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

body {
  background: linear-gradient(45deg, rgb(173, 167, 167), rgb(224, 194, 194), rgb(134, 133, 133));
  min-height: 100vh;
  font-family: Arial, sans-serif;
}

h1 {
  text-align: center;
  margin-top: 30px;
  color: rgb(3, 3, 3);
  text-transform: uppercase;
  font-family: cursive;
  font-size: 2.5rem;
}

.wrapper {
  margin-top: 40px;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 10px;
  overflow-x: auto;
}

.piano {
  display: flex;
  position: relative;
}

.key {
  position: relative;
  transition: background-color 0.3s ease, transform 0.1s ease;
}

.white {
  width: 60px;
  height: 240px;
  background: linear-gradient(to bottom, #fff, #f3f3f3);
  border: 1px solid #333;
  border-radius: 0 0 10px 10px;
  z-index: 1;
}

.white:active {
  background-color: #ccc;
}

.black {
  width: 40px;
  height: 160px;
  background: linear-gradient(to bottom, #000, #333);
  margin-left: -20px;
  margin-right: -20px;
  z-index: 2;
  border: 1px solid #111;
  border-radius: 0 0 8px 8px;
  color: #fff;
}

.black:active {
  background-color: #222;
}

.note-label {
  font-size: 12px;
  position: absolute;
  bottom: 4px;
  left: 50%;
  transform: translateX(-50%);
  color: inherit;
}

.key.active {
  transform: translateY(4px);
}

.controls {
  display: flex;
  justify-content: center;
  margin: 30px 10px 10px;
}

button {
  padding: 12px 25px;
  background: linear-gradient(to right, #4b4b4b, #888);
  color: #fff;
  border: none;
  border-radius: 8px;
  font-size: 16px;
  font-family: sans-serif;
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: 2px 2px 8px rgba(0,0,0,0.2);
}

button:hover {
  background: linear-gradient(to right, #5e5e5e, #a0a0a0);
  transform: scale(1.05);
}

/* 📱 Responsive Design */
@media (max-width: 768px) {
  .white {
    width: 40px;
    height: 180px;
  }

  .black {
    width: 25px;
    height: 120px;
    margin-left: -12.5px;
    margin-right: -12.5px;
  }

  h1 {
    font-size: 2rem;
  }

  button {
    font-size: 14px;
    padding: 10px 20px;
  }
}

@media (max-width: 480px) {
  .white {
    width: 30px;
    height: 140px;
  }

  .black {
    width: 20px;
    height: 90px;
    margin-left: -10px;
    margin-right: -10px;
  }

  h1 {
    font-size: 1.6rem;
  }

  button {
    font-size: 13px;
    padding: 8px 16px;
  }
}