:root {
  --bg: #202834;
  --bg-soft: #2a3442;
  --card: #3a4452;
  --text: #e9edf2;
  --muted: #a8b6c8;
  --accent: #f2bf2f;
  --good: #33d46f;
  --danger: #e56363;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Avenir Next", "Segoe UI", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 10% 8%, #3e4a5f 0%, transparent 30%),
    radial-gradient(circle at 90% 5%, #35414e 0%, transparent 26%),
    var(--bg);
}

.hidden {
  display: none !important;
}

.topbar {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  padding: 12px 18px;
  border-bottom: 1px solid #4b5668;
  background: rgba(22, 30, 42, 0.85);
}

.topbar h1 {
  margin: 0;
  font-size: 22px;
  justify-self: start;
}

.topbar-center {
  justify-self: center;
}

.topbar-controls {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 10px;
  flex-wrap: wrap;
  justify-self: end;
}

.app-main {
  padding: 14px;
}

.donation-section {
  margin-top: 12px;
  background: linear-gradient(170deg, #2f3a4b, #263041);
  border: 1px solid #56627a;
  border-radius: 12px;
  padding: 14px;
}

.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(6, 10, 16, 0.62);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  z-index: 1000;
}

.modal-card {
  width: min(520px, 96vw);
  background: linear-gradient(170deg, #2f3a4b, #263041);
  border: 1px solid #56627a;
  border-radius: 12px;
  padding: 16px;
}

.modal-card h3 {
  margin: 0 0 8px 0;
}

.modal-card p {
  margin: 0 0 12px 0;
  color: var(--muted);
}

.donation-section h3 {
  margin: 0 0 8px 0;
}

.donation-section p {
  margin: 0 0 12px 0;
  color: var(--muted);
  line-height: 1.4;
}

.donate-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 120px;
  height: 36px;
  padding: 0 14px;
  border-radius: 10px;
  border: 1px solid #ffd060;
  background: #ffd060;
  color: #0f1b28;
  font-weight: 700;
  text-decoration: none;
}

.donate-btn:hover {
  filter: brightness(1.04);
}

.controls-inline {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

label {
  color: var(--muted);
  font-size: 13px;
}

select,
input[type="range"],
button {
  border-radius: 8px;
  border: 1px solid #627189;
  background: #182535;
  color: var(--text);
  padding: 6px 10px;
}

button {
  cursor: pointer;
}

button:hover {
  border-color: var(--accent);
}

button:disabled {
  cursor: default;
  opacity: 0.55;
  border-color: #4a5360;
}

.icon-play-btn {
  min-width: 42px;
  height: 34px;
  padding: 0;
  font-size: 18px;
  font-weight: 700;
  line-height: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.icon-play-btn.active {
  background: #ffd060;
  color: #0f1b28;
  border-color: #ffd060;
}

#detectMidiSoundToggle.active,
#metroMidiSoundToggle.active {
  background-color: #ffd060 !important;
  color: #0f1b28 !important;
  border-color: #ffd060 !important;
  border-style: solid;
}

.icon-play-btn.stop-mode {
  font-size: 0;
}

.icon-play-btn.stop-mode::before {
  content: "";
  width: 12px;
  height: 12px;
  background: currentColor;
  border-radius: 2px;
  display: block;
}

.ghost {
  background: transparent;
  border-style: dashed;
}

#midiToggle.active {
  background-color: #ffd060 !important;
  color: #0f1b28 !important;
  border-color: #ffd060 !important;
  border-style: solid;
}

.mode-menu {
  display: grid;
  grid-template-columns: repeat(2, minmax(260px, 1fr));
  gap: 14px;
}

.menu-card {
  min-height: 140px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-size: 18px;
  background: linear-gradient(165deg, #394453, #2e3948);
  border: 2px solid #4f5c70;
}

.menu-card .icon {
  font-size: 34px;
  color: #6fd7ff;
}

.menu-card .title {
  font-weight: 700;
}

.mode-screen {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

#modeSelect {
  min-width: 280px;
  font-size: 16px;
  font-weight: 700;
}

@media (max-width: 1200px) {
  .topbar {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 8px;
  }

  .topbar-center {
    order: 2;
    width: 100%;
    display: flex;
    justify-content: center;
  }

  .topbar-controls {
    order: 3;
    width: 100%;
    justify-content: flex-end;
  }
}

.inst-btn.active {
  background: #ffd060;
  color: #0f1b28;
  border-color: #ffd060;
}

.mode-layout {
  display: grid;
  grid-template-columns: minmax(520px, 1fr) minmax(340px, 42%);
  grid-template-areas:
    "staff sidebar"
    "instrument instrument";
  gap: 12px;
  min-height: calc(100vh - 170px);
  align-content: start;
}

.staff-panel,
.sidebar,
.instrument-panel {
  background: linear-gradient(170deg, #313c4c, #273140);
  border: 1px solid #56627a;
  border-radius: 12px;
  padding: 12px;
}

.staff-panel {
  grid-area: staff;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.staff-header {
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}

#staffCanvas {
  width: 100%;
  height: 100%;
  border-radius: 10px;
  border: 1px solid #3a4558;
  background: #0f1621;
  min-height: 410px;
}

.sidebar {
  grid-area: sidebar;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.sidebar-top {
  flex: 1;
  min-height: 200px;
}

.instrument-panel {
  grid-area: instrument;
  min-height: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
  position: relative;
  align-self: start;
}

.instrument-panel.with-inst-dock {
  padding-right: 108px;
}

.instrument-panel:not(.with-inst-dock) .instrument-dock {
  display: none;
}

.instrument-panel.guitar-active {
  min-height: 300px;
}

.instrument-dock {
  position: absolute;
  top: 12px;
  right: 12px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  z-index: 3;
}

.instrument-dock .inst-btn {
  min-width: 86px;
}

.instrument-dock #guitarHandedness {
  min-width: 86px;
  height: 38px;
  border-radius: 10px;
  border: 1px solid #4a6180;
  background: #17273a;
  color: #e8effa;
  font-weight: 700;
  padding: 0 8px;
}

.mode-screen.mode-generation .staff-panel,
.mode-screen.mode-scales .staff-panel {
  max-height: min(50vh, 500px);
}

.mode-screen.mode-generation #staffCanvas,
.mode-screen.mode-scales #staffCanvas {
  min-height: clamp(360px, 40vh, 440px);
}

.mode-screen.mode-generation .sidebar-top,
.mode-screen.mode-scales .sidebar-top {
  max-height: min(50vh, 500px);
  overflow: auto;
}

.mode-screen.mode-detection .staff-panel {
  max-height: min(49vh, 470px);
}

.mode-screen.mode-detection #staffCanvas {
  min-height: clamp(340px, 40vh, 420px);
}

.mode-screen.mode-detection .sidebar-top {
  max-height: min(49vh, 470px);
  overflow: auto;
}

.mode-screen.mode-detection .mode-layout {
  min-height: auto;
}

.mode-screen.mode-generation .instrument-panel {
  min-height: 0;
}

.mode-screen.mode-generation .instrument-panel.guitar-active {
  min-height: 300px;
}

.mode-screen.mode-generation .guitar-canvas {
  height: 230px;
}

#guitarVariationBar {
  justify-content: center;
  margin-top: 2px;
}

.guitar-var-btn {
  min-width: 34px;
  height: 30px;
  padding: 0 8px;
  border-radius: 8px;
  border: 1px solid #8a92a3;
  background: #6a7283;
  color: #000;
  font-weight: 700;
}

.guitar-var-btn.active {
  background: #ff9f1a;
  border-color: #ffbf66;
}

.mode-panel h3 {
  margin: 0 0 8px 0;
}

.muted {
  color: var(--muted);
  font-size: 13px;
}

.scale-mode-group {
  justify-content: center;
  margin-bottom: 8px;
}

.scale-mode-btn {
  min-width: 42px;
}

.scale-mode-btn.active {
  background: #ffd060;
  color: #0f1b28;
  border-color: #ffd060;
}

.scale-controls-inline {
  display: grid;
  grid-template-columns: auto auto 1fr;
  align-items: center;
  width: 100%;
}

.scale-metronome-volume {
  display: grid;
  grid-template-columns: 72px 1fr 72px;
  align-items: center;
  gap: 8px;
  width: 100%;
}

#scaleMetroVolume {
  width: 100%;
  padding: 0;
}

#scaleMetroVolumeValue {
  color: #ff9f1a;
  font-size: 13px;
  font-weight: 700;
  min-width: 72px;
  text-align: right;
}

.row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 8px 0;
}

.row select,
.row input[type="range"] {
  flex: 1;
}

#panelMetronome .row {
  display: grid;
  grid-template-columns: 120px auto 1fr auto auto;
  gap: 8px;
  align-items: center;
}

#panelMetronome .row input[type="number"] {
  width: 66px;
}

.metro-timer-row {
  grid-template-columns: 120px auto auto auto auto !important;
  justify-content: start;
}

.metro-bpm-meta {
  margin: -2px 0 8px 120px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 42px;
}

#bpmValue {
  color: #ff9f1a;
  font-size: 20px;
  font-weight: 700;
  line-height: 1.1;
}

#metroPresetValue {
  margin-top: 2px;
  color: #ffb17a;
  font-size: 13px;
  font-weight: 700;
}

#metroVolumeValue {
  color: #ff9f1a;
  font-size: 13px;
  font-weight: 700;
  min-width: 52px;
  text-align: right;
}

.metro-meter-meta {
  margin: -2px 0 8px 120px;
  display: flex;
  justify-content: center;
  min-height: 24px;
}

#metroMeterValue {
  color: #dfe3ea;
  font-size: 18px;
  font-weight: 700;
  line-height: 1.1;
}

#metroFigures {
  gap: 6px;
}

.metro-figure {
  min-width: 38px;
  height: 32px;
  padding: 0 8px;
  font-weight: 700;
}

.metro-figure.triplet {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  line-height: 1;
  padding-top: 2px;
}

.metro-figure.triplet .triplet-num {
  font-size: 10px;
  margin-bottom: 1px;
}

.metro-figure.triplet .triplet-glyph {
  font-size: 14px;
}

.metro-figure.active {
  background: #ff9f1a;
  color: #111822;
  border-color: #ffbf66;
}

.metro-motion {
  position: relative;
  height: 34px;
  margin-top: 8px;
}

.metro-motion .rail {
  position: absolute;
  left: 12px;
  right: 12px;
  top: 16px;
  height: 2px;
  background: #8ea0b7;
}

.metro-motion .dot {
  position: absolute;
  top: 8px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: #ff5a2f;
  border: 1px solid #ffd9c9;
  transform: translateX(-50%);
}

.result-block {
  margin-top: 10px;
  padding: 10px;
  border-radius: 10px;
  background: rgba(10, 18, 30, 0.45);
  border: 1px dashed #73829a;
}

.label {
  color: var(--muted);
}

.piano {
  --white-key-w: clamp(28px, 2.4vw, 34px);
  --black-key-w: calc(var(--white-key-w) * 0.64);
  --white-key-h: 124px;
  --black-key-h: 72px;
  user-select: none;
  display: flex;
  align-items: flex-start;
  gap: 0;
  overflow-x: auto;
  overflow-y: hidden;
  padding: 6px 2px 4px 2px;
  max-width: 100%;
  min-height: 138px;
  border: 1px solid #3a4558;
  border-radius: 10px;
  background: #e8ecf2;
}

.key {
  width: var(--white-key-w);
  height: var(--white-key-h);
  border-radius: 0 0 8px 8px;
  border: 1px solid #7b8798;
  background: #f7f7f4;
  color: #10243a;
  position: relative;
  cursor: pointer;
  flex: 0 0 auto;
}

.key.black {
  width: var(--black-key-w);
  height: var(--black-key-h);
  margin: 0 calc(var(--black-key-w) / -2);
  z-index: 2;
  background: #101822;
  border-color: #000;
  color: #dce7f4;
}

.key.active {
  outline: 2px solid var(--accent);
  outline-offset: -2px;
  background: #ffe2a6;
}

.key.black.active {
  background: #7f5711;
}

.key.rh {
  background: #4da3ea;
  border-color: #2b6da6;
}

.key.black.rh {
  background: #0078d7;
  border-color: #005ca6;
}

.key.lh {
  background: #ff8a2b;
  border-color: #c8772f;
}

.key.black.lh {
  background: #ff8a2b;
  border-color: #7a3d00;
}

.key.extra {
  outline: 2px solid var(--danger);
  outline-offset: -2px;
  background: #ffc1c1;
}

.key.black.extra {
  background: #8b1f1f;
}

.key.tonic {
  box-shadow: inset 0 0 0 2px var(--good);
}

.key .key-label {
  position: absolute;
  left: 3px;
  right: 3px;
  bottom: 4px;
  font-size: 10px;
  text-align: center;
}

.key.forbidden-flash::after {
  content: "🚫";
  position: absolute;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 16px;
  line-height: 1;
  pointer-events: none;
  z-index: 6;
}

.key.forbidden-flash:not(.black)::after {
  top: calc(100% - 44px);
}

.key.black.forbidden-flash::after {
  top: calc(60% - 10px);
}

.finger-badge {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: #f6b60b;
  border: 1px solid #8d6b00;
  color: #101010;
  font-size: 10px;
  font-weight: 700;
  line-height: 16px;
  text-align: center;
  pointer-events: none;
}

.finger-badge.white-key {
  top: calc(100% - 46px);
}

.finger-badge.black-key {
  top: calc(60% - 9px);
}

.scale-badge {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  min-width: 24px;
  height: 24px;
  padding: 0 3px;
  border-radius: 999px;
  background: #f6b60b;
  border: 1px solid #8d6b00;
  color: #101010;
  font-size: 10px;
  font-weight: 700;
  line-height: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  pointer-events: none;
  white-space: nowrap;
  z-index: 4;
}

.scale-badge.tonic {
  background: #32d74b;
  border-color: #1e8c38;
}

.scale-badge.current {
  background: #2fb8ff;
  border-color: #1f7fb2;
  color: #071926;
}

.scale-badge.white-key {
  top: calc(var(--black-key-h) + ((var(--white-key-h) - var(--black-key-h)) * 0.38));
}

.scale-badge.black-key {
  top: 50%;
}

.scale-badge.center-indicator {
  top: 12px;
}

.guitar-canvas {
  width: 100%;
  height: 220px;
  border-radius: 10px;
  border: 1px solid #3a4558;
  background: #f7f7f7;
}

.tuner-spectrum-canvas {
  width: 100%;
  height: 240px;
  border-radius: 10px;
  border: 1px solid #3a4558;
  background: #0f1621;
}

.guitar-table {
  border-collapse: separate;
  border-spacing: 4px;
  width: max-content;
  min-width: 100%;
}

.guitar-table th {
  color: var(--muted);
  font-size: 11px;
  text-align: center;
  font-weight: 600;
}

.fret-note {
  width: 42px;
  height: 30px;
  padding: 0;
  border-radius: 16px;
  border: 1px solid #7a8aa0;
  background: #e9eef5;
  color: #19283a;
  font-size: 11px;
  font-weight: 700;
}

.fret-note.active {
  background: #ffd46a;
  border-color: #c69928;
}

.fret-note.root {
  background: #52d16f;
  border-color: #1e8c38;
}

.fret-note.extra {
  background: #f48f8f;
  border-color: #a13737;
}

.dot-row {
  margin-top: 12px;
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.dot {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: #a4adbc;
  color: #1f2e3e;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
}

.dot.active {
  background: #5ec7ff;
  color: #08233a;
}

.dot.accent.active {
  background: #ffb35a;
}

#panelTuner .row input[type="number"] {
  width: 86px;
}

.tuner-meta {
  margin: -2px 0 8px 120px;
  display: flex;
  justify-content: center;
  min-height: 22px;
}

#tunerGainValue {
  color: #ff9f1a;
  font-size: 18px;
  font-weight: 700;
}

@media (max-width: 1200px) {
  .mode-layout {
    grid-template-columns: 1fr;
    grid-template-areas:
      "staff"
      "sidebar"
      "instrument";
    min-height: initial;
  }

  #staffCanvas {
    min-height: 340px;
  }

  .instrument-panel.with-inst-dock {
    padding-right: 12px;
  }

  .instrument-dock {
    position: static;
    flex-direction: row;
    align-self: flex-end;
  }
}

@media (max-width: 1100px) {
  .mode-layout {
    grid-template-columns: 1fr;
  }
  .mode-menu {
    grid-template-columns: 1fr;
  }
}