:root {
  --primary-color: #1aff6a; /* Spotify-like Green */
  --secondary-color: #121212;
  --accent-color: #1e1e1e;
  --text-color: #ffffff;
  --muted-text: #aaaaaa;
  --border-radius: 14px;
  --transition: 0.3s ease-in-out;
  --shadow: 0 8px 20px rgba(0, 0, 0, 0.5);
}

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

body {
  background: var(--secondary-color);
  color: var(--text-color);
  display: flex;
  flex-direction: column;
  align-items: center;
  min-height: 100vh;
}

/*  Header */
header {
  width: 100%;
  padding: 20px;
  text-align: center;
  background: var(--accent-color);
  box-shadow: var(--shadow);
}

header .logo {
  font-size: 1.8rem;
  font-weight: bold;
  color: var(--primary-color);
}

/*  Player Container */
.player-container {
  background: var(--accent-color);
  padding: 25px;
  margin-top: 30px;
  width: 780px;
  border-radius: var(--border-radius);
  text-align: center;
  box-shadow: var(--shadow);
  transition: transform var(--transition);
}

.player-container:hover {
  transform: translateY(-4px);
}

/* Song Info */
.song-info img {
  width: 100%;
  max-width: 300px;
  border-radius: var(--border-radius);
  margin-bottom: 15px;
  box-shadow: var(--shadow);
}

.song-info h2 {
  font-size: 1.4rem;
  margin-top: 10px;
}

.song-info p {
  color: var(--muted-text);
  font-size: 1rem;
}

/*  Controls */
.controls {
  display: flex;
  justify-content: center;
  gap: 15px;
  margin: 15px 0;
}

.controls button {
  background: linear-gradient(135deg, #1db954, #17a74a);
  border: none;
  color: white;
  font-size: 22px;
  padding: 10px;
  border-radius: 10px;
  cursor: pointer;
  box-shadow: 0 4px 10px rgba(29, 185, 84, 0.4);
  transition: transform 0.2s ease, box-shadow 0.3s ease;
}

.controls button:hover {
  transform: scale(1.15);
  box-shadow: 0 6px 14px rgba(29, 185, 84, 0.6);
}

.controls button:active {
  transform: scale(0.95);
}
/*  Progress Bar */
#progress, #volume {
  width: 100%;
  margin: 8px 0;
  cursor: pointer;
  accent-color: var(--primary-color);
}

/*  Playlist */
.playlist {
  margin-top: 20px;
  text-align: left;
}

.playlist h3 {
  margin-bottom: 10px;
  font-size: 1.2rem;
  color: var(--primary-color);
}

.playlist ul {
  list-style: none;
  max-height: 150px;
  overflow-y: auto;
  padding-right: 5px;
}

.playlist ul::-webkit-scrollbar {
  width: 6px;
}

.playlist ul::-webkit-scrollbar-thumb {
  background: var(--primary-color);
  border-radius: 4px;
}

.playlist li {
  padding: 8px;
  background: #2a2a2a;
  margin-bottom: 6px;
  border-radius: 6px;
  cursor: pointer;
  transition: background var(--transition);
}

.playlist li:hover {
  background: #3a3a3a;
}

/*  Responsive */
@media (max-width: 450px) {
  .player-container {
    width: 90%;
    padding: 20px;
  }
}