:root {
  --tabbar-height: 74px;
}

button,
a,
input,
select {
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
}

.mobile-tabbar,
.standalone-heading {
  display: none;
}

.shell-loading,
.shell-error {
  min-height: 100dvh;
  display: grid;
  place-items: center;
  padding: 24px;
  color: var(--muted);
  background: var(--bg);
}

.shell-error {
  align-content: center;
  gap: 12px;
}

.shell-error a {
  color: var(--primary);
}

.desktop-nav a[aria-current="page"] {
  color: var(--text);
  background: var(--surface);
  box-shadow: 0 2px 8px rgba(25, 35, 65, .06);
}

.standalone-page main {
  min-height: calc(100dvh - 130px);
}

.standalone-page .standalone-heading {
  width: min(1120px, calc(100% - 36px));
  display: flex;
  align-items: end;
  justify-content: space-between;
  margin: 0 auto;
  padding: 42px 0 0;
}

.standalone-heading h1 {
  margin: 5px 0 0;
  font-size: clamp(32px, 4vw, 45px);
  letter-spacing: -.045em;
}

.standalone-heading p {
  margin: 5px 0 0;
  color: var(--muted);
  font-size: 14px;
}

.standalone-page main > .section {
  padding-top: 30px;
}

.standalone-page main > .section[hidden] {
  display: none;
}

.standalone-page .section > .section-heading-row {
  display: none;
}

.view-library #mistakes {
  padding-top: 56px;
}

.view-library #mistakes > .section-heading-row {
  display: flex;
}

.view-stats .hero-card,
.view-stats .today-plan {
  display: none;
}

.view-stats .dashboard {
  padding-top: 28px;
}

.view-stats .stats-grid {
  margin-top: 0;
}

.view-stats .today-grid {
  grid-template-columns: 1fr;
  margin-top: 18px;
}

.view-stats .progress-panel {
  min-height: 390px;
}

.view-stats .week-chart {
  min-height: 230px;
}

.view-settings .data-grid .data-card:nth-child(3) {
  display: none;
}

.view-settings .data-grid {
  grid-template-columns: repeat(3, 1fr);
}

.view-settings .voice-settings-panel {
  margin-top: 0;
}

.cloud-sync-panel {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 18px;
  margin-bottom: 14px;
  padding: 20px 22px;
}

.cloud-icon {
  color: var(--green);
  background: color-mix(in srgb, var(--green) 10%, var(--surface));
}

.cloud-sync-copy h3,
.cloud-sync-copy p {
  margin: 0;
}

.cloud-sync-copy p {
  margin-top: 3px;
  color: var(--muted);
  font-size: 13px;
}

.cloud-sync-title-row,
.cloud-code-row,
.cloud-sync-actions {
  display: flex;
  align-items: center;
  gap: 9px;
}

.cloud-sync-state {
  padding: 3px 8px;
  border-radius: 999px;
  color: var(--muted);
  background: var(--soft);
  font-size: 11px;
  font-weight: 800;
}

.cloud-sync-state[data-state="synced"] {
  color: var(--green);
  background: color-mix(in srgb, var(--green) 10%, var(--surface));
}

.cloud-sync-state[data-state="syncing"],
.cloud-sync-state[data-state="pending"] {
  color: var(--primary);
  background: color-mix(in srgb, var(--primary) 10%, var(--surface));
}

.cloud-sync-state[data-state="offline"] {
  color: var(--orange);
  background: color-mix(in srgb, var(--orange) 11%, var(--surface));
}

.cloud-code-row {
  margin-top: 10px;
  color: var(--muted);
  font-size: 11px;
}

.cloud-code-row code {
  padding: 4px 8px;
  border: 1px solid var(--line);
  border-radius: 7px;
  color: var(--text);
  background: var(--soft);
  font-size: 11px;
}

.cloud-code-row small {
  margin-left: auto;
}

.cloud-sync-actions {
  justify-content: flex-end;
  flex-wrap: wrap;
  max-width: 310px;
}

.cloud-sync-actions .text-button {
  padding: 5px 7px;
  font-size: 11px;
}

@media (max-width: 800px) {
  body {
    padding-bottom: calc(var(--tabbar-height) + env(safe-area-inset-bottom));
  }

  .topbar {
    position: sticky;
    min-height: 58px;
    padding: 8px 14px;
  }

  .brand-mark {
    width: 36px;
    height: 36px;
    border-radius: 11px;
    font-size: 12px;
  }

  .brand strong {
    font-size: 13px;
  }

  .header-actions .icon-button {
    width: 36px;
    height: 36px;
  }

  .mobile-add {
    right: 16px;
    bottom: calc(var(--tabbar-height) + env(safe-area-inset-bottom) + 14px);
    width: 48px;
    height: 48px;
    border-radius: 15px;
    font-size: 22px;
  }

  .standalone-page:not(.view-library) .mobile-add {
    display: none;
  }

  .view-library .mobile-add {
    display: none;
  }

  .view-library .desktop-add {
    width: 36px;
    min-height: 36px;
    display: grid;
    padding: 0;
    font-size: 0;
  }

  .view-library .desktop-add::before {
    content: "+";
    font-size: 21px;
  }

  .mobile-tabbar {
    position: fixed;
    z-index: 50;
    right: 0;
    bottom: 0;
    left: 0;
    height: calc(var(--tabbar-height) + env(safe-area-inset-bottom));
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    padding: 7px 8px env(safe-area-inset-bottom);
    border-top: 1px solid color-mix(in srgb, var(--line) 84%, transparent);
    background: color-mix(in srgb, var(--surface) 94%, transparent);
    box-shadow: 0 -10px 28px rgba(13, 20, 40, .06);
    backdrop-filter: blur(20px) saturate(1.15);
  }

  .tab-item {
    min-width: 0;
    display: grid;
    place-content: center;
    justify-items: center;
    gap: 2px;
    border-radius: 12px;
    color: var(--muted);
    font-size: 11px;
    font-weight: 700;
  }

  .tab-item[aria-current="page"] {
    color: var(--primary);
  }

  .tab-icon {
    height: 28px;
    display: grid;
    place-items: center;
    font-size: 25px;
    font-weight: 400;
    line-height: 1;
  }

  .tab-library .tab-icon {
    font-size: 22px;
  }

  .tab-stats .tab-icon {
    font-size: 30px;
    transform: rotate(-8deg);
  }

  .tab-settings .tab-icon {
    font-size: 32px;
    font-weight: 300;
  }

  footer {
    display: none;
  }

  .standalone-page .standalone-heading {
    width: min(100% - 28px, 1120px);
    display: block;
    padding-top: 28px;
  }

  .standalone-heading h1 {
    font-size: 30px;
  }

  .standalone-heading p {
    font-size: 13px;
  }

  .standalone-page main > .section {
    width: min(100% - 28px, 1120px);
    padding-top: 22px;
  }

  .standalone-page .section > .section-heading-row {
    display: none;
  }

  /* The practice launcher is a compact, app-like menu. */
  .view-practice .mode-grid {
    gap: 10px;
  }

  .view-practice .mode-card {
    min-height: 0;
    display: grid;
    grid-template-columns: 72px 1fr auto;
    grid-template-rows: auto auto;
    align-items: center;
    gap: 2px 14px;
    padding: 17px;
    text-align: left;
    border-radius: 16px;
  }

  .view-practice .mode-icon {
    grid-row: 1 / 3;
    width: 72px;
    min-height: 52px;
    display: grid;
    place-items: center;
    margin: 0;
  }

  .view-practice .mode-card h3 {
    margin: 0;
    font-size: 17px;
  }

  .view-practice .mode-card p {
    margin: 2px 0 0;
    overflow: hidden;
    color: var(--muted);
    font-size: 12px;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .view-practice .mode-card > span:last-child {
    grid-column: 3;
    grid-row: 1 / 3;
    font-size: 0;
  }

  .view-practice .mode-card > span:last-child::after {
    content: "›";
    font-size: 27px;
  }

  /* Library cards become a concise mobile reading list. */
  .view-library .library-toolbar {
    display: block;
    gap: 8px;
    padding: 8px;
  }

  .view-library .search-box {
    min-height: 48px;
  }

  .view-library .library-toolbar select {
    display: none;
  }

  .view-library .library-meta {
    margin-top: 10px;
  }

  .view-library .category-row {
    flex-wrap: nowrap;
    overflow-x: auto;
    padding-bottom: 3px;
    scrollbar-width: none;
  }

  .view-library .category-row::-webkit-scrollbar {
    display: none;
  }

  .view-library .category-row button {
    flex: 0 0 auto;
    white-space: nowrap;
  }

  .view-library .lesson-grid,
  .view-library .mistake-grid {
    gap: 10px;
  }

  .view-library .lesson-card {
    min-height: 0;
    padding: 15px;
    border-radius: 15px;
  }

  .view-library .lesson-english {
    margin: 14px 0 4px;
    font-size: 20px;
  }

  .view-library .lesson-chinese {
    font-size: 13px;
  }

  .view-library .lesson-note,
  .view-library .reason-line {
    display: none;
  }

  .view-library .correction-box {
    margin-top: 10px;
  }

  .view-library .lesson-footer {
    padding-top: 13px;
  }

  .view-library #mistakes {
    padding-top: 44px;
  }

  .view-library #mistakes > .section-heading-row {
    display: block;
  }

  .view-library #mistakes .section-heading-row p,
  .view-library #mistakes .section-kicker {
    display: none;
  }

  .view-library #mistakes .section-heading-row h2 {
    font-size: 24px;
  }

  /* Stats prioritize three numbers and one readable chart. */
  .view-stats .dashboard {
    padding-top: 22px;
  }

  .view-stats .stats-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
  }

  .view-stats .stat-card {
    min-height: 94px;
    display: grid;
    justify-items: start;
    gap: 8px;
    padding: 13px;
  }

  .view-stats .stat-card:last-child {
    display: none;
  }

  .view-stats .stat-icon {
    width: 32px;
    height: 32px;
    border-radius: 10px;
  }

  .view-stats .stat-card strong {
    font-size: 22px;
  }

  .view-stats .stat-card span {
    font-size: 11px;
  }

  .view-stats .today-grid {
    display: block;
    margin-top: 10px;
  }

  .view-stats .progress-panel {
    min-height: 360px;
    padding: 18px 15px;
  }

  .view-stats .week-chart {
    min-height: 230px;
  }

  /* Settings is a short list, not a collection of marketing cards. */
  .view-settings .voice-settings-panel {
    display: grid;
    grid-template-columns: 44px 1fr;
    gap: 15px;
    padding: 17px;
  }

  .view-settings .cloud-sync-panel {
    display: grid;
    grid-template-columns: 1fr;
    gap: 12px;
    padding: 17px;
  }

  .view-settings .cloud-sync-panel > .data-icon {
    display: none;
  }

  .view-settings .cloud-sync-copy p {
    display: none;
  }

  .view-settings .cloud-code-row {
    display: grid;
    grid-template-columns: auto 1fr;
  }

  .view-settings .cloud-code-row small {
    grid-column: 1 / -1;
    margin: 0;
  }

  .view-settings .cloud-sync-actions {
    display: grid;
    grid-template-columns: 1fr 1fr;
    max-width: none;
  }

  .view-settings .cloud-sync-actions .text-button {
    grid-column: 1 / -1;
  }

  .view-settings .voice-settings-copy {
    grid-column: 1 / -1;
  }

  .view-settings .voice-settings-copy p,
  .view-settings .data-card p {
    display: none;
  }

  .view-settings .voice-setting,
  .view-settings #voicePreview {
    grid-column: 1 / -1;
  }

  .view-settings .data-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 10px;
    margin-top: 10px;
  }

  .view-settings .data-card {
    min-height: 0;
    display: grid;
    grid-template-columns: 44px 1fr auto;
    align-items: center;
    gap: 12px;
    padding: 16px;
  }

  .view-settings .data-card h3 {
    margin: 0;
    font-size: 16px;
  }

  .view-settings .data-card .button {
    margin: 0;
  }

  .view-settings .data-icon {
    width: 42px;
    height: 42px;
  }

  /* Practice becomes a true full-screen task on phones. */
  .practice-dialog[open] {
    inset: 0;
    width: 100%;
    max-width: none;
    height: 100dvh;
    max-height: none;
    display: flex;
    flex-direction: column;
    margin: 0;
    overflow: hidden;
    border: 0;
    border-radius: 0;
  }

  .practice-dialog::backdrop {
    background: var(--bg);
    backdrop-filter: none;
  }

  .practice-header {
    position: relative;
    min-height: 64px;
    flex: 0 0 auto;
    padding: max(12px, env(safe-area-inset-top)) 16px 10px;
    border-bottom: 0;
  }

  .practice-header > div {
    flex: 1;
    text-align: center;
  }

  .practice-header .section-kicker {
    display: none;
  }

  .practice-header h2 {
    margin: 0;
    font-size: 16px;
  }

  .practice-header #closePractice {
    position: absolute;
    left: 12px;
    width: 40px;
    height: 40px;
    border: 0;
    background: transparent;
    font-size: 24px;
  }

  .practice-dialog:focus {
    outline: 0;
  }

  .practice-progress {
    flex: 0 0 auto;
    padding: 5px 18px 0;
  }

  .practice-progress > div:first-child {
    justify-content: center;
    font-size: 12px;
  }

  #practiceCategory {
    display: none;
  }

  .progress-track {
    height: 3px;
    margin-top: 10px;
  }

  .practice-body {
    min-height: 0;
    flex: 1 1 auto;
    align-content: center;
    overflow-y: auto;
    padding: 28px 22px;
    text-align: center;
  }

  .practice-body.practice-body-dictation {
    display: grid;
    align-content: center;
    padding: 28px 22px;
  }

  .practice-dialog:has(.rating-area:not(.hidden)) .practice-body {
    align-content: start;
  }

  .prompt-label {
    font-size: 11px;
    letter-spacing: .08em;
  }

  .practice-prompt {
    margin: 14px auto;
    font-size: clamp(28px, 8.7vw, 38px);
    line-height: 1.34;
  }

  .practice-subtitle,
  .relearn-note {
    display: none;
  }

  .recording-panel {
    width: min(100%, 520px);
    gap: 14px;
    margin: 28px auto 0;
    padding: 0;
    border: 0;
    background: transparent;
  }

  .recording-status-row {
    justify-content: center;
  }

  .recording-status-row small,
  .recording-note {
    display: none;
  }

  .recording-controls {
    grid-template-columns: 1fr 1fr;
    gap: 9px;
  }

  .recording-controls .recording-primary {
    grid-column: 1 / -1;
    min-height: 52px;
  }

  .recording-controls .button:not(.recording-primary) {
    min-height: 46px;
  }

  .recording-result {
    text-align: left;
  }

  .practice-actions {
    justify-content: center;
    margin-top: 18px;
  }

  .practice-actions .button {
    min-height: 46px;
  }

  .dictation-practice {
    width: min(100%, 520px);
    margin: auto;
  }

  .dictation-audio-card {
    display: grid;
    grid-template-columns: 1fr;
    justify-items: center;
    gap: 14px;
    padding: 0;
    border: 0;
    background: transparent;
  }

  .dictation-headphones,
  .dictation-audio-copy {
    display: none;
  }

  .dictation-audio-card .button {
    grid-column: auto;
    width: 112px;
    height: 112px;
    padding: 0 16px;
    border-radius: 50%;
    font-size: 0;
  }

  .dictation-audio-card .button::before {
    content: "▶";
    margin-left: 5px;
    font-size: 30px;
  }

  .dictation-input {
    min-height: 52px;
    margin-top: 24px;
    text-align: left;
  }

  .dictation-actions {
    grid-template-columns: 1fr 1fr;
  }

  .practice-answer {
    text-align: left;
  }

  .practice-answer .answer-reason {
    display: none;
  }

  .rating-area {
    position: relative;
    flex: 0 0 auto;
    padding: 12px 16px calc(16px + env(safe-area-inset-bottom));
    border-top: 1px solid var(--line);
  }

  .rating-area > p {
    margin: 0 0 8px;
    text-align: center;
  }

  .rating-buttons.learning-ratings {
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
  }

  .learning-ratings button {
    min-height: 50px;
    border-radius: 12px;
  }

  .learning-ratings button small {
    display: none;
  }

  .word-dialog,
  .record-dialog {
    width: calc(100% - 20px);
    max-height: calc(100dvh - 20px);
    margin: auto;
    border-radius: 18px;
  }
}

@media (max-width: 390px) {
  .view-practice .mode-card {
    grid-template-columns: 62px 1fr auto;
    gap: 2px 11px;
    padding: 14px;
  }

  .view-practice .mode-icon {
    width: 62px;
  }

  .view-stats .stats-grid {
    grid-template-columns: 1fr 1fr;
  }

  .view-stats .stat-card:nth-child(3) {
    grid-column: 1 / -1;
  }
}