/* Practice blocks: quiz, Python workbench, explain it back. */

/* ---------- Quiz ---------- */

.quiz__set {
  border: 0;
  margin: 0;
  padding: 0;
  min-width: 0;
}

.quiz__question {
  padding: 0;
  margin-bottom: var(--space-s);
  font-size: var(--step-1);
  font-weight: 700;
  line-height: 1.3;
}

.quiz__choices {
  display: grid;
  gap: 0.6rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.quiz__choice {
  border: 1.5px solid var(--line-strong);
  border-radius: var(--radius-s);
  background: var(--sheet);
  transition: border-color var(--dur-fast) ease, background-color var(--dur-fast) ease;
}

.quiz__choice:hover {
  border-color: var(--violet);
}

.quiz__choice:has(input:checked) {
  border-color: var(--violet);
  background: var(--violet-tint);
}

.quiz__label {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 0.75rem;
  min-height: 52px;
  padding: 0.6rem 0.9rem;
  cursor: pointer;
}

.quiz__input {
  width: 1.25rem;
  height: 1.25rem;
  margin: 0;
  accent-color: var(--violet);
}

.quiz__mark {
  display: none;
}

.quiz__verdict {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  white-space: nowrap;
}

.quiz__why {
  padding: 0 0.9rem 0.8rem calc(0.9rem + 1.25rem + 0.75rem);
  font-size: var(--step--1);
  color: var(--ink-soft);
}

.is-checked .quiz__choice {
  opacity: 0.85;
}

.is-checked .quiz__label {
  cursor: default;
}

.quiz__choice.is-correct {
  border-color: var(--ok);
  background: var(--ok-tint);
  opacity: 1;
}

.quiz__choice.is-correct .quiz__verdict { color: var(--ok); }

.quiz__choice.is-wrong {
  border-color: var(--bad);
  background: var(--bad-tint);
  opacity: 1;
}

.quiz__choice.is-wrong .quiz__verdict { color: var(--bad); }

.quiz__choice:not(.is-correct):not(.is-wrong) .quiz__verdict { color: var(--ink-faint); }

.quiz__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
  margin-top: var(--space-s);
}

.quiz__result {
  margin: 0;
  font-weight: 650;
}

.quiz__result[data-kind="ok"] { color: var(--ok); }
.quiz__result[data-kind="bad"] { color: var(--bad); }

/* ---------- Python workbench ---------- */

.block--python {
  --editor-bg: #0e1828;
  --editor-ink: #e6ecf6;
  --editor-dim: #8b98b0;
  --editor-line: #22314a;
}

.py__brief {
  margin-bottom: var(--space-s);
}

.editor__frame {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  border-radius: var(--radius-s);
  background: var(--editor-bg);
  border: 1px solid var(--editor-line);
  overflow: hidden;
  box-shadow: inset 0 1px 0 rgb(255 255 255 / 0.04);
}

.editor__frame:focus-within {
  outline: 3px solid var(--focus);
  outline-offset: 2px;
}

.editor__gutter,
.editor__input {
  margin: 0;
  padding: 0.85rem 0.75rem;
  font-family: var(--font-mono);
  font-size: 1rem;
  line-height: 1.6;
}

.editor__gutter {
  min-width: 3rem;
  overflow: hidden;
  text-align: right;
  color: var(--editor-dim);
  border-right: 1px solid var(--editor-line);
  user-select: none;
}

.editor__input {
  width: 100%;
  min-height: 10rem;
  border: 0;
  resize: vertical;
  background: transparent;
  color: var(--editor-ink);
  caret-color: var(--brand-electric);
  white-space: pre;
  overflow: auto;
  tab-size: 4;
}

.editor__input:focus {
  outline: none;
}

.editor__help {
  margin: 0.35rem 0 0;
  font-size: 0.68rem;
}

.py__toolbar {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.5rem;
  margin-top: var(--space-xs);
}

.py__primary,
.py__secondary {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.py__extras:not(:empty) {
  margin-top: var(--space-xs);
}

.py__hint {
  margin-top: var(--space-xs);
  padding: var(--space-xs) var(--space-s);
  border-radius: var(--radius-s);
  background: var(--key-tint);
  border: 1px solid var(--key-stroke);
}

.py__solution {
  display: grid;
  gap: 0.5rem;
  justify-items: start;
  padding: var(--space-s);
  border-radius: var(--radius-s);
  border: 1.5px dashed var(--key-stroke);
  background: var(--key-tint);
}

.py__solution-code {
  margin: 0;
  width: 100%;
  overflow-x: auto;
  padding: var(--space-xs);
  border-radius: var(--radius-s);
  background: var(--editor-bg);
  color: var(--editor-ink);
}

.py__results {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 17rem), 1fr));
  gap: var(--space-xs);
  margin-top: var(--space-s);
}

.py__output {
  display: flex;
  flex-direction: column;
  border-radius: var(--radius-s);
  background: var(--editor-bg);
  border: 1px solid var(--editor-line);
  color: var(--editor-ink);
  min-width: 0;
}

.py__output-head {
  display: flex;
  justify-content: space-between;
  padding: 0.5rem 0.85rem;
  border-bottom: 1px solid var(--editor-line);
}

.py__output-head .annot {
  color: var(--editor-dim);
}

.py__output[data-state="error"] .py__output-state { color: #fca5a5; }
.py__output[data-state="done"] .py__output-state { color: #86efac; }
.py__output[data-state="running"] .py__output-state { color: var(--brand-electric); }

.py__output-body {
  margin: 0;
  padding: 0.75rem 0.85rem;
  min-height: 7rem;
  max-height: 18rem;
  overflow: auto;
  font-size: 0.86rem;
  line-height: 1.55;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.py__muted { color: var(--editor-dim); }
.py__err { color: #fca5a5; }

.py__loading {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--brand-electric);
}

.py__loading::before {
  content: "";
  width: 0.9rem;
  height: 0.9rem;
  border: 2px solid currentColor;
  border-right-color: transparent;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

.py__checks-wrap {
  padding: 0.6rem 0.85rem;
  border-radius: var(--radius-s);
  border: 1px solid var(--line);
  background: var(--sheet-sunk);
  min-width: 0;
}

.py__check-summary {
  margin: 0 0 0.4rem;
}

.py__check-summary[data-state="pass"] { color: var(--ok); }
.py__check-summary[data-state="fail"] { color: var(--bad); }

.py__checks {
  display: grid;
  gap: 0.25rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.py__check {
  display: grid;
  grid-template-columns: 1.5rem minmax(0, 1fr);
  gap: 0 0.5rem;
  padding: 0.4rem 0;
  border-bottom: 1px dashed var(--line);
  font-size: var(--step--1);
}

.py__check:last-child {
  border-bottom: 0;
}

.py__check-icon {
  grid-row: span 2;
  display: grid;
  place-items: center;
  width: 1.4rem;
  height: 1.4rem;
  margin-top: 0.1rem;
  border-radius: 50%;
  border: 1.5px dashed var(--line-strong);
}

.py__check-icon .icon {
  width: 0.85rem;
  height: 0.85rem;
}

.py__check-label {
  font-weight: 600;
}

.py__check-msg {
  grid-column: 2;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--ink-faint);
  overflow-wrap: anywhere;
}

.py__check[data-state="running"] .py__check-icon {
  border: 2px solid var(--ai-stroke);
  border-right-color: transparent;
  animation: spin 0.8s linear infinite;
}

.py__check[data-state="pass"] .py__check-icon {
  border: 0;
  background: var(--ok);
  color: var(--sheet);
}

.py__check[data-state="pass"] .py__check-msg { color: var(--ok); }

.py__check[data-state="fail"] .py__check-icon {
  border: 0;
  background: var(--bad);
  color: var(--sheet);
}

.py__check[data-state="fail"] .py__check-msg { color: var(--bad); }

/* A "solved" stamp once every check passes. */
.block--python.is-solved::after {
  content: "Solved ✓";
  position: absolute;
  top: var(--space-s);
  right: var(--space-s);
  padding: 0.2rem 0.6rem;
  border: 2px solid var(--ok);
  border-radius: var(--radius-s);
  color: var(--ok);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  transform: rotate(-4deg);
  background: var(--ok-tint);
}

/* ---------- Explain it back ---------- */

.explain {
  display: grid;
  gap: var(--space-xs);
}

.explain__prompt {
  font-size: var(--step-1);
  font-weight: 700;
  line-height: 1.35;
}

.explain__input {
  min-height: 9rem;
  resize: vertical;
  line-height: 1.55;
  font-size: 1rem;
}

.explain__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
}

.explain__rubric {
  margin-top: var(--space-xs);
  padding: var(--space-s);
  border-radius: var(--radius-s);
  background: var(--key-tint);
  border: 1px solid var(--key-stroke);
}

.explain__rubric-title {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  margin: 0 0 var(--space-2xs);
  font-weight: 700;
  color: var(--key);
}

.explain__list {
  display: grid;
  gap: 0.15rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.explain__list li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: start;
  gap: 0.6rem;
}

.explain__list label {
  padding: 0.6rem 0;
  cursor: pointer;
}

.explain__tick {
  width: 1.25rem;
  height: 1.25rem;
  margin: 0.75rem 0 0;
  accent-color: var(--key-stroke);
}

.explain__list li:has(input:checked) label {
  text-decoration: line-through;
  text-decoration-color: var(--key-stroke);
  color: var(--ink-soft);
}

.explain__note {
  margin: var(--space-2xs) 0 0;
  font-size: var(--step--1);
  color: var(--ink-soft);
}