:root {
    --primary-color: #1DB954;
    --background-dark: #121212;
    --background-light: #282828;
    --text-primary: #FFFFFF;
    --text-secondary: #B3B3B3;
    --sidebar-width: 240px;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    background-color: var(--background-dark);
    color: var(--text-primary);
}

.app-container {
    display: grid;
    grid-template-areas:
        "sidebar main"
        "player player";
    grid-template-columns: var(--sidebar-width) 1fr;
    grid-template-rows: 1fr auto;
    height: 100vh;
}

/* Sidebar Styles */
.sidebar {
    grid-area: sidebar;
    background-color: #000000;
    padding: 24px 16px;
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.logo h1 {
    color: var(--primary-color);
    font-size: 24px;
    margin-bottom: 24px;
}

.nav-links, .playlists {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.nav-links a, .playlists a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 16px;
    transition: color 0.3s ease;
}

.nav-links a:hover, .playlists a:hover {
    color: var(--text-primary);
}

.nav-links a.active {
    color: var(--text-primary);
}

.playlists h3 {
    color: var(--text-secondary);
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 8px;
}

/* Main Content Styles */
.main-content {
    grid-area: main;
    background: linear-gradient(to bottom, #404040, var(--background-dark));
    padding: 24px;
    overflow-y: auto;
}

.top-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 32px;
}

.search-bar {
    background-color: var(--background-light);
    border-radius: 20px;
    padding: 8px 16px;
    display: flex;
    align-items: center;
    gap: 8px;
    width: 300px;
}

.search-bar input {
    background: none;
    border: none;
    color: var(--text-primary);
    width: 100%;
    outline: none;
}

.user-profile {
    display: flex;
    align-items: center;
    gap: 8px;
    background-color: var(--background-light);
    padding: 4px 8px;
    border-radius: 20px;
}

.user-profile img {
    width: 28px;
    height: 28px;
    border-radius: 50%;
}

/* Player Styles */
.player {
    grid-area: player;
    background-color: var(--background-light);
    padding: 16px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-top: 1px solid #282828;
}

.now-playing {
    display: flex;
    align-items: center;
    gap: 12px;
    width: 30%;
}

.now-playing img {
    width: 56px;
    height: 56px;
    border-radius: 4px;
}

.track-info {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.track-info span:first-child {
    color: var(--text-primary);
    font-size: 14px;
}

.track-info span:last-child {
    color: var(--text-secondary);
    font-size: 12px;
}

.player-controls {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    width: 40%;
}

.control-buttons {
    display: flex;
    align-items: center;
    gap: 16px;
}

.control-buttons button {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 16px;
    transition: color 0.3s ease;
}

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

#play-pause {
    font-size: 32px;
    color: var(--text-primary);
}

.progress-bar {
    width: 100%;
    display: flex;
    align-items: center;
    gap: 8px;
}

.progress {
    flex-grow: 1;
    height: 4px;
    background-color: #4f4f4f;
    border-radius: 2px;
    cursor: pointer;
    position: relative;
}

.progress-filled {
    background-color: var(--primary-color);
    height: 100%;
    border-radius: 2px;
    width: 30%;
}

.volume-control {
    display: flex;
    align-items: center;
    gap: 8px;
    width: 30%;
    justify-content: flex-end;
}

.volume-control input[type="range"] {
    width: 100px;
    accent-color: var(--primary-color);
}

/* Welcome Section */
.welcome-section {
    text-align: center;
    padding: 48px 0;
}

.welcome-section h1 {
    font-size: 48px;
    margin-bottom: 16px;
}

.welcome-section p {
    color: var(--text-secondary);
    font-size: 18px;
}

/* Featured Playlists */
.featured-playlists {
    margin-top: 32px;
}

.featured-playlists h2 {
    margin-bottom: 24px;
}

.playlist-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 24px;
}

/* Responsive Design */
@media (max-width: 768px) {
    .app-container {
        grid-template-areas:
            "main main"
            "player player";
    }

    .sidebar {
        display: none;
    }

    .main-content {
        padding: 16px;
    }

    .search-bar {
        width: 200px;
    }

    .player {
        flex-direction: column;
        gap: 16px;
    }

    .now-playing, .player-controls, .volume-control {
        width: 100%;
    }
}