/* ── Tool screens layout ── */
.screen-tool {
  align-items: stretch;
  justify-content: flex-start;
  padding: 0.2rem 0 0.35rem;
  width: 100%;
  max-width: none;
  margin: 0;
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  max-height: calc(100dvh - var(--top-bar-height) - var(--piano-offset) - 0.25rem);
}

.tool-page-header {
  width: 100%;
  margin-bottom: 0.5rem;
  flex-shrink: 0;
}

.tool-page-header-inset h2 {
  font-size: 1.2rem;
}

.tool-page-header-inset p {
  font-size: 0.8rem;
  line-height: 1.35;
}

.tool-page-header h2 {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text);
  margin-bottom: 0.2rem;
}

.tool-page-header p {
  font-size: 0.85rem;
  color: var(--text-dim);
}

.tool-layout {
  display: grid;
  grid-template-columns: 1fr minmax(260px, 340px);
  gap: 1rem;
  width: 100%;
  align-items: start;
}

.tool-layout.single-column {
  grid-template-columns: 1fr;
  max-width: 520px;
  margin: 0 auto;
}

.chord-degree-ref-panel {
  margin-bottom: 1rem;
  padding-bottom: 0.85rem;
  border-bottom: 1px solid var(--border);
}

.chord-degree-ref-panel .chart-section-title {
  margin-bottom: 0.25rem;
}

.chord-formula-hint {
  margin-bottom: 0.65rem;
}

.chord-degree-ref-panel .degree-chart-full {
  margin-top: 0.35rem;
}

.chord-degree-ref-panel .degree-chart-cell {
  padding: 0.5rem 0.35rem;
}

.chord-degree-ref-panel .degree-chart-cell .dc-quality {
  font-size: 0.62rem;
}

.tool-main {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 1rem;
  box-shadow: var(--shadow-lg);
}

.tool-sidebar {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 1.1rem;
  box-shadow: var(--shadow);
  position: sticky;
  top: 0.5rem;
  max-height: calc(100vh - 240px);
  overflow-y: auto;
}

.tool-sidebar h3 {
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--text);
  margin-bottom: 0.65rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border);
}

.tool-sidebar .detail-row {
  margin-bottom: 0.75rem;
}

.tool-sidebar .detail-label {
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  font-weight: 700;
  margin-bottom: 0.2rem;
}

.tool-sidebar .detail-value {
  font-size: 0.88rem;
  color: var(--text);
  line-height: 1.45;
}

.tool-sidebar .detail-value.accent {
  color: var(--accent-strong);
  font-weight: 700;
}

.tool-sidebar .chord-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-top: 0.25rem;
}

.tool-sidebar .mini-chord {
  padding: 0.25rem 0.5rem;
  border-radius: 6px;
  background: var(--chip-bg);
  border: 1px solid var(--chip-border);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--accent-strong);
  cursor: pointer;
}

.tool-sidebar .mini-chord:hover {
  background: var(--accent-soft);
}

.tool-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  align-items: center;
  margin-bottom: 1rem;
}

.tool-controls label {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--text-dim);
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.tool-select {
  padding: 0.45rem 0.65rem;
  border-radius: 8px;
  border: 1px solid var(--border-strong);
  background: var(--bg-panel);
  color: var(--text);
  font-family: inherit;
  font-size: 0.85rem;
  font-weight: 600;
  min-width: 140px;
}

.tool-btn {
  padding: 0.5rem 1rem;
  border-radius: 10px;
  border: none;
  font-family: inherit;
  font-weight: 700;
  font-size: 0.85rem;
  cursor: pointer;
  transition: transform 0.15s;
}

.tool-btn.primary {
  background: linear-gradient(135deg, #0ea5e9, #6366f1);
  color: #fff;
}

.tool-btn.secondary {
  background: var(--btn-secondary-bg);
  color: var(--text);
  border: 1px solid var(--border-strong);
}

.tool-btn:hover {
  transform: scale(1.02);
}

#screen-tool-circle.active {
  animation: none;
}

/* Circle tool — guide left, wheel center, details right */
.tool-layout-circle {
  grid-template-columns: minmax(180px, 220px) 1fr minmax(240px, 300px);
  align-items: stretch;
  gap: 0.75rem;
}

.tool-main-circle {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0.5rem 0.25rem;
  min-height: min(560px, calc(100dvh - var(--top-bar-height) - var(--piano-offset) - 7rem));
}

.tool-circle-wrap {
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100%;
  margin: 0;
}

.tool-circle-wrap .circle-wrap {
  width: min(560px, 100%);
  height: min(560px, calc(100dvh - var(--top-bar-height) - var(--piano-offset) - 8rem));
  max-width: 100%;
  margin: 0;
}

.circle-guide-panel {
  padding: 1rem;
  border-radius: 14px;
  background: var(--accent-soft);
  border: 1px solid var(--chip-border);
  font-size: 0.8rem;
  color: var(--text-dim);
  line-height: 1.5;
}

.circle-guide-panel h4 {
  font-size: 0.85rem;
  font-weight: 800;
  color: var(--accent-strong);
  margin-bottom: 0.6rem;
}

.circle-guide-panel ul {
  margin: 0;
  padding-left: 1rem;
}

.circle-guide-panel li {
  margin-bottom: 0.45rem;
}

.circle-guide-panel strong {
  color: var(--text);
}

.tool-circle-svg .circle-key {
  cursor: pointer;
}

.tool-circle-svg .circle-key:hover {
  opacity: 0.92;
}

.tool-circle-svg .circle-key.active {
  stroke: var(--accent-strong);
  stroke-width: 3;
}

.tool-circle-svg .circle-key:focus {
  outline: none;
}

/* Progressions */
.prog-visual {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  justify-content: center;
  margin: 1rem 0;
}

.prog-block {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.3rem;
}

.prog-block .roman {
  font-size: 0.7rem;
  color: var(--text-muted);
  font-weight: 700;
}

.prog-block .chord-name {
  padding: 0.65rem 1rem;
  border-radius: 12px;
  background: var(--accent-warm-soft);
  border: 2px solid var(--accent-warm);
  font-weight: 800;
  font-size: 1.1rem;
  color: var(--accent-warm);
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.15s;
  min-width: 3.5rem;
  text-align: center;
}

.prog-block .chord-name.playing {
  transform: scale(1.08);
  box-shadow: 0 0 20px var(--accent-warm-soft);
}

.prog-block-arrow {
  color: var(--text-muted);
  font-size: 1.25rem;
  align-self: center;
}

/* Nashville practice */
.degree-practice-card {
  text-align: center;
  padding: 1.5rem 1rem;
}

.degree-big {
  font-size: 4rem;
  font-weight: 800;
  color: var(--accent-strong);
  line-height: 1;
}

.degree-chord-target {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text);
  margin-top: 0.5rem;
}

.degree-hint {
  font-size: 0.9rem;
  color: var(--text-dim);
  margin-top: 0.75rem;
}

.degree-grid-practice {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.45rem;
  margin-top: 1rem;
}

.degree-cell {
  padding: 0.6rem;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--btn-secondary-bg);
  text-align: center;
  cursor: pointer;
  transition: all 0.15s;
}

.degree-cell .n {
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--accent-strong);
}

.degree-cell .c {
  font-size: 0.65rem;
  color: var(--text-dim);
}

.degree-cell.active {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.degree-cell.correct {
  border-color: var(--success);
  background: var(--success-soft);
}

.degree-cell.wrong {
  border-color: var(--error);
  background: var(--error-soft);
}

.practice-feedback {
  margin-top: 0.75rem;
  font-weight: 600;
  min-height: 1.25em;
}

/* BPM tool — controls left, hero center, details right */
.tool-layout-bpm {
  grid-template-columns: minmax(200px, 240px) 1fr minmax(220px, 280px);
  align-items: stretch;
  gap: 0.75rem;
}

.bpm-controls-panel {
  display: flex;
  flex-direction: column;
  padding: 1rem;
  border-radius: 14px;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}

.bpm-panel-title {
  font-size: 0.8rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: 0.85rem;
}

.bpm-control-block {
  margin-bottom: 1rem;
}

.bpm-control-label {
  display: block;
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--text-dim);
  margin-bottom: 0.4rem;
}

.bpm-slider-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.bpm-slider-min,
.bpm-slider-max {
  font-size: 0.7rem;
  color: var(--text-muted);
  font-weight: 600;
  flex-shrink: 0;
}

.bpm-slider {
  flex: 1;
  width: 100%;
  accent-color: var(--accent-strong);
}

.bpm-mode-toggle {
  display: flex;
  width: 100%;
  border-radius: 10px;
  border: 1px solid var(--border);
  overflow: hidden;
}

.bpm-mode-btn {
  flex: 1;
  padding: 0.5rem 0.5rem;
  border: none;
  background: var(--btn-secondary-bg);
  color: var(--text-dim);
  font-family: inherit;
  font-size: 0.78rem;
  font-weight: 700;
  cursor: pointer;
}

.bpm-mode-btn.active {
  background: var(--accent-soft);
  color: var(--accent-strong);
}

.bpm-straight-toggle {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.2rem;
  cursor: pointer;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text);
}

.bpm-straight-toggle input {
  width: 1rem;
  height: 1rem;
  accent-color: var(--accent-strong);
  cursor: pointer;
}

.bpm-straight-toggle small {
  font-size: 0.68rem;
  font-weight: 500;
  color: var(--text-dim);
}

.bpm-preset-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}

.bpm-preset-row .bpm-chip {
  flex: 1 1 calc(33% - 0.35rem);
  min-width: 2.5rem;
  text-align: center;
}

.bpm-transport {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  margin-top: auto;
  padding-top: 0.5rem;
}

.bpm-transport-btn {
  width: 100%;
  justify-content: center;
}

.bpm-hero {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0.5rem 0.25rem;
  min-height: min(420px, 55vh);
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 16px;
  box-shadow: var(--shadow-lg);
}

.bpm-hero-inner {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 100%;
  text-align: center;
}

.bpm-tool-value {
  font-size: clamp(4.5rem, 18vw, 7.5rem);
  font-weight: 800;
  color: var(--accent-strong);
  font-variant-numeric: tabular-nums;
  line-height: 0.95;
  letter-spacing: -0.04em;
  position: relative;
  z-index: 2;
}

.bpm-tool-label {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-dim);
  margin-top: 0.35rem;
  z-index: 2;
}

.bpm-hero-status {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin: 0.5rem 0 1rem;
  z-index: 2;
}

.bpm-pulse-ring {
  position: absolute;
  top: 50%;
  left: 50%;
  width: min(280px, 75vw);
  height: min(280px, 75vw);
  margin: 0;
  transform: translate(-50%, -58%);
  border-radius: 50%;
  background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
  opacity: 0.4;
  z-index: 0;
  pointer-events: none;
}

.bpm-pulse-ring.running {
  animation: bpmToolPulse var(--beat-dur, 0.5s) ease infinite;
}

@keyframes bpmToolPulse {
  0%, 100% { transform: translate(-50%, -58%) scale(0.92); opacity: 0.2; }
  50% { transform: translate(-50%, -58%) scale(1.05); opacity: 0.55; }
}

.bpm-tap-zone {
  position: relative;
  z-index: 2;
  width: min(220px, 55vw);
  height: min(220px, 55vw);
  max-width: 260px;
  max-height: 260px;
  border-radius: 50%;
  border: 3px solid var(--accent);
  background: var(--accent-soft);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  user-select: none;
  transition: transform 0.08s, box-shadow 0.15s;
  box-shadow: 0 0 40px var(--accent-glow);
}

.bpm-tap-zone.tapped {
  transform: scale(0.96);
  box-shadow: 0 0 20px var(--accent-glow);
}

.bpm-tap-zone:active {
  transform: scale(0.94);
}

.bpm-tap-zone .tap-title {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--accent-strong);
}

.bpm-tap-zone .tap-sub {
  font-size: 0.78rem;
  color: var(--text-dim);
  margin-top: 0.3rem;
  max-width: 12rem;
  line-height: 1.3;
}

.bpm-details-sidebar .detail-row {
  margin-bottom: 0.65rem;
}

.chart-section-title {
  font-size: 0.95rem;
  font-weight: 800;
  color: var(--text);
  margin: 1rem 0 0.35rem;
}

.chart-section-hint {
  font-size: 0.78rem;
  color: var(--text-dim);
  margin-bottom: 0.65rem;
}

.degree-chart-full {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 0.4rem;
  margin-bottom: 0.5rem;
}

.degree-chart-cell {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.15rem;
  padding: 0.55rem 0.35rem;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--btn-secondary-bg);
  cursor: pointer;
  font-family: inherit;
  transition: all 0.15s;
  color: var(--text);
}

.degree-chart-cell .dc-num {
  font-size: 0.65rem;
  font-weight: 700;
  color: var(--text-muted);
}

.degree-chart-cell .dc-roman {
  font-size: 0.95rem;
  font-weight: 800;
  color: var(--accent-strong);
}

.degree-chart-cell .dc-chord {
  font-size: 0.85rem;
  font-weight: 700;
}

.degree-chart-cell .dc-quality {
  font-size: 0.6rem;
  color: var(--text-dim);
  text-transform: capitalize;
}

.degree-chart-cell:hover {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.degree-picker-row {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 0.4rem;
  margin-bottom: 0.5rem;
}

.degree-pick-btn {
  padding: 0.55rem 0.25rem;
  border-radius: 10px;
  border: 2px solid var(--border);
  background: var(--bg-panel);
  color: var(--text);
  font-family: inherit;
  font-size: 1rem;
  font-weight: 800;
  cursor: pointer;
  transition: all 0.15s;
  box-shadow: var(--shadow);
}

.degree-pick-btn:hover {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.degree-pick-btn.active {
  border-color: var(--gold);
  background: rgba(217, 119, 6, 0.12);
  color: var(--gold);
  box-shadow: 0 0 0 3px rgba(217, 119, 6, 0.2);
}

.degree-chart-cell.selected {
  border-color: var(--gold);
  background: rgba(217, 119, 6, 0.1);
  box-shadow: 0 0 0 2px rgba(217, 119, 6, 0.25);
}

.degree-chart-cell.selected .dc-num {
  color: var(--gold);
  font-weight: 800;
}

.degree-chart-cell.playing {
  transform: scale(1.04);
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.prog-play-degree-btn {
  margin-top: 0.5rem;
  width: 100%;
}

.degree-chart-cell.in-progression {
  border-color: var(--accent-warm);
  background: var(--accent-warm-soft);
  box-shadow: 0 0 12px var(--accent-warm-soft);
}

.chord-tier-title {
  font-size: 0.8rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--accent-strong);
  margin: 1rem 0 0.5rem;
  padding-top: 0.5rem;
  border-top: 1px solid var(--border);
}

.chord-tier-title:first-child {
  margin-top: 0;
  padding-top: 0;
  border-top: none;
}

.chord-structure-card {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 0.65rem;
  width: 100%;
  padding: 0.7rem 0.85rem;
  margin-bottom: 0.4rem;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--bg-panel);
  cursor: pointer;
  text-align: left;
  font-family: inherit;
  transition: all 0.15s;
  color: var(--text);
}

.chord-structure-card:hover {
  border-color: var(--accent);
  background: var(--surface-hover);
}

.chord-structure-card.selected {
  border-color: var(--accent-strong);
  background: var(--accent-soft);
  box-shadow: 0 0 16px var(--accent-glow);
}

.chord-structure-card .csc-symbol {
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--accent-warm);
  min-width: 3.5rem;
}

.chord-structure-card .csc-name {
  font-size: 0.88rem;
  font-weight: 700;
}

.chord-structure-card .csc-formula {
  font-size: 0.75rem;
  color: var(--text-dim);
  font-weight: 600;
}

/* Modal scales */
.modes-degree-ref-panel {
  margin-bottom: 1rem;
  padding-bottom: 0.85rem;
  border-bottom: 1px solid var(--border);
}

.modes-degree-ref-panel .chart-section-title {
  margin-top: 0;
}

.scale-degree-row {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 0.4rem;
}

.scale-degree-cell {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.12rem;
  padding: 0.5rem 0.3rem;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--btn-secondary-bg);
  cursor: pointer;
  font-family: inherit;
  color: var(--text);
  transition: border-color 0.12s, background 0.12s;
}

.scale-degree-cell:hover {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.scale-degree-cell.root-degree {
  border-color: var(--accent-warm);
  background: var(--accent-warm-soft);
}

.scale-degree-cell.playing {
  border-color: var(--accent);
  background: var(--accent-soft);
  box-shadow: 0 0 0 2px var(--accent-glow);
}

.scale-degree-cell .sd-num {
  font-size: 0.65rem;
  font-weight: 800;
  color: var(--text-muted);
}

.scale-degree-cell .sd-interval {
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--accent-strong);
}

.scale-degree-cell .sd-note {
  font-size: 0.8rem;
  font-weight: 800;
}

.mode-cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 0.5rem;
}

.mode-scale-card {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.2rem;
  padding: 0.75rem 0.85rem;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--btn-secondary-bg);
  cursor: pointer;
  font-family: inherit;
  text-align: left;
  color: var(--text);
  transition: border-color 0.15s, background 0.15s;
}

.mode-scale-card:hover {
  border-color: var(--accent);
}

.mode-scale-card.selected {
  border-color: var(--accent-warm);
  background: var(--accent-warm-soft);
  box-shadow: 0 0 0 2px var(--accent-warm-soft);
}

.mode-scale-card .msc-name {
  font-size: 0.95rem;
  font-weight: 800;
}

.mode-scale-card .msc-alias {
  font-size: 0.72rem;
  color: var(--accent-strong);
  font-weight: 700;
}

.mode-scale-card .msc-formula {
  font-size: 0.68rem;
  color: var(--text-dim);
  font-weight: 600;
}

/* Time signatures */
.timesig-display {
  font-size: 3rem;
  font-weight: 800;
  text-align: center;
  color: var(--accent-strong);
  margin: 0.5rem 0 0.25rem;
}

.timesig-grouping {
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-dim);
  margin-bottom: 1rem;
}

.timesig-bpm-val {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text);
  min-width: 2rem;
}

.timesig-beat-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  justify-content: center;
  margin-top: 0.5rem;
}

.timesig-beat {
  min-width: 2.4rem;
  padding: 0.55rem 0.5rem;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--btn-secondary-bg);
  font-weight: 700;
  font-size: 0.85rem;
  text-align: center;
  color: var(--text-dim);
  transition: background 0.1s, color 0.1s, border-color 0.1s;
}

.timesig-beat.accent {
  border-color: var(--chip-border);
  background: var(--accent-soft);
}

.timesig-beat.active {
  background: var(--accent);
  color: var(--bubble-text);
  border-color: var(--accent-strong);
  transform: scale(1.05);
}

/* Intervals */
.interval-cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
  gap: 0.45rem;
}

.interval-card {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.15rem;
  padding: 0.65rem 0.75rem;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--btn-secondary-bg);
  cursor: pointer;
  font-family: inherit;
  text-align: left;
  color: var(--text);
}

.interval-card:hover {
  border-color: var(--accent);
}

.interval-card.selected {
  border-color: var(--gold);
  background: rgba(217, 119, 6, 0.1);
}

.interval-card .ic-short {
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--accent-strong);
}

.interval-card .ic-name {
  font-size: 0.72rem;
  font-weight: 700;
}

.interval-card .ic-top {
  font-size: 0.68rem;
  color: var(--text-dim);
}

@media (max-width: 960px) {
  .tool-layout-bpm {
    grid-template-columns: 1fr minmax(200px, 260px);
  }
  .bpm-controls-panel {
    grid-column: 1 / -1;
    order: 2;
  }
  .bpm-hero {
    order: 1;
    min-height: min(380px, 50vh);
  }
  .bpm-details-sidebar {
    order: 3;
  }
}

@media (max-width: 900px) {
  .tool-layout-circle {
    grid-template-columns: 1fr minmax(220px, 280px);
  }
  .circle-guide-panel {
    grid-column: 1 / -1;
    order: -1;
  }
  .tool-main-circle {
    min-height: min(440px, 55vh);
  }
  .tool-circle-wrap .circle-wrap {
    width: min(440px, 92vw);
    height: min(440px, 55vh);
  }
}

@media (max-width: 768px) {
  #screen-tool-bpm.screen-tool {
    overflow: hidden;
    padding-bottom: 0;
  }

  #screen-tool-bpm .tool-page-header-inset p {
    display: none;
  }

  #screen-tool-bpm .tool-page-header {
    margin-bottom: 0.15rem;
  }

  #screen-tool-bpm .tool-page-header-inset h2 {
    font-size: 1.05rem;
  }

  #screen-tool-bpm .tool-layout-bpm {
    grid-template-columns: 1fr;
    flex: 1;
    min-height: 0;
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
    overflow: hidden;
  }

  #screen-tool-bpm .bpm-hero {
    order: 1;
    flex: 1;
    min-height: 0;
    padding: 0.2rem 0.35rem;
  }

  #screen-tool-bpm .bpm-hero-inner {
    justify-content: center;
    gap: 0.35rem;
    height: 100%;
  }

  #screen-tool-bpm .bpm-tool-value {
    font-size: clamp(2.6rem, 13vw, 3.4rem);
    line-height: 1;
  }

  #screen-tool-bpm .bpm-tool-label {
    font-size: 0.72rem;
    margin-top: 0;
  }

  #screen-tool-bpm .bpm-hero-status {
    font-size: 0.68rem;
    margin: 0.15rem 0 0.25rem;
  }

  #screen-tool-bpm .bpm-tap-zone {
    width: min(128px, 36vw);
    height: min(128px, 36vw);
    border-width: 2px;
  }

  #screen-tool-bpm .bpm-tap-zone .tap-title {
    font-size: 1.1rem;
  }

  #screen-tool-bpm .bpm-tap-zone .tap-sub {
    font-size: 0.65rem;
  }

  #screen-tool-bpm .bpm-pulse-ring {
    width: min(150px, 42vw);
    height: min(150px, 42vw);
  }

  #screen-tool-bpm .bpm-controls-panel {
    order: 2;
    flex-shrink: 0;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.35rem 0.45rem;
    padding: 0.55rem 0.6rem;
    margin: 0;
  }

  #screen-tool-bpm .bpm-panel-title {
    display: none;
  }

  #screen-tool-bpm .bpm-transport {
    grid-column: 1 / -1;
    flex-direction: row;
    order: -1;
    margin: 0;
    padding-top: 0;
    gap: 0.35rem;
  }

  #screen-tool-bpm .bpm-transport-btn {
    flex: 1;
    padding: 0.55rem 0.5rem;
    font-size: 0.82rem;
  }

  #screen-tool-bpm .bpm-control-block {
    margin-bottom: 0;
  }

  #screen-tool-bpm .bpm-control-block-tempo {
    grid-column: 1 / -1;
  }

  #screen-tool-bpm .bpm-control-block-presets {
    grid-column: 1 / -1;
  }

  #screen-tool-bpm .bpm-control-label {
    font-size: 0.65rem;
    margin-bottom: 0.25rem;
  }

  #screen-tool-bpm .bpm-preset-row .bpm-chip {
    flex: 1 1 auto;
    min-width: 2.2rem;
    padding: 0.35rem 0.25rem;
    font-size: 0.75rem;
  }

  #screen-tool-bpm .bpm-details-sidebar {
    display: none;
  }

  .tool-layout-bpm {
    grid-template-columns: 1fr;
  }

  .bpm-controls-panel {
    order: 2;
  }

  .bpm-transport {
    flex-direction: row;
  }

  .bpm-transport-btn {
    flex: 1;
  }

  .scale-degree-row {
    grid-template-columns: repeat(4, 1fr);
  }
  .tool-layout {
    grid-template-columns: 1fr;
  }
  .tool-layout-circle {
    grid-template-columns: 1fr;
  }
  .tool-sidebar {
    position: static;
    max-height: none;
  }
  .tool-circle-wrap .circle-wrap {
    width: min(380px, 94vw);
    height: min(380px, 50vh);
  }
  .degree-grid-practice {
    grid-template-columns: repeat(2, 1fr);
  }
  .degree-chart-full {
    grid-template-columns: repeat(4, 1fr);
  }
}

@media (max-width: 400px) {
  .scale-degree-row {
    grid-template-columns: repeat(2, 1fr);
  }
  .degree-chart-full {
    grid-template-columns: repeat(2, 1fr);
  }
}