:root {
  color-scheme: light;
  --bg: #f8faf6;
  --paper: #ffffff;
  --ink: #24342f;
  --muted: #65736d;
  --line: #dce6df;
  --leaf: #4f8f7b;
  --leaf-dark: #2f6e61;
  --blue: #477fae;
  --coral: #db7665;
  --honey: #d99a38;
  --plum: #80679f;
  --soft-green: #e6f2ec;
  --soft-blue: #e6f0f8;
  --soft-coral: #f9ebe7;
  --shadow: 0 18px 50px rgba(35, 52, 47, 0.12);
}

* {
  box-sizing: border-box;
}

html,
body {
  min-height: 100%;
}

body {
  margin: 0;
  background:
    linear-gradient(180deg, rgba(230, 242, 236, 0.86), rgba(248, 250, 246, 0.95) 42%),
    var(--bg);
  color: var(--ink);
  font-family: Nunito, ui-rounded, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  letter-spacing: 0;
}

button {
  font: inherit;
}

.app-shell {
  width: min(1120px, calc(100% - 28px));
  min-height: calc(100dvh - 28px);
  margin: 14px auto;
  display: grid;
  grid-template-rows: auto 1fr auto;
  gap: 12px;
}

.topbar,
.status-bar,
.stage {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.92);
  box-shadow: var(--shadow);
}

.topbar {
  min-height: 82px;
  border-radius: 8px;
  padding: 16px 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
}

.eyebrow {
  margin: 0 0 2px;
  color: var(--leaf-dark);
  font-size: 0.78rem;
  font-weight: 900;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  font-size: 1.55rem;
  line-height: 1.1;
}

.icon-button,
.round-button {
  width: 44px;
  height: 44px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--paper);
  color: var(--ink);
  display: inline-grid;
  place-items: center;
  cursor: pointer;
}

.round-button:disabled {
  cursor: default;
  opacity: 0.42;
}

.button-icon {
  width: 22px;
  height: 22px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 2;
}

.icon-button:focus-visible,
.round-button:focus-visible,
.mode-tab:focus-visible,
.lesson-type-chip:focus-visible,
.chip:focus-visible,
.choice-card:focus-visible,
.match-card:focus-visible,
.mission-dot:focus-visible {
  outline: 3px solid rgba(71, 127, 174, 0.35);
  outline-offset: 2px;
}

.stage {
  border-radius: 8px;
  padding: 14px;
  display: grid;
  grid-template-rows: auto auto 1fr;
  gap: 12px;
}

.mode-tabs,
.lesson-type-strip,
.age-band-strip,
.level-strip,
.category-strip,
.foundation-group-strip {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 2px;
  scrollbar-width: thin;
}

.mode-tab,
.lesson-type-chip,
.age-chip,
.level-chip,
.chip {
  min-height: 42px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--paper);
  color: var(--ink);
  font-weight: 900;
  cursor: pointer;
  white-space: nowrap;
}

.mode-tab {
  padding: 0 16px;
}

.lesson-type-chip {
  min-width: 118px;
  padding: 0 16px;
}

.age-chip {
  padding: 0 14px;
  font-size: 0.9rem;
}

.level-chip {
  padding: 0 14px;
  font-size: 0.9rem;
}

.chip {
  padding: 0 12px;
  font-size: 0.92rem;
}

.mode-tab.active,
.lesson-type-chip.active,
.age-chip.active,
.level-chip.active,
.chip.active {
  border-color: transparent;
  background: var(--leaf);
  color: #fff;
}

.mission-panel,
.word-panel,
.listen-panel,
.match-panel {
  min-height: 420px;
}

.word-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(280px, 0.9fr);
  gap: 14px;
  align-items: start;
}

.hero-card,
.mission-card,
.side-list,
.quiz-card,
.match-card,
.choice-card {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--paper);
}

.mission-card {
  min-height: 420px;
  padding: 18px;
  display: grid;
  grid-template-rows: auto 1fr auto;
  gap: 14px;
}

.mission-card.complete {
  grid-template-rows: auto 1fr;
}

.mission-top {
  display: flex;
  align-items: start;
  justify-content: space-between;
  gap: 14px;
}

.mission-title {
  margin: 4px 0 0;
  font-size: 1.55rem;
  line-height: 1.1;
}

.mission-dots {
  display: flex;
  flex-wrap: wrap;
  justify-content: end;
  gap: 6px;
}

.mission-dot {
  width: 34px;
  height: 34px;
  border: 1px solid var(--line);
  border-radius: 8px;
  display: inline-grid;
  place-items: center;
  color: var(--muted);
  font-weight: 950;
  background: var(--paper);
}

.mission-dot.active {
  border-color: var(--leaf);
  color: #fff;
  background: var(--leaf);
}

.mission-dot.done {
  border-color: var(--leaf);
  color: var(--leaf-dark);
  background: var(--soft-green);
}

.mission-body {
  display: grid;
  gap: 14px;
}

.mission-word {
  min-height: 300px;
  display: grid;
  grid-template-columns: minmax(220px, 0.85fr) minmax(220px, 1fr);
  align-items: center;
  gap: 18px;
}

.mission-image {
  width: 100%;
  min-height: 300px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background-color: #f7fbf8;
  background-position: center;
  background-repeat: no-repeat;
  background-size: contain;
}

.mission-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.mission-actions.compact {
  justify-content: flex-end;
}

.secondary-action {
  background: var(--leaf);
}

.mission-choices {
  align-self: start;
}

.mission-review {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 10px;
  align-content: start;
}

.mission-review .mini-word {
  min-height: 118px;
  grid-template-columns: 1fr;
  justify-items: center;
  text-align: center;
}

.mission-review .mini-image {
  width: 58px;
  height: 58px;
}

.mission-summary {
  margin: 0;
  color: var(--leaf-dark);
  font-weight: 950;
}

.hero-card {
  min-height: 420px;
  padding: 18px;
  display: grid;
  grid-template-rows: minmax(190px, 1fr) auto auto;
  gap: 14px;
}

.hero-image,
.choice-image,
.mini-image {
  background-position: center;
  background-repeat: no-repeat;
  background-size: contain;
}

.hero-image {
  min-height: 220px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background-color: #f7fbf8;
}

.foundation-visual {
  display: grid;
  place-items: center;
  align-content: center;
  gap: 8px;
  padding: 16px;
  color: var(--ink);
}

.foundation-main {
  font-size: clamp(4rem, 12vw, 8rem);
  line-height: 0.9;
  font-weight: 950;
}

.foundation-sub {
  color: var(--muted);
  font-size: 1.15rem;
  font-weight: 950;
}

.mini-foundation {
  width: 44px;
  height: 44px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #f7fbf8;
  display: inline-grid;
  place-items: center;
  color: var(--leaf-dark);
  font-size: 1.22rem;
  font-weight: 950;
}

.choice-card .foundation-visual {
  min-height: 190px;
  border-radius: 8px;
  background: #f7fbf8;
}

.choice-card .foundation-main {
  font-size: clamp(3rem, 9vw, 5.8rem);
}

.number-dots {
  width: min(220px, 100%);
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 6px;
}

.number-dots span {
  width: 11px;
  height: 11px;
  border-radius: 999px;
  background: var(--leaf);
}

.tens-dots span {
  width: 28px;
  height: 8px;
  border-radius: 999px;
}

.word-copy {
  display: grid;
  gap: 2px;
}

.english-word {
  margin: 0;
  font-size: 2.25rem;
  line-height: 1.05;
  font-weight: 950;
}

.indo-word {
  color: var(--muted);
  font-size: 1.05rem;
  font-weight: 850;
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.primary-action {
  min-height: 48px;
  border: 0;
  border-radius: 8px;
  background: var(--blue);
  color: #fff;
  padding: 0 18px;
  font-weight: 950;
  cursor: pointer;
}

.nav-actions {
  display: flex;
  gap: 8px;
}

.side-list {
  padding: 12px;
  display: grid;
  grid-template-rows: auto 1fr;
  gap: 10px;
  max-height: min(620px, calc(100dvh - 244px));
  min-height: 0;
}

.side-title {
  margin: 0;
  color: var(--muted);
  font-size: 0.86rem;
  font-weight: 950;
  text-transform: uppercase;
}

.word-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  align-content: start;
  gap: 8px;
  overflow: auto;
  padding-right: 2px;
}

.mini-word {
  min-height: 92px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  padding: 8px;
  display: grid;
  grid-template-columns: 44px 1fr;
  align-items: center;
  gap: 8px;
  text-align: left;
  cursor: pointer;
}

.mini-word.active {
  border-color: var(--leaf);
  background: var(--soft-green);
}

.mini-image {
  width: 44px;
  height: 44px;
}

.mini-label {
  min-width: 0;
  display: grid;
  gap: 1px;
}

.mini-label strong,
.mini-label span {
  overflow-wrap: anywhere;
}

.mini-label strong {
  font-size: 0.92rem;
}

.mini-label span {
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 800;
}

.quiz-card {
  min-height: 420px;
  padding: 18px;
  display: grid;
  grid-template-rows: auto 1fr auto;
  gap: 14px;
}

.quiz-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.quiz-title {
  margin: 0;
  font-size: 1.35rem;
  line-height: 1.2;
}

.quiz-progress {
  margin: 2px 0 0;
  color: var(--muted);
  font-size: 0.86rem;
  font-weight: 950;
}

.quiz-actions {
  display: flex;
  gap: 8px;
}

.choices-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.choice-card {
  min-height: 260px;
  padding: 12px;
  cursor: pointer;
  display: grid;
  grid-template-rows: 1fr auto;
  gap: 10px;
  text-align: center;
}

.choice-card:disabled {
  cursor: default;
}

.choice-card:disabled:not(.correct) {
  opacity: 0.72;
}

.choice-card.correct {
  border-color: var(--leaf);
  background: var(--soft-green);
}

.choice-card.retry {
  border-color: var(--coral);
  background: var(--soft-coral);
}

.choice-image {
  min-height: 190px;
  border-radius: 8px;
  background-color: #f7fbf8;
}

.choice-label {
  font-weight: 950;
  font-size: 1.05rem;
}

.feedback {
  min-height: 26px;
  color: var(--leaf-dark);
  font-weight: 950;
}

.match-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  align-items: start;
}

.match-column {
  display: grid;
  gap: 8px;
}

.match-card {
  min-height: 58px;
  padding: 12px;
  cursor: pointer;
  font-weight: 950;
  text-align: left;
}

.match-card.selected {
  border-color: var(--blue);
  background: var(--soft-blue);
}

.match-card.done {
  border-color: var(--leaf);
  background: var(--soft-green);
  color: var(--leaf-dark);
}

.status-bar {
  min-height: 50px;
  border-radius: 8px;
  padding: 0 16px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto auto;
  align-items: center;
  gap: 12px;
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 900;
}

.status-reset {
  width: 36px;
  height: 36px;
  box-shadow: none;
}

.hidden {
  display: none !important;
}

@media (max-width: 820px) {
  .app-shell {
    width: min(100% - 16px, 560px);
    min-height: calc(100dvh - 16px);
    margin: 8px auto;
  }

  .topbar {
    min-height: 72px;
    padding: 12px;
  }

  h1 {
    font-size: 1.25rem;
  }

  .stage {
    padding: 10px;
  }

  .mode-tabs {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    overflow: visible;
  }

  .age-band-strip {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    overflow: visible;
  }

  .mode-tab {
    min-width: 0;
    padding: 0 6px;
    font-size: 0.95rem;
  }

  .age-chip {
    min-width: 0;
    padding: 0 6px;
    font-size: 0.9rem;
  }

  .word-layout,
  .mission-word,
  .match-grid {
    grid-template-columns: 1fr;
  }

  .mission-panel,
  .word-panel,
  .listen-panel,
  .match-panel,
  .mission-card,
  .hero-card,
  .quiz-card {
    min-height: auto;
  }

  .hero-card {
    grid-template-rows: minmax(190px, auto) auto auto;
  }

  .side-list {
    max-height: 250px;
  }

  .choices-grid {
    grid-template-columns: 1fr;
  }

  .mission-top {
    display: grid;
  }

  .mission-dots {
    justify-content: start;
  }

  .mission-word {
    min-height: auto;
  }

  .mission-image {
    min-height: 230px;
  }

  .mission-review {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .choice-card {
    min-height: 132px;
    grid-template-columns: 112px 1fr;
    grid-template-rows: 1fr;
    text-align: left;
    align-items: center;
  }

  .choice-image {
    min-height: 108px;
    height: 108px;
  }
}

@media (prefers-reduced-motion: no-preference) {
  .choice-card,
  .match-card,
  .mission-dot,
  .mini-word,
  .primary-action,
  .round-button,
  .icon-button {
    transition: transform 140ms ease, background-color 140ms ease, border-color 140ms ease;
  }

  .choice-card:active,
  .match-card:active,
  .mini-word:active,
  .primary-action:active,
  .round-button:active,
  .icon-button:active {
    transform: scale(0.98);
  }
}