/* Basic reset only */
* { box-sizing: border-box; }
html { 
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: radial-gradient(1200px 900px at 50% 0%, #15214a 0%, #070A12 55%, #02030a 100%);
  background-attachment: fixed;
}
body { 
  width: 100%;
  height: 100%;
  margin: 0; 
  padding: 0;
  overflow: hidden;
}

/* App layout */
:root{
  --bg0: #070A12;
  --bg1: #0A1022;
  --panel: rgba(255,255,255,0.06);
  --panel2: rgba(255,255,255,0.09);
  --border: rgba(255,255,255,0.14);
  --text: rgba(255,255,255,0.92);
  --text-secondary: rgba(255,255,255,0.72);
  --text-tertiary: rgba(255,255,255,0.54);
  --shadow: 0 14px 45px rgba(0,0,0,0.55);
  --radius: 16px;
  --layout-question-pct: 33;
  --layout-instrument-pct: 34;
  --layout-answer-pct: 33;
  --base-question-box-height: 220px;
  --base-answer-button-height: 75px;
  --note-position-scale: 1;
  --guitar-note-base-size: 28px;
  --bass-note-base-size: 28px;
  --landscape-rail-offset: 56px;
  --instrument-expanded-left: 0px;
}

body{
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  color: var(--text);
}

/* Splash & Start Screens */
.splashScreen {
  position: fixed;
  inset: 0;
  background: radial-gradient(1200px 900px at 50% 0%, #15214a 0%, #070A12 55%, #02030a 100%);
  z-index: 100000;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 2rem;
  transition: opacity 1s ease;
  cursor: pointer;
}

.splashTitle {
  font-size: clamp(3rem, 10vw, 6rem);
  margin-bottom: 1rem;
  background: linear-gradient(135deg, #fff, #a0a0a0);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  filter: drop-shadow(0 4px 10px rgba(0,0,0,0.5));
}

.splashInstructions {
  font-size: clamp(1.2rem, 4vw, 2rem);
  color: rgba(255, 255, 255, 0.8);
  max-width: 600px;
  line-height: 1.5;
}

.app{
  height: 100vh;
  display: flex;
  flex-direction: column;
  padding-top: calc(max(20px, env(safe-area-inset-top)) + 56px);
  padding-right: max(20px, env(safe-area-inset-right));
  padding-bottom: max(20px, env(safe-area-inset-bottom));
  padding-left: max(20px, env(safe-area-inset-left));
  gap: 12px;
  max-width: none;
  margin: 0;
  overflow: hidden;
  opacity: 0;
  transition: opacity 0.5s ease;
  pointer-events: none;
}

.app.visible {
  opacity: 1;
  pointer-events: auto;
}

.header {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  padding: 0.75rem 1rem;
  background: transparent;
  transition: opacity 1.5s ease, transform 1.5s ease, filter 1.5s ease;
  opacity: 1;
  transform: translateY(0);
  filter: blur(0px);
}

.header.faded {
  opacity: 0.15;
  transform: translateY(-4px);
  filter: blur(3px);
  pointer-events: auto;
}

.header.faded:hover,
.header.faded:focus-within {
  opacity: 1;
  transform: translateY(0);
  filter: blur(0px);
  transition: opacity 0.3s ease, transform 0.3s ease, filter 0.3s ease;
}

.headerRow {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
}

.headerTop {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
}

.headerSpacer {
  width: 40px;
}

.headerBottom {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.25rem;
}

.headerStat {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.75rem;
  font-size: 1.125rem;
  font-weight: 600;
  white-space: nowrap;
}

.statValue {
  color: var(--text);
  font-variant-numeric: tabular-nums;
}

.title{ 
  margin: 0; 
  font-size: 22px; 
  letter-spacing: 0.3px;
  text-align: center;
  justify-self: center;
}

.subtitle {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin: 0;
  font-weight: 400;
}

.levelInfo {
  font-size: 0.875rem;
  color: var(--text);
  margin: 0.25rem 0 0;
  font-weight: 600;
  background: linear-gradient(180deg, rgba(64,230,160,0.15), rgba(64,230,160,0.08));
  border: 1px solid rgba(64,230,160,0.25);
  border-radius: 8px;
  padding: 0.35rem 0.75rem;
  display: inline-block;
}

.main > .levelInfo {
  align-self: center;
}

.levelInfo[hidden] {
  display: none;
}

.version {
  font-size: 0.7rem;
  color: var(--text-tertiary);
  margin: 0;
  font-weight: 300;
  opacity: 0.7;
}

.controls {
  display: flex;
  gap: 0.75rem;
  justify-content: center;
  align-items: center;
}

.btn{
  appearance: none;
  border: 1px solid rgba(255,255,255,0.12);
  background: rgba(255,255,255,0.06);
  color: var(--text);
  padding: 8px 16px;
  border-radius: 10px;
  font-weight: 600;
  font-size: 14px;
  letter-spacing: 0.2px;
  cursor: pointer;
  touch-action: manipulation;
  transition: all 0.15s ease;
}
.btn:hover{ 
  background: rgba(255,255,255,0.10);
  border-color: rgba(255,255,255,0.18);
  transform: translateY(-1px);
}
.btn:active{ 
  transform: translateY(1px);
  background: rgba(255,255,255,0.04);
}
.btn.primary{
  background: linear-gradient(180deg, rgba(64,230,160,0.20), rgba(64,230,160,0.10));
  border-color: rgba(64,230,160,0.35);
}
.btn.primary:hover{
  background: linear-gradient(180deg, rgba(64,230,160,0.28), rgba(64,230,160,0.16));
  border-color: rgba(64,230,160,0.50);
  transform: translateY(-1px);
}
.btn.primary:active{
  background: linear-gradient(180deg, rgba(64,230,160,0.16), rgba(64,230,160,0.08));
  transform: translateY(1px);
}
.btn.secondary{
  background: linear-gradient(180deg, rgba(100,150,255,0.18), rgba(100,150,255,0.08));
  border-color: rgba(100,150,255,0.30);
}
.btn.secondary:hover{
  background: linear-gradient(180deg, rgba(100,150,255,0.26), rgba(100,150,255,0.14));
  border-color: rgba(100,150,255,0.45);
  transform: translateY(-1px);
}
.btn.secondary:active{
  background: linear-gradient(180deg, rgba(100,150,255,0.14), rgba(100,150,255,0.06));
  transform: translateY(1px);
}

.iconBtn{
  appearance: none;
  border: none;
  background: transparent;
  color: var(--text);
  width: 40px;
  height: 40px;
  border-radius: 10px;
  font-size: 20px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.15s ease;
  justify-self: end;
}

.triangleMenu {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 9999;
  pointer-events: none;
  transition: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.menuBar {
  position: fixed;
  top: 0;
  left: 0;
  width: 56px;
  height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  padding: 10px 8px;
  background: linear-gradient(180deg, rgba(10, 18, 36, 0.96), rgba(3, 10, 24, 0.92));
  border-right: 1px solid rgba(255,255,255,0.08);
  box-shadow: 6px 0 20px rgba(0,0,0,0.24);
  backdrop-filter: blur(8px);
  z-index: 10000;
  pointer-events: auto;
  transition: opacity 0.2s ease, transform 0.2s ease;
}

.menuReviewNext {
  position: relative;
  top: auto;
  left: auto;
  width: 40px;
  height: 40px;
  border-radius: 10px;
  border: 1px solid rgba(64,230,160,0.45);
  background: linear-gradient(180deg, rgba(64,230,160,0.28), rgba(64,230,160,0.12));
  color: var(--text);
  font-size: 0.72rem;
  font-weight: 800;
  cursor: pointer;
  pointer-events: auto;
  z-index: 10002;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 auto;
}

.menuReviewNext:hover {
  transform: translateY(-1px);
  border-color: rgba(64,230,160,0.65);
}

.triangleMenu.active {
  width: 100vw;
  height: 100vh;
}

.triangleToggle {
  appearance: none;
  background: transparent;
  border: none;
  cursor: pointer;
  position: relative;
  top: auto;
  left: auto;
  transition: none;
  padding: 0;
  width: 34px;
  height: 34px;
  pointer-events: auto;
  z-index: 10002;
  display: flex;
  align-items: center;
  justify-content: center;
}

.instrumentToggle {
  appearance: none;
  width: 40px;
  height: 40px;
  border-radius: 10px;
  border: 1px solid rgba(255,255,255,0.16);
  background: rgba(0,0,0,0.35);
  color: var(--text);
  font-size: 20px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
  position: relative;
  z-index: 10004;
  flex: 0 0 auto;
}

.instrumentToggle:hover {
  border-color: rgba(255,255,255,0.28);
  transform: translateY(-1px);
}

.instrumentToggle[aria-pressed="true"] {
  background: linear-gradient(180deg, rgba(64,230,160,0.28), rgba(64,230,160,0.14));
  border-color: rgba(64,230,160,0.5);
  box-shadow: 0 0 12px rgba(64,230,160,0.35);
}

.instrumentToggle:disabled {
  opacity: 0.45;
  cursor: not-allowed;
  border-color: rgba(255,255,255,0.12);
}

.triangleToggle::before {
  content: "";
  position: absolute;
  inset: -40%;
  background: linear-gradient(110deg,
      rgba(20,180,255,0.35),
      rgba(60,255,190,0.28),
      rgba(255,60,60,0.28),
      rgba(20,180,255,0.35));
  background-size: 300% 300%;
  animation: drift 5s linear infinite;
  filter: blur(18px);
  opacity: 0.4;
  transform: translateZ(0);
}

.triangleToggle:hover {
  border-color: rgba(255,255,255,0.22);
}

.triangleToggle:hover::before {
  opacity: 0.55;
  filter: blur(16px);
}

.triangleToggle:active {
  transform: scale(0.95);
}

.plusIcon {
  position: relative;
  font-size: 24px;
  font-weight: 300;
  line-height: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
  color: var(--text);
  pointer-events: none;
  z-index: 1;
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.triangleMenu.active .plusIcon {
  transform: rotate(45deg);
}

.menuBackdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(10px);
  z-index: 9999;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.4s ease, visibility 0s linear 0.4s;
  pointer-events: none;
}

.triangleMenu.active .menuBackdrop {
  opacity: 1;
  visibility: visible;
  transition: opacity 0.4s ease, visibility 0s linear 0s;
  pointer-events: auto;
}

.menuDropdown {
  position: fixed;
  top: 10px;
  left: 64px;
  transform: none;
  background: rgba(5, 10, 22, 0.88);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 18px;
  padding: 12px;
  display: grid;
  grid-template-columns: repeat(3, minmax(72px, 80px));
  gap: 12px;
  width: fit-content;
  max-width: calc(100vw - 74px);
  box-shadow: 0 18px 48px rgba(0,0,0,0.4);
  backdrop-filter: blur(14px);
  z-index: 10003;
  pointer-events: none;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.4s ease 0.2s, visibility 0s linear 0.6s;
}

.triangleMenu.active .menuDropdown {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transition: opacity 0.4s ease 0.2s, visibility 0s linear 0s;
}

.menuDropdown[hidden] {
  display: grid !important;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.menuItem {
  appearance: none;
  background: rgba(0,0,0,0.35);
  border: 1px solid rgba(255,255,255,0.14);
  width: 80px;
  height: 80px;
  padding: 0;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text);
  font-size: 1.5rem;
  border-radius: 16px;
  transition: all 0.2s ease;
  position: relative;
  overflow: hidden;
  transform: scale(0.8);
  animation: menuItemGrow 0.5s ease forwards;
  z-index: 1;
}

@keyframes menuItemGrow {
  from {
    transform: scale(0.8) translateY(20px);
    opacity: 0;
  }
  to {
    transform: scale(1) translateY(0);
    opacity: 1;
  }
}

.menuItem:nth-child(2) {
  animation-delay: 0.1s;
}

.menuItem:nth-child(3) {
  animation-delay: 0.2s;
}

.menuItem::before {
  content: "";
  position: absolute;
  inset: -40%;
  background: linear-gradient(110deg,
      rgba(20,180,255,0.35),
      rgba(60,255,190,0.28),
      rgba(255,60,60,0.28),
      rgba(20,180,255,0.35));
  background-size: 300% 300%;
  animation: drift 5s linear infinite;
  filter: blur(18px);
  opacity: 0.4;
  transform: translateZ(0);
}

.menuItem:hover {
  border-color: rgba(255,255,255,0.22);
  transform: translateY(-2px);
}

.menuItem:hover::before {
  opacity: 0.55;
  filter: blur(16px);
}

.menuItem:active {
  transform: translateY(0) scale(0.95);
}

.menuItemIcon {
  font-size: 2rem;
  line-height: 1;
  position: relative;
  z-index: 1;
  filter: grayscale(1) brightness(1.2);
}

#btnDonate .menuItemIcon {
  filter: none;
}

.iconBtn:hover{ 
  background: rgba(255,255,255,0.12);
  transform: scale(1.05);
}

.headerBtn:hover {
  background: linear-gradient(180deg, rgba(255,255,255,0.12), rgba(255,255,255,0.08));
  border-color: rgba(255,255,255,0.18);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(0,0,0,0.2);
}

.iconBtn:active{
  transform: scale(0.95);
  background: rgba(255,255,255,0.08);
}

.headerBtn:active {
  transform: translateY(0);
  box-shadow: 0 2px 6px rgba(0,0,0,0.15);
}

.main{
  display: flex;
  flex-direction: column;
  gap: 12px;
  flex: 1;
  min-height: 0;
  overflow: visible;
  position: relative;
}

/* Piano mode layout adjustments */
.main.pianoMode {
  gap: 8px;
}

.main.pianoMode .answerGrid {
  gap: 0.5rem;
  flex: 1;
  align-content: stretch;
}

.main.pianoMode .answerBtn {
  min-height: 0;
  padding: 0.5rem;
  font-size: clamp(22px, 3.5vw, 22px);
}

.main.pianoMode .bonusButton {
  position: absolute;
  top: 1rem;
  left: 5.2rem;
  right: auto;
  bottom: auto;
  margin-top: 0;
  align-self: auto;
  flex-shrink: 0;
}

.questionBoxWrap {
  position: relative;
  width: 100%;
  flex-shrink: 0;
}

.rotateHintBar {
  margin-top: 0.45rem;
  padding: 0.45rem 0.7rem;
  border-radius: 10px;
  background: rgba(255, 193, 7, 0.12);
  border: 1px solid rgba(255, 193, 7, 0.35);
  color: rgba(255, 245, 200, 0.95);
  font-size: 0.78rem;
  font-weight: 700;
  text-align: center;
  line-height: 1.2;
}

.questionBox {
  appearance: none;
  display: block;
  width: 100%;
  height: 100%;
  border: 1px solid var(--border);
  background: linear-gradient(180deg, rgba(255,255,255,0.08), rgba(255,255,255,0.04));
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: clamp(2rem, 8vh, 4rem) 1.5rem;
  text-align: center;
  cursor: pointer;
  transition: all 0.2s ease;
  position: relative;
  margin: 5px;
  overflow: visible;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: var(--base-question-box-height);
}

.studyBackBtn {
  position: fixed;
  top: 10px;
  left: 208px;
  transform: none;
  width: 1.9rem;
  height: 1.9rem;
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,0.24);
  background: rgba(8, 16, 36, 0.72);
  color: var(--text);
  font-size: 1rem;
  font-weight: 800;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  z-index: 4;
  pointer-events: auto;
  cursor: pointer;
  transition: transform 0.15s ease, opacity 0.15s ease, border-color 0.15s ease;
}

.studyBackBtn[aria-disabled="true"] {
  opacity: 0.35;
  cursor: not-allowed;
}

.studyBackBtn[aria-disabled="false"]:hover {
  border-color: rgba(255,255,255,0.45);
  transform: scale(1.06);
}

.playPauseBtn {
  position: fixed;
  top: 10px;
  left: 246px;
  transform: none;
  width: 1.9rem;
  height: 1.9rem;
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,0.24);
  background: rgba(8, 16, 36, 0.72);
  color: var(--text);
  font-size: 0.95rem;
  font-weight: 800;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  z-index: 4;
  pointer-events: auto;
  cursor: pointer;
  transition: transform 0.15s ease, opacity 0.15s ease, border-color 0.15s ease;
}

.menuBar .studyBackBtn,
.menuBar .playPauseBtn {
  position: relative;
  top: auto;
  left: auto;
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: none;
  width: 40px;
  height: 40px;
  padding: 0;
  border-radius: 10px;
  z-index: 10004;
  font-size: 0.95rem;
  background: rgba(8, 16, 36, 0.72);
  border: 1px solid rgba(255,255,255,0.24);
  animation: none;
  flex: 0 0 auto;
}

.menuBar .instrumentToggle {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  font-size: 20px;
  margin: 0;
}

.menuBar .studyBackBtn:hover,
.menuBar .playPauseBtn:hover {
  border-color: rgba(255,255,255,0.22);
  transform: translateY(-1px);
}

.menuBar .studyBackBtn:active,
.menuBar .playPauseBtn:active {
  transform: scale(0.95);
}

.menuBar .studyBackBtn .menuItemIcon,
.menuBar .playPauseBtn .menuItemIcon {
  font-size: 1rem;
  line-height: 1;
  position: relative;
  z-index: 10005;
  filter: grayscale(1) brightness(1.2);
}

.menuBar .studyBackBtn[aria-disabled="true"] {
  opacity: 0.35;
  cursor: not-allowed;
}

@media (max-width: 700px) {
  .menuDropdown {
    grid-template-columns: repeat(3, minmax(64px, 72px));
    gap: 10px;
    padding: 10px;
  }
}

.menuDropdown .playPauseBtn[aria-pressed="true"] {
  background: rgba(18, 44, 88, 0.88);
}

.playPauseBtn:hover {
  border-color: rgba(255,255,255,0.45);
  transform: scale(1.06);
}

.playPauseBtn[aria-pressed="true"] {
  background: rgba(18, 44, 88, 0.88);
}

.timerBackground {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: clamp(12rem, 30vw, 24rem);
  font-weight: 900;
  color: rgba(255, 255, 255, 0.06);
  pointer-events: none;
  user-select: none;
  z-index: 0;
  font-variant-numeric: tabular-nums;
}

.questionStats {
  position: absolute;
  top: 1rem;
  left: 1rem;
  right: 1rem;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  pointer-events: none;
}

.questionStat {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text);
  font-variant-numeric: tabular-nums;
  position: relative;
  z-index: 1;
}

.questionStat.score {
  font-size: 1.25rem;
  color: #ffdd57;
  font-weight: 700;
}

.bonusButton {
  position: absolute;
  top: 1rem;
  left: 5.2rem;
  right: auto;
  bottom: auto;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: row;
  gap: 0.35rem;
  background: linear-gradient(135deg, rgba(138, 43, 226, 0.3), rgba(75, 0, 130, 0.3));
  border: 2px solid rgba(138, 43, 226, 0.5);
  border-radius: 999px;
  height: 1.9rem;
  min-width: 3.2rem;
  padding: 0 0.45rem;
  font-size: 0.9rem;
  line-height: 1;
  font-weight: 700;
  color: #e0d0ff;
  cursor: pointer;
  transition: all 0.2s ease;
  z-index: 1;
  pointer-events: auto;
  box-shadow: 0 4px 12px rgba(138, 43, 226, 0.3);
}

body.settingsOpen .bonusButton {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.bonusButton:hover:not(:disabled) {
  background: linear-gradient(135deg, rgba(138, 43, 226, 0.5), rgba(75, 0, 130, 0.5));
  border-color: rgba(138, 43, 226, 0.8);
  transform: scale(1.05);
  box-shadow: 0 6px 16px rgba(138, 43, 226, 0.5);
}

.bonusButton:active:not(:disabled) {
  transform: scale(0.95);
}

.bonusButton:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  background: linear-gradient(135deg, rgba(100, 100, 100, 0.3), rgba(70, 70, 70, 0.3));
  border-color: rgba(100, 100, 100, 0.5);
}

.bonusButton.active {
  background: linear-gradient(135deg, rgba(138, 43, 226, 0.8), rgba(75, 0, 130, 0.8));
  border-color: #8a2be2;
  animation: pulse 1s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { box-shadow: 0 4px 12px rgba(138, 43, 226, 0.5); }
  50% { box-shadow: 0 6px 20px rgba(138, 43, 226, 0.8); }
}

.bonusIcon {
  font-size: 0.95rem;
  display: flex;
  align-items: center;
  position: relative;
  z-index: 2;
}

.bonusCount {
  font-size: 0.75rem;
  line-height: 1;
  font-variant-numeric: tabular-nums;
}

.questionBox:hover {
  background: linear-gradient(180deg, rgba(255,255,255,0.10), rgba(255,255,255,0.06));
  border-color: rgba(255,255,255,0.18);
  transform: translateY(-2px);
}

.questionBox:active {
  transform: translateY(0);
}

.questionText {
  font-size: clamp(1.8rem, 4.2vw, 3.6rem);
  font-weight: 900;
  color: var(--text);
  margin: 0;
  line-height: 1.1;
  max-width: 90%;
  text-align: center;
  letter-spacing: 0.02em;
  text-shadow: 0 4px 12px rgba(0, 0, 0, 0.4);
  position: relative;
  z-index: 2;
}

@keyframes controlsFadeIn {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

body:not(.gameActive) .main {
  justify-content: center;
}

body:not(.gameActive) .questionBoxWrap {
  max-width: min(92vw, 760px);
  margin: 0 auto;
}

body:not(.gameActive) .questionBox {
  min-height: var(--base-question-box-height);
}

body:not(.gameActive) .questionText {
  font-size: clamp(3rem, 11vw, 6.6rem);
  max-width: 100%;
}

body:not(.gameActive) .questionStats,
body:not(.gameActive) .studyBackBtn,
body:not(.gameActive) .playPauseBtn,
body:not(.gameActive) .bonusButton,
body:not(.gameActive) .triangleToggle,
body:not(.gameActive) .instrumentToggleGroup {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

body:not(.gameActive) .menuBar {
  opacity: 0;
  visibility: hidden;
}

body:not(.gameActive) .menuReviewNext {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

body:not(.gameActive) .answerGrid {
  display: none;
}

body:not(.gameActive) .pianoContainer,
body:not(.gameActive) .guitarContainer,
body:not(.gameActive) .bassContainer {
  display: none !important;
}

body.gameActive .questionStats,
body.gameActive .studyBackBtn,
body.gameActive .playPauseBtn,
body.gameActive .bonusButton,
body.gameActive .triangleToggle,
body.gameActive .instrumentToggleGroup,
body.gameActive .answerGrid {
  opacity: 1;
  visibility: visible;
  animation: controlsFadeIn 0.42s ease both;
}

.restartHint {
  position: absolute;
  bottom: 0.25rem;
  left: 50%;
  transform: translateX(-50%);
  font-size: 0.7rem;
  color: var(--text-tertiary);
  opacity: 0;
  transition: opacity 0.3s ease;
  pointer-events: none;
  font-weight: 500;
  letter-spacing: 0.3px;
  z-index: 1;
}

.questionBox:hover .restartHint {
  opacity: 0.6;
}

.questionSuggestions {
  margin-top: 2rem;
  padding: 0 1rem;
  max-width: 100%;
  max-height: 50vh;
  overflow-y: auto;
  font-size: 0.85rem;
  pointer-events: auto;
  z-index: 2;
}

.questionBox.reviewVisible {
  justify-content: flex-start;
  align-items: stretch;
  overflow: hidden;
}

.questionBox.gameOverLayout {
  justify-content: flex-start;
  align-items: center;
  gap: clamp(0.9rem, 2vh, 1.4rem);
  padding: clamp(4.25rem, 8vh, 5.5rem) clamp(1rem, 3vw, 2rem) clamp(1rem, 3vh, 1.5rem);
  min-height: min(78vh, 760px);
  cursor: default;
  overflow: hidden;
}

.questionBox.gameOverLayout:hover,
.questionBox.gameOverLayout:active {
  transform: none;
}

.questionBox.gameOverLayout .questionText {
  max-width: min(100%, 16ch);
  font-size: clamp(1.5rem, 4.4vw, 3.4rem);
  line-height: 1.08;
  text-wrap: balance;
}

.questionBox.gameOverLayout .restartHint {
  display: none;
}

.questionBox.gameOverLayout .questionSuggestions {
  width: min(100%, 820px);
  margin-top: 0;
  padding: 0 0.15rem 0.15rem;
  max-height: min(48vh, 420px);
  overflow-y: auto;
  overscroll-behavior: contain;
}

.questionBox.gameOverLayout .questionSuggestions .practiceSteps {
  gap: 0.85rem;
}

.questionBox.gameOverLayout .questionSuggestions .practiceStep {
  padding: 0.9rem;
}

.questionBox.gameOverLayout .questionSuggestions .stepContent {
  text-align: left;
}

.questionBox.reviewVisible .questionSuggestions {
  margin-top: 0.75rem;
  padding: 0;
  max-height: none;
  flex: 1 1 auto;
  overflow-y: auto;
}

.questionBox.teachVisible {
  justify-content: center;
  align-items: center;
  overflow: hidden;
}

.questionBox.teachVisible .questionText {
  max-width: min(92%, 920px);
}

.questionBox.teachVisible .questionSuggestions {
  margin-top: 0.65rem;
  width: 100%;
  max-width: 920px;
  padding: 0 0.25rem;
  max-height: 44vh;
  overflow-y: auto;
}

.questionBox.reviewVisible .questionSuggestions .practiceSteps {
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.questionBox.reviewVisible #btnNextAfterScaleReview {
  align-self: center;
  width: min(240px, 100%);
  margin-top: 0.6rem;
}

.questionSuggestions .practiceSteps {
  gap: 0.75rem;
}

.questionSuggestions .practiceStep {
  font-size: 0.9em;
  background: rgba(0, 0, 0, 0.3);
}

.questionSuggestions .stepNumber {
  width: 28px;
  height: 28px;
  font-size: 0.85rem;
}

.questionSuggestions .stepContent h4 {
  font-size: 0.95rem;
}

.questionSuggestions .stepContent p {
  font-size: 0.85rem;
}

.questionSuggestions .btnApply {
  font-size: 0.8rem;
  padding: 0.4rem 0.9rem;
}

.teachModePanel {
  display: grid;
  gap: 0.7rem;
  padding: 0.85rem;
  border: 1px solid rgba(64, 230, 160, 0.35);
  border-radius: 12px;
  background: rgba(6, 18, 26, 0.55);
  text-align: left;
  align-content: start;
  justify-items: stretch;
}

.teachSummary {
  margin: 0;
  font-size: 0.92rem;
  color: rgba(235, 255, 247, 0.95);
  line-height: 1.35;
}

.teachRule {
  margin: -0.15rem 0 0;
  font-size: 0.74rem;
  font-weight: 700;
  color: rgba(255, 214, 128, 0.92);
}

.teachLessonGrid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.55rem;
}

.teachLessonCard {
  display: grid;
  gap: 0.18rem;
  padding: 0.65rem 0.7rem;
  border-radius: 10px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(255, 255, 255, 0.05);
}

.teachLessonCardPrimary {
  border-color: rgba(255, 210, 80, 0.35);
  background: rgba(255, 210, 80, 0.08);
}

.teachLessonLabel {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: rgba(235, 255, 247, 0.62);
}

.teachLessonCard strong {
  font-size: 0.98rem;
  color: rgba(255, 255, 255, 0.96);
  line-height: 1.15;
}

.teachTutorial {
  border: 1px solid rgba(255, 255, 255, 0.18);
  background: rgba(255, 255, 255, 0.06);
  border-radius: 10px;
  padding: 0.5rem 0.6rem;
}

.teachTutorial strong {
  display: inline-block;
  margin-bottom: 0.25rem;
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.95);
}

.teachTutorial p {
  margin: 0.18rem 0;
  font-size: 0.8rem;
  color: rgba(235, 255, 247, 0.9);
}

.teachControls {
  display: flex;
  gap: 0.55rem;
  justify-content: center;
}

@media (max-width: 700px) {
  .teachLessonGrid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.timerRow{
  display:flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
  padding-top: 4px;
  border-top: 1px solid rgba(255,255,255,0.10);
}
.timerLabel{
  font-size: 12px;
  color: var(--muted);
  font-weight: 700;
  letter-spacing: 0.6px;
  text-transform: uppercase;
}
.timer{
  font-variant-numeric: tabular-nums;
  font-size: 22px;
  font-weight: 900;
}

.livesRow{
  display:flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
  padding-top: 8px;
  border-top: 1px solid rgba(255,255,255,0.10);
}
.livesLabel{
  font-size: 12px;
  color: var(--muted);
  font-weight: 700;
  letter-spacing: 0.6px;
  text-transform: uppercase;
}
.lives{
  font-size: 20px;
  letter-spacing: 0.15em;
  line-height: 1;
}

/* Status overlay backdrop */
.statusOverlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.66);
  z-index: 100;
  display: none;
  animation: fadeIn 0.2s ease;
}

.statusOverlay:not([hidden]) {
  display: block;
}

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

/* Status panel with animated moving gradient */
.statusPanel{
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 90%;
  max-width: 600px;
  max-height: 85vh;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow), 0 20px 60px rgba(0,0,0,0.8);
  overflow: hidden;
  min-height: clamp(120px, 15vh, 150px);
  background: rgba(15,20,35,0.95);
  z-index: 101;
  display: none;
  animation: modalSlideIn 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
  will-change: transform, opacity;
}

.statusPanel:not([hidden]) {
  display: block;
}

.statusPanel.gameOver {
  width: min(82vw, 480px);
  max-width: 480px;
  min-height: clamp(96px, 12vh, 124px);
  max-height: 70vh;
}

.statusPanel.gameOver .statusContent {
  padding: 10px 12px;
  gap: 8px;
}

.statusPanel.gameOver .statusText {
  font-size: clamp(12px, 1.7vw, 15px);
  line-height: 1.15;
}

body.gameOverVisible .questionStats,
body.gameOverVisible .timerBackground,
body.gameOverVisible .studyBackBtn,
body.gameOverVisible .playPauseBtn,
body.gameOverVisible .bonusButton,
body.gameOverVisible .instrumentToggleGroup,
body.gameOverVisible .rotateHintBar {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

body.gameOverVisible .main {
  justify-content: center;
}

body.gameOverVisible .questionBoxWrap {
  max-width: min(94vw, 920px);
  margin: 0 auto;
}

body.gameOverVisible .questionBox {
  min-height: min(78vh, 760px);
}

body.gameOverVisible .answerGrid,
body.gameOverVisible .pianoContainer,
body.gameOverVisible .guitarContainer,
body.gameOverVisible .bassContainer {
  display: none !important;
}

@keyframes modalSlideIn {
  from {
    transform: translate(-50%, -50%) scale(0.9);
    opacity: 0;
  }
  to {
    transform: translate(-50%, -50%) scale(1);
    opacity: 1;
  }
}
.statusPanel::before{
  content:"";
  position:absolute;
  inset: -18%;
  background: linear-gradient(110deg,
      rgba(20,180,255,0.42),
      rgba(60,255,190,0.34),
      rgba(255,60,60,0.34),
      rgba(20,180,255,0.42));
  background-size: 220% 220%;
  animation: drift 10s linear infinite;
  filter: blur(12px);
  opacity: 0.32;
  transform: translateZ(0);
  will-change: transform, opacity;
}
@keyframes drift{
  0% { background-position: 0% 50%; transform: translate(-2%, -2%) rotate(0deg); }
  50%{ background-position: 100% 50%; transform: translate(2%, 2%) rotate(4deg); }
  100%{ background-position: 0% 50%; transform: translate(-2%, -2%) rotate(0deg); }
}

/* Good / Bad emphasis (JS toggles ONLY these classes) */
.statusPanel.good::before{ opacity: 0.4; filter: blur(12px) saturate(1.08); }
.statusPanel.bad::before { opacity: 0.45; filter: blur(12px) saturate(1.08); }

.statusContent{
  position: relative;
  z-index: 1;
  height: 100%;
  padding: 14px 16px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
}

.statusText{
  font-size: 14px;
  font-weight: 750;
  color: rgba(255,255,255,0.92);
  line-height: 1.2;
  text-align: center;
}

.statusSuggestions {
  margin-top: 1.5em;
  padding: 0;
  background: transparent;
  border: none;
  font-size: 13px;
  line-height: 1.5;
  color: rgba(255, 255, 255, 0.85);
  max-width: 100%;
  text-align: left;
}

.statusSuggestions .practiceSteps {
  gap: 0.75rem;
}

.statusSuggestions .practiceStep {
  font-size: 0.95em;
}

.statusSuggestions ul {
  margin: 0.5em 0;
  padding-left: 1.5em;
}

.statusSuggestions li {
  margin: 0.3em 0;
  color: rgba(255, 255, 255, 0.8);
}

.statusSuggestions strong {
  color: rgba(255, 255, 255, 0.95);
}

.statusSuggestions button:hover {
  background: linear-gradient(180deg, rgba(100,200,100,0.4), rgba(100,200,100,0.3)) !important;
  border-color: rgba(100,200,100,0.7) !important;
  transform: translateY(-1px);
}

.statusSuggestions button:active {
  transform: translateY(0) scale(0.98);
}

/* Faces rendered via CSS (no images) */
.face{
  width: 54px;
  height: 54px;
  border-radius: 999px;
  border: 2px solid rgba(255,255,255,0.22);
  background: rgba(0,0,0,0.28);
  position: relative;
  display: none; /* shown by good/bad only */
  box-shadow: 0 10px 20px rgba(0,0,0,0.35);
}
.face::before, .face::after{
  content:"";
  position:absolute;
  top: 18px;
  width: 7px;
  height: 7px;
  border-radius: 999px;
  background: rgba(255,255,255,0.9);
}
.face::before{ left: 16px; }
.face::after{ right: 16px; }

/* Mouths via background strokes */
.faceGood{
  border-color: rgba(80,255,190,0.35);
  background:
    linear-gradient(rgba(230,255,248,0.92), rgba(230,255,248,0.92));
  background-size: 22px 3px;
  background-position: 50% 34px;
  background-repeat: no-repeat;
  box-shadow:
    inset 0 -10px 0 rgba(60,255,190,0.08),
    0 10px 20px rgba(0,0,0,0.35);
}
.faceBad{
  border-color: rgba(255,90,90,0.42);
  background:
    linear-gradient(rgba(255,240,240,0.92), rgba(255,240,240,0.92));
  background-size: 22px 3px;
  background-position: 50% 37px;
  background-repeat: no-repeat;
  box-shadow:
    inset 0 -10px 0 rgba(255,70,70,0.08),
    0 10px 20px rgba(0,0,0,0.35);
}

/* Show the correct face based on panel class */
.statusPanel.good .faceGood{ display:block; }
.statusPanel.bad  .faceBad { display:block; }
.statusPanel.good .faceBad { display:none; }
.statusPanel.bad  .faceGood{ display:none; }

/* Answers */
.answerGrid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(0.75rem, 2vh, 1.25rem);
  width: 100%;
  margin: 0;
  flex: 1;
  align-content: start;
  min-height: 0;
}

.answerBtn {
  appearance: none;
  border: 1px solid rgba(255,255,255,0.14);
  color: var(--text);
  border-radius: 12px;
  padding: clamp(0.1rem, 0.3vh, 0.3rem) 0.1rem;
  font-size: clamp(36px, 20vw, 90px);
  font-weight: 800;
  line-height: 1;
  letter-spacing: 0.2px;
  cursor: pointer;
  width: 100%;
  height: 100%;
  min-height: var(--base-answer-button-height);
  touch-action: manipulation;
  box-shadow: 0 8px 20px rgba(0,0,0,0.25);
  transition: transform 120ms ease, border-color 180ms ease;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  background: rgba(0,0,0,0.35);
  will-change: transform;
}

.answerBtn::before {
  content: "";
  position: absolute;
  inset: -18%;
  background: linear-gradient(110deg,
      rgba(20,180,255,0.22),
      rgba(60,255,190,0.16),
      rgba(255,60,60,0.16),
      rgba(20,180,255,0.22));
  background-size: 160% 160%;
  filter: blur(10px);
  opacity: 0.22;
  transform: translateZ(0);
}

.answerBtn > * {
  position: relative;
  z-index: 1;
}

.answerBtn:hover:not(:disabled)::before {
  opacity: 0.32;
  filter: blur(10px);
}

.answerBtn:hover:not(:disabled) {
  border-color: rgba(255,255,255,0.22);
}

.answerBtn:active:not(:disabled) {
  transform: translateY(1px) scale(0.98);
}

.answerBtn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

/* Highlight the correct answer when wrong is selected */
.answerBtn.correctAnswer {
  font-size: clamp(24px, 5.5vw, 48px);
  font-weight: 900;
  border: 2px solid rgba(74, 222, 128, 0.82);
  background: rgba(74, 222, 128, 0.15);
  box-shadow: 0 0 0 1px rgba(74, 222, 128, 0.18), 0 8px 20px rgba(0,0,0,0.22);
  transform: scale(1.03);
  animation: highlight-correct 0.22s ease-out;
}

.answerBtn.wrongSelection {
  border: 2px solid rgba(239, 68, 68, 0.88);
  background: rgba(239, 68, 68, 0.18);
  box-shadow: 0 0 0 1px rgba(239, 68, 68, 0.2), 0 8px 20px rgba(0,0,0,0.22);
}

.answerBtn.correctAnswer::after,
.answerBtn.wrongSelection::after {
  position: absolute;
  top: 8px;
  right: 8px;
  width: 1.4rem;
  height: 1.4rem;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.82rem;
  font-weight: 900;
  line-height: 1;
  color: #fff;
  z-index: 2;
  pointer-events: none;
}

.answerBtn.correctAnswer::after {
  content: "✓";
  background: rgba(34, 197, 94, 0.96);
  box-shadow: 0 3px 10px rgba(34, 197, 94, 0.22);
}

.answerBtn.wrongSelection::after {
  content: "✕";
  background: rgba(239, 68, 68, 0.96);
  box-shadow: 0 3px 10px rgba(239, 68, 68, 0.2);
}

@keyframes highlight-correct {
  0% {
    transform: scale(1);
    border-color: rgba(74, 222, 128, 0.3);
    background: rgba(74, 222, 128, 0.05);
  }
  100% {
    transform: scale(1.03);
    border-color: rgba(74, 222, 128, 0.8);
    background: rgba(74, 222, 128, 0.15);
  }
}

@media (max-width: 600px) {
  .answerGrid {
    grid-template-columns: repeat(2, 1fr);
    width: auto;
    height: auto;
  }
  
  .answerBtn {
    width: auto;
    height: auto;
    font-size: 1.1rem;
  }
}

/* Responsive: landscape mobile hides non-essential UI (CSS only) */
@media (orientation: landscape) {
  :root {
    --instrument-expanded-left: var(--landscape-rail-offset);
  }

  .rotateHintBar {
    display: none !important;
  }

  .header{ display:none; }
  .statusPanel{ display:none; }

  /* Show feedback in landscape when game is active */
  body.gameActive .statusPanel:not([hidden]) {
    display: block !important;
    z-index: 10001;
  }

  body.gameActive .statusOverlay:not([hidden]) {
    z-index: 10000;
    background: rgba(0, 0, 0, 0.4);
    backdrop-filter: none;
  }

  /* Don't block clicks in expanded instrument view */
  body.gameActive .main.instrument-view-expanded .statusOverlay {
    pointer-events: none !important;
    background: transparent !important;
  }

  body.gameActive .main.instrument-view-expanded .statusPanel {
    pointer-events: none !important;
    width: min(60vw, 360px);
    min-height: auto;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
  }
  .app{
    width: 100%;
    max-width: none;
    margin: 0;
    padding: 10px 10px 10px var(--landscape-rail-offset);
    gap: 10px;
  }
  .questionBox{ padding: 12px; }

  /* Push question text below the absolute stats row when game is active */
  body.gameActive .questionBox:not(.reviewVisible) {
    padding-top: 2.8rem;
  }

  .questionBox.reviewVisible {
    padding: 8px 10px;
  }

  .questionBox.reviewVisible .questionText {
    font-size: clamp(0.95rem, 2vw, 1.3rem);
    line-height: 1.15;
    margin-bottom: 0.35rem;
  }

  .questionBox.reviewVisible .questionSuggestions {
    max-height: 100%;
    margin-top: 0.35rem;
  }

  .questionBox.reviewVisible .questionSuggestions .practiceStep {
    padding: 0.6rem;
    font-size: 0.82rem;
  }

  .questionBox.reviewVisible #btnNextAfterScaleReview {
    min-height: 34px;
    font-size: 0.86rem;
    padding: 0.45rem 0.9rem;
  }

  .questionBox.teachVisible {
    padding: 8px 10px;
  }

  .questionBox.teachVisible .questionText {
    font-size: clamp(0.95rem, 2vw, 1.28rem);
    line-height: 1.15;
    margin-bottom: 0.2rem;
  }

  .questionBox.teachVisible .questionSuggestions {
    margin-top: 0.35rem;
    max-height: 100%;
  }

  body.gameActive .main.no-answer-grid .questionBox.teachVisible {
    padding-top: 0.5rem;
    padding-bottom: 0.5rem;
  }

  body.gameActive .main.no-answer-grid .questionBox.teachVisible .questionText {
    display: none;
  }

  body.gameActive .main.no-answer-grid .questionBox.teachVisible .questionSuggestions {
    margin-top: 0;
  }

  body.gameActive .main.no-answer-grid .questionBox.teachVisible .teachModePanel {
    gap: 0.45rem;
    padding: 0.55rem 0.65rem;
  }

  body.gameActive .main.no-answer-grid .questionBox.teachVisible .teachSummary {
    font-size: 0.74rem;
    line-height: 1.2;
  }

  body.gameActive .main.no-answer-grid .questionBox.teachVisible .teachRule {
    margin-top: -0.1rem;
    font-size: 0.64rem;
  }

  body.gameActive .main.no-answer-grid .questionBox.teachVisible .teachLessonGrid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 0.35rem;
  }

  body.gameActive .main.no-answer-grid .questionBox.teachVisible .teachLessonCard {
    padding: 0.42rem 0.45rem;
    gap: 0.08rem;
  }

  body.gameActive .main.no-answer-grid .questionBox.teachVisible .teachLessonLabel {
    font-size: 0.58rem;
  }

  body.gameActive .main.no-answer-grid .questionBox.teachVisible .teachLessonCard strong {
    font-size: 0.76rem;
  }

  body.gameActive .main.no-answer-grid .questionBox.teachVisible .teachControls {
    gap: 0.4rem;
    justify-content: flex-end;
  }

  body.gameActive .main.no-answer-grid .questionBox.teachVisible .teachControls .btn {
    min-height: 30px;
    padding: 0.32rem 0.55rem;
    font-size: 0.76rem;
  }

  body.gameActive .main.no-answer-grid .questionBox.teachVisible .teachControls .btn.secondary {
    display: none;
  }

  .statusPanel.gameOver {
    width: min(70vw, 420px);
    max-width: 420px;
    min-height: clamp(78px, 9vh, 96px);
    max-height: 58vh;
  }

  .statusPanel.gameOver .statusContent {
    padding: 8px 10px;
    gap: 6px;
  }

  .statusPanel.gameOver .statusText {
    font-size: clamp(11px, 1.8vw, 13px);
  }

  .main.pianoMode {
    margin-top: 0;
    margin-left: 0;
    padding-right: 12px;
    padding-bottom: 12px;
    padding-left: 12px;
  }

  .menuBar {
    top: 0;
    left: 0;
    width: 56px;
    height: 100vh;
  }

  .menuReviewNext {
    top: auto;
    left: auto;
  }

  .studyBackBtn {
    top: 210px;
    left: 10px;
  }

  .playPauseBtn {
    top: 248px;
    left: 10px;
  }

  .instrumentToggleGroup {
    top: 52px;
    left: 10px;
    flex-direction: column;
    gap: 6px;
  }

  .guitarContainer.instrumentExpanded,
  .bassContainer.instrumentExpanded,
  .pianoContainer.instrumentExpanded {
    top: 0;
    left: var(--landscape-rail-offset);
    right: 0;
    bottom: 0;
    padding: 6px;
  }

  .instrumentQuestionOverlay {
    top: 8px;
    left: 6px;
    right: 6px;
    font-size: clamp(0.56rem, 1.1vw, 0.75rem);
    padding: 3px 6px;
  }

  .pianoContainer.instrumentExpanded .pianoKeyboardWrap {
    flex: 1 1 auto;
    width: 100%;
    min-width: 0;
    max-width: 100%;
    overflow-x: scroll;
    overflow-y: hidden;
    -webkit-overflow-scrolling: touch;
    overscroll-behavior-x: contain;
    touch-action: pan-x;
    margin-top: 44px;
    min-height: 80px;
    display: flex;
    align-items: center;
  }

  .pianoContainer.instrumentExpanded .pianoKeyboard {
    width: max(280vw, 2400px);
    min-width: max(280vw, 2400px);
    height: clamp(100px, 30vmin, 160px);
    min-height: 100px;
    max-height: unset;
    aspect-ratio: unset;
    margin-left: 8px;
    margin-right: 8px;
    overflow: visible;
    flex: 0 0 auto;
  }

  .guitarContainer.instrumentExpanded .guitarFretboard,
  .bassContainer.instrumentExpanded .bassFretboard {
    margin-top: 44px;
    flex: 1 1 0;
    min-height: 0;
    width: 100%;
    margin-left: 0;
    margin-right: 0;
  }

  body.gameActive .main {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(88px, 16vw);
    grid-template-rows: minmax(0, 1fr) 60vh;
    grid-template-areas:
      "question answers"
      "instrument answers";
    column-gap: 8px;
    row-gap: 8px;
    align-items: stretch;
    overflow: hidden;
  }

  body.gameActive .main .questionBoxWrap {
    grid-area: question;
    margin: 0;
    min-height: 0;
  }

  body.gameActive .main .questionBox {
    padding: 0.85rem 1rem;
    min-height: 0;
  }

  body.gameActive .main .questionBox:not(.reviewVisible) {
    padding: 2.8rem 1rem 0.85rem;
    min-height: 0;
  }

  body.gameActive .main .questionText {
    font-size: clamp(1.05rem, 2.3vw, 1.65rem);
  }

  body.gameActive .main .timerBackground {
    font-size: clamp(4rem, 10vw, 7rem);
  }

  body.gameActive .main .pianoContainer,
  body.gameActive .main .guitarContainer,
  body.gameActive .main .bassContainer {
    grid-area: instrument;
    min-height: 0;
    height: 100%;
    max-width: 100%;
    padding: 8px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    justify-self: stretch;
    overflow: hidden;
  }

  body.gameActive .main .pianoContainer .pianoKeyboardWrap {
    width: 100%;
    height: 100%;
    overflow-x: auto;
    overflow-y: hidden;
    -webkit-overflow-scrolling: touch;
    touch-action: pan-x;
  }

  body.gameActive .main .pianoContainer .pianoKeyboard {
    height: 100%;
    min-height: 100%;
    max-height: none;
    width: max(100%, 820px);
    min-width: 820px;
    aspect-ratio: auto;
    flex-shrink: 0;
    margin-left: 0;
    margin-right: 0;
  }

  body.gameActive .main.instrument-view-expanded {
    overflow: visible;
  }

  body.gameActive .main .guitarContainer .guitarFretboard {
    height: auto;
    min-height: 0;
    max-height: 100%;
    width: 100%;
    aspect-ratio: 10 / 3;
    flex-shrink: 1;
    margin-left: 0;
    margin-right: 0;
  }
  body.gameActive .main .guitarContainer {
    max-width: none;
    aspect-ratio: 4 / 1;
  }

  body.gameActive .main .bassContainer .bassFretboard {
    height: auto;
    min-height: 0;
    max-height: 100%;
    width: 100%;
    aspect-ratio: 4 / 1;
    flex-shrink: 1;
    margin-left: 0;
    margin-right: 0;
  }

  body.gameActive .main .bassContainer {
    max-width: none;
    aspect-ratio: 18 / 5;
  }

  body.gameActive .main .answerGrid {
    grid-area: answers;
    grid-template-columns: minmax(0, 1fr);
    grid-auto-rows: minmax(0, 1fr);
    align-content: stretch;
    gap: 6px;
    height: 100%;
    min-height: 0;
    margin: 0;
    justify-self: end;
    width: min(16vw, 132px);
    padding-right: 4px;
  }

  body.gameActive .main .answerBtn {
    min-height: 0;
    padding: clamp(0.05rem, 0.1vh, 0.15rem) 0.1rem;
    min-height: 0;
    font-size: clamp(14px, 3vw, 26px);
    animation: answerSlideLandscape 0.35s ease both;
  }

  body.gameActive .main .answerBtn:nth-child(1) { animation-delay: 0.02s; }
  body.gameActive .main .answerBtn:nth-child(2) { animation-delay: 0.06s; }
  body.gameActive .main .answerBtn:nth-child(3) { animation-delay: 0.10s; }
  body.gameActive .main .answerBtn:nth-child(4) { animation-delay: 0.14s; }
  body.gameActive .main .answerBtn:nth-child(5) { animation-delay: 0.18s; }
  body.gameActive .main .answerBtn:nth-child(6) { animation-delay: 0.22s; }

  /* Answer buttons at bottom in expanded instrument view */
  body.gameActive .main.instrument-view-expanded .answerGrid {
    position: static !important;
    bottom: auto !important;
    left: auto !important;
    right: auto !important;
    z-index: auto !important;
    width: 100% !important;
    grid-area: unset !important;
    grid-template-columns: repeat(6, 1fr) !important;
    grid-auto-rows: auto !important;
    height: auto !important;
    justify-self: unset !important;
    align-content: unset !important;
    padding: 6px 6px 8px !important;
    gap: 4px !important;
    margin: 0 !important;
    background: transparent !important;
    border-top: none !important;
  }

  body.gameActive .main.instrument-view-expanded .answerBtn {
    animation: none !important;
    min-height: 44px !important;
    padding: 4px !important;
    font-size: clamp(16px, 2.5vw, 20px) !important;
  }

  body.gameActive .main.instrument-guitar,
  body.gameActive .main.instrument-bass {
    grid-template-columns: minmax(0, 1fr);
    grid-template-rows:
      minmax(0, calc(var(--layout-question-pct) * 1%))
      minmax(0, calc(var(--layout-instrument-pct) * 1%))
      minmax(0, calc(var(--layout-answer-pct) * 1%));
    grid-template-areas:
      "question"
      "instrument"
      "answers";
  }

  body.gameActive .main.instrument-guitar .answerGrid,
  body.gameActive .main.instrument-bass .answerGrid {
    justify-self: stretch;
    width: 100%;
    height: 100%;
    padding-right: 0;
    grid-template-columns: repeat(6, minmax(0, 1fr));
    grid-auto-rows: minmax(0, 1fr);
    gap: 6px;
  }

  body.gameActive .main.instrument-guitar .answerBtn,
  body.gameActive .main.instrument-bass .answerBtn {
    min-height: 0;
    font-size: clamp(13px, 2.8vw, 24px);
  }

  body.gameActive .main.instrument-guitar.no-answer-grid,
  body.gameActive .main.instrument-bass.no-answer-grid,
  body.gameActive .main.instrument-piano.no-answer-grid {
    grid-template-columns: minmax(0, 1fr);
    grid-template-rows:
      minmax(0, calc(var(--layout-question-pct) * 1%))
      minmax(0, calc((var(--layout-instrument-pct) + var(--layout-answer-pct)) * 1%));
    grid-template-areas:
      "question"
      "instrument";
  }

  body.gameActive .main.instrument-guitar.no-answer-grid .guitarContainer,
  body.gameActive .main.instrument-bass.no-answer-grid .bassContainer,
  body.gameActive .main.instrument-piano.no-answer-grid .pianoContainer {
    align-self: stretch;
    justify-self: stretch;
  }

  body.gameActive .main.no-answer-grid .questionStats {
    display: none;
  }

  body.gameActive .main.no-answer-grid .bonusButton {
    display: none;
  }

  body.gameActive .main.instrument-piano.no-answer-grid .questionBox {
    justify-content: flex-start;
    padding-top: 0.85rem;
    padding-bottom: 0.85rem;
  }

  body.gameActive .main.instrument-piano.no-answer-grid .questionText {
    display: none;
  }

  body.gameActive .main.instrument-piano.no-answer-grid .questionSuggestions {
    margin-top: 0;
    max-height: 100%;
  }

  body.gameActive .main .bonusButton {
    position: absolute;
    top: 10px;
    left: 74px;
    right: auto;
    bottom: auto;
    margin-top: 0;
    align-self: auto;
    z-index: 1;
  }

  .main.pianoMode .bonusButton {
    position: absolute;
    top: 10px;
    left: 74px;
    right: auto;
    bottom: auto;
    margin-top: 0;
    align-self: auto;
    flex-shrink: 0;
    z-index: 1;
  }

  /* Scale up note labels in landscape expanded view */
  .guitarFretboard.showNoteLabels .guitarPosition::after {
    font-size: 14px;
  }

  .bassFretboard.showNoteLabels .bassPosition::after {
    font-size: 14px;
  }

  .pianoKeyboard.showNoteLabels .pianoKey::before {
    font-size: 10px;
  }

  .pianoKeyboard.showNoteLabels .pianoKey.black::before {
    font-size: 8px;
  }

  body.gameOverVisible .app {
    padding: 10px 10px 10px var(--landscape-rail-offset);
  }

  body.gameOverVisible .main {
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: visible;
  }

  body.gameOverVisible .main .questionBoxWrap {
    width: min(100%, 960px);
    min-height: 0;
  }

  body.gameOverVisible .main .questionBox {
    min-height: min(78vh, 680px);
    padding: 3.8rem 1rem 1rem;
  }

  body.gameOverVisible .main .questionText {
    font-size: clamp(1.25rem, 3vw, 2.4rem);
  }

  body.gameOverVisible .main .questionSuggestions {
    max-height: min(42vh, 300px);
    padding-inline: 0;
  }
}

@keyframes answerSlideLandscape {
  from {
    opacity: 0;
    transform: translate(-18px, 14px);
  }
  to {
    opacity: 1;
    transform: translate(0, 0);
  }
}

/* Ensure no overflow on mobile portrait */
@media (max-width: 420px){
  .keyToggles{ grid-template-columns: repeat(3, 1fr); }
  .btn{ padding: 10px 10px; }
}

@media (max-width: 700px) {
  .questionBox.gameOverLayout {
    padding-top: 4rem;
    min-height: min(76vh, 720px);
  }

  .questionBox.gameOverLayout .questionText {
    max-width: 100%;
    font-size: clamp(1.35rem, 7vw, 2.35rem);
  }

  .questionBox.gameOverLayout .questionSuggestions {
    max-height: min(52vh, 420px);
  }

  .questionBox.gameOverLayout .questionSuggestions .practiceStep {
    gap: 0.75rem;
    padding: 0.8rem;
  }

  .questionBox.gameOverLayout .questionSuggestions .stepContent h4 {
    font-size: 0.92rem;
  }

  .questionBox.gameOverLayout .questionSuggestions .stepContent p {
    font-size: 0.82rem;
    line-height: 1.4;
  }

  .questionBox.gameOverLayout .questionSuggestions .btnApply {
    width: 100%;
  }
}

@media (max-width: 700px) and (orientation: portrait) {
  .app {
    padding-top: calc(max(28px, env(safe-area-inset-top)) + 56px);
    padding-right: max(24px, env(safe-area-inset-right));
    padding-bottom: max(24px, env(safe-area-inset-bottom));
    padding-left: max(24px, env(safe-area-inset-left));
  }
}

/* ========== Settings Modal ========== */
.modalOverlay{
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.7);
  backdrop-filter: blur(8px);
  z-index: 10002;
  display: flex;
  align-items: center;
  justify-content: center;
}

.modalOverlay[hidden]{
  display: none;
}

.modal{
  position: relative;
  top: auto;
  left: auto;
  transform: none;
  width: 92%;
  max-width: 520px;
  max-height: 92vh;
  background: rgba(15,20,35,0.97);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: 0 20px 60px rgba(0,0,0,0.7);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.modal[hidden]{
  display: none;
}
.confirmModal {
  max-width: 400px;
}

.confirmMessage {
  font-size: 1rem;
  color: var(--text);
  margin: 0;
  line-height: 1.5;
  text-align: center;
}
.modalHeader{
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 1.25rem;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}
.modalHeader h2{
  margin: 0;
  font-size: 1.25rem;
  font-weight: 700;
}

.modalBody{
  padding: 1.5rem 1.25rem;
  overflow-y: auto;
  flex: 1;
}

.modalFooter{
  padding: 1rem 1.25rem;
  border-top: 1px solid rgba(255,255,255,0.1);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.75rem;
}

.modalActions {
  display: flex;
  gap: 0.5rem;
  align-items: center;
}

.settingGroup{
  margin-bottom: 1.75rem;
}
.settingGroup:last-child{ margin-bottom: 0; }

.settingLabel{
  font-size: 0.875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-secondary);
  margin: 0 0 0.75rem;
}

.settingHint{
  font-size: 0.8rem;
  color: var(--text-tertiary);
  margin: -0.5rem 0 0.75rem;
  line-height: 1.4;
}

/* Key toggles grid */
.keyToggles{
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.5rem;
}

/* Degree toggles grid */
.degreeToggles{
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 0.5rem;
}

.keyBtn{
  appearance: none;
  border: 1px solid rgba(255,255,255,0.12);
  background: rgba(255,255,255,0.04);
  color: var(--text);
  padding: 0.75rem;
  border-radius: 8px;
  font-weight: 700;
  font-size: 0.95rem;
  cursor: pointer;
  transition: all 0.15s ease;
}
.keyBtn:hover{ background: rgba(255,255,255,0.08); }
.keyBtn[aria-pressed="true"]{
  background: linear-gradient(180deg, rgba(64,230,160,0.20), rgba(64,230,160,0.10));
  border-color: rgba(64,230,160,0.35);
}

/* Slider row */
.sliderRow{
  display: flex;
  align-items: center;
  gap: 1rem;
}

.slider{
  appearance: none;
  flex: 1;
  height: 6px;
  background: rgba(255,255,255,0.1);
  border-radius: 999px;
  outline: none;
  cursor: pointer;
}
.slider::-webkit-slider-thumb{
  appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 999px;
  background: rgba(64,230,160,0.9);
  border: 2px solid rgba(255,255,255,0.2);
  cursor: pointer;
  transition: all 0.15s ease;
}
.slider::-webkit-slider-thumb:hover{
  background: rgba(64,230,160,1);
  transform: scale(1.1);
}
.slider::-moz-range-thumb{
  width: 18px;
  height: 18px;
  border-radius: 999px;
  background: rgba(64,230,160,0.9);
  border: 2px solid rgba(255,255,255,0.2);
  cursor: pointer;
  transition: all 0.15s ease;
}
.slider::-moz-range-thumb:hover{
  background: rgba(64,230,160,1);
  transform: scale(1.1);
}

.sliderValue{
  font-weight: 700;
  font-size: 1rem;
  color: var(--text);
  min-width: 3rem;
  text-align: right;
  font-variant-numeric: tabular-nums;
}

/* Audio Mixer */
.mixerControls {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.mixerRow {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.mixerLabel {
  font-size: 0.9rem;
  color: var(--text);
  min-width: 120px;
  font-weight: 500;
}

.mixerValue {
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--text);
  min-width: 3rem;
  text-align: right;
  font-variant-numeric: tabular-nums;
}

/* Segmented control */
.segmented{
  display: flex;
  gap: 0.5rem;
}

.segBtn{
  appearance: none;
  flex: 1;
  border: 1px solid rgba(255,255,255,0.12);
  background: rgba(255,255,255,0.04);
  color: var(--text);
  padding: 0.75rem 1rem;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
  transition: all 0.15s ease;
}
.segBtn:hover{ background: rgba(255,255,255,0.08); }
.segBtn[aria-checked="true"]{
  background: linear-gradient(180deg, rgba(64,230,160,0.20), rgba(64,230,160,0.10));
  border-color: rgba(64,230,160,0.35);
}

/* Game mode selector with hints */
.gameModeSelector {
  flex-direction: column;
  gap: 0.75rem;
}

.gameModeSelector .segBtn {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.25rem;
  padding: 1rem;
  text-align: left;
}

.segBtnLabel {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text);
}

.segBtnHint {
  font-weight: 400;
  font-size: 0.8rem;
  color: var(--text-secondary);
  opacity: 0.7;
}

.gameModeSelector .segBtn[aria-checked="true"] .segBtnLabel {
  color: #40e6a0;
}

/* Toggle row */
.toggleRow{
  display: flex;
  gap: 0.75rem;
}

.toggleBtn{
  appearance: none;
  flex: 1;
  border: 1px solid rgba(255,255,255,0.12);
  background: rgba(255,255,255,0.04);
  color: var(--text);
  padding: 0.75rem 1rem;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
  transition: all 0.15s ease;
}
.toggleBtn:hover{ background: rgba(255,255,255,0.08); }
.toggleBtn[aria-pressed="true"]{
  background: linear-gradient(180deg, rgba(64,230,160,0.20), rgba(64,230,160,0.10));
  border-color: rgba(64,230,160,0.35);
}

/* Stats Modal */
.statsModal {
  max-width: 700px;
  max-height: 85vh;
  overflow-y: auto;
}

.statsContent {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.statsSummary {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 1rem;
}

.statCard {
  background: linear-gradient(180deg, rgba(255,255,255,0.08), rgba(255,255,255,0.04));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
  text-align: center;
}

.statValue {
  font-size: 2rem;
  font-weight: 800;
  color: #40e6a0;
  margin-bottom: 0.25rem;
}

.statLabel {
  font-size: 0.875rem;
  color: var(--text-tertiary);
  font-weight: 500;
}

.statsSection {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.statsSubtitle {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--text);
  margin: 0;
}

.statsTable table {
  width: 100%;
  border-collapse: collapse;
  background: linear-gradient(180deg, rgba(255,255,255,0.05), rgba(255,255,255,0.02));
  border-radius: var(--radius);
  overflow: hidden;
}

.statsTable th {
  background: rgba(255,255,255,0.08);
  padding: 0.75rem;
  text-align: left;
  font-weight: 600;
  font-size: 0.875rem;
  color: var(--text-tertiary);
  border-bottom: 1px solid var(--border);
}

.statsTable td {
  padding: 0.75rem;
  border-bottom: 1px solid rgba(255,255,255,0.05);
  color: var(--text);
}

.statsTable tr:last-child td {
  border-bottom: none;
}

.statsHelp {
  background: linear-gradient(180deg, rgba(255,180,80,0.15), rgba(255,180,80,0.08));
  border: 1px solid rgba(255,180,80,0.3);
  border-radius: var(--radius);
  padding: 1rem;
}

.statsHelp ul {
  margin: 0;
  padding-left: 1.5rem;
}

.statsHelp li {
  margin: 0.5rem 0;
  color: var(--text);
}

.statsHelp p {
  margin: 0;
  color: var(--text);
}

.btnDanger {
  background: linear-gradient(180deg, rgba(255,80,80,0.25), rgba(255,80,80,0.15));
  border: 1px solid rgba(255,80,80,0.4);
  color: #ff8080;
}

.btnDanger:hover {
  background: linear-gradient(180deg, rgba(255,80,80,0.35), rgba(255,80,80,0.25));
  border-color: rgba(255,80,80,0.6);
}

/* Practice Plan */
.statsPlan {
  background: linear-gradient(180deg, rgba(100,150,255,0.12), rgba(100,150,255,0.06));
  border: 1px solid rgba(100,150,255,0.3);
  border-radius: var(--radius);
  padding: 1rem;
}

.practiceSteps {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.practiceStep {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  background: rgba(0, 0, 0, 0.2);
  padding: 1rem;
  border-radius: 8px;
  border: 1px solid rgba(255,255,255,0.05);
}

.stepNumber {
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: linear-gradient(180deg, rgba(100,150,255,0.3), rgba(100,150,255,0.2));
  border: 1px solid rgba(100,150,255,0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.9rem;
  color: #6c9fff;
}

.stepContent {
  flex: 1;
}

.stepContent h4 {
  margin: 0 0 0.5rem 0;
  font-size: 1rem;
  font-weight: 700;
  color: var(--text);
}

.stepContent p {
  margin: 0.5rem 0;
  color: var(--text-secondary);
  line-height: 1.5;
}

.stepContent ul {
  margin: 0.5rem 0;
  padding-left: 1.5rem;
}

.stepContent li {
  margin: 0.25rem 0;
  color: var(--text);
}

.btnApply {
  margin-top: 0.75rem;
  background: linear-gradient(180deg, rgba(100,200,100,0.25), rgba(100,200,100,0.15));
  border: 1px solid rgba(100,200,100,0.4);
  color: #6cf96c;
  font-size: 0.875rem;
  padding: 0.5rem 1rem;
}

.btnApply:hover {
  background: linear-gradient(180deg, rgba(100,200,100,0.35), rgba(100,200,100,0.25));
  border-color: rgba(100,200,100,0.6);
  transform: translateY(-1px);
}

/* Practice Settings Confirmation Modal */
.practiceSettingsModal {
  max-width: 500px;
}

.practiceSettingsContent {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  text-align: center;
}

.practiceSettingsContent > p {
  margin: 0;
  color: var(--text);
  font-size: 1rem;
  line-height: 1.6;
}

.settingsApplied {
  background: linear-gradient(180deg, rgba(100,200,100,0.15), rgba(100,200,100,0.08));
  border: 1px solid rgba(100,200,100,0.3);
  border-radius: var(--radius);
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.settingAppliedItem {
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--text);
  font-size: 0.95rem;
}

.settingAppliedItem strong {
  color: var(--text-secondary);
  font-weight: 600;
}

.settingAppliedItem span {
  color: #6cf96c;
  font-weight: 600;
}

.practiceHint {
  color: var(--text-tertiary) !important;
  font-size: 0.875rem !important;
  font-style: italic;
}

/* ==================== */
/* Piano Visualization  */
/* ==================== */

.pianoContainer {
  display: block;
  width: 100%;
  margin: 12px 0;
  padding: 16px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: 0 4px 12px rgba(0,0,0,0.3);
  position: relative;
  z-index: 50;
}

.instrumentExpandBtn {
  appearance: none;
  position: absolute;
  top: 14px;
  right: 22px;
  width: 34px;
  height: 34px;
  border-radius: 10px;
  border: 1px solid rgba(255,255,255,0.22);
  background: rgba(0,0,0,0.45);
  color: var(--text);
  font-size: 18px;
  cursor: pointer;
  z-index: 120;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
}

.instrumentExpandBtn:hover {
  border-color: rgba(255,255,255,0.35);
  transform: translateY(-1px);
}

.instrumentExpandBtn[aria-pressed="true"] {
  background: rgba(64,230,160,0.2);
  border-color: rgba(64,230,160,0.5);
}

.instrumentNotesBtn {
  appearance: none;
  position: absolute;
  top: 10px;
  right: 57px;
  width: 34px;
  height: 34px;
  border-radius: 10px;
  border: 1px solid rgba(255,255,255,0.22);
  background: rgba(0,0,0,0.45);
  color: var(--text);
  font-size: 16px;
  font-weight: 800;
  cursor: pointer;
  z-index: 120;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
}

.instrumentNotesBtn[hidden] {
  display: none !important;
}

.instrumentNotesBtn:hover {
  border-color: rgba(255,255,255,0.35);
  transform: translateY(-1px);
}

.instrumentNotesBtn[aria-pressed="true"] {
  background: rgba(100,150,255,0.24);
  border-color: rgba(100,150,255,0.55);
}

.instrumentQuestionOverlay {
  position: absolute;
  top: 8px;
  left: 8px;
  right: 8px;
  text-align: center;
  font-size: clamp(0.62rem, 1.35vw, 0.85rem);
  font-weight: 700;
  line-height: 1.15;
  color: var(--text);
  text-shadow: 0 1px 3px rgba(0,0,0,0.55);
  background: rgba(8, 16, 32, 0.72);
  border: 1px solid rgba(255,255,255,0.14);
  border-radius: 8px;
  padding: 4px 8px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  z-index: 130;
  pointer-events: none;
}

.main.instrument-view-expanded .questionBoxWrap {
  display: none !important;
}

/* Expanded instrument: answer grid lives inside the container */

.pianoContainer.instrumentExpanded .answerGrid,
.guitarContainer.instrumentExpanded .answerGrid,
.bassContainer.instrumentExpanded .answerGrid {
  position: relative !important;
  z-index: 200 !important;
  width: 100% !important;
  display: grid !important;
  grid-template-columns: repeat(6, 1fr) !important;
  grid-auto-rows: auto !important;
  gap: 4px !important;
  padding: 6px !important;
  margin: 0 !important;
  height: auto !important;
  background: transparent !important;
  border-top: none !important;
  flex: 0 0 auto;
  pointer-events: auto !important;
}

.guitarContainer.instrumentExpanded .answerGrid,
.bassContainer.instrumentExpanded .answerGrid {
  position: absolute !important;
  left: 6px !important;
  right: 6px !important;
  bottom: 6px !important;
  width: auto !important;
  margin-top: 0 !important;
}

.pianoContainer.instrumentExpanded .answerBtn,
.guitarContainer.instrumentExpanded .answerBtn,
.bassContainer.instrumentExpanded .answerBtn {
  min-height: 44px !important;
  padding: 4px !important;
  font-size: clamp(16px, 2.5vw, 20px) !important;
  animation: none !important;
  pointer-events: auto !important;
  z-index: 201 !important;
}

.pianoContainer.instrumentExpanded .answerBtn:disabled,
.guitarContainer.instrumentExpanded .answerBtn:disabled,
.bassContainer.instrumentExpanded .answerBtn:disabled {
  opacity: 1 !important;
}

.pianoContainer.instrumentExpanded .instrumentExpandBtn,
.guitarContainer.instrumentExpanded .instrumentExpandBtn,
.bassContainer.instrumentExpanded .instrumentExpandBtn,
.pianoContainer.instrumentExpanded .instrumentNotesBtn,
.guitarContainer.instrumentExpanded .instrumentNotesBtn,
.bassContainer.instrumentExpanded .instrumentNotesBtn {
  top: 6px;
  z-index: 180;
}

.pianoContainer.instrumentExpanded .instrumentQuestionOverlay,
.guitarContainer.instrumentExpanded .instrumentQuestionOverlay,
.bassContainer.instrumentExpanded .instrumentQuestionOverlay {
  top: 8px;
  right: 96px;
  z-index: 170;
}

.guitarContainer {
  display: block;
  width: 100%;
  max-width: none;
  aspect-ratio: 4 / 1;
  margin: 12px 0;
  padding: 16px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: 0 4px 12px rgba(0,0,0,0.3);
  position: relative;
  z-index: 50;
}

.guitarContainer.instrumentExpanded,
.bassContainer.instrumentExpanded,
.pianoContainer.instrumentExpanded {
  position: fixed;
  top: 0;
  left: var(--instrument-expanded-left);
  right: 0;
  bottom: 0;
  width: auto;
  margin: 0;
  padding: 6px;
  z-index: 9998;
  background: #070A12;
  border: none;
  border-radius: 0;
  box-shadow: none;
  display: flex;
  flex-direction: column;
  align-items: stretch;
  justify-content: flex-start;
  overflow: hidden;
}

.pianoContainer.instrumentExpanded {
  right: 12px;
}

.pianoContainer.instrumentExpanded .pianoKeyboardWrap {
  flex: 1 1 auto;
  width: 100%;
  min-width: 0;
  max-width: 100%;
  overflow-x: scroll;
  overflow-y: hidden;
  -webkit-overflow-scrolling: touch;
  overscroll-behavior-x: contain;
  touch-action: pan-x;
  margin-top: 44px;
  min-height: 80px;
  display: flex;
  align-items: center;
}

.pianoContainer.instrumentExpanded .pianoKeyboard {
  width: max(280vw, 2400px);
  min-width: max(280vw, 2400px);
  height: clamp(100px, 30vmin, 160px);
  min-height: 100px;
  max-height: unset;
  aspect-ratio: unset;
  margin-left: 8px;
  margin-right: 8px;
  overflow: visible;
  flex: 0 0 auto;
}

.pianoContainer.instrumentExpanded .pianoKeyboard,
.pianoContainer.instrumentExpanded .pianoKey {
  touch-action: pan-x;
}

.guitarContainer.instrumentExpanded .guitarFretboard {
  width: 100%;
  aspect-ratio: auto;
  flex: 1 1 0;
  min-height: 0;
  max-height: none;
  margin-top: 44px;
  margin-bottom: 0;
}

.bassContainer.instrumentExpanded .bassFretboard {
  width: 100%;
  aspect-ratio: auto;
  flex: 1 1 0;
  min-height: 0;
  max-height: none;
  margin-top: 44px;
  margin-bottom: 0;
}

.guitarContainer.instrumentExpanded .guitarInlay,
.bassContainer.instrumentExpanded .bassInlay {
  top: 95%;
}

.guitarContainer[hidden] {
  display: none !important;
}

.guitarFretboard {
  position: relative;
  height: 437px;
  width: 100%;
  aspect-ratio: 10 / 3;
  margin: 0 auto;
  border-radius: 10px;
  overflow-x: auto;
  overflow-y: hidden;
  background:
    linear-gradient(180deg, rgba(0,0,0,0.18), rgba(0,0,0,0.3)),
    linear-gradient(90deg, #6c4023, #8b5a2b 45%, #7a4d24 100%);
  box-shadow:
    inset 0 0 0 1px rgba(0,0,0,0.35),
    inset 0 1px 12px rgba(255,220,160,0.08),
    inset 0 -6px 16px rgba(0,0,0,0.35);
}

.guitarNeck {
  position: relative;
  height: 100%;
  min-width: 100%;
}

.guitarNut {
  position: absolute;
  left: 0;
  top: 0;
  width: 7px;
  height: 100%;
  background: linear-gradient(90deg, #ece6d8, #c9c1ad);
  box-shadow: 1px 0 3px rgba(0,0,0,0.35);
  z-index: 15;
}

.guitarFret {
  position: absolute;
  top: 0;
  width: 2px;
  height: 100%;
  background: linear-gradient(180deg, #d9d9d9, #9a9a9a, #d6d6d6);
  box-shadow: 0 0 2px rgba(255,255,255,0.35);
  z-index: 10;
}

.guitarString {
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, #f6f6f6, #bdbdbd, #ececec);
  box-shadow: 0 0 2px rgba(255,255,255,0.45);
  z-index: 20;
}

.guitarString.s1 { height: 1px; opacity: 0.85; }
.guitarString.s2 { height: 1.2px; opacity: 0.87; }
.guitarString.s3 { height: 1.5px; opacity: 0.9; }
.guitarString.s4 { height: 1.8px; opacity: 0.92; }
.guitarString.s5 { height: 2.2px; opacity: 0.95; }
.guitarString.s6 { height: 2.8px; opacity: 1; }

.guitarInlay {
  position: absolute;
  top: 97%;
  width: 9px;
  height: 9px;
  border-radius: 999px;
  transform: translate(-50%, -50%);
  background: radial-gradient(circle at 30% 30%, rgba(255,255,255,0.55), rgba(220,220,220,0.28) 60%, rgba(150,150,150,0.15));
  box-shadow: 0 0 2px rgba(255,255,255,0.12);
  z-index: 12;
  opacity: 0.6;
}

.guitarInlay.double.top {
  top: 97%;
  transform: translate(-75%, -50%);
}

.guitarInlay.double.bottom {
  top: 97%;
  transform: translate(-25%, -50%);
}

.guitarPosition {
  position: absolute;
  width: calc(var(--guitar-note-base-size) * var(--note-position-scale));
  height: calc(var(--guitar-note-base-size) * var(--note-position-scale));
  border-radius: 999px;
  transform: translate(-50%, -50%);
  z-index: 30;
  border: 1px solid rgba(0,0,0,0.35);
  transition: all 0.15s ease;
}

.guitarPosition.shaded {
  background: rgba(0,0,0,0.06);
  box-shadow: 0 0 2px rgba(0,0,0,0.06);
}

.guitarPosition.inScale {
  background: rgba(74, 222, 128, 0.72);
  box-shadow: 0 0 8px rgba(74, 222, 128, 0.45);
}

.guitarPosition.questionNote {
  background: rgba(251, 191, 36, 0.95);
  box-shadow: 0 0 10px rgba(251, 191, 36, 0.7);
  animation: pulse-question 1.5s ease-in-out infinite;
}

.guitarPosition.chordSelected,
.bassPosition.chordSelected {
  background: rgba(56, 189, 248, 0.95) !important;
  border-color: rgba(255,255,255,0.9) !important;
  box-shadow: 0 0 14px rgba(56, 189, 248, 0.9) !important;
}

.guitarPosition.wrongSelection,
.bassPosition.wrongSelection,
.pianoKey.wrongSelection {
  background: rgba(239, 68, 68, 0.9) !important;
  box-shadow: 0 0 0 2px rgba(239, 68, 68, 0.35) !important;
  border-color: rgba(255, 255, 255, 0.75) !important;
}

.guitarPosition.correctSelection,
.bassPosition.correctSelection,
.pianoKey.correctSelection {
  background: rgba(34, 197, 94, 0.92) !important;
  box-shadow: 0 0 0 2px rgba(34, 197, 94, 0.3) !important;
  border-color: rgba(255, 255, 255, 0.82) !important;
  opacity: 1 !important;
  filter: none !important;
}

.pianoKey.white.correctSelection {
  background: linear-gradient(180deg, #77f0a7 0%, #45d883 55%, #23b863 100%) !important;
  color: #073b1f !important;
}

.pianoKey.black.correctSelection {
  background: linear-gradient(180deg, #43d47e 0%, #1f9e57 55%, #12733c 100%) !important;
  color: #fff !important;
}

.pianoKey.correctSelection::after {
  display: none !important;
}

.guitarPosition.correctSelection::before,
.bassPosition.correctSelection::before,
.pianoKey.correctSelection::before {
  content: '✓';
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  color: rgba(255, 255, 255, 0.98);
  font-weight: 900;
  font-size: clamp(12px, 1.7vw, 18px);
  text-shadow: 0 1px 3px rgba(0,0,0,0.7);
  z-index: 120;
  pointer-events: none;
}

.guitarPosition.wrongSelection::before,
.bassPosition.wrongSelection::before,
.pianoKey.wrongSelection::before {
  content: '✕';
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  color: rgba(255, 255, 255, 0.96);
  font-weight: 900;
  font-size: clamp(12px, 1.7vw, 18px);
  text-shadow: 0 1px 3px rgba(0,0,0,0.7);
  z-index: 120;
  pointer-events: none;
}

.guitarFretboard.showNoteLabels .guitarPosition[data-scale-label]:not([data-scale-label=""])::after {
  content: attr(data-scale-label);
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.1em;
  height: 2.1em;
  font-size: clamp(10px, 1.5vw, 18px);
  font-weight: 800;
  color: rgba(255,255,255,0.95);
  line-height: 1;
  white-space: nowrap;
  border-radius: 999px;
  background: rgba(0, 0, 0, 0.72);
  box-shadow: 0 2px 6px rgba(0,0,0,0.28);
  text-shadow: 0 1px 3px rgba(0,0,0,0.75);
  pointer-events: none;
  z-index: 130;
}

.guitarFretboard.showDegreeLabels .guitarPosition[data-degree]:not([data-degree=""])::after {
  content: attr(data-degree);
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.1em;
  height: 2.1em;
  font-size: clamp(10px, 1.5vw, 18px);
  font-weight: 800;
  color: rgba(255,255,255,0.95);
  line-height: 1;
  white-space: nowrap;
  border-radius: 999px;
  background: rgba(0, 0, 0, 0.72);
  box-shadow: 0 2px 6px rgba(0,0,0,0.28);
  text-shadow: 0 1px 3px rgba(0,0,0,0.75);
  pointer-events: none;
  z-index: 130;
}

.guitarPosition[data-fret="0"] {
  left: 14px !important;
  transform: translate(0, -50%);
}

.guitarFretboard.showNoteLabels .guitarPosition[data-fret="0"][data-scale-label]:not([data-scale-label=""])::before {
  content: "";
  position: absolute;
  left: -7px;
  top: 50%;
  transform: translateY(-50%);
  width: 0;
  height: 0;
  border-top: 5px solid transparent;
  border-bottom: 5px solid transparent;
  border-right: 7px solid rgba(0, 0, 0, 0.72);
  pointer-events: none;
  z-index: 129;
}

.bassContainer {
  display: block;
  width: 100%;
  max-width: none;
  aspect-ratio: 18 / 5;
  margin: 12px 0;
  padding: 16px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: 0 4px 12px rgba(0,0,0,0.3);
  position: relative;
  z-index: 50;
}

.bassContainer > svg,
.bassContainer > canvas,
.bassContainer > img,
.bassContainer .bassUI {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.bassContainer[hidden] {
  display: none !important;
}

.bassFretboard {
  position: relative;
  height: 364px;
  width: 100%;
  aspect-ratio: 4 / 1;
  margin: 0 auto;
  border-radius: 10px;
  overflow-x: auto;
  overflow-y: hidden;
  background:
    linear-gradient(180deg, rgba(0,0,0,0.18), rgba(0,0,0,0.3)),
    linear-gradient(90deg, #5c3d1f, #8b5a2b 45%, #6c4423 100%);
  box-shadow:
    inset 0 0 0 1px rgba(0,0,0,0.35),
    inset 0 1px 12px rgba(255,220,160,0.08),
    inset 0 -6px 16px rgba(0,0,0,0.35);
}

.bassNeck {
  position: relative;
  height: 100%;
  min-width: 100%;
}

.bassNut {
  position: absolute;
  left: 0;
  top: 0;
  width: 7px;
  height: 100%;
  background: linear-gradient(90deg, #ece6d8, #c9c1ad);
  box-shadow: 1px 0 3px rgba(0,0,0,0.35);
  z-index: 15;
}

.bassFret {
  position: absolute;
  top: 0;
  width: 2px;
  height: 100%;
  background: linear-gradient(180deg, #d9d9d9, #9a9a9a, #d6d6d6);
  box-shadow: 0 0 2px rgba(255,255,255,0.35);
  z-index: 10;
}

.bassString {
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, #f6f6f6, #bdbdbd, #ececec);
  box-shadow: 0 0 2px rgba(255,255,255,0.45);
  transform: translateY(-50%);
  z-index: 20;
}

.bassString.s1 { height: 1px; opacity: 0.85; }
.bassString.s2 { height: 1.2px; opacity: 0.87; }
.bassString.s3 { height: 1.5px; opacity: 0.9; }
.bassString.s4 { height: 1.8px; opacity: 0.92; }

.bassInlay {
  position: absolute;
  top: 97%;
  width: 9px;
  height: 9px;
  border-radius: 999px;
  transform: translate(-50%, -50%);
  background: radial-gradient(circle at 30% 30%, rgba(255,255,255,0.55), rgba(220,220,220,0.28) 60%, rgba(150,150,150,0.15));
  box-shadow: 0 0 2px rgba(255,255,255,0.12);
  z-index: 12;
  opacity: 0.6;
}

.bassPosition {
  position: absolute;
  width: calc(var(--bass-note-base-size) * var(--note-position-scale));
  height: calc(var(--bass-note-base-size) * var(--note-position-scale));
  border-radius: 999px;
  transform: translate(-50%, -50%);
  z-index: 30;
  border: 1px solid rgba(0,0,0,0.35);
  transition: all 0.15s ease;
}

.bassPosition.shaded {
  background: rgba(0,0,0,0.06);
  box-shadow: 0 0 2px rgba(0,0,0,0.06);
}

.bassPosition.inScale {
  background: rgba(74, 222, 128, 0.72);
  box-shadow: 0 0 8px rgba(74, 222, 128, 0.45);
}

.bassPosition.questionNote {
  background: rgba(251, 191, 36, 0.95);
  box-shadow: 0 0 10px rgba(251, 191, 36, 0.7);
  animation: pulse-question 1.5s ease-in-out infinite;
}

.bassFretboard.showNoteLabels .bassPosition[data-scale-label]:not([data-scale-label=""])::after {
  content: attr(data-scale-label);
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.1em;
  height: 2.1em;
  font-size: clamp(10px, 1.5vw, 18px);
  font-weight: 800;
  color: rgba(255,255,255,0.95);
  line-height: 1;
  white-space: nowrap;
  border-radius: 999px;
  background: rgba(0, 0, 0, 0.72);
  box-shadow: 0 2px 6px rgba(0,0,0,0.28);
  text-shadow: 0 1px 3px rgba(0,0,0,0.75);
  pointer-events: none;
  z-index: 130;
}

.bassFretboard.showDegreeLabels .bassPosition[data-degree]:not([data-degree=""])::after {
  content: attr(data-degree);
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.1em;
  height: 2.1em;
  font-size: clamp(10px, 1.5vw, 18px);
  font-weight: 800;
  color: rgba(255,255,255,0.95);
  line-height: 1;
  white-space: nowrap;
  border-radius: 999px;
  background: rgba(0, 0, 0, 0.72);
  box-shadow: 0 2px 6px rgba(0,0,0,0.28);
  text-shadow: 0 1px 3px rgba(0,0,0,0.75);
  pointer-events: none;
  z-index: 130;
}

.bassPosition[data-fret="0"] {
  left: 14px !important;
  transform: translate(0, -50%);
}

.bassFretboard.showNoteLabels .bassPosition[data-fret="0"][data-scale-label]:not([data-scale-label=""])::before {
  content: "";
  position: absolute;
  left: -7px;
  top: 50%;
  transform: translateY(-50%);
  width: 0;
  height: 0;
  border-top: 5px solid transparent;
  border-bottom: 5px solid transparent;
  border-right: 7px solid rgba(0, 0, 0, 0.72);
  pointer-events: none;
  z-index: 129;
}

.pianoContainer[hidden] {
  display: none !important;
}

.pianoKeyboardWrap {
  width: 100%;
  overflow-x: auto;
  overflow-y: hidden;
  -webkit-overflow-scrolling: touch;
  touch-action: pan-x;
}

.pianoKeyboard {
  position: relative;
  height: 140px;
  width: max(100%, 820px);
  min-width: 820px;
  aspect-ratio: 7 / 1;
  margin: 0 auto;
  background: linear-gradient(180deg, rgba(10,10,15,0.8), rgba(5,5,10,0.9));
  border-radius: 8px;
  overflow: visible;
  box-shadow: inset 0 2px 8px rgba(0,0,0,0.5);
  min-height: 140px;
  z-index: 50;
  display: block;
}

.pianoKey {
  position: absolute;
  cursor: pointer;
  border-radius: 0 0 4px 4px;
  transition: all 0.15s ease;
  user-select: none;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  font-size: 0.7rem;
  font-weight: 600;
  padding-bottom: 6px;
  box-sizing: border-box;
}

.pianoKey.white {
  background: linear-gradient(180deg, #ffffff 0%, #f5f5f5 50%, #e0e0e0 100%);
  border: 2px solid #2a2a2a;
  border-top: none;
  box-shadow: 
    0 3px 6px rgba(0,0,0,0.4),
    inset 0 1px 0 rgba(255,255,255,0.8),
    inset 0 -3px 6px rgba(0,0,0,0.15);
  color: #333;
  z-index: 10;
  pointer-events: auto;
  visibility: visible;
}

.pianoKey.white:hover {
  background: linear-gradient(180deg, #f8f8f8 0%, #ececec 50%, #d8d8d8 100%);
  z-index: 11;
}

.pianoKey.white:active {
  background: linear-gradient(180deg, #e8e8e8 0%, #d8d8d8 50%, #c8c8c8 100%);
  box-shadow: 
    0 1px 3px rgba(0,0,0,0.5),
    inset 0 3px 8px rgba(0,0,0,0.3);
  z-index: 11;
}

.pianoKey.black {
  background: linear-gradient(180deg, #3a3a3a 0%, #1a1a1a 50%, #000000 100%);
  border: 2px solid #000;
  border-bottom: 2px solid #4a4a4a;
  box-shadow: 
    0 4px 8px rgba(0,0,0,0.7),
    inset 0 1px 2px rgba(255,255,255,0.15),
    inset 0 -1px 3px rgba(0,0,0,0.5);
  color: #fff;
  z-index: 20;
  pointer-events: auto;
  visibility: visible;
}

.pianoKey.black:hover {
  background: linear-gradient(180deg, #454545 0%, #252525 50%, #0a0a0a 100%);
  z-index: 21;
}

.pianoKey.black:active {
  background: linear-gradient(180deg, #2a2a2a 0%, #0a0a0a 50%, #000000 100%);
  box-shadow: 
    0 2px 4px rgba(0,0,0,0.9),
    inset 0 2px 6px rgba(0,0,0,0.7);
  z-index: 21;
}

.pianoKey.shaded {
  /* No visual change for shaded keys - just normal piano appearance */
}

.pianoKey.inScale {
  position: relative;
  opacity: 1 !important;
  filter: none !important;
}

/* Green overlay shows which notes ARE in the scale */
.pianoKey.white.inScale::after,
.pianoKey.black.inScale::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(74, 222, 128, 0.4);
  border-radius: 0 0 4px 4px;
  pointer-events: none;
  z-index: 100;
}

/* Highlight the question note with a pulsing yellow glow */
.pianoKey.questionNote {
  animation: pulse-question 1.5s ease-in-out infinite;
}

.pianoKey.white.questionNote {
  box-shadow: inset 0 0 15px rgba(251, 191, 36, 0.5) !important;
  border: 2px solid #fbbf24 !important;
}

.pianoKey.black.questionNote {
  box-shadow: inset 0 0 12px rgba(251, 191, 36, 0.5) !important;
  border: 2px solid #fbbf24 !important;
}

.pianoKey.white.chordSelected {
  box-shadow: inset 0 0 20px rgba(56, 189, 248, 0.5) !important;
  border: 2px solid rgba(56, 189, 248, 0.95) !important;
}

.pianoKey.black.chordSelected {
  box-shadow: inset 0 0 14px rgba(56, 189, 248, 0.55) !important;
  border: 2px solid rgba(56, 189, 248, 0.95) !important;
}

.pianoKeyboard.showNoteLabels .pianoKey[data-scale-label]:not([data-scale-label=""])::before {
  content: attr(data-scale-label);
  position: absolute;
  left: 50%;
  bottom: 8px;
  transform: translateX(-50%);
  font-size: clamp(9px, 1.2vw, 14px);
  font-weight: 800;
  z-index: 101;
  pointer-events: none;
}

.pianoKeyboard.showDegreeLabels .pianoKey[data-degree]:not([data-degree=""])::before {
  content: attr(data-degree);
  position: absolute;
  left: 50%;
  bottom: 8px;
  transform: translateX(-50%);
  font-size: clamp(9px, 1.2vw, 14px);
  font-weight: 800;
  z-index: 101;
  pointer-events: none;
}

.pianoKeyboard.showNoteLabels .pianoKey.white::before {
  color: rgba(10,10,10,0.85);
}

.pianoKeyboard.showDegreeLabels .pianoKey.white::before {
  color: rgba(10,10,10,0.85);
}

.pianoKeyboard.showNoteLabels .pianoKey.black::before {
  color: rgba(255,255,255,0.92);
  bottom: 6px;
  font-size: 9px;
}

.pianoKeyboard.showDegreeLabels .pianoKey.black::before {
  color: rgba(255,255,255,0.92);
  bottom: 6px;
  font-size: 9px;
}

@keyframes pulse-question {
  0%, 100% {
    filter: brightness(1.2);
  }
  50% {
    filter: brightness(1.5);
  }
}

.scaleToggles {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.scaleToggle {
  padding: 0.5rem 0.75rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.2s ease;
  user-select: none;
}

.scaleToggle:hover {
  background: var(--panel2);
  border-color: rgba(255,255,255,0.25);
}

.scaleToggle.active {
  background: rgba(74, 158, 255, 0.2);
  border-color: rgba(74, 158, 255, 0.5);
  color: var(--text);
}

/* Hide instruments in portrait mode */
@media (orientation: portrait) {
  .pianoContainer,
  .guitarContainer,
  .bassContainer {
    display: none !important;
  }
  /* Show expanded instruments in portrait so user can interact with them */
  .pianoContainer.instrumentExpanded,
  .guitarContainer.instrumentExpanded,
  .bassContainer.instrumentExpanded {
    display: flex !important;
  }
}

@media (orientation: landscape) {
  .guitarContainer.instrumentExpanded,
  .bassContainer.instrumentExpanded,
  .pianoContainer.instrumentExpanded {
    top: 0;
    left: var(--landscape-rail-offset);
    right: 0;
    bottom: 0;
    padding: 6px;
    border-radius: 0;
  }

  .pianoContainer.instrumentExpanded {
    right: 12px;
  }
}

@media (min-width: 768px) and (orientation: landscape) {
  .guitarContainer.instrumentExpanded .guitarFretboard {
    flex: 0 0 auto;
    height: min(430px, calc(100vh - 150px));
  }

  .bassContainer.instrumentExpanded .bassFretboard {
    flex: 0 0 auto;
    height: min(430px, calc(100vh - 150px));
  }
}

@media (max-width: 767px) and (orientation: landscape) {
  .bassContainer.instrumentExpanded .bassFretboard {
    flex: 1 1 auto;
    min-height: calc(100vh - 150px);
  }
}