:root {
  color-scheme: light;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont,
    "Segoe UI", sans-serif;
  color: #172033;
  background: #f4f7fb;
  font-synthesis: none;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;

  --color-primary: #0056b3;
  --color-primary-hover: #00458f;
  --color-ink: #172033;
  --color-muted: #667085;
  --color-border: #dce3ec;
  --color-surface: #ffffff;
  --color-page: #f4f7fb;
  --color-success: #18794e;
  --color-success-bg: #e8f6ee;
  --color-pending: #946200;
  --color-pending-bg: #fff4d6;
  --shadow-card: 0 12px 32px rgb(20 42 72 / 7%);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  min-width: 320px;
  min-height: 100%;
  scroll-behavior: smooth;
}

body {
  min-width: 320px;
  min-height: 100vh;
  margin: 0;
  background: var(--color-page);
  color: var(--color-ink);
  line-height: 1.5;
}

button,
input,
select,
textarea {
  font: inherit;
}

button {
  cursor: pointer;
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.58;
}

a {
  color: var(--color-primary);
}

:focus-visible {
  outline: 3px solid rgb(0 86 179 / 35%);
  outline-offset: 2px;
}

.app-shell {
  width: min(100% - 32px, 1080px);
  margin-inline: auto;
}

.app-header {
  position: sticky;
  z-index: 10;
  top: 0;
  border-bottom: 1px solid rgb(220 227 236 / 85%);
  background: rgb(255 255 255 / 94%);
  backdrop-filter: blur(12px);
}

.app-header__inner {
  display: flex;
  min-height: 72px;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand {
  display: flex;
  min-width: 0;
  align-items: center;
  gap: 12px;
  color: inherit;
  text-decoration: none;
}

.brand__mark {
  display: grid;
  width: 42px;
  height: 42px;
  flex: 0 0 auto;
  place-items: center;
  border-radius: 13px;
  background: var(--color-primary);
  color: #fff;
  font-size: 0.95rem;
  font-weight: 800;
  letter-spacing: -0.04em;
}

.brand__text {
  overflow: hidden;
  font-size: 1rem;
  font-weight: 750;
  letter-spacing: -0.02em;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.sync-status {
  display: inline-flex;
  min-height: 34px;
  flex: 0 0 auto;
  align-items: center;
  gap: 8px;
  padding: 6px 11px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 700;
  line-height: 1.2;
}

.sync-status::before {
  width: 8px;
  height: 8px;
  flex: 0 0 auto;
  border-radius: 50%;
  background: currentColor;
  content: "";
}

.sync-status--synced,
.sync-status[data-status="synced"] {
  border-color: #c6ead4;
  background: var(--color-success-bg);
  color: var(--color-success);
}

.sync-status--pending,
.sync-status[data-status="pending"] {
  border-color: #f1dfac;
  background: var(--color-pending-bg);
  color: var(--color-pending);
}

.main-content {
  padding-block: clamp(24px, 5vw, 52px) 64px;
}

.page-heading {
  max-width: 720px;
  margin: 0 auto 24px;
  text-align: center;
}

.page-heading h1 {
  margin: 0;
  font-size: clamp(1.7rem, 5vw, 2.5rem);
  letter-spacing: -0.045em;
  line-height: 1.15;
}

.page-heading p {
  margin: 10px 0 0;
  color: var(--color-muted);
  font-size: clamp(0.95rem, 2.5vw, 1.05rem);
}

.card {
  width: min(100%, 760px);
  margin-inline: auto;
  padding: clamp(20px, 4vw, 32px);
  border: 1px solid var(--color-border);
  border-radius: 20px;
  background: var(--color-surface);
  box-shadow: var(--shadow-card);
}

.card + .card {
  margin-top: 20px;
}

.card__header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 24px;
}

.card__title {
  margin: 0;
  font-size: 1.2rem;
  letter-spacing: -0.025em;
}

.card__description {
  margin: 6px 0 0;
  color: var(--color-muted);
  font-size: 0.92rem;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.form-field {
  display: grid;
  min-width: 0;
  gap: 7px;
}

.form-field--full {
  grid-column: 1 / -1;
}

.form-field label,
.field-label {
  color: #344054;
  font-size: 0.88rem;
  font-weight: 700;
}

.form-field input,
.form-field select,
.form-field textarea,
.input,
.select,
.textarea {
  width: 100%;
  min-height: 46px;
  padding: 10px 13px;
  border: 1px solid #cbd5e1;
  border-radius: 10px;
  background: #fff;
  color: var(--color-ink);
  transition: border-color 140ms ease, box-shadow 140ms ease;
}

.form-field textarea,
.textarea {
  min-height: 120px;
  resize: vertical;
}

.form-field input::placeholder,
.form-field textarea::placeholder,
.input::placeholder,
.textarea::placeholder {
  color: #98a2b3;
}

.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus,
.input:focus,
.select:focus,
.textarea:focus {
  border-color: var(--color-primary);
  outline: 0;
  box-shadow: 0 0 0 4px rgb(0 86 179 / 12%);
}

.form-field input[aria-invalid="true"],
.form-field select[aria-invalid="true"],
.form-field textarea[aria-invalid="true"] {
  border-color: #c43232;
}

.field-hint,
.field-error {
  margin: 0;
  font-size: 0.82rem;
}

.field-hint {
  color: var(--color-muted);
}

.field-error {
  color: #b42318;
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-top: 24px;
}

.button {
  display: inline-flex;
  min-height: 46px;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 17px;
  border: 1px solid transparent;
  border-radius: 10px;
  font-size: 0.94rem;
  font-weight: 750;
  line-height: 1.2;
  text-align: center;
  text-decoration: none;
  transition: background-color 140ms ease, border-color 140ms ease,
    color 140ms ease, transform 140ms ease;
}

.button:not(:disabled):active {
  transform: translateY(1px);
}

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

.button--primary:hover:not(:disabled) {
  background: var(--color-primary-hover);
}

.button--secondary {
  border-color: var(--color-border);
  background: #fff;
  color: #344054;
}

.button--secondary:hover:not(:disabled) {
  border-color: #aebdce;
  background: #f8fafc;
}

.button--danger {
  border-color: #f1c7c7;
  background: #fff;
  color: #b42318;
}

.button--danger:hover:not(:disabled) {
  background: #fff5f4;
}

.button--block {
  width: 100%;
}

.progress-track {
  overflow: hidden;
  height: 8px;
  border-radius: 999px;
  background: #e8edf4;
}

.progress-track__value {
  width: var(--progress, 0%);
  height: 100%;
  border-radius: inherit;
  background: var(--color-primary);
  transition: width 180ms ease;
}

.question-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 14px;
  color: var(--color-muted);
  font-size: 0.86rem;
  font-weight: 650;
}

.question-prompt {
  margin: 22px 0;
  font-size: clamp(1.1rem, 3vw, 1.35rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.4;
}

.test-screen[hidden],
.results-screen[hidden] {
  display: none;
}

.test-prompt {
  margin-bottom: 20px;
  padding: 16px 18px;
  border-left: 4px solid var(--color-primary);
  border-radius: 0 12px 12px 0;
  background: #f1f6fd;
}

.test-prompt .field-label,
.test-prompt .question-prompt {
  margin: 0;
}

.test-prompt .question-prompt {
  margin-top: 6px;
}

.audio-button {
  min-height: 42px;
  white-space: nowrap;
}

.workspace-container {
  min-width: 0;
}

.word-simulator {
  overflow: hidden;
  border: 1px solid var(--color-border);
  border-radius: 14px;
  background: #f8fafc;
}

.office-ribbon {
  border-bottom: 1px solid var(--color-border);
  background: #fff;
}

.office-ribbon__tabs {
  display: flex;
  overflow-x: auto;
  gap: 4px;
  padding: 8px 12px 0;
  scrollbar-width: thin;
}

.office-ribbon__tab {
  min-height: 38px;
  flex: 0 0 auto;
  padding: 7px 14px;
  border: 0;
  border-bottom: 3px solid transparent;
  background: transparent;
  color: #526176;
  font-size: 0.86rem;
  font-weight: 700;
}

.office-ribbon__tab.is-active {
  border-bottom-color: var(--color-primary);
  color: var(--color-primary);
}

.office-ribbon__toolbar {
  display: flex;
  overflow-x: auto;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  scrollbar-width: thin;
  -webkit-overflow-scrolling: touch;
}

.office-ribbon__group {
  display: flex;
  flex: 0 0 auto;
  gap: 5px;
  padding-right: 12px;
  border-right: 1px solid var(--color-border);
}

.office-tool {
  display: grid;
  width: 42px;
  height: 42px;
  flex: 0 0 auto;
  place-items: center;
  border: 1px solid transparent;
  border-radius: 8px;
  background: transparent;
  color: #344054;
  font-size: 1.05rem;
}

.office-tool:hover {
  border-color: #c9d9ec;
  background: #f1f6fd;
}

.office-tool:active {
  background: #e4effb;
}

.office-ribbon__font-size {
  flex: 0 0 auto;
}

.office-ribbon__font-size select {
  min-height: 42px;
  max-width: 140px;
  padding: 7px 28px 7px 10px;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  background: #fff;
  color: var(--color-ink);
}

.office-doc-page {
  width: min(100% - 24px, 720px);
  min-height: 380px;
  margin: 16px auto;
  padding: clamp(20px, 5vw, 48px);
  border: 1px solid #e1e7ef;
  background: #fff;
  box-shadow: 0 4px 16px rgb(20 42 72 / 6%);
  color: #1d2939;
  line-height: 1.65;
  overflow-wrap: anywhere;
}

.office-doc-page:focus {
  outline: 2px solid rgb(0 86 179 / 28%);
  outline-offset: 2px;
}

.office-doc-page h1:first-child {
  margin-top: 0;
}

.visually-hidden {
  position: absolute;
  overflow: hidden;
  width: 1px;
  height: 1px;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  clip-path: inset(50%);
}

.result-status {
  margin: 7px 0 0;
  font-size: 0.95rem;
  font-weight: 750;
}

.result-status--passed {
  color: var(--color-success);
}

.result-status--practice {
  color: var(--color-pending);
}

.final-score {
  color: var(--color-primary);
  font-size: clamp(1.8rem, 6vw, 2.6rem);
  letter-spacing: -0.05em;
}

.results-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.results-group {
  padding: 16px;
  border: 1px solid var(--color-border);
  border-radius: 12px;
  background: #fbfcfe;
}

.results-group h3 {
  margin: 0 0 10px;
  font-size: 0.98rem;
}

.results-group ul {
  display: grid;
  gap: 7px;
  margin: 0;
  padding-left: 20px;
  color: #475467;
  font-size: 0.9rem;
}

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

.choice {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 14px 15px;
  border: 1px solid var(--color-border);
  border-radius: 12px;
  background: #fff;
  cursor: pointer;
  transition: border-color 140ms ease, background-color 140ms ease;
}

.choice:hover {
  border-color: #9bb8da;
  background: #f8fbff;
}

.choice input {
  width: 18px;
  height: 18px;
  flex: 0 0 auto;
  margin: 2px 0 0;
  accent-color: var(--color-primary);
}

.choice__text {
  color: #344054;
  line-height: 1.45;
}

.empty-state {
  padding: 36px 20px;
  color: var(--color-muted);
  text-align: center;
}

.attempt-list {
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.attempt-item {
  padding: 16px;
  border: 1px solid var(--color-border);
  border-radius: 12px;
  background: #fff;
}

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

.attempt-item__score {
  flex: 0 0 auto;
  color: var(--color-success);
  font-size: 0.86rem;
  font-weight: 750;
}

.attempt-item__details,
.attempt-item__sync {
  margin: 7px 0 0;
  color: var(--color-muted);
  font-size: 0.84rem;
}

.attempt-item__sync--pending {
  color: var(--color-pending);
}

.attempt-item__sync--synced {
  color: var(--color-success);
}

.app-footer {
  padding: 20px 0 32px;
  color: var(--color-muted);
  font-size: 0.82rem;
  text-align: center;
}

@media (max-width: 640px) {
  .app-shell {
    width: min(100% - 24px, 1080px);
  }

  .app-header__inner {
    min-height: 64px;
    gap: 10px;
  }

  .brand__mark {
    width: 38px;
    height: 38px;
    border-radius: 11px;
  }

  .brand__text {
    font-size: 0.9rem;
  }

  .sync-status {
    min-height: 31px;
    gap: 6px;
    padding: 5px 9px;
    font-size: 0.74rem;
  }

  .main-content {
    padding-top: 28px;
  }

  .card {
    border-radius: 16px;
  }

  .form-grid {
    grid-template-columns: 1fr;
    gap: 15px;
  }

  .form-field--full {
    grid-column: auto;
  }

  .button-row {
    gap: 10px;
  }

  .button-row .button {
    flex: 1 1 150px;
  }

  .attempt-item__heading {
    flex-direction: column;
    gap: 4px;
  }

  .card__header:has(.audio-button) {
    flex-direction: column;
  }

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

  .office-doc-page {
    min-height: 320px;
    margin: 12px;
    width: calc(100% - 24px);
  }
}

@media (max-width: 380px) {
  .brand {
    gap: 8px;
  }

  .brand__text {
    max-width: 125px;
  }

  .sync-status {
    font-size: 0.69rem;
  }
}

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