:root {
  --brand-brown: #4a261d;
  --brand-white: #ffffff;
  --brand-orange: #fd5229;
  --brand-blue: #4079b6;
  --brand-yellow: #ffa600;
  --brown-900: #321711;
  --brown-700: #63362a;
  --cream: #fffdf9;
  --orange-soft: #fff0eb;
  --blue-soft: #eef5fc;
  --yellow-soft: #fff4d8;
  --ink: #2d211f;
  --muted: #746762;
  --line: #eaded8;
  --success: #287a55;
  --success-soft: #e9f6ef;
  --danger: #b83232;
  --danger-soft: #fff0f0;
  --shadow-sm: 0 4px 18px rgba(74, 38, 29, 0.08);
  --shadow-lg: 0 22px 70px rgba(50, 23, 17, 0.2);
  --radius-sm: 12px;
  --radius-md: 20px;
  --radius-lg: 30px;
  --font-zh: "Roboto", "Noto Sans TC", "Noto Sans CJK TC", sans-serif;
  --font-ja: "Roboto", "Noto Sans JP", "Noto Sans CJK JP", sans-serif;
}

* {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 84px;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--brand-white);
  font-family: var(--font-zh);
  font-weight: 400;
  line-height: 1.65;
}

:lang(ja) {
  font-family: var(--font-ja);
}

button,
input {
  font: inherit;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

a {
  color: inherit;
}

button:focus-visible,
a:focus-visible,
input:focus-visible,
.flashcard:focus-visible {
  outline: 3px solid var(--brand-yellow);
  outline-offset: 3px;
}

.container {
  width: min(1160px, calc(100% - 40px));
  margin-inline: auto;
}

.skip-link {
  position: fixed;
  left: 16px;
  top: -80px;
  z-index: 100;
  padding: 10px 16px;
  color: var(--brand-white);
  background: var(--brand-brown);
  border-radius: 0 0 10px 10px;
}

.skip-link:focus {
  top: 0;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  color: var(--brand-brown);
  background: rgba(255, 255, 255, 0.96);
  border-bottom: 3px solid var(--brand-orange);
  box-shadow: 0 3px 18px rgba(74, 38, 29, 0.08);
  backdrop-filter: blur(12px);
}

.header-inner,
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.header-inner {
  min-height: 76px;
}

.brand {
  display: inline-flex;
  align-items: center;
  color: var(--brand-brown);
  text-decoration: none;
}

.brand-logo {
  display: block;
  width: auto;
  height: 64px;
  object-fit: contain;
}

.main-nav {
  display: flex;
  gap: 4px;
}

.main-nav a {
  padding: 10px 13px;
  border-radius: 999px;
  color: var(--brand-brown);
  font-size: 14px;
  font-weight: 500;
  text-decoration: none;
}

.main-nav a:hover {
  background: rgba(255, 166, 0, 0.16);
}

.hero {
  position: relative;
  overflow: hidden;
  color: var(--brand-brown);
  background:
    radial-gradient(circle at 88% 22%, rgba(255, 166, 0, 0.14), transparent 25%),
    linear-gradient(135deg, var(--brand-white), #fffaf3);
  border-bottom: 1px solid var(--line);
}

.hero::before,
.hero::after {
  position: absolute;
  content: "";
  border-radius: 999px;
}

.hero::before {
  right: -80px;
  bottom: -140px;
  width: 360px;
  height: 360px;
  border: 70px solid rgba(253, 82, 41, 0.08);
}

.hero::after {
  right: 28%;
  top: 34px;
  width: 22px;
  height: 22px;
  background: var(--brand-yellow);
  transform: rotate(18deg);
}

.hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(320px, 0.7fr);
  align-items: center;
  gap: 42px;
  min-height: 330px;
  padding-block: 38px;
}

.eyebrow,
.section-kicker {
  color: var(--brand-orange);
  font-family: "Roboto", sans-serif;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.16em;
}

.hero .eyebrow,
.section-heading .section-kicker,
.modal-header .section-kicker,
.task-type {
  display: none;
}

.quiz-question .section-kicker {
  display: inline;
}

.hero h1 {
  max-width: 720px;
  margin: 0 0 10px;
  font-size: clamp(30px, 4vw, 46px);
  line-height: 1.12;
  letter-spacing: -0.03em;
}

.hero-copy > p {
  max-width: 640px;
  margin: 0;
  color: var(--muted);
  font-size: clamp(15px, 1.6vw, 18px);
}

.hero-actions,
.completion-actions,
.card-controls,
.modal-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.hero-actions {
  margin-top: 18px;
}

.hero-note {
  margin-top: 14px !important;
  color: var(--muted) !important;
  font-size: 13px !important;
}

.hero-panel {
  padding: 20px;
  color: var(--brand-brown);
  background: var(--brand-white);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  transform: rotate(0.6deg);
}

.level-badge {
  display: grid;
  place-items: center;
  width: 66px;
  height: 66px;
  margin: -48px auto 14px;
  color: var(--brand-brown);
  background: var(--brand-yellow);
  border: 5px solid var(--brand-white);
  border-radius: 50%;
  font-family: "Roboto", sans-serif;
  font-size: 27px;
  font-weight: 700;
}

.stat-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.stat-grid div {
  padding: 12px 8px;
  text-align: center;
  background: var(--cream);
  border-radius: var(--radius-sm);
}

.stat-grid strong,
.stat-grid span {
  display: block;
}

.stat-grid strong {
  color: var(--brand-orange);
  font-family: "Roboto", sans-serif;
  font-size: 27px;
  line-height: 1;
}

.stat-grid span {
  margin-top: 5px;
  color: var(--brown-700);
  font-size: 13px;
  font-weight: 500;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 11px 20px;
  border: 1px solid transparent;
  border-radius: 999px;
  cursor: pointer;
  font-size: 15px;
  font-weight: 700;
  line-height: 1.2;
  text-align: center;
  text-decoration: none;
  transition: transform 160ms ease, box-shadow 160ms ease, background 160ms ease;
}

.button:hover:not(:disabled) {
  transform: translateY(-2px);
}

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

.button-primary {
  color: var(--brand-white);
  background: var(--brand-brown);
  box-shadow: 0 5px 0 var(--brand-orange);
}

.hero .button-primary {
  color: var(--brand-brown);
  background: var(--brand-yellow);
  box-shadow: 0 5px 0 var(--brand-orange);
}

.button-secondary {
  color: var(--brand-white);
  background: var(--brand-blue);
}

.button-outline {
  color: var(--brand-blue);
  background: var(--brand-white);
  border-color: var(--brand-blue);
}

.button-ghost {
  color: var(--brand-brown);
  background: transparent;
  border-color: var(--line);
}

.button-small {
  min-height: 40px;
  padding: 8px 15px;
  font-size: 13px;
}

.announcement {
  background: var(--yellow-soft);
  border-bottom: 1px solid rgba(74, 38, 29, 0.2);
}

.announcement-inner {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 16px;
  min-height: 86px;
  padding-block: 14px;
}

.announcement-icon {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  color: var(--brand-white);
  background: var(--brand-orange);
  border-radius: 50%;
  font-family: "Roboto", sans-serif;
  font-weight: 700;
}

.announcement h2,
.announcement p {
  margin: 0;
}

.announcement h2 {
  font-size: 14px;
}

.announcement p {
  font-size: 14px;
}

.api-state {
  padding: 5px 10px;
  color: var(--brand-brown);
  background: rgba(255, 255, 255, 0.6);
  border-radius: 999px;
  font-size: 12px;
  font-weight: 700;
}

.api-state.is-online {
  color: var(--success);
  background: var(--success-soft);
}

.api-state.is-error {
  color: var(--danger);
  background: var(--danger-soft);
}

.section {
  padding-block: 84px;
}

#weekly {
  padding-top: 36px;
}

.section-tint {
  background: #f7fafd;
}

.section-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 32px;
}

.section-heading h1,
.section-heading h2,
.section-heading p {
  margin: 0;
}

.section-heading h1,
.section-heading h2 {
  margin-top: 4px;
  color: var(--brand-brown);
  font-size: clamp(28px, 4vw, 44px);
  line-height: 1.15;
}

.section-heading p {
  max-width: 720px;
  margin-top: 8px;
  color: var(--muted);
}

.text-link {
  color: var(--brand-blue);
  font-weight: 700;
  text-underline-offset: 4px;
}

.section-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 8px 18px;
}

.testing-banner {
  margin-bottom: 20px;
  padding: 11px 15px;
  color: var(--brown-700);
  background: var(--yellow-soft);
  border: 1px solid rgba(255, 166, 0, 0.45);
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 700;
}

.testing-banner a {
  margin-left: 8px;
  color: var(--brand-blue);
  text-underline-offset: 3px;
}

.standalone-page {
  background: #f7fafd;
}

.standalone-main {
  min-height: calc(100vh - 79px);
  background:
    radial-gradient(circle at 92% 2%, rgba(255, 166, 0, 0.14), transparent 24%),
    #f7fafd;
}

.standalone-section {
  padding-block: 38px 72px;
}

.standalone-heading,
.learning-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.standalone-heading {
  margin-bottom: 24px;
}

.standalone-heading h1,
.standalone-heading p,
.learning-topbar h2 {
  margin: 0;
}

.standalone-heading h1 {
  color: var(--brand-brown);
  font-size: clamp(30px, 4vw, 44px);
  line-height: 1.15;
}

.standalone-heading p {
  margin-top: 7px;
  color: var(--muted);
}

.unit-selector {
  display: grid;
  grid-template-columns: repeat(8, minmax(70px, 1fr));
  gap: 8px;
  margin-bottom: 22px;
}

.unit-select {
  min-height: 46px;
  color: var(--brand-blue);
  background: var(--brand-white);
  border: 1px solid #bfd3e6;
  border-radius: 12px;
  cursor: pointer;
  font-weight: 700;
}

.unit-select.is-active {
  color: var(--brand-white);
  background: var(--brand-blue);
  border-color: var(--brand-blue);
  box-shadow: 0 4px 0 #285b90;
}

.learning-surface {
  max-width: 900px;
  margin-inline: auto;
  padding: 26px;
  background: var(--brand-white);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}

.learning-topbar {
  margin-bottom: 20px;
}

.learning-topbar h2 {
  color: var(--brand-brown);
  font-size: clamp(22px, 3vw, 30px);
}

.header-back {
  width: auto !important;
  flex: 0 0 auto;
}

#leaderboard-page-content {
  min-height: 180px;
}

.task-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.task-card,
.compact-card,
.unit-card,
.leaderboard-card,
.empty-state {
  background: var(--brand-white);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

.task-card {
  position: relative;
  display: flex;
  flex-direction: column;
  min-height: 280px;
  padding: 24px;
  overflow: hidden;
}

.task-card::before {
  position: absolute;
  inset: 0 auto 0 0;
  width: 6px;
  content: "";
  background: var(--brand-orange);
}

.task-card.listening::before {
  background: var(--brand-blue);
}

.task-card.tutoring::before {
  background: #a65fa7;
}

.task-card.vocabulary::before {
  background: var(--brand-yellow);
}

.task-topline,
.compact-card-top,
.unit-card-top,
.leaderboard-title-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.task-type {
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.1em;
}

.status-chip {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  padding: 4px 10px;
  color: var(--muted);
  background: #f3efed;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 700;
}

.status-chip.open,
.status-chip.available {
  color: var(--success);
  background: var(--success-soft);
}

.status-chip.upcoming,
.status-chip.link_pending {
  color: var(--brown-700);
  background: var(--yellow-soft);
}

.status-chip.closed,
.status-chip.ended {
  color: var(--muted);
  background: #eeeae8;
}

.task-card h3 {
  margin: 26px 0 8px;
  color: var(--brand-brown);
  font-size: 25px;
}

.task-card .task-topline h3 {
  margin: 0;
}

.task-card p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.task-date-list {
  display: grid;
  gap: 5px;
  margin: 18px 0 22px;
  font-size: 13px;
}

.task-date-list span {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding-bottom: 5px;
  border-bottom: 1px dashed var(--line);
}

.task-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: auto;
}

.skeleton-card {
  min-height: 280px;
  border-radius: var(--radius-md);
  background: linear-gradient(100deg, #f3ece8 20%, #fff 40%, #f3ece8 60%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
}

@keyframes shimmer {
  to { background-position-x: -200%; }
}

.week-tabs {
  display: grid;
  grid-template-columns: repeat(8, minmax(76px, 1fr));
  gap: 8px;
  margin-bottom: 18px;
  overflow-x: auto;
  padding: 3px 3px 8px;
}

.week-tab {
  min-height: 50px;
  padding: 8px;
  color: var(--brand-blue);
  background: var(--brand-white);
  border: 1px solid #bfd3e6;
  border-radius: 12px;
  cursor: pointer;
  font-weight: 700;
  white-space: nowrap;
}

.week-tab[aria-selected="true"] {
  color: var(--brand-white);
  background: var(--brand-blue);
  box-shadow: 0 5px 0 #285b90;
}

.week-detail {
  min-height: 160px;
}

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

.compact-card {
  padding: 18px;
}

.compact-card h3,
.unit-card h3 {
  margin: 14px 0 4px;
  color: var(--brand-brown);
  font-size: 19px;
}

.compact-card p,
.unit-card p {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
}

.compact-card .button,
.unit-card .button {
  width: 100%;
  margin-top: 16px;
}

.vocabulary-section {
  color: var(--brand-brown);
  background:
    radial-gradient(circle at 92% 12%, rgba(255, 166, 0, 0.14), transparent 22%),
    linear-gradient(180deg, #fffdf9, #fff8ec);
  border-block: 1px solid var(--line);
}

.light-heading h2,
.light-heading p {
  color: var(--brand-brown);
}

.light-heading p {
  color: var(--muted);
  opacity: 1;
}

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

.unit-card {
  position: relative;
  padding: 20px;
  color: var(--brand-brown);
  transition: transform 160ms ease;
}

.unit-card:hover {
  transform: translateY(-4px);
}

.unit-number {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  color: var(--brand-brown);
  background: var(--brand-yellow);
  border-radius: 50%;
  font-family: "Roboto", sans-serif;
  font-size: 18px;
  font-weight: 700;
}

.empty-state {
  padding: 48px 24px;
  color: var(--muted);
  text-align: center;
}

.leaderboard-podium {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  align-items: end;
  gap: 14px;
  margin-bottom: 18px;
}

.leaderboard-card {
  padding: 22px;
}

.leaderboard-card.first {
  border: 3px solid var(--brand-yellow);
  transform: translateY(-10px);
}

.rank-circle {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  color: var(--brand-brown);
  background: var(--yellow-soft);
  border-radius: 50%;
  font-family: "Roboto", sans-serif;
  font-size: 18px;
  font-weight: 700;
}

.leaderboard-card h3 {
  margin: 20px 0 4px;
  font-family: "Roboto", var(--font-zh);
  font-size: 20px;
}

.leaderboard-score {
  margin-top: 16px;
  color: var(--brand-orange);
  font-family: "Roboto", sans-serif;
  font-size: 34px;
  font-weight: 700;
}

.leaderboard-score small {
  margin-left: 3px;
  color: var(--muted);
  font-size: 12px;
}

.score-breakdown {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-top: 16px;
  color: var(--muted);
  font-size: 12px;
}

.leaderboard-table-wrap {
  overflow-x: auto;
  background: var(--brand-white);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

.leaderboard-table {
  width: 100%;
  min-width: 680px;
  border-collapse: collapse;
}

.leaderboard-table th,
.leaderboard-table td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--line);
  text-align: center;
}

.leaderboard-table th:nth-child(2),
.leaderboard-table td:nth-child(2) {
  text-align: left;
}

.leaderboard-table th {
  color: var(--brown-700);
  background: var(--cream);
  font-size: 12px;
}

.site-footer {
  padding-block: 36px;
  color: #eadbd6;
  background: var(--brown-900);
}

.site-footer strong {
  color: var(--brand-white);
  font-size: 18px;
}

.site-footer p {
  margin: 4px 0 0;
  font-size: 13px;
}

.modal {
  width: min(620px, calc(100% - 28px));
  max-height: min(90vh, 900px);
  padding: 0;
  overflow: hidden;
  background: transparent;
  border: 0;
}

.modal-wide {
  width: min(920px, calc(100% - 28px));
}

.modal::backdrop {
  background: rgba(34, 17, 13, 0.74);
  backdrop-filter: blur(4px);
}

.modal-card {
  display: flex;
  flex-direction: column;
  max-height: 90vh;
  margin: 0;
  overflow: hidden;
  background: var(--brand-white);
  border: 1px solid var(--line);
  border-radius: 24px;
  box-shadow: var(--shadow-lg);
}

.modal-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 20px;
  padding: 22px 24px 18px;
  border-bottom: 1px solid var(--line);
}

.modal-header h2 {
  margin: 2px 0 0;
  color: var(--brand-brown);
  font-size: 26px;
}

.icon-button {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  flex: 0 0 auto;
  color: var(--brand-brown);
  background: var(--cream);
  border: 1px solid var(--line);
  border-radius: 50%;
  cursor: pointer;
  font-size: 26px;
  line-height: 1;
}

.modal-body {
  padding: 24px;
  overflow-y: auto;
}

.modal-intro {
  margin: 0 0 18px;
  padding: 14px 16px;
  background: var(--yellow-soft);
  border-radius: var(--radius-sm);
}

.modal-actions {
  justify-content: flex-end;
  padding: 16px 24px 22px;
  border-top: 1px solid var(--line);
}

.field {
  display: grid;
  gap: 7px;
  margin-bottom: 18px;
  color: var(--brand-brown);
  font-size: 14px;
  font-weight: 700;
}

.field input {
  width: 100%;
  min-height: 48px;
  padding: 10px 13px;
  color: var(--ink);
  background: var(--brand-white);
  border: 1px solid #cdbdb7;
  border-radius: 10px;
  font-family: "Roboto", var(--font-zh);
  font-weight: 500;
  text-transform: uppercase;
}

.field input:focus {
  border-color: var(--brand-blue);
  box-shadow: 0 0 0 3px rgba(64, 121, 182, 0.15);
  outline: none;
}

.field small {
  color: var(--muted);
  font-size: 12px;
  font-weight: 400;
}

.check-field {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 14px;
  color: var(--brand-brown);
  background: var(--cream);
  border-radius: 10px;
  cursor: pointer;
  font-weight: 500;
}

.check-field input {
  width: 20px;
  height: 20px;
  margin: 2px 0 0;
  accent-color: var(--brand-orange);
}

.form-message {
  min-height: 24px;
  margin-top: 14px;
  font-size: 13px;
  font-weight: 700;
}

.form-message.error {
  color: var(--danger);
}

.form-message.success {
  color: var(--success);
}

.learning-loading {
  padding: 80px 20px;
  color: var(--muted);
  text-align: center;
}

.progress-row {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: center;
  gap: 14px;
  margin-bottom: 18px;
  color: var(--brand-brown);
  font-family: "Roboto", sans-serif;
  font-size: 13px;
  font-weight: 700;
}

.progress-track {
  height: 8px;
  overflow: hidden;
  background: #eee5e1;
  border-radius: 999px;
}

.progress-track span {
  display: block;
  width: 0;
  height: 100%;
  background: var(--brand-orange);
  border-radius: inherit;
  transition: width 200ms ease;
}

.flashcard {
  width: 100%;
  height: 360px;
  padding: 0;
  perspective: 1100px;
  background: transparent;
  border: 0;
  cursor: pointer;
}

.flashcard-inner {
  position: relative;
  display: block;
  width: 100%;
  height: 100%;
  transform-style: preserve-3d;
  transition: transform 420ms cubic-bezier(.2,.75,.25,1);
}

.flashcard.is-flipped .flashcard-inner {
  transform: rotateY(180deg);
}

.flashcard-face {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 36px;
  backface-visibility: hidden;
  border-radius: 24px;
  box-shadow: inset 0 0 0 1px rgba(74, 38, 29, 0.12), var(--shadow-sm);
}

.flashcard-front {
  color: var(--brand-brown);
  background: var(--brand-yellow);
}

.flashcard-front small {
  margin-bottom: 20px;
  font-size: 13px;
}

.flashcard-front strong {
  font-size: clamp(40px, 8vw, 72px);
  line-height: 1.15;
}

.flashcard-back {
  gap: 10px;
  color: var(--brand-white);
  background: var(--brand-blue);
  transform: rotateY(180deg);
  text-align: center;
}

.flashcard-back .reading {
  font-size: 18px;
}

.flashcard-back strong {
  font-size: clamp(25px, 4vw, 38px);
}

.flashcard-back span:nth-last-child(-n + 2) {
  max-width: 660px;
  font-size: 15px;
}

.card-controls {
  justify-content: center;
  margin-top: 16px;
}

.completion-panel,
.quiz-submit-panel,
.quiz-result {
  margin-top: 28px;
  padding: 22px;
  background: var(--cream);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
}

.completion-panel h3,
.completion-panel p {
  margin: 0;
}

.completion-panel p {
  margin-top: 4px;
  color: var(--muted);
  font-size: 13px;
}

.compact-field {
  margin-top: 18px;
}

.quiz-questions {
  display: grid;
  gap: 18px;
}

.quiz-question {
  margin: 0;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
}

.quiz-question legend {
  width: 100%;
  padding: 0 0 14px;
  color: var(--brand-brown);
  font-weight: 700;
}

.quiz-options {
  display: grid;
  gap: 8px;
}

.quiz-option {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 11px 12px;
  background: var(--cream);
  border: 1px solid transparent;
  border-radius: 10px;
  cursor: pointer;
}

.quiz-option:hover {
  border-color: var(--brand-blue);
}

.quiz-option input {
  width: 18px;
  height: 18px;
  margin-top: 3px;
  accent-color: var(--brand-blue);
}

.quiz-result {
  color: var(--brand-brown);
  background: var(--success-soft);
  border-color: #acd7c2;
  text-align: center;
}

.quiz-result strong {
  display: block;
  color: var(--success);
  font-family: "Roboto", sans-serif;
  font-size: 42px;
}

.toast {
  position: fixed;
  right: 18px;
  bottom: 18px;
  z-index: 100;
  max-width: min(380px, calc(100% - 36px));
  padding: 13px 17px;
  color: var(--brand-white);
  background: var(--brand-brown);
  border-left: 5px solid var(--brand-yellow);
  border-radius: 12px;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  pointer-events: none;
  transform: translateY(20px);
  transition: opacity 180ms ease, transform 180ms ease;
}

.toast.show {
  opacity: 1;
  transform: translateY(0);
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.listening-access-panel {
  display: grid;
  gap: 18px;
  margin-top: 18px;
  padding: 18px;
  background: var(--blue-soft);
  border: 1px solid #bfd3e6;
  border-radius: var(--radius-sm);
}

.grammar-container {
  max-width: 1060px;
}

.grammar-heading {
  align-items: flex-end;
}

.grammar-eyebrow {
  display: inline-block;
  margin-bottom: 6px;
  color: var(--brand-orange);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.1em;
}

.grammar-notice {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 14px;
  margin-bottom: 22px;
  padding: 16px 18px;
  color: var(--brown-700);
  background: var(--yellow-soft);
  border: 1px solid rgba(255, 166, 0, 0.4);
  border-radius: var(--radius-sm);
}

.grammar-notice strong,
.grammar-notice p {
  margin: 0;
}

.grammar-meta {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
  margin-bottom: 20px;
}

.grammar-meta span {
  display: grid;
  gap: 2px;
  padding: 12px 14px;
  color: var(--muted);
  background: var(--brand-white);
  border: 1px solid var(--line);
  border-radius: 12px;
  font-size: 14px;
}

.grammar-meta b {
  color: var(--brand-brown);
  font-size: 12px;
}

.grammar-sections {
  display: grid;
  gap: 28px;
}

.grammar-section {
  overflow: hidden;
  background: var(--brand-white);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}

.grammar-section-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 15px 22px;
  color: var(--brand-white);
  background: var(--brand-brown);
}

.grammar-section-heading span {
  font-size: 20px;
  font-weight: 700;
}

.grammar-section-heading small {
  padding: 3px 10px;
  color: var(--brand-brown);
  background: var(--brand-yellow);
  border-radius: 999px;
  font-weight: 700;
}

.grammar-reading {
  display: grid;
  gap: 14px;
  padding: 24px;
  background: #fffdf9;
  border-bottom: 1px solid var(--line);
}

.grammar-instruction,
.grammar-passage {
  margin: 0;
}

.grammar-instruction {
  padding: 12px 15px;
  color: var(--brand-brown);
  background: var(--orange-soft);
  border-left: 4px solid var(--brand-orange);
  border-radius: 8px;
  font-weight: 700;
}

.grammar-passage {
  padding: 18px;
  color: #231b19;
  background: var(--brand-white);
  border: 1px solid var(--line);
  border-radius: 12px;
  font-size: 17px;
  line-height: 2;
}

.grammar-table-wrap {
  overflow-x: auto;
  background: var(--brand-white);
  border: 1px solid var(--line);
  border-radius: 12px;
}

.grammar-reading-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 16px;
  line-height: 1.8;
}

.grammar-reading-table td {
  min-width: 160px;
  padding: 14px 16px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}

.grammar-reading-table tr:last-child td {
  border-bottom: 0;
}

.grammar-reading-table td:last-child {
  border-right: 0;
}

.grammar-question-list {
  display: grid;
  gap: 18px;
  padding: 24px;
}

.grammar-question {
  margin: 0;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 16px;
  transition: border-color 160ms ease, box-shadow 160ms ease;
}

.grammar-question legend {
  width: 100%;
  padding: 0 0 12px;
  color: var(--brand-brown);
  font-size: 17px;
  font-weight: 700;
  line-height: 1.7;
}

.grammar-question-number {
  display: inline-grid;
  place-items: center;
  width: 32px;
  height: 32px;
  margin-right: 9px;
  color: var(--brand-white);
  background: var(--brand-blue);
  border-radius: 50%;
  font-family: Roboto, sans-serif;
}

.grammar-options {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.grammar-option {
  cursor: pointer;
}

.grammar-option input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.grammar-option > span {
  display: grid;
  grid-template-columns: 30px 1fr;
  align-items: start;
  min-height: 58px;
  padding: 12px 14px;
  background: var(--brand-white);
  border: 1px solid #cfdce8;
  border-radius: 12px;
  transition: border-color 150ms ease, background 150ms ease, box-shadow 150ms ease;
}

.grammar-option b {
  color: var(--brand-blue);
  font-family: Roboto, sans-serif;
}

.grammar-option:hover > span,
.grammar-option input:checked + span {
  background: var(--blue-soft);
  border-color: var(--brand-blue);
}

.grammar-option input:checked + span {
  box-shadow: 0 0 0 2px rgba(64, 121, 182, 0.2);
}

.grammar-option input:focus-visible + span {
  outline: 3px solid var(--brand-yellow);
  outline-offset: 2px;
}

.grammar-question.has-error {
  border-color: var(--danger);
  box-shadow: 0 0 0 3px rgba(184, 50, 50, 0.1);
}

.grammar-question.is-wrong {
  border-color: var(--brand-orange);
  background: var(--orange-soft);
}

.grammar-submit-panel {
  display: grid;
  gap: 18px;
  max-width: 760px;
  margin: 30px auto 0;
  padding: 28px;
  background: var(--brand-white);
  border: 2px solid var(--brand-brown);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}

.grammar-submit-panel h2,
.grammar-submit-panel p {
  margin: 0;
}

.grammar-submit-panel h2 {
  color: var(--brand-brown);
}

.grammar-submit-panel p {
  color: var(--muted);
}

.grammar-submit-button {
  width: 100%;
}

.grammar-result {
  max-width: 760px;
  margin: 30px auto 0;
  padding: 32px;
  color: var(--brand-brown);
  background: var(--success-soft);
  border: 2px solid var(--success);
  border-radius: var(--radius-lg);
  text-align: center;
}

.grammar-result h2,
.grammar-result p {
  margin: 6px 0;
}

.grammar-result > strong {
  display: block;
  margin: 12px 0;
  color: var(--success);
  font-family: Roboto, sans-serif;
  font-size: clamp(42px, 8vw, 72px);
  line-height: 1;
}

.result-kicker {
  color: var(--success);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.1em;
}

.result-note {
  color: var(--muted);
}

.grammar-result-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  margin-top: 20px;
}

.learning-loading.is-error {
  display: grid;
  justify-items: center;
  gap: 14px;
  color: var(--danger);
  background: var(--danger-soft);
}

@media (max-width: 980px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }

  .hero-panel {
    max-width: 620px;
  }

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

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

  .week-tabs {
    grid-template-columns: repeat(8, minmax(90px, 1fr));
  }
}

@media (max-width: 760px) {
  html {
    scroll-padding-top: 68px;
  }

  .container {
    width: min(100% - 28px, 1160px);
  }

  .header-inner {
    min-height: 66px;
  }

  .brand-logo {
    height: 52px;
  }

  .main-nav {
    display: none;
  }

  .hero-grid {
    min-height: auto;
    padding-block: 24px 30px;
  }

  .hero h1 {
    font-size: clamp(22px, 5.6vw, 26px);
  }

  .hero-copy > p {
    font-size: 14px;
    line-height: 1.5;
  }

  .hero-actions {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 8px;
    margin-top: 14px;
  }

  .hero-actions .button {
    width: 100%;
    min-height: 40px;
    padding: 8px 10px;
    font-size: 13px;
  }

  .hero-note {
    margin-top: 10px !important;
    font-size: 11px !important;
    line-height: 1.45 !important;
  }

  .hero-panel {
    padding: 12px;
    transform: none;
  }

  .level-badge {
    width: 48px;
    height: 48px;
    margin: -34px auto 8px;
    border-width: 4px;
    font-size: 21px;
  }

  .stat-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 5px;
  }

  .stat-grid div {
    padding: 8px 2px;
  }

  .stat-grid strong {
    font-size: 22px;
  }

  .stat-grid span {
    margin-top: 3px;
    font-size: 11px;
  }

  .announcement-inner {
    grid-template-columns: auto 1fr;
  }

  .api-state {
    grid-column: 2;
    justify-self: start;
  }

  .section {
    padding-block: 64px;
  }

  #weekly {
    padding-top: 24px;
  }

  .section-heading {
    display: grid;
    align-items: start;
  }

  .section-links {
    justify-content: flex-start;
  }

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

  .standalone-section {
    padding-block: 24px 54px;
  }

  .standalone-heading {
    align-items: flex-start;
  }

  .learning-surface {
    padding: 18px;
    border-radius: var(--radius-md);
  }

  .task-grid,
  .leaderboard-podium {
    grid-template-columns: 1fr;
  }

  .leaderboard-card.first {
    transform: none;
  }

  .footer-inner {
    display: grid;
  }

  .flashcard {
    height: 330px;
  }
}

@media (max-width: 520px) {
  .container {
    width: min(100% - 24px, 1160px);
  }

  .completion-actions,
  .modal-actions {
    display: grid;
    grid-template-columns: 1fr;
  }

  .button {
    width: 100%;
  }

  .standalone-heading,
  .learning-topbar {
    display: grid;
  }

  .standalone-heading .button,
  .learning-topbar .button {
    width: 100%;
  }

  .standalone-heading h1 {
    font-size: 28px;
  }

  .unit-select {
    min-height: 42px;
    font-size: 13px;
  }

  .compact-grid,
  .unit-grid {
    grid-template-columns: 1fr 1fr;
  }

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

  .compact-card,
  .unit-card {
    padding: 15px;
  }

  .modal {
    width: 100%;
    max-height: 100dvh;
    margin: auto 0 0;
  }

  .modal-card {
    max-height: 94dvh;
    border-radius: 22px 22px 0 0;
  }

  .modal-header,
  .modal-body,
  .modal-actions {
    padding-inline: 18px;
  }

  .flashcard {
    height: 360px;
  }

  .flashcard-face {
    padding: 24px 18px;
  }

  .site-header {
    border-bottom-width: 2px;
  }

  .header-inner {
    min-height: 52px;
  }

  .brand-logo {
    height: 42px;
  }

  #weekly {
    padding-block: 14px 26px;
  }

  #weekly .testing-banner {
    margin-bottom: 10px;
    padding: 8px 10px;
    font-size: 12px;
    line-height: 1.4;
  }

  #weekly .testing-banner a {
    margin-left: 4px;
  }

  #weekly .section-heading {
    gap: 6px;
    margin-bottom: 12px;
  }

  #weekly .section-heading h1 {
    font-size: 27px;
    line-height: 1.2;
  }

  #weekly .section-heading p {
    margin-top: 4px;
    font-size: 13px;
    line-height: 1.45;
  }

  #weekly .section-links {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 6px;
    width: 100%;
    font-size: 14px;
    line-height: 1.25;
  }

  #weekly .section-links .text-link {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 44px;
    padding: 7px 5px;
    color: var(--brand-blue);
    background: var(--blue-soft);
    border: 1px solid #a9c8e5;
    border-radius: 10px;
    text-align: center;
    text-decoration: none;
  }

  #weekly .task-grid {
    gap: 9px;
  }

  #weekly .task-card {
    min-height: 0;
    padding: 11px 14px 11px 18px;
    border-radius: 14px;
  }

  #weekly .task-card::before {
    width: 4px;
  }

  #weekly .status-chip {
    min-height: 25px;
    padding: 3px 8px;
    font-size: 12px;
  }

  #weekly .task-card h3 {
    margin: 0;
    font-size: 21px;
    line-height: 1.25;
  }

  #weekly .task-topline {
    align-items: center;
  }

  #weekly .task-card > p {
    display: none;
  }

  #weekly .task-date-list {
    gap: 1px;
    margin: 6px 0 8px;
    font-size: 13px;
    line-height: 1.35;
  }

  #weekly .task-date-list span {
    padding-bottom: 2px;
  }

  #weekly .task-actions {
    display: grid;
    grid-template-columns: 1fr;
    gap: 5px;
    margin-top: 0;
  }

  #weekly .task-card.grammar .task-actions,
  #weekly .task-card.listening .task-actions {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  #weekly .task-actions .button {
    min-height: 37px;
    padding: 7px;
    font-size: 13px;
  }
}

@media (max-width: 760px) {
  .grammar-meta {
    grid-template-columns: 1fr 1fr;
  }

  .grammar-options {
    grid-template-columns: 1fr;
  }

  .grammar-reading,
  .grammar-question-list {
    padding: 16px;
  }

  .grammar-question {
    padding: 16px;
  }
}

@media (max-width: 520px) {
  .grammar-heading {
    margin-bottom: 16px;
  }

  .grammar-notice {
    grid-template-columns: 1fr;
    gap: 5px;
  }

  .grammar-section {
    border-radius: 18px;
  }

  .grammar-section-heading {
    padding: 12px 16px;
  }

  .grammar-passage,
  .grammar-reading-table {
    font-size: 15px;
  }

  .grammar-submit-panel,
  .grammar-result {
    padding: 20px 16px;
    border-radius: 18px;
  }
}

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