/* ==========================================================================
   Classroom Tools — Smartboard Picker & Dot-to-Dot Studio
   Desktop-first, large controls, plain-language steps for teachers
   ========================================================================== */

.classroom-tool-view {
  width: 100%;
  min-height: calc(100vh - 73px);
  height: calc(100vh - 73px);
  overflow: hidden;
  flex-direction: column;
}

.classroom-tool-layout {
  display: grid;
  grid-template-columns: minmax(320px, 380px) 1fr;
  height: 100%;
  min-height: calc(100vh - 73px);
  background: var(--bg-app);
}

.classroom-tool-sidebar {
  background: var(--bg-card);
  border-right: 1px solid var(--border-glass);
  padding: 1.25rem 1.5rem 1.5rem;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  height: 100%;
  box-sizing: border-box;
}

.classroom-tool-header {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.classroom-tool-header h2 {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text-main);
  margin: 0;
  line-height: 1.2;
}

.classroom-tool-intro {
  font-size: 0.95rem;
  color: var(--text-muted);
  margin: 0;
  line-height: 1.5;
}

.classroom-step {
  background: rgba(15, 23, 42, 0.25);
  border: 1px solid var(--border-glass);
  border-radius: 10px;
  padding: 1.1rem 1.15rem;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.classroom-step h3 {
  font-size: 1rem;
  font-weight: 800;
  color: var(--text-main);
  margin: 0;
}

.classroom-step-help {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin: 0;
  line-height: 1.45;
}

.classroom-step-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.classroom-step-footer span {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-muted);
}

.classroom-textarea,
.classroom-input,
.classroom-select {
  width: 100%;
  padding: 0.75rem 0.85rem;
  background: var(--bg-input);
  border: 1px solid var(--border-glass);
  border-radius: 8px;
  color: var(--text-main);
  font-size: 1rem;
  font-family: inherit;
  line-height: 1.5;
  box-sizing: border-box;
}

.classroom-textarea {
  resize: vertical;
  min-height: 180px;
}

.classroom-input:focus,
.classroom-textarea:focus,
.classroom-select:focus {
  outline: 2px solid rgba(99, 102, 241, 0.45);
  border-color: rgba(99, 102, 241, 0.5);
}

.classroom-btn-block {
  width: 100%;
  justify-content: center;
  font-size: 0.95rem;
  padding: 0.65rem 1rem;
}

.classroom-btn-large {
  font-size: 1.05rem !important;
  padding: 0.85rem 2rem !important;
  font-weight: 700 !important;
}

.classroom-segmented {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.5rem;
}

.classroom-segmented .nav-btn {
  justify-content: center;
  font-size: 0.95rem;
  padding: 0.65rem 0.5rem;
}

/* Picker mode chooser */
.picker-mode-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.55rem;
}

.picker-mode-btn {
  display: grid;
  grid-template-columns: auto 1fr;
  grid-template-rows: auto auto;
  gap: 0.1rem 0.65rem;
  align-items: center;
  text-align: left;
  padding: 0.75rem 0.85rem;
  border-radius: 10px;
  border: 2px solid var(--border-glass);
  background: rgba(15, 23, 42, 0.35);
  color: var(--text-main);
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s, transform 0.1s;
  font-family: inherit;
}

.picker-mode-btn:hover {
  border-color: rgba(99, 102, 241, 0.45);
  background: rgba(99, 102, 241, 0.08);
}

.picker-mode-btn.is-active {
  border-color: #6366f1;
  background: rgba(99, 102, 241, 0.18);
  box-shadow: 0 0 0 1px rgba(99, 102, 241, 0.25);
}

.picker-mode-icon {
  grid-row: 1 / span 2;
  font-size: 1.65rem;
  line-height: 1;
}

.picker-mode-label {
  font-size: 0.95rem;
  font-weight: 800;
}

.picker-mode-desc {
  grid-column: 2;
  font-size: 0.82rem;
  color: var(--text-muted);
}

.picker-stage-hint {
  position: absolute;
  top: 3.5rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 45;
  margin: 0;
  padding: 0.55rem 1.1rem;
  border-radius: 999px;
  background: rgba(15, 23, 42, 0.82);
  border: 1px solid rgba(99, 102, 241, 0.35);
  color: #e2e8f0;
  font-size: clamp(0.95rem, 2vw, 1.15rem);
  font-weight: 700;
  text-align: center;
  max-width: calc(100% - 2rem);
  pointer-events: none;
  backdrop-filter: blur(8px);
}

.picker-hat-wrap {
  position: absolute;
  inset: 0;
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1.25rem;
  padding: 4.5rem 1.5rem 2rem;
  box-sizing: border-box;
}

.picker-hat-canvas {
  width: min(560px, 92vw);
  height: min(480px, 58vh);
  max-height: 100%;
}

.picker-grab-btn {
  min-width: 220px;
  padding: 1rem 2.5rem;
  border-radius: 999px;
  border: 3px solid rgba(251, 191, 36, 0.55);
  background: linear-gradient(180deg, #fbbf24 0%, #d97706 100%);
  color: #1e1b4b;
  font-family: 'Inter', sans-serif;
  font-size: clamp(1.1rem, 2.5vw, 1.35rem);
  font-weight: 900;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  cursor: pointer;
  box-shadow: 0 8px 28px rgba(0, 0, 0, 0.45), 0 0 40px rgba(251, 191, 36, 0.15);
  transition: transform 0.12s, box-shadow 0.12s, opacity 0.12s;
}

.picker-grab-btn:hover:not(:disabled) {
  transform: scale(1.04);
  box-shadow: 0 10px 32px rgba(0, 0, 0, 0.5), 0 0 50px rgba(251, 191, 36, 0.25);
}

.picker-grab-btn:active:not(:disabled) {
  transform: scale(0.96);
}

.picker-grab-btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.classroom-check {
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
  font-size: 0.95rem;
  color: var(--text-main);
  cursor: pointer;
  line-height: 1.45;
}

.classroom-check input {
  width: 1.1rem;
  height: 1.1rem;
  margin-top: 0.15rem;
  accent-color: #6366f1;
  flex-shrink: 0;
}

.classroom-privacy-note {
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid rgba(16, 185, 129, 0.3);
  border-radius: 8px;
  padding: 0.85rem 1rem;
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.45;
}

.classroom-privacy-note strong {
  color: #10b981;
}

.classroom-tool-stage {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  min-height: 0;
  height: 100%;
}

.classroom-tool-stage--dark {
  background: #0a0f1e;
}

.classroom-tool-stage--preview {
  background: #0f172a;
  padding: 1.5rem 2rem;
  flex-direction: column;
}

.classroom-badge {
  background: rgba(16, 185, 129, 0.15);
  border: 1px solid rgba(16, 185, 129, 0.35);
  border-radius: 999px;
  padding: 0.35rem 0.85rem;
  font-size: 0.85rem;
  font-weight: 700;
  color: #10b981;
}

.classroom-badge--corner {
  position: absolute;
  top: 1rem;
  right: 1rem;
  z-index: 40;
}

.classroom-export-btn {
  margin-top: auto;
  width: 100%;
  justify-content: center;
  font-size: 1.05rem;
  font-weight: 700;
  padding: 0.85rem 1rem;
}

/* ── Smartboard Picker ── */

.classroom-tool-layout--picker {
  position: relative;
}

.picker-stage-toolbar {
  position: absolute;
  top: 1rem;
  left: 1rem;
  right: 1rem;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  pointer-events: none;
}

.picker-stage-toolbar .nav-btn {
  pointer-events: auto;
}

.picker-stage-toolbar-left,
.picker-stage-toolbar-right {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.picker-stage-toolbar .nav-btn {
  backdrop-filter: blur(8px);
  background: rgba(15, 23, 42, 0.75);
  font-size: 0.9rem;
  padding: 0.45rem 0.9rem;
}

.picker-stage-toolbar .picker-toolbar-back {
  display: none;
}

#pw-fullscreen-btn[aria-pressed="true"] {
  border-color: rgba(99, 102, 241, 0.65);
  background: rgba(99, 102, 241, 0.22);
  color: #c7d2fe;
}

/* Collapsible sidebar (desktop + mobile drawer) */
.classroom-tool-layout--picker.picker-sidebar-collapsed {
  grid-template-columns: 0 minmax(0, 1fr) !important;
}

.classroom-tool-layout--picker.picker-sidebar-collapsed #pw-settings-drawer {
  overflow: hidden;
  opacity: 0;
  pointer-events: none;
  padding: 0;
  border: none;
  min-width: 0;
  width: 0 !important;
}

.classroom-tool-stage:fullscreen,
.classroom-tool-stage:-webkit-full-screen {
  width: 100vw;
  height: 100vh;
  max-height: 100vh;
  background: #0a0f1e;
}

.classroom-tool-stage:fullscreen .picker-stage-toolbar,
.classroom-tool-stage:-webkit-full-screen .picker-stage-toolbar {
  top: max(1rem, env(safe-area-inset-top, 0px));
  left: max(1rem, env(safe-area-inset-left, 0px));
  right: max(1rem, env(safe-area-inset-right, 0px));
}

.picker-wheel-wrap {
  position: relative;
  width: min(72vh, 72vw, 640px);
  height: min(72vh, 72vw, 640px);
  max-width: 100%;
  max-height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.picker-pointer {
  position: absolute;
  right: -22px;
  top: 50%;
  transform: translateY(-50%);
  width: 0;
  height: 0;
  border-top: 22px solid transparent;
  border-bottom: 22px solid transparent;
  border-right: 34px solid white;
  z-index: 10;
  filter: drop-shadow(-3px 0 6px rgba(0, 0, 0, 0.6));
}

#pw-canvas {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  box-shadow: 0 0 60px rgba(99, 102, 241, 0.3), 0 0 120px rgba(0, 0, 0, 0.6);
}

.picker-spin-btn {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 96px;
  height: 96px;
  border-radius: 50%;
  background: white;
  border: 4px solid rgba(99, 102, 241, 0.5);
  font-weight: 900;
  font-size: 1.15rem;
  color: #0f172a;
  cursor: pointer;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
  z-index: 11;
  font-family: 'Inter', sans-serif;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  transition: transform 0.1s, box-shadow 0.1s;
}

.picker-spin-btn:hover {
  box-shadow: 0 6px 28px rgba(99, 102, 241, 0.45);
}

.picker-cards-canvas,
.picker-confetti-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.picker-cards-canvas {
  display: none;
  cursor: pointer;
}

.picker-confetti-canvas {
  pointer-events: none;
  z-index: 20;
}

.picker-winner-modal {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(0.9);
  opacity: 0;
  pointer-events: none;
  background: rgba(10, 15, 30, 0.97);
  border: 1px solid rgba(99, 102, 241, 0.4);
  padding: 3rem 4rem;
  border-radius: 20px;
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.7), 0 0 60px rgba(99, 102, 241, 0.15);
  text-align: center;
  z-index: 30;
  backdrop-filter: blur(20px);
  transition: all 0.35s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  max-width: calc(100% - 2rem);
}

.picker-winner-label {
  font-size: 1rem;
  color: #818cf8;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 3px;
  margin-bottom: 0.75rem;
}

.picker-winner-name {
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 900;
  color: white;
  margin-bottom: 2rem;
  text-shadow: 0 2px 20px rgba(99, 102, 241, 0.6);
  word-break: break-word;
}

#pw-settings-drawer .classroom-tool-header .btn-back {
  align-self: flex-start;
  margin-bottom: 0.25rem;
}

#pw-settings-close-btn {
  padding: 0.35rem 0.65rem;
  font-size: 0.85rem;
}

.picker-sidebar-header-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.5rem;
}

/* ── Dot-to-Dot Studio ── */

.dtd-canvas-wrapper {
  width: 100%;
  max-width: 820px;
  max-height: calc(100vh - 73px - 4rem);
  aspect-ratio: 1 / 1.414;
  background: white;
  border-radius: 6px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
  position: relative;
  overflow: hidden;
}

#dtd-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  touch-action: none;
  cursor: crosshair;
}

.dtd-sub-options {
  margin-bottom: 0.5rem;
}

.dtd-step-progress {
  display: flex;
  gap: 0.35rem;
  margin: 0 0 1rem;
  flex-wrap: wrap;
}

.dtd-step-pill {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  padding: 0.35rem 0.55rem;
  border-radius: 999px;
  border: 1px solid var(--border-glass);
  color: var(--text-muted);
  background: rgba(15, 23, 42, 0.35);
}

.dtd-step-pill.is-active {
  color: #c7d2fe;
  border-color: rgba(99, 102, 241, 0.55);
  background: rgba(99, 102, 241, 0.16);
}

.dtd-method-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.55rem;
  margin-bottom: 1rem;
}

.dtd-method-btn {
  display: grid;
  grid-template-columns: auto 1fr;
  grid-template-rows: auto auto;
  gap: 0.08rem 0.55rem;
  align-items: center;
  text-align: left;
  padding: 0.65rem 0.7rem;
  border-radius: 10px;
  border: 2px solid var(--border-glass);
  background: rgba(15, 23, 42, 0.35);
  color: var(--text-main);
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
  font-family: inherit;
}

.dtd-method-btn:hover {
  border-color: rgba(99, 102, 241, 0.45);
  background: rgba(99, 102, 241, 0.08);
}

.dtd-method-btn.is-active {
  border-color: #6366f1;
  background: rgba(99, 102, 241, 0.18);
  box-shadow: 0 0 0 1px rgba(99, 102, 241, 0.25);
}

.dtd-method-icon {
  grid-row: 1 / span 2;
  font-size: 1.35rem;
  line-height: 1;
}

.dtd-method-label {
  font-size: 0.88rem;
  font-weight: 800;
}

.dtd-method-desc {
  grid-column: 2;
  font-size: 0.75rem;
  color: var(--text-muted);
}

.dtd-method-panel {
  margin-bottom: 0.75rem;
}

.dtd-chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin: 0.25rem 0 0.85rem;
}

.dtd-chip {
  border: 1px solid var(--border-glass);
  background: rgba(15, 23, 42, 0.45);
  color: var(--text-main);
  border-radius: 999px;
  padding: 0.28rem 0.65rem;
  font-size: 0.78rem;
  cursor: pointer;
  font-family: inherit;
  transition: border-color 0.15s, background 0.15s;
}

.dtd-chip:hover {
  border-color: rgba(99, 102, 241, 0.5);
  background: rgba(99, 102, 241, 0.12);
}

.dtd-dot-count-block {
  padding-top: 0.5rem;
  border-top: 1px solid var(--border-glass);
}

.dtd-dot-presets {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin: 0.35rem 0 0.5rem;
}

.dtd-dot-preset {
  border: 1px solid var(--border-glass);
  background: rgba(15, 23, 42, 0.35);
  color: var(--text-muted);
  border-radius: 8px;
  padding: 0.3rem 0.5rem;
  font-size: 0.72rem;
  cursor: pointer;
  font-family: inherit;
}

.dtd-dot-preset.is-active,
.dtd-dot-preset:hover {
  border-color: rgba(99, 102, 241, 0.5);
  color: var(--text-main);
  background: rgba(99, 102, 241, 0.12);
}

.dtd-file-status {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin: 0.35rem 0 0.75rem;
}

.dtd-inline-actions {
  display: flex;
  gap: 0.5rem;
  margin-top: 0.5rem;
}

.dtd-inline-actions .nav-btn {
  flex: 1;
}

.dtd-preview-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  width: 100%;
  max-width: 820px;
  margin-bottom: 0.75rem;
  flex-wrap: wrap;
}

.dtd-preview-status {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  min-width: 0;
}

.dtd-status-badge {
  display: inline-flex;
  align-items: center;
  width: fit-content;
  font-size: 0.78rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 0.25rem 0.55rem;
  border-radius: 999px;
  background: rgba(148, 163, 184, 0.15);
  color: #cbd5e1;
}

.dtd-status-badge.is-ready {
  background: rgba(34, 197, 94, 0.18);
  color: #86efac;
}

.dtd-status-detail {
  font-size: 0.82rem;
  color: #94a3b8;
}

.dtd-preview-actions {
  display: flex;
  gap: 0.4rem;
  flex-wrap: wrap;
}

.dtd-toolbar-btn {
  font-size: 0.78rem;
  padding: 0.35rem 0.65rem;
}

.dtd-toolbar-btn.is-active {
  border-color: #6366f1;
  background: rgba(99, 102, 241, 0.18);
}

.dtd-empty-state {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 2rem;
  pointer-events: none;
  z-index: 1;
}

.dtd-empty-state.is-hidden {
  display: none;
}

.dtd-empty-icon {
  font-size: 1.5rem;
  font-weight: 900;
  letter-spacing: 0.2em;
  color: #cbd5e1;
  margin-bottom: 0.75rem;
}

.dtd-empty-title {
  margin: 0 0 0.35rem;
  font-size: 1.05rem;
  font-weight: 800;
  color: #64748b;
}

.dtd-empty-hint {
  margin: 0;
  max-width: 18rem;
  font-size: 0.85rem;
  color: #94a3b8;
  line-height: 1.45;
}

#dtd-canvas {
  z-index: 2;
}

.dtd-export-step {
  border-top: 1px solid var(--border-glass);
  padding-top: 0.5rem;
}

.dtd-gallery-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.45rem;
  margin-bottom: 0.5rem;
}

.dtd-gallery-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.2rem;
  padding: 0.55rem 0.35rem;
  border-radius: 10px;
  border: 1px solid var(--border-glass);
  background: rgba(15, 23, 42, 0.35);
  color: var(--text-main);
  cursor: pointer;
  font-family: inherit;
  font-size: 0.72rem;
  font-weight: 700;
  transition: border-color 0.15s, background 0.15s;
}

.dtd-gallery-btn:hover {
  border-color: rgba(99, 102, 241, 0.5);
  background: rgba(99, 102, 241, 0.12);
}

.dtd-gallery-btn span:first-child {
  font-size: 1.35rem;
}

.dtd-level-preset {
  border: 1px solid var(--border-glass);
  background: rgba(15, 23, 42, 0.35);
  color: var(--text-muted);
  border-radius: 8px;
  padding: 0.3rem 0.5rem;
  font-size: 0.72rem;
  cursor: pointer;
  font-family: inherit;
}

.dtd-level-preset.is-active,
.dtd-level-preset:hover {
  border-color: rgba(99, 102, 241, 0.5);
  color: var(--text-main);
  background: rgba(99, 102, 241, 0.12);
}

.dtd-edit-tools {
  display: flex;
  gap: 0.45rem;
  margin: 0.35rem 0 0.25rem;
}

.dtd-edit-btn {
  flex: 1;
  font-size: 0.78rem;
  padding: 0.4rem 0.5rem;
}

.dtd-edit-btn.is-active {
  border-color: #6366f1;
  background: rgba(99, 102, 241, 0.18);
}

.dtd-label-strip-wrap {
  width: 100%;
  max-width: 820px;
  margin-top: 0.65rem;
  padding: 0.55rem 0.65rem;
  border-radius: 8px;
  border: 1px solid var(--border-glass);
  background: rgba(15, 23, 42, 0.35);
}

.dtd-label-strip-wrap.is-hidden {
  display: none;
}

.dtd-label-strip-title {
  display: block;
  font-size: 0.68rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  margin-bottom: 0.35rem;
}

.dtd-label-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem;
  align-items: center;
  font-size: 0.78rem;
  color: #cbd5e1;
}

.dtd-label-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.2rem;
  padding: 0.15rem 0.45rem;
  border-radius: 999px;
  background: rgba(148, 163, 184, 0.12);
  border: 1px solid rgba(148, 163, 184, 0.2);
}

.dtd-label-arrow {
  color: #64748b;
  font-size: 0.7rem;
}

.dtd-magnifier {
  position: absolute;
  width: 120px;
  height: 120px;
  border-radius: 50%;
  border: 3px solid #6366f1;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.45);
  overflow: hidden;
  pointer-events: none;
  z-index: 5;
  background: #fff;
}

.dtd-magnifier.is-hidden {
  display: none;
}

#dtd-magnifier-canvas {
  width: 100%;
  height: 100%;
}

#view-dot-to-dot.dtd-fullscreen-preview .classroom-tool-sidebar {
  display: none !important;
}

#view-dot-to-dot.dtd-fullscreen-preview .classroom-tool-layout {
  grid-template-columns: 1fr !important;
}

#view-dot-to-dot.dtd-fullscreen-preview .classroom-tool-stage--preview {
  min-height: calc(100vh - 73px);
  padding: 1rem 1.5rem;
}

#view-dot-to-dot.dtd-fullscreen-preview .dtd-canvas-wrapper {
  max-width: min(920px, 90vh * 0.707);
  max-height: 90vh;
}

#view-dot-to-dot.dtd-fullscreen-preview .dtd-label-strip-wrap,
#view-dot-to-dot.dtd-fullscreen-preview .dtd-preview-toolbar {
  max-width: min(920px, 90vh * 0.707);
}

#view-dot-to-dot.is-edit-move #dtd-canvas,
#view-dot-to-dot.is-edit-reorder #dtd-canvas {
  cursor: grab;
}

#view-dot-to-dot.is-edit-reorder #dtd-canvas {
  cursor: pointer;
}

.classroom-range {
  width: 100%;
  margin: 0.25rem 0 0.75rem;
}

/* Desktop: sidebar collapsible via toolbar; drawer slides on mobile only */
@media (min-width: 900px) {
  #view-picker-wheel #pw-settings-drawer {
    position: relative !important;
    transform: none !important;
    width: auto !important;
    height: auto !important;
    box-shadow: none !important;
    z-index: 1 !important;
    border-left: none;
    border-right: 1px solid var(--border-glass);
    transition: opacity 0.25s ease, width 0.25s ease, padding 0.25s ease;
  }

  #view-picker-wheel #pw-settings-close-btn {
    display: none !important;
  }

  #view-picker-wheel .classroom-tool-header .btn-back {
    display: inline-flex;
  }

  .classroom-tool-layout--picker {
    transition: grid-template-columns 0.25s ease;
  }
}

/* Mobile: picker drawer slides in; dot-to-dot stacks */
@media (max-width: 899px) {
  .classroom-tool-layout {
    grid-template-columns: 1fr;
    grid-template-rows: 1fr auto;
    height: auto;
    min-height: calc(100vh - 73px);
    overflow: visible;
  }

  .classroom-tool-view {
    height: auto;
    min-height: calc(100vh - 73px);
    overflow: auto;
  }

  #view-picker-wheel .classroom-tool-layout--picker {
    grid-template-rows: min(55vh, 420px) auto;
  }

  #view-picker-wheel #pw-settings-drawer {
    position: fixed !important;
    top: 73px;
    right: 0;
    width: min(360px, 92vw) !important;
    height: calc(100vh - 73px) !important;
    transform: translateX(100%);
    z-index: 120 !important;
    box-shadow: -10px 0 40px rgba(0, 0, 0, 0.55);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  }

  #view-picker-wheel #pw-settings-drawer.picker-drawer-open {
    transform: translateX(0) !important;
  }

  #view-picker-wheel .classroom-tool-header .btn-back {
    display: none;
  }

  .picker-stage-toolbar .picker-toolbar-back {
    display: inline-flex;
  }

  .classroom-tool-stage--preview {
    min-height: 45vh;
    padding: 1rem;
  }

  #view-dot-to-dot .classroom-tool-layout {
    display: flex;
    flex-direction: column;
  }

  #view-dot-to-dot .classroom-tool-sidebar {
    order: 2;
    height: auto;
    border-right: none;
    border-top: 1px solid var(--border-glass);
  }

  #view-dot-to-dot .classroom-tool-stage--preview {
    order: 1;
    min-height: 42vh;
  }

  .dtd-method-grid {
    grid-template-columns: 1fr;
  }

  .dtd-gallery-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  #view-dot-to-dot #dtd-canvas {
    touch-action: none;
  }

  .dtd-preview-toolbar {
    max-width: none;
  }

  .picker-wheel-wrap {
    width: min(85vw, 85vh, 420px);
    height: min(85vw, 85vh, 420px);
  }
}