body {
  font-family: sans-serif;
  padding: 20px;
  background: #f9f9f9;
}
h1 {
  text-align: center;
}
#filters {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 20px;
  justify-content: center;
}
#filters select, #filters button {
  padding: 8px;
  min-width: 120px;
}
#alphabet-jump {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 6px;
  margin: 10px 0;
}
#alphabet-jump button {
  padding: 6px 10px;
}
#song-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
}
.song-button {
  padding: 12px;
  background: #eee;
  border: 1px solid #ccc;
  cursor: pointer;
}
.song-button.recently-logged {
  background: #bbb;
}
#pdf-modal {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.8);
  justify-content: center;
  align-items: center;
  z-index: 999;
}
#pdf-viewer {
  width: 90%;
  height: 90%;
  background: white;
  padding: 10px;
  display: flex;
  flex-direction: column;
}
#pdf-frame {
  width: 100%;
  height: 85%;
}
.pdf-buttons {
  display: flex;
  justify-content: space-around;
  margin-top: 10px;
  flex-wrap: wrap;
}
.pdf-buttons button {
  margin: 5px;
  padding: 8px 12px;
}