.learning-button {
  min-height: 46px;
  padding: 12px 19px;
  border: 2px solid var(--ink);
  border-radius: 999px;
  background: transparent;
  color: var(--ink);
  font: 900 .76rem/1 Outfit, Arial, sans-serif;
  letter-spacing: .035em;
  text-transform: uppercase;
  cursor: pointer;
  transition: transform .16s ease, box-shadow .16s ease, background-color .16s ease;
}

.learning-button:hover {
  transform: translateY(-2px);
}

.learning-button:focus-visible,
.quiz-choice:focus-visible,
.code-lab textarea:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 4px;
}

.learning-button--primary {
  background: var(--yellow);
  color: #211d1d;
  box-shadow: 4px 4px 0 var(--ink);
}

.learning-button--dark {
  background: var(--ink);
  color: var(--paper);
}

.learning-button--quiet {
  border-color: var(--line);
}

.recall-quiz {
  --quiz-green: #087443;
  --quiz-red: #b42f3d;
  position: relative;
  margin: 60px 0 24px;
  padding: clamp(24px, 5vw, 44px);
  border: 2px solid var(--ink);
  border-radius: 24px;
  background: var(--paper-raised);
  box-shadow: 8px 8px 0 var(--yellow);
  overflow: hidden;
  transition: background-color .2s ease, border-color .2s ease;
}

.recall-quiz--invitation {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 34px;
  background-image: linear-gradient(118deg, color-mix(in srgb, var(--yellow) 18%, transparent), transparent 58%);
}

.recall-quiz__invite-copy {
  max-width: 650px;
}

.recall-quiz__label,
.code-lab__label {
  margin: 0 0 9px !important;
  color: var(--green);
  font: 900 .7rem/1.25 Outfit, Arial, sans-serif !important;
  letter-spacing: .1em;
  text-transform: uppercase;
}

.recall-quiz h2 {
  margin: 0 0 12px !important;
  font: 700 clamp(2rem, 4vw, 3rem)/.95 Papernotes, Georgia, serif !important;
}

.recall-quiz p {
  max-width: 700px;
}

.recall-quiz__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 12px;
  color: var(--muted);
  font-size: .7rem;
  font-weight: 900;
  letter-spacing: .07em;
  text-transform: uppercase;
}

.quiz-progress {
  height: 7px;
  margin-bottom: 34px;
  border-radius: 999px;
  background: var(--line);
  overflow: hidden;
}

.quiz-progress span {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: var(--green);
  transition: width .25s ease;
}

.quiz-question {
  max-width: 760px;
}

.quiz-key-hint {
  margin: -2px 0 23px !important;
  color: var(--muted);
  font-size: .82rem !important;
}

.quiz-choices {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin: 22px 0;
}

.quiz-choice {
  min-width: 0;
  min-height: 58px;
  padding: 11px 18px 11px 10px;
  border: 2px solid var(--line);
  border-radius: 999px;
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--paper);
  color: var(--ink);
  font: 800 .92rem/1.35 Outfit, Arial, sans-serif;
  text-align: left;
  cursor: pointer;
  transition: border-color .15s ease, transform .15s ease, background-color .15s ease;
}

.quiz-choice:not(:disabled):hover {
  border-color: var(--ink);
  transform: translateY(-2px);
}

.quiz-choice:disabled {
  cursor: default;
  opacity: .58;
}

.quiz-choice__key {
  flex: 0 0 36px;
  width: 36px;
  height: 36px;
  border: 1px solid var(--line);
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: var(--paper-raised);
  font-size: .72rem;
}

.quiz-choice--correct,
.quiz-choice--wrong {
  color: #fff;
  opacity: 1 !important;
}

.quiz-choice--correct {
  border-color: var(--quiz-green);
  background: var(--quiz-green);
}

.quiz-choice--wrong {
  border-color: var(--quiz-red);
  background: var(--quiz-red);
}

.quiz-choice--correct .quiz-choice__key,
.quiz-choice--wrong .quiz-choice__key {
  border-color: currentColor;
  background: transparent;
}

.recall-quiz--correct {
  border-color: var(--quiz-green);
  background: color-mix(in srgb, var(--quiz-green) 12%, var(--paper-raised));
}

.recall-quiz--wrong {
  border-color: var(--quiz-red);
  background: color-mix(in srgb, var(--quiz-red) 11%, var(--paper-raised));
}

.quiz-feedback {
  min-height: 3.4rem;
  margin: 20px 0 !important;
  padding: 15px 18px;
  border-left: 5px solid transparent;
  border-radius: 0 10px 10px 0;
  font-weight: 800;
  line-height: 1.5 !important;
}

.quiz-feedback:empty {
  display: none;
}

.quiz-feedback--correct {
  border-color: var(--quiz-green);
  background: color-mix(in srgb, var(--quiz-green) 10%, var(--paper));
}

.quiz-feedback--wrong {
  border-color: var(--quiz-red);
  background: color-mix(in srgb, var(--quiz-red) 10%, var(--paper));
}

.learning-feedback-flash {
  position: fixed;
  z-index: 9999;
  inset: 0;
  pointer-events: none;
  opacity: 0;
  transition: opacity .12s ease;
}

.learning-feedback-flash.is-visible {
  opacity: 1;
  animation: feedback-fade .6s ease forwards;
}

.learning-feedback-flash--correct {
  background: color-mix(in srgb, #08a65a 24%, transparent);
  box-shadow: inset 0 0 0 12px #08a65a;
}

.learning-feedback-flash--wrong {
  background: color-mix(in srgb, #d72f45 23%, transparent);
  box-shadow: inset 0 0 0 12px #d72f45;
}

@keyframes feedback-fade {
  0%, 35% { opacity: 1; }
  100% { opacity: 0; }
}

.recall-quiz--results {
  display: grid;
  grid-template-columns: 150px minmax(0, 1fr);
  gap: 24px 34px;
  align-items: start;
}

.quiz-score {
  aspect-ratio: 1;
  border: 2px solid var(--ink);
  border-radius: 50%;
  display: grid;
  place-content: center;
  text-align: center;
  background: var(--yellow);
  color: #211d1d;
  transform: rotate(-3deg);
}

.quiz-score strong {
  display: block;
  font: 700 3rem/.85 Papernotes, Georgia, serif;
}

.quiz-score span {
  margin-top: 8px;
  font-size: .68rem;
  font-weight: 900;
  letter-spacing: .07em;
  text-transform: uppercase;
}

.quiz-review,
.quiz-results__actions {
  grid-column: 1 / -1;
}

.quiz-review {
  display: grid;
  gap: 0;
  border-top: 2px solid var(--ink);
}

.quiz-review__item {
  padding: 25px 0 25px 22px;
  border-bottom: 1px solid var(--line);
  border-left: 5px solid var(--quiz-red);
}

.quiz-review__item h3 {
  margin: 0 0 12px !important;
  font-size: 1rem !important;
}

.quiz-review__item p {
  margin: 6px 0 !important;
  font-size: .92rem !important;
}

.quiz-review__explanation {
  color: var(--muted);
}

.quiz-review__link {
  display: inline-block;
  margin-top: 9px;
  color: var(--ink);
  font-size: .75rem;
  font-weight: 900;
  text-underline-offset: 4px;
  text-transform: uppercase;
}

.quiz-results__actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.code-lab {
  margin: 42px 0;
  border: 2px solid #211d1d;
  border-radius: 22px;
  background: #fffdf7;
  color: #211d1d;
  box-shadow: 8px 8px 0 var(--yellow);
  overflow: hidden;
}

.code-lab__intro {
  padding: clamp(24px, 5vw, 40px);
  background: linear-gradient(120deg, #fff1ac, #fffdf7 64%);
}

.code-lab__intro h3 {
  margin: 0 0 10px !important;
  color: #211d1d;
  font: 700 clamp(2rem, 4vw, 3rem)/.95 Papernotes, Georgia, serif !important;
  text-transform: none !important;
  letter-spacing: normal !important;
}

.code-lab__intro > p:not(.code-lab__label) {
  max-width: 690px;
  margin: 0 0 22px !important;
  color: #514a45;
}

.code-lab__workspace {
  background: #181617;
  color: #fffaf0;
}

.code-lab__toolbar {
  min-height: 58px;
  padding: 12px 18px;
  border-bottom: 1px solid #433d3e;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.code-lab__toolbar strong {
  color: #85e5ad;
  font: 800 .82rem/1 ui-monospace, SFMono-Regular, Consolas, monospace;
}

.code-lab__toolbar p {
  margin: 0 !important;
  color: #c9bec1;
  font-size: .7rem !important;
}

.code-lab kbd {
  padding: 3px 6px;
  border: 1px solid #696064;
  border-bottom-width: 2px;
  border-radius: 5px;
  background: #2b2729;
  color: #fffaf0;
  font: 700 .68rem/1 ui-monospace, SFMono-Regular, Consolas, monospace;
}

.code-lab__panes {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  min-height: 430px;
}

.code-lab__editor,
.code-lab__preview {
  min-width: 0;
  display: flex;
  flex-direction: column;
}

.code-lab__editor {
  border-right: 1px solid #433d3e;
}

.code-lab__editor label,
.code-lab__preview > p {
  margin: 0 !important;
  padding: 10px 16px;
  border-bottom: 1px solid #433d3e;
  color: #c9bec1;
  font: 900 .65rem/1 Outfit, Arial, sans-serif !important;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.code-lab textarea {
  flex: 1;
  width: 100%;
  min-height: 380px;
  resize: vertical;
  padding: 22px;
  border: 0;
  border-radius: 0;
  background: #181617;
  color: #fffaf0;
  caret-color: #ffbf00;
  font: 600 .88rem/1.65 ui-monospace, SFMono-Regular, Consolas, monospace;
  tab-size: 2;
}

.code-lab iframe {
  flex: 1;
  width: 100%;
  min-height: 380px;
  border: 0;
  background: #fffaf0;
}

.code-lab__actions {
  min-height: 74px;
  padding: 14px 18px;
  border-top: 1px solid #433d3e;
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.code-lab__actions .learning-button--dark {
  border-color: #fffaf0;
  background: #fffaf0;
  color: #211d1d;
}

.code-lab__actions .learning-button--quiet {
  border-color: #696064;
  color: #fffaf0;
}

.code-lab__status {
  flex: 1 1 280px;
  margin: 0 0 0 8px !important;
  color: #c9bec1;
  font-size: .8rem !important;
  line-height: 1.45 !important;
}

.code-lab__status--success {
  color: #85e5ad;
}

.code-lab__status--try {
  color: #ffc0c8;
}

.code-teacher {
  padding: 25px 24px 30px;
  border-top: 1px solid #433d3e;
  background: #211e20;
}

.code-teacher h4 {
  margin: 0 0 18px !important;
  color: #fffaf0;
  font: 900 .72rem/1 Outfit, Arial, sans-serif !important;
  letter-spacing: .1em;
  text-transform: uppercase;
}

.code-teacher__note {
  display: grid;
  grid-template-columns: minmax(150px, .55fr) minmax(0, 1.45fr);
  gap: 22px;
  padding: 15px 0;
  border-top: 1px solid #433d3e;
}

.code-teacher__note code {
  align-self: start;
  padding: 6px 8px !important;
  border: 1px solid #564e51;
  border-radius: 6px !important;
  background: #181617 !important;
  color: #ffda6b;
  font-size: .78rem !important;
  overflow-wrap: anywhere;
}

.code-teacher__note p {
  margin: 0 !important;
  color: #d6cbce;
  font-size: .85rem !important;
  line-height: 1.55 !important;
}

.code-teacher__note strong {
  color: #85e5ad;
}

@media (max-width: 760px) {
  .recall-quiz--invitation {
    align-items: flex-start;
    flex-direction: column;
  }

  .quiz-choices,
  .recall-quiz--results,
  .code-lab__panes {
    grid-template-columns: 1fr;
  }

  .quiz-score {
    width: 120px;
  }

  .code-lab {
    margin-inline: -10px;
  }

  .code-lab__toolbar {
    align-items: flex-start;
    flex-direction: column;
  }

  .code-lab__editor {
    border-right: 0;
    border-bottom: 1px solid #433d3e;
  }

  .code-teacher__note {
    grid-template-columns: 1fr;
    gap: 9px;
  }

  .code-lab__actions {
    align-items: stretch;
  }

  .code-lab__actions .learning-button {
    flex: 1 1 auto;
  }

  .code-lab__status {
    flex-basis: 100%;
    margin-left: 0 !important;
  }
}

@media (prefers-reduced-motion: reduce) {
  .learning-button,
  .quiz-choice,
  .quiz-progress span,
  .learning-feedback-flash {
    transition: none;
  }

  .learning-feedback-flash.is-visible {
    animation: none;
    opacity: .16;
  }
}