:root {
  --primary: #667eea;
  --secondary: #764ba2;
  --light: #f7f7ff;
  --dark: #222;
}

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

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.container {
  background: white;
  border-radius: 20px;
  padding: 40px;
  max-width: 600px;
  width: 100%;
  box-shadow: 0 20px 60px rgba(0,0,0,0.3);
}

.header {
  text-align: center;
  margin-bottom: 30px;
}

.header h1 {
  font-size: 2.5em;
  color: var(--dark);
  margin-bottom: 10px;
}

.header p {
  color: #666;
  font-size: 1em;
}

.mood-selector {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 15px;
  margin-bottom: 30px;
}

.mood-btn {
  padding: 15px;
  border: 2px solid #ddd;
  border-radius: 10px;
  background: white;
  cursor: pointer;
  font-size: 1em;
  transition: all 0.3s;
}

.mood-btn:hover {
  border-color: var(--primary);
  transform: translateY(-2px);
}

.mood-btn.active {
  background: var(--primary);
  color: white;
  border-color: var(--primary);
}

.player {
  margin-bottom: 30px;
}

.visualizer {
  background: #f0f0f0;
  border-radius: 15px;
  padding: 20px;
  margin-bottom: 20px;
  min-height: 200px;
}

#visualizer {
  width: 100%;
  height: 200px;
  display: block;
}

.controls {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  align-items: center;
}

.control-btn {
  padding: 10px 20px;
  background: var(--primary);
  color: white;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  font-size: 1em;
  transition: all 0.3s;
}

.control-btn:hover {
  background: var(--secondary);
  transform: scale(1.05);
}

.volume-control {
  display: flex;
  align-items: center;
  gap: 10px;
}

.volume-control input {
  width: 150px;
  cursor: pointer;
}

.playlist {
  padding: 20px;
  background: #f9f9f9;
  border-radius: 10px;
}

.playlist h2 {
  font-size: 1.2em;
  margin-bottom: 10px;
  color: var(--dark);
}

#nowPlaying {
  color: #666;
  padding: 10px;
  text-align: center;
}