/* ===== General Layout ===== */
body {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  background: linear-gradient(135deg, #e6f0ff, #fdfbfb);
  font-family: 'Gill Sans', 'Gill Sans MT', Calibri, 'Trebuchet MS', sans-serif;
  margin: 0;
  touch-action: manipulation; /* Prevent double-tap zoom on mobile */
}

/* ===== Wrapper ===== */
.wrapper {
  text-align: center;
  padding: 20px 30px;
  background: white;
  border-radius: 10px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
  max-width: 400px;
  width: 90%;
}

/* ===== Clef Buttons ===== */
#clefs {
  display: flex;
  justify-content: space-around;
  margin-bottom: 20px;
  font-weight: 600;
  gap: 6px;
}

#clefs > * {
  background-color: #f73e05;
  color: white;
  border-radius: 5px;
  height: 35px;
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background 0.2s, transform 0.1s;
  user-select: none;
}

#clefs > *:hover,
#clefs > *:active {
  background-color: #ff6b3d;
  transform: scale(1.05);
}

/* ===== Note Buttons (A–G) ===== */
#selectNotes {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 3px;
  gap: 5px;
}

.selectNotes {
  height: 40px;
  width: 40px;
  background-color: royalblue;
  color: white;
  border-radius: 4px;
  display: flex;
  justify-content: center;
  align-items: center;
  cursor: pointer;
  font-weight: bold;
  transition: background 0.2s, transform 0.1s;
  user-select: none;
}

.selectNotes:hover,
.selectNotes:active {
  background-color: #3a7dff;
  transform: translateY(-2px);
}

/* ===== Image and Cover ===== */
#pngs {
  margin: 20px 0;
  opacity: 1;
  transform: scale(1);
  transition: opacity 0.4s ease, transform 0.4s ease;
  max-width: 100%;
  height: auto;
}

#cover {
  width: 220px;
  z-index: 999;
  background-color: white;
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  border-radius: 6px;
  height: 136px;
  display: none;
}

/* ===== Input Field ===== */
#write {
  padding: 5px 14px;
  font-size: 18px;
  font-weight: 500;
  border-radius: 8px;
  border: 2px solid #ccd8ff;
  outline: none;
  width: 140px;
  text-align: center;
  transition: all 0.25s ease;
  background: #f8faff;
  color: #333;
  box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.05);
}

#write:focus {
  border-color: royalblue;
  background: #fff;
  box-shadow: 0 0 8px rgba(65, 105, 225, 0.3);
  transform: scale(1.05);
}

#write::placeholder {
  color: #aaa;
  font-style: italic;
}

/* ===== Text Styling ===== */
.head {
  font-size: 26px;
  font-weight: 700;
  color: #2c3e50;
  margin-bottom: 10px;
  text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.1);
  letter-spacing: 0.5px;
}

.info {
  color: #555;
  font-size: 15px;
  font-weight: 500;
  margin: 10px 0 0;
  letter-spacing: 0.3px;
  opacity: 0.9;
}

/* ===== Answer Feedback ===== */
#answer {
  font-size: 22px;
  font-weight: 700;
  margin-top: 12px;
  min-height: 28px;
  transition: all 0.3s ease;
}

.correct {
  color: #2ecc71;
  text-shadow: 0 0 5px rgba(46, 204, 113, 0.4);
  animation: pop 0.25s ease;
}

.wrong {
  color: #e74c3c;
  text-shadow: 0 0 5px rgba(231, 76, 60, 0.4);
  animation: pop 0.25s ease;
}

/* Small pop animation for feedback */
@keyframes pop {
  0% { transform: scale(0.8); opacity: 0.5; }
  100% { transform: scale(1); opacity: 1; }
}

/* ===== Responsive ===== */
@media (max-width: 480px) {
  .head { font-size: 22px; }
  #clefs > * { height: 32px; font-size: 14px; }
  .selectNotes { height: 38px; width: 38px; font-size: 16px; }
  #write { width: 120px; font-size: 16px; }
}