*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
:root {
  --mini-primary: #ff5fa1;
  --mini-orange: #ff8a1d;
  --mini-yellow: #ffca3a;
  --mini-green: #2fbf71;
  --mini-sky: #24a8ff;
  --mini-blue: #3b63ff;
  --mini-purple: #8f61ff;
  --mini-ink: #243150;
  --mini-muted: #68758f;
  --mini-line: #ddecff;
  --mini-ok: #2fbf71;
  --mini-bad: #ff595e;
}
html,
body {
  min-height: 100%;
  color: var(--mini-ink);
  font-family: "Zen Maru Gothic", "Yu Gothic", "Meiryo", sans-serif;
  user-select: none;
  -webkit-user-select: none;
  -webkit-tap-highlight-color: transparent;
}
body {
  background:
    radial-gradient(circle at 9% 8%, rgba(255,202,58,.24) 0 78px, transparent 80px),
    radial-gradient(circle at 90% 13%, rgba(36,168,255,.18) 0 92px, transparent 94px),
    radial-gradient(circle at 11% 86%, rgba(255,95,161,.15) 0 86px, transparent 88px),
    linear-gradient(180deg,#fffdf5 0%,#f3fbff 48%,#fff3d9 100%);
}
button,
input,
select { font: inherit; }
[hidden] { display: none !important; }
.learn-page {
  width: min(1080px, 100%);
  margin: 0 auto;
  padding: 22px 16px 58px;
}
.learn-head {
  display: grid;
  grid-template-columns: 132px minmax(0,1fr);
  gap: 18px;
  align-items: center;
  margin: 8px 0 18px;
}
.learn-icon {
  width: 132px;
  aspect-ratio: 1;
  border-radius: 28px;
  border: 5px solid #fff;
  background: #fff;
  object-fit: cover;
  box-shadow: 0 12px 26px rgba(55,78,130,.16);
}
.learn-title {
  font-size: 3.2rem;
  line-height: 1.05;
  font-weight: 900;
  letter-spacing: 0;
}
.rainbow-text {
  color: transparent;
  -webkit-text-fill-color: transparent;
  background: linear-gradient(90deg,#ff595e,#ff9f1c,#ffca3a,#2fbf71,#24a8ff,#8f61ff);
  -webkit-background-clip: text;
  background-clip: text;
  filter: drop-shadow(0 2px 0 rgba(255,255,255,.96));
}
.learn-lead {
  margin-top: 8px;
  color: var(--mini-muted);
  font-size: 1rem;
  font-weight: 800;
  line-height: 1.75;
}
.panel {
  min-width: 0;
  background: rgba(255,255,255,.94);
  border: 4px solid #fff;
  border-radius: 24px;
  box-shadow: 0 14px 32px rgba(55,78,130,.12);
}
/* Grid/flex children must be allowed to shrink on narrow screens. */
.panel * {
  min-width: 0;
}
.toolbar {
  display: grid;
  gap: 12px;
  padding: 16px;
  margin-bottom: 16px;
}
.toolbar-row {
  display: grid;
  grid-template-columns: 110px minmax(0,1fr);
  gap: 12px;
  align-items: center;
}
.toolbar-label {
  color: var(--mini-muted);
  font-size: .88rem;
  font-weight: 900;
}
.segmented,
.button-row {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
.pill-btn,
.primary-btn,
.ghost-btn,
.answer-btn,
.tile-btn {
  border: none;
  cursor: pointer;
  font-weight: 900;
}
.pill-btn {
  min-height: 42px;
  border-radius: 999px;
  padding: 0 16px;
  background: #fff;
  color: var(--mini-ink);
  border: 3px solid #ffe6bf;
  box-shadow: inset 0 -4px 0 rgba(255,202,58,.10);
}
.pill-btn.active {
  color: #fff;
  border-color: transparent;
  background: linear-gradient(135deg,var(--mini-primary),var(--mini-orange));
  box-shadow: 0 6px 0 rgba(202,88,58,.18);
}
.primary-btn,
.ghost-btn {
  min-height: 46px;
  border-radius: 999px;
  padding: 0 20px;
}
.primary-btn {
  color: #fff;
  background: linear-gradient(135deg,var(--mini-primary),var(--mini-orange));
  box-shadow: 0 7px 0 rgba(202,88,58,.20);
}
.ghost-btn {
  color: var(--mini-blue);
  background: #fff;
  border: 3px solid var(--mini-line);
}
.section {
  display: grid;
  gap: 14px;
}
.section-title {
  color: var(--mini-blue);
  font-size: 1.12rem;
  font-weight: 900;
}
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, minmax(0,1fr));
  gap: 14px;
}
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, minmax(0,1fr));
  gap: 12px;
}
.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, minmax(0,1fr));
  gap: 10px;
}
.stat-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0,1fr));
  gap: 10px;
}
.stat {
  min-height: 70px;
  border-radius: 18px;
  background: #fff;
  border: 3px solid var(--mini-line);
  display: grid;
  place-items: center;
  text-align: center;
  font-weight: 900;
}
.stat small {
  display: block;
  color: var(--mini-muted);
  font-size: .74rem;
}
.stat span {
  color: var(--mini-primary);
  font-family: "Fredoka", sans-serif;
  font-size: 1.65rem;
  font-weight: 700;
}
.question-box {
  display: grid;
  gap: 14px;
  padding: 20px;
  border-radius: 22px;
  border: 3px solid var(--mini-line);
  background:
    radial-gradient(circle at 92% 18%, rgba(255,202,58,.20), transparent 24%),
    linear-gradient(180deg,#fff 0%,#f8fcff 100%);
}
.question-title {
  font-size: clamp(1.45rem, 4vw, 2.2rem);
  line-height: 1.35;
  font-weight: 900;
}
.answers {
  display: grid;
  grid-template-columns: repeat(2, minmax(0,1fr));
  gap: 10px;
}
.answer-btn,
.tile-btn {
  min-height: 76px;
  border-radius: 18px;
  padding: 10px 12px;
  background: #fff;
  border: 3px solid var(--mini-line);
  color: var(--mini-ink);
  font-size: 1.05rem;
  line-height: 1.35;
}
.answer-btn.correct {
  border-color: #b9efce;
  background: #effff5;
  color: #167842;
}
.answer-btn.wrong {
  border-color: #ffc2c5;
  background: #fff4f5;
  color: #c9182b;
}
.answer-btn:disabled { cursor: default; }
.feedback {
  min-height: 56px;
  display: grid;
  align-items: center;
  padding: 12px 14px;
  border-radius: 16px;
  background: #fff;
  border: 3px solid var(--mini-line);
  color: var(--mini-muted);
  font-weight: 900;
  line-height: 1.55;
}
.feedback.ok {
  color: #167842;
  border-color: #b9efce;
  background: #f0fff5;
}
.feedback.bad {
  color: #b42332;
  border-color: #ffc2c5;
  background: #fff5f6;
}
.result-box {
  display: grid;
  gap: 12px;
  text-align: center;
  padding: 24px 14px;
}
.score-big {
  font-family: "Fredoka", sans-serif;
  color: var(--mini-primary);
  font-size: 5rem;
  line-height: 1;
  font-weight: 700;
}
.note-box {
  border-radius: 18px;
  padding: 12px 14px;
  background: #f0fff6;
  border: 3px solid #c9f0d8;
  color: #176e3c;
  font-weight: 900;
  line-height: 1.6;
}
.kids-ill {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
  pointer-events: none;
  user-select: none;
  -webkit-user-drag: none;
}
.kids-ill-inline {
  display: inline-block;
  width: 1.45em;
  height: 1.45em;
  object-fit: contain;
  vertical-align: -.35em;
  pointer-events: none;
  user-select: none;
  -webkit-user-drag: none;
}
@media (max-width: 840px) {
  .learn-title { font-size: 2.45rem; }
  .learn-head { grid-template-columns: 92px minmax(0,1fr); gap: 12px; }
  .learn-icon { width: 92px; border-radius: 22px; }
  .toolbar-row { grid-template-columns: 1fr; gap: 8px; }
  .grid-2,
  .grid-3,
  .grid-4 { grid-template-columns: repeat(2, minmax(0,1fr)); }
}
@media (max-width: 560px) {
  .learn-page { padding: 14px 12px 42px; }
  .learn-title { font-size: 2.1rem; }
  .learn-lead { font-size: .92rem; }
  .pill-btn {
    flex: 1 1 calc(50% - 8px);
    padding: 0 10px;
  }
  .toolbar,
  .question-box { padding: 12px; }
  .grid-2,
  .grid-3,
  .grid-4,
  .answers,
  .stat-grid { grid-template-columns: 1fr; }
  .score-big { font-size: 4rem; }
}