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

body {
  font-family: 'Open Sans', sans-serif;
  background: black;
  color: #eee;
  line-height: 1.6;
}

header {
  background: #1f1f1f;
  padding: 15px 50px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 10;
}

.showcase-title {
  text-align: center;
  font-size: 20px;
  font-weight: 800;
  color: #4caf50; 
  letter-spacing: 4px;
  margin: 40px 0 30px;
  text-transform: uppercase;
  font-family: 'Open Sans', sans-serif;
  padding-bottom: 10px;
}

.showcase-title::after {
  content: '';
  display: block;
  width: 60px;
  height: 4px;
  background: #4caf50;
  margin: 8px auto 0;
  border-radius: 2px;
  box-shadow: 0 0 8px #4caf50aa;
}

.showcase-subtitle {
  text-align: center;
  color: #a5d6a7; 
  font-size: 1rem;
  font-weight: 600;
  font-family: 'Open Sans', sans-serif;
  margin-top: -10px; 
  margin-bottom: 30px;
  letter-spacing: 1px;
  font-style: italic;
}
.logo-section {
  display: flex;
  align-items: center;
  text-decoration: none;
  color: #4caf50; 
}

.logo-section img.logo {
  height: 50px;
  margin-right: 12px;
}

.showcase {
  max-width: 900px;
  margin: 40px auto 80px auto;
  display: flex;
  flex-direction: column;
  gap: 25px;
  padding: 0 20px;
  color: lightgray; 
  font-size: 15px;
  font-weight: 300;
  font-family: 'Open Sans', sans-serif;
  letter-spacing: 1px;
}

.song-container {
  background: #222; 
  display: flex;
  align-items: center;
  padding: 15px 20px;
  border-radius: 10px;
  cursor: pointer;
  box-shadow: 0 0 8px rgba(0,0,0,0.7);
  transition: background 0.3s ease;
}

.song-container:not(.playing):hover {
  background: #333; 
}

.song-container.playing {
  background: #333 !important; 
}

.play-button {
  height: 50px;
  width: 50px;
  flex-shrink: 0;
  margin-right: 20px;
  color:black;
  transition: filter 0.3s ease;
}

.song-container.playing .play-button {
  filter: brightness(0.8) saturate(0%) contrast(120%); 
}

.sound-wave {
  height: 80px; 
  width: 600px;  
  opacity: 0.8;
}


.logo-section h1 {
  font-weight: 700;
  letter-spacing: 3px;
  font-size: 1.6rem;
}

nav ul.nav-links {
  list-style: none;
  display: flex;
  gap: 25px;
}

nav ul.nav-links li a {
  color: #eee;
  text-decoration: none;
  font-weight: 600;
  font-size: 1rem;
  transition: color 0.3s ease;
}

nav ul.nav-links li a:hover,
nav ul.nav-links li a:focus {
  color: #4caf50;
  outline: none;
}


footer {
  background: #1f1f1f;
  color: #777;
  text-align: center;
  padding: 20px 10px;
  font-size: 0.9rem;
  letter-spacing: 1px;
  border-top: 1px solid #333;
}

@media (max-width: 600px) {
  nav ul.nav-links {
    flex-direction: column;
    gap: 15px;
  }
  
  section.hero {
    margin: -100px 20px 40px 20px;
    font-size: 1.1rem;
    padding: 25px 20px;
  }
}