.exercise-studio {
  max-width: 1520px;
  padding: 30px clamp(18px, 4vw, 60px) 58px;
  background: var(--ui-filter-bg, #edf3f6);
  color: var(--ui-text, #173044);
  font-family: var(--type-font-ui, var(--sans, system-ui, sans-serif));
}

.exercise-studio .admin-title {
  margin-bottom: var(--ui-section-gap, 18px);
  padding: 25px 30px;
  background: var(--ui-text, #172f42);
  color: var(--ui-inverse-text, #fff);
}

.exercise-studio .admin-title p {
  color: color-mix(in srgb, var(--ui-inverse-text, #fff) 72%, var(--ui-accent, #1676a8));
}

.exercise-studio .quiet-button {
  border-color: color-mix(in srgb, var(--ui-inverse-text, #fff) 55%, var(--ui-accent, #1676a8));
}

.exercise-studio .quiet-button:hover,
.exercise-studio .quiet-button:focus-visible {
  background: var(--ui-surface, #fffdf7);
  color: var(--ui-text, #172f42);
}

.exercise-studio .exercise-shell {
  display: grid;
  grid-template-columns: 270px minmax(0, 1fr);
  gap: var(--ui-section-gap, 18px);
}

.exercise-studio .exercise-nav {
  align-self: start;
  max-height: calc(100vh - 150px);
  overflow: auto;
  padding: var(--ui-card-padding, 14px);
  background: var(--ui-text, #172f42);
}

.exercise-studio .exercise-nav h2 {
  margin: 5px 8px 14px;
  color: var(--ui-inverse-text, #fff);
  font: 700 23px var(--serif);
}

.exercise-studio .exercise-nav a {
  display: block;
  padding: 10px 11px;
  border-top: 1px solid color-mix(in srgb, var(--ui-inverse-text, #fff) 12%, transparent);
  color: var(--site-header-link, #d6e3e9);
  font-size: var(--type-helper-font-size, 12px);
}

.exercise-studio .exercise-nav a:hover,
.exercise-studio .exercise-nav a.active {
  background: color-mix(in srgb, var(--ui-accent, #1676a8) 28%, var(--ui-text, #172f42));
  color: var(--ui-inverse-text, #fff);
}

.exercise-studio .exercise-nav small {
  display: block;
  margin-top: 4px;
  color: var(--site-header-muted, #b9d3df);
  font-size: var(--type-badge-size, 10px);
}

.exercise-studio .exercise-board {
  min-width: 0;
  border: 1px solid var(--ui-border-color, #bfd0da);
  border-radius: var(--ui-panel-radius, 6px);
  background: var(--ui-surface, #fffdf7);
  box-shadow: var(--ui-shadow-card, 0 8px 22px rgba(23, 47, 66, .08));
}

.exercise-studio .exercise-board-head {
  padding: 20px 25px;
  border-bottom: 1px solid var(--ui-border-color, #bfd0da);
  background: var(--ui-editor-toolbar-bg, var(--ui-filter-bg, #f5fafb));
}

.exercise-studio .question-board-title {
  display: flex;
  gap: var(--ui-section-gap, 18px);
  align-items: flex-end;
  justify-content: space-between;
}

.exercise-studio :where(.question-board-actions):not(.ui-action-row) {
  display: flex;
  gap: var(--ui-space-2, 8px);
  align-items: center;
  justify-content: flex-end;
  flex-wrap: wrap;
}

.exercise-studio .question-board-title form {
  margin: 0;
}

.exercise-studio .question-board-title .quiet-button {
  display: inline-flex;
  align-items: center;
  min-height: var(--ui-control-height, 40px);
}

.exercise-studio .exercise-board-head h2 {
  margin: 0;
  padding-top: 3px;
  color: var(--ui-text, #173044);
  font: 700 29px / 1.18 var(--serif);
}

.exercise-studio .exercise-board-head p {
  margin: 6px 0 0;
  color: var(--ui-muted, #607884);
  font-size: var(--type-helper-font-size, 12px);
}

.exercise-studio .studio-tabs {
  display: flex;
  overflow: auto;
  border-bottom: 1px solid var(--ui-border-color, #bfd0da);
  background: var(--ui-editor-toolbar-bg, var(--ui-filter-bg, #f5fafb));
}

.exercise-studio .studio-tab {
  min-height: 40px;
  padding: 0 18px;
  border: 0;
  border-right: 1px solid var(--ui-border-color, #bfd0da);
  border-radius: 0 !important;
  background: transparent;
  color: var(--ui-text, #173044);
  cursor: pointer;
  font-size: var(--type-button-size, 12px);
  white-space: nowrap;
}

.exercise-studio .studio-tab.active {
  background: var(--ui-surface, #fffdf7);
  color: var(--ui-accent, #1676a8);
  font-weight: var(--type-button-weight, 800);
}

.exercise-studio .studio-pane {
  display: none;
  padding: 24px;
}

.exercise-studio .studio-pane.active {
  display: block;
}

.exercise-studio .pane-grid {
  display: grid;
  grid-template-columns: minmax(280px, .85fr) 1.15fr;
  gap: 22px;
}

.exercise-studio :where(.form-card, .preview-card, .wave-card) {
  border: 1px solid var(--ui-border-color, #bfd0da);
  border-radius: var(--ui-panel-radius, 6px);
  background: var(--ui-empty-bg, #f7fbfc);
  color: var(--ui-text, #173044);
}

.exercise-studio :where(.form-card, .preview-card) {
  padding: 17px;
}

.exercise-studio .wave-card {
  margin-top: var(--ui-section-gap, 18px);
  padding: 15px;
}

.exercise-studio :where(.form-card h3, .preview-card h3, .wave-card h3) {
  margin: 0 0 12px;
  color: var(--ui-text, #173044);
  font-size: var(--type-section-title-size, 15px);
}

.exercise-studio .stacked-preview {
  margin-top: 20px;
}

.exercise-studio :where(.form-card label, .hotspot-picker label) {
  display: block;
  margin-top: var(--ui-field-gap, 10px);
  color: var(--ui-text, #173044);
  font-size: var(--type-form-label-size, 11px);
  font-weight: var(--type-form-label-weight, 800);
  line-height: 1.45;
}

.exercise-studio :where(.form-card input, .form-card select, .form-card textarea, .mode-line select) {
  box-sizing: border-box;
  width: 100%;
  min-height: var(--ui-control-height, 40px);
  margin-top: 5px;
  padding: 9px;
  border: 1px solid var(--ui-border-color, #bfd0da);
  border-radius: var(--ui-control-radius, 3px);
  background: var(--ui-input-bg, #fff);
  color: var(--ui-text, #173044);
  font-size: var(--type-form-control-size, var(--ui-control-font-size, 12px));
}

.exercise-studio .form-card textarea {
  min-height: 70px;
  resize: vertical;
}

.exercise-studio .two,
.exercise-studio .three {
  display: grid;
  gap: var(--ui-field-gap, 10px);
}

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

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

.exercise-studio .checks {
  display: flex;
  gap: var(--ui-space-3, 12px);
  align-items: center;
  flex-wrap: wrap;
  margin-top: var(--ui-field-gap, 10px);
  font-size: var(--type-small-font-size, 11px);
}

.exercise-studio .checks label {
  margin: 0 !important;
  font-weight: 400 !important;
}

.exercise-studio .checks input {
  width: auto !important;
  margin: 0 4px 0 0 !important;
}

.exercise-studio .primary-blue {
  margin-top: var(--ui-card-padding, 14px);
}

.exercise-studio :where(.danger, .edit-hotspot) {
  min-height: 32px !important;
  padding: 6px 8px !important;
  font-size: var(--type-badge-size, 10px) !important;
}

.exercise-studio .edit-hotspot {
  border: 1px solid var(--ui-border-color, #bfd0da);
  border-radius: var(--ui-control-radius, 3px);
  background: var(--ui-filter-bg, #f5fafb);
  color: var(--ui-text, #173044);
  cursor: pointer;
}

.exercise-studio :where(.asset-list, .hotspot-list) {
  margin: 0;
  padding: 0;
  list-style: none;
}

.exercise-studio :where(.asset-list li, .hotspot-list li) {
  padding: 11px 0;
  border-top: 1px solid var(--ui-border-color, #bfd0da);
  font-size: var(--type-small-font-size, 11px);
}

.exercise-studio .asset-list img {
  display: block;
  max-width: 160px;
  max-height: 90px;
  margin-top: 7px;
  border: 1px solid var(--ui-border-color, #bfd0da);
}

.exercise-studio :where(.asset-list .row, .hotspot-list .row) {
  display: flex;
  gap: var(--ui-space-2, 8px);
  align-items: center;
}

.exercise-studio :where(.asset-list small, .hotspot-list small, .hint, .clip-range, .mode-line) {
  color: var(--ui-muted, #607884);
  font-size: var(--type-helper-font-size, 12px);
  line-height: 1.6;
}

.exercise-studio .hotspot-workspace {
  padding: 15px;
  border: 1px solid var(--site-footer-bg, #102839);
  background: var(--ui-text, #172f42);
}

.exercise-studio :where(.hotspot-canvas, .exercise-preview) {
  position: relative;
  display: inline-block;
  max-width: 100%;
  background: var(--ui-input-bg, #fff);
  line-height: 0;
}

.exercise-studio :where(.hotspot-canvas img, .exercise-preview img) {
  display: block;
  max-width: min(100%, 800px);
  max-height: 460px;
  object-fit: contain;
}

.exercise-studio .hotspot-canvas {
  touch-action: none;
}

.exercise-studio .hotspot-canvas img {
  user-select: none;
  touch-action: none;
  -webkit-user-drag: none;
}

.exercise-studio :where(.draft-button, .saved-hotspot, .preview-hotspot) {
  position: absolute;
  z-index: 3;
  display: block !important;
  width: auto !important;
  height: auto !important;
  min-width: 0 !important;
  min-height: 0 !important;
  margin: 0 !important;
  padding: 0 !important;
  border: 0 !important;
  border-radius: 0 !important;
  background: transparent !important;
  color: var(--ui-accent, #1676a8) !important;
  box-shadow: none !important;
  font-size: 25px;
  line-height: 1;
  transform: translate(-50%, -50%);
  overflow: visible;
}

.exercise-studio .draft-button {
  display: grid;
  place-items: center;
  pointer-events: none;
}

.exercise-studio .saved-hotspot,
.exercise-studio .preview-hotspot {
  cursor: pointer;
}

.exercise-studio .preview-hotspot:disabled {
  opacity: .48;
  cursor: not-allowed;
}

.exercise-studio .preview-hotspot .hot-icon {
  line-height: 1;
}

.exercise-studio .saved-hotspot.selected {
  color: var(--ui-accent-hover, #125d84);
  filter: drop-shadow(0 1px 2px var(--ui-input-bg, #fff));
}

.exercise-studio :where(.draft-button[hidden], .draft-label[hidden], .draft-count[hidden]),
.exercise-studio .hotspot-canvas .draft-button[hidden] {
  display: none !important;
}

.exercise-studio :where(.draft-label, .saved-hotspot .hot-label, .preview-hotspot .hot-label) {
  position: absolute;
  bottom: 100%;
  left: 50%;
  padding: 1px 3px;
  background: var(--ui-surface, #fffdf7);
  color: var(--ui-text, #172f42);
  box-shadow: var(--ui-shadow-tiny, 0 1px 3px rgba(23, 47, 66, .20));
  font-size: var(--type-small-font-size, 11px);
  line-height: 1.2;
  transform: translateX(-50%);
  white-space: nowrap;
}

.exercise-studio .draft-label {
  bottom: auto !important;
  transform: translate(-50%, -145%);
}

.exercise-studio :where(.draft-count, .saved-hotspot .hot-count, .preview-hotspot .hot-count) {
  position: absolute;
  top: 50%;
  left: 100%;
  padding: 2px 4px;
  background: var(--ui-text, #172f42);
  color: var(--ui-inverse-text, #fff);
  font-size: var(--type-badge-size, 10px);
  line-height: 1.2;
  transform: translateY(-50%);
  white-space: nowrap;
}

.exercise-studio .draft-count {
  transform: translate(0, -50%);
}

.exercise-studio .hotspot-canvas .draft-button .draft-label {
  top: auto !important;
  bottom: 100% !important;
  left: 50% !important;
  transform: translateX(-50%) !important;
}

.exercise-studio .hotspot-canvas .draft-button .draft-count {
  top: 50% !important;
  left: 100% !important;
  transform: translateY(-50%) !important;
}

.exercise-studio .wave-card canvas {
  display: block;
  width: 100%;
  height: 132px;
  margin-top: var(--ui-field-gap, 10px);
  background: var(--ui-text, #172f42);
  cursor: crosshair;
  touch-action: none;
  user-select: none;
}

.exercise-studio .clip-controls {
  display: flex;
  gap: var(--ui-space-2, 8px);
  align-items: center;
  flex-wrap: wrap;
  margin-top: var(--ui-field-gap, 10px);
}

.exercise-studio .clip-controls button {
  min-height: 36px !important;
  padding: 8px 10px !important;
  font-size: var(--type-small-font-size, 11px) !important;
}

.exercise-studio .clip-controls button.secondary {
  border: 1px solid var(--ui-border-color, #bfd0da) !important;
  background: var(--ui-filter-bg, #f5fafb) !important;
  color: var(--ui-text, #173044) !important;
}

.exercise-studio .mode-line {
  display: flex;
  gap: var(--ui-space-2, 8px);
  align-items: center;
  margin-top: var(--ui-field-gap, 10px);
}

.exercise-studio .mode-line select {
  width: auto;
  min-width: 180px;
  margin: 0;
}

.exercise-studio .hotspot-picker {
  display: flex;
  gap: var(--ui-space-2, 8px);
  align-items: end;
  margin-bottom: var(--ui-field-gap, 10px);
}

.exercise-studio .hotspot-picker label {
  flex: 1;
  margin: 0 !important;
}

.exercise-studio .hotspot-picker button {
  flex: 0 0 auto;
}

.exercise-studio .preview-tabs {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin-bottom: 12px;
}

.exercise-studio .preview-tabs button {
  min-height: 36px !important;
  padding: 7px 10px !important;
  border: 1px solid var(--ui-border-color, #bfd0da) !important;
  border-radius: var(--ui-control-radius, 3px) !important;
  background: var(--ui-surface, #fffdf7) !important;
  color: var(--ui-text, #173044) !important;
  font-size: var(--type-small-font-size, 11px) !important;
}

.exercise-studio .preview-tabs button.active {
  border-color: var(--ui-accent, #1676a8) !important;
  background: var(--ui-accent, #1676a8) !important;
  color: var(--ui-inverse-text, #fff) !important;
}

.exercise-studio .preview-stat-line {
  display: flex;
  gap: 5px;
  align-items: center;
  margin-top: 16px;
  padding-top: 12px;
  border-top: 1px solid var(--ui-border-color, #bfd0da);
  color: var(--ui-muted, #607884);
  font-size: var(--type-helper-font-size, 12px);
}

.exercise-studio .preview-stat-line b {
  color: var(--ui-accent, #1676a8);
  font-size: var(--type-badge-size, 10px);
  letter-spacing: 0;
}

.exercise-studio .status-line {
  width: fit-content;
  min-height: var(--ui-status-height, 24px);
  margin-top: 12px;
  padding: 3px 9px;
  border: 1px solid color-mix(in srgb, var(--ui-accent, #1676a8) 25%, var(--ui-border-color, #bfd0da));
  border-radius: var(--ui-status-radius, 999px);
  background: var(--ui-info-bg, #edf6f8);
  color: var(--ui-accent, #1676a8);
  font-size: var(--type-badge-size, 10px);
  font-weight: var(--type-badge-weight, 800);
}

@media (max-width: 980px) {
  .exercise-studio .exercise-shell,
  .exercise-studio .pane-grid {
    grid-template-columns: 1fr;
  }

  .exercise-studio .exercise-nav {
    max-height: none;
  }

  .exercise-studio .two,
  .exercise-studio .three {
    grid-template-columns: 1fr;
  }

  .exercise-studio .admin-title {
    padding: 22px;
  }

  .exercise-studio .question-board-title {
    align-items: flex-end;
    flex-flow: row wrap;
  }

  .exercise-studio .question-board-actions {
    justify-content: flex-start;
  }
}

@media (max-width: 600px) {
  .exercise-studio .hotspot-picker {
    align-items: flex-end;
    flex-flow: row wrap;
  }

  .exercise-studio .hotspot-picker button {
    width: auto;
  }
}