/* Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
  }
  
  body {
    background-color: #121212;
    color: #ffffff;
    min-height: 100vh;
    line-height: 1.4;
  }
  
  /* Main App Container */
  #app {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
    position: relative;
    z-index: 1;
  }
  
  /* Playlist Header */
  #playlist-header {
    display: flex;
    gap: 20px;
    margin-bottom: 2rem;
    align-items: center;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid #2a2a2a;
    flex-wrap: wrap; /* Allow wrapping on narrow screens */
  }
  
  #playlist-image {
    width: 200px;
    height: 200px;
    object-fit: cover;
    border-radius: 8px;
    flex-shrink: 0;
  }
  
  #playlist-info {
    flex: 1;
    min-width: 0;
  }
  
  #playlist-name {
    font-size: 2rem;
    margin-bottom: 0.5rem;
  }
  
  #playlist-owner,
  #playlist-stats,
  #playlist-description {
    font-size: 1rem;
    color: #b3b3b3;
    margin-bottom: 0.5rem;
  }
  
  /* Tracks Container */
  #tracks-container {
    margin-top: 2rem;
  }
  
  #tracks-container h2 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    border-bottom: 1px solid #2a2a2a;
    padding-bottom: 0.5rem;
  }
  
  /* Tracks List */
  #tracks-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
  }
  
  /* Individual Track Styling */
  .track {
    display: flex;
    align-items: center;
    padding: 1rem;
    background: #181818;
    border-radius: 8px;
    transition: background 0.3s ease;
    flex-wrap: wrap;
  }
  
  .track:hover {
    background: #2a2a2a;
  }
  
  .track-number {
    width: 30px;
    font-size: 1rem;
    font-weight: 500;
    text-align: center;
    margin-right: 1rem;
    flex-shrink: 0;
  }
  
  .track-info {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
    align-items: flex-start; /* default left alignment */
  }
  
  .track-name {
    font-size: 1rem;
    font-weight: bold;
    word-wrap: break-word;
  }
  
  .track-artist {
    font-size: 0.9rem;
    color: #b3b3b3;
  }
  
  .track-album {
    max-width: 200px;
    font-size: 0.9rem;
    color: #b3b3b3;
    margin-left: 1rem;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    text-align: right;
  }
  
  .track-duration {
    width: 60px;
    text-align: right;
    font-size: 0.9rem;
    color: #b3b3b3;
    margin-left: 1rem;
    flex-shrink: 0;
  }
  
  /* Loading and Error States */
  .loading,
  .error {
    width: 100%;
    text-align: center;
    font-size: 1rem;
    padding: 1rem;
  }
  
  .error {
    color: #c0392b;
  }
  
  /* Utility Classes */
  .hidden {
    display: none !important;
  }
  
  /* Unified Download Button Base Style */
  .download-btn {
    background-color: #1db954;
    color: #fff;
    border: none;
    border-radius: 4px;
    padding: 0.5rem 1rem;
    font-size: 0.95rem;
    cursor: pointer;
    transition: background-color 0.2s ease, transform 0.2s ease;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin: 0.5rem;
  }
  
  .download-btn:hover {
    background-color: #17a44b;
  }
  
  .download-btn:active {
    transform: scale(0.98);
  }
  
  /* Circular Variant for Compact Areas (e.g., in a queue list) */
  .download-btn--circle {
    width: 32px;
    height: 32px;
    padding: 0;
    border-radius: 50%;
    font-size: 0;
  }
  
  .download-btn--circle::before {
    content: "↓";
    font-size: 16px;
    color: #fff;
    display: inline-block;
  }
  
  /* Icon next to text */
  .download-btn .btn-icon {
    margin-right: 0.5rem;
    display: inline-flex;
    align-items: center;
  }
  
  /* Back Button Styling */
  .back-btn {
    background-color: #333;
    color: #fff;
    border: none;
    border-radius: 4px;
    padding: 0.5rem 1rem;
    font-size: 0.95rem;
    cursor: pointer;
    transition: background-color 0.2s ease, transform 0.2s ease;
    margin-right: 1rem;
  }
  
  .back-btn:hover {
    background-color: #444;
  }
  
  .back-btn:active {
    transform: scale(0.98);
  }
  
  /* Download Queue Toggle Button */
  .queue-toggle {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: #1db954;
    color: #fff;
    border: none;
    border-radius: 50%;
    width: 56px;
    height: 56px;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: bold;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
    transition: background-color 0.3s ease, transform 0.2s ease;
    z-index: 1002;
  }
  
  .queue-toggle:hover {
    background: #1ed760;
    transform: scale(1.05);
  }
  
  .queue-toggle:active {
    transform: scale(1);
  }
  
  /* Responsive Styles */
  
  /* Medium Devices (Tablets) */
  @media (max-width: 768px) {
    #playlist-header {
      flex-direction: column;
      align-items: flex-start;
    }
    
    #playlist-image {
      width: 100%;
      height: auto;
      margin-bottom: 1rem;
    }
    
    .track {
      flex-direction: column;
      align-items: flex-start;
    }
    
    .track-album,
    .track-duration {
      margin-left: 0;
      margin-top: 0.5rem;
      width: 100%;
      text-align: left;
    }
  }
  
  /* Small Devices (Mobile Phones) */
  @media (max-width: 480px) {
    #app {
      padding: 10px;
    }
    
    #playlist-name {
      font-size: 1.5rem;
    }
    
    /* Adjust track layout to vertical & centered */
    .track {
      padding: 0.8rem;
      flex-direction: column;
      align-items: center;
      text-align: center;
    }
    
    .track-number {
      font-size: 0.9rem;
      margin-right: 0;
      margin-bottom: 0.5rem;
    }
    
    .track-info {
      align-items: center;
    }
    
    /* Center the album and duration info */
    .track-album,
    .track-duration {
      margin-left: 0;
      margin-top: 0.5rem;
      width: 100%;
      text-align: center;
    }
    
  }