:root {
  color-scheme: dark;
  --app-bg: #101214;
  --surface-strong: #24282d;
  --line: rgba(255, 255, 255, 0.14);
  --line-strong: rgba(255, 255, 255, 0.28);
  --accent: #d17a19;
  --playhead: #f0c859;
  --blue: #57b7c5;
}

body {
  min-height: 100vh;
  overflow-x: hidden;
  background:
    radial-gradient(circle at 14% 0%, rgba(87, 183, 197, 0.16), transparent 23rem),
    linear-gradient(145deg, var(--app-bg), #171a1e 58%, #101214);
}

.app-nav {
  min-height: 3rem;
  border-bottom: 1px solid var(--line);
  background: rgba(25, 28, 32, 0.94);
  backdrop-filter: blur(0.75rem);
}

.brand-mark {
  width: 1.8rem;
  height: 1.8rem;
  border-radius: 0.35rem;
}

.navbar-brand {
  font-size: 0.92rem;
  font-weight: 800;
}

.page-title {
  color: #fff;
  font-size: 0.88rem;
  font-weight: 900;
}

.piano-shell {
  min-height: calc(100vh - 3rem);
  display: flex;
  flex-direction: column;
}

.transport-band {
  display: block;
  padding: 0.35rem 0.5rem;
  border-bottom: 1px solid var(--line);
  background: var(--surface-strong);
}

.transport-controls {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.25rem;
}

.transport-soundbank {
  flex: 0 0 auto;
  min-width: 0;
}

.transport-soundbank .form-select {
  width: auto;
  min-width: 11rem;
  max-width: calc(100vw - 1rem);
  min-height: 2.05rem;
  border-color: var(--line);
  border-radius: 0.28rem;
  background-color: #171b20;
  color: #f8f9fa;
  font-size: 0.78rem;
  font-weight: 800;
}

.transport-soundbank .form-select:focus {
  border-color: var(--line-strong);
  box-shadow: 0 0 0 0.18rem rgba(209, 122, 25, 0.22);
}

.octave-controls {
  display: grid;
  grid-template-columns: 2.05rem minmax(4.1rem, auto) 2.05rem;
  align-items: center;
  gap: 0.25rem;
}

.octave-button {
  min-width: 2.05rem;
  min-height: 2.05rem;
  padding: 0;
  border-radius: 0.28rem;
  font-size: 0.9rem;
  font-weight: 900;
  line-height: 1;
}

.octave-select-wrap .form-select {
  width: 4.3rem;
  min-height: 2.05rem;
  border-color: var(--line);
  border-radius: 0.28rem;
  background-color: #171b20;
  color: #f8f9fa;
  font-size: 0.78rem;
  font-weight: 800;
}

.octave-select-wrap .form-select:focus {
  border-color: var(--line-strong);
  box-shadow: 0 0 0 0.18rem rgba(209, 122, 25, 0.22);
}

.piano-workspace {
  display: flex;
  align-items: center;
  flex: 1 1 auto;
  width: 100%;
  padding: 1rem 0.5rem 0.75rem;
}

.ear-piano {
  position: relative;
  width: 100%;
  aspect-ratio: 15 / 3.4;
  touch-action: manipulation;
}

.piano-whites {
  display: grid;
  grid-template-columns: repeat(15, minmax(0, 1fr));
  height: 100%;
}

.piano-key {
  position: relative;
  border: 1px solid #29313b;
  color: #12161c;
  font-weight: 800;
  line-height: 1;
}

.piano-key.white {
  display: flex;
  align-items: flex-end;
  justify-content: center;
  padding: 0 0.1rem 0.45rem;
  border-radius: 0 0 0.28rem 0.28rem;
  background: linear-gradient(#f8f7ee, #d7d5c9);
  font-size: clamp(0.62rem, 2.4vw, 0.84rem);
}

.piano-key.black {
  position: absolute;
  top: 0;
  z-index: 3;
  width: 5.25%;
  height: 61%;
  padding: 0 0.05rem 0.35rem;
  border-color: #06080a;
  border-radius: 0 0 0.24rem 0.24rem;
  background: linear-gradient(#252b32, #050607);
  color: #f3f5f7;
  font-size: clamp(0.52rem, 1.9vw, 0.72rem);
}

.piano-key.is-highlighted {
  border-color: #ffe27a;
  outline: 0.28rem solid #ffe27a;
  outline-offset: -0.34rem;
  box-shadow:
    inset 0 0 0 999rem rgba(255, 226, 122, 0.34),
    0 0 1.15rem rgba(255, 226, 122, 0.86);
  transform: translateY(-0.16rem);
}

.piano-key.is-root {
  border-color: #61d9ff;
  outline-color: #61d9ff;
  box-shadow:
    inset 0 0 0 999rem rgba(97, 217, 255, 0.34),
    0 0 1.15rem rgba(97, 217, 255, 0.84);
}

.piano-key:focus-visible {
  outline: 0.2rem solid var(--accent);
  outline-offset: -0.2rem;
}

.piano-key.is-flashing,
.piano-key.is-playing {
  animation: piano-key-flash 220ms ease-out;
}

.arpeggiator-band,
.bindings-band {
  border-top: 1px solid var(--line);
  background: rgba(16, 18, 20, 0.84);
}

.arpeggiator-band {
  padding: 0.65rem 0.5rem;
}

.arpeggiator-controls {
  display: grid;
  grid-template-columns: auto minmax(8.5rem, 1fr) minmax(5.75rem, 0.42fr) minmax(5.75rem, 0.42fr);
  align-items: end;
  gap: 0.5rem;
  width: 100%;
}

.arp-toggle {
  min-height: 2.2rem;
  border-radius: 0.28rem;
  font-size: 0.82rem;
  font-weight: 900;
  white-space: nowrap;
}

.arp-field {
  display: grid;
  gap: 0.22rem;
  min-width: 0;
}

.arp-field span {
  color: rgba(255, 255, 255, 0.72);
  font-size: 0.68rem;
  font-weight: 900;
  line-height: 1;
  text-transform: uppercase;
}

.arp-field .form-select,
.arp-field .form-control {
  min-height: 2.2rem;
  border-color: var(--line);
  border-radius: 0.28rem;
  background-color: #171b20;
  color: #f8f9fa;
  font-size: 0.82rem;
  font-weight: 800;
}

.transport-soundbank .form-select option,
.octave-select-wrap .form-select option,
.arp-field .form-select option {
  background-color: #171b20;
  color: #f8f9fa;
}

.transport-soundbank .form-select:focus,
.octave-select-wrap .form-select:focus,
.arp-field .form-select:focus,
.arp-field .form-control:focus {
  background-color: #171b20;
  color: #fff;
}

.arp-bpm-field,
.arp-length-field {
  max-width: 7rem;
}

.arp-held-notes {
  grid-column: 1 / -1;
  min-height: 1.25rem;
  overflow: hidden;
  color: rgba(255, 255, 255, 0.68);
  font-size: 0.76rem;
  font-weight: 800;
  line-height: 1.25;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.bindings-band {
  padding: 0.55rem 0.5rem 0.7rem;
}

.keyboard-bindings {
  display: grid;
  gap: 0.32rem;
  justify-items: center;
  overflow-x: auto;
  padding-bottom: 0.1rem;
}

.keyboard-bindings-row {
  display: flex;
  gap: 0.24rem;
  min-width: max-content;
}

.keyboard-bindings-row-1 {
  padding-left: 0;
}

.keyboard-bindings-row-3 {
  padding-left: 0.95rem;
}

.binding-chip {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.28rem;
  width: 3.55rem;
  min-height: 3.35rem;
  padding: 0.3rem 0.2rem;
  border: 1px solid var(--line);
  border-radius: 0.28rem;
  background: rgba(255, 255, 255, 0.055);
  color: rgba(255, 255, 255, 0.82);
  font-size: 0.72rem;
  font-weight: 800;
}

.binding-chip-spacer {
  width: 3.55rem;
  min-height: 3.35rem;
}

.binding-chip kbd {
  min-width: 1.55rem;
  padding: 0.1rem 0.24rem;
  border: 1px solid rgba(255, 255, 255, 0.24);
  border-radius: 0.2rem;
  background: #050607;
  color: #fff;
  font-size: 0.68rem;
  font-weight: 900;
  text-align: center;
}

.binding-chip span {
  line-height: 1;
  text-align: center;
}

.binding-chip-action {
  border-color: rgba(209, 122, 25, 0.42);
  color: #ffd18f;
}

@keyframes piano-key-flash {
  50% {
    filter: brightness(1.62) saturate(1.16);
    box-shadow:
      inset 0 0 0 999rem rgba(255, 238, 145, 0.22),
      0 0 1.45rem rgba(255, 238, 145, 0.98),
      0 0 0.85rem rgba(255, 255, 255, 0.9);
  }
}

@media (max-width: 420px) {
  .page-title {
    display: none;
  }

  .piano-workspace {
    align-items: flex-start;
    flex: 0 0 auto;
    padding-top: 1.15rem;
  }

  .ear-piano {
    min-height: 6.5rem;
  }

  .arpeggiator-controls {
    grid-template-columns: 1fr 1fr;
  }

  .arp-toggle {
    width: 100%;
  }

  .arp-bpm-field,
  .arp-length-field {
    max-width: none;
  }

  .bindings-band {
    padding-inline: 0.35rem;
  }

  .keyboard-bindings {
    justify-items: start;
  }

  .binding-chip,
  .binding-chip-spacer {
    width: 3.15rem;
    min-height: 3.05rem;
  }

  .binding-chip {
    font-size: 0.66rem;
  }
}