* {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

html,
body {
  width: 100%;
  height: 100%;
  margin: 0;
  overflow: hidden;
  background: #121212;
  color: #fff;
  font-family: Arial, Helvetica, sans-serif;
}

button,
input {
  font: inherit;
}

#app {
  position: relative;
  width: 100vw;
  height: 100vh;
  min-width: 320px;
  min-height: 240px;
  overflow: hidden;
  background: #121212;
}

#displayCanvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  background: #121212;
}

.file-controls {
  position: absolute;
  z-index: 3;
  top: 12px;
  left: 12px;
  right: 12px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
}

.file-control,
.operation-button,
.formula-panel {
  border: 1px solid rgba(255, 255, 255, 0.88);
  border-radius: 5px;
  background: rgba(35, 35, 35, 0.82);
  color: #fff;
  backdrop-filter: blur(3px);
}

.file-control {
  min-width: 0;
  height: 42px;
  padding: 0 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  cursor: pointer;
  font-size: 12px;
  white-space: nowrap;
  overflow: hidden;
  transition: background-color 100ms ease;
}

.file-control:hover,
.file-control:focus-within,
.operation-button:not(:disabled):hover,
.operation-button:not(:disabled):focus-visible {
  background: rgba(100, 100, 100, 0.9);
  outline: none;
}

.file-label {
  flex: 0 0 auto;
}

.file-name {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
}

.file-control input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.right-panel {
  position: absolute;
  z-index: 3;
  top: 70px;
  right: 15px;
  width: 240px;
  max-height: calc(100vh - 85px);
  overflow-y: auto;
  scrollbar-width: thin;
}

.operation-buttons {
  display: grid;
  gap: 8px;
}

.operation-button {
  width: 100%;
  height: 40px;
  padding: 0 10px;
  cursor: pointer;
  font-size: 12px;
  transition: background-color 100ms ease;
}

.operation-button.selected {
  background: rgba(40, 140, 230, 0.9);
}

.operation-button:disabled {
  border-color: rgba(130, 130, 130, 0.59);
  background: rgba(25, 25, 25, 0.58);
  color: #919191;
  cursor: not-allowed;
}

.formula-panel {
  margin-top: 16px;
  padding: 12px;
}

.formula-panel h2 {
  margin: 0 0 10px;
  font-size: 13px;
  line-height: 1.3;
}

.formula-panel pre {
  margin: 0;
  color: #f2f2f2;
  font-family: Consolas, "Courier New", monospace;
  font-size: 11px;
  line-height: 1.45;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.empty-message {
  position: absolute;
  z-index: 2;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 24px 280px 24px 24px;
  text-align: center;
  pointer-events: none;
}

.empty-message strong {
  font-size: clamp(22px, 3vw, 30px);
  font-weight: 600;
}

.empty-message span {
  margin-top: 14px;
  font-size: clamp(13px, 1.6vw, 16px);
}


.sound-controls {
  position: absolute;
  z-index: 4;
  left: 12px;
  bottom: 12px;
  display: flex;
  align-items: flex-end;
  gap: 8px;
}
.frequency-control,
.sound-button {
  border: 1px solid rgba(255, 255, 255, 0.88);
  border-radius: 5px;
  background: rgba(35, 35, 35, 0.82);
  color: #fff;
  backdrop-filter: blur(3px);
}
.frequency-control {
  min-width: 118px;
  padding: 7px 9px;
  display: grid;
  gap: 4px;
  font-size: 11px;
}
.frequency-control select {
  width: 100%;
  border: 1px solid rgba(255, 255, 255, 0.45);
  border-radius: 3px;
  padding: 4px 6px;
  background: #252525;
  color: #fff;
  font: inherit;
}
.sound-button {
  height: 48px;
  padding: 0 16px;
  cursor: pointer;
  font-size: 12px;
}
.sound-button:hover,
.sound-button:focus-visible {
  background: rgba(100, 100, 100, 0.9);
  outline: none;
}
.sound-button.playing {
  background: rgba(40, 140, 230, 0.9);
}


.sound-formula-panel {
  min-width: 360px;
  min-height: 48px;
  max-width: min(520px, calc(100vw - 620px));
  padding: 7px 11px;
  border: 1px solid rgba(255, 255, 255, 0.88);
  border-radius: 5px;
  background: rgba(35, 35, 35, 0.82);
  color: #fff;
  backdrop-filter: blur(3px);
  display: flex;
  align-items: center;
  font-family: Consolas, "Courier New", monospace;
  font-size: 11px;
  line-height: 1.35;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.busy-indicator {
  position: absolute;
  z-index: 5;
  left: 16px;
  bottom: 86px;
  padding: 10px 14px;
  border: 1px solid rgba(255, 255, 255, 0.75);
  border-radius: 5px;
  background: rgba(18, 18, 18, 0.9);
  font-size: 12px;
}

@media (max-width: 800px) {
  .sound-formula-panel {
    min-width: 300px;
    max-width: none;
    flex: 0 0 auto;
  }

  .sound-controls {
    right: 12px;
    bottom: 12px;
    overflow-x: auto;
    align-items: flex-end;
  }
  .frequency-control {
    min-width: 104px;
  }
  .sound-button {
    flex: 0 0 auto;
  }
  .file-controls {
    grid-template-columns: 1fr;
  }

  .file-control {
    height: 38px;
  }

  .right-panel {
    top: 146px;
    right: 12px;
    width: min(240px, calc(100vw - 24px));
    max-height: calc(100vh - 158px);
  }

  .operation-button {
    height: 36px;
  }

  .empty-message {
    padding: 150px 24px 24px;
  }
}


.sonification-controls { 
  position:absolute; 
  z-index:4; 
  top:70px; 
  left:12px; 
  width:190px; 
  display:grid; 
  gap:7px; 
}

.sonification-button,.sonification-status { 
  border:1px solid rgba(255,255,255,.88); 
  border-radius:5px; 
  background:rgba(35,35,35,.82); 
  color:#fff; 
  backdrop-filter:blur(3px); 
}

.sonification-button { 
  height:42px; 
  padding:0 14px; 
  cursor:pointer; 
  font-size:12px; 
}

.sonification-button:hover,.sonification-button:focus-visible { 
  background:rgba(100,100,100,.9); o
  utline:none; 
}

.sonification-button.playing { 
  background:rgba(40,140,230,.9); 
}

.sonification-status {
  padding: 7px 9px;
  font-size: 11px;
  line-height: 1.35;
  white-space: pre-line;
}
@media (max-width:800px) { 
  .sonification-controls { 
    top:146px; width:170px; 
  } 
}