:root {
  --ink: #1f2147;
  --muted: #686b91;
  --paper: #fffaf2;
  --line: rgba(31, 33, 71, 0.12);
  --sky: #5ed4ff;
  --mint: #4ee7b0;
  --sun: #ffe45c;
  --coral: #ff6b8f;
  --orange: #ff9d42;
  --violet: #8d5cff;
  --blue: #3478ff;
  --green: #23bf67;
  --shadow: 0 16px 34px rgba(64, 52, 117, 0.18);
  --safe-bottom: max(env(safe-area-inset-bottom), var(--android-inset-bottom, 0px));
}

* {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  overflow-x: hidden;
  color: var(--ink);
  font-family: "Arial Rounded MT Bold", "Noto Sans KR", system-ui, sans-serif;
  background:
    radial-gradient(circle at 8% 8%, rgba(255, 228, 92, 0.88) 0 9%, transparent 10%),
    radial-gradient(circle at 92% 12%, rgba(94, 212, 255, 0.78) 0 11%, transparent 12%),
    linear-gradient(150deg, #83f3b2 0%, #6ed7ff 46%, #ff8cb0 100%);
  min-height: 100vh;
  min-height: 100svh;
}

button,
input {
  font: inherit;
}

button {
  border: 0;
  cursor: pointer;
}

.app-shell {
  width: min(1180px, 100%);
  min-height: 100vh;
  min-height: 100svh;
  margin: 0 auto;
  padding: 18px 18px calc(18px + var(--safe-bottom));
}

.view {
  display: none;
}

.view.active {
  display: grid;
  gap: 16px;
  animation: view-in 160ms ease;
}

@keyframes view-in {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
}

.hero,
.view-head,
.quiz-top,
.today-panel,
.panel,
.quiz-card,
.read-card,
.write-card,
.review-list,
.sticker-shelf,
.settings-grid {
  border: 3px solid rgba(255, 255, 255, 0.72);
  border-radius: 18px;
  background: rgba(255, 250, 242, 0.88);
  box-shadow: var(--shadow);
}

.hero {
  min-height: 210px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 24px;
  background:
    linear-gradient(135deg, rgba(255, 250, 242, 0.92), rgba(255, 228, 92, 0.86)),
    repeating-linear-gradient(90deg, transparent 0 42px, rgba(255, 255, 255, 0.18) 42px 56px);
}

.eyebrow {
  margin: 0 0 6px;
  color: var(--violet);
  font-size: 0.86rem;
  font-weight: 1000;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin: 0;
}

h1 {
  font-size: clamp(2.3rem, 8vw, 4.6rem);
  line-height: 0.98;
}

h2 {
  font-size: clamp(1.45rem, 4vw, 2.35rem);
}

.hero-copy {
  margin-top: 10px;
  color: var(--muted);
  font-size: 1.1rem;
  font-weight: 900;
}

.score-orb {
  width: 132px;
  aspect-ratio: 1;
  display: grid;
  place-items: center;
  color: #fff;
  background: linear-gradient(135deg, var(--violet), var(--coral));
  border: 5px solid #fff;
  border-radius: 999px;
  box-shadow: 0 14px 24px rgba(141, 92, 255, 0.28);
}

.score-orb span,
.today-panel span {
  font-size: 0.9rem;
  font-weight: 900;
}

.score-orb strong {
  font-size: 2.2rem;
}

.menu-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 12px;
}

.menu-card {
  min-height: 150px;
  display: grid;
  align-content: center;
  justify-items: start;
  gap: 12px;
  padding: 18px;
  color: var(--ink);
  border: 4px solid #fff;
  border-radius: 18px;
  text-align: left;
  box-shadow: var(--shadow);
  transition:
    transform 120ms ease,
    box-shadow 120ms ease;
}

.menu-card:active,
.choice-button:active,
.hint-button:active,
.primary-cta:active,
.secondary-cta:active {
  transform: translateY(3px) scale(0.99);
}

.menu-card.ko {
  background: linear-gradient(135deg, #ffec6b, #ff8eb3);
}

.menu-card.en {
  background: linear-gradient(135deg, #69e7ff, #9071ff);
}

.menu-card.review {
  background: linear-gradient(135deg, #6dffba, #ffec6b);
}

.menu-card.stickers {
  background: linear-gradient(135deg, #ff9d42, #ff6b8f);
}

.menu-card.settings {
  background: linear-gradient(135deg, #ffffff, #cdbdff);
}

.menu-icon {
  min-width: 64px;
  min-height: 64px;
  display: inline-grid;
  place-items: center;
  padding: 8px;
  color: #fff;
  background: rgba(31, 33, 71, 0.82);
  border-radius: 16px;
  font-size: 1.55rem;
  font-weight: 1000;
}

.menu-card strong {
  display: block;
  font-size: 1.18rem;
  font-weight: 1000;
}

.menu-card small {
  display: block;
  margin-top: 3px;
  color: rgba(31, 33, 71, 0.72);
  font-weight: 900;
}

.today-panel {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  padding: 12px;
}

.today-panel div {
  min-height: 72px;
  display: grid;
  place-items: center;
  gap: 4px;
  border-radius: 14px;
  background: #fff;
}

.today-panel strong {
  color: var(--violet);
  font-size: 1.8rem;
}

.view-head,
.quiz-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px;
}

.back-button,
.sound-button,
.setting-button,
.danger-button {
  min-height: 44px;
  padding: 10px 14px;
  border-radius: 12px;
  color: var(--ink);
  background: #fff;
  border: 2px solid var(--line);
  font-weight: 1000;
}

.setup-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.4fr;
  gap: 14px;
}

.panel {
  display: grid;
  gap: 12px;
  padding: 16px;
}

.level-buttons,
.topic-buttons {
  display: grid;
  gap: 8px;
}

.level-buttons {
  grid-template-columns: repeat(5, 1fr);
}

.topic-buttons {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.chip-button {
  min-height: 52px;
  padding: 10px;
  color: var(--ink);
  background: #fff;
  border: 3px solid transparent;
  border-radius: 14px;
  font-weight: 1000;
  box-shadow: 0 8px 16px rgba(64, 52, 117, 0.1);
}

.chip-button.active {
  color: #fff;
  background: var(--violet);
  border-color: #fff;
}

.primary-cta,
.secondary-cta {
  min-height: 52px;
  padding: 12px 18px;
  border-radius: 14px;
  font-weight: 1000;
  box-shadow: 0 10px 18px rgba(64, 52, 117, 0.16);
}

.primary-cta {
  color: #fff;
  background: linear-gradient(135deg, var(--violet), var(--blue));
}

.secondary-cta {
  color: var(--ink);
  background: var(--sun);
}

.score-strip {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 8px;
}

.score-strip span {
  min-height: 40px;
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 8px 12px;
  background: #fff;
  border-radius: 999px;
  font-weight: 1000;
}

.score-strip b {
  color: var(--coral);
}

.quiz-card,
.read-card,
.write-card {
  min-width: 0;
  overflow: hidden;
  display: grid;
  gap: 14px;
  padding: 18px;
}

.quiz-card > *,
.read-card > *,
.write-card > * {
  min-width: 0;
  max-width: 100%;
}

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

.topic-badge {
  display: inline-flex;
  align-items: center;
  min-height: 42px;
  padding: 9px 13px;
  color: #fff;
  background: var(--green);
  border-radius: 999px;
  font-weight: 1000;
}

#promptText {
  font-size: clamp(1.6rem, 5vw, 3.35rem);
  line-height: 1.12;
}

.encourage {
  color: var(--muted);
  font-size: 1.02rem;
  font-weight: 1000;
}

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

.hint-button {
  min-height: 52px;
  padding: 10px;
  color: var(--ink);
  background: linear-gradient(135deg, #fff, #fff1a6);
  border: 3px solid #fff;
  border-radius: 14px;
  font-weight: 1000;
}

.hint-button.image {
  background: linear-gradient(135deg, #fff, #a7edff);
}

.hint-button:disabled {
  cursor: not-allowed;
  opacity: 0.5;
}

.hint-output {
  min-height: 48px;
  display: grid;
  align-items: center;
  padding: 12px;
  color: var(--ink);
  background: rgba(255, 255, 255, 0.76);
  border: 2px dashed rgba(141, 92, 255, 0.42);
  border-radius: 14px;
  font-weight: 1000;
}

.image-hint {
  display: none;
  min-height: 160px;
  overflow: hidden;
  border: 3px solid #fff;
  border-radius: 18px;
  background: linear-gradient(135deg, #bff7ff, #fff59a);
}

.image-hint.active {
  display: grid;
  place-items: center;
}

.image-hint svg {
  width: min(100%, 360px);
  height: 160px;
}

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

.choice-button {
  min-height: 92px;
  padding: 16px;
  color: var(--ink);
  background: #fff;
  border: 4px solid #fff;
  border-radius: 18px;
  font-size: clamp(1.3rem, 4vw, 2.4rem);
  font-weight: 1000;
  box-shadow: 0 12px 20px rgba(64, 52, 117, 0.12);
}

.choice-button:nth-child(1) {
  background: #ffe45c;
}

.choice-button:nth-child(2) {
  background: #69e7ff;
}

.choice-button:nth-child(3) {
  background: #ff8eb3;
}

.choice-button:nth-child(4) {
  background: #73f4b6;
}

.choice-button.correct {
  outline: 5px solid var(--green);
}

.choice-button.wrong {
  outline: 5px solid var(--coral);
}

.hidden {
  display: none !important;
}

.read-card {
  text-align: center;
}

#answerWord {
  display: block;
  color: var(--coral);
  font-size: clamp(4rem, 18vw, 8rem);
  line-height: 0.95;
  text-shadow: 0 8px 0 rgba(255, 228, 92, 0.72);
}

.answer-parts {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
}

.answer-parts span {
  min-width: 52px;
  min-height: 48px;
  display: inline-grid;
  place-items: center;
  padding: 8px;
  color: #fff;
  background: var(--violet);
  border-radius: 14px;
  font-size: 1.4rem;
  font-weight: 1000;
}

.trace-wrap {
  position: relative;
  width: min(100%, 680px);
  aspect-ratio: 2.4 / 1;
  justify-self: center;
  overflow: hidden;
  background: #fff;
  border: 4px solid var(--violet);
  border-radius: 20px;
  touch-action: none;
}

.trace-wrap canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.write-input {
  display: grid;
  gap: 7px;
  font-weight: 1000;
}

.write-input input {
  min-height: 56px;
  padding: 12px 14px;
  color: var(--ink);
  background: #fff;
  border: 3px solid var(--line);
  border-radius: 14px;
  font-size: 1.4rem;
  font-weight: 1000;
}

.write-actions {
  display: grid;
  grid-template-columns: 0.7fr 1fr;
  gap: 10px;
}

.review-list,
.sticker-shelf,
.settings-grid {
  min-height: 220px;
  align-content: start;
  gap: 10px;
  padding: 16px;
}

.review-list,
.sticker-shelf {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.review-card,
.sticker-card {
  display: grid;
  gap: 6px;
  padding: 14px;
  background: #fff;
  border-radius: 14px;
  font-weight: 1000;
}

.sticker-card strong {
  font-size: 1.4rem;
}

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

.volume-control {
  display: grid;
  align-content: center;
  gap: 6px;
  padding: 12px;
  background: #fff;
  border-radius: 14px;
  font-weight: 1000;
}

.danger-button {
  color: #fff;
  background: var(--coral);
}

.celebrate {
  animation: celebrate 520ms ease;
}

@keyframes celebrate {
  0%,
  100% {
    transform: scale(1);
  }
  45% {
    transform: scale(1.035) rotate(-1deg);
  }
  70% {
    transform: scale(1.02) rotate(1deg);
  }
}

@media (max-width: 900px) {
  .menu-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .topic-buttons {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

@media (max-width: 640px) {
  .app-shell {
    padding: 12px 12px calc(12px + var(--safe-bottom));
  }

  .hero {
    min-height: 178px;
    padding: 18px;
  }

  .score-orb {
    width: 96px;
  }

  .menu-grid,
  .today-panel,
  .choice-grid,
  .hint-row,
  .settings-grid,
  .write-actions {
    grid-template-columns: 1fr;
  }

  .menu-card {
    min-height: 112px;
    grid-template-columns: auto minmax(0, 1fr);
    align-items: center;
  }

  .level-buttons {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }

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

  .quiz-top,
  .view-head {
    align-items: stretch;
    flex-direction: column;
  }

  .score-strip {
    justify-content: stretch;
  }

  .score-strip span {
    flex: 1 1 auto;
    justify-content: center;
  }

  .choice-button {
    min-height: 72px;
  }

  .trace-wrap {
    aspect-ratio: 1.55 / 1;
  }
}

@media (orientation: landscape) and (max-height: 520px) {
  .app-shell {
    padding: 8px 12px calc(8px + var(--safe-bottom));
  }

  .view-quiz.active {
    grid-template-columns: minmax(300px, 0.8fr) minmax(0, 1fr);
    grid-template-areas:
      "top top"
      "card card";
    gap: 8px;
  }

  .quiz-top {
    grid-area: top;
    padding: 8px;
  }

  .quiz-card,
  .read-card,
  .write-card {
    grid-area: card;
    padding: 10px;
    gap: 8px;
  }

  #promptText {
    font-size: 1.45rem;
  }

  .hint-row,
  .choice-grid {
    gap: 7px;
  }

  .choice-button {
    min-height: 58px;
    padding: 9px;
    font-size: 1.22rem;
  }

  .image-hint {
    min-height: 110px;
  }

  .trace-wrap {
    width: min(100%, 560px);
    aspect-ratio: 3 / 1;
  }
}