.sr-only {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

input,
select,
button {
  font: inherit;
}

input:focus-visible,
select:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 3px;
}

button:disabled {
  cursor: not-allowed;
  filter: grayscale(0.7);
  opacity: 0.48;
  transform: none !important;
}

.lab-page,
.jamcheck-page {
  background:
    radial-gradient(circle at 78% 5%, rgba(73, 188, 194, 0.18), transparent 30rem),
    linear-gradient(180deg, #04080b, #020405 65%);
}

.lab-main,
.jamcheck-main {
  min-height: 100vh;
}

.lab-hero,
.jamcheck-hero,
.lab-privacy,
.jamcheck-shell,
.jamcheck-notes {
  width: min(100% - 2rem, var(--max-width));
  margin-right: auto;
  margin-left: auto;
}

.lab-hero {
  min-height: 82svh;
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(26rem, 0.7fr);
  gap: clamp(3rem, 8vw, 7rem);
  align-items: center;
  padding: 9rem 0 5rem;
}

.lab-hero h1 {
  max-width: none;
  margin-bottom: 0.85rem;
  font-size: clamp(5rem, 11vw, 9rem);
}

.lab-tagline,
.jamcheck-tagline {
  max-width: 27ch;
  margin-bottom: 1rem;
  color: var(--accent-strong);
  font-size: clamp(1.45rem, 3vw, 2.25rem);
  font-weight: 850;
  line-height: 1.08;
}

.lab-rack {
  min-height: 31rem;
  display: grid;
  align-content: space-between;
  padding: 1.2rem;
  border: 1px solid var(--line-strong);
  border-radius: 0.7rem;
  background:
    linear-gradient(145deg, rgba(127, 230, 234, 0.12), transparent 42%),
    rgba(4, 10, 14, 0.96);
  box-shadow:
    inset 0 0 4rem rgba(73, 188, 194, 0.06),
    0 2.5rem 6rem rgba(0, 0, 0, 0.42);
  transform: perspective(70rem) rotateY(-3deg);
}

.rack-topline,
.rack-labels,
.lab-card-topline,
.panel-code,
.practice-topline {
  color: var(--subtle);
  font-size: 0.68rem;
  font-weight: 900;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.rack-topline,
.rack-labels,
.lab-card-topline,
.practice-topline {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.8rem;
}

.rack-live {
  color: var(--accent-strong);
}

.rack-live::before {
  display: inline-block;
  width: 0.45rem;
  height: 0.45rem;
  margin-right: 0.4rem;
  border-radius: 50%;
  background: var(--accent-strong);
  box-shadow: 0 0 0.8rem var(--accent);
  content: "";
}

.rack-meter-grid {
  height: 16rem;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.8rem;
  align-items: end;
  padding: 1.2rem;
  border: 1px solid var(--line);
  background:
    linear-gradient(rgba(73, 188, 194, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(73, 188, 194, 0.06) 1px, transparent 1px),
    rgba(0, 0, 0, 0.18);
  background-size: 1.25rem 1.25rem;
}

.rack-meter-grid > div {
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  gap: 0.65rem;
}

.rack-meter-grid span {
  height: var(--meter);
  border: 1px solid rgba(127, 230, 234, 0.65);
  border-radius: 0.25rem 0.25rem 0 0;
  background: linear-gradient(180deg, #d4ffff, var(--accent) 55%, rgba(73, 188, 194, 0.18));
  box-shadow: 0 0 1.4rem rgba(73, 188, 194, 0.22);
  transform-origin: bottom;
  animation: meter-breathe 2.8s ease-in-out infinite alternate;
}

.rack-meter-grid > div:nth-child(2) span {
  animation-delay: -0.8s;
}

.rack-meter-grid > div:nth-child(3) span {
  animation-delay: -1.6s;
}

.rack-meter-grid > div:nth-child(4) span {
  animation-delay: -2.2s;
}

.rack-meter-grid small {
  color: var(--subtle);
  font-size: 0.58rem;
  font-weight: 850;
  letter-spacing: 0.1em;
  text-align: center;
}

.rack-signal-line {
  display: grid;
  grid-template-columns: repeat(8, 1fr);
  gap: 0.55rem;
}

.rack-signal-line i {
  height: 0.35rem;
  border-radius: 999px;
  background: rgba(73, 188, 194, 0.16);
}

.rack-signal-line i:nth-child(-n + 5) {
  background: var(--accent);
  box-shadow: 0 0 0.8rem rgba(73, 188, 194, 0.35);
}

.rack-labels {
  color: var(--muted);
  font-size: 0.59rem;
}

.lab-privacy {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 1rem;
  align-items: start;
  margin-bottom: 2rem;
  padding: 1rem 1.15rem;
  border: 1px solid var(--line-strong);
  border-radius: 0.55rem;
  background: rgba(6, 15, 19, 0.9);
}

.privacy-indicator {
  width: 0.7rem;
  height: 0.7rem;
  margin-top: 0.35rem;
  border-radius: 50%;
  background: var(--accent-strong);
  box-shadow: 0 0 1rem rgba(127, 230, 234, 0.64);
}

.lab-privacy strong {
  color: var(--accent-strong);
}

.lab-privacy p {
  margin: 0.2rem 0 0;
  color: var(--muted);
}

.lab-apps {
  border-top: 1px solid var(--line);
}

.lab-app-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.8rem;
}

.lab-app-card {
  position: relative;
  min-height: 24rem;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  padding: 1.3rem;
  border: 1px solid var(--line);
  border-radius: 0.6rem;
  background:
    linear-gradient(145deg, rgba(255, 255, 255, 0.055), transparent 45%),
    rgba(8, 14, 19, 0.94);
}

.lab-app-card::after {
  position: absolute;
  right: -4rem;
  bottom: -4rem;
  width: 10rem;
  height: 10rem;
  border: 1px solid rgba(73, 188, 194, 0.12);
  border-radius: 50%;
  content: "";
  pointer-events: none;
}

.lab-app-card-live {
  border-color: rgba(73, 188, 194, 0.38);
}

.lab-app-card-featured {
  grid-column: span 2;
  min-height: 27rem;
  border-color: var(--line-strong);
  background:
    radial-gradient(circle at 84% 20%, rgba(127, 230, 234, 0.17), transparent 17rem),
    linear-gradient(145deg, rgba(73, 188, 194, 0.14), transparent 50%),
    rgba(7, 14, 19, 0.96);
}

.lab-app-card h3 {
  margin-top: 3.2rem;
  font-size: clamp(1.65rem, 3vw, 2.5rem);
}

.lab-app-card-featured h3 {
  font-size: clamp(3rem, 7vw, 6rem);
  line-height: 0.9;
}

.lab-app-card > p {
  max-width: 42rem;
  color: var(--muted);
}

.lab-inputs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin: auto 0 1.2rem;
}

.lab-inputs span,
.jamcheck-scope span {
  padding: 0.4rem 0.55rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  font-size: 0.65rem;
  font-weight: 800;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.lab-card-action {
  position: relative;
  z-index: 1;
  align-self: flex-start;
}

.lab-card-status {
  color: var(--subtle);
  font-size: 0.7rem;
  font-weight: 850;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

/* JamCheck */

.jamcheck-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(18rem, 0.42fr);
  gap: clamp(2rem, 8vw, 7rem);
  align-items: end;
  padding: 10rem 0 4rem;
}

.jamcheck-hero h1 {
  max-width: none;
  margin-bottom: 0.8rem;
  font-size: clamp(4.8rem, 12vw, 9rem);
}

.jamcheck-hero .hero-copy {
  margin-bottom: 0;
}

.jamcheck-scope {
  display: grid;
  gap: 0.55rem;
  padding-left: 1.2rem;
  border-left: 1px solid var(--line-strong);
}

.jamcheck-scope span {
  text-align: center;
}

.jamcheck-privacy {
  margin-bottom: 3rem;
}

.jamcheck-shell {
  margin-bottom: clamp(4rem, 8vw, 7rem);
  overflow: hidden;
  border: 1px solid var(--line-strong);
  border-radius: 0.75rem;
  background:
    linear-gradient(145deg, rgba(73, 188, 194, 0.08), transparent 35%),
    rgba(5, 10, 14, 0.97);
  box-shadow: 0 2.5rem 7rem rgba(0, 0, 0, 0.42);
}

.jamcheck-shell-header {
  display: grid;
  grid-template-columns: minmax(16rem, 0.45fr) minmax(0, 1fr);
  gap: 2rem;
  align-items: end;
  padding: 1.5rem;
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.025);
}

.jamcheck-shell-header .section-kicker {
  display: block;
  margin-bottom: 0.8rem;
}

.jamcheck-shell-header h2 {
  margin: 0;
  font-size: clamp(1.8rem, 3vw, 2.6rem);
}

.jamcheck-steps {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 0.35rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.jamcheck-steps li {
  min-width: 0;
  padding: 0.75rem 0.5rem;
  border-top: 2px solid var(--line);
  color: var(--subtle);
  font-size: 0.66rem;
  font-weight: 850;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.jamcheck-steps span {
  display: block;
  margin-bottom: 0.2rem;
}

.jamcheck-steps li.is-current {
  border-color: var(--accent-strong);
  color: var(--text);
}

.jamcheck-steps li.is-complete {
  border-color: rgba(73, 188, 194, 0.5);
  color: var(--accent);
}

.jamcheck-panel {
  min-height: 35rem;
  padding: clamp(1.4rem, 4vw, 3rem);
}

.jamcheck-panel[hidden] {
  display: none;
}

.panel-code {
  display: block;
  margin-bottom: 1.2rem;
  color: var(--accent-strong);
}

.jamcheck-panel h3 {
  max-width: 18ch;
  margin-bottom: 1rem;
  font-size: clamp(2rem, 5vw, 4.4rem);
  line-height: 0.98;
}

.jamcheck-panel p {
  color: var(--muted);
}

.intro-grid {
  min-height: 29rem;
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(20rem, 0.55fr);
  gap: clamp(3rem, 8vw, 7rem);
  align-items: center;
}

.intro-grid > div > p {
  max-width: 43rem;
  margin-bottom: 2rem;
  font-size: 1.05rem;
}

.current-specs {
  margin: 0;
  border-top: 1px solid var(--line);
}

.current-specs div {
  display: grid;
  grid-template-columns: 6rem 1fr;
  gap: 1rem;
  padding: 1rem 0;
  border-bottom: 1px solid var(--line);
}

.current-specs dt {
  color: var(--subtle);
  font-size: 0.68rem;
  font-weight: 850;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.current-specs dd {
  margin: 0;
  color: var(--text);
  font-weight: 750;
}

.jamcheck-form {
  display: grid;
  gap: 2.5rem;
}

.form-heading p {
  max-width: 42rem;
}

.settings-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.field-group {
  min-width: 0;
  display: grid;
  gap: 0.65rem;
  padding: 1rem;
  border: 1px solid var(--line);
  border-radius: 0.55rem;
  background: rgba(255, 255, 255, 0.025);
}

.field-group > span,
.field-group > label,
.field-group legend {
  color: var(--muted);
  font-size: 0.7rem;
  font-weight: 850;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.field-group select,
.tempo-number input {
  width: 100%;
  min-height: 3.2rem;
  padding: 0.7rem 0.8rem;
  border: 1px solid var(--line-strong);
  border-radius: 0.4rem;
  background: #061015;
  color: var(--text);
}

input[type="range"] {
  width: 100%;
  accent-color: var(--accent-strong);
}

.tempo-control {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 7rem;
  gap: 1rem;
  align-items: center;
}

.tempo-number {
  position: relative;
}

.tempo-number input {
  padding-right: 3rem;
  font-size: 1.2rem;
  font-weight: 800;
}

.tempo-number small {
  position: absolute;
  top: 50%;
  right: 0.7rem;
  color: var(--subtle);
  font-size: 0.62rem;
  font-weight: 850;
  transform: translateY(-50%);
}

.option-group {
  margin: 0;
}

.option-group legend {
  margin-bottom: 0.6rem;
}

.option-group label {
  position: relative;
  display: block;
  cursor: pointer;
}

.option-group label > input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.option-group label > span {
  display: grid;
  gap: 0.15rem;
  padding: 0.8rem;
  border: 1px solid var(--line);
  border-radius: 0.4rem;
  background: rgba(0, 0, 0, 0.16);
  transition: border-color 150ms ease, background 150ms ease;
}

.option-group label > input:checked + span {
  border-color: var(--accent-strong);
  background: rgba(73, 188, 194, 0.13);
}

.option-group label > input:focus-visible + span {
  outline: 3px solid var(--accent);
  outline-offset: 2px;
}

.option-group strong {
  color: var(--text);
  font-size: 0.92rem;
  text-transform: none;
}

.option-group small {
  color: var(--subtle);
  font-size: 0.76rem;
  letter-spacing: 0;
  text-transform: none;
}

.volume-field {
  grid-column: span 2;
}

.volume-field label {
  display: flex;
  justify-content: space-between;
}

.volume-field output {
  color: var(--accent-strong);
}

.panel-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: center;
  margin-top: 2rem;
  padding-top: 1.2rem;
  border-top: 1px solid var(--line);
}

.panel-actions-split {
  justify-content: space-between;
}

.panel-actions-split > div {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: center;
}

.text-button {
  padding: 0.45rem;
  border: 0;
  background: transparent;
  color: var(--accent-strong);
  font-weight: 800;
  text-decoration: underline;
  text-decoration-color: rgba(127, 230, 234, 0.36);
  text-underline-offset: 0.2rem;
  cursor: pointer;
}

.input-stage {
  display: grid;
  grid-template-columns: minmax(0, 0.65fr) minmax(22rem, 0.6fr);
  gap: clamp(2rem, 8vw, 6rem);
  min-height: 25rem;
  align-items: center;
}

.microphone-setup,
.tap-setup {
  padding: 1.2rem;
  border: 1px solid var(--line);
  border-radius: 0.6rem;
  background: rgba(0, 0, 0, 0.2);
}

.microphone-setup[hidden],
.tap-setup[hidden],
.device-field[hidden] {
  display: none;
}

.headphone-callout {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.8rem;
  margin-bottom: 1rem;
  padding: 0.8rem;
  border-left: 2px solid var(--accent-strong);
  background: rgba(73, 188, 194, 0.08);
}

.headphone-callout strong {
  color: var(--accent-strong);
}

.headphone-callout span {
  color: var(--muted);
  font-size: 0.88rem;
}

.device-field {
  margin-top: 1rem;
  padding: 0;
  border: 0;
  background: transparent;
}

.input-meter {
  position: relative;
  height: 4.6rem;
  display: grid;
  grid-template-columns: repeat(8, 1fr);
  gap: 0.3rem;
  margin-top: 1.3rem;
  overflow: hidden;
  padding: 0.5rem;
  border: 1px solid var(--line);
  border-radius: 0.35rem;
  background: #030709;
}

.input-meter-fill {
  position: absolute;
  z-index: 0;
  top: 0;
  bottom: 0;
  left: 0;
  width: 0;
  background: linear-gradient(90deg, rgba(73, 188, 194, 0.24), rgba(127, 230, 234, 0.72));
  transition: width 80ms linear;
}

.input-meter i {
  position: relative;
  z-index: 1;
  border-right: 1px solid rgba(4, 10, 14, 0.65);
}

.calibration-readout {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 0.65rem;
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.calibration-readout strong {
  color: var(--accent-strong);
}

.input-help {
  min-height: 3rem;
  margin: 1rem 0 0;
  font-size: 0.88rem;
}

.tap-setup {
  text-align: center;
}

.tap-ready-icon {
  width: 8rem;
  height: 8rem;
  display: grid;
  place-items: center;
  margin: 0 auto 1.2rem;
  border: 1px solid var(--accent-strong);
  border-radius: 50%;
  background: rgba(73, 188, 194, 0.1);
  color: var(--accent-strong);
  font-weight: 900;
  letter-spacing: 0.15em;
  box-shadow: inset 0 0 2rem rgba(73, 188, 194, 0.1);
}

.tap-setup h4 {
  margin: 0 0 0.5rem;
  font-size: 1.3rem;
}

.tap-setup p {
  margin: 0;
}

.practice-panel {
  position: relative;
  min-height: 42rem;
  text-align: center;
}

.practice-topline {
  color: var(--muted);
}

.practice-topline > span:first-child {
  color: var(--accent-strong);
}

.practice-cue {
  width: clamp(10rem, 22vw, 14rem);
  aspect-ratio: 1;
  display: grid;
  place-items: center;
  margin: 3rem auto 1.4rem;
  border: 1px solid var(--line-strong);
  border-radius: 50%;
  background:
    radial-gradient(circle, rgba(127, 230, 234, 0.18), transparent 62%),
    #061014;
  box-shadow:
    inset 0 0 3rem rgba(73, 188, 194, 0.1),
    0 0 4rem rgba(73, 188, 194, 0.09);
}

.practice-cue span {
  color: var(--accent-strong);
  font-size: clamp(4.5rem, 10vw, 7rem);
  font-weight: 900;
  line-height: 1;
}

.practice-cue.is-hit {
  animation: cue-hit 180ms ease-out;
}

.practice-instruction {
  min-height: 1.6rem;
  margin-bottom: 2rem;
}

.practice-progress {
  height: 0.35rem;
  overflow: hidden;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
}

.practice-progress span {
  display: block;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--accent), var(--accent-strong));
  box-shadow: 0 0 1rem rgba(73, 188, 194, 0.5);
}

.beat-grid {
  position: relative;
  display: grid;
  grid-template-columns: repeat(32, 1fr);
  gap: 0.22rem;
  min-height: 2.5rem;
  margin-top: 0.65rem;
}

.beat-grid > span {
  height: 1rem;
  border-top: 2px solid var(--line);
}

.beat-grid > span.is-bar-start {
  border-color: var(--line-strong);
}

.beat-grid > span.is-complete {
  border-color: var(--accent);
}

.beat-grid > span.is-current {
  border-color: var(--accent-strong);
  box-shadow: 0 -0.3rem 0.6rem rgba(127, 230, 234, 0.35);
}

.beat-grid .live-hit {
  position: absolute;
  top: 1.25rem;
  width: 0.28rem;
  height: 0.9rem;
  border-radius: 999px;
  background: var(--accent-strong);
  box-shadow: 0 0 0.65rem var(--accent);
  transform: translateX(-50%);
}

.tap-pad {
  width: min(100%, 34rem);
  min-height: 7rem;
  display: grid;
  gap: 0.2rem;
  place-content: center;
  margin: 1.4rem auto 0;
  border: 1px solid var(--accent-strong);
  border-radius: 0.65rem;
  background:
    linear-gradient(145deg, rgba(127, 230, 234, 0.16), transparent),
    #071218;
  color: var(--text);
  cursor: pointer;
  touch-action: manipulation;
  user-select: none;
}

.tap-pad[hidden] {
  display: none;
}

.tap-pad span {
  font-size: 1.35rem;
  font-weight: 900;
}

.tap-pad small {
  color: var(--muted);
}

.tap-pad.is-hit {
  animation: tap-hit 130ms ease-out;
}

.cancel-session {
  margin-top: 1rem;
}

.results-panel {
  min-height: 42rem;
}

.result-hero {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: clamp(2rem, 7vw, 5rem);
  align-items: center;
}

.score-dial {
  --score: 0deg;
  position: relative;
  width: clamp(10rem, 22vw, 14rem);
  aspect-ratio: 1;
  display: grid;
  place-content: center;
  border-radius: 50%;
  background: conic-gradient(var(--accent-strong) var(--score), rgba(73, 188, 194, 0.12) 0);
  text-align: center;
  box-shadow: 0 0 4rem rgba(73, 188, 194, 0.14);
}

.score-dial::before {
  position: absolute;
  inset: 0.7rem;
  border-radius: 50%;
  background: #071015;
  content: "";
}

.score-dial span,
.score-dial small {
  position: relative;
  z-index: 1;
}

.score-dial span {
  color: var(--text);
  font-size: clamp(3.5rem, 8vw, 5.5rem);
  font-weight: 900;
  line-height: 0.9;
}

.score-dial small {
  margin-top: 0.45rem;
  color: var(--muted);
  font-size: 0.65rem;
  font-weight: 850;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.result-hero h3 {
  max-width: none;
}

.result-hero p {
  max-width: 45rem;
  font-size: 1.08rem;
}

.result-metrics {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 0.55rem;
  margin: 2.5rem 0;
}

.result-metrics div {
  min-height: 7rem;
  padding: 0.9rem;
  border: 1px solid var(--line);
  border-radius: 0.45rem;
  background: rgba(255, 255, 255, 0.025);
}

.result-metrics dt {
  margin-bottom: 1rem;
  color: var(--subtle);
  font-size: 0.64rem;
  font-weight: 850;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.result-metrics dd {
  margin: 0;
  color: var(--text);
  font-size: 1rem;
  font-weight: 850;
}

.timing-lane {
  position: relative;
  height: 8.5rem;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 0.45rem;
  background:
    linear-gradient(90deg, rgba(73, 188, 194, 0.04), rgba(127, 230, 234, 0.11), rgba(73, 188, 194, 0.04)),
    #040a0d;
}

.timing-center {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 1px;
  background: var(--accent-strong);
  box-shadow: 0 0 1.2rem rgba(127, 230, 234, 0.45);
}

.timing-label {
  position: absolute;
  top: 0.55rem;
  color: var(--subtle);
  font-size: 0.62rem;
  font-weight: 850;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.timing-label-early {
  left: 0.65rem;
}

.timing-label-late {
  right: 0.65rem;
}

.timing-hit {
  position: absolute;
  width: 0.45rem;
  height: 0.45rem;
  border-radius: 50%;
  background: var(--accent-strong);
  box-shadow: 0 0 0.65rem rgba(127, 230, 234, 0.55);
  transform: translate(-50%, -50%);
}

.result-footnote {
  margin: 0.75rem 0 0;
  font-size: 0.83rem;
}

.jamcheck-notes {
  display: grid;
  grid-template-columns: minmax(0, 0.6fr) minmax(0, 1fr);
  gap: clamp(2rem, 7vw, 6rem);
  padding: 0 0 clamp(5rem, 9vw, 8rem);
}

.note-grid {
  display: grid;
  gap: 0.7rem;
}

.note-grid article {
  padding: 1rem;
  border-left: 1px solid var(--line-strong);
  background: linear-gradient(90deg, rgba(73, 188, 194, 0.06), transparent);
}

.note-grid h3 {
  font-size: 1.05rem;
}

.note-grid p {
  margin: 0;
  color: var(--muted);
}

@keyframes meter-breathe {
  from { transform: scaleY(0.86); opacity: 0.72; }
  to { transform: scaleY(1); opacity: 1; }
}

@keyframes cue-hit {
  from { transform: scale(0.92); border-color: var(--accent-strong); }
  to { transform: scale(1); }
}

@keyframes tap-hit {
  0% { transform: scale(0.985); background-color: rgba(127, 230, 234, 0.36); }
  100% { transform: scale(1); }
}

@media (max-width: 900px) {
  .lab-hero,
  .jamcheck-hero,
  .jamcheck-shell-header,
  .input-stage,
  .jamcheck-notes {
    grid-template-columns: minmax(0, 1fr);
  }

  .lab-rack {
    transform: none;
  }

  .lab-app-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .lab-app-card-featured {
    grid-column: span 2;
  }

  .jamcheck-hero {
    align-items: start;
  }

  .jamcheck-scope {
    grid-template-columns: repeat(3, 1fr);
    padding: 1rem 0 0;
    border-top: 1px solid var(--line-strong);
    border-left: 0;
  }

  .result-metrics {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 680px) {
  .lab-hero {
    min-height: auto;
    grid-template-columns: 1fr;
    padding-top: 12rem;
  }

  .lab-hero h1,
  .jamcheck-hero h1 {
    font-size: clamp(3.8rem, 18vw, 5.4rem);
  }

  .lab-rack {
    min-height: 25rem;
  }

  .rack-meter-grid {
    height: 12rem;
  }

  .lab-app-grid,
  .settings-grid,
  .intro-grid,
  .result-hero {
    grid-template-columns: 1fr;
  }

  .lab-app-card-featured,
  .volume-field {
    grid-column: auto;
  }

  .lab-app-card,
  .lab-app-card-live {
    min-height: 22rem;
  }

  .lab-app-card-featured h3 {
    font-size: clamp(3rem, 17vw, 4.6rem);
  }

  .jamcheck-hero {
    padding-top: 12rem;
  }

  .jamcheck-scope {
    grid-template-columns: 1fr;
  }

  .jamcheck-shell {
    width: min(100% - 1rem, var(--max-width));
  }

  .jamcheck-shell-header,
  .jamcheck-panel {
    padding: 1rem;
  }

  .jamcheck-steps {
    overflow-x: auto;
    grid-template-columns: repeat(5, minmax(5.4rem, 1fr));
    padding-bottom: 0.35rem;
  }

  .intro-grid {
    min-height: auto;
  }

  .tempo-control {
    grid-template-columns: 1fr;
  }

  .panel-actions,
  .panel-actions-split,
  .panel-actions-split > div {
    align-items: stretch;
  }

  .panel-actions .button,
  .panel-actions-split > div,
  .panel-actions-split > div .button,
  .panel-actions-split > .button {
    width: 100%;
  }

  .headphone-callout {
    grid-template-columns: 1fr;
  }

  .beat-grid {
    gap: 0.12rem;
  }

  .result-hero {
    text-align: center;
  }

  .score-dial {
    margin: 0 auto;
  }

  .result-metrics {
    grid-template-columns: 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  .rack-meter-grid span,
  .practice-cue.is-hit,
  .tap-pad.is-hit {
    animation: none;
  }

  .input-meter-fill {
    transition: none;
  }
}