/*!
 * Cognote Piano Sight Reading Tool
 * Black-gray theme aligned with the existing Cognote tool UI.
 */
:root {
  --primary-gray: #2f3137;
  --primary-gray-hover: #17191d;
  --primary-gray-active: #0f1013;
  --secondary-gray: #5f636b;
  --neutral-white: #ffffff;
  --neutral-light: #f2f2f7;
  --neutral-medium: #c7c7cc;
  --neutral-dark: #8e8e93;
  --neutral-black: #1d1d1f;
  --body-bg: #f5f5f7;
  --border-color: rgba(0, 0, 0, 0.08);
  --border-color-medium: rgba(0, 0, 0, 0.12);
  --card-shadow: rgba(0, 0, 0, 0.05);
  --card-shadow-hover: rgba(0, 0, 0, 0.12);
  --card-shadow-focus: rgba(47, 49, 55, 0.18);
  --info-bg: #f8f9fa;
  --info-border: #e5e5ea;
  --heading-text: #2f3137;
  --secondary-text: #6c7078;
  --piano-accent-soft: rgba(47, 49, 55, 0.12);
  --piano-accent-focus: rgba(47, 49, 55, 0.18);
  --piano-accent-border: rgba(47, 49, 55, 0.22);
  --neutral-soft: #f2f2f7;
  --neutral-text: #1d1d1f;
  --neutral-text-light: #8e8e93;
  --neutral-text-secondary: #3a3a3c;
  --font-system: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "Helvetica Neue", Helvetica, Arial, "Microsoft YaHei", sans-serif;
}

[data-theme="dark"] {
  --primary-gray: #4a4d55;
  --primary-gray-hover: #5f636b;
  --primary-gray-active: #737780;
  --secondary-gray: #c7c7cc;
  --neutral-white: #2c2c2e;
  --neutral-light: #3a3a3c;
  --neutral-medium: #48484a;
  --neutral-dark: #a1a1aa;
  --neutral-black: #f2f2f7;
  --body-bg: #1d1d1f;
  --border-color: rgba(255, 255, 255, 0.16);
  --border-color-medium: rgba(255, 255, 255, 0.25);
  --card-shadow: rgba(0, 0, 0, 0.42);
  --card-shadow-hover: rgba(0, 0, 0, 0.62);
  --card-shadow-focus: rgba(242, 242, 247, 0.2);
  --info-bg: #3a3a3c;
  --info-border: rgba(255, 255, 255, 0.18);
  --heading-text: #f2f2f7;
  --secondary-text: #a1a1aa;
  --piano-accent-soft: rgba(242, 242, 247, 0.14);
  --piano-accent-focus: rgba(242, 242, 247, 0.2);
  --piano-accent-border: rgba(242, 242, 247, 0.24);
  --neutral-soft: #343438;
  --neutral-text: #f2f2f7;
  --neutral-text-light: #b8b8c1;
  --neutral-text-secondary: #d6d6de;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  min-height: 100vh;
  padding: 20px;
  font-family: var(--font-system);
  line-height: 1.47059;
  font-weight: 400;
  background: var(--body-bg);
  color: var(--neutral-black);
  background-image:
    radial-gradient(circle at 15% 20%, rgba(0, 0, 0, 0.055) 1px, transparent 1px),
    radial-gradient(circle at 85% 35%, rgba(0, 0, 0, 0.045) 1.5px, transparent 1.5px),
    radial-gradient(circle at 25% 70%, rgba(0, 0, 0, 0.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 0, 0, 0.025) 1px, transparent 1px);
  background-size: 200px 200px, 250px 250px, 180px 180px, 100% 60px;
}

[data-theme="dark"] body {
  background-image:
    radial-gradient(circle at 15% 20%, rgba(255, 255, 255, 0.055) 1px, transparent 1px),
    radial-gradient(circle at 85% 35%, rgba(255, 255, 255, 0.045) 1.5px, transparent 1.5px),
    radial-gradient(circle at 25% 70%, rgba(255, 255, 255, 0.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.025) 1px, transparent 1px);
}

.container {
  max-width: 1400px;
  margin: 0 auto;
  overflow: hidden;
  position: relative;
  z-index: 1;
  background: var(--neutral-white);
  border: 1px solid var(--border-color);
  border-top: 8px solid rgba(47, 49, 55, 0.38);
  border-radius: 18px;
  box-shadow: 0 8px 32px var(--card-shadow);
}

.header {
  padding: 40px 30px;
  text-align: center;
  background: rgba(47, 49, 55, 0.035);
  border-bottom: 1px solid var(--border-color-medium);
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  position: relative;
  gap: 24px;
}

.header-text {
  flex: 1;
  min-width: 0;
  text-align: center;
}

.header h1 {
  margin-bottom: 10px;
  font-size: 3.5rem;
  font-weight: 400;
  line-height: 1.1;
  color: var(--neutral-black);
}

.header p {
  color: var(--neutral-dark);
  font-size: 1.2rem;
}

.header-controls {
  position: absolute;
  left: 0;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  z-index: 9997;
  padding: 0;
}

.function-selector {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: stretch;
  z-index: 9998;
}

.settings-dropdown {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  z-index: 9998;
}

.function-btn {
  width: 100%;
  min-width: 120px;
  min-height: 40px;
  padding: 10px 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: 1px solid var(--primary-gray);
  border-radius: 12px;
  background: var(--primary-gray);
  color: #fff !important;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  white-space: nowrap;
  box-shadow: 0 2px 8px rgba(47, 49, 55, 0.3);
  transition: all 0.2s ease;
}

.function-btn span {
  flex: 1 1 auto;
  color: #fff !important;
  text-align: center;
}

.settings-btn {
  min-width: 100px;
  min-height: 40px;
  padding: 10px 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: 1px solid var(--border-color);
  border-radius: 12px;
  background: var(--neutral-white);
  color: var(--neutral-black) !important;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  white-space: nowrap;
  box-shadow: 0 2px 8px var(--card-shadow);
  transition: all 0.2s ease;
}

.function-btn:hover {
  transform: translateY(-1px);
  background: var(--primary-gray-hover);
  border-color: var(--primary-gray-hover);
  color: #fff !important;
  box-shadow: 0 4px 16px rgba(47, 49, 55, 0.4);
}

.function-btn:active {
  transform: translateY(0);
  background: var(--primary-gray-active);
  border-color: var(--primary-gray-active);
  color: #fff !important;
  box-shadow: 0 2px 8px rgba(47, 49, 55, 0.3);
}

.settings-btn:hover {
  transform: translateY(-1px);
  background: var(--neutral-light);
  border-color: var(--border-color-medium);
  color: var(--neutral-black) !important;
  box-shadow: 0 4px 16px var(--card-shadow-hover);
}

.settings-btn:active,
.settings-btn.is-open {
  transform: translateY(0);
  background: var(--neutral-medium);
  color: var(--neutral-black) !important;
  box-shadow: 0 2px 8px var(--card-shadow);
}

.function-menu {
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  z-index: 9999;
  width: 100%;
  min-width: 100%;
  display: block;
  background: var(--neutral-white);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  box-shadow: 0 12px 48px var(--card-shadow-hover);
  overflow: visible;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: all 0.25s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.function-menu.show {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.function-option {
  position: relative;
  z-index: 10000;
  padding: 14px 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  background: var(--neutral-white);
  cursor: pointer;
  color: var(--neutral-black);
  font-size: 14px;
  font-weight: 400;
  text-align: center;
  white-space: nowrap;
  transition: all 0.15s ease;
}

.function-option:first-child {
  border-top-left-radius: 16px;
  border-top-right-radius: 16px;
}

.function-option:last-child {
  border-bottom-left-radius: 16px;
  border-bottom-right-radius: 16px;
}

.function-option span {
  display: block;
  width: 100%;
  text-align: center;
}

.function-option:hover,
.function-option:focus {
  background: var(--piano-accent-soft);
  color: var(--primary-gray-hover);
}

.function-option:active {
  background: var(--primary-gray-active);
  color: #fff;
}

[data-theme="dark"] .function-menu {
  background: var(--neutral-white) !important;
  border-color: var(--border-color) !important;
  box-shadow: 0 16px 64px rgba(0, 0, 0, 0.8) !important;
}

[data-theme="dark"] .function-option {
  background: var(--neutral-white) !important;
  color: var(--neutral-black) !important;
}

[data-theme="dark"] .function-option:hover,
[data-theme="dark"] .function-option:focus {
  background: var(--neutral-medium) !important;
  color: var(--neutral-black) !important;
}

[data-theme="dark"] .function-option:active {
  background: var(--primary-gray-active) !important;
  color: #fff !important;
}

.controls {
  padding: 30px;
  background: #fbfbfd;
  border-bottom: 1px solid var(--border-color-medium);
}

[data-theme="dark"] .controls {
  background: #242426;
}

[data-theme="dark"] .control-row {
  background: transparent;
}

.control-row {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  margin-bottom: 24px;
  align-items: flex-start;
  background: #fbfbfd;
}

.control-row:last-child {
  justify-content: center;
  margin-bottom: 0;
}

.control-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
  flex: 1;
  min-width: 160px;
}

.melody-primary-row {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 24px;
  align-items: stretch;
}

.melody-primary-row .control-group {
  min-width: 0;
}

.melody-secondary-row {
  display: grid;
  gap: 24px;
  align-items: start;
}

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

.melody-secondary-cell {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

button,
select,
input {
  font-family: inherit;
}

.btn-primary,
.btn-secondary,
.melody-visibility-btn,
.metronome-play-btn,
.metronome-settings-btn {
  min-height: 44px;
  border-radius: 14px;
  border: 1px solid var(--border-color);
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-primary {
  padding: 14px 28px;
  color: #fff;
  background: var(--primary-gray);
  border-color: var(--primary-gray);
  font-size: 1.1rem;
  font-weight: 600;
  box-shadow: 0 3px 6px rgba(47, 49, 55, 0.3);
}

.btn-primary:hover {
  background: var(--primary-gray-hover);
  border-color: var(--primary-gray-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(47, 49, 55, 0.35), inset 0 1px 0 rgba(255, 255, 255, 0.24);
}

.btn-secondary,
.melody-visibility-btn,
.metronome-play-btn,
.metronome-settings-btn {
  width: 100%;
  padding: 14px 28px;
  color: var(--neutral-black);
  background: #f2f2f7;
  border-color: var(--border-color);
  box-shadow: 0 2px 8px var(--card-shadow), inset 0 1px 0 rgba(255, 255, 255, 0.6);
}

.btn-secondary:hover,
.melody-visibility-btn:hover,
.metronome-play-btn:hover,
.metronome-settings-btn:hover {
  background: var(--neutral-light);
  border-color: var(--border-color-medium);
  color: var(--neutral-black);
  transform: translateY(-2px);
  box-shadow: 0 4px 16px var(--card-shadow-hover), inset 0 1px 0 rgba(255, 255, 255, 0.8);
}

[data-theme="dark"] .btn-secondary,
[data-theme="dark"] .melody-visibility-btn,
[data-theme="dark"] .metronome-play-btn,
[data-theme="dark"] .metronome-settings-btn {
  background: var(--neutral-light);
  border-color: var(--border-color);
  color: var(--neutral-black);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.28), inset 0 1px 0 rgba(255, 255, 255, 0.05);
}

[data-theme="dark"] .btn-secondary:hover,
[data-theme="dark"] .melody-visibility-btn:hover,
[data-theme="dark"] .metronome-play-btn:hover,
[data-theme="dark"] .metronome-settings-btn:hover {
  background: var(--neutral-medium);
  border-color: var(--border-color-medium);
  color: var(--neutral-black);
  box-shadow: 0 5px 18px rgba(0, 0, 0, 0.42), inset 0 1px 0 rgba(255, 255, 255, 0.08);
}

.melody-primary-row .btn-secondary,
.piano-secondary-row .btn-secondary,
.piano-secondary-row .control-toggle-btn {
  width: 100%;
  min-width: 0 !important;
  min-height: 52px;
  height: 52px;
  padding: 0 8px !important;
  flex: 0 0 auto !important;
  font-size: 1.1rem;
  font-weight: 500;
  letter-spacing: 0;
  line-height: 1;
}

.melody-primary-row .btn-secondary:hover,
.piano-secondary-row .btn-secondary:hover,
.piano-secondary-row .control-toggle-btn:hover {
  transform: translateY(-1px) scale(1.05);
  box-shadow: 0 4px 16px var(--card-shadow-hover);
}

.melody-primary-row .btn-secondary:active,
.piano-secondary-row .btn-secondary:active,
.piano-secondary-row .control-toggle-btn:active {
  transform: translateY(0) scale(0.98);
  box-shadow: 0 2px 8px var(--card-shadow);
}

.control-toggle-btn[aria-pressed="true"],
.btn-secondary.is-active,
.melody-visibility-btn.is-active,
.melody-visibility-btn.hidden-state,
.metronome-play-btn.is-active,
.metronome-play-btn.active {
  color: #fff;
  background: var(--primary-gray);
  border-color: var(--primary-gray);
}

[data-theme="dark"] .control-toggle-btn[aria-pressed="true"],
[data-theme="dark"] .btn-secondary.is-active,
[data-theme="dark"] .melody-visibility-btn.is-active,
[data-theme="dark"] .melody-visibility-btn.hidden-state,
[data-theme="dark"] .metronome-play-btn.is-active,
[data-theme="dark"] .metronome-play-btn.active {
  color: #fff;
  background: var(--primary-gray);
  border-color: var(--primary-gray);
  box-shadow: 0 5px 18px rgba(0, 0, 0, 0.46), inset 0 1px 0 rgba(255, 255, 255, 0.12);
}

.melody-visibility-btn.is-active:hover,
.melody-visibility-btn.hidden-state:hover,
.metronome-play-btn.is-active:hover,
.metronome-play-btn.active:hover {
  color: #fff;
  background: var(--primary-gray-hover);
  border-color: var(--primary-gray-hover);
}

.control-toggle-btn .control-toggle-btn-text {
  font-size: inherit;
  font-weight: inherit;
  letter-spacing: inherit;
  line-height: 1;
  font-family: inherit;
}

.melody-visibility-btn.control-toggle-btn[aria-pressed="true"] {
  background: var(--primary-gray) !important;
  color: #fff !important;
  border-color: var(--primary-gray) !important;
}

.melody-visibility-btn.control-toggle-btn[aria-pressed="true"]:hover {
  background: var(--primary-gray-hover) !important;
  border-color: var(--primary-gray-hover) !important;
}

.buttons {
  width: 100%;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 16px;
}

.toolbar-main-actions,
.toolbar-utility-group,
.button-group,
.toolbar-metronome-group {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.toolbar-main-actions > .btn-primary {
  width: auto;
}

.button-group .btn-secondary {
  width: auto;
}

.toolbar-main-actions .btn-secondary,
.buttons > .button-group > .btn-secondary {
  min-width: 96px;
  height: 52px;
  padding: 0 24px !important;
  font-size: 1.1rem;
  font-weight: 500;
  letter-spacing: 0;
  line-height: 1;
}

.toolbar-main-actions .btn-secondary:hover,
.buttons > .button-group > .btn-secondary:hover {
  transform: translateY(-1px) scale(1.05);
}

.toolbar-main-actions .btn-secondary:active,
.buttons > .button-group > .btn-secondary:active {
  transform: translateY(0) scale(0.98);
}

.toolbar-utility-group {
  justify-content: center;
}

.toolbar-metronome-group {
  gap: 8px;
  flex-wrap: nowrap;
}

.toolbar-utility-group > .melody-visibility-btn,
.toolbar-metronome-group > .metronome-play-btn {
  width: 44px;
  min-width: 44px;
  padding: 0;
}

.ui-icon {
  width: 22px;
  height: 22px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.ui-icon svg {
  width: 22px;
  height: 22px;
}

.theme-icon {
  width: 18px;
  height: 18px;
  color: currentColor;
}

.theme-icon svg {
  width: 100%;
  height: 100%;
}

.melody-secondary-card {
  min-height: 52px;
  padding: 10px 14px;
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--neutral-white);
  border: 1px solid var(--border-color);
  border-radius: 14px;
  box-shadow: 0 2px 8px var(--card-shadow), inset 0 1px 0 rgba(255, 255, 255, 0.6);
}

.melody-secondary-label {
  white-space: nowrap;
  color: var(--neutral-black);
  font-size: 15px;
  font-weight: 500;
  line-height: 1.2;
}

.melody-accidental-card {
  height: 53px;
  box-sizing: border-box;
  padding: 0 14px;
}

.melody-accidental-row,
.metronome-control,
.practice-counter-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
}

.melody-accidental-row input[type="range"] {
  flex: 1;
  accent-color: var(--primary-gray);
}

.bpm-input-control {
  width: 78px;
  min-height: 32px;
  border: 0;
  color: var(--neutral-black);
  background: transparent;
  text-align: center;
  font-size: 16px;
  outline: none;
}

.metronome-settings-btn {
  width: 36px;
  min-width: 36px;
  min-height: 34px;
  padding: 0;
  box-shadow: none;
}

.melody-metronome-card .metronome-control {
  width: 100%;
  display: grid;
  grid-template-columns: minmax(0, 2fr) minmax(0, 1fr);
  align-items: stretch;
  gap: 10px;
}

.melody-metronome-card .bpm-input-control {
  width: 100%;
  min-width: 0;
  min-height: 0;
  height: 38px;
  padding: 0 10px;
  border: 1px solid var(--border-color);
  border-radius: 10px;
  background: var(--neutral-white) !important;
  color: var(--neutral-black);
  text-align: center;
  font-size: 18px;
  font-weight: 600;
  line-height: 38px;
  box-sizing: border-box;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.02);
  transition: all 0.2s ease;
}

.melody-metronome-card .bpm-input-control:hover {
  border-color: var(--border-color-medium);
  box-shadow: 0 3px 12px rgba(0, 0, 0, 0.08);
  transform: translateY(-1px);
}

.melody-metronome-card .bpm-input-control:focus {
  border-color: var(--primary-gray);
  box-shadow: 0 0 0 3px var(--card-shadow-focus);
  transform: translateY(-1px);
}

.bpm-input-control.dragging,
#challengeBPM.dragging {
  background: var(--neutral-light) !important;
  border-color: var(--primary-gray) !important;
  box-shadow: 0 0 0 3px var(--card-shadow-focus);
  cursor: ns-resize !important;
  transform: translateY(-1px);
}

[data-theme="dark"] .bpm-input-control.dragging,
[data-theme="dark"] #challengeBPM.dragging {
  background: var(--neutral-medium) !important;
  border-color: var(--primary-gray) !important;
  box-shadow: 0 0 0 3px var(--card-shadow-focus);
  cursor: ns-resize !important;
  transform: translateY(-1px);
}

.melody-metronome-card .metronome-settings-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  min-width: 0;
  height: 38px;
  min-height: 38px;
  padding: 0;
  border-radius: 10px;
  background: var(--neutral-white);
  box-shadow: none;
}

.melody-metronome-card .metronome-settings-btn .ui-icon {
  width: 18px;
  height: 18px;
}

.toolbar-metronome-card {
  display: block;
  height: 54px;
  min-height: 54px;
  padding: 8px 12px;
  width: 164px;
  box-sizing: border-box;
}

.buttons .toolbar-metronome-card {
  flex: 0 0 auto;
}

.metronome-pattern-row {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: flex-end;
  margin-bottom: 16px;
}

.metronome-pattern-toggle-group {
  flex-direction: row;
  align-items: center;
  justify-content: flex-start;
  gap: 12px;
}

.metronome-pattern-toggle-group .toggle-container {
  width: auto;
  height: auto;
  display: inline-block;
  flex-shrink: 0;
}

.metronome-pattern-toggle-group .toggle-input {
  width: auto;
  height: auto;
  position: static;
  opacity: 1;
}

.metronome-pattern-toggle-group .toggle-slider,
.metronome-pattern-toggle-group .toggle-button {
  display: none;
}

.metronome-pattern-select {
  width: 100%;
  padding: 6px 10px;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  background: var(--neutral-white);
  color: var(--neutral-black);
  font-size: 14px;
  font-weight: 500;
}

.metronome-pattern-info {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 12px;
  background: var(--neutral-light);
  border-radius: 8px;
  color: var(--neutral-dark);
  font-size: 13px;
}

.metronome-pattern-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(32px, 1fr));
  gap: 8px;
  padding: 12px;
  margin-bottom: 8px;
  border: 1px solid var(--border-color);
  border-radius: 12px;
  background: var(--neutral-white);
}

.metronome-pattern-grid.disabled {
  opacity: 0.45;
  pointer-events: none;
}

.metronome-pattern-step {
  height: 34px;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  background: var(--neutral-light);
  color: var(--neutral-dark);
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
}

.metronome-pattern-step.beat-start {
  border-color: var(--primary-gray);
  color: var(--neutral-black);
}

.metronome-pattern-step.active {
  color: #fff;
  background: var(--primary-gray);
  border-color: var(--primary-gray);
  box-shadow: 0 3px 6px rgba(47, 49, 55, 0.3);
}

.metronome-pattern-step.active.beat-start {
  background: var(--primary-gray);
  border-color: var(--primary-gray);
  box-shadow: 0 3px 6px rgba(47, 49, 55, 0.3);
}

.metronome-pattern-step.bar-start {
  box-shadow: inset 0 0 0 2px rgba(47, 49, 55, 0.35);
}

.metronome-pattern-step.active.bar-start {
  box-shadow: inset 0 0 0 2px rgba(255, 255, 255, 0.35), 0 6px 16px rgba(47, 49, 55, 0.35);
}

[data-theme="dark"] .metronome-pattern-select,
[data-theme="dark"] .metronome-pattern-grid {
  background: var(--neutral-white) !important;
  border-color: var(--border-color) !important;
  color: var(--neutral-black) !important;
}

[data-theme="dark"] .metronome-pattern-info,
[data-theme="dark"] .metronome-pattern-step {
  background: var(--neutral-light) !important;
  border-color: var(--border-color) !important;
  color: var(--neutral-black) !important;
}

[data-theme="dark"] .metronome-pattern-step.active {
  color: #fff !important;
  background: var(--primary-gray) !important;
  border-color: var(--primary-gray) !important;
}

.practice-counter {
  display: flex;
  align-items: center;
  gap: 14px;
  min-height: 52px;
  padding: 8px 14px;
  border: 1px solid var(--border-color);
  border-radius: 12px;
  background: var(--neutral-white);
  color: var(--neutral-black);
  box-sizing: border-box;
  box-shadow: 0 2px 8px var(--card-shadow), inset 0 1px 0 rgba(255, 255, 255, 0.6);
}

.practice-counter label {
  color: var(--neutral-black);
  font-size: 15px;
  font-weight: 500;
  line-height: 1.2;
  white-space: nowrap;
}

.practice-counter-actions {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 10px;
  width: auto;
}

.practice-counter-actions .btn-secondary {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  min-width: 36px;
  height: 36px;
  min-height: 36px;
  padding: 0;
  border-radius: 8px;
  background: var(--neutral-white);
  border: 1px solid var(--border-color);
  box-shadow: 0 2px 8px var(--card-shadow);
  font-weight: 700;
  font-size: 18px;
  line-height: 1;
  transition: all 0.2s ease;
}

.practice-counter-actions .btn-secondary:hover {
  background: var(--neutral-light);
  transform: translateY(-1px) scale(1.05);
  box-shadow: 0 4px 16px var(--card-shadow-hover);
}

.practice-counter-actions span {
  min-width: 34px;
  color: var(--neutral-black);
  text-align: center;
  font-weight: 700;
  font-size: 18px;
  line-height: 1;
}

[data-theme="dark"] .melody-metronome-card .bpm-input-control,
[data-theme="dark"] .practice-counter-actions .btn-secondary {
  background: var(--neutral-light) !important;
  border-color: var(--border-color);
  color: var(--neutral-black);
  box-shadow: 0 2px 8px var(--card-shadow);
}

[data-theme="dark"] .melody-metronome-card .bpm-input-control:hover,
[data-theme="dark"] .practice-counter-actions .btn-secondary:hover {
  background: var(--neutral-medium) !important;
  box-shadow: 0 4px 16px var(--card-shadow-hover);
}

[data-theme="dark"] .practice-counter {
  background: var(--neutral-light);
  border-color: var(--border-color);
  box-shadow: 0 2px 8px var(--card-shadow);
}

[data-theme="dark"] .melody-secondary-card,
[data-theme="dark"] .practice-counter {
  background: var(--neutral-white);
  border-color: var(--border-color);
  color: var(--neutral-black);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.28), inset 0 1px 0 rgba(255, 255, 255, 0.04);
}

.score-container {
  min-height: 550px;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  position: relative;
  padding: 50px 40px;
  background: var(--neutral-white);
}

.score-container::before {
  content: "";
  position: absolute;
  top: 0;
  left: 50%;
  width: 60px;
  height: 4px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--primary-gray), var(--secondary-gray));
  opacity: 0.25;
  transform: translateX(-50%);
}

#score {
  width: 100%;
  max-width: 1200px;
  min-height: 430px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: visible;
  padding: 20px;
  background: #fff;
  border: 1px solid var(--border-color);
  border-radius: 14px;
  cursor: pointer;
  text-align: center;
}

[data-theme="dark"] #score {
  background: #fdfdfd;
}

#score .osmd-container,
#score [id^="osmdCanvasPage"] {
  flex: 0 0 auto;
  width: 100% !important;
  max-width: 100% !important;
  margin-left: auto !important;
  margin-right: auto !important;
}

#score .osmd-container {
  display: flex !important;
  flex-direction: column !important;
  align-items: center !important;
}

#score [id^="osmdCanvasPage"] {
  display: flex !important;
  justify-content: center !important;
  align-items: flex-start !important;
  width: fit-content !important;
}

#score svg {
  display: block !important;
  width: 100% !important;
  max-width: 100% !important;
  height: auto !important;
  margin: 0 auto !important;
}

#score.piano-score-content-hidden > * {
  opacity: 0 !important;
  filter: blur(10px);
  transition: opacity 0.2s ease, filter 0.2s ease;
}

#score::-webkit-scrollbar {
  display: none;
}

#score {
  scrollbar-width: none;
  -ms-overflow-style: none;
}

.empty-score-message {
  min-height: 360px;
  display: grid;
  place-items: center;
  color: var(--neutral-dark);
  text-align: center;
}

.challenge-cursor {
  position: absolute;
  top: 0;
  left: 0;
  width: 12px;
  height: 100%;
  background: rgba(47, 49, 55, 0.25);
  border: 1px solid rgba(47, 49, 55, 0.4);
  border-radius: 4px;
  pointer-events: none;
  display: none;
  opacity: 1;
  z-index: 8;
  box-shadow: 0 0 0 0 rgba(47, 49, 55, 0.35);
  transition: box-shadow 0.12s ease;
}

.challenge-cursor.is-running {
  display: block;
}

.challenge-cursor.is-selected {
  display: block;
}

.challenge-measure-mask {
  position: absolute;
  display: none;
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.94);
  pointer-events: none;
  z-index: 7;
  box-shadow: inset 0 0 0 1px rgba(0, 0, 0, 0.035);
}

.score-hidden .challenge-measure-mask.is-hidden {
  display: block;
}

.footer {
  padding: 8px 0 16px;
  text-align: center;
  color: var(--neutral-dark);
  font-size: 13px;
  border-top: 1px solid var(--border-color);
}

.footer a {
  color: var(--primary-gray);
  text-decoration: none;
}

[data-theme="dark"] .footer a {
  color: var(--neutral-black);
}

.modal {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 20px;
  background: rgba(0, 0, 0, 0.32);
}

.modal-content {
  width: min(720px, calc(100vw - 32px));
  max-height: min(760px, calc(100vh - 32px));
  overflow: hidden;
  display: flex;
  flex-direction: column;
  background: var(--neutral-white);
  border: 1px solid var(--border-color);
  border-radius: 18px;
  box-shadow: 0 22px 60px rgba(0, 0, 0, 0.22);
}

.modal-header {
  padding: 18px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-color);
}

.modal-header h3 {
  font-size: 20px;
  font-weight: 520;
}

.close-btn {
  width: 34px;
  height: 34px;
  border: 0;
  border-radius: 50%;
  background: var(--neutral-light);
  color: var(--neutral-black);
  font-size: 22px;
  cursor: pointer;
}

.modal-body {
  padding: 20px;
  overflow: auto;
}

.option-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

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

.option-card {
  min-height: 44px;
  padding: 10px 12px;
  display: flex;
  align-items: center;
  gap: 10px;
  border: 1px solid var(--border-color);
  border-radius: 12px;
  background: var(--neutral-white);
  cursor: pointer;
}

.option-card input {
  accent-color: var(--primary-gray);
}

.checkbox-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.checkbox-item {
  min-height: 44px;
  padding: 10px 12px;
  display: flex;
  align-items: center;
  gap: 10px;
  border: 1px solid var(--border-color);
  border-radius: 12px;
  background: var(--neutral-white);
  color: var(--neutral-black);
  cursor: pointer;
}

.checkbox-item input {
  accent-color: var(--primary-gray);
}

.btn-select-all {
  padding: 10px 18px !important;
  border: none !important;
  border-radius: 10px !important;
  background: #f2f2f7 !important;
  color: #1d1d1f !important;
  font-size: 0.95rem !important;
  font-weight: 600 !important;
  cursor: pointer;
  transition: all 0.3s ease !important;
}

.btn-select-all:hover {
  background: #e8e8ed !important;
  border-color: #b8b8bf !important;
  transform: translateY(-1px) !important;
}

[data-theme="dark"] .btn-select-all {
  background: var(--neutral-light) !important;
  color: var(--neutral-black) !important;
  border-color: var(--border-color) !important;
}

[data-theme="dark"] .btn-select-all:hover {
  background: var(--neutral-medium) !important;
}

.settings-section {
  margin-bottom: 18px;
}

.settings-section-title,
.section-title {
  margin-bottom: 10px;
  color: var(--heading-text);
  font-weight: 600;
}

.modal-buttons {
  padding-top: 18px;
  display: flex;
  justify-content: flex-end;
  gap: 10px;
}

.modal-buttons .btn-primary,
.modal-buttons .btn-secondary {
  width: auto;
}

.theme-options,
.language-options {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.theme-option,
.language-option {
  padding: 10px 12px;
  border: 1px solid var(--border-color);
  border-radius: 12px;
  background: var(--neutral-white);
  cursor: pointer;
}

.midi-settings-row,
.challenge-row {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}

.midi-select,
.modal select,
.modal input[type="number"] {
  min-height: 40px;
  padding: 8px 10px;
  border: 1px solid var(--border-color);
  border-radius: 10px;
  color: var(--neutral-black);
  background: var(--neutral-white);
}

.toggle-container {
  position: relative;
  display: inline-flex;
  width: 54px;
  height: 30px;
}

.toggle-input {
  opacity: 0;
  width: 0;
  height: 0;
}

.toggle-slider {
  position: absolute;
  inset: 0;
  border-radius: 999px;
  background: var(--neutral-medium);
  cursor: pointer;
  transition: background 180ms ease;
}

.toggle-button {
  position: absolute;
  width: 24px;
  height: 24px;
  left: 3px;
  top: 3px;
  border-radius: 50%;
  background: #fff;
  transition: transform 180ms ease;
}

.toggle-input:checked + .toggle-slider {
  background: var(--primary-gray);
}

.toggle-input:checked + .toggle-slider .toggle-button {
  transform: translateX(24px);
}

.modal-hint {
  margin-top: 10px;
  color: var(--secondary-text);
  font-size: 13px;
  line-height: 1.6;
}

.custom-measure-panel {
  display: none;
  margin-top: 14px;
  padding: 16px;
  border: 1px dashed var(--border-color);
  border-radius: 10px;
  background: var(--neutral-white);
}

.custom-measure-row {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  color: var(--neutral-black);
}

.custom-measure-row label,
.custom-measure-row span {
  color: var(--neutral-black);
  font-size: 0.95rem;
  font-weight: 500;
}

.custom-measure-row input[type="number"] {
  width: 96px;
}

.rhythm-section {
  margin-bottom: 24px;
}

.piano-section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

.piano-section-header h4,
.advanced-panel h4 {
  margin: 0;
  color: var(--neutral-black);
  font-size: 1.08rem;
  font-weight: 600;
  letter-spacing: 0;
}

.advanced-panel {
  margin-top: 20px;
  padding: 20px;
  background: var(--info-bg);
  border: 2px solid var(--info-border);
  border-radius: 12px;
}

.advanced-panel p {
  margin: 8px 0 18px;
  color: var(--secondary-text);
  font-size: 0.9rem;
  line-height: 1.5;
}

.frequency-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 15px;
  margin-bottom: 18px;
}

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

.frequency-item {
  display: grid;
  gap: 6px;
}

.frequency-item label {
  color: var(--neutral-black);
  font-size: 0.9rem;
  font-weight: 500;
}

.frequency-item div {
  display: flex;
  align-items: center;
  gap: 10px;
}

.frequency-item input[type="range"] {
  flex: 1;
  accent-color: var(--primary-gray);
}

.frequency-item span {
  min-width: 42px;
  color: var(--primary-gray);
  text-align: right;
  font-size: 0.9rem;
  font-weight: 700;
}

@media (max-width: 860px) {
  body {
    padding: 12px;
  }

  .header {
    padding: 28px 18px;
  }

  .header-content {
    flex-direction: column;
  }

  .header h1 {
    font-size: 2.4rem;
  }

  .controls,
  .score-container {
    padding: 18px 14px;
  }

  .option-grid,
  .option-grid.keys,
  .checkbox-grid {
    grid-template-columns: 1fr;
  }

  .rhythm-frequency-grid {
    grid-template-columns: 1fr;
  }

  .toolbar-main-actions,
  .toolbar-utility-group,
  .button-group,
  .toolbar-metronome-group {
    width: 100%;
    justify-content: center;
  }

  .button-group .btn-secondary,
  .toolbar-main-actions > .btn-primary {
    flex: 1 1 110px;
  }

  #score {
    max-width: 100%;
    min-height: 360px;
    padding: 12px;
  }

  #score.score-compact svg {
    max-width: 100% !important;
  }
}

/* Alignment overrides: keep the piano tool visually locked to the existing tools. */
.piano-primary-row,
.piano-secondary-row {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.modal {
  position: fixed !important;
  inset: 0 !important;
  width: 100% !important;
  height: 100% !important;
  display: none;
  align-items: center !important;
  justify-content: center !important;
  padding: 20px;
  background: rgba(0, 0, 0, 0.5) !important;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  opacity: 0;
  z-index: 9999 !important;
  pointer-events: auto !important;
  transition: opacity 0.3s ease;
}

.modal[style*="display: flex"],
.modal[style*="display:flex"],
.modal[style*="display: block"],
.modal[style*="display:block"],
.modal.show {
  display: flex !important;
  opacity: 1 !important;
}

.modal-content {
  width: 90% !important;
  max-width: 600px !important;
  max-height: 90vh !important;
  overflow: hidden !important;
  display: flex;
  flex-direction: column;
  background: #ffffff !important;
  border: none !important;
  border-radius: 28px !important;
  box-shadow: 0 24px 72px rgba(15, 23, 42, 0.18), 0 8px 24px rgba(47, 49, 55, 0.08) !important;
  position: relative !important;
  z-index: 10000 !important;
  pointer-events: auto !important;
}

.modal-header {
  padding: 30px 32px 24px !important;
  display: flex !important;
  align-items: center !important;
  justify-content: space-between !important;
  background: #ffffff !important;
  border-top: 14px solid rgba(47, 49, 55, 0.32) !important;
  border-bottom: 1px solid rgba(0, 0, 0, 0.06) !important;
  position: relative !important;
  z-index: 10001 !important;
}

.modal-header::before {
  content: "";
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 40px;
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--primary-gray), var(--secondary-gray));
  opacity: 0.3;
  transform: translateX(-50%);
}

.modal-header h3 {
  margin: 0;
  color: #1d1d1f;
  font-size: 1.7rem;
  font-weight: 600;
  letter-spacing: -0.043em;
}

.close-btn {
  width: 32px !important;
  height: 32px !important;
  padding: 0 !important;
  display: flex !important;
  align-items: center !important;
  justify-content: center !important;
  border: none !important;
  border-radius: 8px !important;
  background: var(--neutral-soft) !important;
  color: var(--neutral-text-light) !important;
  font-size: 1.2rem !important;
  line-height: 1 !important;
  cursor: pointer !important;
  transition: all 0.3s ease !important;
  position: relative !important;
  z-index: 10002 !important;
}

.close-btn:hover {
  background: var(--neutral-soft) !important;
  color: var(--neutral-text) !important;
  transform: scale(1.1) !important;
}

.modal-body {
  padding: 28px 32px 32px !important;
  max-height: calc(90vh - 120px) !important;
  overflow-y: auto !important;
  position: relative !important;
  z-index: 10001 !important;
  pointer-events: auto !important;
}

#measureModal .modal-body {
  padding: 28px 32px 32px !important;
}

#challengeModal .control-row {
  background: transparent;
  margin-top: 0;
  margin-bottom: 32px;
}

#challengeModal .control-group label {
  color: #1d1d1f;
  font-size: 1rem;
  font-weight: 400;
  letter-spacing: 0.01em;
}

#challengeModal .control-group input[type="number"] {
  width: 100%;
}

#challengeModal .modal-content {
  width: 90%;
  max-width: 600px;
}

#challengeModal .modal-hint {
  margin: 0;
  color: var(--secondary-text);
  font-size: 0.9rem;
  line-height: 1.4;
}

#challengeModal .toggle-container {
  display: inline-block;
  width: 60px;
  height: 34px;
}

#challengeModal .toggle-slider {
  border-radius: 34px;
  background: #ccc;
  box-shadow: none;
}

#challengeModal .toggle-button {
  width: 26px;
  height: 26px;
  left: 4px;
  top: auto;
  bottom: 4px;
}

#challengeModal .toggle-input:checked + .toggle-slider {
  background: var(--primary-gray);
}

#challengeModal .toggle-input:checked + .toggle-slider .toggle-button {
  transform: translateX(26px);
}

.option-grid,
.option-grid.keys,
.checkbox-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 12px;
}

.option-card,
.checkbox-item {
  min-height: 52px;
  padding: 14px 18px;
  display: flex;
  align-items: center;
  gap: 14px;
  border: 1px solid transparent;
  border-radius: 10px;
  background: #fff;
  color: var(--neutral-black);
  cursor: pointer;
  transition: all 0.3s ease;
}

.option-card:hover,
.checkbox-item:hover {
  background: #f2f2f7;
  border-color: var(--neutral-medium);
  transform: translateY(-1px);
}

.option-card input[type="checkbox"],
.checkbox-item input[type="checkbox"] {
  appearance: none;
  -webkit-appearance: none;
  width: 24px !important;
  height: 24px !important;
  min-width: 24px;
  min-height: 24px;
  margin: 0;
  display: inline-grid;
  place-content: center;
  border: 1.5px solid #c7c7cc;
  border-radius: 50% !important;
  background: #fff !important;
  cursor: pointer;
  transition: border-color 0.18s ease, box-shadow 0.18s ease, background-color 0.18s ease;
  box-shadow: none !important;
  transform: none !important;
}

.option-card input[type="checkbox"]::before,
.checkbox-item input[type="checkbox"]::before {
  content: "";
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--primary-gray);
  transform: scale(0);
  transition: transform 0.18s ease;
}

.option-card input[type="checkbox"]:checked,
.checkbox-item input[type="checkbox"]:checked {
  border-color: var(--primary-gray);
}

.option-card input[type="checkbox"]:checked::before,
.checkbox-item input[type="checkbox"]:checked::before {
  transform: scale(1);
}

.option-card input[type="checkbox"]:hover,
.option-card input[type="checkbox"]:focus-visible,
.checkbox-item input[type="checkbox"]:hover,
.checkbox-item input[type="checkbox"]:focus-visible {
  border-color: var(--primary-gray);
  box-shadow: 0 0 0 3px var(--piano-accent-focus) !important;
  outline: none;
  transform: none !important;
}

.checkbox-item {
  min-height: auto;
  padding: 14px 18px;
  display: flex;
  align-items: center;
  gap: 14px;
  border: none;
  border-radius: 10px;
  background: #fff;
  cursor: pointer;
  transition: all 0.3s ease;
}

.checkbox-item:hover {
  background: #f2f2f7;
  transform: translateY(-1px);
}

.checkbox-item input[type="checkbox"] {
  flex: 0 0 24px;
  padding: 0 !important;
}

.checkbox-item input[type="checkbox"]:hover,
.checkbox-item input[type="checkbox"]:focus,
.checkbox-item input[type="checkbox"]:focus-visible {
  border-color: var(--primary-gray);
  background: #fff !important;
  box-shadow: 0 0 0 3px var(--piano-accent-focus) !important;
}

.checkbox-item input[type="checkbox"]:checked {
  background: #fff !important;
}

.checkbox-item:focus-within {
  outline: 2px solid var(--primary-gray);
  outline-offset: 2px;
}

.modal-buttons {
  display: flex !important;
  gap: 12px !important;
  justify-content: flex-end !important;
  margin-top: 32px !important;
  padding-top: 24px !important;
  border-top: 1px solid var(--border-color) !important;
  position: relative !important;
  z-index: 10002 !important;
  pointer-events: auto !important;
}

.modal-buttons .btn-primary,
.modal-buttons .btn-secondary {
  width: auto !important;
  min-height: 44px;
  padding: 12px 22px !important;
}

.modal-buttons .btn-primary {
  background: var(--primary-gray) !important;
  border-color: var(--primary-gray) !important;
  color: #fff !important;
  box-shadow: 0 3px 6px rgba(47, 49, 55, 0.3) !important;
}

.modal-buttons .btn-primary:hover {
  background: var(--primary-gray-hover) !important;
  border-color: var(--primary-gray-hover) !important;
  box-shadow: 0 8px 24px rgba(47, 49, 55, 0.35), inset 0 1px 0 rgba(255, 255, 255, 0.3) !important;
}

.modal-buttons .btn-secondary {
  background: #f2f2f7 !important;
  border-color: #d2d2d7 !important;
  color: #1d1d1f !important;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04), inset 0 1px 0 rgba(255, 255, 255, 0.6) !important;
}

.modal-buttons .btn-secondary:hover {
  background: #e5e5ea !important;
  border-color: #c7c7cc !important;
  transform: translateY(-1px);
}

.theme-options,
.language-options {
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  padding: 4px 12px 0;
}

.theme-option,
.language-option {
  padding: 12px 14px;
  display: flex;
  align-items: center;
  gap: 10px;
  border: 0;
  border-radius: 12px;
  background: var(--neutral-white);
  color: var(--neutral-black);
  font-size: 14px;
  cursor: pointer;
  transition: all 0.15s ease;
}

.theme-option:hover,
.language-option:hover {
  background: var(--primary-gray);
  color: #fff;
}

.settings-menu {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  min-width: 220px;
  z-index: 9999;
  display: block;
  overflow: visible;
  border: 1px solid var(--border-color);
  border-radius: 16px;
  background: var(--neutral-white);
  box-shadow: 0 12px 48px var(--card-shadow-hover);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: all 0.25s ease;
}

.settings-menu.show {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

#settingsModal .settings-menu {
  position: static !important;
  min-width: 0 !important;
  background: transparent !important;
  border: 0 !important;
  box-shadow: none !important;
}

#settingsModal .settings-section {
  padding: 22px 20px;
  margin-bottom: 16px;
  border: 1px solid var(--border-color);
  border-radius: 20px;
  background: var(--neutral-light);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.78),
    0 10px 24px rgba(15, 23, 42, 0.04);
}

#settingsModal .settings-section:not(:last-child) {
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 16px;
}

#settingsModal .settings-section-title {
  margin: 0 0 18px;
  padding: 0;
  background: transparent;
  box-shadow: none;
  border-radius: 0;
  color: var(--neutral-dark);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

#settingsModal .theme-options,
#settingsModal .language-options {
  display: grid;
  gap: 8px;
  padding: 0;
}

#settingsModal .theme-option,
#settingsModal .language-option,
#settingsModal .midi-settings-row {
  margin: 0;
  border: 1px solid var(--border-color);
  border-radius: 14px;
  background: var(--neutral-white);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.85);
}

#settingsModal .theme-option,
#settingsModal .language-option {
  padding: 13px 14px;
}

#settingsModal .theme-option:hover,
#settingsModal .language-option:hover {
  background: rgba(47, 49, 55, 0.08);
  border-color: rgba(47, 49, 55, 0.24);
  color: var(--neutral-black);
  transform: translateY(-1px);
}

#settingsModal .theme-option:active,
#settingsModal .language-option:active {
  background: rgba(47, 49, 55, 0.14);
  border-color: rgba(47, 49, 55, 0.3);
  color: var(--neutral-black);
  transform: translateY(0);
}

#settingsModal .midi-settings-row {
  --toggle-active: var(--primary-gray);
  --toggle-glow: rgba(47, 49, 55, 0.35);
  padding: 15px 16px;
}

@supports (color: color-mix(in srgb, red, transparent)) {
  #settingsModal .midi-settings-row {
    --toggle-glow: color-mix(in srgb, var(--primary-gray) 35%, transparent);
  }
}

#settingsModal .midi-settings-row .toggle-input:checked + .toggle-slider {
  background: var(--primary-gray) !important;
}

#settingsModal .midi-settings-row .toggle-input:checked + .toggle-slider .toggle-button {
  box-shadow: 0 4px 10px var(--toggle-glow);
}

#settingsModal .settings-section .midi-settings-row {
  margin-left: 0;
  margin-right: 0;
}

#settingsModal .settings-section .midi-settings-row + .midi-settings-row {
  margin-top: 12px;
}

.parameter-exchange-actions {
  display: flex;
  gap: 8px;
  width: 100%;
}

.parameter-exchange-actions .btn-secondary {
  flex: 1;
  min-height: 42px;
  white-space: nowrap;
}

@media (max-width: 520px) {
  .parameter-exchange-actions {
    flex-direction: column;
  }
}

#settingsModal .midi-settings-row label {
  margin-bottom: 8px;
}

#settingsModal .midi-settings-row > div {
  gap: 14px !important;
}

#settingsModal .midi-select {
  min-height: 44px;
  padding: 10px 12px;
}

#settingsModal #metronomeVolumeSlider {
  -webkit-appearance: none;
  appearance: none;
  height: 4px;
  padding: 0;
  background: #d2d2d7;
  border: none;
  border-radius: 2px;
  accent-color: var(--primary-gray);
  transition: all 0.3s ease;
  box-shadow: inset 0 0 0 0.5px rgba(0, 0, 0, 0.45);
}

#settingsModal #metronomeVolumeSlider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 20px;
  height: 20px;
  background: #ffffff;
  border: 4px solid var(--primary-gray);
  border-radius: 50%;
  cursor: pointer;
  box-shadow:
    0 2px 8px rgba(0, 0, 0, 0.08),
    0 4px 16px rgba(47, 49, 55, 0.12);
  transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

#settingsModal #metronomeVolumeSlider::-webkit-slider-thumb:hover {
  border-color: var(--primary-gray-hover);
  box-shadow: 0 4px 16px rgba(47, 49, 55, 0.3);
  transform: scale(1.1);
}

#settingsModal #metronomeVolumeSlider::-webkit-slider-thumb:active {
  transform: scale(0.95);
}

#settingsModal #metronomeVolumeSlider::-moz-range-thumb {
  width: 20px;
  height: 20px;
  background: #ffffff;
  border: 2px solid var(--primary-gray);
  border-radius: 50%;
  cursor: pointer;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.12);
  transition: all 0.15s cubic-bezier(0.4, 0, 0.2, 1);
}

#settingsModal #metronomeVolumeSlider::-moz-range-track {
  height: 4px;
  background: #d2d2d7;
  border: none;
  border-radius: 2px;
}

.settings-section {
  margin-bottom: 24px;
}

.settings-section-title,
.section-title {
  margin-bottom: 12px;
  color: var(--neutral-black);
  font-size: 0.95rem;
  font-weight: 600;
}

.rhythm-section {
  margin-bottom: 32px;
}

.rhythm-section h4,
.piano-section-header h4,
.advanced-panel h4 {
  color: #1d1d1f;
  font-size: 1.3rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.checkbox-item span {
  color: var(--neutral-text-secondary);
  font-size: 1rem;
  font-weight: 500;
  letter-spacing: -0.01em;
}

.advanced-panel {
  margin-top: 24px;
  padding: 24px;
  background: var(--neutral-soft);
  border: 1px solid var(--piano-accent-border);
  border-radius: 12px;
}

.advanced-panel p {
  color: var(--secondary-text);
  font-size: 0.9rem;
  line-height: 1.5;
}

.frequency-item label {
  color: #495057;
}

.frequency-item span {
  color: var(--primary-gray);
}

.custom-measure-panel {
  background: var(--neutral-soft);
  border-color: var(--piano-accent-border);
}

.custom-measure-panel .modal-hint {
  margin: 8px 0 0;
}

#measureCustomPanel.custom-measure-panel {
  margin-top: 12px;
  padding: 0;
  border: 0;
  background: transparent;
}

.modal *,
.modal-content *,
.modal-body *,
.modal-header *,
.modal-buttons * {
  pointer-events: auto !important;
  position: relative !important;
}

.modal .toggle-slider,
.modal .toggle-button {
  position: absolute !important;
}

[data-theme="dark"] .modal-content,
[data-theme="dark"] .modal-header,
[data-theme="dark"] .modal-body {
  background: var(--neutral-white) !important;
  color: var(--neutral-black) !important;
}

[data-theme="dark"] .modal-header {
  border-top-color: rgba(255, 255, 255, 0.14) !important;
  border-bottom-color: var(--border-color) !important;
}

[data-theme="dark"] .modal-header h3,
[data-theme="dark"] .rhythm-section h4,
[data-theme="dark"] .piano-section-header h4,
[data-theme="dark"] .advanced-panel h4,
[data-theme="dark"] #challengeModal .control-group label,
[data-theme="dark"] .settings-section-title,
[data-theme="dark"] .section-title,
[data-theme="dark"] .frequency-item label,
[data-theme="dark"] .custom-measure-row label,
[data-theme="dark"] .custom-measure-row span {
  color: var(--neutral-black) !important;
}

[data-theme="dark"] .close-btn {
  background: var(--neutral-light) !important;
  color: var(--neutral-text-light) !important;
}

[data-theme="dark"] .close-btn:hover {
  background: var(--neutral-medium) !important;
  color: var(--neutral-black) !important;
}

[data-theme="dark"] .modal-hint,
[data-theme="dark"] .advanced-panel p {
  color: var(--secondary-text) !important;
}

[data-theme="dark"] .frequency-item span {
  color: var(--neutral-black) !important;
}

[data-theme="dark"] .advanced-panel,
[data-theme="dark"] .custom-measure-panel {
  background: var(--neutral-soft) !important;
  border-color: var(--piano-accent-border) !important;
}

[data-theme="dark"] .modal select,
[data-theme="dark"] .modal input[type="number"],
[data-theme="dark"] .midi-select {
  background: var(--neutral-light) !important;
  border-color: var(--border-color) !important;
  color: var(--neutral-black) !important;
}

[data-theme="dark"] .modal-buttons .btn-secondary,
[data-theme="dark"] .parameter-exchange-actions .btn-secondary {
  background: var(--neutral-light) !important;
  border-color: var(--border-color) !important;
  color: var(--neutral-black) !important;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.28) !important;
}

[data-theme="dark"] .modal-buttons .btn-secondary:hover,
[data-theme="dark"] .parameter-exchange-actions .btn-secondary:hover {
  background: var(--neutral-medium) !important;
  border-color: var(--border-color-medium) !important;
  color: var(--neutral-black) !important;
}

[data-theme="dark"] .settings-btn {
  background: var(--neutral-light) !important;
  border-color: var(--border-color) !important;
  color: var(--neutral-black) !important;
}

[data-theme="dark"] .settings-btn:hover,
[data-theme="dark"] .settings-btn:active,
[data-theme="dark"] .settings-btn.is-open {
  background: var(--neutral-medium) !important;
  border-color: var(--border-color-medium) !important;
}

[data-theme="dark"] .settings-menu {
  background: var(--neutral-white) !important;
  border-color: var(--border-color) !important;
  box-shadow: 0 16px 64px rgba(0, 0, 0, 0.8) !important;
}

[data-theme="dark"] #settingsModal .settings-section {
  background: rgba(255, 255, 255, 0.03) !important;
  border-color: rgba(255, 255, 255, 0.08) !important;
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.05),
    0 12px 28px rgba(0, 0, 0, 0.28) !important;
}

[data-theme="dark"] #settingsModal .settings-section-title {
  background: transparent !important;
  color: rgba(255, 255, 255, 0.72) !important;
}

[data-theme="dark"] #settingsModal .theme-option,
[data-theme="dark"] #settingsModal .language-option,
[data-theme="dark"] #settingsModal .midi-settings-row {
  --toggle-active: var(--primary-gray);
  --toggle-glow: rgba(242, 242, 247, 0.22);
  background: rgba(255, 255, 255, 0.04) !important;
  border-color: rgba(255, 255, 255, 0.08) !important;
  color: var(--neutral-black) !important;
  box-shadow: none !important;
}

@supports (color: color-mix(in srgb, red, transparent)) {
  [data-theme="dark"] #settingsModal .midi-settings-row {
    --toggle-glow: color-mix(in srgb, var(--primary-gray) 38%, transparent);
  }
}

[data-theme="dark"] #settingsModal .theme-option:hover,
[data-theme="dark"] #settingsModal .language-option:hover {
  background: var(--neutral-medium) !important;
  border-color: var(--border-color-medium) !important;
  color: var(--neutral-black) !important;
}

[data-theme="dark"] #settingsModal .theme-option:active,
[data-theme="dark"] #settingsModal .language-option:active {
  background: var(--primary-gray) !important;
  border-color: var(--primary-gray) !important;
  color: var(--neutral-black) !important;
}

[data-theme="dark"] #settingsModal #metronomeVolumeSlider {
  background: var(--neutral-medium);
  box-shadow: inset 0 0 0 0.5px rgba(255, 255, 255, 0.18);
}

[data-theme="dark"] #settingsModal #metronomeVolumeSlider::-webkit-slider-thumb {
  background: #ffffff;
  border-color: var(--primary-gray);
}

[data-theme="dark"] .option-card,
[data-theme="dark"] .checkbox-item,
[data-theme="dark"] .custom-measure-panel {
  background: var(--neutral-light);
  border-color: var(--border-color);
}

[data-theme="dark"] .option-card:hover,
[data-theme="dark"] .checkbox-item:hover {
  background: var(--neutral-medium);
}

[data-theme="dark"] .option-card:has(input:checked),
[data-theme="dark"] .checkbox-item:has(input:checked) {
  background: var(--neutral-medium);
  border-color: var(--border-color-medium);
}

[data-theme="dark"] .option-card input[type="checkbox"],
[data-theme="dark"] .checkbox-item input[type="checkbox"] {
  background: var(--neutral-white) !important;
  border-color: var(--neutral-dark);
}

[data-theme="dark"] .option-card input[type="checkbox"]::before,
[data-theme="dark"] .checkbox-item input[type="checkbox"]::before {
  background: var(--neutral-black);
}

[data-theme="dark"] .checkbox-item span {
  color: var(--neutral-black) !important;
}

[data-theme="dark"] .checkbox-item input[type="checkbox"]:checked {
  border-color: var(--neutral-black);
  background: var(--neutral-white) !important;
}

[data-theme="dark"] .checkbox-item input[type="checkbox"]:hover,
[data-theme="dark"] .checkbox-item input[type="checkbox"]:focus,
[data-theme="dark"] .checkbox-item input[type="checkbox"]:focus-visible {
  background: var(--neutral-white) !important;
}

@media (max-width: 768px) {
  .header {
    padding: 24px 16px 22px;
  }

  .header-content {
    flex-direction: column;
    gap: 16px;
    align-items: center;
    position: static;
  }

  .header-text {
    order: 2;
    width: 100%;
    text-align: center;
  }

  .header-text p[data-i18n="app.subtitle"] {
    display: none;
  }

  .header h1 {
    margin-bottom: 0;
    font-size: 2.1rem;
    line-height: 1.12;
  }

  .header-controls {
    position: static;
    transform: none;
    order: 1;
    width: min(100%, 360px);
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    justify-content: stretch;
    gap: 12px;
  }

  .function-selector,
  .settings-dropdown {
    width: 100%;
    min-width: 0;
    align-items: stretch;
  }

  .settings-dropdown.ic-account-mount--cognote-tool {
    display: grid !important;
    flex-direction: initial !important;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: stretch !important;
    gap: 8px !important;
  }

  .function-btn,
  .settings-btn,
  .settings-dropdown .ic-account-inline {
    width: 100%;
    min-width: 0;
    padding: 12px 14px;
    text-align: center;
  }

  .settings-dropdown .ic-account-inline {
    height: 42px !important;
    min-height: 42px !important;
    margin: 0 !important;
    padding: 0 !important;
    align-items: stretch !important;
  }

  .settings-dropdown .ic-account-inline > button {
    width: 100% !important;
    height: 42px !important;
    min-height: 42px !important;
    padding: 0 10px !important;
    justify-content: center !important;
  }

  .function-menu {
    width: 100%;
    min-width: 100%;
  }

  .piano-primary-row,
  .piano-secondary-row {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
  }

  .melody-primary-row .btn-secondary,
  .piano-secondary-row .btn-secondary,
  .piano-secondary-row .control-toggle-btn {
    min-height: 48px;
    height: 48px;
    padding: 0 10px !important;
    font-size: 0.98rem;
    white-space: normal;
    line-height: 1.15;
  }

  .score-container {
    padding: 12px 8px 14px;
  }

  #score {
    width: 100%;
    max-width: 100%;
    min-height: 340px;
    padding: 8px;
    border-radius: 12px;
    overflow: visible;
  }

  #score .osmd-container,
  #score [id^="osmdCanvasPage"] {
    min-width: 0 !important;
  }
}

@media (max-width: 599px) {
  .controls {
    padding: 12px !important;
  }

  .controls > .control-row {
    gap: 12px !important;
    margin-bottom: 12px !important;
  }

  .control-row.piano-primary-row,
  .control-row.piano-secondary-row {
    display: grid !important;
    grid-template-columns: 1fr !important;
    gap: 12px !important;
  }

  .control-row.piano-primary-row > .control-group,
  .control-row.piano-secondary-row > .melody-secondary-cell {
    width: 100% !important;
    min-width: 0 !important;
  }

  .piano-primary-row .btn-secondary,
  .piano-secondary-row .btn-secondary,
  .piano-secondary-row .control-toggle-btn {
    width: 100% !important;
    min-width: 0 !important;
    min-height: 52px;
    height: 52px;
    padding: 0 8px !important;
    font-size: 1rem;
    line-height: 1;
    white-space: nowrap;
  }
}

@media (max-width: 520px) {
  .header {
    padding: 24px 12px 22px;
  }

  .header-content {
    gap: 20px;
  }

  .header h1 {
    font-size: 1.9rem;
    line-height: 1.05;
  }

  .header-controls {
    width: 100%;
    display: flex;
    grid-template-columns: none;
    justify-content: flex-start;
    align-items: center;
    gap: 20px;
    flex-wrap: nowrap;
    padding: 0;
  }

  .function-selector,
  .settings-dropdown {
    width: auto;
    align-items: center;
  }

  .settings-dropdown.ic-account-mount--cognote-tool {
    display: flex !important;
    flex-direction: row !important;
    grid-template-columns: none !important;
    align-items: center !important;
    gap: 8px !important;
  }

  .function-btn {
    width: auto;
    min-width: 80px;
    padding: 10px 16px;
    font-size: 15px;
  }

  .settings-btn {
    width: auto;
    min-width: 128px;
    padding: 10px 16px;
    font-size: 15px;
  }

  .settings-dropdown .ic-account-inline {
    width: auto !important;
    min-width: 100px !important;
    height: auto !important;
    min-height: 0 !important;
    margin: 0 !important;
    padding: 0 !important;
    align-items: center !important;
    flex: 0 0 auto !important;
  }

  .settings-dropdown .ic-account-inline > button {
    width: 100px !important;
    height: 42px !important;
    min-height: 42px !important;
    padding: 0 14px !important;
    justify-content: center !important;
  }

  .piano-primary-row,
  .piano-secondary-row {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .option-grid,
  .option-grid.keys {
    grid-template-columns: 1fr;
  }

  .controls {
    padding: 12px !important;
  }

  .control-row {
    margin-bottom: 12px;
  }

  .buttons {
    gap: 12px;
  }

  .toolbar-main-actions {
    gap: 10px;
  }

  .toolbar-main-actions > .btn-primary,
  .button-group .btn-secondary {
    min-height: 46px;
    padding: 0 12px !important;
    font-size: 0.95rem;
  }

  .toolbar-utility-group {
    gap: 10px;
  }

  .toolbar-utility-group > .melody-visibility-btn,
  .toolbar-metronome-group > .metronome-play-btn {
    width: 46px;
    min-width: 46px;
    height: 46px;
    min-height: 46px;
    padding: 0 !important;
    flex: 0 0 46px;
  }

  .score-container {
    padding: 8px 0 12px;
  }

  #score {
    min-height: 300px;
    padding: 6px;
    border-radius: 10px;
  }

  #score svg {
    min-width: 0;
  }

  #score.score-compact svg {
    min-width: 0;
  }

  .modal-content {
    width: calc(100vw - 24px) !important;
  }

  .modal-header,
  .modal-body {
    padding-left: 20px !important;
    padding-right: 20px !important;
  }
}

@media (max-width: 360px) {
  .piano-primary-row,
  .piano-secondary-row {
    grid-template-columns: 1fr;
  }

  #score svg {
    min-width: 0;
  }

  #score.score-compact svg {
    min-width: 0;
  }
}

@media (max-width: 599px), (orientation: landscape) and (max-height: 599px) {
  .controls .toolbar-main-actions {
    width: 100%;
    align-items: stretch;
  }

  .controls .toolbar-main-actions > .btn-primary {
    flex: 0 0 100% !important;
    width: 100% !important;
    max-width: 100% !important;
    min-width: 0 !important;
    box-sizing: border-box;
  }

  .controls .toolbar-utility-group {
    display: flex !important;
    flex-direction: row !important;
    flex-wrap: wrap !important;
    align-items: center !important;
    justify-content: center !important;
    width: 100% !important;
    gap: 10px !important;
  }

  .controls .toolbar-metronome-group {
    display: flex !important;
    flex: 0 1 auto !important;
    flex-wrap: nowrap !important;
    width: auto !important;
    min-width: 0 !important;
    max-width: calc(100% - 60px) !important;
  }

  .controls .toolbar-utility-group > .melody-visibility-btn,
  .controls .toolbar-metronome-group > .metronome-play-btn {
    flex: 0 0 50px !important;
  }

  .controls .toolbar-utility-group > .melody-visibility-btn,
  .controls .toolbar-metronome-group {
    order: 1;
  }

  .controls .practice-counter {
    order: 2;
    flex: 0 0 100% !important;
    width: 100% !important;
    justify-content: center !important;
  }
}