:root {
  --ink: #27234d;
  --ink-soft: #595475;
  --purple: #5b3fd6;
  --purple-dark: #452cb9;
  --purple-pale: #eeeaff;
  --mint: #087d5f;
  --mint-pale: #e4f8f1;
  --coral: #bd3455;
  --coral-pale: #fff0f3;
  --yellow: #ffc94a;
  --gold-pale: #fff0b8;
  --focus: #7a4c00;
  --sky: #dff5ff;
  --white: #ffffff;
  --line: #827a9f;
  --shadow: 0 18px 50px rgba(59, 39, 130, 0.14);
  --radius-large: 28px;
  --radius-medium: 18px;
  --page-gutter: clamp(12px, 3vw, 32px);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  min-height: 100vh;
  min-height: 100svh;
  padding-left: env(safe-area-inset-left, 0px);
  padding-right: env(safe-area-inset-right, 0px);
  display: flex;
  flex-direction: column;
  font-family: "Trebuchet MS", "Segoe UI", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at 8% 18%, rgba(255, 201, 74, 0.4) 0 60px, transparent 61px),
    radial-gradient(circle at 94% 80%, rgba(73, 207, 175, 0.25) 0 90px, transparent 91px),
    linear-gradient(145deg, #f3f0ff 0%, #fbfdff 48%, #e8f9ff 100%);
  background-size: 120% 120%;
  animation: background-drift 18s ease-in-out infinite alternate;
}

button,
a,
input,
select,
textarea {
  font: inherit;
}

button:focus-visible,
a:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
[tabindex="-1"]:focus-visible {
  outline: 4px solid var(--focus);
  outline-offset: 4px;
}

.site-header {
  width: 100%;
  max-width: 1120px;
  margin: 0 auto;
  padding: max(18px, env(safe-area-inset-top, 0px)) var(--page-gutter) 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.brand {
  min-width: 0;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  font-size: clamp(1rem, 3vw, 1.18rem);
  font-weight: 800;
  text-decoration: none;
}

.brand-copy {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  line-height: 1.15;
}

.brand-copy strong {
  font-size: 1.05rem;
}

.brand-copy small {
  margin-top: 3px;
  color: var(--ink-soft);
  font-size: 0.72rem;
  font-weight: 700;
}

.brand__icon {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border-radius: 13px;
  background: var(--purple);
  box-shadow: 0 5px 0 var(--purple-dark);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 9px;
  flex-wrap: wrap;
}

.home-button {
  min-height: 44px;
  padding: 8px 13px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  border: 2px solid var(--line);
  border-radius: 999px;
  color: var(--purple-dark);
  background: rgba(255, 255, 255, 0.88);
  cursor: pointer;
  font-size: 0.88rem;
  font-weight: 900;
  transition: transform 150ms ease, background-color 150ms ease;
}

.home-button:hover {
  background: var(--purple-pale);
  transform: translateY(-2px);
}

.sound-button {
  flex: 0 0 44px;
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border: 2px solid var(--line);
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.88);
  cursor: pointer;
  font-size: 1rem;
  transition: transform 150ms ease, background-color 150ms ease;
}

.sound-button:hover {
  background: var(--purple-pale);
  transform: rotate(-8deg) scale(1.05);
}

.sound-button[aria-pressed="false"] {
  background: #f0eef5;
  filter: grayscale(1);
}

.sound-button--ring {
  animation: sound-ring 420ms ease;
}

.score-chip {
  min-height: 44px;
  padding: 10px 14px;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  border: 2px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.88);
  font-size: 0.92rem;
  font-weight: 800;
}

.score-chip--pop {
  animation: score-pop 380ms cubic-bezier(0.2, 0.9, 0.3, 1.3);
}

.game-shell {
  width: min(100% - 2 * var(--page-gutter), 1080px);
  margin: auto;
  padding: 24px 0 40px;
}

.game-card {
  min-width: 0;
  border: 2px solid rgba(91, 63, 214, 0.12);
  border-radius: var(--radius-large);
  background: rgba(255, 255, 255, 0.96);
  box-shadow: var(--shadow);
}

.start-screen,
.results-screen {
  padding: clamp(28px, 7vw, 58px);
  text-align: center;
}

.hub-screen {
  padding: clamp(24px, 5vw, 48px);
  text-align: left;
}

.hub-intro {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.hub-intro h1 {
  margin: 0;
}

.hub-intro > div {
  min-width: 0;
}

.hub-intro .start-screen__intro {
  margin: 12px 0 0;
}

.hub-intro__art {
  flex: 0 0 auto;
  width: 108px;
  height: 108px;
  display: grid;
  place-items: center;
  border-radius: 30px;
  background: var(--sky);
  box-shadow: 0 7px 0 rgba(91, 63, 214, 0.14);
  font-size: 4.7rem;
  animation: friendly-float 3.2s ease-in-out infinite;
}

.mode-picker {
  min-width: 0;
  margin: 30px 0 24px;
  padding: 0;
  border: 0;
}

.mode-picker legend {
  margin-bottom: 11px;
  font-weight: 900;
}

.mode-options {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.mode-option {
  min-width: 0;
  position: relative;
  min-height: 76px;
  padding: 13px 16px;
  display: grid;
  grid-template-columns: 38px minmax(0, 1fr);
  align-items: center;
  gap: 10px;
  border: 2px solid var(--line);
  border-radius: var(--radius-medium);
  background: var(--white);
  cursor: pointer;
  transition: border-color 160ms ease, background-color 160ms ease, transform 160ms ease;
}

.mode-option:hover {
  border-color: var(--purple);
  transform: translateY(-2px);
}

.mode-option:has(input:checked) {
  border-color: var(--purple);
  background: var(--purple-pale);
  box-shadow: 0 4px 0 rgba(69, 44, 185, 0.2);
}

.mode-option:has(input:checked) > span:first-of-type {
  animation: choice-bounce 440ms cubic-bezier(0.2, 0.9, 0.3, 1.25);
}

.mode-option input {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
}

.mode-option:has(input:focus-visible) {
  outline: 4px solid var(--focus);
  outline-offset: 3px;
}

.mode-option > span:first-of-type {
  font-size: 1.6rem;
}

.mode-option > span:last-child {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.mode-option strong {
  font-size: 1rem;
}

.mode-option small {
  color: var(--ink-soft);
  font-size: 0.78rem;
  font-weight: 700;
}

.unit-list {
  display: grid;
  gap: 11px;
  list-style: none;
}

.unit-card {
  width: 100%;
  min-height: 88px;
  padding: 13px 16px;
  display: grid;
  grid-template-columns: 34px 48px minmax(0, 1fr) auto 24px;
  align-items: center;
  gap: 12px;
  border: 2px solid var(--line);
  border-radius: var(--radius-medium);
  color: var(--ink);
  background: var(--white);
  cursor: pointer;
  text-align: left;
  transition: border-color 160ms ease, background-color 160ms ease, transform 160ms ease, box-shadow 160ms ease;
}

.unit-card:not(:disabled):hover {
  border-color: var(--purple);
  background: #faf9ff;
  box-shadow: 0 8px 20px rgba(59, 39, 130, 0.1);
  transform: translateX(4px);
}

.unit-card:not(:disabled):active {
  transform: translateX(4px) scale(0.99);
}

.unit-card--current {
  border-color: var(--purple);
  background: linear-gradient(90deg, var(--purple-pale), var(--white) 68%);
}

.unit-card:disabled {
  cursor: not-allowed;
  background: #f8f7fb;
}

.unit-card:disabled .unit-card__content,
.unit-card:disabled .unit-card__icon,
.unit-card:disabled .unit-card__number {
  opacity: 0.62;
}

.unit-card__number {
  width: 30px;
  height: 30px;
  display: grid;
  place-items: center;
  border-radius: 9px;
  color: var(--purple-dark);
  background: var(--purple-pale);
  font-size: 0.84rem;
  font-weight: 900;
}

.unit-card__icon {
  width: 46px;
  height: 46px;
  display: grid;
  place-items: center;
  border-radius: 14px;
  background: var(--sky);
  font-size: 1.55rem;
}

.unit-card__content {
  display: flex;
  flex-direction: column;
  gap: 5px;
  min-width: 0;
}

.unit-card__topline {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}

.unit-card__content strong {
  font-size: 1rem;
}

.unit-card__question {
  color: var(--ink-soft);
  font-size: 0.86rem;
  line-height: 1.35;
  overflow-wrap: anywhere;
}

.current-badge,
.unit-card__status {
  max-width: 100%;
  width: fit-content;
  padding: 6px 10px;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 900;
  overflow-wrap: anywhere;
}

.current-badge {
  color: var(--purple-dark);
  background: var(--white);
}

.unit-card__status {
  color: #075d47;
  background: var(--mint-pale);
}

.unit-card__status--soon {
  color: var(--ink-soft);
  background: #ebe9f0;
}

.unit-card__arrow {
  color: var(--purple);
  font-size: 1.3rem;
  font-weight: 900;
}

.hero-art {
  position: relative;
  width: 150px;
  height: 126px;
  margin: 0 auto 12px;
  display: grid;
  place-items: center;
}

.hero-art::before {
  position: absolute;
  inset: 7px 12px 0;
  border-radius: 50%;
  background: var(--sky);
  content: "";
}

.hero-art__emoji {
  position: relative;
  font-size: 5.2rem;
}

.microbe {
  position: absolute;
  z-index: 1;
  width: 25px;
  height: 25px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  color: var(--white);
  font-size: 0.65rem;
  box-shadow: 0 3px 0 rgba(39, 35, 77, 0.2);
}

.microbe--one {
  top: 4px;
  right: 10px;
  background: var(--coral);
}

.microbe--two {
  bottom: 8px;
  left: 3px;
  background: var(--purple);
}

.microbe--three {
  top: 20px;
  left: 9px;
  background: var(--mint);
}

.eyebrow {
  margin-bottom: 10px;
  color: var(--purple);
  font-size: 0.82rem;
  font-weight: 900;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

h1,
h2 {
  line-height: 1.16;
  text-wrap: balance;
}

h1 {
  max-width: 600px;
  margin: 0 auto;
  font-size: clamp(2rem, 7vw, 3.2rem);
}

.start-screen__intro {
  max-width: 590px;
  margin: 18px auto 0;
  color: var(--ink-soft);
  font-size: clamp(1rem, 3vw, 1.12rem);
  line-height: 1.65;
}

.difficulty-picker {
  max-width: 690px;
  margin: 28px auto 0;
  border: 0;
}

.difficulty-picker legend {
  width: 100%;
  margin-bottom: 13px;
  font-size: 1rem;
  font-weight: 900;
  text-align: center;
}

.difficulty-options {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 11px;
}

.difficulty-card {
  position: relative;
  min-height: 150px;
  padding: 17px 12px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  border: 2px solid var(--line);
  border-radius: var(--radius-medium);
  background: var(--white);
  cursor: pointer;
  transition: border-color 160ms ease, background-color 160ms ease, transform 160ms ease;
}

.difficulty-card:hover {
  border-color: var(--purple);
  transform: translateY(-3px);
}

.difficulty-card:has(input:checked) {
  border-color: var(--purple);
  background: var(--purple-pale);
  box-shadow: 0 5px 0 rgba(69, 44, 185, 0.2);
}

.difficulty-card input {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

.difficulty-card:has(input:focus-visible) {
  outline: 4px solid var(--focus);
  outline-offset: 3px;
}

.difficulty-card__icon {
  font-size: 2rem;
}

.difficulty-card__name {
  color: var(--ink);
  font-size: 0.92rem;
  font-weight: 900;
}

.difficulty-card__detail {
  color: var(--ink-soft);
  font-size: 0.75rem;
  line-height: 1.35;
}

.mission-details {
  margin: 20px auto 28px;
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 10px;
}

.mission-details span {
  padding: 9px 13px;
  border-radius: 999px;
  background: var(--purple-pale);
  color: var(--purple-dark);
  font-size: 0.88rem;
}

.button {
  min-height: 48px;
  padding: 13px 22px;
  border: 2px solid transparent;
  border-radius: 14px;
  cursor: pointer;
  font-weight: 900;
  transition: transform 160ms ease, box-shadow 160ms ease, background-color 160ms ease;
}

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

.button--primary {
  color: var(--white);
  background: var(--purple);
  box-shadow: 0 6px 0 var(--purple-dark);
}

.button--primary:hover {
  background: var(--purple-dark);
}

.button--primary:active {
  transform: translateY(4px);
  box-shadow: 0 2px 0 var(--purple-dark);
}

.button--secondary {
  border-color: var(--purple);
  color: var(--purple-dark);
  background: var(--white);
}

.button--secondary:hover {
  background: var(--purple-pale);
}

.start-screen__tip {
  margin-top: 22px;
  color: var(--ink-soft);
  font-size: 0.88rem;
}

.quiz-topline {
  margin-bottom: 12px;
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.quiz-screen {
  display: grid;
  grid-template-areas:
    "top visual"
    "progress visual"
    "question visual";
  grid-template-columns: minmax(0, 1fr) 280px;
  gap: 12px 24px;
  align-items: start;
}

.quiz-topline {
  grid-area: top;
}

.quiz-screen .progress-track {
  grid-area: progress;
}

.question-card {
  grid-area: question;
}

.start-screen,
.quiz-screen,
.results-screen {
  scroll-margin-top: 16px;
}

.quiz-topline > div,
.learning-panel,
.answer-list,
.matching-column,
.feedback > div,
.speech-status {
  min-width: 0;
}

h1,
h2,
.level-label,
.unit-card__content,
.answer-button__text,
.match-button,
.feedback p,
.speech-status {
  overflow-wrap: anywhere;
}

.learning-panel {
  position: static;
  grid-area: visual;
  align-self: center;
  padding: 22px;
  border: 2px solid rgba(91, 63, 214, 0.15);
  border-radius: var(--radius-large);
  background: rgba(255, 255, 255, 0.92);
  box-shadow: 0 12px 34px rgba(59, 39, 130, 0.11);
  text-align: center;
}

.learning-panel__eyebrow {
  color: var(--coral);
  font-size: 0.75rem;
  font-weight: 900;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.learning-panel h2 {
  margin-top: 4px;
  font-size: 1.35rem;
}

.learning-panel figure {
  margin-top: 16px;
}

.learning-panel__image {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 16px;
  background: var(--purple-pale);
}

.learning-panel__unit-icon {
  min-height: 220px;
  display: grid;
  place-items: center;
  border-radius: 16px;
  background:
    radial-gradient(circle at 22% 22%, rgba(255, 201, 74, 0.45) 0 34px, transparent 35px),
    linear-gradient(145deg, var(--sky), var(--purple-pale));
  font-size: 6rem;
  animation: friendly-float 3.4s ease-in-out infinite;
}

.learning-panel figcaption {
  margin-top: 14px;
  color: var(--ink-soft);
  font-size: 0.9rem;
  font-weight: 700;
  line-height: 1.45;
}

.learning-panel--change .learning-panel__image,
.learning-panel--change .learning-panel__unit-icon {
  animation: picture-pop 380ms cubic-bezier(0.2, 0.9, 0.3, 1.15);
}

.level-label {
  color: var(--purple);
  font-size: 0.8rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.progress-text {
  margin-top: 3px;
  color: var(--ink-soft);
  font-size: 0.93rem;
  font-weight: 700;
}

.streak-badge {
  padding: 8px 12px;
  border-radius: 999px;
  color: #6c4800;
  background: var(--gold-pale);
  font-size: 0.85rem;
  font-weight: 900;
  animation: streak-bounce 600ms cubic-bezier(0.2, 0.9, 0.3, 1.25);
}

.progress-track {
  height: 12px;
  margin-bottom: 20px;
  overflow: hidden;
  border: 2px solid var(--line);
  border-radius: 999px;
  background: var(--white);
}

.progress-track__bar {
  position: relative;
  display: block;
  width: 0;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--purple), #927cff);
  transition: width 300ms ease;
}

.progress-track__bar::after {
  position: absolute;
  top: 50%;
  right: 1px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--white);
  box-shadow: 0 0 8px 2px var(--white);
  content: "";
  transform: translateY(-50%);
}

.question-card {
  padding: clamp(24px, 6vw, 42px);
}

.question-card--enter {
  animation: card-arrive 360ms cubic-bezier(0.2, 0.9, 0.3, 1.15);
}

.question-number {
  margin-bottom: 9px;
  color: var(--coral);
  font-size: 0.82rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.question-card h2 {
  margin-bottom: 13px;
  font-size: clamp(1.4rem, 5vw, 2rem);
}

.speech-button {
  max-width: 100%;
  min-height: 44px;
  padding: 9px 13px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: 2px solid var(--purple);
  border-radius: 999px;
  color: var(--purple-dark);
  background: var(--white);
  cursor: pointer;
  font-size: 0.84rem;
  font-weight: 900;
  transition: transform 150ms ease, background-color 150ms ease, box-shadow 150ms ease;
}

.speech-button:hover {
  background: var(--purple-pale);
  box-shadow: 0 5px 14px rgba(69, 44, 185, 0.13);
  transform: translateY(-2px);
}

.speech-button:disabled {
  cursor: wait;
  opacity: 0.78;
}

.speech-button--read {
  margin-bottom: 22px;
}

.speech-button__icon {
  font-size: 1.05rem;
}

.speech-button__badge {
  padding: 3px 7px;
  border-radius: 999px;
  color: #075d47;
  background: var(--mint-pale);
  font-size: 0.62rem;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.speech-button--speaking .speech-button__icon,
.speech-button--listening .speech-button__icon {
  animation: speech-pulse 850ms ease-in-out infinite;
}

.spoken-answer {
  margin-top: 18px;
  padding-top: 16px;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px 14px;
  border-top: 2px dashed var(--line);
}

.speech-button--answer {
  border-color: var(--mint);
  color: #075d47;
}

.speech-button--answer:hover {
  background: var(--mint-pale);
}

.speech-status {
  flex: 1 1 240px;
  min-height: 21px;
  color: var(--ink-soft);
  font-size: 0.84rem;
  font-weight: 700;
  line-height: 1.4;
}

.answer-list {
  display: grid;
  gap: 12px;
}

.activity-label {
  width: fit-content;
  margin-bottom: 12px;
  padding: 6px 10px;
  border-radius: 999px;
  color: var(--purple-dark);
  background: var(--purple-pale);
  font-size: 0.75rem;
  font-weight: 900;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.answer-button {
  position: relative;
  overflow: hidden;
  width: 100%;
  min-height: 58px;
  padding: 13px 16px;
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr) 28px;
  align-items: center;
  gap: 11px;
  border: 2px solid var(--line);
  border-radius: var(--radius-medium);
  color: var(--ink);
  background: var(--white);
  cursor: pointer;
  text-align: left;
  transition: border-color 150ms ease, background-color 150ms ease, transform 150ms ease;
}

.answer-button:hover:not(:disabled) {
  border-color: var(--purple);
  background: var(--purple-pale);
  transform: translateX(3px);
}

.answer-button:disabled {
  cursor: default;
  opacity: 1;
}

.answer-button__letter {
  width: 32px;
  height: 32px;
  display: grid;
  place-items: center;
  border-radius: 10px;
  color: var(--purple-dark);
  background: var(--purple-pale);
  font-weight: 900;
}

.answer-button__text {
  line-height: 1.4;
}

.answer-button__mark {
  font-size: 1.2rem;
  font-weight: 900;
  text-align: center;
}

.answer-button--correct {
  border-color: var(--mint);
  background: var(--mint-pale);
  animation: correct-pop 420ms cubic-bezier(0.2, 0.9, 0.3, 1.25);
}

.answer-button--correct::after {
  position: absolute;
  inset: -60% auto -60% -35%;
  width: 24%;
  background: rgba(255, 255, 255, 0.7);
  content: "";
  transform: rotate(18deg);
  animation: correct-shine 650ms ease-out;
}

.answer-button--correct .answer-button__letter {
  color: var(--white);
  background: var(--mint);
}

.answer-button--incorrect {
  border-color: var(--coral);
  background: var(--coral-pale);
  animation: try-again 360ms ease;
}

.answer-button--incorrect .answer-button__letter {
  color: var(--white);
  background: var(--coral);
}

.fill-form {
  display: grid;
  gap: 12px;
}

.fill-form label {
  font-weight: 900;
}

.fill-form__hint {
  color: var(--ink-soft);
  font-size: 0.9rem;
}

.fill-form input {
  min-width: 0;
  width: 100%;
  min-height: 52px;
  padding: 12px 14px;
  border: 2px solid var(--line);
  border-radius: 13px;
  color: var(--ink);
  background: var(--white);
  font: inherit;
  font-size: 1rem;
}

.fill-form input:focus {
  border-color: var(--purple);
  outline: 4px solid var(--focus);
  outline-offset: 3px;
}

.fill-form input[aria-invalid="true"] {
  border-color: var(--coral);
  background: var(--coral-pale);
}

.fill-form .button {
  justify-self: start;
}

.matching-instructions {
  color: var(--ink-soft);
  font-size: 0.9rem;
  line-height: 1.45;
}

.matching-game {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr);
  gap: 10px;
}

.matching-column {
  display: grid;
  align-content: start;
  gap: 9px;
}

.match-button {
  min-height: 52px;
  padding: 10px;
  border: 2px solid var(--line);
  border-radius: 13px;
  color: var(--ink);
  background: var(--white);
  cursor: pointer;
  font-size: 0.86rem;
  font-weight: 800;
  line-height: 1.3;
  transition: transform 150ms ease, border-color 150ms ease, background-color 150ms ease;
}

.match-button:hover:not(:disabled) {
  border-color: var(--purple);
  transform: translateY(-2px);
}

.match-button--selected {
  border-color: var(--purple);
  background: var(--purple-pale);
  box-shadow: 0 0 0 3px rgba(91, 63, 214, 0.14);
}

.match-button--matched {
  border-color: var(--mint);
  color: #075d47;
  background: var(--mint-pale);
}

.match-button--try-again {
  border-color: var(--coral);
  background: var(--coral-pale);
  animation: try-again 360ms ease;
}

.matching-status {
  min-height: 24px;
  color: var(--purple-dark);
  font-size: 0.9rem;
  font-weight: 900;
}

.flashcard {
  min-height: 220px;
  padding: 24px;
  display: grid;
  place-items: center;
  border: 3px solid var(--purple);
  border-radius: 22px;
  background:
    radial-gradient(circle at 15% 20%, rgba(255, 201, 74, 0.28) 0 26px, transparent 27px),
    var(--purple-pale);
  text-align: center;
}

.flashcard__side-label {
  color: var(--purple);
  font-size: 0.75rem;
  font-weight: 900;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.flashcard__content {
  max-width: 500px;
  font-size: clamp(1.1rem, 4vw, 1.4rem);
  font-weight: 900;
  line-height: 1.45;
}

.flashcard--revealed {
  border-color: var(--mint);
  background: var(--mint-pale);
  animation: flashcard-flip 420ms ease;
}

.flashcard-actions {
  margin-top: 14px;
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 10px;
}

.feedback {
  margin-top: 20px;
  padding: 17px;
  display: flex;
  align-items: flex-start;
  gap: 13px;
  border-radius: var(--radius-medium);
  background: var(--mint-pale);
}

.feedback:not([hidden]) {
  animation: feedback-arrive 300ms ease-out;
}

.feedback--incorrect {
  background: var(--coral-pale);
}

.feedback__icon {
  flex: 0 0 auto;
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  color: var(--white);
  background: var(--mint);
  font-weight: 900;
}

.feedback:not([hidden]) .feedback__icon {
  animation: feedback-icon-pop 420ms cubic-bezier(0.2, 0.9, 0.3, 1.3);
}
.feedback--incorrect .feedback__icon {
  background: var(--coral);
}

.feedback h3 {
  margin-bottom: 4px;
  font-size: 1rem;
}

.feedback p {
  color: var(--ink-soft);
  font-size: 0.95rem;
  line-height: 1.5;
}

.question-actions {
  display: flex;
  justify-content: flex-end;
}

.question-actions .button {
  margin-top: 20px;
}

.results-screen {
  position: relative;
  overflow: hidden;
}

.results-screen > *:not(.celebration) {
  position: relative;
  z-index: 1;
}

.results-icon {
  width: 94px;
  height: 94px;
  margin: 0 auto 18px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--gold-pale);
  font-size: 3.4rem;
}

.results-screen:not([hidden]) .results-icon {
  animation: trophy-bounce 700ms cubic-bezier(0.2, 0.9, 0.3, 1.25);
}

.celebration {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.confetti {
  position: absolute;
  top: -18px;
  width: 10px;
  height: 18px;
  border-radius: 3px;
  background: var(--purple);
  opacity: 0;
}

.results-screen:not([hidden]) .confetti {
  animation: confetti-fall 1.5s ease-in forwards;
}

.confetti--1 {
  left: 8%;
  background: var(--coral);
  animation-delay: 50ms !important;
}

.confetti--2 {
  left: 18%;
  background: var(--yellow);
  animation-delay: 350ms !important;
}

.confetti--3 {
  left: 28%;
  background: var(--mint);
  animation-delay: 180ms !important;
}

.confetti--4 {
  left: 39%;
  animation-delay: 480ms !important;
}

.confetti--5 {
  left: 49%;
  background: var(--coral);
  animation-delay: 250ms !important;
}

.confetti--6 {
  left: 59%;
  background: var(--yellow);
  animation-delay: 80ms !important;
}

.confetti--7 {
  left: 69%;
  background: var(--mint);
  animation-delay: 420ms !important;
}

.confetti--8 {
  left: 78%;
  animation-delay: 210ms !important;
}

.confetti--9 {
  left: 87%;
  background: var(--coral);
  animation-delay: 520ms !important;
}

.confetti--10 {
  left: 94%;
  background: var(--yellow);
  animation-delay: 300ms !important;
}

.results-screen h2 {
  font-size: clamp(1.8rem, 6vw, 2.7rem);
}

.results-message {
  max-width: 550px;
  margin: 12px auto 0;
  color: var(--ink-soft);
  line-height: 1.55;
}

.score-result {
  margin: 22px 0;
  color: var(--purple);
  font-size: clamp(2.8rem, 10vw, 4.6rem);
  font-weight: 900;
  line-height: 1;
}

.score-result span:last-child {
  color: var(--ink-soft);
  font-size: 0.45em;
}

.results-summary {
  max-width: 400px;
  margin: 0 auto 26px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.results-summary div {
  padding: 13px;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 8px;
  border-radius: 14px;
  background: var(--mint-pale);
  font-size: 0.9rem;
}

.results-summary div:last-child {
  background: var(--purple-pale);
}

.results-summary__icon {
  color: var(--mint);
  font-size: 1.2rem;
  font-weight: 900;
}

.results-summary__icon--review {
  color: var(--purple);
}

.results-actions {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 13px;
}

.site-footer {
  padding: 12px 20px max(24px, env(safe-area-inset-bottom, 0px));
  color: var(--ink-soft);
  font-size: 0.82rem;
  font-weight: 700;
  text-align: center;
}

@keyframes background-drift {
  from {
    background-position: 0% 0%;
  }
  to {
    background-position: 70% 40%;
  }
}

@keyframes friendly-float {
  0%,
  100% {
    transform: translateY(0) rotate(-1deg);
  }
  50% {
    transform: translateY(-7px) rotate(1deg);
  }
}

@keyframes choice-bounce {
  0%,
  100% {
    transform: scale(1);
  }
  55% {
    transform: scale(1.22) rotate(-5deg);
  }
}

@keyframes sound-ring {
  0%,
  100% {
    transform: rotate(0) scale(1);
  }
  35% {
    transform: rotate(-13deg) scale(1.12);
  }
  70% {
    transform: rotate(11deg) scale(1.08);
  }
}

@keyframes score-pop {
  0%,
  100% {
    transform: scale(1);
  }
  55% {
    transform: scale(1.12);
    background: var(--gold-pale);
  }
}

@keyframes streak-bounce {
  0% {
    opacity: 0;
    transform: translateY(6px) scale(0.8);
  }
  100% {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

@keyframes speech-pulse {
  0%,
  100% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.24);
  }
}

@keyframes correct-shine {
  from {
    left: -35%;
  }
  to {
    left: 120%;
  }
}

@keyframes feedback-icon-pop {
  0% {
    transform: scale(0.5) rotate(-12deg);
  }
  70% {
    transform: scale(1.14) rotate(4deg);
  }
  100% {
    transform: scale(1) rotate(0);
  }
}

@keyframes card-arrive {
  from {
    opacity: 0;
    transform: translateY(14px) scale(0.985);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

@keyframes picture-pop {
  from {
    opacity: 0;
    transform: scale(0.94) rotate(-1deg);
  }
  to {
    opacity: 1;
    transform: scale(1) rotate(0);
  }
}

@keyframes correct-pop {
  0%,
  100% {
    transform: scale(1);
  }
  55% {
    transform: scale(1.025);
  }
}

@keyframes try-again {
  0%,
  100% {
    transform: translateX(0);
  }
  25% {
    transform: translateX(-6px);
  }
  50% {
    transform: translateX(6px);
  }
  75% {
    transform: translateX(-3px);
  }
}

@keyframes feedback-arrive {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes flashcard-flip {
  0% {
    opacity: 0;
    transform: rotateY(90deg);
  }
  100% {
    opacity: 1;
    transform: rotateY(0);
  }
}

@keyframes trophy-bounce {
  0% {
    opacity: 0;
    transform: translateY(-20px) scale(0.5) rotate(-8deg);
  }
  60% {
    transform: translateY(5px) scale(1.1) rotate(5deg);
  }
  100% {
    opacity: 1;
    transform: translateY(0) scale(1) rotate(0);
  }
}

@keyframes confetti-fall {
  0% {
    opacity: 0;
    transform: translateY(-15px) rotate(0);
  }
  15% {
    opacity: 1;
  }
  100% {
    opacity: 0;
    transform: translateY(460px) rotate(540deg);
  }
}

[hidden] {
  display: none !important;
}

@media (max-width: 520px) {
  .site-header {
    gap: 12px;
  }

  .brand {
    flex: 1 1 100%;
  }

  .brand-copy strong {
    font-size: 1.1rem;
  }

  .brand-copy small {
    font-size: 0.875rem;
  }

  .brand__icon {
    width: 44px;
    height: 44px;
  }

  .score-chip {
    margin-left: auto;
    font-size: 0.9rem;
  }

  .header-actions {
    width: 100%;
    gap: 8px;
  }

  .game-shell {
    padding-top: 12px;
  }

  .hub-screen {
    padding: 22px 16px;
  }

  .hub-intro__art {
    display: none;
  }

  .hub-intro h1 {
    font-size: clamp(1.75rem, 7vw, 2.25rem);
  }

  .mode-options {
    grid-template-columns: 1fr;
  }

  .unit-card {
    min-height: 106px;
    padding: 12px;
    grid-template-columns: 40px minmax(0, 1fr);
    gap: 9px;
  }

  .unit-card__icon {
    width: 40px;
    height: 40px;
  }

  .unit-card__number {
    grid-column: 1;
    grid-row: 1;
    z-index: 1;
    align-self: end;
    justify-self: end;
    width: 22px;
    height: 22px;
    transform: translate(4px, 5px);
  }

  .unit-card__icon {
    grid-column: 1;
    grid-row: 1;
    align-self: start;
  }

  .unit-card__content {
    grid-column: 2;
    grid-row: 1;
  }

  .unit-card__status {
    grid-column: 2;
    justify-self: start;
  }

  .unit-card__arrow {
    display: none;
  }

  .unit-card__question {
    white-space: normal;
  }

  .current-badge {
    padding: 4px 7px;
  }

  .start-screen,
  .results-screen,
  .question-card {
    border-radius: 22px;
  }

  .answer-button {
    grid-template-columns: 32px minmax(0, 1fr) 22px;
    padding-inline: 12px;
  }

  .speech-button--read,
  .speech-button--answer {
    width: 100%;
  }

  .speech-status {
    text-align: center;
  }

  .mode-option small,
  .unit-card__question,
  .unit-card__status,
  .match-button,
  .speech-status {
    font-size: 0.9375rem;
    line-height: 1.5;
  }

  .flashcard {
    padding: 20px 14px;
  }

  .flashcard-actions .button,
  .fill-form .button,
  .question-actions .button {
    width: 100%;
  }

  .results-summary {
    grid-template-columns: 1fr;
  }

  .difficulty-options {
    grid-template-columns: 1fr;
  }

  .difficulty-card {
    min-height: 88px;
    display: grid;
    grid-template-columns: 44px 1fr;
    grid-template-rows: auto auto;
    text-align: left;
  }

  .difficulty-card__icon {
    grid-row: 1 / 3;
  }

  .matching-game {
    grid-template-columns: 1fr;
  }

  .results-actions,
  .results-actions .button {
    width: 100%;
  }
}

@media (max-width: 1024px) {
  .quiz-screen {
    grid-template-areas:
      "top"
      "progress"
      "question"
      "visual";
    grid-template-columns: minmax(0, 1fr);
  }

  .learning-panel {
    position: static;
    padding: 16px;
    display: grid;
    grid-template-columns: 112px minmax(0, 1fr);
    grid-template-rows: auto auto 1fr;
    column-gap: 16px;
    text-align: left;
  }

  .learning-panel__eyebrow,
  .learning-panel h2 {
    grid-column: 2;
  }

  .learning-panel figure {
    margin-top: 0;
    display: contents;
  }

  .learning-panel__image {
    grid-column: 1;
    grid-row: 1 / 4;
    align-self: center;
  }

  .learning-panel__unit-icon {
    min-height: 104px;
    grid-column: 1;
    grid-row: 1 / 4;
    align-self: center;
    font-size: 3.6rem;
  }

  .learning-panel figcaption {
    grid-column: 2;
    margin-top: 7px;
  }
}

@media (max-width: 420px) {
  .learning-panel {
    grid-template-columns: 88px minmax(0, 1fr);
    column-gap: 12px;
  }

  .learning-panel h2 {
    font-size: 1.1rem;
  }

  .learning-panel figcaption {
    font-size: 0.9375rem;
  }

  .question-card {
    padding: 20px 14px;
  }

  .answer-button {
    gap: 8px;
    font-size: 1rem;
  }
}

@media (hover: none) and (pointer: coarse) {
  button,
  .mode-option,
  .difficulty-card {
    touch-action: manipulation;
  }

  button:hover,
  .unit-card:not(:disabled):hover,
  .answer-button:hover:not(:disabled),
  .match-button:hover:not(:disabled),
  .mode-option:hover,
  .difficulty-card:hover {
    transform: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}