:root {
  --ink: #2f2935;
  --muted: #746c78;
  --cream: #fff8ee;
  --paper: #fffdf9;
  --line: #e9e0d7;
  --coral: #f47f64;
  --coral-dark: #d95f48;
  --coral-soft: #ffe3d9;
  --teal: #3d9998;
  --teal-dark: #267776;
  --teal-soft: #dff4ef;
  --yellow: #f4be47;
  --yellow-soft: #fff2c8;
  --blue: #5598d5;
  --blue-soft: #e4f1fb;
  --purple: #8666c7;
  --purple-soft: #eee7fb;
  --green: #5c9f72;
  --green-soft: #e4f2e7;
  --shadow: 0 18px 55px rgba(67, 50, 38, 0.09);
  --shadow-small: 0 8px 24px rgba(67, 50, 38, 0.08);
}

* {
  box-sizing: border-box;
}

html {
  min-height: 100%;
  background: var(--cream);
  -webkit-text-size-adjust: 100%;
}

body {
  min-width: 320px;
  min-height: 100vh;
  min-height: 100dvh;
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 4% 8%, rgba(244, 190, 71, 0.12), transparent 24rem),
    radial-gradient(circle at 96% 28%, rgba(61, 153, 152, 0.1), transparent 26rem),
    var(--cream);
  font-family: -apple-system, BlinkMacSystemFont, "PingFang HK", "PingFang TC",
    "Noto Sans TC", "Microsoft JhengHei", sans-serif;
  -webkit-font-smoothing: antialiased;
}

button {
  color: inherit;
  font: inherit;
  -webkit-tap-highlight-color: transparent;
}

button:focus-visible {
  outline: 4px solid rgba(85, 152, 213, 0.36);
  outline-offset: 3px;
}

button:disabled {
  cursor: default;
}

.app-shell {
  width: min(1180px, calc(100% - 48px));
  min-height: 100vh;
  min-height: 100dvh;
  margin: 0 auto;
  padding: max(20px, env(safe-area-inset-top)) 0 max(24px, env(safe-area-inset-bottom));
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 60px;
  margin-bottom: 30px;
}

.brand {
  display: flex;
  gap: 12px;
  align-items: center;
  padding: 0;
  border: 0;
  background: transparent;
  text-align: left;
  cursor: pointer;
}

.brand > span:last-child {
  display: grid;
  gap: 1px;
}

.brand strong {
  font-size: 19px;
  letter-spacing: 0.02em;
}

.brand small {
  color: var(--muted);
  font-size: 11px;
}

.brand-mark {
  display: grid;
  width: 44px;
  height: 44px;
  padding: 7px;
  grid-template-columns: repeat(2, 1fr);
  gap: 4px;
  border-radius: 14px;
  background: var(--coral);
  box-shadow: 0 7px 16px rgba(244, 127, 100, 0.26);
  transform: rotate(-2deg);
}

.brand-mark i {
  border-radius: 50%;
  background: var(--paper);
}

.icon-button,
.round-button {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line);
  background: rgba(255, 253, 249, 0.72);
  box-shadow: var(--shadow-small);
  cursor: pointer;
}

.icon-button {
  gap: 8px;
  padding: 0 17px;
  border-radius: 16px;
  font-size: 14px;
  font-weight: 700;
}

.home {
  display: grid;
  gap: 38px;
}

.welcome-card {
  position: relative;
  display: grid;
  min-height: 350px;
  padding: 54px 56px;
  overflow: hidden;
  grid-template-columns: minmax(0, 1.25fr) minmax(300px, 0.75fr);
  gap: 56px;
  align-items: center;
  border: 1px solid rgba(244, 127, 100, 0.13);
  border-radius: 36px;
  background:
    linear-gradient(120deg, rgba(255, 255, 255, 0.82), rgba(255, 244, 231, 0.72)),
    var(--paper);
  box-shadow: var(--shadow);
}

.welcome-card::before,
.welcome-card::after {
  position: absolute;
  border-radius: 50%;
  content: "";
  pointer-events: none;
}

.welcome-card::before {
  top: -120px;
  right: -90px;
  width: 330px;
  height: 330px;
  background: rgba(244, 190, 71, 0.13);
}

.welcome-card::after {
  bottom: -180px;
  left: 38%;
  width: 320px;
  height: 320px;
  background: rgba(61, 153, 152, 0.08);
}

.welcome-copy,
.daily-card {
  position: relative;
  z-index: 1;
}

.date-label,
.eyebrow,
.question-eyebrow {
  margin: 0 0 10px;
  color: var(--teal-dark);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.welcome-copy h1 {
  max-width: 630px;
  margin: 0;
  font-size: clamp(34px, 4.4vw, 56px);
  line-height: 1.14;
  letter-spacing: -0.035em;
}

.welcome-copy > p:not(.date-label) {
  max-width: 560px;
  margin: 20px 0 28px;
  color: var(--muted);
  font-size: 17px;
  line-height: 1.75;
}

.primary-button,
.secondary-button {
  display: inline-flex;
  min-height: 58px;
  align-items: center;
  justify-content: center;
  border-radius: 18px;
  font-weight: 800;
  cursor: pointer;
  transition: transform 160ms ease, box-shadow 160ms ease, background 160ms ease;
}

.primary-button {
  gap: 24px;
  padding: 0 24px;
  border: 0;
  color: white;
  background: var(--coral);
  box-shadow: 0 10px 24px rgba(217, 95, 72, 0.22);
}

.primary-button:hover {
  background: var(--coral-dark);
  transform: translateY(-2px);
}

.primary-button:active,
.secondary-button:active,
.skill-card:active,
.answer-button:active {
  transform: translateY(1px) scale(0.99);
}

.full-width {
  width: 100%;
}

.daily-card {
  width: min(100%, 330px);
  margin-left: auto;
  padding: 26px;
  border: 1px solid rgba(61, 153, 152, 0.17);
  border-radius: 28px;
  background: rgba(255, 253, 249, 0.9);
  box-shadow: var(--shadow-small);
}

.mascot {
  position: relative;
  display: grid;
  width: 118px;
  height: 118px;
  margin: -76px auto 18px;
  place-items: center;
  border: 8px solid var(--paper);
  border-radius: 38px;
  background: var(--teal);
  box-shadow: 0 14px 25px rgba(38, 119, 118, 0.2);
  transform: rotate(3deg);
}

.mascot-face {
  position: relative;
  display: flex;
  width: 58px;
  justify-content: space-between;
}

.mascot-face i {
  width: 9px;
  height: 13px;
  border-radius: 50%;
  background: var(--paper);
}

.mascot-face b {
  position: absolute;
  top: 27px;
  left: 14px;
  width: 30px;
  height: 15px;
  border-bottom: 4px solid var(--paper);
  border-radius: 0 0 50% 50%;
}

.spark {
  position: absolute;
  color: var(--yellow);
  font-size: 20px;
}

.spark-one {
  top: -16px;
  left: -18px;
}

.spark-two {
  right: -22px;
  bottom: 8px;
}

.daily-row {
  display: flex;
  justify-content: space-between;
  margin-bottom: 12px;
  font-size: 14px;
}

.daily-row span {
  color: var(--muted);
}

.progress-track {
  display: block;
  width: 100%;
  height: 10px;
  overflow: hidden;
  padding: 0;
  border: 0;
  border-radius: 999px;
  background: #eee7df;
  appearance: none;
  -webkit-appearance: none;
}

.progress-track::-webkit-progress-bar {
  border-radius: inherit;
  background: #eee7df;
}

.progress-track::-webkit-progress-value {
  border-radius: inherit;
  background: var(--teal);
}

.progress-track::-moz-progress-bar {
  border-radius: inherit;
  background: var(--teal);
}

.daily-card > p {
  margin: 14px 0 0;
  color: var(--muted);
  font-size: 13px;
  text-align: center;
}

.practice-section {
  display: grid;
  gap: 20px;
}

.section-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 24px;
}

.section-heading h2 {
  margin: 0;
  font-size: 27px;
  letter-spacing: -0.025em;
}

.section-heading .eyebrow {
  margin-bottom: 6px;
}

.text-button,
.back-link,
.danger-link {
  border: 0;
  background: transparent;
  font-weight: 750;
  cursor: pointer;
}

.text-button {
  padding: 10px 0;
  color: var(--teal-dark);
}

.skill-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.skill-card {
  position: relative;
  display: grid;
  min-height: 142px;
  padding: 24px;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 18px;
  align-items: center;
  overflow: hidden;
  border: 1px solid rgba(0, 0, 0, 0.045);
  border-radius: 26px;
  text-align: left;
  cursor: pointer;
  transition: transform 160ms ease, box-shadow 160ms ease;
}

.skill-card:hover {
  box-shadow: var(--shadow-small);
  transform: translateY(-3px);
}

.skill-card.coral {
  background: var(--coral-soft);
}

.skill-card.blue {
  background: var(--blue-soft);
}

.skill-card.purple {
  background: var(--purple-soft);
}

.skill-card.green {
  background: var(--green-soft);
}

.skill-icon {
  display: grid;
  width: 58px;
  height: 58px;
  place-items: center;
  border-radius: 19px;
  background: rgba(255, 255, 255, 0.72);
  font-size: 27px;
}

.skill-copy {
  display: grid;
  gap: 7px;
}

.skill-copy strong {
  font-size: 19px;
}

.skill-copy small {
  color: #685f69;
  font-size: 13px;
  line-height: 1.5;
}

.skill-example {
  align-self: start;
  padding: 7px 11px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.64);
  font-size: 12px;
  font-weight: 800;
}

.skill-arrow {
  position: absolute;
  right: 25px;
  bottom: 20px;
  font-size: 20px;
}

.grownup-strip {
  display: flex;
  min-height: 100px;
  padding: 20px 24px;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: rgba(255, 253, 249, 0.72);
}

.grownup-strip > div {
  display: flex;
  align-items: center;
  gap: 16px;
}

.grownup-icon {
  display: grid;
  width: 48px;
  height: 48px;
  place-items: center;
  border-radius: 16px;
  background: var(--green-soft);
}

.grownup-strip strong {
  display: block;
  margin-bottom: 4px;
}

.grownup-strip p {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
}

.secondary-button {
  min-height: 48px;
  padding: 0 18px;
  border: 1px solid var(--line);
  background: var(--paper);
}

.footer-note {
  padding-top: 38px;
  color: #918792;
  font-size: 11px;
  text-align: center;
}

.install-dialog {
  width: min(430px, calc(100% - 36px));
  padding: 36px;
  border: 0;
  border-radius: 28px;
  color: var(--ink);
  background: var(--paper);
  box-shadow: 0 30px 100px rgba(47, 41, 53, 0.25);
}

.install-dialog::backdrop {
  background: rgba(47, 41, 53, 0.45);
  backdrop-filter: blur(3px);
}

.dialog-close {
  position: absolute;
  top: 15px;
  right: 15px;
  width: 40px;
  height: 40px;
  border: 0;
  border-radius: 50%;
  background: #f1ece6;
  font-size: 24px;
  cursor: pointer;
}

.dialog-icon {
  font-size: 42px;
}

.install-dialog h2 {
  margin: 13px 0 8px;
}

.install-dialog > p {
  margin: 0;
  color: var(--muted);
  line-height: 1.6;
}

.install-dialog ol {
  display: grid;
  margin: 24px 0;
  padding: 0;
  gap: 12px;
  list-style: none;
}

.install-dialog li {
  display: flex;
  align-items: center;
  gap: 12px;
}

.install-dialog li span {
  display: grid;
  width: 30px;
  height: 30px;
  flex: 0 0 auto;
  place-items: center;
  border-radius: 50%;
  color: var(--teal-dark);
  background: var(--teal-soft);
  font-size: 13px;
  font-weight: 800;
}

/* Practice */
.practice-shell {
  min-height: 100vh;
  min-height: 100dvh;
  padding: max(24px, env(safe-area-inset-top)) max(24px, env(safe-area-inset-right))
    max(24px, env(safe-area-inset-bottom)) max(24px, env(safe-area-inset-left));
  background:
    radial-gradient(circle at 12% 18%, rgba(244, 190, 71, 0.14), transparent 22rem),
    radial-gradient(circle at 90% 82%, rgba(85, 152, 213, 0.12), transparent 26rem),
    var(--cream);
}

.practice-header {
  display: grid;
  width: min(1120px, 100%);
  min-height: 58px;
  margin: 0 auto 24px;
  grid-template-columns: 64px minmax(220px, 1fr) auto;
  gap: 22px;
  align-items: center;
}

.round-button {
  width: 50px;
  min-height: 50px;
  border-radius: 17px;
  font-size: 28px;
}

.session-progress {
  display: flex;
  align-items: center;
  gap: 14px;
}

.session-progress > progress {
  height: 11px;
  flex: 1;
  overflow: hidden;
  border: 0;
  border-radius: 99px;
  background: #eadfd4;
  appearance: none;
  -webkit-appearance: none;
}

.session-progress > progress::-webkit-progress-bar {
  border-radius: inherit;
  background: #eadfd4;
}

.session-progress > progress::-webkit-progress-value {
  border-radius: inherit;
  background: var(--coral);
}

.session-progress > progress::-moz-progress-bar {
  border-radius: inherit;
  background: var(--coral);
}

.session-progress strong {
  min-width: 54px;
  color: var(--muted);
  font-size: 13px;
}

.session-skill {
  padding: 10px 14px;
  border-radius: 14px;
  background: rgba(255, 253, 249, 0.78);
  font-size: 13px;
  font-weight: 800;
}

.question-layout {
  display: grid;
  width: min(1120px, 100%);
  min-height: calc(100dvh - 130px);
  margin: 0 auto;
  grid-template-columns: minmax(0, 1.3fr) minmax(330px, 0.7fr);
  gap: 24px;
}

.question-card,
.answer-panel {
  border: 1px solid rgba(67, 50, 38, 0.07);
  border-radius: 32px;
  background: rgba(255, 253, 249, 0.9);
  box-shadow: var(--shadow);
}

.question-card {
  display: flex;
  min-height: 590px;
  padding: 48px;
  align-items: center;
  flex-direction: column;
  justify-content: center;
  text-align: center;
}

.question-eyebrow {
  margin-bottom: 14px;
}

.question-card h1 {
  margin: 0;
  font-size: clamp(48px, 7vw, 78px);
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.035em;
}

.question-card h1.compact {
  font-size: clamp(34px, 5vw, 54px);
  line-height: 1.2;
}

.learning-visual {
  display: grid;
  width: 100%;
  min-height: 190px;
  margin: 26px 0 18px;
  place-items: center;
  border-radius: 26px;
  background:
    linear-gradient(rgba(255, 255, 255, 0.6), rgba(255, 255, 255, 0.6)),
    repeating-linear-gradient(0deg, transparent, transparent 27px, rgba(61, 153, 152, 0.06) 28px);
}

.question-actions {
  display: flex;
  max-width: 100%;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 10px;
}

.hint-button,
.speech-button {
  min-height: 46px;
  padding: 0 16px;
  border: 0;
  border-radius: 14px;
  font-size: 13px;
  font-weight: 800;
  cursor: pointer;
}

.hint-button {
  color: var(--teal-dark);
  background: var(--teal-soft);
}

.speech-button {
  color: #315e88;
  background: var(--blue-soft);
}

.hint-speech-button {
  color: #725916;
  background: var(--yellow-soft);
}

.hint-text {
  max-width: 570px;
  margin: 0;
  padding: 12px 16px;
  border-radius: 14px;
  color: #5f5961;
  background: var(--yellow-soft);
  font-size: 14px;
  line-height: 1.55;
}

.hint-text span {
  margin-right: 8px;
}

.speech-status {
  min-height: 17px;
  margin: 0;
  color: var(--muted);
  font-size: 11px;
  line-height: 1.45;
}

.ten-frame-wrap {
  display: grid;
  gap: 14px;
}

.ten-frame {
  display: grid;
  padding: 10px;
  grid-template-columns: repeat(5, 42px);
  gap: 9px;
  border: 3px solid #9d8f83;
  border-radius: 16px;
  background: var(--paper);
}

.ten-frame i {
  width: 42px;
  height: 42px;
  border: 2px dashed #d6cbc0;
  border-radius: 50%;
}

.ten-frame i.filled {
  border: 4px solid var(--paper);
  background: var(--teal);
  box-shadow: 0 0 0 2px var(--teal);
}

.visual-caption {
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: var(--muted);
  font-size: 12px;
}

.visual-caption span {
  display: grid;
  width: 28px;
  height: 28px;
  place-items: center;
  border-radius: 50%;
  color: white;
  background: var(--teal);
  font-weight: 800;
}

.bridge-visual {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  font-size: 25px;
  font-weight: 900;
}

.number-bubble {
  display: grid;
  width: 62px;
  height: 62px;
  place-items: center;
  border-radius: 21px;
  color: white;
  box-shadow: 0 8px 18px rgba(47, 41, 53, 0.1);
}

.number-bubble.teal {
  background: var(--teal);
}

.number-bubble.yellow {
  color: #594719;
  background: var(--yellow);
}

.number-bubble.pale {
  color: var(--ink);
  background: #eee7df;
}

.number-bubble.coral {
  background: var(--coral);
}

.number-bubble.purple {
  background: var(--purple);
}

.split-group {
  position: relative;
  display: grid;
  padding-bottom: 29px;
  grid-template-columns: repeat(2, auto);
  gap: 6px;
}

.split-group::before {
  position: absolute;
  right: 27px;
  bottom: 22px;
  left: 27px;
  height: 16px;
  border: solid #b5a89c;
  border-width: 0 2px 2px;
  border-radius: 0 0 8px 8px;
  content: "";
}

.split-group small {
  position: absolute;
  right: -30px;
  bottom: 0;
  left: -30px;
  color: var(--muted);
  font-size: 11px;
  white-space: nowrap;
}

.family-house {
  width: 230px;
  filter: drop-shadow(0 12px 20px rgba(67, 50, 38, 0.12));
}

.roof {
  display: grid;
  height: 100px;
  place-items: end center;
  padding-bottom: 18px;
  background: var(--coral);
  clip-path: polygon(50% 0, 100% 100%, 0 100%);
}

.roof span {
  display: grid;
  width: 48px;
  height: 48px;
  place-items: center;
  border-radius: 50%;
  background: var(--paper);
  font-size: 21px;
  font-weight: 900;
}

.house-body {
  display: flex;
  height: 82px;
  align-items: center;
  justify-content: center;
  gap: 16px;
  border-radius: 0 0 18px 18px;
  background: var(--yellow-soft);
}

.house-body span {
  display: grid;
  width: 44px;
  height: 44px;
  place-items: center;
  border-radius: 14px;
  background: var(--paper);
  font-size: 20px;
  font-weight: 900;
}

.house-body b {
  color: var(--muted);
}

.number-bond {
  position: relative;
  width: 240px;
  height: 164px;
}

.number-bond > span {
  position: absolute;
  z-index: 1;
  display: grid;
  width: 62px;
  height: 62px;
  place-items: center;
  border-radius: 21px;
  background: var(--paper);
  box-shadow: 0 8px 18px rgba(47, 41, 53, 0.12);
  font-size: 25px;
  font-weight: 900;
}

.number-bond .bond-total {
  top: 0;
  left: 89px;
  color: white;
  background: var(--coral);
}

.number-bond .bond-part {
  bottom: 0;
  left: 30px;
  color: var(--teal-dark);
  background: var(--teal-soft);
}

.number-bond .bond-part.unknown {
  right: 30px;
  left: auto;
  color: #725916;
  background: var(--yellow-soft);
}

.number-bond i {
  position: absolute;
  top: 58px;
  left: 116px;
  width: 3px;
  height: 72px;
  border-radius: 99px;
  background: #b9aea3;
  transform: rotate(47deg);
  transform-origin: top;
}

.number-bond i:nth-of-type(2) {
  left: 123px;
  transform: rotate(-47deg);
}

.jump-track {
  display: flex;
  max-width: 100%;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.jump-track span,
.sorting-visual span {
  display: grid;
  min-width: 54px;
  height: 54px;
  padding: 0 10px;
  place-items: center;
  border-radius: 18px;
  color: white;
  background: var(--teal);
  box-shadow: 0 7px 16px rgba(38, 119, 118, 0.16);
  font-size: 20px;
  font-weight: 900;
}

.jump-track span.unknown {
  color: #725916;
  background: var(--yellow);
}

.jump-track b {
  color: var(--muted);
  font-size: 11px;
}

.pattern-visual {
  display: grid;
  justify-items: center;
  gap: 13px;
}

.pattern-track {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.pattern-track span {
  display: grid;
  min-width: 52px;
  height: 52px;
  padding: 0 8px;
  place-items: center;
  border-radius: 17px;
  color: white;
  background: var(--green);
  box-shadow: 0 7px 16px rgba(47, 41, 53, 0.1);
  font-size: 18px;
  font-weight: 900;
}

.pattern-track span:nth-child(even) {
  color: var(--ink);
  background: var(--green-soft);
}

.pattern-track span.unknown {
  color: #725916;
  background: var(--yellow);
}

.pattern-visual small {
  color: var(--teal-dark);
  font-size: 12px;
  font-weight: 800;
}

.multiplication-array {
  display: grid;
  justify-items: center;
  gap: 5px;
}

.multiplication-array > div {
  display: flex;
  gap: 5px;
}

.multiplication-array i {
  width: 15px;
  height: 15px;
  border-radius: 5px;
  background: var(--purple);
  box-shadow: inset 0 -2px 0 rgba(47, 41, 53, 0.14);
}

.multiplication-array small,
.sorting-visual small,
.odd-even-visual small {
  margin-top: 7px;
  color: var(--muted);
  font-size: 11px;
  font-weight: 750;
}

.compare-visual {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 24px;
}

.compare-visual span {
  display: grid;
  width: 90px;
  height: 90px;
  place-items: center;
  border: 4px solid var(--paper);
  border-radius: 28px;
  color: white;
  background: var(--green);
  box-shadow: 0 0 0 2px var(--green), 0 10px 20px rgba(47, 41, 53, 0.12);
  font-size: 31px;
  font-weight: 900;
}

.compare-visual b {
  padding: 9px 12px;
  border-radius: 999px;
  color: var(--teal-dark);
  background: var(--teal-soft);
  font-size: 12px;
}

.sorting-visual {
  display: flex;
  max-width: 100%;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 10px;
}

.sorting-visual span:nth-child(even) {
  color: var(--ink);
  background: var(--yellow-soft);
}

.sorting-visual small {
  width: 100%;
}

.odd-even-visual {
  display: grid;
  justify-items: center;
  gap: 8px;
}

.odd-even-visual > div {
  display: flex;
  gap: 5px;
}

.odd-even-visual span {
  display: grid;
  width: 68px;
  height: 82px;
  place-items: center;
  border-radius: 22px;
  color: var(--ink);
  background: var(--paper);
  box-shadow: var(--shadow-small);
  font-size: 44px;
  font-weight: 900;
}

.odd-even-visual span.last-digit {
  color: white;
  background: var(--coral);
}

.answer-panel {
  display: flex;
  min-height: 590px;
  padding: 34px;
  flex-direction: column;
}

.answer-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.answer-heading p {
  margin: 0;
  font-size: 18px;
  font-weight: 900;
}

.answer-heading span {
  color: var(--muted);
  font-size: 12px;
}

.answer-grid {
  display: grid;
  margin: 25px 0;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 13px;
}

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

.answer-button {
  min-height: 105px;
  border: 2px solid #e7ddd3;
  border-radius: 23px;
  background: var(--paper);
  box-shadow: 0 5px 0 #e7ddd3;
  font-size: 33px;
  font-weight: 900;
  cursor: pointer;
  transition: transform 120ms ease, border 120ms ease, background 120ms ease;
}

.answer-button.text-answer {
  padding: 12px;
  font-size: 18px;
  line-height: 1.35;
}

.answer-button:hover:not(:disabled) {
  border-color: var(--teal);
  background: var(--teal-soft);
}

.answer-button.wrong {
  border-color: #e98a7a;
  color: #ad4c3d;
  background: #fff0ec;
  box-shadow: 0 5px 0 #f0c1b8;
  opacity: 0.7;
}

.answer-button.correct {
  border-color: var(--green);
  color: #286d40;
  background: var(--green-soft);
  box-shadow: 0 5px 0 #bdd9c5;
}

.feedback {
  display: flex;
  min-height: 104px;
  margin-top: auto;
  padding: 17px;
  align-items: flex-start;
  gap: 13px;
  border-radius: 19px;
}

.feedback.answering {
  align-items: center;
  justify-content: center;
  border: 1px dashed var(--line);
}

.feedback.correct {
  color: #2e6f46;
  background: var(--green-soft);
}

.feedback.try-again {
  color: #875c12;
  background: var(--yellow-soft);
}

.feedback-icon {
  display: grid;
  width: 34px;
  height: 34px;
  flex: 0 0 auto;
  place-items: center;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.7);
  font-weight: 900;
}

.feedback strong {
  display: block;
  margin-bottom: 4px;
}

.feedback p {
  margin: 0;
  font-size: 13px;
  line-height: 1.55;
}

.feedback-placeholder {
  color: var(--muted);
}

.next-button {
  width: 100%;
  margin-top: 14px;
}

/* Completion */
.complete-screen {
  position: relative;
  display: grid;
  min-height: 100vh;
  min-height: 100dvh;
  padding: max(30px, env(safe-area-inset-top)) 20px max(30px, env(safe-area-inset-bottom));
  overflow: hidden;
  place-items: center;
  background:
    radial-gradient(circle at 50% 25%, rgba(244, 190, 71, 0.22), transparent 28rem),
    var(--cream);
}

.complete-card {
  position: relative;
  z-index: 1;
  width: min(530px, 100%);
  padding: 46px;
  border: 1px solid var(--line);
  border-radius: 34px;
  background: var(--paper);
  box-shadow: var(--shadow);
  text-align: center;
}

.trophy {
  font-size: 58px;
}

.complete-card h1 {
  margin: 0;
  font-size: clamp(30px, 5vw, 42px);
  line-height: 1.2;
}

.complete-card > p:not(.eyebrow) {
  margin: 14px 0;
  color: var(--muted);
  line-height: 1.65;
}

.star-row {
  display: flex;
  margin: 18px 0 24px;
  justify-content: center;
  gap: 10px;
  color: #ddd4c9;
  font-size: 38px;
}

.star-row .earned {
  color: var(--yellow);
  filter: drop-shadow(0 5px 5px rgba(244, 190, 71, 0.26));
}

.result-grid {
  display: grid;
  margin-bottom: 26px;
  grid-template-columns: repeat(3, 1fr);
  border: 1px solid var(--line);
  border-radius: 20px;
}

.result-grid div {
  display: grid;
  padding: 17px 8px;
  gap: 4px;
}

.result-grid div + div {
  border-left: 1px solid var(--line);
}

.result-grid strong {
  font-size: 25px;
}

.result-grid span {
  color: var(--muted);
  font-size: 11px;
}

.complete-card > .text-button {
  margin-top: 10px;
}

.celebration span {
  position: absolute;
  color: var(--coral);
  font-size: 30px;
  animation: float 2.8s ease-in-out infinite alternate;
}

.celebration span:nth-child(1) {
  top: 12%;
  left: 14%;
}

.celebration span:nth-child(2) {
  top: 28%;
  right: 12%;
  color: var(--teal);
  animation-delay: -1s;
}

.celebration span:nth-child(3) {
  right: 22%;
  bottom: 12%;
  color: var(--yellow);
  animation-delay: -0.4s;
}

.celebration span:nth-child(4) {
  bottom: 16%;
  left: 20%;
  color: var(--purple);
  animation-delay: -1.6s;
}

.celebration span:nth-child(5) {
  top: 8%;
  right: 28%;
  color: var(--green);
  animation-delay: -2s;
}

/* Parent */
.parent-page {
  width: min(980px, 100%);
  margin: 0 auto;
}

.back-link {
  min-height: 44px;
  padding: 0;
  color: var(--teal-dark);
}

.parent-heading {
  display: flex;
  margin: 20px 0 26px;
  align-items: end;
  justify-content: space-between;
  gap: 24px;
}

.parent-heading-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.parent-heading h1 {
  margin: 0;
  font-size: 42px;
  letter-spacing: -0.035em;
}

.parent-heading p:not(.eyebrow) {
  margin: 10px 0 0;
  color: var(--muted);
}

.privacy-pill {
  padding: 10px 14px;
  border-radius: 999px;
  color: #427052;
  background: var(--green-soft);
  font-size: 12px;
  font-weight: 800;
  white-space: nowrap;
}

.stats-grid {
  display: grid;
  margin-bottom: 18px;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}

.stat-card {
  position: relative;
  display: grid;
  min-height: 140px;
  padding: 21px;
  align-content: center;
  border: 1px solid var(--line);
  border-radius: 22px;
  background: var(--paper);
  box-shadow: var(--shadow-small);
}

.stat-card > span {
  color: var(--muted);
  font-size: 12px;
}

.stat-card strong {
  margin: 7px 0 -27px;
  font-size: 38px;
}

.stat-card small {
  justify-self: end;
  color: var(--teal-dark);
  font-weight: 800;
}

.progress-card {
  padding: 30px;
  border: 1px solid var(--line);
  border-radius: 26px;
  background: var(--paper);
  box-shadow: var(--shadow-small);
}

.skill-progress-list {
  display: grid;
  margin-top: 26px;
  gap: 22px;
}

.skill-progress-row {
  display: grid;
  grid-template-columns: 48px 1fr;
  gap: 14px;
  align-items: center;
}

.mini-skill-icon {
  display: grid;
  width: 48px;
  height: 48px;
  place-items: center;
  border-radius: 15px;
  font-size: 21px;
}

.mini-skill-icon.coral {
  background: var(--coral-soft);
}

.mini-skill-icon.blue {
  background: var(--blue-soft);
}

.mini-skill-icon.purple {
  background: var(--purple-soft);
}

.mini-skill-icon.green {
  background: var(--green-soft);
}

.skill-progress-copy {
  display: grid;
  gap: 9px;
}

.skill-progress-copy > div:first-child {
  display: flex;
  justify-content: space-between;
  gap: 16px;
}

.skill-progress-copy span {
  color: var(--muted);
  font-size: 12px;
}

.progress-track.coral::-webkit-progress-value {
  background: var(--coral);
}

.progress-track.coral::-moz-progress-bar {
  background: var(--coral);
}

.progress-track.blue::-webkit-progress-value {
  background: var(--blue);
}

.progress-track.blue::-moz-progress-bar {
  background: var(--blue);
}

.progress-track.purple::-webkit-progress-value {
  background: var(--purple);
}

.progress-track.purple::-moz-progress-bar {
  background: var(--purple);
}

.progress-track.green::-webkit-progress-value {
  background: var(--green);
}

.progress-track.green::-moz-progress-bar {
  background: var(--green);
}

.parent-tip {
  display: flex;
  margin-top: 18px;
  padding: 22px 24px;
  gap: 14px;
  border-radius: 22px;
  background: var(--yellow-soft);
}

.parent-tip > span {
  font-size: 24px;
}

.parent-tip strong {
  display: block;
  margin-bottom: 5px;
}

.parent-tip p {
  margin: 0;
  color: #6e5c35;
  font-size: 13px;
  line-height: 1.6;
}

.danger-link {
  display: block;
  margin: 28px auto 0;
  padding: 12px;
  color: #a24e42;
  font-size: 12px;
}

/* Parent settings */
.settings-page {
  width: min(1040px, 100%);
  margin: 0 auto;
}

.settings-heading {
  display: flex;
  margin: 20px 0 24px;
  align-items: end;
  justify-content: space-between;
  gap: 30px;
}

.settings-heading h1 {
  margin: 0;
  font-size: 42px;
  letter-spacing: -0.035em;
}

.settings-heading p:not(.eyebrow) {
  margin: 10px 0 0;
  color: var(--muted);
}

.daily-setting {
  display: grid;
  min-width: 210px;
  padding: 15px 17px;
  gap: 7px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--paper);
  box-shadow: var(--shadow-small);
}

.daily-setting span,
.settings-fields label > span {
  color: var(--muted);
  font-size: 11px;
  font-weight: 750;
}

.daily-setting select,
.settings-fields select {
  min-height: 42px;
  padding: 0 34px 0 12px;
  border: 1px solid var(--line);
  border-radius: 12px;
  color: var(--ink);
  background: var(--paper);
  font-weight: 800;
}

.settings-note {
  display: flex;
  margin-bottom: 18px;
  padding: 16px 20px;
  align-items: flex-start;
  gap: 12px;
  border-radius: 18px;
  color: #6e5c35;
  background: var(--yellow-soft);
}

.settings-note p {
  margin: 0;
  font-size: 13px;
  line-height: 1.6;
}

.settings-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.settings-card {
  display: grid;
  padding: 22px;
  gap: 18px;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: var(--paper);
  box-shadow: var(--shadow-small);
  transition: opacity 160ms ease;
}

.settings-card.is-disabled {
  opacity: 0.62;
}

.settings-card-heading {
  display: flex;
  align-items: center;
  gap: 13px;
}

.settings-card-heading > div {
  display: grid;
  gap: 4px;
}

.settings-card-heading strong {
  font-size: 17px;
}

.settings-card-heading small {
  color: var(--muted);
  font-size: 11px;
  line-height: 1.45;
}

.settings-toggle {
  display: flex;
  align-items: center;
  gap: 9px;
  font-size: 12px;
  font-weight: 750;
  cursor: pointer;
}

.settings-toggle input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
}

.settings-toggle > span {
  position: relative;
  width: 40px;
  height: 23px;
  flex: 0 0 auto;
  border-radius: 99px;
  background: #d8d0c8;
  pointer-events: none;
  transition: background 160ms ease;
}

.settings-toggle > span::after {
  position: absolute;
  top: 3px;
  left: 3px;
  width: 17px;
  height: 17px;
  border-radius: 50%;
  background: white;
  box-shadow: 0 2px 5px rgba(47, 41, 53, 0.2);
  content: "";
  transition: transform 160ms ease;
}

.settings-toggle input:checked + span {
  background: var(--teal);
}

.settings-toggle input:checked + span::after {
  transform: translateX(17px);
}

.settings-toggle input:focus-visible + span {
  outline: 4px solid rgba(85, 152, 213, 0.36);
  outline-offset: 3px;
}

.settings-fields {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.settings-fields label {
  display: grid;
  gap: 6px;
}

.fixed-level {
  display: flex;
  min-height: 42px;
  margin: 17px 0 0;
  align-items: center;
  color: var(--muted);
  font-size: 11px;
}

@keyframes float {
  from {
    transform: translateY(-7px) rotate(-8deg);
  }
  to {
    transform: translateY(9px) rotate(8deg);
  }
}

@media (max-width: 900px) {
  .welcome-card {
    padding: 44px;
    grid-template-columns: 1fr 270px;
    gap: 30px;
  }

  .question-layout {
    grid-template-columns: minmax(0, 1.1fr) minmax(300px, 0.9fr);
  }

  .question-card {
    padding: 34px 24px;
  }

  .answer-panel {
    padding: 26px;
  }

  .bridge-visual {
    gap: 7px;
    font-size: 19px;
  }

  .number-bubble {
    width: 51px;
    height: 51px;
    border-radius: 17px;
  }
}

@media (max-width: 720px) {
  .app-shell {
    width: min(100% - 28px, 600px);
  }

  .topbar {
    margin-bottom: 18px;
  }

  .desktop-label {
    display: none;
  }

  .icon-button {
    width: 48px;
    padding: 0;
  }

  .welcome-card {
    min-height: auto;
    padding: 32px 24px 28px;
    grid-template-columns: 1fr;
  }

  .welcome-copy h1 {
    font-size: clamp(34px, 9vw, 44px);
  }

  .daily-card {
    width: 100%;
    margin: 26px 0 0;
  }

  .mascot {
    width: 92px;
    height: 92px;
    margin-top: -70px;
    border-radius: 30px;
  }

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

  .section-heading {
    align-items: start;
    flex-direction: column;
    gap: 6px;
  }

  .grownup-strip {
    align-items: stretch;
    flex-direction: column;
  }

  .practice-shell {
    padding: max(14px, env(safe-area-inset-top)) 14px max(18px, env(safe-area-inset-bottom));
  }

  .practice-header {
    margin-bottom: 14px;
    grid-template-columns: 50px 1fr;
    gap: 12px;
  }

  .session-skill {
    display: none;
  }

  .question-layout {
    min-height: auto;
    grid-template-columns: 1fr;
    gap: 14px;
  }

  .question-card,
  .answer-panel {
    min-height: auto;
    border-radius: 26px;
  }

  .question-card {
    padding: 30px 20px 22px;
  }

  .question-card h1 {
    font-size: clamp(43px, 14vw, 60px);
  }

  .learning-visual {
    min-height: 152px;
    margin: 18px 0 13px;
  }

  .answer-panel {
    padding: 22px 20px;
  }

  .answer-grid {
    margin: 16px 0;
  }

  .answer-button {
    min-height: 76px;
    border-radius: 19px;
    font-size: 29px;
  }

  .feedback {
    min-height: 74px;
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .parent-heading {
    align-items: start;
    flex-direction: column;
  }

  .parent-heading-actions {
    width: 100%;
    align-items: start;
    flex-direction: column;
  }

  .settings-heading {
    align-items: stretch;
    flex-direction: column;
  }

  .daily-setting {
    min-width: 0;
  }

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

@media (max-width: 430px) {
  .brand small {
    display: none;
  }

  .brand strong {
    font-size: 17px;
  }

  .welcome-copy > p:not(.date-label) {
    margin: 14px 0 22px;
    font-size: 15px;
  }

  .primary-button {
    width: 100%;
  }

  .skill-card {
    min-height: 128px;
    padding: 18px;
    gap: 13px;
  }

  .skill-icon {
    width: 50px;
    height: 50px;
  }

  .skill-copy strong {
    font-size: 17px;
  }

  .skill-copy small {
    max-width: 190px;
    font-size: 12px;
  }

  .skill-example {
    display: none;
  }

  .question-card h1 {
    font-size: 43px;
  }

  .question-card h1.compact {
    font-size: 32px;
  }

  .learning-visual {
    min-height: 140px;
  }

  .ten-frame {
    grid-template-columns: repeat(5, 34px);
    gap: 7px;
  }

  .ten-frame i {
    width: 34px;
    height: 34px;
  }

  .bridge-visual {
    gap: 5px;
    font-size: 16px;
  }

  .number-bubble {
    width: 43px;
    height: 43px;
    border-radius: 14px;
  }

  .split-group {
    padding-bottom: 26px;
  }

  .split-group small {
    right: -20px;
    left: -20px;
    font-size: 9px;
  }

  .family-house {
    width: 190px;
  }

  .jump-track {
    gap: 4px;
  }

  .jump-track span {
    min-width: 42px;
    height: 46px;
    padding: 0 5px;
    border-radius: 14px;
    font-size: 17px;
  }

  .jump-track b {
    font-size: 9px;
  }

  .pattern-track {
    gap: 4px;
  }

  .pattern-track span {
    min-width: 40px;
    height: 44px;
    padding: 0 4px;
    border-radius: 13px;
    font-size: 15px;
  }

  .compare-visual {
    gap: 13px;
  }

  .compare-visual span {
    width: 72px;
    height: 72px;
    border-radius: 22px;
    font-size: 26px;
  }

  .sorting-visual span {
    min-width: 48px;
    height: 48px;
    border-radius: 15px;
    font-size: 17px;
  }

  .answer-button.text-answer {
    font-size: 14px;
  }

  .complete-card {
    padding: 34px 22px;
  }

  .parent-heading h1 {
    font-size: 35px;
  }

  .settings-heading h1 {
    font-size: 35px;
  }

  .settings-card {
    padding: 19px 16px;
  }

  .stat-card {
    min-height: 120px;
    padding: 17px;
  }

  .progress-card {
    padding: 23px 18px;
  }

  .skill-progress-copy > div:first-child {
    align-items: start;
    flex-direction: column;
    gap: 3px;
  }
}

@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;
  }
}