body {
  background-color: #414231;
  color: #00CC58;
  font-family: 'Courier New', Courier, monospace;
  margin: 0;
  padding: 0;
  min-height: 100vh;
  overflow-x: auto;
}

/* Container for the entire layout */
.app-container {
  display: flex;
  min-height: 100vh;
  flex-direction: row;
  gap: 20px;
  padding: 20px;
  padding-bottom: 180px; /* Space for piano */
  box-sizing: border-box;
  justify-content: center;
  align-items: flex-start;
}

/* Charts container - centered below staff */
#charts-container {
  display: flex;
  flex-direction: row; /* Side by side charts */
  gap: 25px;
  justify-content: center;
  align-items: center;
  width: 100%;
  max-width: 600px;
  margin: 20px 0;
  padding: 20px;
  background-color: rgba(255, 255, 255,0)  ;
  border-radius: 10px;
  
  /* Remove sticky positioning */
  position: static;
  height: auto;
  max-height: none;
  overflow: visible;
}

#charts-container canvas {
  border-radius: 8px;
    width: 300px;  /* Increased from 250px */
    height: 200px
}

.main-content {
  flex: 1;
  max-width: 1000px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  min-width: 0; /* Allow shrinking */
  width: 100%;
  margin: 0 auto;
}

h1 {
  color: #00CC58;
  text-align: center;
  font-weight: bold;
  margin-bottom: 24px;
  user-select: none;
  font-size: clamp(1.5rem, 4vw, 2.5rem);
}

.controls {
  display: flex;
  justify-content: center;
  margin-bottom: 20px;
  flex-wrap: wrap;
  gap: 10px;
}

button {
  background-color: #00CC58;
  border: none;
  border-radius: 8px;
  color: #414231;
  font-weight: bold;
  padding: 14px 28px;
  cursor: pointer;
  font-size: 1rem;
  user-select: none;
  transition: background-color 0.25s ease;
  min-width: 120px;
}

button:hover:not(:disabled) {
  background-color: #00b84e;
}

button:disabled {
  background-color: #555842;
  cursor: not-allowed;
}

#status,
#device-name,
#exercise-info,
#stats {
  text-align: center;
  margin-bottom: 15px;
  user-select: none;
}

#device-name {
  font-style: italic;
  color: #a0dca3;
}

#exercise-info {
  background-color: #3c3c33;
  padding: 10px;
  border-radius: 8px;
  font-weight: 500;
}

#stats {
  font-weight: 700;
  font-size: 1.1rem;
}

#staff {
  background-color: #D9D9D9;
  border-radius: 8px;
  padding: 24px 28px;
  min-height: 280px;
  width: 100%;
  max-width: 780px;
  box-shadow: inset 0 4px 8px rgba(0, 0, 0, 0.4);
  margin: 20px 0;
  box-sizing: border-box;
  display: block;
  align-self: center;
}

#layout {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  gap: 60px;
  width: 100%;
  flex-wrap: wrap;
}


#virtual-piano-wrapper {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  width: 100%;
  overflow-x: auto;
  padding: 10px 0; /* Remove horizontal padding */
  background-color: #2e2f25;
  box-shadow: inset 0 4px 8px rgba(0, 0, 0, 0.4);
  z-index: 1000;
  scroll-behavior: smooth;
}

/* Scroll container that creates the scrollable area */
.piano-scroll-container {
  display: flex;
  align-items: center;
  min-width: 100%;
  width: max-content;
}

/* Spacers to create equal scroll space on both sides */
.piano-spacer-start,
.piano-spacer-end {
  width: 50vw; /* Half of viewport width for equal spacing */
  flex-shrink: 0;
}

#virtual-piano {
  display: flex;
  position: relative;
  flex-wrap: nowrap;
  height: 140px;
  user-select: none;
  /* Remove width: max-content and margin-right */
}
.piano-key {
  width: 40px;
  height: 140px;
  border: 1px solid #000;
  box-sizing: border-box;
  background: #fafafa;
  position: relative;
  z-index: 1;
  cursor: pointer;
  flex: 0 0 40px;
}

.piano-key.black {
  width: 28px;
  height: 90px;
  background: #333;
  position: absolute;
  z-index: 2;
  top: 0;
}

.piano-key:active,
.piano-key.pressed {
  background: #ccc;
}

.piano-key.black:active,
.piano-key.black.pressed {
  background: #555;
}

canvas {
  background: #414231;
  border-radius: 8px;
  display: block;
  box-sizing: border-box;
  width: 100%;
  height: auto;
}

.language-selector {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 1000;
}

.language-dropdown {
  position: relative;
  display: inline-block;
}

.language-btn {
  background-color: #414231;
  color: #EFF7F8;
  border: 2px solid #EFF7F8;
  border-radius: 6px;
  padding: 8px 12px;
  font-size: 0.875rem;
  font-family: 'Courier New', monospace;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
  min-width: auto;
  width: auto;
  transition: all 0.3s ease;
  outline: none;
}

.language-options {
  position: absolute;
  top: 100%;
  right: 0;
  background-color: #414231;
  border: 2px solid #EFF7F8;
  border-radius: 6px;
  border-top: none;
  max-height: 150px;
  overflow-y: auto;
  min-width: 110px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: all 0.3s ease;
}

.language-dropdown.open .language-options {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.language-option {
  padding: 8px 12px;
  font-size: 0.875rem;
  color: #EFF7F8;
  background: none;
  border: none;
  text-align: left;
  width: 100%;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
  font-family: 'Courier New', monospace;
  transition: background-color 0.2s ease;
}

.language-option:hover {
  background-color: #EFF7F8;
  color: #414231;
}

.language-option.selected {
  background-color: #4a5241;
  font-weight: bold;
}

.language-dropdown-icon {
  width: 12px;
  height: 12px;
}

.flag-emoji {
  font-size: 1em;
}

/* Loading indicator */
.translate-loading {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background-color: rgba(65, 66, 49, 0.9);
  color: #00CC58;
  padding: 20px;
  border-radius: 8px;
  border: 2px solid #00CC58;
  z-index: 10000;
  display: none;
  font-family: 'Courier New', monospace;
}

.spinner {
  border: 2px solid transparent;
  border-top: 2px solid #00CD58;
  border-radius: 50%;
  width: 20px;
  height: 20px;
  animation: spin 1s linear infinite;
  display: inline-block;
  margin-right: 10px;
}

/* Responsive breakpoints */

/* Large tablets and small desktops */
@media (max-width: 1200px) {
  .app-container {
    padding: 15px;
    gap: 15px;
  }
  
  #charts-container {
    width: 220px;
  }
  
  #staff {
    padding: 20px 24px;
  }
  
  #layout {
    gap: 40px;
  }
}

/* Tablets */
@media (max-width: 992px) {
  .app-container {
    flex-direction: column;
    padding: 15px;
    padding-bottom: 180px;
  }
  
  #charts-container {
    width: 100%;
    flex-direction: row;
    overflow-x: auto;
    gap: 15px;
    position: static;
    max-height: none;
  }
  
  .main-content {
    width: 100%;
    max-width: none;
  }
  
  #staff {
    min-height: 220px;
    padding: 20px 24px;
    margin: 20px auto;
    max-width: 750px;
  }
  
  #layout {
    flex-direction: column;
    gap: 20px;
    align-items: center;
  }
}

/* Small tablets and large phones */
@media (max-width: 768px) {
  .app-container {
    padding: 10px;
    padding-bottom: 160px;
  }
  
  h1 {
    margin-bottom: 16px;
  }
  
  button {
    padding: 12px 20px;
    font-size: 0.9rem;
    min-width: 100px;
  }
  
  #staff {
    min-height: 180px;
    padding: 16px 20px;
    margin: 15px auto;
    max-width: 600px;
  }
  
  #virtual-piano {
    height: 120px;
  }
  
  .piano-key {
    width: 35px;
    height: 120px;
  }
  
  .piano-key.black {
    width: 24px;
    height: 80px;
  }
  
  .language-selector {
    top: 15px;
    right: 15px;
  }
  
  .language-btn {
    padding: 6px 10px;
    font-size: 0.8rem;
  }
  
  .language-option {
    padding: 6px 10px;
    font-size: 0.8rem;
  }
}

/* Mobile phones */
@media (max-width: 576px) {
  .app-container {
    padding: 8px;
    padding-bottom: 140px;
  }
  
  h1 {
    font-size: 1.5rem;
    margin-bottom: 12px;
  }
  
  .controls {
    flex-direction: column;
    align-items: center;
    gap: 8px;
  }
  
  button {
    width: 100%;
    max-width: 200px;
    padding: 10px 16px;
    font-size: 0.85rem;
  }
  
  #staff {
    min-height: 160px;
    padding: 12px 16px;
    margin: 10px auto;
    max-width: 500px;
  }
  
  #virtual-piano-wrapper {
    padding: 8px;
  }
  
  #virtual-piano {
    height: 100px;
  }
  
  .piano-key {
    width: 30px;
    height: 100px;
  }
  
  .piano-key.black {
    width: 20px;
    height: 65px;
  }
  
  #charts-container {
    gap: 10px;
  }
  
  #exercise-info,
  #stats {
    font-size: 0.9rem;
  }
}

/* Extra small phones */
@media (max-width: 400px) {
  .piano-key {
    width: 25px;
    height: 90px;
  }
  
  .piano-key.black {
    width: 18px;
    height: 60px;
  }
  
  #virtual-piano {
    height: 90px;
  }
  
  h1 {
    font-size: 1.25rem;
  }
  
  button {
    font-size: 0.8rem;
    padding: 8px 12px;
  }
}

/* Landscape orientation for mobile */
@media (max-height: 500px) and (orientation: landscape) {
  .app-container {
    padding-bottom: 120px;
  }
  
  #virtual-piano-wrapper {
    padding: 5px;
  }
  
  #virtual-piano {
    height: 80px;
  }
  
  .piano-key {
    width: 28px;
    height: 80px;
  }
  
  .piano-key.black {
    width: 20px;
    height: 50px;
  }
  
  h1 {
    font-size: 1.25rem;
    margin-bottom: 8px;
  }
  
  #staff {
    min-height: 80px;
    padding: 8px 12px;
  }
}

/* High DPI screens */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
  canvas {
    image-rendering: -webkit-optimize-contrast;
    image-rendering: crisp-edges;
  }
}

/* Animations */
@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

@keyframes slideDown {
  from { transform: translateY(-30px); opacity: 0; }
  to   { transform: translateY(0); opacity: 1; }
}

@keyframes fadeInUp {
  from { transform: translateY(40px); opacity: 0; }
  to   { transform: translateY(0); opacity: 1; }
}

@keyframes pulse {
  0%, 100% { opacity: 0.6; transform: scale(1); }
  50% { opacity: 1; transform: scale(1.05); }
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}