/* === Quiz variants: true/false ============================================ */

.quiz-tf-options {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3);
  margin: var(--space-4) 0 var(--space-3);
}
.quiz-tf-btn {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4);
  background: var(--bg-card);
  border: 2px solid var(--border-primary);
  border-radius: var(--radius-md);
  font: inherit;
  color: var(--text-primary);
  text-align: left;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
}
.quiz-tf-btn:hover { border-color: var(--color-indigo); }
.quiz-tf-btn.selected { border-color: var(--color-indigo); background: var(--bg-selected, rgba(67, 56, 202, 0.06)); }
.quiz-tf-btn.correct { border-color: var(--color-emerald); background: rgba(5, 150, 105, 0.08); }
.quiz-tf-btn.incorrect { border-color: var(--color-rose); background: rgba(225, 29, 72, 0.08); }
.quiz-tf-letter {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: var(--radius-md);
  background: var(--bg-secondary);
  font-weight: 700;
  flex-shrink: 0;
}
.quiz-tf-btn.correct .quiz-tf-letter { background: var(--color-emerald); color: white; }
.quiz-tf-btn.incorrect .quiz-tf-letter { background: var(--color-rose); color: white; }
.quiz-tf-text { font-weight: 600; font-size: var(--font-base); }

/* === Quiz variants: fill-in-the-blank ==================================== */

.quiz-fib-sentence {
  font-size: var(--font-lg);
  line-height: 1.7;
  color: var(--text-primary);
  margin: var(--space-4) 0;
  padding: var(--space-4);
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
}
.quiz-fib-input {
  display: inline-block;
  min-width: 140px;
  padding: var(--space-1) var(--space-2);
  margin: 0 var(--space-1);
  border: none;
  border-bottom: 2px solid var(--color-indigo);
  background: transparent;
  font: inherit;
  font-weight: 700;
  color: var(--color-indigo);
  text-align: center;
}
.quiz-fib-input:focus {
  outline: none;
  border-bottom-color: var(--color-amber);
  color: var(--color-amber);
}
.quiz-fib-input:disabled { color: var(--text-primary); cursor: default; }
.quiz-block.correct .quiz-fib-input { color: var(--color-emerald); border-bottom-color: var(--color-emerald); }
.quiz-block.incorrect .quiz-fib-input { color: var(--color-rose); border-bottom-color: var(--color-rose); }
.quiz-fib-correct {
  margin-bottom: var(--space-3);
  padding-bottom: var(--space-3);
  border-bottom: 1px solid var(--border-primary);
  font-size: var(--font-sm);
  color: var(--text-secondary);
}

/* === Quiz variants: short-answer ========================================== */

.quiz-sa-input {
  width: 100%;
  margin: var(--space-3) 0;
  padding: var(--space-3);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-md);
  background: var(--bg-card);
  color: var(--text-primary);
  font: inherit;
  font-size: var(--font-base);
  line-height: 1.6;
  resize: vertical;
  min-height: 110px;
}
.quiz-sa-input:focus {
  outline: none;
  border-color: var(--color-indigo);
  box-shadow: 0 0 0 3px rgba(67, 56, 202, 0.12);
}
.quiz-sa-input:disabled {
  background: var(--bg-secondary);
  cursor: default;
}
.quiz-sa-reveal { background: var(--bg-secondary); }
.quiz-sa-label {
  font-size: var(--font-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-tertiary);
  margin-top: var(--space-3);
  margin-bottom: var(--space-2);
}
.quiz-sa-label:first-child { margin-top: 0; }
.quiz-sa-sample {
  padding: var(--space-3);
  background: var(--bg-card);
  border-left: 3px solid var(--color-indigo);
  border-radius: var(--radius-sm);
  line-height: 1.6;
  color: var(--text-primary);
}
.quiz-sa-keypoints {
  margin: var(--space-2) 0 0;
  padding-left: var(--space-5);
  line-height: 1.6;
  color: var(--text-secondary);
}
.quiz-sa-keypoints li { margin-bottom: var(--space-1); }

/* Poolside practice cards */
.practice-block {
  overflow: hidden;
  border: 1px solid color-mix(in srgb, var(--text-primary) 35%, var(--border-primary));
  border-radius: 16px;
  background: var(--bg-card);
}
.practice-safety {
  position: sticky;
  top: 0;
  z-index: 2;
  display: flex;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-5);
  background: #fff7ed;
  border-bottom: 1px solid #fed7aa;
  color: #9a3412;
  font-size: var(--font-sm);
  line-height: 1.45;
}
[data-theme="dark"] .practice-safety {
  background: #431407;
  border-color: #9a3412;
  color: #ffedd5;
}
.practice-safety strong { flex: none; }
.practice-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-5);
  padding: var(--space-5);
  background: linear-gradient(145deg, color-mix(in srgb, var(--yellow) 12%, var(--bg-card)), var(--bg-card) 65%);
}
.practice-eyebrow {
  display: block;
  margin-bottom: var(--space-1);
  color: var(--text-primary);
  font-size: var(--font-xs);
  font-weight: 750;
  letter-spacing: .06em;
  text-transform: uppercase;
}
.practice-header h3 {
  margin-bottom: var(--space-2);
  font-size: var(--font-xl);
}
.practice-header p {
  max-width: 54ch;
  color: var(--text-secondary);
  line-height: 1.55;
}
.practice-timer {
  flex: none;
  min-width: 166px;
  padding: var(--space-3);
  border: 1px solid var(--border-primary);
  border-radius: 12px;
  background: var(--bg-elevated);
  text-align: center;
}
.practice-timer-value {
  display: block;
  margin-bottom: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--font-2xl);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}
.practice-timer-actions {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 4px;
}
.practice-timer-actions button {
  min-height: 36px;
  padding: 0 7px;
  border: 1px solid var(--border-primary);
  border-radius: 7px;
  background: var(--bg-card);
  color: var(--text-primary);
  font: inherit;
  font-size: var(--font-xs);
  font-weight: 650;
  cursor: pointer;
}
.practice-timer-actions button:first-child {
  border-color: var(--text-primary);
  background: var(--text-primary);
  color: white;
}
.practice-timer-actions button:disabled { cursor: default; opacity: .45; }
.practice-prep {
  display: grid;
  grid-template-columns: minmax(180px, .65fr) 1.35fr;
  gap: var(--space-4);
  padding: var(--space-5);
  border-top: 1px solid var(--border-primary);
  border-bottom: 1px solid var(--border-primary);
}
.practice-prep h4,
.practice-readiness h4 {
  margin-bottom: var(--space-2);
  font-size: var(--font-sm);
  text-transform: uppercase;
  letter-spacing: .04em;
}
.practice-prep p,
.practice-compact-list {
  color: var(--text-secondary);
  font-size: var(--font-sm);
  line-height: 1.55;
}
.practice-compact-list { padding-left: var(--space-5); }
.practice-compact-list li + li { margin-top: var(--space-1); }
.practice-steps {
  margin: 0;
  padding: var(--space-2) var(--space-5);
  list-style: none;
}
.practice-steps > li {
  display: grid;
  grid-template-columns: 48px 1fr;
  gap: var(--space-3);
  padding: var(--space-4) 0;
  border-bottom: 1px solid var(--border-primary);
}
.practice-steps > li:last-child { border-bottom: 0; }
.practice-steps > li.is-complete .practice-step-body { opacity: .68; }
.practice-step-check {
  width: 48px;
  height: 48px;
  cursor: pointer;
}
.practice-step-check input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
}
.practice-step-check > span[aria-hidden] {
  display: grid;
  width: 48px;
  height: 48px;
  place-items: center;
  border: 2px solid var(--text-primary);
  border-radius: 12px;
  background: var(--bg-elevated);
}
.practice-step-check input:checked + span[aria-hidden] {
  background: var(--text-primary);
}
.practice-step-check input:checked + span[aria-hidden]::after {
  content: "✓";
  color: white;
  font-size: 25px;
  font-weight: 800;
}
.practice-step-check input:focus-visible + span[aria-hidden] {
  outline: 3px solid color-mix(in srgb, var(--text-primary) 35%, transparent);
  outline-offset: 3px;
}
.practice-step-title {
  margin-bottom: var(--space-1);
  font-weight: 750;
}
.practice-step-body > p {
  color: var(--text-secondary);
  line-height: 1.55;
}
.practice-step-body dl {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2) var(--space-4);
  margin-top: var(--space-2);
  font-size: var(--font-sm);
}
.practice-step-body dl div { display: flex; gap: var(--space-1); }
.practice-step-body dt { color: var(--text-primary); font-weight: 750; }
.practice-step-body dd { color: var(--text-secondary); }
.practice-adjustments {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--border-primary);
  border-bottom: 1px solid var(--border-primary);
}
.practice-adjustments details { padding: var(--space-4); }
.practice-adjustments details + details { border-left: 1px solid var(--border-primary); }
.practice-adjustments summary {
  min-height: 36px;
  cursor: pointer;
  font-size: var(--font-sm);
  font-weight: 700;
}
.practice-adjustments details[open] summary { margin-bottom: var(--space-2); }
.practice-stop-details summary { color: var(--text-primary); }
.practice-readiness { padding: var(--space-5); }
.practice-readiness > p {
  margin-bottom: var(--space-3);
  color: var(--text-secondary);
  font-size: var(--font-sm);
}
.practice-skill-row {
  display: grid;
  grid-template-columns: 1fr minmax(175px, auto);
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) 0;
  border-top: 1px solid var(--border-primary);
  font-size: var(--font-sm);
}
.practice-skill-row select {
  min-height: 44px;
  padding: 0 var(--space-3);
  border: 1px solid var(--border-primary);
  border-radius: 9px;
  background: var(--bg-elevated);
  color: var(--text-primary);
  font: inherit;
}
.practice-save-status {
  min-height: 18px;
  padding: 0 var(--space-5) var(--space-4);
  color: var(--text-tertiary);
  font-size: var(--font-xs);
}
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}
@media (max-width: 640px) {
  .practice-safety,
  .practice-header { flex-direction: column; }
  .practice-timer { width: 100%; }
  .practice-prep,
  .practice-adjustments { grid-template-columns: 1fr; }
  .practice-adjustments details + details {
    border-top: 1px solid var(--border-primary);
    border-left: 0;
  }
  .practice-skill-row { grid-template-columns: 1fr; }
  .practice-skill-row select { width: 100%; }
}

.diagram-fallback {
  padding: var(--space-5);
  border: 1px dashed var(--border-secondary);
  background:
    linear-gradient(135deg, color-mix(in srgb, var(--primary) 7%, transparent), transparent 60%),
    var(--bg-secondary);
}

.topic-image{width:min(100%,360px);margin:32px auto}.topic-image img{width:100%;height:auto;border-radius:12px}.topic-image figcaption{font-size:13px;color:var(--text-secondary);margin-top:12px}.course-byline{font-family:var(--font-mono);font-size:12px;margin:16px 0}.practice-block{border-color:var(--border-primary)}.practice-eyebrow,.practice-step-body dt{color:var(--text-primary)}.practice-safety{background:var(--yellow-light);color:var(--text-primary)}.practice-step-check input:checked+span[aria-hidden]{background:var(--text-primary);border-color:var(--text-primary)}.practice-step-check input:focus-visible+span[aria-hidden]{outline-color:var(--pink)}.practice-header h3{letter-spacing:-.025em}.practice-skill-row select{min-height:44px;border-color:var(--text-secondary)}.static-course section{margin-block:32px}.static-course p{margin-block:16px}.static-course li{margin-block:10px}

button.drag-left-item,button.drag-right-item{font:inherit;text-align:left;color:inherit;width:100%;min-height:44px}button.drag-left-item:focus-visible,button.drag-right-item:focus-visible{outline:3px solid var(--pink);outline-offset:3px}