:root {
  --ink: #18332f;
  --muted: #667774;
  --paper: #f3f7f4;
  --surface: #fff;
  --line: #d8e2dd;
  --green: #23866f;
  --green-dark: #175f50;
  --mint: #dff4ec;
  --coral: #df6249;
  --coral-soft: #fff0ec;
  --gold: #d79a1d;
  --gold-soft: #fff5d9;
  --blue: #3578b7;
  --blue-soft: #eaf3fc;
  --purple: #7557a5;
  --shadow: 0 12px 30px rgba(24, 51, 47, 0.1);
  --header: 66px;
  --radius: 7px;
  --font: Inter, "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
}
.review-filters {
  display: flex;
  flex-wrap: wrap;
  align-items: end;
  gap: 12px;
  margin: 18px 0 22px;
}
.review-filters label {
  display: grid;
  gap: 6px;
  min-width: 150px;
  color: var(--muted);
  font-size: .82rem;
  font-weight: 700;
}
.challenge-practice { max-width: 760px; margin: 0 auto; }
.level-node { position: relative; }
.level-node small { position: absolute; top: -10px; right: -9px; font-size: .62rem; color: var(--gold); }
@media (max-width: 520px) {
  .review-filters { align-items: stretch; }
  .review-filters label { min-width: 0; flex: 1 1 140px; }
  .review-filters .btn { flex: 1 1 100%; }
}
* {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
}
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font);
  letter-spacing: 0;
}
a {
  color: inherit;
  text-decoration: none;
}
button,
input,
select,
textarea {
  font: inherit;
  letter-spacing: 0;
}
button,
a {
  transition:
    background-color 0.2s,
    color 0.2s,
    border-color 0.2s,
    transform 0.2s;
}
button:focus-visible,
a:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: 3px solid rgba(53, 120, 183, 0.36);
  outline-offset: 2px;
}
svg {
  width: 18px;
  height: 18px;
}
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header);
  background: #173d36;
  color: #fff;
  border-bottom: 3px solid #e4ad32;
}
.nav-shell {
  height: 100%;
  display: flex;
  align-items: center;
  gap: 15px;
  max-width: 1500px;
  margin: auto;
  padding: 0 18px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 9px;
  flex: none;
}
.brand-symbol {
  position: relative;
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border: 1px solid rgba(255, 255, 255, 0.4);
  background: #fff;
  color: #173d36;
}
.brand-symbol b {
  font-size: 0.76rem;
}
.brand-symbol i {
  position: absolute;
  right: 3px;
  bottom: 3px;
  width: 7px;
  height: 7px;
  background: var(--coral);
}
.brand strong,
.brand small {
  display: block;
}
.brand strong {
  font-size: 0.88rem;
}
.brand small {
  margin-top: 2px;
  color: rgba(255, 255, 255, 0.62);
  font-size: 0.48rem;
}
.primary-nav {
  display: flex;
  align-items: center;
  gap: 2px;
  min-width: 0;
}
.primary-nav a {
  display: flex;
  align-items: center;
  gap: 5px;
  height: 40px;
  padding: 0 8px;
  color: rgba(255, 255, 255, 0.75);
  font-size: 0.7rem;
  font-weight: 700;
  white-space: nowrap;
}
.primary-nav a:hover,
.primary-nav a.active {
  background: rgba(255, 255, 255, 0.11);
  color: #fff;
}
.header-user {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-left: auto;
}
.level-chip {
  display: grid;
  height: 38px;
  padding: 4px 9px;
  background: rgba(255, 255, 255, 0.1);
}
.level-chip span {
  font-size: 0.65rem;
  color: #f3c75e;
}
.level-chip b {
  font-size: 0.58rem;
}
.avatar-link {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  background: #fff;
  color: #173d36;
  border-radius: 50%;
  font-weight: 900;
}
.icon-btn {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  background: transparent;
  color: inherit;
  cursor: pointer;
}
.icon-btn-light {
  display: inline-grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--green-dark);
  cursor: pointer;
}
.icon-btn-light:hover,
.speak-btn.speaking {
  border-color: var(--green);
  background: var(--mint);
  color: var(--green-dark);
}
.nav-toggle {
  display: none;
}
.login-link,
.register-link {
  display: grid;
  place-items: center;
  height: 36px;
  padding: 0 12px;
  font-size: 0.72rem;
  font-weight: 800;
}
.login-link {
  border: 1px solid rgba(255, 255, 255, 0.45);
}
.register-link {
  background: #f1bc45;
  color: #2b332d;
}
.page-shell {
  width: min(1240px, 100%);
  margin: auto;
  padding: 30px 20px 58px;
}
.page-heading {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 22px;
}
.page-heading h1 {
  margin: 4px 0 8px;
  font-size: clamp(1.7rem, 3vw, 2.45rem);
  line-height: 1.15;
}
.page-heading p {
  max-width: 760px;
  margin: 0;
  color: var(--muted);
  line-height: 1.7;
}
.eyebrow {
  margin: 0;
  color: var(--coral) !important;
  font-size: 0.66rem !important;
  font-weight: 900;
  letter-spacing: 0.08em !important;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  min-height: 40px;
  padding: 0 14px;
  border: 1px solid transparent;
  border-radius: 5px;
  font-size: 0.74rem;
  font-weight: 800;
  cursor: pointer;
}
.btn-primary {
  background: var(--green);
  color: #fff;
}
.btn-primary:hover {
  background: var(--green-dark);
}
.btn-coral {
  background: var(--coral);
  color: #fff;
}
.btn-outline {
  border-color: #9aaca7;
  background: #fff;
  color: var(--ink);
}
.btn-soft {
  background: var(--mint);
  color: var(--green-dark);
}
.btn-sm {
  min-height: 32px;
  padding: 0 9px;
  font-size: 0.66rem;
}
.page-actions,
.row-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.flash {
  width: min(1200px, calc(100% - 24px));
  margin: 12px auto 0;
  padding: 11px 14px;
  border-left: 4px solid var(--blue);
  background: #fff;
  font-size: 0.78rem;
}
.flash-success {
  border-color: var(--green);
  background: var(--mint);
}
.flash-error {
  border-color: var(--coral);
  background: var(--coral-soft);
}
.metric-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border: 1px solid var(--line);
  background: var(--line);
  gap: 1px;
}
.metric {
  padding: 15px;
  background: #fff;
}
.metric b,
.metric span {
  display: block;
}
.metric b {
  font-size: 1.35rem;
}
.metric span {
  margin-top: 3px;
  color: var(--muted);
  font-size: 0.68rem;
}
.card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  box-shadow: 0 2px 0 rgba(24, 51, 47, 0.03);
}
.section-title {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 12px;
}
.section-title h2 {
  margin: 0;
  font-size: 1.15rem;
}
.section-title p {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 0.74rem;
}
.tag,
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 7px;
  border-radius: 3px;
  background: #edf2f0;
  color: #4d615d;
  font-size: 0.62rem;
  font-weight: 800;
}
.tag-green {
  background: var(--mint);
  color: var(--green-dark);
}
.tag-coral {
  background: var(--coral-soft);
  color: #9c3f2d;
}
.tag-gold {
  background: var(--gold-soft);
  color: #825b08;
}
.tag-blue {
  background: var(--blue-soft);
  color: #255c8e;
}
.hero-workspace {
  position: relative;
  overflow: hidden;
  min-height: 440px;
  background: #183b35;
  color: #fff;
}
.hero-workspace > img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.18;
}
.hero-workspace-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(340px, 0.8fr);
  gap: 42px;
  align-items: center;
  width: min(1240px, 100%);
  min-height: 440px;
  margin: auto;
  padding: 48px 20px;
}
.hero-copy h1 {
  max-width: 750px;
  margin: 8px 0 15px;
  font-size: clamp(2.25rem, 5vw, 4.4rem);
  line-height: 1;
}
.hero-copy p {
  max-width: 680px;
  color: rgba(255, 255, 255, 0.75);
  line-height: 1.75;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  margin-top: 22px;
}
.hero-actions .btn-outline {
  border-color: rgba(255, 255, 255, 0.45);
  background: transparent;
  color: #fff;
}
.engine-console {
  padding: 20px;
  border-left: 5px solid #f0b946;
  background: #fff;
  color: var(--ink);
  box-shadow: var(--shadow);
}
.engine-console header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}
.engine-console h2 {
  margin: 0;
  font-size: 1.05rem;
}
.engine-pulse {
  display: flex;
  align-items: center;
  gap: 5px;
  color: var(--green);
  font-size: 0.65rem;
  font-weight: 800;
}
.engine-pulse i {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--green);
  animation: pulse 1.2s ease-in-out infinite alternate;
}
.engine-word {
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
}
.engine-word strong {
  font-family: Georgia, serif;
  font-size: 2rem;
}
.engine-word span {
  display: block;
  margin-top: 5px;
  color: var(--muted);
  font-size: 0.74rem;
}
.engine-reasons {
  display: grid;
  gap: 8px;
  padding-top: 14px;
}
.engine-reasons div {
  display: grid;
  grid-template-columns: 30px 1fr auto;
  gap: 9px;
  align-items: center;
  font-size: 0.7rem;
}
.engine-reasons i {
  display: grid;
  place-items: center;
  width: 28px;
  height: 28px;
  background: var(--mint);
  color: var(--green);
}
.engine-reasons b {
  font-size: 0.72rem;
}
.engine-reasons small {
  color: var(--muted);
}
.engine-reasons em {
  font-style: normal;
  font-weight: 800;
}
.dashboard-band {
  padding: 30px 0;
}
.today-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(300px, 0.6fr);
  gap: 18px;
}
.task-lane {
  padding: 18px;
}
.task-list {
  display: grid;
  gap: 8px;
}
.task-item {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr) auto;
  gap: 12px;
  align-items: center;
  padding: 11px;
  border: 1px solid var(--line);
  background: #fff;
}
.task-icon {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  background: var(--mint);
  color: var(--green);
}
.task-item:nth-child(2) .task-icon {
  background: var(--blue-soft);
  color: var(--blue);
}
.task-item:nth-child(3) .task-icon {
  background: var(--gold-soft);
  color: var(--gold);
}
.task-item b,
.task-item span {
  display: block;
}
.task-item b {
  font-size: 0.8rem;
}
.task-item span {
  margin-top: 3px;
  color: var(--muted);
  font-size: 0.67rem;
}
.progress-ring {
  --progress: 0;
  display: grid;
  place-items: center;
  width: 48px;
  height: 48px;
  border: 6px solid #dce6e1;
  border-top-color: var(--green);
  border-right-color: var(--green);
  border-radius: 50%;
  background: #fff;
  position: relative;
}
.progress-ring::after {
  content: "";
  position: absolute;
  inset: 3px;
  border: 1px solid #edf2f0;
  border-radius: 50%;
}
.progress-ring b {
  position: relative;
  z-index: 1;
  font-size: 0.62rem;
}
.streak-panel {
  display: grid;
  align-content: start;
  gap: 12px;
  padding: 18px;
  background: #fff;
}
.streak-days {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 5px;
}
.streak-days span {
  display: grid;
  place-items: center;
  aspect-ratio: 1;
  border: 1px solid var(--line);
  font-size: 0.62rem;
}
.streak-days span.done {
  background: var(--green);
  color: #fff;
  border-color: var(--green);
}
.encouragement {
  margin: 0;
  padding: 11px;
  border-left: 3px solid var(--coral);
  background: var(--coral-soft);
  font-size: 0.75rem;
  line-height: 1.6;
}
.mode-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 8px;
}
.mode-tile {
  display: grid;
  gap: 9px;
  min-height: 150px;
  padding: 15px;
  border: 1px solid var(--line);
  border-top: 4px solid var(--green);
  background: #fff;
}
.mode-tile:nth-child(2) {
  border-color: var(--line);
  border-top-color: var(--blue);
}
.mode-tile:nth-child(3) {
  border-top-color: var(--coral);
}
.mode-tile:nth-child(4) {
  border-top-color: var(--gold);
}
.mode-tile:nth-child(5) {
  border-top-color: var(--purple);
}
.mode-tile > i {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  background: #edf5f2;
}
.mode-tile h3 {
  margin: 0;
  font-size: 0.82rem;
}
.mode-tile p {
  margin: 0;
  color: var(--muted);
  font-size: 0.67rem;
  line-height: 1.55;
}
.mode-tile span {
  margin-top: auto;
  font-size: 0.64rem;
  font-weight: 800;
  color: var(--green);
}
.library-toolbar {
  display: grid;
  grid-template-columns: minmax(220px, 1fr) repeat(2, minmax(150px, 0.3fr)) auto;
  gap: 8px;
  margin-bottom: 14px;
  padding: 11px;
  border: 1px solid var(--line);
  background: #fff;
}
.form-input,
.form-select,
.form-textarea {
  width: 100%;
  min-height: 42px;
  padding: 9px 11px;
  border: 1px solid #afbeb9;
  border-radius: 4px;
  background: #fff;
  color: var(--ink);
}
.form-textarea {
  min-height: 120px;
  resize: vertical;
}
.alphabet-bar {
  display: flex;
  gap: 4px;
  overflow-x: auto;
  padding: 7px 0 12px;
}
.alphabet-bar a {
  display: grid;
  place-items: center;
  flex: 0 0 auto;
  width: 31px;
  height: 31px;
  border: 1px solid var(--line);
  background: #fff;
  font-size: 0.67rem;
  font-weight: 800;
}
.alphabet-bar a.active,
.alphabet-bar a:hover {
  background: var(--ink);
  color: #fff;
}
.book-strip {
  display: flex;
  gap: 7px;
  overflow-x: auto;
  margin-bottom: 16px;
  padding-bottom: 6px;
}
.book-chip {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 8px 10px;
  border: 1px solid var(--line);
  background: #fff;
  font-size: 0.7rem;
  font-weight: 800;
}
.book-chip.active {
  border-color: var(--green);
  background: var(--mint);
  color: var(--green-dark);
}
.word-list {
  display: grid;
  gap: 7px;
}
.word-row {
  display: grid;
  grid-template-columns: minmax(190px, 0.42fr) minmax(260px, 0.7fr) minmax(
      220px,
      0.55fr
    ) auto;
  gap: 14px;
  align-items: center;
  padding: 13px 15px;
  border: 1px solid var(--line);
  border-left: 4px solid var(--green);
  background: #fff;
}
.word-row h2 {
  margin: 0;
  font-family: Georgia, serif;
  font-size: 1.12rem;
}
.word-row h2 a:hover {
  color: var(--green);
}
.word-row small {
  color: var(--muted);
}
.word-meaning {
  font-size: 0.77rem;
  line-height: 1.55;
}
.morph-mini {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}
.morph-mini span {
  padding: 3px 6px;
  font-size: 0.6rem;
  font-weight: 800;
}
.morph-mini span:nth-child(1) {
  background: var(--blue-soft);
  color: var(--blue);
}
.morph-mini span:nth-child(2) {
  background: var(--mint);
  color: var(--green);
}
.morph-mini span:nth-child(3) {
  background: var(--gold-soft);
  color: #855e0a;
}
.word-actions {
  display: flex;
  gap: 5px;
}
.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin-top: 18px;
}
.hologram {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(300px, 0.85fr);
  gap: 20px;
}
.word-stage {
  padding: 24px;
}
.word-stage header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 15px;
}
.word-term h1 {
  margin: 4px 0;
  font:
    700 clamp(2.7rem, 7vw, 5.5rem) / 1 Georgia,
    serif;
}
.phonetics {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin-top: 10px;
}
.phonetics button {
  display: flex;
  align-items: center;
  gap: 5px;
  border: 1px solid var(--line);
  background: #fff;
  padding: 7px 9px;
  cursor: pointer;
}
.phonetics b {
  color: var(--blue);
  font-size: 0.65rem;
}
.core-meaning {
  margin: 23px 0;
  padding: 15px;
  border-left: 4px solid var(--green);
  background: var(--mint);
  font-size: 1rem;
  line-height: 1.7;
}
.morphology-bar {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}
.morphology-bar div {
  padding: 12px;
  background: #fff;
}
.morphology-bar b,
.morphology-bar span {
  display: block;
}
.morphology-bar b {
  font-size: 0.65rem;
}
.morphology-bar span {
  margin-top: 4px;
  font:
    700 1rem Georgia,
    serif;
}
.morphology-bar div:nth-child(1) b {
  color: var(--blue);
}
.morphology-bar div:nth-child(2) b {
  color: var(--green);
}
.morphology-bar div:nth-child(3) b {
  color: var(--gold);
}
.depth-meter {
  display: grid;
  gap: 9px;
  margin-top: 18px;
}
.meter-row {
  display: grid;
  grid-template-columns: 70px 1fr 38px;
  gap: 8px;
  align-items: center;
  font-size: 0.68rem;
}
.meter {
  height: 7px;
  background: #e2e9e6;
  overflow: hidden;
}
.meter i {
  display: block;
  height: 100%;
  background: var(--green);
}
.analysis-rail {
  display: grid;
  align-content: start;
  gap: 10px;
}
.analysis-card {
  padding: 15px;
}
.analysis-card h2 {
  margin: 0 0 10px;
  font-size: 0.9rem;
}
.analysis-card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.73rem;
  line-height: 1.65;
}
.sense-list,
.phrase-list,
.relation-list {
  display: grid;
  gap: 8px;
}
.sense {
  padding: 13px;
  border-bottom: 1px solid var(--line);
}
.sense h3 {
  margin: 0;
  font-size: 0.8rem;
}
.sense p {
  margin: 6px 0;
  font-size: 0.75rem;
  line-height: 1.65;
}
.example {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 8px;
  padding: 10px;
  background: #f8faf9;
  font-family: Georgia, serif;
  font-size: 0.78rem;
  line-height: 1.6;
}
.phrase {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 8px;
  padding: 9px;
  border: 1px solid var(--line);
}
.phrase b,
.phrase span {
  display: block;
}
.phrase b {
  font-size: 0.74rem;
}
.phrase span {
  margin-top: 3px;
  color: var(--muted);
  font-size: 0.65rem;
}
.relation-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.relation-cloud a {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 6px 8px;
  border: 1px solid #aacbe9;
  background: var(--blue-soft);
  color: #215b91;
  font-size: 0.67rem;
  font-weight: 800;
}
.relation-cloud a.antonym {
  border-color: #efbaaf;
  background: var(--coral-soft);
  color: #963d2c;
}
.learning-canvas {
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr) 250px;
  gap: 14px;
}
.lesson-rail,
.lesson-feedback {
  padding: 14px;
}
.lesson-rail h2,
.lesson-feedback h2 {
  margin: 0 0 12px;
  font-size: 0.86rem;
}
.lesson-steps {
  display: grid;
  gap: 5px;
}
.lesson-step {
  display: grid;
  grid-template-columns: 26px 1fr;
  gap: 8px;
  align-items: center;
  padding: 8px;
  border: 1px solid var(--line);
  font-size: 0.68rem;
}
.lesson-step.active {
  background: var(--mint);
  border-color: var(--green);
}
.lesson-step i {
  display: grid;
  place-items: center;
  width: 24px;
  height: 24px;
  background: #edf2f0;
  font-style: normal;
}
.practice-card {
  min-height: 480px;
  display: grid;
  place-items: center;
  padding: 24px;
  background: #fff;
  border: 1px solid var(--line);
}
.flip-card {
  width: min(540px, 100%);
  min-height: 310px;
  perspective: 1000px;
}
.flip-inner {
  position: relative;
  display: grid;
  min-height: 310px;
  transition: transform 0.55s;
  transform-style: preserve-3d;
}
.flip-card.is-flipped .flip-inner {
  transform: rotateY(180deg);
}
.flip-face {
  position: absolute;
  inset: 0;
  display: grid;
  align-content: center;
  justify-items: center;
  padding: 28px;
  border: 1px solid var(--line);
  background: #fff;
  backface-visibility: hidden;
  text-align: center;
}
.flip-face.back {
  transform: rotateY(180deg);
  background: var(--mint);
}
.flip-face h2 {
  margin: 0;
  font:
    700 3.2rem Georgia,
    serif;
}
.flip-face p {
  max-width: 420px;
  line-height: 1.7;
}
.lesson-feedback ul {
  display: grid;
  gap: 8px;
  padding: 0;
  list-style: none;
}
.lesson-feedback li {
  padding: 9px;
  border-left: 3px solid var(--green);
  background: var(--mint);
  font-size: 0.68rem;
  line-height: 1.5;
}
.option-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  width: min(600px, 100%);
  margin-top: 18px;
}
.option-btn {
  min-height: 52px;
  padding: 10px;
  border: 1px solid var(--line);
  background: #fff;
  text-align: left;
  cursor: pointer;
}
.option-btn:hover {
  border-color: var(--green);
  background: var(--mint);
}
.spelling-practice {
  width: min(610px, 100%);
  min-height: 430px;
}
.spelling-practice .flip-inner { min-height: 430px; }
.spelling-practice .flip-face {
  align-content: start;
  gap: 18px;
  padding: 30px clamp(18px, 5vw, 44px);
  border-top: 5px solid var(--green);
  background: linear-gradient(180deg, #f2fbf7 0, #fff 115px);
}
.spelling-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  width: 100%;
}
.spelling-heading small { color: var(--muted); font-size: 0.72rem; }
.spelling-pattern {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: clamp(5px, 1.4vw, 10px);
  width: 100%;
  min-height: 58px;
  padding: 8px 0;
}
.spelling-pattern > * {
  flex: 0 0 clamp(25px, 5vw, 36px);
  width: clamp(25px, 5vw, 36px);
  height: 44px;
  font: 700 clamp(1.15rem, 4vw, 1.65rem)/44px Georgia, serif;
  font-style: normal;
  text-align: center;
}
.spelling-given {
  color: var(--green);
  background: var(--mint);
  border-bottom: 3px solid var(--green);
}
.spelling-blank {
  border-bottom: 3px solid #31536b;
  background: repeating-linear-gradient(-45deg, #f2f6f7 0, #f2f6f7 5px, #fff 5px, #fff 10px);
}
.spelling-audio-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  width: 100%;
}
.spelling-phonetic {
  min-width: 0;
  color: #395469;
  font-size: 0.86rem;
  overflow-wrap: anywhere;
}
.spelling-speak-btn {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  min-height: 38px;
  padding: 7px 12px;
  border: 1px solid #b7d4c9;
  background: #fff;
  color: var(--green);
  cursor: pointer;
}
.spelling-speak-btn svg, .spelling-note svg, .spelling-submit svg { width: 17px; height: 17px; }
.spelling-speak-btn.is-loading { opacity: 0.6; pointer-events: none; }
.spelling-meaning {
  display: grid;
  gap: 5px;
  width: 100%;
  padding: 14px 16px;
  border-left: 4px solid var(--blue);
  background: #eef7fb;
  text-align: left;
}
.spelling-meaning span, .spelling-answer > span { color: var(--muted); font-size: 0.68rem; }
.spelling-meaning strong { color: #183747; font-size: 0.98rem; line-height: 1.55; }
.spelling-answer { display: grid; gap: 7px; width: 100%; text-align: left; }
.spelling-answer .form-input { min-height: 50px; border: 2px solid #9dbab0; font-size: 1rem; }
.spelling-answer .form-input:focus { border-color: var(--green); outline: 3px solid #dcefe8; }
.spelling-submit { width: 100%; min-height: 48px; }
.spelling-note {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  margin: -4px 0 0;
  color: var(--muted);
  font-size: 0.66rem;
}
.spelling-feedback {
  margin-bottom: 14px;
  padding: 14px 18px;
  border-left: 5px solid currentColor;
  line-height: 1.65;
}
.spelling-feedback a { font-weight: 700; text-decoration: underline; }
.castle-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}
.castle {
  position: relative;
  overflow: hidden;
  min-height: 220px;
  padding: 18px;
  border: 1px solid var(--line);
  background: #fff;
}
.castle:nth-child(2) {
  border-top: 5px solid var(--blue);
}
.castle:nth-child(3) {
  border-top: 5px solid var(--coral);
}
.castle:first-child {
  border-top: 5px solid var(--green);
}
.castle h2 {
  margin: 40px 0 8px;
}
.castle p {
  color: var(--muted);
  font-size: 0.72rem;
  line-height: 1.6;
}
.castle-number {
  position: absolute;
  right: 13px;
  top: 8px;
  color: #dfe8e4;
  font:
    900 4.5rem/1 Georgia,
    serif;
}
.level-map {
  display: flex;
  align-items: center;
  gap: 7px;
  margin-top: 16px;
}
.level-node {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border: 2px solid var(--line);
  background: #fff;
  border-radius: 50%;
  font-size: 0.66rem;
  font-weight: 900;
}
.level-node.open {
  border-color: var(--green);
  background: var(--mint);
}
.level-node.locked {
  color: #9aa7a3;
}
.chart-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}
.chart-panel {
  min-height: 260px;
  padding: 17px;
}
.bar-chart {
  display: flex;
  align-items: end;
  gap: 8px;
  height: 160px;
  padding-top: 18px;
}
.bar-chart div {
  display: grid;
  align-content: end;
  flex: 1;
  height: 100%;
  gap: 5px;
}
.bar-chart i {
  display: block;
  min-height: 4px;
  background: var(--green);
}
.bar-chart span {
  text-align: center;
  color: var(--muted);
  font-size: 0.6rem;
}
.radar-placeholder {
  display: grid;
  place-items: center;
  height: 180px;
}
.radar-shape {
  position: relative;
  width: 150px;
  height: 150px;
  border: 1px solid #aebdb8;
  clip-path: polygon(50% 0, 95% 25%, 95% 75%, 50% 100%, 5% 75%, 5% 25%);
  background: rgba(53, 120, 183, 0.16);
}
.radar-shape::after {
  content: "";
  position: absolute;
  inset: 25px;
  clip-path: inherit;
  background: rgba(35, 134, 111, 0.42);
}
.data-table {
  width: 100%;
  border-collapse: collapse;
  background: #fff;
  font-size: 0.72rem;
}
.data-table th,
.data-table td {
  padding: 9px 10px;
  border-bottom: 1px solid var(--line);
  text-align: left;
}
.data-table th {
  background: #edf3f0;
  color: #52635f;
  font-size: 0.64rem;
}
.admin-layout {
  display: grid;
  grid-template-columns: 210px minmax(0, 1fr);
  min-height: calc(100vh - var(--header));
}
.admin-sidebar {
  padding: 16px;
  background: #1b3833;
  color: #fff;
}
.admin-sidebar h2 {
  margin: 0 0 12px;
  font-size: 0.9rem;
}
.admin-sidebar nav {
  display: grid;
  gap: 4px;
}
.admin-sidebar a {
  display: flex;
  gap: 7px;
  padding: 9px;
  color: rgba(255, 255, 255, 0.72);
  font-size: 0.7rem;
}
.admin-sidebar a.active,
.admin-sidebar a:hover {
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
}
.admin-content {
  min-width: 0;
  padding: 24px;
}
.admin-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
}
.admin-stat {
  padding: 14px;
  border-top: 4px solid var(--green);
  background: #fff;
}
.admin-stat:nth-child(2) {
  border-color: var(--blue);
}
.admin-stat:nth-child(3) {
  border-color: var(--coral);
}
.admin-stat:nth-child(4) {
  border-color: var(--gold);
}
.admin-stat b,
.admin-stat span {
  display: block;
}
.admin-stat b {
  font-size: 1.4rem;
}
.admin-stat span {
  color: var(--muted);
  font-size: 0.66rem;
}
.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}
.form-field {
  display: grid;
  gap: 5px;
}
.form-field span {
  font-size: 0.68rem;
  font-weight: 800;
  color: var(--muted);
}
.form-field.full {
  grid-column: 1/-1;
}
.empty-state {
  display: grid;
  justify-items: center;
  gap: 8px;
  padding: 36px 18px;
  border: 1px dashed #aab9b4;
  background: #fff;
  text-align: center;
}
.empty-state h2,
.empty-state p {
  margin: 0;
}
.empty-state p {
  color: var(--muted);
  font-size: 0.74rem;
}
.mobile-dock {
  display: none;
}
.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 24px max(20px, calc((100% - 1200px) / 2));
  background: #15332e;
  color: #fff;
}
.site-footer b,
.site-footer span {
  display: block;
}
.site-footer span,
.site-footer p {
  color: rgba(255, 255, 255, 0.65);
  font-size: 0.66rem;
}
.site-footer p {
  margin: 0;
}
.auth-body {
  min-height: 100vh;
  background: #102f2a;
  color: #fff;
}
.auth-stage {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(380px, 0.92fr);
  min-height: 100vh;
}
.auth-brief {
  position: relative;
  overflow: hidden;
  display: grid;
  align-content: center;
  padding: clamp(36px, 8vw, 110px);
  border-right: 1px solid rgba(255, 255, 255, 0.18);
}
.auth-brief::after {
  content: "prefix  +  root  +  suffix";
  position: absolute;
  right: -30px;
  bottom: 35px;
  color: rgba(255, 255, 255, 0.08);
  font: 800 clamp(2rem, 5vw, 5rem) Georgia, serif;
  white-space: nowrap;
  animation: wordDrift 9s ease-in-out infinite alternate;
}
.brand-kicker {
  color: #f1bc45;
  font-size: 0.68rem;
  font-weight: 900;
  letter-spacing: 0.12em;
}
.auth-brief h1 {
  max-width: 760px;
  margin: 13px 0 18px;
  font-size: clamp(2.5rem, 6vw, 5.8rem);
  line-height: 0.98;
}
.auth-brief p {
  max-width: 640px;
  color: rgba(255, 255, 255, 0.7);
  line-height: 1.8;
}
.auth-word-line {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin-top: 28px;
}
.auth-word-line span {
  padding: 7px 9px;
  border: 1px solid rgba(255, 255, 255, 0.24);
  color: rgba(255, 255, 255, 0.82);
  font: 700 0.72rem Georgia, serif;
}
.auth-word-line span:nth-child(2n) {
  color: #95ddc9;
  transform: translateY(8px);
}
.auth-panel {
  display: grid;
  align-content: center;
  padding: clamp(24px, 6vw, 80px);
  background: #f4f8f5;
  color: var(--ink);
}
.auth-panel > * {
  width: min(470px, 100%);
  margin-left: auto;
  margin-right: auto;
}
.auth-panel h2 {
  margin: 0 0 8px;
  font-size: 1.65rem;
}
.auth-panel > p {
  margin: 0 0 22px;
  color: var(--muted);
  line-height: 1.65;
}
.stack-form {
  display: grid;
  gap: 14px;
}
.stack-form label {
  display: grid;
  gap: 6px;
  color: #40534f;
  font-size: 0.72rem;
  font-weight: 800;
}
.input-with-action {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 7px;
}
.auth-switch {
  margin-top: 18px;
  color: var(--muted);
  font-size: 0.72rem;
}
.auth-switch a {
  color: var(--green-dark);
  font-weight: 900;
}
.notice-box {
  padding: 12px;
  border-left: 4px solid var(--blue);
  background: var(--blue-soft);
  color: #315b80;
  font-size: 0.71rem;
  line-height: 1.65;
}
.section-band {
  padding: 28px 0;
}
.book-grid,
.workbook-grid,
.social-grid,
.achievement-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}
.book-card,
.workbook-card,
.social-card,
.achievement-card {
  display: grid;
  align-content: start;
  gap: 10px;
  min-height: 180px;
  padding: 17px;
  border: 1px solid var(--line);
  border-top: 5px solid var(--book-color, var(--green));
  background: #fff;
}
.book-card h2,
.workbook-card h2,
.social-card h2,
.achievement-card h2 {
  margin: 0;
  font-size: 0.95rem;
}
.book-card p,
.workbook-card p,
.social-card p,
.achievement-card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.7rem;
  line-height: 1.65;
}
.book-card .card-foot,
.workbook-card .card-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-top: auto;
}
.detail-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(280px, 0.7fr);
  gap: 14px;
}
.panel-pad {
  padding: 17px;
}
.inline-form {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: end;
}
.inline-form label {
  display: grid;
  gap: 5px;
  min-width: 160px;
  flex: 1;
  color: var(--muted);
  font-size: 0.66rem;
  font-weight: 800;
}
.feedback-correct,
.feedback-wrong {
  padding: 14px;
  border-left: 4px solid var(--green);
  background: var(--mint);
  line-height: 1.65;
}
.feedback-wrong {
  border-color: var(--coral);
  background: var(--coral-soft);
}
.stat-link {
  display: block;
}
.stat-link:hover {
  background: #f4f8f6;
}
.status-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  margin-right: 5px;
  border-radius: 50%;
  background: var(--green);
}
.status-dot.warn {
  background: var(--gold);
}
.status-dot.danger {
  background: var(--coral);
}
.admin-nav-mobile {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 16px;
}
.word-card-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(360px, 0.95fr);
  gap: 0;
  overflow: hidden;
  border-top: 6px solid var(--green);
}
.word-card-identity {
  display: grid;
  align-content: center;
  min-width: 0;
  padding: clamp(24px, 5vw, 58px);
}
.word-card-identity h1 {
  overflow-wrap: anywhere;
  margin: 10px 0 5px;
  font: 700 clamp(3rem, 7vw, 6.2rem)/0.96 Georgia, serif;
}
.syllable-line {
  margin: 8px 0 15px;
  color: var(--muted);
  font: 700 0.9rem Georgia, serif;
  letter-spacing: 0.08em;
}
.syllable-line b {
  margin-right: 8px;
  color: var(--blue);
  font: 800 0.62rem var(--font);
  letter-spacing: 0;
}
.phonetic-switcher {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
}
.phonetic-tab {
  min-height: 34px;
  padding: 0 10px;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--muted);
  cursor: pointer;
  font-size: 0.68rem;
  font-weight: 800;
}
.phonetic-tab.active {
  border-color: var(--blue);
  background: var(--blue-soft);
  color: #255c8e;
}
.phonetic-switcher > span {
  min-width: 125px;
  padding: 0 8px;
  font: 700 0.9rem Georgia, serif;
}
.core-meaning small {
  display: block;
  margin-top: 8px;
  color: #526761;
  font-size: 0.72rem;
}
.word-illustration {
  display: grid;
  align-content: center;
  margin: 0;
  padding: 18px;
  background: #173d36;
}
.word-illustration img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid rgba(255, 255, 255, 0.2);
}
.word-illustration figcaption {
  margin-top: 7px;
  color: rgba(255, 255, 255, 0.68);
  font-size: 0.64rem;
  line-height: 1.5;
}
.word-learning-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(290px, 0.65fr);
  gap: 14px;
  margin-top: 14px;
}
.mastery-panel {
  border-top: 5px solid var(--gold);
}
.mastery-stars {
  display: flex;
  gap: 5px;
  margin: 12px 0;
  color: #c9d1ce;
}
.mastery-stars svg.filled {
  fill: #e4aa2c;
  color: #b97f08;
}
.mastery-buttons {
  display: grid;
  gap: 7px;
}
.mastery-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  min-height: 42px;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink);
  cursor: pointer;
  font-size: 0.72rem;
  font-weight: 800;
}
.mastery-btn.mastered.active,
.mastery-btn.mastered:hover {
  border-color: var(--green);
  background: var(--mint);
  color: var(--green-dark);
}
.mastery-btn.strengthen.active,
.mastery-btn.strengthen:hover {
  border-color: var(--gold);
  background: var(--gold-soft);
  color: #805a0c;
}
.mastery-btn.unmastered.active,
.mastery-btn.unmastered:hover {
  border-color: var(--coral);
  background: var(--coral-soft);
  color: #923d2d;
}
.relation-workbench {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  padding: 1px;
  background: var(--line);
}
.relation-workbench > div {
  min-width: 0;
  padding: 15px;
  background: #fff;
}
.relation-workbench h3 {
  margin: 0 0 10px;
  font-size: 0.82rem;
}
.derivative-cloud a {
  border-color: #a9d8c8;
  background: var(--mint);
  color: var(--green-dark);
}
.scene-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(330px, 0.85fr);
  gap: 12px;
}
.scene-player,
.subtitle-lab {
  padding: 14px;
}
.scene-frame {
  overflow: hidden;
  aspect-ratio: 16/9;
  border: 1px solid var(--line);
  background: #102f2a;
}
.scene-frame iframe {
  width: 100%;
  height: 100%;
  border: 0;
}
.scene-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin-top: 10px;
}
.scene-player > small,
.subtitle-lab > small {
  display: block;
  margin-top: 8px;
  color: var(--muted);
  font-size: 0.62rem;
  line-height: 1.5;
}
.subtitle-screen {
  display: grid;
  align-content: end;
  min-height: 230px;
  padding: 18px;
  background: #102f2a;
  color: #fff;
}
.subtitle-screen p {
  margin: 16px 0 6px;
  padding: 10px;
  border-left: 4px solid #f1bc45;
  background: rgba(255, 255, 255, 0.1);
  font: 700 1rem/1.65 Georgia, serif;
}
.subtitle-screen small {
  color: rgba(255, 255, 255, 0.66);
}
.subtitle-lab label {
  display: grid;
  gap: 5px;
  margin-top: 12px;
  color: var(--muted);
  font-size: 0.66rem;
  font-weight: 800;
}
.output-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}
.output-practice {
  padding: 18px;
  border-top: 5px solid var(--blue);
}
.output-practice:nth-child(2) {
  border-top-color: var(--coral);
}
.output-practice h2 {
  margin: 11px 0 5px;
}
.output-practice > p {
  color: var(--muted);
  font-size: 0.72rem;
  line-height: 1.65;
}
.focus-console {
  display: grid;
  justify-items: center;
  gap: 16px;
  padding: 32px;
  text-align: center;
  border-top: 6px solid var(--coral);
}
.focus-console > strong {
  font: 800 clamp(4rem, 12vw, 8rem)/1 Georgia, serif;
  color: var(--green-dark);
}
.focus-console label {
  display: grid;
  gap: 5px;
  color: var(--muted);
  font-size: 0.68rem;
  font-weight: 800;
}
.focus-console label input {
  width: 120px;
}
.stage-foundation .word-card-hero {
  border-top-color: var(--blue);
}
.stage-foundation .word-illustration {
  order: -1;
  background: #eaf3fc;
}
.stage-foundation .word-illustration figcaption {
  color: #315b80;
}
.stage-exam .word-card-hero {
  border-top-color: var(--coral);
}
.stage-exam .word-card-identity {
  background: #fffdf9;
}
.stage-academic .word-card-identity {
  background: #173d36;
  color: #fff;
}
.stage-academic .word-card-identity .syllable-line,
.stage-academic .word-card-identity .core-meaning small {
  color: rgba(255, 255, 255, 0.7);
}
.stage-academic .word-card-identity .core-meaning {
  color: var(--ink);
}
@keyframes wordDrift {
  to {
    transform: translateX(-55px);
  }
}
@keyframes pulse {
  to {
    opacity: 0.35;
    transform: scale(0.75);
  }
}
@media (prefers-reduced-motion: reduce) {
  * {
    scroll-behavior: auto !important;
    animation: none !important;
    transition: none !important;
  }
  .flip-inner {
    transition: none;
  }
}
@media (max-width: 1100px) {
  .primary-nav {
    position: fixed;
    top: var(--header);
    left: 0;
    right: 0;
    display: none;
    grid-template-columns: repeat(4, 1fr);
    padding: 9px;
    background: #173d36;
    border-bottom: 1px solid rgba(255, 255, 255, 0.18);
  }
  .primary-nav.open {
    display: grid;
  }
  .nav-toggle {
    display: grid;
  }
  .hero-workspace-inner {
    grid-template-columns: 1fr 380px;
  }
  .mode-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .learning-canvas {
    grid-template-columns: 180px minmax(0, 1fr);
  }
  .lesson-feedback {
    grid-column: 1/-1;
  }
  .word-row {
    grid-template-columns: minmax(170px, 0.4fr) minmax(240px, 0.7fr) auto;
  }
  .word-row .morph-mini {
    display: none;
  }
}
@media (max-width: 760px) {
  :root {
    --header: 59px;
  }
  body {
    padding-bottom: 64px;
  }
  .nav-shell {
    padding: 0 9px;
    gap: 7px;
  }
  .brand small,
  .brand > span:last-child,
  .level-chip,
  .header-user > .icon-btn {
    display: none;
  }
  .brand-symbol {
    width: 38px;
    height: 38px;
  }
  .primary-nav {
    grid-template-columns: 1fr 1fr;
    max-height: calc(100vh - var(--header));
    overflow: auto;
  }
  .primary-nav a {
    height: 42px;
  }
  .page-shell {
    padding: 22px 13px 38px;
  }
  .page-heading {
    display: grid;
    align-items: start;
  }
  .page-heading h1 {
    font-size: 1.7rem;
  }
  .page-actions {
    display: grid;
    grid-template-columns: 1fr 1fr;
  }
  .hero-workspace,
  .hero-workspace-inner {
    min-height: 0;
  }
  .hero-workspace-inner {
    grid-template-columns: 1fr;
    padding: 34px 14px;
  }
  .hero-copy h1 {
    font-size: 2.55rem;
  }
  .engine-console {
    padding: 15px;
  }
  .today-layout,
  .hologram,
  .chart-grid {
    grid-template-columns: 1fr;
  }
  .metric-strip {
    grid-template-columns: 1fr 1fr;
  }
  .mode-grid {
    grid-template-columns: 1fr 1fr;
  }
  .mode-tile {
    min-height: 135px;
  }
  .library-toolbar {
    grid-template-columns: 1fr 1fr;
  }
  .library-toolbar .form-input {
    grid-column: 1/-1;
  }
  .word-row {
    grid-template-columns: minmax(0, 1fr) auto;
    padding: 12px;
  }
  .word-row .word-meaning {
    grid-column: 1/-1;
  }
  .word-actions {
    grid-column: 2;
    grid-row: 1;
  }
  .morphology-bar {
    grid-template-columns: 1fr;
  }
  .learning-canvas {
    grid-template-columns: 1fr;
  }
  .lesson-rail {
    overflow-x: auto;
  }
  .lesson-steps {
    display: flex;
  }
  .lesson-step {
    flex: 0 0 auto;
  }
  .practice-card {
    min-height: 400px;
    padding: 14px;
  }
  .spelling-practice,
  .spelling-practice .flip-inner { min-height: 460px; }
  .spelling-practice .flip-face {
    position: relative;
    min-height: 460px;
    padding: 22px 16px;
  }
  .spelling-heading,
  .spelling-audio-row { align-items: flex-start; }
  .spelling-heading { flex-direction: column; gap: 6px; }
  .spelling-audio-row { flex-direction: column; width: 100%; }
  .spelling-speak-btn { width: 100%; justify-content: center; }
  .spelling-note { align-items: flex-start; text-align: left; }
  .option-grid {
    grid-template-columns: 1fr;
  }
  .castle-grid {
    grid-template-columns: 1fr;
  }
  .admin-layout {
    grid-template-columns: 1fr;
  }
  .admin-sidebar {
    overflow-x: auto;
  }
  .admin-sidebar nav {
    display: flex;
  }
  .admin-sidebar a {
    flex: 0 0 auto;
  }
  .admin-content {
    padding: 17px 12px;
  }
  .admin-stats {
    grid-template-columns: 1fr 1fr;
  }
  .data-table-wrap {
    overflow-x: auto;
  }
  .data-table {
    min-width: 680px;
  }
  .form-grid {
    grid-template-columns: 1fr;
  }
  .form-field.full {
    grid-column: auto;
  }
  .site-footer {
    align-items: flex-start;
    flex-direction: column;
    padding: 22px 14px;
  }
  .auth-stage {
    grid-template-columns: 1fr;
  }
  .auth-brief {
    min-height: 280px;
    padding: 34px 18px;
    border-right: 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.18);
  }
  .auth-brief h1 {
    font-size: 2.65rem;
  }
  .auth-panel {
    padding: 30px 15px 44px;
  }
  .book-grid,
  .workbook-grid,
  .social-grid,
  .achievement-grid,
  .detail-grid {
    grid-template-columns: minmax(0, 1fr);
  }
  .hologram {
    grid-template-columns: minmax(0, 1fr);
  }
  .word-stage,
  .analysis-rail,
  .analysis-card,
  .word-term {
    min-width: 0;
  }
  .word-term h1 {
    overflow-wrap: anywhere;
  }
  .word-card-hero,
  .word-learning-grid,
  .scene-grid,
  .output-grid,
  .relation-workbench {
    grid-template-columns: minmax(0, 1fr);
  }
  .word-card-identity {
    padding: 27px 17px;
  }
  .word-card-identity h1 {
    font-size: clamp(2.8rem, 15vw, 4.7rem);
  }
  .word-illustration {
    order: 0;
  }
  .stage-foundation .word-illustration {
    order: -1;
  }
  .mobile-dock {
    position: fixed;
    z-index: 90;
    left: 0;
    right: 0;
    bottom: 0;
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    height: 64px;
    padding-bottom: env(safe-area-inset-bottom);
    background: #fff;
    border-top: 1px solid var(--line);
    box-shadow: 0 -6px 18px rgba(24, 51, 47, 0.08);
  }
  .mobile-dock a {
    display: grid;
    place-items: center;
    align-content: center;
    gap: 2px;
    color: var(--muted);
    font-size: 0.57rem;
  }
  .mobile-dock svg {
    width: 18px;
  }
  .mobile-dock .dock-main {
    position: relative;
    color: #fff;
  }
  .mobile-dock .dock-main::before {
    content: "";
    position: absolute;
    width: 48px;
    height: 48px;
    background: var(--green);
    border-radius: 50%;
    z-index: -1;
  }
  .mobile-dock .dock-main span {
    color: var(--ink);
    transform: translateY(15px);
  }
}
@media (max-width: 430px) {
  .metric-strip,
  .mode-grid,
  .admin-stats {
    grid-template-columns: 1fr 1fr;
  }
  .task-item {
    grid-template-columns: 40px minmax(0, 1fr);
  }
  .task-item .btn {
    grid-column: 2;
    justify-self: start;
  }
  .streak-days {
    gap: 3px;
  }
  .page-actions {
    grid-template-columns: 1fr;
  }
  .library-toolbar {
    grid-template-columns: 1fr;
  }
  .library-toolbar .form-input {
    grid-column: auto;
  }
  .word-term h1 {
    font-size: 2.9rem;
  }
}

/* Local scene studio and explainable word-relation network */
.context-return,
.relation-source,
.local-resource-badge {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  color: var(--green-dark);
  font-weight: 800;
}
.context-return svg,
.relation-source svg,
.local-resource-badge svg {
  width: 17px;
  height: 17px;
}
.relation-source,
.local-resource-badge {
  padding: 8px 11px;
  border: 1px solid #a9d7c8;
  border-radius: var(--radius);
  background: var(--mint);
  font-size: .72rem;
}
.relation-map {
  overflow: hidden;
  padding: 18px;
  background: #f8fbf9;
}
.relation-centre {
  display: grid;
  justify-items: center;
  gap: 4px;
  width: min(360px, 100%);
  margin: 0 auto 18px;
  padding: 16px 20px;
  border: 2px solid var(--ink);
  border-radius: var(--radius);
  background: #fff;
  text-align: center;
  box-shadow: 0 8px 0 rgba(24, 51, 47, .08);
}
.relation-centre small {
  color: var(--muted);
  font-size: .64rem;
  font-weight: 800;
  text-transform: uppercase;
}
.relation-centre strong {
  font: 800 1.65rem/1.1 Georgia, serif;
}
.relation-centre span {
  color: var(--muted);
  font-size: .72rem;
}
.relation-lanes {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}
.relation-lane {
  min-width: 0;
  padding: 14px;
  border: 1px solid var(--line);
  border-top: 5px solid var(--relation-color);
  border-radius: var(--radius);
  background: #fff;
}
.relation-syn { --relation-color: var(--blue); --relation-soft: var(--blue-soft); --relation-text: #1e5f99; }
.relation-ant { --relation-color: var(--coral); --relation-soft: var(--coral-soft); --relation-text: #a93f2e; }
.relation-der { --relation-color: var(--green); --relation-soft: var(--mint); --relation-text: var(--green-dark); }
.relation-lane h3 {
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr) auto;
  align-items: center;
  gap: 8px;
  margin: 0 0 12px;
  color: var(--relation-text);
  font-size: .84rem;
}
.relation-lane h3 > svg {
  width: 28px;
  height: 28px;
  padding: 5px;
  border-radius: 50%;
  background: var(--relation-soft);
}
.relation-lane h3 span,
.relation-lane h3 small {
  display: block;
}
.relation-lane h3 small {
  margin-top: 2px;
  color: var(--muted);
  font-size: .59rem;
}
.relation-lane h3 > b {
  display: grid;
  place-items: center;
  min-width: 25px;
  height: 25px;
  border-radius: 50%;
  background: var(--relation-soft);
  font-size: .68rem;
}
.relation-nodes {
  display: grid;
  gap: 7px;
}
.relation-node {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 34px;
  align-items: center;
  gap: 5px;
  min-width: 0;
  border: 1px solid color-mix(in srgb, var(--relation-color) 45%, #fff);
  border-radius: var(--radius);
  background: var(--relation-soft);
}
.relation-node > a {
  display: grid;
  gap: 2px;
  min-width: 0;
  padding: 9px 4px 9px 11px;
  color: var(--relation-text);
}
.relation-node > a:hover b { text-decoration: underline; }
.relation-node b { font-size: .78rem; overflow-wrap: anywhere; }
.relation-node small {
  overflow: hidden;
  color: var(--muted);
  font-size: .59rem;
  line-height: 1.45;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.relation-node .speak-btn {
  width: 30px;
  height: 30px;
  color: var(--relation-text);
  background: #fff;
}
.relation-empty {
  display: flex;
  align-items: center;
  gap: 7px;
  min-height: 52px;
  padding: 10px;
  border: 1px dashed var(--line);
  color: var(--muted);
  font-size: .67rem;
  line-height: 1.5;
}
.relation-empty svg { width: 18px; flex: 0 0 auto; }
.scene-studio {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(320px, .85fr);
  overflow: hidden;
  background: #fff;
}
.local-scene {
  display: grid;
  grid-template-rows: auto minmax(260px, 1fr) auto 5px;
  min-width: 0;
  background: #153d36;
  color: #fff;
}
.scene-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 14px;
  border-bottom: 1px solid rgba(255,255,255,.18);
  font-size: .62rem;
  font-weight: 800;
}
.scene-toolbar span { display: inline-flex; align-items: center; gap: 7px; }
.scene-toolbar svg { width: 16px; }
.scene-toolbar b { color: #ffd48d; }
.scene-set {
  position: relative;
  display: grid;
  grid-template-columns: minmax(110px, .8fr) minmax(150px, 1.4fr) minmax(120px, 1fr);
  align-items: end;
  gap: 10px;
  overflow: hidden;
  padding: 28px 22px 34px;
  background: #dff0e9;
  color: var(--ink);
}
.scene-set::before {
  content: "";
  position: absolute;
  inset: auto 0 0;
  height: 30%;
  background: #b8d2c8;
  border-top: 3px solid #8eb2a5;
}
.stage-scene-exam .scene-set { background: #e8f1fa; }
.stage-scene-academic .scene-set { background: #edf0e9; }
.scene-place,
.scene-person,
.scene-path {
  position: relative;
  z-index: 1;
}
.scene-place {
  display: grid;
  place-items: center;
  gap: 7px;
  min-height: 126px;
  padding: 14px;
  border: 2px solid #88aa9d;
  border-bottom-width: 8px;
  border-radius: var(--radius);
  background: #fff;
  text-align: center;
  font-size: .68rem;
  font-weight: 800;
}
.scene-place svg { width: 42px; height: 42px; color: var(--green-dark); }
.scene-path {
  display: grid;
  align-content: center;
  justify-items: center;
  gap: 10px;
  align-self: center;
  min-height: 90px;
  border-bottom: 3px dashed #638c7e;
}
.scene-path > svg { color: #638c7e; }
.scene-word-token {
  display: inline-grid;
  place-items: center;
  max-width: 100%;
  padding: 9px 13px;
  border: 2px solid var(--coral);
  border-radius: var(--radius);
  background: #fff;
  color: #a83f2d;
  font: 800 .9rem/1.2 Georgia, serif;
  overflow-wrap: anywhere;
  box-shadow: 0 5px 0 rgba(168,63,45,.16);
}
.scene-person {
  display: grid;
  justify-items: center;
  gap: 8px;
}
.scene-person > svg { width: 62px; height: 62px; color: var(--ink); }
.scene-speech {
  display: grid;
  gap: 2px;
  width: 100%;
  padding: 9px;
  border: 1px solid #9fb9af;
  border-radius: var(--radius);
  background: #fff;
  text-align: center;
}
.scene-speech b { color: var(--green-dark); overflow-wrap: anywhere; }
.scene-speech small { color: var(--muted); font-size: .6rem; }
.scene-caption {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 12px;
  min-height: 76px;
  padding: 12px 16px;
  border-top: 1px solid rgba(255,255,255,.18);
}
.scene-caption p {
  margin: 0;
  font: 700 .88rem/1.6 Georgia, serif;
}
.scene-caption small { color: #ffd48d; font-variant-numeric: tabular-nums; }
.scene-progress { overflow: hidden; background: rgba(255,255,255,.16); }
.scene-progress i { display: block; width: 0; height: 100%; background: #ffd48d; transition: width .12s linear; }
.scene-learning-panel {
  min-width: 0;
  padding: 16px;
  border-left: 1px solid var(--line);
}
.scene-learning-panel .scene-actions { margin: 0 0 13px; }
.subtitle-track {
  display: grid;
  gap: 7px;
  max-height: 260px;
  overflow-y: auto;
}
.subtitle-track button {
  display: grid;
  grid-template-columns: 28px minmax(0, 1fr) 20px;
  align-items: start;
  gap: 8px;
  width: 100%;
  padding: 9px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  color: var(--ink);
  text-align: left;
  cursor: pointer;
}
.subtitle-track button b { color: var(--green); font-size: .64rem; }
.subtitle-track button span { font: 700 .7rem/1.55 Georgia, serif; }
.subtitle-track button svg { width: 17px; color: var(--muted); }
.subtitle-track button.active {
  border-color: var(--green);
  background: var(--mint);
  box-shadow: inset 4px 0 var(--green);
}
.scene-translation {
  display: grid;
  gap: 4px;
  margin: 13px 0 0;
  padding: 10px;
  border-left: 4px solid var(--gold);
  background: var(--gold-soft);
  font-size: .68rem;
  line-height: 1.6;
}
.scene-edit { margin-top: 12px; border-top: 1px solid var(--line); padding-top: 10px; }
.scene-edit summary { color: var(--green-dark); font-size: .7rem; font-weight: 800; cursor: pointer; }
.scene-edit label { display: grid; gap: 5px; margin-top: 10px; color: var(--muted); font-size: .65rem; font-weight: 800; }
.scene-edit > small { display: block; margin-top: 5px; color: var(--muted); font-size: .6rem; line-height: 1.5; }
.scene-studio.is-playing .scene-word-token { animation: scene-word-travel var(--scene-duration, 6s) ease-in-out both; }
.scene-studio.is-playing .scene-speech { animation: scene-speech-focus 1.2s ease-in-out infinite alternate; }
.scene-studio.is-paused .scene-word-token,
.scene-studio.is-paused .scene-speech { animation-play-state: paused; }
.scene-studio.is-finished .scene-word-token { border-color: var(--green); color: var(--green-dark); }
/* Each scene theme changes the local set, accent, and motion cue so examples do not feel cloned. */
.scene-theme-travel .scene-set { background:#e9f4ff; }
.scene-theme-travel .scene-word-token { border-radius:999px; color:#1769aa; border-color:#3d9be9; }
.scene-studio.is-playing .scene-theme-travel .scene-word-token { animation-name:scene-flight; }
.scene-theme-campus .scene-set { background:#fff5dc; }
.scene-theme-campus .scene-word-token { border-radius:6px 18px 6px 18px; color:#85511b; border-color:#d79b43; }
.scene-studio.is-playing .scene-theme-campus .scene-word-token { animation-name:scene-study; }
.scene-theme-nature .scene-set { background:#e7f6e8; }
.scene-theme-nature .scene-word-token { border-radius:50% 8px 50% 8px; color:#2c7545; border-color:#62ae72; }
.scene-studio.is-playing .scene-theme-nature .scene-word-token { animation-name:scene-breeze; }
.scene-theme-business .scene-set { background:#f1efff; }
.scene-theme-business .scene-word-token { border-radius:4px; color:#5746a0; border-color:#8876db; }
.scene-studio.is-playing .scene-theme-business .scene-word-token { animation-name:scene-handoff; }
.scene-theme-emotion .scene-set { background:#fff0f1; }
.scene-theme-emotion .scene-word-token { border-radius:50%; color:#b34558; border-color:#e58491; }
.scene-studio.is-playing .scene-theme-emotion .scene-word-token { animation-name:scene-pulse; }
.scene-theme-science .scene-set { background:#edf5f4; }
.scene-theme-science .scene-word-token { border-radius:14px 14px 4px 4px; color:#277d78; border-color:#58aaa3; }
.scene-studio.is-playing .scene-theme-science .scene-word-token { animation-name:scene-orbit; }
.scene-theme-daily .scene-set { background:#fff9e9; }
.scene-studio.is-playing .scene-theme-daily .scene-word-token { animation-name:scene-bounce; }
.scene-context-cue{position:absolute;z-index:2;left:16px;right:16px;top:15px;display:flex;align-items:center;gap:9px;pointer-events:none}.scene-context-cue span{padding:5px 9px;border-radius:999px;background:rgba(21,61,54,.9);color:#fff;font-size:.58rem;font-weight:900}.scene-context-cue b{padding:5px 9px;border-radius:8px;background:rgba(255,255,255,.88);color:#264e46;font-size:.59rem;box-shadow:0 3px 12px rgba(23,54,48,.08)}.scene-context-cue small{margin-left:auto;color:#315d54;font-size:.55rem;font-weight:900;letter-spacing:.08em}.scene-caption mark{padding:2px 5px;border-radius:5px;background:#ffd48d;color:#173f37}.scene-pos-verb .scene-person>svg{animation:scene-actor-action 1.15s ease-in-out infinite alternate}.scene-pos-adjective .scene-speech{box-shadow:0 0 0 5px rgba(255,255,255,.38)}.scene-pos-adverb .scene-word-token{border-style:dashed}.scene-pos-noun .scene-word-token{box-shadow:0 6px 0 rgba(25,71,62,.16)}
@keyframes scene-actor-action{from{transform:translateX(-3px) rotate(-2deg)}to{transform:translateX(3px) rotate(2deg)}}
@keyframes scene-flight { 0%{transform:translate(-35%,18px) rotate(-8deg)}50%{transform:translate(0,-24px) rotate(5deg)}100%{transform:translate(35%,0) rotate(0)} }
@keyframes scene-study { 0%,100%{transform:translateY(12px)}50%{transform:translateY(-9px) rotate(-3deg)} }
@keyframes scene-breeze { 0%{transform:translateX(-25%) rotate(-5deg)}50%{transform:translateX(5%) rotate(5deg)}100%{transform:translateX(25%) rotate(-2deg)} }
@keyframes scene-handoff { 0%{transform:translateX(-30%)}45%{transform:translateX(0) scale(1.08)}100%{transform:translateX(30%)} }
@keyframes scene-pulse { 0%,100%{transform:scale(.92)}50%{transform:scale(1.18)} }
@keyframes scene-orbit { 0%{transform:translateX(-30%) rotate(-12deg)}50%{transform:translateY(-14px) rotate(12deg)}100%{transform:translateX(30%) rotate(0)} }
@keyframes scene-bounce { 0%,100%{transform:translateY(0)}35%{transform:translateY(-18px)}70%{transform:translateY(3px)} }
@keyframes scene-word-travel {
  0% { transform: translateX(-32%); }
  48% { transform: translateX(12%); }
  100% { transform: translateX(32%); }
}
@keyframes scene-speech-focus {
  from { border-color: #9fb9af; }
  to { border-color: var(--coral); box-shadow: 0 0 0 4px rgba(223,98,73,.12); }
}
@media (max-width: 900px) {
  .relation-lanes,
  .scene-studio { grid-template-columns: 1fr; }
  .scene-learning-panel { border-top: 1px solid var(--line); border-left: 0; }
}
@media (max-width: 560px) {
  .relation-map { padding: 10px; }
  .scene-set { grid-template-columns: 90px minmax(90px, 1fr) 100px; min-height: 220px; padding: 18px 10px 28px; }
  .scene-place { min-height: 104px; padding: 9px; }
  .scene-place svg { width: 32px; height: 32px; }
  .scene-person > svg { width: 46px; height: 46px; }
  .scene-speech small { display: none; }
  .scene-caption { min-height: 88px; padding: 10px 12px; }
  .scene-caption p { font-size: .78rem; }
  .scene-learning-panel { padding: 12px; }
  .scene-actions .btn { flex: 1 1 140px; }
  .scene-context-cue{left:8px;right:8px;top:8px;gap:5px}.scene-context-cue b{display:none}.scene-context-cue small{font-size:.48rem}.scene-place span{font-size:.58rem}
}
@media (prefers-reduced-motion: reduce) {
  .scene-studio.is-playing .scene-word-token,
  .scene-studio.is-playing .scene-speech { animation: none; }
  .scene-progress i { transition: none; }
}

/* Domestic movie-context discovery and reliable fallback states */
.movie-match-status{display:flex;align-items:flex-start;gap:11px;padding:13px 15px;border:1px solid #a9d6c5;background:#edf9f4;color:#174d41}.movie-match-status>svg{width:22px;flex:0 0 auto}.movie-match-status span{display:grid;gap:3px}.movie-match-status b{font-size:.72rem}.movie-match-status small{color:#476d64;font-size:.62rem;line-height:1.65}.movie-match-status.is-rare{border-color:#e6bd73;background:#fff8e7;color:#754f13}.movie-match-status.is-rare small{color:#775f36}.provider-type{justify-self:start;padding:3px 7px;border:1px solid #acd2c4;background:#edf9f4;color:#17634f;font-size:.52rem;font-weight:900}.provider-dictionary{grid-column:span 2;border-color:#d9bb79;background:#fffdf7}.provider-dictionary .movie-provider-icon{background:#8a661e}.provider-dictionary .provider-type{border-color:#dfc47f;background:#fff4d5;color:#735212}
/* Paid-access, wrong-book and competition experiences */
.movie-context-section{display:grid;gap:16px}.movie-context-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}.movie-provider{display:grid;grid-template-columns:48px minmax(0,1fr);gap:13px;align-items:start;padding:17px;border-color:#bdd5cc;color:var(--ink);text-decoration:none;transition:transform .18s ease,border-color .18s ease,box-shadow .18s ease}.movie-provider:hover,.movie-provider:focus-visible{transform:translateY(-3px);border-color:var(--green);box-shadow:0 12px 28px rgba(21,61,54,.12)}.movie-provider-icon{display:grid;place-items:center;width:48px;height:48px;border-radius:8px;background:#173f37;color:#fff}.movie-provider-icon svg{width:24px;height:24px}.movie-provider>span:last-child{display:grid;gap:7px}.movie-provider b{font-size:.82rem}.movie-provider small{color:var(--muted);font-size:.65rem;line-height:1.65}.movie-provider em{display:flex;align-items:center;gap:5px;color:var(--green-dark);font-size:.64rem;font-style:normal;font-weight:900}.movie-provider em svg{width:15px}.movie-caption-lab{display:grid;grid-template-columns:minmax(0,1fr) auto;align-items:center;gap:22px;padding:22px;border-left:5px solid var(--gold)}.movie-caption-lab h3{margin:12px 0 6px;font:800 1rem/1.65 Georgia,serif}.movie-caption-lab p{margin:0;color:var(--muted);font-size:.7rem;line-height:1.7}.movie-caption-actions{display:flex;align-items:center;gap:10px}.movie-caption-actions .speak-btn{width:44px;height:44px}.movie-source-note{display:flex;align-items:flex-start;gap:8px;margin:0;padding:10px 12px;border:1px solid var(--line);background:#f6faf8;color:var(--muted);font-size:.62rem;line-height:1.6}.movie-source-note svg{width:17px;flex:0 0 auto;color:var(--green-dark)}
@media(max-width:900px){.movie-context-grid{grid-template-columns:1fr}.provider-dictionary{grid-column:auto}.movie-caption-lab{grid-template-columns:1fr}.movie-caption-actions{justify-content:flex-start}}
@media(max-width:560px){.movie-provider{grid-template-columns:40px minmax(0,1fr);padding:13px}.movie-provider-icon{width:40px;height:40px}.movie-caption-lab{padding:15px}.movie-caption-actions .btn{flex:1}.movie-caption-lab h3{font-size:.9rem}}
.membership-choice{display:grid;gap:20px;max-width:920px;margin:22px auto}.membership-plans{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.membership-plan input{position:absolute;opacity:0}.membership-plan span{display:grid;gap:8px;min-height:205px;padding:24px;border:2px solid #c8d7d1;border-radius:18px;background:#fff;cursor:pointer;transition:.2s}.membership-plan strong{font-size:1.35rem;color:#0c745f}.membership-plan:has(input:checked) span{background:#e3f8ef;border-color:#0c876e;box-shadow:0 0 0 4px rgba(12,135,110,.14)}.membership-plan:has(input:checked) svg{color:#d65d38}.membership-price{display:inline-grid;place-items:center;min-width:145px;padding:12px 18px;border-radius:12px;background:#173f37;color:#fff;font-weight:800;font-size:1.25rem}.wrongbook-row{border-left:5px solid #d65d38}.competition-card{max-width:760px;margin:0 auto}.competition-card h2{line-height:1.55}.membership-promo{background:linear-gradient(135deg,#effbf7,#fff5ee)}.membership-priceboard{display:grid;grid-template-columns:1fr 1fr 1.25fr;gap:16px;margin-top:22px}.membership-priceboard article,.membership-priceboard aside{padding:20px;border-radius:16px;background:#fff;border:1px solid #c9dcd5}.membership-priceboard .featured{background:#173f37;color:#fff}.membership-priceboard strong{display:block;font-size:2rem;color:#d65d38}.membership-priceboard .featured strong{color:#ffd18e}
@media(max-width:720px){.membership-plans,.membership-priceboard{grid-template-columns:1fr}.membership-plan span{min-height:0}.membership-price{width:100%}}