/* Standalone classroom apps: isolate app layout from catalog card rules. */
.classroom-app-card {
  display: block;
  width: 100%;
  min-width: 0;
  margin-top: 26px;
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--paper);
  box-shadow: var(--shadow);
  position: relative;
  z-index: 1;
}
.classroom-app-card,
.classroom-app-card * { box-sizing: border-box; }
.classroom-app-card .tool-form-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(180px, 220px);
  gap: 22px;
  align-items: start;
  min-width: 0;
}
.classroom-app-card .tool-field {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  align-content: start;
  gap: 8px;
  min-width: 0;
}
.classroom-app-card .tool-field label {
  display: block;
  max-width: 100%;
  color: var(--ink);
  font-size: 13px;
  line-height: 1.5;
}
.classroom-app-card .tool-field textarea,
.classroom-app-card .tool-field input,
.classroom-app-card .tool-field select {
  display: block;
  width: 100%;
  min-width: 0;
  max-width: 100%;
  margin: 0;
  color: var(--ink);
  background: var(--paper);
}
.classroom-app-card .tool-field textarea {
  min-height: 190px;
  resize: vertical;
  line-height: 1.65;
}
.classroom-app-card .tool-field input[type="number"] { min-height: 46px; }
.classroom-app-card .tool-hint {
  display: block;
  max-width: 100%;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.6;
}
.classroom-app-card .tool-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  clear: both;
  margin-top: 20px;
}
.classroom-app-card .tool-button {
  display: inline-flex;
  width: auto;
  min-width: 0;
  min-height: 42px;
  align-items: center;
  justify-content: center;
  white-space: normal;
  line-height: 1.4;
}
.classroom-app-card .tool-results { min-width: 0; }
.classroom-app-card .roulette-layout {
  display: grid;
  grid-template-columns: minmax(260px, .95fr) minmax(0, 1.05fr);
  gap: clamp(24px, 4vw, 54px);
  align-items: center;
  min-width: 0;
}
.classroom-app-card .wheel-wrap {
  width: min(100%, 410px);
  min-width: 0;
  aspect-ratio: 1;
  margin-inline: auto;
  overflow: hidden;
}
.classroom-app-card .wheel-wrap canvas { display: block; width: 100%; height: 100%; }
.classroom-app-card .wheel-pointer { top: 0; }
.classroom-app-card .roulette-options { position: relative; display: grid; gap: 14px; min-width: 0; padding-bottom: 66px; }
.classroom-app-card .roulette-options textarea { min-height: 220px; }
.classroom-app-card .wheel-result { position: absolute; right: 0; bottom: 0; left: 0; min-height: 52px; margin: 0; }
.classroom-app-card .roulette-options > label { display: flex; gap: 8px; align-items: flex-start; line-height: 1.5; }
.classroom-app-card .roulette-options input[type="checkbox"] { flex: 0 0 auto; margin: 2px 0 0; }
.classroom-app-card .timer-box { width: 100%; min-width: 0; padding: 10px 0 4px; text-align: center; }
.classroom-app-card .timer-display {
  display: block;
  width: 100%;
  font-size: clamp(76px, 12vw, 132px);
  line-height: 1.08;
  letter-spacing: -.045em;
  font-variant-numeric: tabular-nums;
}
.classroom-app-card .timer-status { min-height: 24px; margin-top: 12px; }
.classroom-app-card .timer-progress { width: min(100%, 680px); }
.classroom-app-card .timer-box .tool-form-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.classroom-app-card .timer-box .tool-field { text-align: left; }
.classroom-app-card .timer-presets { display: flex; justify-content: center; flex-wrap: wrap; gap: 8px; }
.dark .classroom-app-card .tool-field textarea,
.dark .classroom-app-card .tool-field input,
.dark .classroom-app-card .tool-field select { background: var(--paper); color: var(--ink); border-color: var(--line); }
@media (max-width: 760px) {
  .classroom-app-card { padding: 20px; }
  .classroom-app-card .tool-form-grid { grid-template-columns: minmax(0, 1fr); gap: 18px; }
  .classroom-app-card .roulette-layout { grid-template-columns: minmax(0, 1fr); gap: 26px; }
  .classroom-app-card .wheel-wrap { width: min(100%, 340px); }
  .classroom-app-card .roulette-options textarea { min-height: 170px; }
  .classroom-app-card .timer-display { font-size: clamp(68px, 20vw, 110px); }
}
@media (max-width: 480px) {
  .classroom-app-card { margin-top: 18px; padding: 16px; }
  .classroom-app-card .tool-actions { align-items: stretch; }
  .classroom-app-card .tool-actions .tool-button { flex: 1 1 145px; }
  .classroom-app-card .wheel-wrap { width: min(100%, 300px); }
  .classroom-app-card .timer-display { font-size: clamp(62px, 19vw, 88px); }
  .classroom-app-card .timer-box .tool-form-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
  .classroom-app-card .timer-presets .tool-button { flex: 1 1 70px; }
}