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

html,
body {
  height: 100%;
  font-family: "Arvo", sans-serif;
  font-display: swap;
  overflow: hidden;
}

#topbar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 10px;
  border-bottom: 1px solid black;
  background: white;
  height: 48px;
}

#topbar button {
  font-family: "Arvo", sans-serif;
  font-display: swap;
  font-size: 1.1em;
  background: none;
  border: 1px solid black;
  cursor: pointer;
  min-width: 44px;
  min-height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
}

#topbar button:hover {
  color: #43b3ae;
  border-color: #43b3ae;
}

#topbar button:disabled {
  color: #ccc;
  border-color: #ccc;
  cursor: default;
}

#current-title {
  flex: 1;
  text-align: center;
  font-size: 0.95em;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

#language-select {
  font-family: "Arvo", sans-serif;
  font-display: swap;
  font-size: 0.85em;
  padding: 4px 6px;
  border: 1px solid black;
  min-height: 44px;
}

#sidebar {
  position: fixed;
  top: 48px;
  left: 0;
  bottom: 0;
  width: 280px;
  border-right: 1px solid black;
  background: white;
  overflow-y: auto;
  transition: transform 0.2s ease;
  z-index: 10;
}

#sidebar.collapsed {
  transform: translateX(-280px);
}

#song-list {
  list-style: none;
}

#song-list li {
  padding: 14px 16px;
  border-bottom: 1px solid #ddd;
  cursor: pointer;
  font-size: 0.85em;
}

#song-list li:hover {
  color: #43b3ae;
}

#song-list li.active {
  background: #e0faf9;
  font-weight: bold;
}

#viewer {
  position: fixed;
  top: 48px;
  left: 0;
  right: 0;
  bottom: 0;
  overflow-y: auto;
  background: #f0f0f0;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 8px;
}

#viewer canvas {
  display: block;
  max-width: 100%;
}

.download-link {
  display: inline-block;
  margin: 16px 0 24px;
  padding: 10px 20px;
  font-family: "Arvo", sans-serif;
  font-size: 0.85em;
  color: black;
  border: 1px solid black;
  text-decoration: none;
}

.download-link:hover {
  color: #43b3ae;
  border-color: #43b3ae;
}