:root {
  --ink: #17201f;
  --muted: #5d6865;
  --paper: #f8f4eb;
  --panel: #fffdf7;
  --line: #d8d0c0;
  --blue: #173f79;
  --green: #0f7a61;
  --gold: #c9982f;
  --red: #b33b32;
  --shadow: 0 24px 70px rgba(33, 35, 30, 0.13);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  background:
    linear-gradient(120deg, rgba(23, 63, 121, 0.08), transparent 34%),
    radial-gradient(circle at 80% 10%, rgba(201, 152, 47, 0.18), transparent 30%),
    var(--paper);
  font-family: Georgia, "Times New Roman", serif;
}

button,
input {
  font: inherit;
}

button {
  border: 0;
  cursor: pointer;
}

.shell {
  display: grid;
  grid-template-columns: 320px minmax(0, 1fr);
  min-height: 100vh;
}

.sidebar {
  position: sticky;
  top: 0;
  height: 100vh;
  padding: 28px;
  background: #102b55;
  color: #fffdf7;
  overflow-y: auto;
}

.brand {
  display: flex;
  gap: 14px;
  align-items: center;
  padding-bottom: 28px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.22);
}

.brand-mark {
  width: 54px;
  height: 54px;
  display: block;
  object-fit: cover;
  object-position: center;
  border-radius: 8px;
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.55);
}

.eyebrow {
  margin: 0 0 6px;
  color: currentColor;
  opacity: 0.68;
  font: 700 0.72rem/1.2 Verdana, Geneva, sans-serif;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  margin: 0;
  line-height: 1.04;
}

h1 {
  font-size: 1.55rem;
}

h2 {
  max-width: 850px;
  font-size: clamp(2rem, 4vw, 4.4rem);
}

h3 {
  font-size: clamp(1.55rem, 2vw, 2.2rem);
}

.nav-tabs {
  display: grid;
  gap: 10px;
  margin-top: 30px;
}

.seo-links {
  display: grid;
  gap: 8px;
  margin-top: 16px;
  padding: 14px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.06);
}

.seo-links a {
  color: #fffdf7;
  font: 700 0.82rem/1.35 Verdana, Geneva, sans-serif;
  text-decoration: none;
  opacity: 0.86;
}

.seo-links a:hover {
  opacity: 1;
  text-decoration: underline;
  text-underline-offset: 4px;
}

.tab {
  min-height: 46px;
  padding: 0 14px;
  color: rgba(255, 253, 247, 0.84);
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 8px;
  text-align: left;
}

.tab.is-active {
  background: #fffdf7;
  color: #102b55;
}

.vip-tab {
  color: #102b55;
  background: #f5d176;
  border-color: rgba(245, 209, 118, 0.85);
  font-weight: 900;
}

.vip-tab.is-active {
  color: #102b55;
  background: #fff3bd;
}

.tab.is-locked,
.chapter-tab.is-locked,
.set-button.is-locked {
  opacity: 0.58;
}

.tab.is-locked::after {
  content: "Locked";
  float: right;
  font: 800 0.62rem/1 Verdana, Geneva, sans-serif;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.exam-rule {
  margin-top: 32px;
  padding: 18px;
  background: rgba(0, 0, 0, 0.17);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 8px;
}

.exam-rule strong,
.exam-rule span {
  display: block;
}

.exam-rule strong {
  margin-bottom: 8px;
  font-size: 1.35rem;
}

.account-panel {
  display: grid;
  gap: 12px;
  margin-top: 18px;
  padding: 18px;
  background: rgba(255, 253, 247, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 8px;
}

.account-panel strong,
.account-panel span {
  display: block;
}

.account-panel strong {
  font-size: 1.05rem;
}

.account-panel span,
.account-panel p {
  margin: 0;
  color: rgba(255, 253, 247, 0.76);
  line-height: 1.35;
}

.account-actions {
  display: grid;
  gap: 8px;
}

.account-actions .ghost {
  color: #fffdf7;
  border-color: rgba(255, 255, 255, 0.28);
}

.button-like {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 14px;
  border: 1px solid currentColor;
  border-radius: 8px;
  text-align: center;
  text-decoration: none;
  font: 800 0.95rem/1 Verdana, Geneva, sans-serif;
}

.account-subscribe-button {
  min-height: 52px;
  background: #118267;
}

.account-divider {
  height: 1px;
  margin: 4px 0;
  background: rgba(255, 255, 255, 0.18);
}

.sidebar-code-field {
  display: grid;
  gap: 6px;
  color: rgba(255, 253, 247, 0.82);
  font: 800 0.74rem/1.2 Verdana, Geneva, sans-serif;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.sidebar-code-field input {
  min-height: 40px;
  width: 100%;
  padding: 0 10px;
  color: var(--ink);
  background: #fffdf7;
  border: 1px solid rgba(255, 255, 255, 0.28);
  border-radius: 8px;
  outline: none;
  text-transform: uppercase;
}

.account-message {
  min-height: 18px;
  color: #f5d176 !important;
  font-weight: 800;
}

.access-contact {
  display: grid;
  gap: 10px;
  margin-top: 4px;
  padding-top: 14px;
  border-top: 1px solid rgba(255, 255, 255, 0.18);
}

.access-contact a {
  color: #f5d176;
  font-weight: 800;
  word-break: break-word;
}

.access-contact .payment-link-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 0 12px;
  border-radius: 8px;
  background: #118267;
  color: #fffdf7;
  text-decoration: none;
  text-align: center;
}

.access-contact img {
  display: block;
  width: min(100%, 190px);
  aspect-ratio: 1;
  object-fit: contain;
  padding: 8px;
  background: #fff;
  border-radius: 8px;
}

.main {
  min-width: 0;
  padding: 28px;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 260px;
  gap: 28px;
  align-items: end;
  min-height: 340px;
  padding: clamp(28px, 5vw, 54px);
  background:
    linear-gradient(135deg, rgba(16, 43, 85, 0.92), rgba(22, 66, 71, 0.82)),
    url("https://upload.wikimedia.org/wikipedia/commons/thumb/b/b9/Flag_of_Australia.svg/1280px-Flag_of_Australia.svg.png");
  background-position: center;
  background-size: cover;
  border-radius: 8px;
  color: #fffdf7;
  box-shadow: var(--shadow);
}

.hero-meter {
  display: grid;
  gap: 10px;
}

.hero-meter span {
  padding: 14px 16px;
  background: rgba(255, 253, 247, 0.14);
  border: 1px solid rgba(255, 253, 247, 0.24);
  border-radius: 8px;
  font: 800 1rem/1 Verdana, Geneva, sans-serif;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.hero-actions button {
  min-height: 54px;
  padding-inline: 18px;
  border-radius: 8px;
  font-size: 0.98rem;
}

.hero-subscribe {
  background: #118267;
}

.hero-account {
  color: #fffdf7;
  border-color: rgba(42, 184, 139, 0.9);
  background: #12876c;
  box-shadow: 0 12px 26px rgba(9, 75, 60, 0.24);
}

.hero-account:hover {
  background: #159878;
  border-color: rgba(80, 218, 171, 0.95);
}

.view {
  display: none;
  margin-top: 28px;
}

.view.is-visible {
  display: block;
}

.section-head {
  display: flex;
  gap: 18px;
  align-items: end;
  justify-content: space-between;
  margin-bottom: 18px;
}

.search {
  display: grid;
  gap: 6px;
  min-width: min(360px, 100%);
  color: var(--muted);
  font: 700 0.78rem/1.2 Verdana, Geneva, sans-serif;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.search input {
  min-height: 44px;
  padding: 0 14px;
  color: var(--ink);
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  outline: none;
}

.study-note {
  max-width: 390px;
  margin: 0;
  color: var(--muted);
  text-align: right;
}

.chapter-nav {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
  margin-bottom: 18px;
}

.chapter-tab {
  display: grid;
  gap: 5px;
  min-height: 136px;
  padding: 14px;
  color: var(--ink);
  background: rgba(255, 253, 247, 0.92);
  border: 1px solid var(--line);
  border-radius: 8px;
  text-align: left;
}

.chapter-tab.is-active {
  color: #fffdf7;
  background: var(--blue);
  border-color: var(--blue);
}

.chapter-tab span,
.chapter-tab small {
  font: 800 0.72rem/1.2 Verdana, Geneva, sans-serif;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  opacity: 0.72;
}

.chapter-tab strong {
  font-size: 1rem;
  line-height: 1.15;
}

.chapter-tab em {
  color: inherit;
  font-style: normal;
  opacity: 0.78;
}

.chapter-tab .lock-note {
  color: var(--gold);
  opacity: 1;
}

.chapter-panel {
  display: grid;
  gap: 16px;
}

.chapter-lesson,
.teaching-step,
.chapter-quiz {
  background: rgba(255, 253, 247, 0.92);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 12px 30px rgba(33, 35, 30, 0.08);
}

.chapter-lesson {
  display: grid;
  grid-template-columns: minmax(280px, 0.95fr) minmax(0, 1.05fr);
  overflow: hidden;
}

.chapter-visual {
  min-height: 320px;
  background: #e9dfcd;
}

.chapter-visual img {
  display: block;
  width: 100%;
  height: 100%;
  min-height: 320px;
  object-fit: contain;
}

.chapter-copy {
  display: grid;
  align-content: center;
  gap: 12px;
  padding: clamp(22px, 4vw, 42px);
}

.chapter-copy h4,
.teaching-step h4 {
  margin: 0;
  font-size: clamp(1.6rem, 3vw, 3rem);
  line-height: 1.04;
}

.zh-title,
.translation {
  margin: 0;
  color: var(--muted);
}

.zh-title {
  font-size: 1.2rem;
  font-weight: 700;
}

.keyword-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 6px;
}

.keyword-strip span {
  display: grid;
  gap: 3px;
  padding: 9px 10px;
  background: #f1eadb;
  border-radius: 8px;
}

.keyword-strip strong,
.keyword-strip em,
.option em {
  font-family: Verdana, Geneva, sans-serif;
}

.keyword-strip strong {
  color: var(--blue);
  font-size: 0.78rem;
}

.keyword-strip em,
.option em {
  color: var(--muted);
  font-size: 0.78rem;
  font-style: normal;
}

.teaching-step,
.chapter-quiz {
  padding: 20px;
}

.step-meter {
  display: flex;
  gap: 8px;
  margin-bottom: 16px;
}

.step-meter button {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  color: var(--blue);
  background: #e8edf4;
  border-radius: 50%;
  font: 900 0.9rem/1 Verdana, Geneva, sans-serif;
}

.step-meter button.is-active {
  color: #fff;
  background: var(--blue);
}

.bilingual-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.bilingual-grid > div {
  display: grid;
  gap: 10px;
  padding: 18px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.memory-box {
  padding: 12px;
  color: var(--blue);
  background: #e8edf4;
  border-radius: 8px;
  font-weight: 700;
}

.question .option span:last-child,
.bilingual-question .option span:last-child {
  display: grid;
  gap: 4px;
}

.question .option strong,
.bilingual-question .option strong {
  font-weight: 700;
}

.lang-toggle {
  min-height: 34px;
  padding: 0 12px;
}

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

.study-card,
.quiz-panel,
.history-item {
  background: rgba(255, 253, 247, 0.9);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 12px 30px rgba(33, 35, 30, 0.08);
}

.study-card {
  padding: 18px;
}

.study-card h4 {
  margin: 0 0 10px;
  font-size: 1.08rem;
}

.study-card ul {
  display: grid;
  gap: 7px;
  margin: 0;
  padding-left: 18px;
  color: var(--muted);
}

.primary,
.ghost {
  min-height: 44px;
  padding: 0 16px;
  border-radius: 8px;
  font: 800 0.85rem/1 Verdana, Geneva, sans-serif;
}

.primary {
  background: var(--green);
  color: #fff;
}

.primary:disabled,
.ghost:disabled,
.option:disabled {
  cursor: not-allowed;
}

.ghost {
  color: var(--blue);
  background: transparent;
  border: 1px solid var(--line);
}

.hero-actions .hero-account {
  color: #fffdf7;
  background: #118267;
  border-color: rgba(80, 218, 171, 0.86);
  box-shadow: 0 12px 26px rgba(9, 75, 60, 0.24);
}

.hero-actions .hero-account:hover {
  background: #159878;
  border-color: rgba(114, 235, 192, 0.95);
}

.timer {
  min-width: 126px;
  padding: 12px 16px;
  color: #fffdf7;
  background: var(--ink);
  border-radius: 8px;
  text-align: center;
  font: 900 1.45rem/1 Verdana, Geneva, sans-serif;
}

.test-picker {
  display: grid;
  grid-template-columns: repeat(10, minmax(0, 1fr));
  gap: 8px;
  margin-bottom: 18px;
}

.set-button {
  position: relative;
  aspect-ratio: 1;
  color: var(--blue);
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  font-weight: 800;
}

.set-button.is-active {
  color: #fff;
  background: var(--blue);
}

.set-button .lock-dot {
  position: absolute;
  right: 6px;
  top: 6px;
  width: 9px;
  height: 9px;
  background: var(--gold);
  border-radius: 50%;
}

.test-set-button {
  display: grid;
  place-items: center;
  gap: 3px;
  padding: 6px;
}

.test-set-button span {
  font-size: 1.05rem;
  line-height: 1;
}

.test-set-button small {
  color: var(--muted);
  font: 800 0.62rem/1 Verdana, Geneva, sans-serif;
}

.test-set-button.is-active small {
  color: rgba(255, 255, 255, 0.78);
}

.mock-picker {
  grid-template-columns: repeat(10, minmax(0, 1fr));
}

.vocab-picker {
  grid-template-columns: repeat(10, minmax(0, 1fr));
}

.vocab-set-button {
  display: grid;
  place-items: center;
  gap: 3px;
  padding: 6px;
}

.vocab-set-button span {
  font-size: 1.05rem;
  line-height: 1;
}

.vocab-set-button small {
  color: var(--muted);
  font: 800 0.62rem/1 Verdana, Geneva, sans-serif;
}

.vocab-set-button.is-active small {
  color: rgba(255, 255, 255, 0.78);
}

.daily-scenario-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 10px;
  margin-bottom: 18px;
}

.daily-card {
  display: grid;
  gap: 7px;
  min-height: 124px;
  padding: 14px;
  color: var(--ink);
  background: rgba(255, 253, 247, 0.92);
  border: 1px solid var(--line);
  border-radius: 8px;
  text-align: left;
  box-shadow: 0 10px 24px rgba(33, 35, 30, 0.08);
}

.daily-card span {
  width: max-content;
  padding: 4px 8px;
  color: #fff;
  background: var(--blue);
  border-radius: 999px;
  font: 900 0.72rem/1 Verdana, Geneva, sans-serif;
}

.daily-card strong {
  font-size: 1rem;
}

.daily-card em,
.daily-card small {
  color: var(--muted);
  font-style: normal;
}

.daily-card.is-active {
  color: #fff;
  background: var(--blue);
  border-color: var(--blue);
}

.daily-card.is-active span {
  color: var(--blue);
  background: #fff;
}

.daily-card.is-active em,
.daily-card.is-active small {
  color: rgba(255, 255, 255, 0.78);
}

.quiz-panel {
  padding: 20px;
}

.empty-state {
  min-height: 160px;
  display: grid;
  place-items: center;
  color: var(--muted);
  text-align: center;
}

.quiz-top {
  display: flex;
  gap: 12px;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 18px;
}

.vocab-top {
  align-items: flex-start;
}

.vocab-question {
  display: grid;
  gap: 14px;
}

.vocab-mode-note {
  margin: 0;
  color: var(--muted);
  font: 900 0.78rem/1.35 Verdana, Geneva, sans-serif;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.vocab-question h4 {
  margin: 0;
  padding: 8px 0 2px;
  font-size: clamp(2rem, 5vw, 4.25rem);
}

.vocab-question-nav {
  margin-top: 18px;
}

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

.daily-lesson-head {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 18px;
}

.daily-lesson-head h3 {
  margin: 0 0 6px;
  font-size: clamp(1.6rem, 2vw, 2.2rem);
}

.daily-question-nav {
  margin: 18px 0;
}

.daily-result .translation {
  max-width: 760px;
}

.pill-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.pill {
  padding: 7px 10px;
  color: var(--muted);
  background: #f1eadb;
  border-radius: 8px;
  font: 800 0.72rem/1 Verdana, Geneva, sans-serif;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.pill.value {
  color: #fff;
  background: var(--red);
}

.pill.answer-status {
  min-width: 92px;
  text-align: center;
}

.pill.answer-status.is-correct {
  color: #fff;
  background: var(--green);
}

.pill.answer-status.is-wrong {
  color: #fff;
  background: var(--red);
}

.question {
  display: grid;
  gap: 14px;
}

.question h4 {
  margin: 0;
  font-size: clamp(1.45rem, 2vw, 2rem);
}

.with-speech,
.study-speech-line {
  display: flex;
  gap: 10px;
  align-items: flex-start;
}

.with-speech .speak-button,
.study-speech-line .speak-button {
  flex: 0 0 auto;
  margin-top: 0.1em;
}

.speak-button {
  display: inline-grid;
  place-items: center;
  width: 38px;
  height: 38px;
  color: var(--blue);
  background: #edf6fb;
  border: 1px solid #c5deec;
  border-radius: 50%;
  cursor: pointer;
}

.speak-button:hover,
.speak-button:focus-visible {
  color: #fff;
  background: var(--blue);
  outline: none;
}

.speak-button svg {
  width: 19px;
  height: 19px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2.2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.options {
  display: grid;
  gap: 10px;
}

.option-line {
  display: block;
}

.option-line.with-option-speech {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  gap: 10px;
  align-items: center;
}

.option-line.with-option-speech > .speak-button {
  justify-self: center;
}

.option {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 10px;
  align-items: center;
  min-height: 54px;
  padding: 10px;
  color: var(--ink);
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  text-align: left;
}

.option span:first-child {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  color: var(--blue);
  background: #e8edf4;
  border-radius: 8px;
  font: 900 0.9rem/1 Verdana, Geneva, sans-serif;
}

.option.correct {
  border-color: var(--green);
  background: #edf8f3;
}

.option.wrong {
  border-color: var(--red);
  background: #fff0ed;
}

.feedback {
  padding: 14px;
  background: #f4eddf;
  border-left: 5px solid var(--gold);
  border-radius: 8px;
  color: var(--muted);
}

.quiz-actions {
  display: flex;
  gap: 10px;
  justify-content: space-between;
  margin-top: 18px;
}

.result {
  display: grid;
  gap: 14px;
}

.result-title {
  font-size: clamp(2rem, 4vw, 3.6rem);
}

.result.pass {
  color: var(--green);
}

.result.fail {
  color: var(--red);
}

.official-start,
.official-test,
.official-result {
  overflow: hidden;
  color: #080f24;
  background: #fff;
  border: 1px solid #d9dee8;
  border-radius: 4px;
  box-shadow: 0 8px 24px rgba(8, 15, 36, 0.08);
}

.official-header {
  display: grid;
  gap: 24px;
  justify-items: center;
  padding: 28px 0 0;
  text-align: center;
  background: #fff;
}

.official-brand {
  display: flex;
  align-items: center;
  gap: 16px;
  min-width: min(560px, 92%);
  color: #050505;
  text-align: left;
}

.official-crest {
  display: grid;
  place-items: center;
  width: 82px;
  height: 58px;
  color: #050505;
  border: 2px solid #050505;
  font: 900 1rem/1 Verdana, Geneva, sans-serif;
}

.official-brand strong,
.official-brand span {
  display: block;
  font-family: Georgia, "Times New Roman", serif;
  font-weight: 800;
  line-height: 1.15;
}

.official-brand strong {
  padding-bottom: 5px;
  border-bottom: 3px solid #050505;
  font-size: clamp(1.4rem, 2vw, 2.1rem);
}

.official-brand span {
  padding-top: 5px;
  font-size: clamp(1.15rem, 1.7vw, 1.7rem);
}

.official-header h2 {
  margin: 0;
  font-size: clamp(2rem, 3.1vw, 3.5rem);
  font-weight: 900;
}

.official-header p {
  margin: -8px 0 18px;
  font-size: clamp(1.45rem, 2.4vw, 2.7rem);
  line-height: 1.1;
}

.wattle-strip {
  width: 100%;
  height: 54px;
  background:
    radial-gradient(circle at 8% 55%, rgba(235, 211, 55, 0.96) 0 12px, transparent 13px),
    radial-gradient(circle at 17% 45%, rgba(248, 226, 67, 0.95) 0 17px, transparent 18px),
    radial-gradient(circle at 29% 52%, rgba(226, 205, 40, 0.95) 0 13px, transparent 14px),
    radial-gradient(circle at 42% 40%, rgba(248, 232, 74, 0.96) 0 19px, transparent 20px),
    radial-gradient(circle at 61% 55%, rgba(235, 211, 55, 0.96) 0 15px, transparent 16px),
    radial-gradient(circle at 75% 44%, rgba(248, 226, 67, 0.95) 0 18px, transparent 19px),
    radial-gradient(circle at 88% 58%, rgba(226, 205, 40, 0.95) 0 15px, transparent 16px),
    linear-gradient(90deg, #163523, #607333 34%, #1f2f20 62%, #9d8d21);
  background-size: cover;
}

.official-welcome {
  max-width: 980px;
  margin: 0 auto;
  padding: 70px 34px 46px;
}

.official-welcome h3 {
  margin: 0 0 32px;
  font-size: clamp(1.9rem, 3vw, 3.1rem);
  font-weight: 900;
  text-align: center;
}

.official-welcome p,
.official-welcome li {
  font-size: clamp(1.25rem, 2vw, 2.2rem);
  line-height: 1.45;
}

.official-welcome ul {
  display: grid;
  gap: 16px;
  margin: 22px 0 0;
}

.official-start-action {
  display: grid;
  place-items: center;
  margin: 0 auto 42px;
  width: min(940px, calc(100% - 44px));
  min-height: 170px;
  background: #07557a;
  border-radius: 8px;
}

.official-start-button {
  padding: 26px 56px;
  color: #fff;
  background: transparent;
  border: 4px solid #e5fff6;
  border-radius: 8px;
  font: 900 clamp(1.8rem, 3vw, 3.4rem)/1 Verdana, Geneva, sans-serif;
}

.official-question-top {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  padding: 58px 42px 18px;
}

.official-question-top h3 {
  margin: 8px 0 0;
  font-size: clamp(2rem, 3vw, 3.4rem);
  font-weight: 900;
}

.official-status {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-content: flex-start;
  justify-content: flex-end;
}

.official-status span {
  padding: 10px 14px;
  color: #063f63;
  background: #edf6fb;
  border: 1px solid #c5deec;
  border-radius: 8px;
  font-weight: 900;
}

.official-question {
  padding: 0 42px 28px;
}

.official-question h4 {
  margin: 0 0 36px;
  font-size: clamp(1.65rem, 2.6vw, 2.75rem);
  line-height: 1.28;
}

.official-options {
  display: grid;
  gap: 28px;
  max-width: 940px;
}

.official-option-line {
  display: block;
}

.official-option {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  gap: 18px;
  align-items: center;
  min-height: 64px;
  color: #050915;
  background: #fff;
  border: 2px solid transparent;
  border-radius: 8px;
  text-align: left;
  font-size: clamp(1.25rem, 2vw, 2.35rem);
}

.radio-dot {
  width: 34px;
  height: 34px;
  border: 3px solid #777;
  border-radius: 50%;
}

.official-option.is-selected {
  border-color: #2d68f0;
  background: #f5f8ff;
}

.official-option.is-selected .radio-dot {
  box-shadow: inset 0 0 0 7px #fff;
  background: #2d68f0;
  border-color: #2d68f0;
}

.official-bottom {
  display: grid;
  gap: 22px;
  padding: 24px 42px 34px;
}

.official-nav {
  display: flex;
  flex-wrap: nowrap;
  gap: 10px;
  max-width: 100%;
  margin: 0 -2px;
  padding: 0 2px 14px;
  overflow-x: auto;
  overflow-y: hidden;
  overscroll-behavior-inline: contain;
  scrollbar-gutter: stable;
  scrollbar-color: #1f65ff #e8eef7;
  -webkit-overflow-scrolling: touch;
}

.official-nav button {
  flex: 0 0 clamp(58px, 4.5vw, 72px);
  min-height: 44px;
  color: #111827;
  background: #fff;
  border: 1px solid #cbd3df;
  border-radius: 6px;
  box-shadow: 0 2px 6px rgba(8, 15, 36, 0.15);
  font: 800 1rem/1 Verdana, Geneva, sans-serif;
}

.official-nav::-webkit-scrollbar {
  height: 10px;
}

.official-nav::-webkit-scrollbar-track {
  background: #e8eef7;
  border-radius: 999px;
}

.official-nav::-webkit-scrollbar-thumb {
  background: #1f65ff;
  border-radius: 999px;
}

.official-nav button.is-active {
  border: 3px solid #1f65ff;
}

.official-nav button.is-answered {
  background: #edf6fb;
}

.official-result-body {
  display: grid;
  gap: 20px;
  padding: 56px 42px;
}

.official-result-body h3 {
  margin: 0;
  font-size: clamp(3rem, 6vw, 5.5rem);
  line-height: 1;
}

.official-result.pass .official-result-body h3 {
  color: var(--green);
}

.official-result.fail .official-result-body h3 {
  color: var(--red);
}

.result-metrics {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.result-metrics article {
  display: grid;
  gap: 8px;
  padding: 18px;
  background: #f6f8fb;
  border: 1px solid #dce3ee;
  border-radius: 8px;
}

.result-metrics span,
.result-metrics em {
  color: #526171;
  font-style: normal;
  font-weight: 800;
}

.result-metrics strong {
  color: #080f24;
  font-size: clamp(1.7rem, 3vw, 2.8rem);
}

.mistake-review {
  display: grid;
  gap: 14px;
  padding: 18px;
  background: #fff8f2;
  border: 1px solid #ead2bc;
  border-radius: 8px;
}

.mistake-review.is-clear {
  background: #f3fbf5;
  border-color: #cfe8d6;
}

.mistake-review h4 {
  margin: 0;
  font-size: clamp(1.2rem, 2.2vw, 1.65rem);
}

.mistake-list {
  display: grid;
  gap: 12px;
}

.mistake-item {
  display: grid;
  gap: 8px;
  padding: 14px;
  background: #fff;
  border: 1px solid #e4d7c8;
  border-radius: 8px;
}

.mistake-item.is-value {
  border-left: 5px solid var(--red);
}

.mistake-item p {
  margin: 0;
  color: #526171;
}

.mistake-item strong {
  color: #080f24;
}

.mistake-explanation {
  padding-top: 8px;
  border-top: 1px solid #edf0f4;
}

.history-panel {
  display: grid;
  gap: 10px;
}

.review-advice-panel {
  display: grid;
  gap: 16px;
  padding: clamp(18px, 3vw, 26px);
  color: var(--ink);
  background:
    linear-gradient(135deg, rgba(23, 63, 121, 0.1), transparent 48%),
    rgba(255, 253, 247, 0.96);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 18px 42px rgba(33, 35, 30, 0.1);
}

.review-advice-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(160px, 220px);
  gap: 18px;
  align-items: start;
}

.review-advice-head h3 {
  margin: 0 0 10px;
  font-size: clamp(1.7rem, 3vw, 2.7rem);
}

.review-advice-head p {
  max-width: 860px;
  margin: 0 0 8px;
  color: var(--muted);
}

.review-score-card {
  display: grid;
  gap: 8px;
  padding: 18px;
  color: #fff;
  background: var(--blue);
  border-radius: 8px;
}

.review-score-card span,
.review-score-card em {
  font: 800 0.78rem/1.2 Verdana, Geneva, sans-serif;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.review-score-card strong {
  font-size: clamp(2rem, 5vw, 3.4rem);
  line-height: 1;
}

.review-note {
  margin: 0;
  padding: 12px 14px;
  color: var(--muted);
  background: #f3ead8;
  border-radius: 8px;
}

.review-advice-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.advice-card {
  display: grid;
  gap: 12px;
  padding: 16px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.advice-card-wide {
  grid-column: 1 / -1;
}

.advice-card h4,
.review-history-title h4 {
  margin: 0;
  font-size: 1.2rem;
}

.advice-list {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.advice-list li {
  display: grid;
  gap: 4px;
  padding-bottom: 10px;
  border-bottom: 1px solid #edf0f4;
}

.advice-list li:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.advice-list strong {
  color: var(--blue);
}

.advice-list span,
.advice-list em,
.history-detail {
  color: var(--muted);
}

.advice-list em {
  font-style: normal;
  font-size: 0.92rem;
}

.vocab-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.advice-chip {
  display: inline-grid;
  gap: 4px;
  max-width: 100%;
  padding: 10px 12px;
  background: #eef4f8;
  border: 1px solid rgba(23, 63, 121, 0.16);
  border-radius: 8px;
}

.advice-chip strong {
  color: var(--blue);
}

.advice-chip em {
  color: var(--muted);
  font-style: normal;
}

.review-history-title {
  margin-top: 12px;
}

.review-history-list {
  display: grid;
  gap: 10px;
}

.history-item {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 12px;
  align-items: center;
  padding: 16px;
}

.paywall-card {
  display: grid;
  gap: 14px;
  min-height: 220px;
  padding: clamp(20px, 4vw, 34px);
  color: var(--ink);
  background:
    linear-gradient(135deg, rgba(23, 63, 121, 0.09), transparent 48%),
    var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 12px 30px rgba(33, 35, 30, 0.08);
}

.paywall-card h4 {
  margin: 0;
  max-width: 720px;
  font-size: clamp(1.7rem, 3vw, 2.6rem);
  line-height: 1.04;
}

.paywall-card ul {
  display: grid;
  gap: 7px;
  margin: 0;
  padding-left: 18px;
  color: var(--muted);
}

.modal-backdrop {
  position: fixed;
  inset: 0;
  z-index: 20;
  display: grid;
  place-items: center;
  padding: 20px;
  background: rgba(9, 17, 25, 0.58);
}

.modal-backdrop[hidden] {
  display: none;
}

.auth-modal {
  position: relative;
  width: min(920px, 100%);
  max-height: min(820px, calc(100vh - 40px));
  overflow: auto;
  color: #001a3a;
  background: #f6f7f9;
  border: 1px solid #e1e5eb;
  border-radius: 8px;
  box-shadow: 0 30px 90px rgba(0, 0, 0, 0.32);
}

.auth-modal-inner {
  display: block;
  padding: clamp(34px, 6vw, 70px) clamp(28px, 9vw, 128px) clamp(30px, 6vw, 52px);
}

.auth-offer {
  display: grid;
  align-content: center;
  gap: 16px;
  padding: clamp(24px, 4vw, 42px);
  color: #fffdf7;
  background:
    linear-gradient(135deg, rgba(16, 43, 85, 0.96), rgba(15, 122, 97, 0.9)),
    url("https://upload.wikimedia.org/wikipedia/commons/thumb/b/b9/Flag_of_Australia.svg/1280px-Flag_of_Australia.svg.png");
  background-position: center;
  background-size: cover;
}

.auth-offer h3 {
  font-size: clamp(2rem, 4vw, 3.2rem);
}

.price-stack {
  display: grid;
  gap: 8px;
}

.price-stack strong {
  font-size: 2.3rem;
  line-height: 1;
}

.price-stack span {
  opacity: 0.82;
}

.auth-form {
  display: grid;
  gap: 20px;
  padding: 0;
}

.auth-form-wide h3 {
  margin: 0;
  color: #001a3a;
  font: 900 clamp(2.4rem, 5vw, 3.15rem)/1.04 Verdana, Geneva, sans-serif;
  letter-spacing: 0;
  text-shadow: 2px 2px 0 rgba(46, 99, 230, 0.2);
}

.auth-subtitle {
  margin: 18px 0 0;
  color: #001a3a;
  font: 400 1.35rem/1.35 Verdana, Geneva, sans-serif;
}

.text-link {
  min-height: auto;
  padding: 0;
  color: #0054ff;
  background: transparent;
  font-weight: 800;
}

.modal-head {
  display: flex;
  gap: 12px;
  align-items: start;
  justify-content: space-between;
}

.icon-button {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  color: var(--blue);
  background: #e8edf4;
  border-radius: 50%;
  font: 900 1.1rem/1 Verdana, Geneva, sans-serif;
}

.auth-close {
  position: absolute;
  right: 18px;
  top: 18px;
}

.auth-tabs {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}

.auth-tabs-three {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-bottom: 22px;
}

.auth-tabs button {
  min-height: 40px;
  color: var(--blue);
  background: #e8edf4;
  border-radius: 8px;
  font: 800 0.78rem/1 Verdana, Geneva, sans-serif;
}

.auth-tabs button.is-active {
  color: #fff;
  background: var(--blue);
}

.form-grid {
  display: grid;
  gap: 30px;
}

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

.form-grid label {
  display: grid;
  gap: 12px;
  color: #001a3a;
  font: 800 1.08rem/1.2 Verdana, Geneva, sans-serif;
  letter-spacing: 0;
  text-transform: none;
}

.form-grid input {
  min-height: 62px;
  padding: 0 20px;
  color: #1d2b3e;
  background: #fff;
  border: 1px solid #c9d0da;
  border-radius: 12px;
  outline: none;
  font-size: 1.35rem;
}

.check-row {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  color: #001a3a;
  font: 400 1.02rem/1.45 Verdana, Geneva, sans-serif;
}

.check-row input {
  flex: 0 0 auto;
  width: 28px;
  height: 28px;
  margin-top: 1px;
}

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

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

.social-button {
  min-height: 58px;
  padding: 10px 14px;
  color: #001a3a;
  background: #fff;
  border: 1px solid #c9d0da;
  border-radius: 12px;
  font: 900 0.9rem/1.2 Verdana, Geneva, sans-serif;
}

.social-button span {
  color: #56657a;
  font-weight: 700;
}

.google-button {
  border-color: #d7b247;
}

.facebook-button {
  color: #fff;
  background: #1877f2;
  border-color: #1877f2;
}

.facebook-button span {
  color: rgba(255, 255, 255, 0.84);
}

.divider-label {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 12px;
  align-items: center;
  color: #637083;
  font: 800 0.78rem/1 Verdana, Geneva, sans-serif;
}

.divider-label::before,
.divider-label::after {
  content: "";
  height: 1px;
  background: #d8dde5;
}

.auth-main-button {
  min-height: 68px;
  margin-top: 4px;
  background: #2f66e8;
  border: 1px solid #0b52df;
  border-radius: 10px;
  color: #fff;
  font-size: 1.28rem;
}

.auth-message {
  min-height: 20px;
  color: var(--red);
  font-weight: 700;
}

.auth-message.is-success {
  color: #118267;
}

.auth-reason {
  margin: 12px 0 0;
  padding: 12px 14px;
  color: #102b55;
  background: #eaf0ff;
  border: 1px solid #cdd9ff;
  border-radius: 8px;
  font: 800 0.95rem/1.35 Verdana, Geneva, sans-serif;
}

.billing-note {
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 1.4;
}

.vip-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(240px, 320px);
  gap: 22px;
  align-items: stretch;
  padding: clamp(22px, 4vw, 40px);
  color: #fffdf7;
  background:
    linear-gradient(135deg, rgba(16, 43, 85, 0.96), rgba(17, 130, 103, 0.84)),
    radial-gradient(circle at top right, rgba(245, 209, 118, 0.22), transparent 44%);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.vip-copy h3 {
  max-width: 860px;
  margin-bottom: 18px;
  font-size: clamp(2rem, 4vw, 4rem);
}

.vip-copy p {
  max-width: 860px;
  margin: 0 0 14px;
  color: rgba(255, 253, 247, 0.9);
  font-size: 1.06rem;
  line-height: 1.7;
}

.vip-points {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}

.vip-points span {
  padding: 10px 12px;
  color: #102b55;
  background: #fffdf7;
  border-radius: 8px;
  font: 900 0.9rem/1 Verdana, Geneva, sans-serif;
}

.vip-contact {
  display: grid;
  gap: 12px;
  align-content: start;
  padding: 18px;
  color: var(--ink);
  background: #fffdf7;
  border: 1px solid rgba(255, 255, 255, 0.42);
  border-radius: 8px;
}

.vip-contact img {
  width: 100%;
  aspect-ratio: 1;
  object-fit: contain;
  padding: 8px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.vip-contact strong {
  font-size: 1.18rem;
}

.vip-contact span {
  color: var(--muted);
  line-height: 1.45;
}

.vip-results {
  margin-top: 28px;
}

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

.success-card {
  min-height: 260px;
  margin: 0;
  overflow: hidden;
  background: #fffdf7;
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 12px 30px rgba(16, 43, 85, 0.08);
}

.success-card-large {
  grid-column: span 2;
  grid-row: span 2;
}

.success-card img {
  display: block;
  width: 100%;
  height: 100%;
  min-height: inherit;
  object-fit: cover;
}

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

  .sidebar {
    position: static;
    height: auto;
  }

  .nav-tabs,
  .study-grid,
  .chapter-nav,
  .daily-scenario-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .hero,
  .chapter-lesson,
  .account-form-grid,
  .social-sync-row,
  .sync-options,
  .auth-modal-inner,
  .vip-hero {
    grid-template-columns: 1fr;
  }

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

  .official-nav button {
    flex-basis: 64px;
  }

  .result-metrics {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .main,
  .sidebar {
    padding: 18px;
  }

  .section-head,
  .quiz-top,
  .daily-lesson-head,
  .quiz-actions,
  .history-item,
  .review-advice-head {
    align-items: stretch;
    flex-direction: column;
    grid-template-columns: 1fr;
  }

  .study-note {
    text-align: left;
  }

  .nav-tabs,
  .study-grid,
  .chapter-nav,
  .bilingual-grid,
  .success-grid,
  .daily-scenario-grid,
  .review-advice-grid,
  .auth-tabs-three {
    grid-template-columns: 1fr;
  }

  .success-card-large {
    grid-column: auto;
    grid-row: auto;
  }

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

  .official-brand {
    min-width: auto;
    width: calc(100% - 34px);
  }

  .official-question-top,
  .official-question,
  .official-bottom,
  .official-result-body {
    padding-left: 18px;
    padding-right: 18px;
  }

  .official-question-top {
    flex-direction: column;
  }

  .official-options {
    gap: 16px;
  }

  .official-option {
    grid-template-columns: 34px minmax(0, 1fr);
    font-size: 1.12rem;
  }

  .radio-dot {
    width: 28px;
    height: 28px;
  }

  .official-nav button {
    flex-basis: 58px;
  }
}