}

/* Main Content */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    height: 100vh;
    overflow-y: auto;
    padding-bottom: 120px;
}

.view-section {
    display: none;
    padding: 30px;
}

.view-section.active {
    display: block;
}

/* Search Bar */
.search-bar-container {
    display: flex;
    gap: 10px;
    margin: 20px 0;
}

.search-bar-container input {
    flex: 1;
    padding: 12px 15px;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    color: var(--text-color);
    border-radius: 8px;
    outline: none;
}

.search-bar-container input:focus {
    border-color: var(--accent-color);
}

.search-bar-container button {
    padding: 0 20px;
    background: var(--accent-color);
    color: #000;
    border: none;
    border-radius: 8px;
    font-weight: bold;
    cursor: pointer;
}

/* Grid & Cards */
.grid-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.song-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 15px;
    transition: 0.3s;
}

.song-card:hover {
    border-color: var(--accent-color);
    transform: translateY(-5px);
}

.song-card img {
    width: 100%;
    aspect-ratio: 1;
    object-fit: cover;
    border-radius: 8px;
    margin-bottom: 10px;
}

.song-card h4 {
    font-size: 0.95rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* Mini Player Bottom */
.mini-player {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    background: var(--card-bg);
    border-top: 1px solid var(--border-color);
    padding: 15px 30px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    z-index: 1000;
}

.player-left {
    display: flex;
    align-items: center;
    gap: 15px;
}

.player-left img {
    width: 50px;
    height: 50px;
    border-radius: 6px;
    object-fit: cover;
}

.player-controls {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    flex: 1;
    max-width: 500px;
}

.control-buttons {
    display: flex;
    align-items: center;
    gap: 20px;
}

.control-buttons button {
    background: none;
    border: none;
    color: var(--text-color);
    font-size: 1.1rem;
    cursor: pointer;
    transition: 0.3s;
}

.control-buttons button:hover {
    color: var(--accent-color);
}

.control-buttons #play-pause-btn {
    background: var(--accent-color);
    color: #000;
    width: 38px;
    height: 38px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.progress-container {
    display: flex;
    align-items: center;
    gap: 10px;
    width: 100%;
}

.progress-container input[type="range"] {
    flex: 1;
    accent-color: var(--accent-color);
}

/* States */
.loading-spinner, .empty-state, .error-state {
    text-align: center;
    padding: 40px;
    color: var(--text-muted);
}

.error-state {
    color: #ff4d4d;
}

/* Mobile Responsive */
.bottom-nav {
    display: none;
}

@media (max-width: 768px) {
    .sidebar {
        display: none;
    }
    .bottom-nav {
        display: flex;
        position: fixed;
        bottom: 0;
        left: 0;
        width: 100%;
        background: var(--card-bg);
        border-top: 1px solid var(--border-color);
        justify-content: space-around;
        padding: 12px 0;
        z-index: 999;
    }
    .bottom-nav-item {
        color: var(--text-muted);
        text-decoration: none;
        font-size: 1.2rem;
    }
    .bottom-nav-item.active {
        color: var(--accent-color);
    }
    .main-content {
        padding: 15px;
        padding-bottom: 140px;
    }
    .mini-player {
        bottom: 55px;
        padding: 10px 15px;
    }
}