:root {
  --bg: #0a1018;
  --surface: #111723;
  --surface-2: #162132;
  --surface-3: #1a2438;
  --surface-4: #101725;
  --line: #2a3340;
  --line-2: #375277;
  --text: #edf4ff;
  --muted: #8ca0b7;
  --blue: #8fd3ff;
  --blue-2: #bfe0ff;
  --green: #9ee493;
  --amber: #ffd98f;
  --gold: #f2cc63;
  --red: #ff8a8a;
  --shadow: 0 22px 44px rgba(0, 0, 0, 0.32);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  background:
    radial-gradient(circle at top left, rgba(143, 211, 255, 0.12), transparent 24%),
    radial-gradient(circle at right 18% top 10%, rgba(242, 204, 99, 0.09), transparent 18%),
    linear-gradient(180deg, #0b111a 0%, #090e15 100%);
  color: var(--text);
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
}

body {
  padding: 10px;
}

button,
input,
select {
  font: inherit;
}

h1,
h2,
p {
  margin: 0;
}

.app-shell {
  width: min(1880px, 100%);
  margin: 0 auto;
}

.panel,
.titlebar {
  background: linear-gradient(180deg, rgba(20, 28, 43, 0.98), rgba(13, 18, 28, 0.98));
  border: 1px solid var(--line);
  border-radius: 18px;
  box-shadow: var(--shadow);
}

.titlebar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding: 14px 18px;
}

.titlebar-right {
  display: grid;
  justify-items: end;
  gap: 8px;
}

.titlebar-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 34px;
  padding: 7px 14px;
  border: 1px solid rgba(255, 158, 181, 0.32);
  border-radius: 999px;
  color: #ffe6ee;
  text-decoration: none;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.02em;
  background: linear-gradient(180deg, rgba(98, 30, 49, 0.95), rgba(63, 17, 31, 0.95));
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.08);
  transition: border-color 120ms ease, transform 120ms ease, filter 120ms ease;
}

.titlebar-link:hover {
  border-color: rgba(255, 188, 206, 0.55);
  filter: brightness(1.06);
  transform: translateY(-1px);
}

.titlebar-link:focus-visible {
  outline: 2px solid rgba(255, 202, 216, 0.8);
  outline-offset: 2px;
}

.mic-toolbar {
  display: inline-grid;
  grid-auto-flow: column;
  grid-auto-columns: max-content;
  align-items: center;
  gap: 10px;
}

.mic-toggle-button {
  min-height: 34px;
  padding: 7px 14px;
  border: 1px solid rgba(132, 222, 99, 0.3);
  border-radius: 999px;
  background: linear-gradient(180deg, rgba(25, 63, 28, 0.98), rgba(16, 40, 19, 0.98));
  color: #e7f7dc;
  cursor: pointer;
}

.mic-toggle-button.is-active {
  border-color: rgba(146, 236, 114, 0.55);
  background: linear-gradient(180deg, rgba(33, 86, 37, 0.98), rgba(19, 55, 23, 0.98));
}

.mic-toggle-button:disabled {
  opacity: 0.72;
  cursor: wait;
}

.mic-readout {
  display: grid;
  justify-items: end;
  gap: 2px;
}

.mic-readout strong {
  font-size: 13px;
}

.mic-readout span {
  color: var(--muted);
  font-size: 11px;
}

.eyebrow {
  margin-bottom: 5px;
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--blue);
}

h1 {
  font-size: clamp(26px, 3vw, 34px);
  letter-spacing: 0.04em;
}

h2 {
  font-size: 18px;
  letter-spacing: 0.03em;
}

.titlebar-hint {
  color: var(--muted);
  font-size: 13px;
  text-align: right;
}

.runtime-banner {
  margin: 10px 0 0;
  padding: 12px 14px;
  border: 1px solid rgba(242, 204, 99, 0.38);
  border-radius: 14px;
  background: linear-gradient(180deg, rgba(72, 53, 17, 0.96), rgba(49, 34, 9, 0.98));
  color: #fff2c9;
  font-size: 13px;
  line-height: 1.45;
  box-shadow: var(--shadow);
}

.workspace {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
  margin-top: 10px;
  align-items: start;
}

.panel {
  padding: 14px;
}

.stage-panel,
.circle-panel,
.overlay-panel,
.chord-panel {
  min-height: 0;
}

.stage-panel {
  display: grid;
  grid-template-rows: auto auto auto;
  gap: 10px;
  align-self: start;
}

.stage-main,
.explorer-row {
  display: grid;
  gap: 10px;
}

.stage-main {
  grid-template-columns: minmax(0, 1fr) minmax(240px, 280px) minmax(250px, 310px);
  grid-template-areas:
    "fretboard info circle";
  align-items: stretch;
}

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

.panel-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
}

.panel-head.compact {
  margin-bottom: 10px;
}

.stage-toolbar,
.form-grid,
.tuning-row,
.stage-info-summary {
  display: grid;
  gap: 10px;
}

.stage-panel > .panel-head {
  display: block;
}

.stage-toolbar {
  grid-template-columns: auto minmax(0, 1fr) auto;
  grid-template-areas: "instrument switch options";
  align-items: end;
  width: 100%;
}

.instrument-switch {
  grid-area: instrument;
  justify-self: start;
  margin-inline: 0;
}

.stage-options {
  grid-area: options;
  justify-self: end;
  display: grid;
  grid-template-columns: minmax(160px, 190px) auto;
  gap: 10px;
  align-items: end;
}

.stage-options.is-vocal-stage {
  grid-template-columns: auto;
}

.view-switch {
  grid-area: switch;
  justify-self: center;
  margin-inline: auto;
  display: inline-grid;
  grid-auto-flow: column;
  grid-auto-columns: max-content;
  gap: 8px;
  padding: 4px;
  border: 1px solid #334a68;
  border-radius: 12px;
  background: rgba(15, 23, 36, 0.75);
}

.instrument-switch.view-switch {
  grid-area: instrument;
  justify-self: start;
  margin-inline: 0;
}

.view-button {
  padding: 8px 14px;
  border: 1px solid transparent;
  border-radius: 10px;
  cursor: pointer;
  color: #dce8f8;
  background: transparent;
}

.view-button.is-active {
  background: linear-gradient(180deg, rgba(47, 67, 100, 1), rgba(34, 49, 77, 1));
  border-color: #5b7ba3;
  color: #ffffff;
}

.view-open-button {
  border-color: #5d6f39;
  color: #d8efc9;
}

.view-button.is-hidden {
  display: none;
}

.is-hidden {
  display: none !important;
}

.field,
.toggle-field {
  display: grid;
  gap: 6px;
}

.field span,
.field-label {
  color: var(--blue);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-weight: 700;
}

.compact-field {
  min-width: 0;
}

.toggle-field {
  align-items: center;
  color: var(--blue-2);
  font-size: 13px;
}

.toggle-field input {
  margin-right: 8px;
}

.keyboard-toggle-field {
  grid-column: 1 / -1;
  justify-self: end;
  white-space: nowrap;
}

select,
input[type="number"] {
  width: 100%;
  background: #22314d;
  color: #ffffff;
  border: 1px solid #30455f;
  border-radius: 10px;
  padding: 9px 10px;
  outline: none;
}

.tuning-row {
  grid-template-columns: repeat(6, minmax(0, 1fr));
}

.tuning-control {
  background: rgba(26, 36, 56, 0.94);
  border: 1px solid #314761;
  border-radius: 12px;
  padding: 9px;
}

.tuning-control label {
  display: grid;
  gap: 6px;
  color: var(--muted);
  font-size: 12px;
}

.tuning-control small {
  color: var(--muted);
  font-size: 11px;
}

.fretboard-shell {
  grid-area: fretboard;
  aspect-ratio: 1480 / 430;
  min-height: 0;
  display: flex;
  align-items: stretch;
  justify-content: stretch;
  width: 100%;
  padding: 0;
  border-radius: 18px;
  border: 1px solid rgba(255, 255, 255, 0.06);
  background: linear-gradient(180deg, #10161d 0%, #030507 100%);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.03);
  overflow: hidden;
}

#fretboard {
  display: block;
  width: 100%;
  height: auto;
  touch-action: none;
}

.fret-note {
  cursor: pointer;
}

.fret-note .note-label,
.fret-note text,
.fret-note circle[fill="none"] {
  pointer-events: none;
  user-select: none;
}

.fret-note.is-held .note-core {
  filter: brightness(1.08);
}

.vocal-stage {
  display: grid;
  gap: 10px;
}

.vocal-top-controls {
  display: grid;
  grid-template-columns: auto auto minmax(0, 1fr);
  gap: 10px;
  align-items: center;
}

.vocal-toggle-field {
  justify-self: start;
}

.vocal-range-field {
  min-width: 170px;
}

.vocal-live-summary {
  display: grid;
  gap: 4px;
  padding: 10px 12px;
  border-radius: 14px;
  border: 1px solid rgba(55, 82, 119, 0.7);
  background: rgba(18, 28, 43, 0.96);
}

.vocal-live-summary strong {
  font-size: 15px;
}

.vocal-live-summary span {
  color: var(--muted);
  font-size: 12px;
}

.vocal-grid {
  display: grid;
  grid-template-columns: minmax(250px, 300px) minmax(0, 1fr);
  gap: 10px;
}

.vocal-card {
  padding: 8px;
  border-radius: 18px;
  border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(18, 25, 38, 0.96), rgba(10, 15, 22, 0.98));
}

.vocal-card svg {
  display: block;
  width: 100%;
  height: auto;
}

.vocal-lane-card svg {
  aspect-ratio: 300 / 430;
}

.vocal-history-card svg {
  aspect-ratio: 860 / 430;
}

.vocal-trend-card svg {
  aspect-ratio: 1180 / 124;
}

.vocal-hint {
  margin-top: -2px;
}

.theory-info-panel {
  grid-area: info;
  display: grid;
  grid-template-rows: auto auto minmax(0, 1fr);
  gap: 10px;
}

.stage-info-summary {
  grid-template-columns: 1fr;
}

.footer-card,
.detail-stack,
.sidebar-copy {
  background: rgba(26, 36, 56, 0.92);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 10px;
}

.footer-label {
  display: block;
  color: var(--muted);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 6px;
}

.footer-card strong,
.detail-line strong {
  display: block;
  color: var(--text);
  font-size: 14px;
  line-height: 1.35;
}

.circle-panel,
.theory-info-panel,
.overlay-panel,
.chord-panel {
  display: grid;
  transition: opacity 140ms ease, filter 140ms ease, border-color 140ms ease;
}

.panel.is-muted {
  opacity: 0.42;
  filter: saturate(0.45);
  border-color: rgba(90, 103, 120, 0.55);
}

.circle-panel {
  grid-template-rows: auto minmax(0, 1fr) auto auto;
}

.stage-circle {
  grid-area: circle;
  align-self: stretch;
  padding: 12px;
  box-shadow: none;
}

.circle-wrap {
  display: flex;
  justify-content: center;
  align-items: flex-end;
  min-height: 0;
  padding-top: 6px;
}

#circleOfFifths {
  width: min(100%, 380px);
  height: auto;
}

#circleOfFifths .circle-chord-hotspot {
  cursor: pointer;
}

#circleOfFifths .circle-chord-hit {
  fill: rgba(255, 255, 255, 0.001);
  stroke: rgba(255, 255, 255, 0);
}

#circleOfFifths .circle-chord-hotspot:hover .circle-chord-hit {
  fill: rgba(255, 255, 255, 0.05);
}

.circle-controls {
  display: grid;
  grid-template-columns: repeat(3, max-content);
  align-items: center;
  gap: 8px;
  margin-top: 6px;
}

.circle-rotate-button {
  padding: 7px 12px;
  border: 1px solid #334a68;
  border-radius: 10px;
  background: #22314d;
  color: #ffffff;
  cursor: pointer;
}

.circle-rotate-button:disabled {
  background: #162132;
  border-color: #26384f;
  color: #6f8298;
  cursor: default;
}

.circle-mode-note {
  grid-column: 1 / -1;
  color: var(--muted);
  font-size: 12px;
}

.circle-open-mode-toggle {
  display: inline-flex;
  gap: 8px;
  margin-top: 6px;
}

.circle-mode-button {
  padding: 6px 12px;
  border: 1px solid #334a68;
  border-radius: 999px;
  background: #162132;
  color: #c9d8ea;
  cursor: pointer;
}

.circle-mode-button.is-active {
  background: #284569;
  border-color: #5f87b5;
  color: #ffffff;
}

.sidebar-copy {
  display: grid;
  gap: 4px;
  color: var(--blue-2);
}

#circleSummary {
  font-weight: 700;
  color: var(--amber);
}

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

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

.form-grid.three {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.degree-wrap {
  display: grid;
  gap: 8px;
}

.degree-wrap.is-hidden {
  display: none;
}

.degree-pills {
  display: grid;
  grid-template-columns: repeat(7, minmax(0, 1fr));
  gap: 8px;
}

.theory-info-panel .degree-pills {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.degree-pill {
  padding: 8px 0;
  border-radius: 999px;
  border: 1px solid #34516d;
  background: rgba(23, 35, 54, 0.92);
  color: #dce8f8;
  cursor: pointer;
}

.degree-pill.is-active {
  background: rgba(242, 204, 99, 0.16);
  border-color: rgba(255, 217, 143, 0.72);
  color: #fff2c8;
}

.detail-stack {
  display: grid;
  gap: 10px;
  align-content: start;
}

.stage-detail-stack {
  min-height: 0;
  overflow: auto;
}

.stage-detail-stack.is-hidden {
  display: none;
}

.detail-line {
  display: grid;
  gap: 4px;
}

.detail-line span {
  color: var(--muted);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.helper-copy {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.45;
}

@media (min-width: 1100px) {
  html,
  body {
    height: 100%;
  }

  body {
    overflow-x: hidden;
    overflow-y: auto;
  }

  .app-shell {
    min-height: calc(100vh - 20px);
    display: grid;
    grid-template-rows: auto minmax(0, 1fr);
    gap: 8px;
  }

  .titlebar {
    padding: 10px 18px;
  }

  h1 {
    font-size: clamp(24px, 2.5vw, 30px);
  }

  .titlebar-hint {
    font-size: 12px;
  }

  .workspace {
    min-height: 0;
    grid-template-rows: auto minmax(0, 1fr);
    gap: 8px;
    margin-top: 8px;
  }

  .panel {
    padding: 10px;
  }

  .stage-panel {
    grid-template-rows: auto auto auto;
    gap: 8px;
  }

  .panel-head {
    gap: 12px;
  }

  .panel-head.compact {
    margin-bottom: 6px;
  }

  .stage-toolbar,
  .form-grid,
  .tuning-row,
  .stage-info-summary,
  .explorer-row {
    gap: 8px;
  }

  .stage-toolbar {
    grid-template-columns: auto minmax(0, 1fr) auto;
  }

  .view-switch {
    gap: 4px;
    padding: 3px;
  }

  .view-button {
    padding: 7px 12px;
  }

  .stage-options {
    grid-template-columns: minmax(150px, 182px) auto;
    gap: 8px;
  }

  .vocal-top-controls {
    grid-template-columns: auto minmax(150px, 180px) minmax(0, 1fr);
    gap: 8px;
  }

  .field span,
  .field-label,
  .footer-label,
  .detail-line span {
    font-size: 10px;
  }

  .toggle-field {
    font-size: 12px;
  }

  .toggle-field input {
    margin-right: 6px;
  }

  select,
  input[type="number"] {
    padding: 7px 9px;
  }

  .tuning-control {
    padding: 6px 8px;
    border-radius: 10px;
  }

  .tuning-control label {
    gap: 3px;
    font-size: 11px;
  }

  .tuning-control small {
    display: none;
  }

  .stage-main {
    gap: 8px;
    align-items: stretch;
    grid-template-columns: minmax(0, 1fr) minmax(220px, 250px) minmax(235px, 280px);
  }

  .fretboard-shell {
    max-width: none;
    justify-self: stretch;
  }

  .footer-card,
  .detail-stack,
  .sidebar-copy {
    padding: 8px;
    border-radius: 12px;
  }

  .footer-label {
    margin-bottom: 4px;
  }

  .footer-card strong,
  .detail-line strong {
    font-size: 13px;
  }

  .stage-circle {
    padding: 10px;
  }

  .theory-info-panel {
    padding: 10px;
    gap: 8px;
  }

  #circleOfFifths {
    width: clamp(200px, 14vw, 240px);
  }

  .circle-controls {
    gap: 6px;
  }

  .circle-rotate-button {
    padding: 6px 10px;
  }

  .circle-mode-note {
    font-size: 11px;
  }

  .circle-open-mode-toggle {
    gap: 6px;
  }

  .circle-mode-button {
    padding: 5px 10px;
  }

  .explorer-row {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 1fr);
    align-items: start;
  }

  .overlay-panel,
  .chord-panel {
    padding: 10px;
    grid-template-rows: auto auto;
    min-height: auto;
    overflow: visible;
  }

  .overlay-panel h2,
  .chord-panel h2 {
    font-size: 16px;
  }

  .detail-stack {
    gap: 8px;
  }

  .helper-copy {
    font-size: 12px;
    line-height: 1.3;
  }
}

@media (max-width: 1320px) {
  .stage-main {
    grid-template-columns: minmax(0, 1fr) minmax(250px, 300px);
    grid-template-areas:
      "fretboard fretboard"
      "info circle";
  }

  .stage-circle {
    max-width: none;
  }
}

@media (max-width: 1099px) {
  body {
    padding: 8px;
  }

  .titlebar {
    flex-wrap: wrap;
    align-items: center;
  }

  .titlebar-right {
    margin-left: auto;
    justify-items: end;
  }

  .stage-panel > .panel-head {
    display: block;
  }

  .stage-toolbar {
    grid-template-columns: auto minmax(0, 1fr) auto;
    align-items: end;
  }

  .stage-options {
    grid-template-columns: minmax(180px, 220px) auto;
  }

  .vocal-grid {
    grid-template-columns: 1fr;
  }

  .vocal-lane-card {
    max-width: 360px;
  }

  .toggle-field {
    justify-self: auto;
  }

  .tuning-row {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .form-grid.two,
  .form-grid.three {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 820px) {
  .stage-main {
    grid-template-columns: 1fr;
    grid-template-areas:
      "fretboard"
      "info"
      "circle";
  }

  .titlebar {
    align-items: start;
    flex-direction: column;
    flex-wrap: nowrap;
  }

  .titlebar-right {
    justify-items: start;
    margin-left: 0;
  }

  .stage-toolbar {
    grid-template-columns: 1fr;
    align-items: stretch;
    grid-template-areas:
      "instrument"
      "switch"
      "options";
  }

  .stage-options {
    grid-template-columns: 1fr;
    justify-self: stretch;
  }

  .instrument-switch,
  .view-switch {
    justify-self: center;
  }

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

  .mic-toolbar {
    grid-auto-flow: row;
    justify-items: start;
  }

  .tuning-row,
  .stage-info-summary,
  .explorer-row,
  .form-grid.two,
  .form-grid.three {
    grid-template-columns: 1fr;
  }
}