:root {
  color-scheme: light;
  --bg: #fff7e8;
  --ink: #25314d;
  --muted: #667085;
  --paper: #ffffff;
  --line: #e8d9bd;
  --sun: #ffcf5c;
  --coral: #ff6b6b;
  --mint: #4ecdc4;
  --sky: #68a7ff;
  --leaf: #6abf69;
  --shadow: 0 18px 45px rgba(50, 45, 28, 0.16);
  --radius: 24px;
}

* {
  box-sizing: border-box;
}

html {
  min-height: 100%;
}

body {
  min-height: 100vh;
  margin: 0;
  display: grid;
  place-items: center;
  padding: 24px;
  color: var(--ink);
  font-family: "Arial Rounded MT Bold", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  background:
    radial-gradient(circle at 18% 16%, rgba(255, 207, 92, 0.42), transparent 24%),
    radial-gradient(circle at 82% 20%, rgba(104, 167, 255, 0.34), transparent 24%),
    linear-gradient(135deg, #fff7e8 0%, #e8fbff 48%, #fff0f5 100%);
}

button {
  font: inherit;
}

[hidden] {
  display: none !important;
}

.game-shell {
  width: min(1080px, 100%);
  min-height: min(720px, calc(100vh - 48px));
  position: relative;
  overflow: hidden;
  border: 3px solid rgba(37, 49, 77, 0.08);
  border-radius: 36px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.92), rgba(255, 255, 255, 0.82)),
    repeating-linear-gradient(90deg, rgba(255, 207, 92, 0.12) 0 20px, transparent 20px 44px);
  box-shadow: var(--shadow);
}

.screen {
  display: none;
  min-height: inherit;
  padding: clamp(22px, 4vw, 48px);
}

.screen.is-active {
  display: flex;
}

.start-screen,
.level-screen,
.mistakes-empty-screen,
.done-screen {
  align-items: center;
  justify-content: center;
  flex-direction: column;
  text-align: center;
  gap: 22px;
}

.brand-row {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 10px 16px;
  border: 2px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.8);
  color: #7b5b10;
}

.planet-badge,
.celebration-mark {
  color: #e7a800;
  text-shadow: 0 2px 0 rgba(255, 255, 255, 0.9);
}

h1,
h2,
p {
  margin: 0;
}

h1 {
  max-width: 760px;
  font-size: clamp(42px, 8vw, 84px);
  line-height: 1.05;
}

h2 {
  font-size: clamp(30px, 5vw, 54px);
  line-height: 1.08;
}

.start-copy,
.level-screen p,
.mistakes-empty-screen p,
.done-screen p {
  max-width: 640px;
  color: var(--muted);
  font-size: clamp(18px, 2.6vw, 26px);
  line-height: 1.45;
}

.reward-card {
  width: min(520px, 100%);
  min-height: 178px;
  display: grid;
  justify-items: center;
  gap: 10px;
  padding: 22px;
  border: 3px solid rgba(231, 168, 0, 0.28);
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.86);
  box-shadow: 0 16px 36px rgba(37, 49, 77, 0.12);
}

.reward-card.is-rolling {
  animation: reward-pop 180ms ease-in-out infinite alternate;
}

.reward-card.is-drawn {
  border-color: rgba(47, 168, 107, 0.4);
  background: rgba(239, 255, 246, 0.94);
}

.reward-icon {
  font-size: clamp(48px, 9vw, 76px);
  line-height: 1;
}

.reward-card strong {
  color: var(--ink);
  font-size: clamp(24px, 4vw, 38px);
}

.reward-card em {
  max-width: 420px;
  color: var(--muted);
  font-style: normal;
  font-size: clamp(16px, 2vw, 20px);
  line-height: 1.35;
}

.level-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 14px;
}

.primary-button,
.secondary-button,
.small-button,
.speaker-button,
.choice-card {
  border: 0;
  cursor: pointer;
  transition: transform 160ms ease, box-shadow 160ms ease, filter 160ms ease;
}

.primary-button {
  min-width: min(320px, 100%);
  min-height: 76px;
  padding: 18px 28px;
  border-radius: 24px;
  background: linear-gradient(135deg, var(--coral), #ff9f1c);
  color: #fff;
  font-size: clamp(24px, 4vw, 34px);
  box-shadow: 0 12px 0 #cb5a1d, 0 22px 35px rgba(255, 107, 107, 0.28);
}

.start-actions {
  width: min(900px, 100%);
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 14px;
  align-items: stretch;
}

.secondary-button,
.small-button {
  border: 2px solid rgba(37, 49, 77, 0.12);
  background: rgba(255, 255, 255, 0.9);
  color: var(--ink);
  box-shadow: 0 8px 0 rgba(37, 49, 77, 0.12);
}

.secondary-button {
  min-height: 76px;
  padding: 16px 20px;
  border-radius: 24px;
  font-size: clamp(18px, 2.4vw, 26px);
}

.small-button {
  min-height: 54px;
  padding: 12px 18px;
  border-radius: 18px;
  font-size: 18px;
}

.primary-button:hover,
.primary-button:focus-visible,
.secondary-button:hover,
.secondary-button:focus-visible,
.small-button:hover,
.small-button:focus-visible,
.speaker-button:hover,
.speaker-button:focus-visible,
.choice-card:hover,
.choice-card:focus-visible {
  transform: translateY(-4px);
  filter: saturate(1.08);
}

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

.primary-button:disabled,
.secondary-button:disabled {
  cursor: not-allowed;
  filter: grayscale(0.25) opacity(0.68);
  transform: none;
  box-shadow: 0 8px 0 rgba(37, 49, 77, 0.08);
}

.mini-map {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  max-width: 640px;
}

.mini-map span {
  padding: 10px 16px;
  border-radius: 999px;
  background: #fff;
  border: 2px solid var(--line);
  color: #5d6680;
}

.play-screen {
  flex-direction: column;
  gap: clamp(18px, 3vw, 28px);
}

.game-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.eyebrow,
.prompt-kicker {
  color: #7a6a49;
  font-size: clamp(16px, 2vw, 22px);
}

.star-counter {
  min-width: 132px;
  min-height: 72px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  border-radius: 22px;
  background: #fff6c7;
  color: #9a6a00;
  border: 2px solid #f4d35e;
  font-size: clamp(24px, 4vw, 36px);
}

.progress-track {
  height: 20px;
  overflow: hidden;
  border-radius: 999px;
  background: rgba(37, 49, 77, 0.08);
}

.progress-fill {
  width: 0%;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--mint), var(--leaf));
  transition: width 220ms ease;
}

.prompt-panel {
  display: grid;
  justify-items: center;
  gap: 14px;
  padding: clamp(18px, 4vw, 34px);
  border-radius: 28px;
  background: rgba(255, 255, 255, 0.72);
  border: 2px solid rgba(37, 49, 77, 0.08);
}

.speaker-button {
  min-height: 88px;
  min-width: min(420px, 100%);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  padding: 20px 28px;
  border-radius: 28px;
  background: linear-gradient(135deg, var(--sky), var(--mint));
  color: #fff;
  font-size: clamp(28px, 6vw, 52px);
  box-shadow: 0 12px 0 #2f8ba6, 0 20px 32px rgba(47, 139, 166, 0.24);
}

.choices-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(14px, 3vw, 24px);
}

.choice-card {
  min-height: clamp(180px, 28vw, 260px);
  display: grid;
  align-content: center;
  justify-items: center;
  gap: 10px;
  padding: clamp(16px, 3vw, 26px);
  border-radius: var(--radius);
  background: var(--paper);
  border: 4px solid rgba(37, 49, 77, 0.08);
  box-shadow: 0 12px 26px rgba(37, 49, 77, 0.12);
}

.choice-card.is-correct {
  outline: 6px solid rgba(78, 205, 196, 0.45);
}

.choice-card.is-wrong {
  animation: soft-shake 260ms ease;
}

.choice-icon {
  width: min(122px, 28vw);
  aspect-ratio: 1;
  display: grid;
  place-items: center;
  border-radius: 50%;
  color: #fff;
  font-size: clamp(54px, 10vw, 84px);
}

.choice-label {
  font-size: clamp(22px, 4vw, 34px);
}

.feedback {
  min-height: 42px;
  text-align: center;
  color: #5b6478;
  font-size: clamp(18px, 3vw, 28px);
}

.celebration-mark {
  font-size: clamp(70px, 14vw, 130px);
}

.scan-screen,
.levels-screen,
.words-screen,
.video-screen,
.cards-screen {
  flex-direction: column;
  gap: clamp(18px, 3vw, 28px);
}

.levels-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(14px, 2.4vw, 22px);
}

.level-card {
  min-height: 132px;
  display: grid;
  align-content: center;
  justify-items: start;
  gap: 8px;
  padding: 20px;
  border: 3px solid rgba(37, 49, 77, 0.1);
  border-radius: 22px;
  background: rgba(255, 255, 255, 0.9);
  color: var(--ink);
  box-shadow: 0 10px 24px rgba(37, 49, 77, 0.1);
  cursor: pointer;
  text-align: left;
  transition: transform 160ms ease, filter 160ms ease;
}

.level-card:hover,
.level-card:focus-visible {
  transform: translateY(-4px);
  filter: saturate(1.08);
}

.level-card strong {
  font-size: clamp(24px, 3vw, 34px);
}

.level-card span {
  color: var(--muted);
  font-size: clamp(16px, 2vw, 20px);
}

.level-card em {
  font-style: normal;
  color: #4c5f7f;
  font-size: clamp(14px, 1.7vw, 18px);
}

.level-card.is-completed {
  border-color: rgba(47, 168, 107, 0.38);
  background: rgba(239, 255, 246, 0.92);
}

.level-card.has-weak-words {
  box-shadow: 0 10px 24px rgba(255, 159, 28, 0.18);
}

.word-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.word-tab {
  min-height: 50px;
  padding: 10px 16px;
  border: 2px solid rgba(37, 49, 77, 0.12);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.9);
  color: var(--ink);
  cursor: pointer;
}

.word-tab.is-active {
  background: var(--ink);
  color: #fff;
}

.word-list-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.word-list-card {
  min-height: 150px;
  display: grid;
  align-content: center;
  justify-items: center;
  gap: 8px;
  padding: 16px;
  border: 3px solid rgba(37, 49, 77, 0.1);
  border-radius: 22px;
  background: rgba(255, 255, 255, 0.92);
  color: var(--ink);
  cursor: pointer;
  box-shadow: 0 10px 22px rgba(37, 49, 77, 0.1);
}

.word-list-icon {
  width: 76px;
  aspect-ratio: 1;
  display: grid;
  place-items: center;
  border-radius: 50%;
  color: #fff;
  font-size: 42px;
}

.word-list-word {
  font-size: clamp(22px, 3vw, 30px);
}

.word-list-label {
  color: var(--muted);
  font-size: 18px;
}

.video-stage {
  min-height: 390px;
  position: relative;
  display: grid;
  place-items: center;
  overflow: hidden;
  border-radius: 30px;
  border: 3px solid rgba(37, 49, 77, 0.1);
  background:
    radial-gradient(circle at 30% 20%, rgba(255, 207, 92, 0.36), transparent 28%),
    radial-gradient(circle at 80% 70%, rgba(78, 205, 196, 0.28), transparent 30%),
    rgba(255, 255, 255, 0.74);
}

.video-orbit {
  width: min(520px, 78vw);
  aspect-ratio: 1;
  position: absolute;
  border-radius: 50%;
  border: 5px dashed rgba(37, 49, 77, 0.13);
  animation: spin-orbit 18s linear infinite;
}

.video-card {
  width: min(360px, 82vw);
  min-height: 260px;
  display: grid;
  place-items: center;
  gap: 8px;
  padding: 28px;
  border-radius: 30px;
  color: #fff;
  box-shadow: 0 22px 45px rgba(37, 49, 77, 0.18);
  animation: video-pop 900ms ease both;
}

#video-icon {
  font-size: clamp(76px, 16vw, 130px);
}

#video-word {
  font-size: clamp(34px, 7vw, 58px);
}

#video-label {
  font-style: normal;
  font-size: clamp(22px, 4vw, 34px);
}

.video-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  justify-content: center;
}

.video-caption {
  min-height: 38px;
  text-align: center;
  color: var(--muted);
  font-size: clamp(20px, 3vw, 30px);
}

@keyframes spin-orbit {
  to {
    transform: rotate(360deg);
  }
}

@keyframes video-pop {
  from {
    opacity: 0;
    transform: translateY(18px) scale(0.9);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

@keyframes reward-pop {
  from {
    transform: translateY(0) scale(1);
  }
  to {
    transform: translateY(-4px) scale(1.02);
  }
}

.header-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.scanner-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(280px, 0.75fr);
  gap: clamp(18px, 3vw, 28px);
  align-items: stretch;
}

.camera-stage {
  min-height: 420px;
  position: relative;
  overflow: hidden;
  border-radius: 28px;
  border: 4px solid rgba(37, 49, 77, 0.1);
  background: #25314d;
}

#camera-video {
  width: 100%;
  height: 100%;
  min-height: 420px;
  display: block;
  object-fit: cover;
}

#scan-canvas {
  display: none;
}

.scan-frame {
  width: min(54vw, 330px);
  aspect-ratio: 1;
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  border: 8px solid rgba(255, 255, 255, 0.92);
  border-radius: 30px;
  box-shadow: 0 0 0 999px rgba(20, 28, 48, 0.24);
}

.scan-panel {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 18px;
  padding: clamp(18px, 3vw, 28px);
  border-radius: 28px;
  background: rgba(255, 255, 255, 0.82);
  border: 2px solid rgba(37, 49, 77, 0.08);
}

.scan-status {
  color: var(--muted);
  font-size: clamp(18px, 2.3vw, 24px);
  line-height: 1.45;
}

.scan-result {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px;
  border-radius: 24px;
  background: #fff;
  border: 2px solid var(--line);
}

.result-icon {
  width: 82px;
  aspect-ratio: 1;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--sun);
  font-size: 44px;
}

#scan-result-word {
  color: var(--ink);
  font-size: 32px;
}

#scan-result-label {
  color: var(--muted);
  font-size: 22px;
}

.print-note {
  padding: 14px 18px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.74);
  color: var(--muted);
  font-size: 18px;
}

.cards-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.print-card {
  min-height: 260px;
  display: grid;
  grid-template-rows: 1fr auto auto;
  gap: 8px;
  justify-items: center;
  align-items: center;
  padding: 18px;
  border: 3px solid rgba(37, 49, 77, 0.18);
  border-radius: 20px;
  background: #fff;
  break-inside: avoid;
}

.print-card-art {
  width: 128px;
  aspect-ratio: 1;
  display: grid;
  place-items: center;
  border-radius: 50%;
  color: #fff;
  font-size: 72px;
}

.print-card-word {
  font-size: 34px;
  color: var(--ink);
}

.print-card-label {
  font-size: 22px;
  color: var(--muted);
}

@keyframes soft-shake {
  0%,
  100% {
    transform: translateX(0);
  }
  35% {
    transform: translateX(-8px);
  }
  70% {
    transform: translateX(8px);
  }
}

@media (max-width: 760px) {
  body {
    padding: 12px;
  }

  .game-shell {
    min-height: calc(100vh - 24px);
    border-radius: 24px;
  }

  .game-header {
    align-items: flex-start;
  }

  .start-actions,
  .scanner-layout,
  .levels-grid,
  .word-list-grid,
  .cards-grid {
    grid-template-columns: 1fr;
  }

  .camera-stage,
  #camera-video {
    min-height: 360px;
  }

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

  .choice-card {
    min-height: 148px;
    grid-template-columns: auto 1fr;
    align-content: center;
    justify-items: start;
    text-align: left;
  }

  .choice-icon {
    width: 92px;
  }
}

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

@media print {
  body {
    display: block;
    min-height: auto;
    padding: 0;
    background: #fff;
  }

  .game-shell {
    width: 100%;
    min-height: auto;
    border: 0;
    border-radius: 0;
    box-shadow: none;
    background: #fff;
  }

  .screen {
    display: none !important;
    min-height: auto;
    padding: 0;
  }

  .cards-screen.is-active {
    display: flex !important;
  }

  .print-hidden {
    display: none !important;
  }

  .cards-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 12mm;
  }

  .print-card {
    min-height: 118mm;
    border: 1.5mm solid #222;
    border-radius: 7mm;
  }
}

.login-screen {
  justify-content: center;
  background:
    radial-gradient(circle at 16% 14%, rgba(255, 214, 112, 0.34), transparent 28%),
    radial-gradient(circle at 85% 18%, rgba(80, 200, 180, 0.22), transparent 26%),
    linear-gradient(180deg, #f8fafc 0%, #eef6ff 52%, #fff7ef 100%);
}

.login-card {
  width: min(460px, 100%);
  margin: auto;
  padding: clamp(28px, 5vw, 44px);
  border: 1px solid rgba(255, 255, 255, 0.76);
  border-radius: 32px;
  background: rgba(255, 255, 255, 0.78);
  box-shadow: 0 28px 70px rgba(15, 23, 42, 0.14);
  text-align: center;
  backdrop-filter: blur(22px);
}

.login-logo {
  width: 116px;
  height: 116px;
  border-radius: 30px;
  object-fit: cover;
  box-shadow: 0 16px 36px rgba(31, 41, 55, 0.16);
}

.login-eyebrow {
  margin: 20px 0 8px;
  color: #64748b;
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0;
  text-transform: uppercase;
}

.login-screen h1 {
  margin: 0;
  color: #111827;
  font-size: clamp(2.2rem, 6vw, 3.55rem);
  line-height: 0.98;
  letter-spacing: 0;
}

.login-subtitle {
  margin: 14px auto 0;
  color: #475569;
  font-size: clamp(1.05rem, 2.4vw, 1.25rem);
  font-weight: 800;
}

.login-screen .feedback {
  min-height: 24px;
  margin: 16px 0 0;
}

.login-screen .primary-button {
  min-height: 58px;
  border-radius: 18px;
  background: #111827;
  box-shadow: 0 14px 28px rgba(17, 24, 39, 0.18);
}

.login-screen .primary-button:hover {
  transform: translateY(-1px);
  background: #0f172a;
}

.login-form {
  display: grid;
  gap: 14px;
  width: min(420px, 100%);
  margin: 22px auto 0;
}

.login-form label {
  display: grid;
  gap: 8px;
  color: #4b5563;
  font-weight: 800;
  text-align: left;
}

.login-form input {
  min-height: 52px;
  border: 2px solid #f2c15d;
  border-radius: 8px;
  padding: 0 14px;
  font: inherit;
  background: #fffdf7;
}

.login-screen .login-form {
  gap: 16px;
  margin-top: 28px;
}

.login-screen .login-form label {
  gap: 9px;
  color: #334155;
  font-size: 0.95rem;
}

.login-screen .login-form input {
  min-height: 56px;
  border: 1px solid #d7dee8;
  border-radius: 16px;
  background: rgba(248, 250, 252, 0.9);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.9);
}

.login-screen .login-form input:focus {
  border-color: #2563eb;
  outline: 4px solid rgba(37, 99, 235, 0.12);
}

.admin-shell {
  min-height: 100vh;
  padding: 24px;
  background: #fff7e8;
}

.admin-panel {
  width: min(1080px, 100%);
  margin: 0 auto;
}

.admin-form {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  align-items: end;
  margin: 18px 0;
}

.admin-form label {
  display: grid;
  gap: 6px;
  font-weight: 800;
}

.admin-form input,
.invite-text {
  border: 2px solid #f2c15d;
  border-radius: 8px;
  padding: 12px;
  font: inherit;
}

.invite-text {
  width: 100%;
  min-height: 96px;
  resize: vertical;
  background: #fffdf7;
}

.admin-users-list {
  display: grid;
  gap: 12px;
  margin-top: 18px;
}

.admin-user-card {
  display: grid;
  gap: 8px;
  padding: 16px;
  border: 2px solid #f2c15d;
  border-radius: 8px;
  background: white;
}

.admin-device-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}