body {
  font-family: Arial, sans-serif;
  background-color: #fff;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  overflow-x: hidden; /* ✅ Ngăn scroll ngang */
}

header {
  position: sticky;
  top: 0;
  z-index: 5;
  background-color: #000000ba;
  color: white;
  padding: 15px 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap; /* ✅ Đảm bảo không bị tràn */
}

.menu {
  display: flex;
  gap: 20px;
  flex-wrap: wrap; /* ✅ Ngăn menu tràn ngang */
}

.menu-link {
  color: white;
  text-decoration: none;
  padding: 8px 16px;
  border-radius: 20px;
  transition: 0.3s;
}

.menu-link:hover {
  background-color: white;
  color: black;
}

main {
  flex: 1;
  padding: 30px;
  box-sizing: border-box; /* ✅ Đảm bảo padding không làm tràn layout */
}

.album {
  margin-bottom: 40px;
}

.album h2 {
  margin-bottom: 10px;
  color: #333;
  border-bottom: 2px solid #ddd;
}

.songs {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
}

.song {
  background-color: #f9f9f9;
  padding: 10px;
  width: 200px;
  border-radius: 10px;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.1);
  text-align: center;
  transition: transform 0.3s;
  box-sizing: border-box;
}

.song:hover {
  transform: scale(1.05);
}

.song img {
  width: 100%;
  border-radius: 10px;
}

.song p {
  margin: 10px 0 5px;
  font-weight: bold;
}

.song a {
  text-decoration: none;
  color: #2196f3;
  font-weight: bold;
}

footer {
  background-color: #000000ba;
  color: white;
  padding: 15px;
  text-align: center;
  box-sizing: border-box;
}

.logout-btn {
  display: inline-block;
  padding: 6px 12px;
  background-color: #ff4d4d;
  color: white;
  text-decoration: none;
  border-radius: 6px;
  font-weight: bold;
  transition: background-color 0.3s ease;
  margin-left: 10px;
}

.logout-btn:hover {
  background-color: #e60000;
}

/* ---------- MOBILE ---------- */
@media only screen and (max-width: 600px) {
  header {
    position: static !important;
    flex-direction: column;
    align-items: flex-start;
    padding: 10px 15px;
    gap: 10px;
  }

  .menu {
    flex-direction: column;
    gap: 12px;
    width: 100%;
  }

  .menu-link {
    display: block;
    padding: 10px 15px;
    font-size: 1em;
  }

  main {
    padding: 20px 10px;
  }

  .songs {
    flex-direction: column;
    gap: 15px;
  }

  .song {
    width: 100%;
    max-width: 100%;
    padding: 15px;
  }

  footer {
    padding: 15px 10px;
    font-size: 0.9em;
  }
}