:root {
  color-scheme: light;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: #29332f;
  background: #f8f8f5;
  font-synthesis: none;
  --color-bg: #f8f8f5;
  --color-surface: #fdfcf8;
  --color-surface-soft: #f1f4ee;
  --color-text: #29332f;
  --color-text-secondary: #52625a;
  --color-text-muted: #68766f;
  --color-border: #d7ded7;
  --color-border-soft: #e7ece6;
  --color-primary: #258548;
  --color-primary-hover: #1d713c;
  --color-primary-soft: #c3efcf;
  --color-primary-border: #70c58a;
  --color-primary-text: #176b36;
  --color-primary-focus: rgb(37 133 72 / 28%);
  --color-success: #238552;
  --color-success-soft: #cff1dc;
  --color-success-text: #1b6942;
  --color-danger: #d72d4b;
  --color-danger-hover: #bd233d;
  --color-danger-soft: #ffc4d0;
  --color-danger-answer-soft: #fff0f3;
  --color-danger-border: #ef8295;
  --color-danger-text: #b51f3b;
  --color-danger-focus: rgb(215 45 75 / 28%);
  --color-warning: #96703a;
  --color-warning-soft: #f6eddc;
  --color-warning-text: #79572b;
  --color-overlay: rgb(41 51 47 / 58%);
  --color-shadow: rgb(41 51 47 / 7%);
  --color-shadow-strong: rgb(41 51 47 / 18%);
  --theme-light: var(--color-primary-soft);
  --theme-dark: var(--color-primary);
  --theme-soft: var(--color-primary-soft);
  --theme-border: var(--color-primary-border);
  --theme-focus: var(--color-primary-focus);
  --theme-dark-hover: var(--color-primary-hover);
  --green: var(--color-primary);
  --green-dark: var(--color-primary-text);
  --green-soft: var(--color-primary-soft);
  --success: var(--color-success);
  --success-dark: var(--color-success-text);
  --success-soft: var(--color-success-soft);
  --red: var(--color-danger);
  --red-dark: var(--color-danger-text);
  --red-soft: var(--color-danger-soft);
  --ink: var(--color-text);
  --muted: var(--color-text-muted);
  --line: var(--color-border);
  --panel: var(--color-surface);
  --shadow: 0 8px 24px var(--color-shadow);
}

* { box-sizing: border-box; }
html { min-width: 0; scroll-behavior: smooth; }
body { margin: 0; min-width: 0; overflow-x: hidden; background: var(--color-bg); }
body.modal-open { overflow: hidden; }
body.vocabulary-card-open { overflow: hidden; }
body.account-dialog-open,
body.cloud-learning-setup-open,
body.custom-vocabulary-setup-open { overflow: hidden; }
button, select, input { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
[hidden] { display: none !important; }
h1, h2, p { margin-top: 0; }

.topbar {
  border-bottom: 1px solid var(--color-border-soft);
  background: rgb(253 252 248 / 96%);
}
.topbar-inner {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  width: min(1380px, calc(100% - 48px));
  min-height: 78px;
  margin: 0 auto;
  gap: 28px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  min-width: 0;
  color: var(--ink);
  text-decoration: none;
  white-space: nowrap;
  font-size: clamp(20px, 2vw, 28px);
  font-weight: 800;
  letter-spacing: -0.03em;
}
.brand-mark {
  display: inline-grid;
  width: 34px;
  height: 34px;
  flex: 0 0 34px;
  place-items: center;
  border-radius: 10px;
  background: var(--color-primary);
  color: var(--color-surface);
  font-size: 21px;
  font-weight: 900;
}
.primary-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 0;
  gap: 8px;
}
.nav-link, .mode-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 8px 14px;
  border: 1px solid transparent;
  border-radius: 8px;
  background: transparent;
  color: var(--color-text-secondary);
  cursor: pointer;
  text-decoration: none;
  white-space: nowrap;
  font-weight: 700;
}
.nav-link:hover:not(:disabled), .nav-link-current {
  border-color: var(--color-primary-border);
  background: var(--color-primary-soft);
  color: var(--color-primary-text);
}
.nav-link:disabled { cursor: not-allowed; opacity: 0.42; }
.account-nav { font-weight: 750; }
.mode-switch {
  display: flex;
  gap: 6px;
  padding: 4px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--color-surface);
}
.mode-button { min-height: 38px; padding: 6px 13px; border: 0; border-radius: 7px; }
.mode-button[aria-pressed="true"] { background: var(--color-primary-soft); color: var(--color-primary-text); }
.mode-button:disabled { cursor: not-allowed; opacity: 0.55; }

.practice-shell {
  width: min(1380px, calc(100% - 48px));
  margin: 0 auto;
  padding: 20px 0 52px;
}
.stats-panel {
  margin-bottom: 16px;
  padding: 10px 8px;
  border: 1px solid var(--color-border-soft);
  border-radius: 13px;
  background: var(--panel);
  box-shadow: 0 4px 16px var(--color-shadow);
}
.stat-block {
  display: flex;
  min-width: 0;
  min-height: 78px;
  padding: 8px 28px;
  flex-direction: column;
  justify-content: center;
}
.stat-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 11px;
  font-weight: 700;
}
.stat-progress-count { color: var(--color-primary-text); font-size: 17px; font-weight: 800; white-space: nowrap; }
.progress-track {
  height: 9px;
  overflow: hidden;
  border-radius: 999px;
  background: var(--color-surface-soft);
}
.progress-value {
  display: block;
  width: 0;
  height: 100%;
  border-radius: inherit;
  background: var(--color-primary);
  transition: width 180ms ease;
}

.workspace-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 330px;
  align-items: start;
  gap: 18px;
}
.workspace-primary { display: flex; min-width: 0; flex-direction: column; }
.round-panel, .practice-card, .sidebar-card {
  border: 1px solid var(--color-border-soft);
  border-radius: 13px;
  background: var(--panel);
  box-shadow: var(--shadow);
}
.round-panel {
  display: flex;
  align-items: center;
  min-height: 76px;
  margin-bottom: 16px;
  padding: 13px 18px;
  gap: 18px;
}
.round-panel-title { flex: 0 0 auto; padding-right: 18px; border-right: 1px solid var(--color-border-soft); }
.round-panel-title strong { display: block; font-size: 18px; }
.section-kicker {
  display: block;
  margin-bottom: 3px;
  color: var(--color-primary-text);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.round-setup, .round-active {
  display: flex;
  align-items: center;
  min-width: 0;
  flex: 1;
  gap: 10px;
}
.round-setup label { color: var(--color-text-secondary); font-size: 14px; font-weight: 700; white-space: nowrap; }
.round-setup select, .round-setup input {
  min-height: 40px;
  min-width: 0;
  padding: 7px 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--color-surface);
  color: var(--ink);
}
.round-setup input { width: 104px; }
.round-active { justify-content: space-between; }
.round-active strong { overflow-wrap: anywhere; }
.round-panel[data-active-round="true"] {
  order: 2;
  width: 100%;
  min-height: 0;
  justify-content: stretch;
  margin: 16px 0 0;
  padding: 0;
  border: 0;
  background: transparent;
  box-shadow: none;
}
.round-panel[data-active-round="true"] .round-panel-title,
.round-panel[data-active-round="true"] #round-progress { display: none; }
.round-panel[data-active-round="true"] .round-active { width: 100%; flex: 1 1 auto; }
.round-panel[data-active-round="true"] #abandon-round {
  width: 100%;
  min-height: 48px;
  padding: 10px 18px;
  border-color: var(--color-danger-border);
  background: var(--color-surface);
  color: var(--color-danger-text);
  font-size: 14px;
  text-align: center;
}
.round-panel[data-active-round="true"] #abandon-round:hover:not(:disabled) {
  border-color: var(--color-danger);
  background: var(--color-danger-soft);
}
.round-summary { margin: 0 0 0 auto; color: var(--color-primary-text); font-size: 13px; font-weight: 700; }

.completion-modal {
  position: fixed;
  z-index: 1000;
  inset: 0;
  display: grid;
  padding: 24px;
  place-items: center;
  overflow-y: auto;
  background: var(--color-overlay);
  backdrop-filter: blur(2px);
}
.completion-card {
  width: min(100%, 520px);
  padding: 30px;
  border: 1px solid var(--color-primary-border);
  border-radius: 16px;
  background: var(--color-surface);
  box-shadow: 0 20px 52px var(--color-shadow-strong);
  text-align: center;
  animation: completion-arrive 260ms ease-out both;
}
.completion-icon { margin-bottom: 10px; font-size: 46px; line-height: 1; }
.completion-card h2 { margin: 4px 0 12px; font-size: 26px; }
.completion-message { margin: 0 0 24px; color: var(--muted); font-size: 16px; }
.completion-message strong { color: var(--color-primary-text); font-size: 21px; }
.completion-actions { display: flex; justify-content: center; gap: 10px; }
.abandon-confirm-card { width: min(100%, 440px); }
.abandon-confirm-card h2 { margin-top: 0; }

.account-card {
  width: min(100%, 430px);
  padding: 24px;
  text-align: left;
}
.account-dialog-header {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 40px;
  padding-right: 44px;
  margin-bottom: 20px;
}
.account-dialog-header h2 { margin: 0; white-space: nowrap; }
.account-dialog-close {
  position: absolute;
  top: 0;
  right: 0;
  width: 40px;
  min-width: 40px;
  height: 40px;
  padding: 0;
  border: 0;
  border-radius: 50%;
  background: transparent;
  color: var(--color-text-secondary);
  cursor: pointer;
  font-size: 25px;
  font-weight: 500;
  line-height: 1;
}
.account-dialog-close:hover { background: var(--color-surface-soft); color: var(--color-text); }
.account-dialog-close:focus-visible {
  outline: 3px solid var(--color-primary-focus);
  outline-offset: 1px;
}
.account-form { display: grid; gap: 9px; }
.account-form label { color: var(--color-text-secondary); font-size: 14px; font-weight: 750; }
.account-field-row { display: grid; gap: 9px; }
.account-form input {
  width: 100%;
  min-height: 46px;
  margin-bottom: 7px;
  padding: 10px 12px;
  border: 1px solid var(--color-border);
  border-radius: 9px;
  background: var(--color-surface);
  color: var(--color-text);
}
.account-form input:focus {
  border-color: var(--color-primary-border);
  outline: 3px solid var(--color-primary-focus);
}
.account-confirm-row { display: grid; gap: 9px; }
.account-local-note {
  margin: 4px 0 0;
  color: var(--color-text-muted);
  font-size: 13px;
  line-height: 1.55;
  text-align: center;
}
.account-feedback {
  min-height: 21px;
  margin: 14px 0 4px;
  color: var(--color-danger-text);
  font-size: 14px;
  line-height: 1.5;
  text-align: center;
}
.account-mode-toggle {
  display: block;
  min-height: 40px;
  margin: 0 auto;
  padding: 7px 10px;
  border: 0;
  background: transparent;
  color: var(--color-primary-text);
  cursor: pointer;
  font-weight: 750;
}
.account-panel { text-align: center; }
.account-panel > p:first-child { margin-bottom: 8px; color: var(--color-text-secondary); }
.account-email-display {
  display: block;
  margin-bottom: 16px;
  overflow-wrap: anywhere;
  color: var(--color-text);
  font-size: 17px;
}
.account-panel .account-local-note { margin-bottom: 18px; }
.account-panel #account-cloud-setup-open,
.account-panel #account-cloud-reload { margin-bottom: 10px; }
.account-confirmation-state { text-align: center; }
.account-confirmation-state > p:first-child {
  margin: 2px 0 8px;
  color: var(--color-text-secondary);
}
.account-confirmation-state .account-email-display { margin-bottom: 12px; }
.account-confirmation-state .account-local-note { margin-bottom: 20px; }
.account-confirmation-state #account-pending-resend { margin-bottom: 9px; }
.account-confirmation-message {
  margin: 4px 0 20px;
  color: var(--color-text-secondary);
  line-height: 1.65;
}
.account-confirmation-actions { display: grid; gap: 9px; }
.cloud-learning-setup-card { width: min(100%, 480px); }
.cloud-learning-setup-copy {
  margin: 0 0 18px;
  color: var(--color-text-secondary);
  line-height: 1.7;
}
.cloud-learning-setup-actions {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin-bottom: 14px;
}
.cloud-learning-setup-card .account-local-note { margin: 0; }

@keyframes completion-arrive {
  from { opacity: 0; transform: translateY(-8px); }
  to { opacity: 1; transform: translateY(0); }
}

@media (prefers-reduced-motion: reduce) {
  .completion-card { animation: none; }
}

.practice-card { padding: 30px clamp(24px, 5vw, 62px) 30px; }
.question-meta { text-align: center; }
.question-type { color: var(--color-primary-text); font-weight: 700; }
.word {
  max-width: 100%;
  margin: 6px 0 9px;
  text-align: center;
  overflow-wrap: anywhere;
  font-size: clamp(44px, 6vw, 68px);
  line-height: 1.08;
  letter-spacing: -0.035em;
}
.prompt { margin-bottom: 26px; color: var(--muted); text-align: center; font-size: 17px; }
.prompt.prompt-multiple {
  width: fit-content;
  margin: 0 auto 26px;
  padding: 5px 13px;
  border-radius: 999px;
  background: var(--color-danger-soft);
  color: var(--color-danger-text);
  font-size: 14px;
  font-weight: 750;
  line-height: 1.3;
}
.question-round-status {
  margin: -10px 0 20px;
  color: var(--color-text-secondary);
  text-align: center;
  font-size: 13px;
  font-weight: 700;
}
.question-round-status p { margin-bottom: 0; }
.round-mastered-count { color: var(--color-primary-text); font-weight: 800; }
.last-round-word-hint { margin-top: 5px; color: var(--color-warning-text); }
.word-summary { text-align: center; }

.options-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}
.option-button {
  display: flex;
  align-items: center;
  width: 100%;
  min-width: 0;
  min-height: 58px;
  padding: 10px 14px;
  border: 1px solid var(--line);
  border-radius: 9px;
  background: var(--color-surface);
  color: var(--ink);
  cursor: pointer;
  text-align: left;
  transition: border-color 140ms ease, background 140ms ease, box-shadow 140ms ease, transform 140ms ease;
}
.option-button:hover:not(:disabled) { border-color: var(--color-primary-border); transform: translateY(-1px); }
.option-button:focus-visible, .button:focus-visible, .nav-link:focus-visible, .mode-button:focus-visible {
  outline: 3px solid var(--color-primary-focus);
  outline-offset: 2px;
}
.option-button.selected {
  border-color: var(--color-primary);
  background: var(--color-primary-soft);
  box-shadow: inset 0 0 0 1px var(--color-primary);
}
.option-button.correct {
  border-color: var(--color-success);
  background: var(--color-success-soft);
  color: var(--color-success-text);
  box-shadow: inset 0 0 0 1px var(--color-success);
}
.option-button.incorrect {
  border-color: var(--color-danger);
  background: var(--color-danger-answer-soft);
  color: var(--color-danger-text);
  box-shadow: inset 0 0 0 1px var(--color-danger);
}
.option-button:disabled { cursor: default; opacity: 1; }
.option-letter {
  display: inline-grid;
  width: 34px;
  height: 34px;
  flex: 0 0 34px;
  margin-right: 12px;
  place-items: center;
  border-radius: 50%;
  background: var(--color-surface-soft);
  color: var(--color-text-secondary);
  font-size: 14px;
  font-weight: 800;
}
.selected .option-letter { background: var(--color-primary); color: var(--color-surface); }
.correct .option-letter { background: var(--color-success); color: var(--color-surface); }
.incorrect .option-letter { background: var(--color-danger); color: var(--color-surface); }
.option-text { min-width: 0; overflow-wrap: anywhere; line-height: 1.42; }

.feedback {
  min-height: 25px;
  margin: 22px 0 8px;
  text-align: center;
  font-weight: 700;
}
.feedback.validation { color: var(--color-warning-text); }
.feedback.success { color: var(--color-success-text); }
.feedback.error, .feedback.fatal { color: var(--color-danger-text); }
.empty-state { margin: 0 0 18px; color: var(--muted); text-align: center; }
.practice-empty-state .practice-card { padding-block: 52px; }
.practice-empty-state .practice-card .word {
  margin-bottom: 12px;
  font-size: clamp(25px, 4vw, 32px);
  letter-spacing: -0.02em;
}
.practice-empty-state .practice-card .prompt {
  max-width: 480px;
  margin: 0 auto 18px;
  font-size: 15px;
  line-height: 1.65;
}
.practice-empty-state .practice-card .empty-state {
  margin: 0;
  color: var(--color-primary-text);
  font-size: 14px;
  font-weight: 700;
}
.actions { display: flex; justify-content: center; min-height: 48px; }
.decision-actions {
  display: flex;
  width: min(100%, 388px);
  justify-content: center;
  gap: 12px;
}
.decision-actions .button {
  width: 100%;
  min-width: 0;
  flex: 1 1 0;
  box-shadow: 0 5px 14px var(--color-shadow);
}

.button {
  min-width: 188px;
  min-height: 48px;
  padding: 10px 22px;
  border: 1px solid transparent;
  border-radius: 8px;
  cursor: pointer;
  font-weight: 750;
}
.button-primary { background: var(--color-primary); color: var(--color-surface); }
.button-primary:hover:not(:disabled) { background: var(--color-primary-hover); }
.button-danger-solid { background: var(--color-danger); color: var(--color-surface); }
.button-danger-solid:hover:not(:disabled) { background: var(--color-danger-hover); }
.button-danger-solid:active:not(:disabled), .decision-actions .button:active:not(:disabled) {
  box-shadow: 0 3px 8px var(--color-shadow);
  transform: translateY(1px);
}
.button-danger-solid:focus-visible {
  outline-color: var(--color-danger-focus);
}
.button-secondary { border-color: var(--color-danger-border); background: var(--color-surface); color: var(--color-danger-text); }
.button-secondary:hover:not(:disabled) { background: var(--color-danger-soft); }
.button-quiet { border-color: var(--color-border); background: var(--color-surface); color: var(--color-text-secondary); }
.button-quiet:hover:not(:disabled) { background: var(--color-surface-soft); }
.button-outline { border-color: var(--color-border); background: var(--color-surface); color: var(--color-primary-text); }
.button-outline:hover:not(:disabled) { border-color: var(--color-primary-border); background: var(--color-primary-soft); }
.button-compact { min-width: 0; min-height: 40px; padding: 7px 14px; }
.button-full { width: 100%; min-width: 0; }
.button:disabled { cursor: not-allowed; opacity: 0.5; }

.sidebar { min-width: 0; align-self: stretch; }
.sidebar-card { display: flex; height: 100%; min-width: 0; padding: 20px; flex-direction: column; }
.sidebar-review-summary { margin-bottom: 20px; padding-bottom: 20px; border-bottom: 1px solid var(--color-border-soft); }
.sidebar-review-count-row { display: flex; align-items: end; justify-content: space-between; gap: 16px; }
.sidebar-review-count-row h2 { margin: 0; font-size: 19px; }
.sidebar-review-count-row strong { color: var(--color-danger); font-size: 34px; line-height: 1; }
.sidebar-heading { margin-bottom: 16px; }
.sidebar-heading h3 { margin: 0; font-size: 19px; }
.review-ranking { margin: 0 0 14px; padding: 0; list-style: none; }
.review-ranking li {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-width: 0;
  padding: 10px 4px;
  gap: 12px;
  border-bottom: 1px solid var(--color-border-soft);
}
.review-ranking li span { min-width: 0; overflow-wrap: anywhere; }
.review-ranking li strong { flex: 0 0 auto; color: var(--color-danger-text); font-size: 13px; }
.ranking-empty { margin: 8px 0 18px; color: var(--muted); text-align: center; font-size: 14px; }

.wordbook-shell {
  width: min(1180px, calc(100% - 48px));
  margin: 0 auto;
  padding: 24px 0 52px;
}
.wordbook-panel {
  overflow: hidden;
  border: 1px solid var(--color-border-soft);
  border-radius: 14px;
  background: var(--panel);
  box-shadow: var(--shadow);
}
.wordbook-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 24px 28px 20px;
  gap: 24px;
  border-bottom: 1px solid var(--color-border-soft);
}
.wordbook-header h1 { margin: 0 0 5px; font-size: 28px; }
.wordbook-header p { margin: 0; color: var(--muted); }
.wordbook-toolbar {
  display: flex;
  align-items: end;
  padding: 18px 28px;
  gap: 18px;
  background: var(--color-surface-soft);
  border-bottom: 1px solid var(--color-border-soft);
}
.wordbook-search { display: grid; min-width: 260px; flex: 1; gap: 7px; color: var(--color-text-secondary); font-size: 13px; font-weight: 700; }
.wordbook-search-field { position: relative; display: block; }
.wordbook-search input {
  width: 100%;
  min-height: 44px;
  padding: 9px 42px 9px 13px;
  border: 1px solid var(--line);
  border-radius: 9px;
  background: var(--color-surface);
  color: var(--ink);
  outline: none;
}
.wordbook-search input:focus { border-color: var(--color-primary); box-shadow: 0 0 0 3px var(--color-primary-focus); }
.wordbook-search input::-webkit-search-cancel-button { appearance: none; }
.wordbook-search-clear {
  position: absolute;
  top: 50%;
  right: 7px;
  display: grid;
  width: 30px;
  height: 30px;
  padding: 0;
  place-items: center;
  transform: translateY(-50%);
  border: 0;
  border-radius: 7px;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font-size: 21px;
  font-weight: 500;
  line-height: 1;
}
.wordbook-search-clear:hover { background: var(--color-primary-soft); color: var(--color-primary-text); }
.wordbook-filters { display: flex; gap: 6px; }
.wordbook-filter {
  min-height: 40px;
  padding: 7px 13px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--color-surface);
  color: var(--color-text-secondary);
  cursor: pointer;
  white-space: nowrap;
  font-weight: 700;
}
.wordbook-filter.active { border-color: var(--color-primary-border); background: var(--color-primary-soft); color: var(--color-primary-text); }
.wordbook-list-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 46px;
  padding: 9px 28px;
  gap: 16px;
  border-bottom: 1px solid var(--color-border-soft);
  color: var(--color-text-secondary);
  font-size: 13px;
}
.wordbook-list-heading p { margin: 0; color: var(--color-primary-text); font-weight: 700; }
.wordbook-list { content-visibility: auto; }
.wordbook-category-node { border-bottom: 1px solid var(--color-border-soft); }
.wordbook-category-node:last-child { border-bottom: 0; }
.wordbook-category-toggle {
  display: grid;
  grid-template-columns: 22px minmax(0, 1fr) auto;
  align-items: center;
  width: 100%;
  min-height: 58px;
  padding: 12px 28px;
  gap: 10px;
  border: 0;
  background: var(--color-surface);
  color: var(--ink);
  cursor: pointer;
  text-align: left;
}
.wordbook-category-toggle:hover { background: var(--color-surface-soft); }
.wordbook-category-toggle strong { min-width: 0; overflow-wrap: anywhere; font-size: 16px; }
.wordbook-category-toggle > span:last-child { color: var(--muted); font-size: 13px; }
.wordbook-category-arrow { color: var(--color-primary-text); font-size: 12px; transition: transform 140ms ease; }
.wordbook-category-toggle[aria-expanded="true"] .wordbook-category-arrow { transform: rotate(90deg); }
.wordbook-category-words { border-top: 1px solid var(--color-border-soft); background: var(--color-surface-soft); }
.wordbook-category-words .wordbook-row { padding-left: 60px; background: var(--color-surface-soft); }
.wordbook-row {
  display: grid;
  grid-template-columns: minmax(150px, 0.7fr) minmax(260px, 1.8fr) minmax(160px, 0.55fr);
  align-items: center;
  min-width: 0;
  padding: 16px 28px;
  gap: 22px;
  border-bottom: 1px solid var(--color-border-soft);
}
.wordbook-row:last-child { border-bottom: 0; }
.wordbook-row:hover { background: var(--color-surface-soft); }
.wordbook-word { min-width: 0; }
.wordbook-word strong { display: block; margin-bottom: 5px; overflow-wrap: anywhere; font-size: 18px; }
.word-detail-trigger {
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--color-primary-text);
  cursor: pointer;
  font-size: 13px;
  font-weight: 700;
}
.question-details-row {
  width: min(100%, 388px);
  margin: 12px auto 0;
  text-align: center;
}
.question-details-row .word-detail-trigger {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 8px 16px;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  background: var(--color-surface);
  color: var(--color-primary-text);
  font-size: 14px;
  box-shadow: 0 3px 10px var(--color-shadow);
}
.question-details-row .word-detail-trigger:hover:not(:disabled) { border-color: var(--color-primary-border); background: var(--color-primary-soft); }
.question-details-row .word-detail-trigger:active:not(:disabled) {
  box-shadow: 0 2px 6px var(--color-shadow);
  transform: translateY(1px);
}
.wordbook-categories { display: flex; min-width: 0; flex-wrap: wrap; gap: 6px; }
.wordbook-category {
  padding: 5px 8px;
  border-radius: 6px;
  background: var(--color-surface-soft);
  color: var(--color-text-secondary);
  overflow-wrap: anywhere;
  font-size: 13px;
  line-height: 1.35;
}
.wordbook-status-cell { display: flex; align-items: center; justify-content: flex-end; min-width: 0; flex-wrap: wrap; gap: 8px; }
.wordbook-status-badge {
  display: inline-flex;
  align-items: center;
  min-height: 30px;
  padding: 5px 10px;
  border-radius: 999px;
  background: var(--color-surface-soft);
  color: var(--muted);
  font-size: 12px;
  font-weight: 800;
  white-space: nowrap;
}
.wordbook-status-badge[data-status="review"] { background: var(--color-danger-soft); color: var(--color-danger-text); }
.wordbook-status-badge[data-status="remembered"] { background: var(--color-success-soft); color: var(--color-success-text); }
.wordbook-status-action { border: 1px solid var(--color-border); background: var(--color-surface); color: var(--color-primary-text); }
.wordbook-status-action:hover:not(:disabled) { border-color: var(--color-primary-border); background: var(--color-primary-soft); }
.wordbook-empty { padding: 52px 24px; color: var(--muted); text-align: center; }

.category-create-form {
  display: grid;
  padding: 20px 28px;
  gap: 8px;
  border-bottom: 1px solid var(--color-border-soft);
  background: var(--color-surface-soft);
}
.category-create-form label { color: var(--color-text-secondary); font-size: 13px; font-weight: 800; }
.category-create-controls { display: flex; align-items: center; gap: 10px; }
.category-create-controls input,
.category-edit-input {
  min-width: 0;
  min-height: 42px;
  padding: 9px 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--color-surface);
  color: var(--ink);
  outline: none;
}
.category-create-controls input { width: min(100%, 520px); }
.category-create-controls input:focus,
.category-edit-input:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-focus);
}
.category-manager-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 48px;
  padding: 9px 28px;
  gap: 16px;
  border-bottom: 1px solid var(--color-border-soft);
  color: var(--color-text-secondary);
  font-size: 13px;
}
.category-manager-heading p { margin: 0; color: var(--color-primary-text); font-weight: 700; }
.category-manager-heading p[data-tone="error"] { color: var(--color-danger-text); }
.category-manager-list { content-visibility: auto; }
.category-manager-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  min-height: 64px;
  padding: 10px 28px;
  gap: 18px;
  border-bottom: 1px solid var(--color-border-soft);
  background: var(--color-surface);
}
.category-manager-row:last-child { border-bottom: 0; }
.category-manager-row:hover { background: var(--color-surface-soft); }
.category-manager-row.editing { background: var(--color-primary-soft); }
.category-manager-info { display: flex; align-items: baseline; min-width: 0; gap: 14px; }
.category-manager-info strong { min-width: 0; overflow-wrap: anywhere; font-size: 16px; }
.category-manager-info span { flex: 0 0 auto; color: var(--muted); font-size: 13px; }
.category-edit-input { width: min(100%, 560px); }
.category-manager-actions { display: flex; justify-content: flex-end; gap: 7px; }

.vocabulary-manager-tabs {
  display: flex;
  padding: 12px 28px 0;
  gap: 6px;
  border-bottom: 1px solid var(--color-border-soft);
  background: var(--color-surface-soft);
}
.vocabulary-manager-tab {
  min-height: 40px;
  padding: 8px 16px;
  border: 1px solid transparent;
  border-bottom: 0;
  border-radius: 8px 8px 0 0;
  background: transparent;
  color: var(--color-text-secondary);
  cursor: pointer;
  font-weight: 800;
}
.vocabulary-manager-tab.active {
  border-color: var(--color-primary-border);
  background: var(--color-surface);
  color: var(--color-primary-text);
}
.word-create-form {
  display: grid;
  grid-template-columns: minmax(200px, 0.75fr) minmax(340px, 1.5fr) auto;
  align-items: end;
  padding: 20px 28px;
  gap: 16px;
  border-bottom: 1px solid var(--color-border-soft);
  background: var(--color-surface-soft);
}
.word-create-heading { display: grid; gap: 8px; }
.word-create-heading label,
.word-category-picker legend { color: var(--color-text-secondary); font-size: 13px; font-weight: 800; }
.word-create-heading input {
  width: 100%;
  min-height: 42px;
  padding: 9px 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--color-surface);
  color: var(--ink);
  outline: none;
}
.word-create-heading input:focus { border-color: var(--color-primary); box-shadow: 0 0 0 3px var(--color-primary-focus); }
.word-category-picker { min-width: 0; margin: 0; padding: 0; border: 0; }
.word-category-picker legend { margin-bottom: 8px; padding: 0; }
.word-category-options {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  overflow-y: auto;
  max-height: 156px;
  padding: 7px;
  gap: 4px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--color-surface);
}
.word-category-option {
  display: flex;
  align-items: flex-start;
  min-width: 0;
  padding: 6px 7px;
  gap: 7px;
  border-radius: 6px;
  color: var(--color-text-secondary);
  cursor: pointer;
  font-size: 13px;
  line-height: 1.35;
}
.word-category-option:hover { background: var(--color-primary-soft); }
.word-category-option input { flex: 0 0 auto; margin: 2px 0 0; accent-color: var(--color-primary); }
.word-category-option span { min-width: 0; overflow-wrap: anywhere; }
.word-manager-toolbar { padding: 16px 28px; border-bottom: 1px solid var(--color-border-soft); }
.word-manager-toolbar .wordbook-search { max-width: 620px; }
.word-manager-list { content-visibility: auto; }
.word-manager-row {
  display: grid;
  grid-template-columns: minmax(160px, 0.7fr) minmax(280px, 1.7fr) auto;
  align-items: center;
  min-height: 62px;
  padding: 11px 28px;
  gap: 20px;
  border-bottom: 1px solid var(--color-border-soft);
  background: var(--color-surface);
}
.word-manager-row:last-child { border-bottom: 0; }
.word-manager-row:hover { background: var(--color-surface-soft); }
.word-manager-word { min-width: 0; overflow-wrap: anywhere; font-size: 17px; }
.word-manager-actions { display: flex; align-items: center; justify-content: flex-end; gap: 9px; }
.word-manager-actions .button { min-width: 58px; }
.word-manager-categories { display: flex; min-width: 0; flex-wrap: wrap; gap: 6px; }
.word-manager-categories span {
  padding: 5px 8px;
  border-radius: 6px;
  background: var(--color-surface-soft);
  color: var(--color-text-secondary);
  overflow-wrap: anywhere;
  font-size: 13px;
}
.word-manager-row-editing { display: block; padding-block: 16px; background: var(--color-surface-soft); }
.word-manager-edit-form {
  display: grid;
  grid-template-columns: minmax(190px, 0.7fr) minmax(340px, 1.6fr) auto;
  align-items: end;
  gap: 16px;
}
.word-manager-edit-heading {
  display: flex;
  grid-column: 1 / -1;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
}
.word-manager-edit-heading span { color: var(--muted); overflow-wrap: anywhere; font-size: 12px; }
.word-manager-edit-display { display: grid; gap: 8px; color: var(--color-text-secondary); font-size: 13px; font-weight: 800; }
.word-manager-edit-display input {
  width: 100%;
  min-height: 42px;
  padding: 9px 12px;
  border: 1px solid var(--color-primary-border);
  border-radius: 8px;
  background: var(--color-surface);
  color: var(--ink);
  outline: none;
  box-shadow: 0 0 0 3px var(--color-primary-focus);
}
.word-manager-edit-categories { max-height: 190px; }
.word-manager-edit-actions { display: flex; align-items: center; gap: 8px; }

.button-danger { border-color: transparent; background: transparent; color: var(--color-danger-text); }
.button-danger:hover:not(:disabled) { background: var(--color-danger-soft); }
.category-create-launcher {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  min-height: 62px;
  padding: 12px 28px;
  gap: 16px;
  border-bottom: 1px solid var(--color-border-soft);
  background: var(--color-surface-soft);
}
.category-create-launcher > #toggle-add-category { min-width: 132px; }
.category-create-launcher-actions { display: flex; align-items: center; justify-content: flex-end; gap: 8px; }
.category-create-form-expanded {
  grid-template-columns: minmax(220px, 0.7fr) minmax(360px, 1.5fr);
  padding-block: 18px;
  gap: 16px 22px;
}
.category-create-name { display: grid; align-content: start; gap: 8px; }
.category-create-name input,
.category-create-word-row input,
.category-tree-inline-form input,
.category-tree-add-form input {
  width: 100%;
  min-width: 0;
  min-height: 42px;
  padding: 9px 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--color-surface);
  color: var(--ink);
  outline: none;
}
.category-create-name input:focus,
.category-create-word-row input:focus,
.category-tree-inline-form input:focus,
.category-tree-add-form input:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-focus);
}
.category-create-words { min-width: 0; margin: 0; padding: 0; border: 0; }
.category-create-words legend { margin-bottom: 8px; padding: 0; color: var(--color-text-secondary); font-size: 13px; font-weight: 800; }
.category-create-word-row {
  display: grid;
  grid-template-columns: 28px minmax(0, 1fr) auto;
  align-items: center;
  margin-bottom: 8px;
  gap: 8px;
}
.category-create-word-row strong { color: var(--color-text-secondary); text-align: right; }
.category-create-actions { display: flex; grid-column: 1 / -1; justify-content: flex-end; gap: 8px; }
.category-manager-toolbar { padding: 16px 28px; border-bottom: 1px solid var(--color-border-soft); }
#category-manager-notice { white-space: pre-line; }
.category-manager-toolbar .wordbook-search { max-width: 620px; }
.category-tree-item { border-bottom: 1px solid var(--color-border-soft); background: var(--color-surface); }
.category-tree-item:last-child { border-bottom: 0; }
.category-tree-header {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr) auto;
  align-items: center;
  min-height: 64px;
  padding: 9px 28px 9px 18px;
  gap: 10px;
}
.category-tree-header:hover { background: var(--color-surface-soft); }
.category-tree-toggle {
  display: grid;
  width: 32px;
  height: 32px;
  padding: 0;
  place-items: center;
  border: 0;
  border-radius: 7px;
  background: transparent;
  color: var(--color-text-secondary);
  cursor: pointer;
  font-size: 18px;
}
.category-tree-toggle:hover { background: var(--color-primary-soft); color: var(--color-primary-text); }
.category-tree-summary { display: flex; align-items: baseline; min-width: 0; gap: 14px; }
.category-tree-summary strong { min-width: 0; overflow-wrap: anywhere; font-size: 16px; }
.category-tree-summary span { flex: 0 0 auto; color: var(--muted); font-size: 13px; }
.category-tree-summary .vocabulary-ownership-badge {
  width: fit-content;
  padding: 2px 8px;
  border: 1px solid var(--color-border-soft);
  border-radius: 999px;
  background: var(--color-surface-soft);
  color: var(--color-text-secondary);
  font-size: 12px;
  font-weight: 700;
}
.category-tree-actions,
.category-tree-word-actions { display: flex; align-items: center; justify-content: flex-end; gap: 5px; }
.category-tree-actions .button,
.category-tree-word-actions .button { min-width: 54px; padding-inline: 9px; }
.category-tree-name-form { min-width: 0; }
.category-tree-body { padding: 0 18px 14px 62px; background: var(--color-surface-soft); }
.category-tree-words { overflow: hidden; border: 1px solid var(--color-border-soft); border-radius: 9px; background: var(--color-surface); }
.category-tree-word-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  min-height: 50px;
  padding: 7px 12px 7px 16px;
  gap: 12px;
  border-bottom: 1px solid var(--color-border-soft);
}
.category-tree-word-row:last-child { border-bottom: 0; }
.category-tree-word-row strong { min-width: 0; overflow-wrap: anywhere; font-size: 15px; }
.category-tree-word-form { display: grid; grid-template-columns: minmax(0, 1fr) auto; align-items: center; gap: 10px; }
.category-tree-word-form span { color: var(--muted); font-size: 11px; white-space: nowrap; }
.category-tree-add-word { margin-top: 10px; }
.category-tree-add-form {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  margin-top: 10px;
  gap: 8px;
}
.vocabulary-delete-card { width: min(100%, 460px); }
.vocabulary-delete-card .completion-message { max-width: 380px; }
.vocabulary-import-card { width: min(100%, 520px); }
.vocabulary-import-summary {
  display: grid;
  margin: 20px 0 24px;
  overflow: hidden;
  border: 1px solid var(--color-border);
  border-radius: 10px;
  background: rgb(253 252 248 / 76%);
  text-align: left;
}
.vocabulary-import-summary p { margin: 0; padding: 13px 16px; color: var(--muted); }
.vocabulary-import-summary p + p { border-top: 1px solid var(--color-border-soft); }
.vocabulary-import-summary strong { color: var(--color-primary-text); }

.vocabulary-card-overlay {
  position: fixed;
  z-index: 1100;
  inset: 0;
  display: grid;
  padding: 20px;
  place-items: center;
  overflow: hidden;
  background: var(--color-overlay);
  -webkit-backdrop-filter: blur(4px);
  backdrop-filter: blur(4px);
}
.vocabulary-card-overlay[hidden] { display: none !important; }
.vocabulary-card-host {
  width: min(88vw, 430px);
  height: min(74vh, calc(88vw + 96px), 520px);
  height: min(74dvh, calc(88vw + 96px), 520px);
  min-height: 0;
}
.vocabulary-card {
  display: grid;
  grid-template-rows: minmax(0, 1fr) auto;
  width: 100%;
  height: 100%;
  min-width: 0;
  overflow: hidden;
  border: 1px solid var(--color-border);
  border-radius: 18px;
  background: var(--color-surface);
  box-shadow: 0 20px 52px var(--color-shadow-strong);
  color: var(--color-text-secondary);
  line-height: 1.65;
}
.vocabulary-card-content {
  min-width: 0;
  min-height: 0;
  padding: 24px 20px 32px;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  overscroll-behavior: contain;
}
.vocabulary-card-footer {
  padding: 12px 20px;
  background: rgb(253 252 248 / 97%);
  box-shadow: 0 -6px 18px var(--color-shadow);
}
.vocabulary-card-close { width: 100%; min-height: 48px; }
.vocabulary-details-view { min-width: 0; }
.vocabulary-details-word {
  margin: 0 0 5px;
  color: var(--ink);
  font-size: clamp(36px, 10vw, 46px);
  font-weight: 800;
  line-height: 1.15;
  overflow-wrap: anywhere;
  text-align: center;
}
.vocabulary-details-empty { margin: 0; padding: 32px 0; color: var(--muted); text-align: center; }
.vocabulary-details-phonetic {
  margin: 0;
  color: var(--color-text-muted);
  font-size: 17px;
  line-height: 1.35;
  overflow-wrap: anywhere;
  text-align: center;
}
.vocabulary-details-section, .vocabulary-details-meanings { margin-top: 24px; }
.vocabulary-details-heading { margin: 0 0 9px; color: var(--ink); font-size: 15px; }
.vocabulary-details-meaning {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 3px 0;
  overflow-wrap: anywhere;
}
.vocabulary-details-pos { flex: 0 0 auto; color: var(--ink); font-weight: 800; }
.vocabulary-details-definition, .vocabulary-details-text { margin: 0; overflow-wrap: anywhere; }
.vocabulary-details-collocation-list {
  display: grid;
  margin: 0;
  padding: 0;
  gap: 5px;
  list-style: none;
}
.vocabulary-details-collocation {
  display: grid;
  grid-template-columns: 12px minmax(0, 1fr);
  padding: 0;
  color: var(--ink);
  overflow-wrap: anywhere;
}
.vocabulary-details-collocation::before { content: "-"; }
.vocabulary-details-example {
  padding: 0;
}
.vocabulary-details-example + .vocabulary-details-example { margin-top: 18px; }
.vocabulary-details-example p { margin: 0; overflow-wrap: anywhere; }
.vocabulary-details-example-en { color: var(--ink); }
.vocabulary-details-example-zh { margin-top: 5px !important; color: var(--color-text-muted); font-size: 0.9em; }

@media (min-width: 768px) {
  .vocabulary-card-overlay {
    padding: 32px;
    background: var(--color-overlay);
  }
  .vocabulary-card-host { width: min(100%, 720px); height: min(90dvh, 900px); }
  .vocabulary-card {
    box-shadow: 0 20px 52px var(--color-shadow-strong);
  }
  .vocabulary-card-content { padding: 38px 54px 48px; }
  .vocabulary-card-footer { padding-inline: 54px; }
  .vocabulary-details-word { font-size: 50px; }
}

@media (max-width: 1199px) {
  .topbar-inner { grid-template-columns: auto 1fr; gap: 14px 20px; padding: 12px 0; }
  .primary-nav { justify-content: flex-end; }
  .mode-switch { grid-column: 1 / -1; justify-self: end; }
  .stat-block { padding-inline: 20px; }
  .workspace-grid { grid-template-columns: 1fr; }
  .sidebar { display: none; }
}

@media (max-width: 980px) {
  .practice-shell, .topbar-inner, .wordbook-shell { width: min(100% - 32px, 920px); }
  .wordbook-toolbar { align-items: stretch; flex-direction: column; }
  .wordbook-filters { width: 100%; }
  .wordbook-filter { flex: 1; }
  .wordbook-row { grid-template-columns: minmax(140px, 0.7fr) minmax(220px, 1.5fr) minmax(150px, 0.6fr); gap: 16px; }
}

@media (max-width: 768px) {
  input,
  textarea {
    font-size: 16px;
  }
}

@media (max-width: 760px) {
  .topbar-inner { display: flex; align-items: stretch; flex-direction: column; }
  .brand { justify-content: center; }
  .primary-nav { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .nav-link { min-width: 0; white-space: normal; text-align: center; }
  .mode-switch { display: grid; grid-template-columns: repeat(2, 1fr); width: 100%; }
  .practice-shell { padding-top: 14px; }
  .stats-panel {
    margin-bottom: 10px;
    padding: 6px;
  }
  .stat-block { min-height: 66px; padding: 7px 15px; }
  .stat-heading { margin-bottom: 9px; }
  .round-panel { align-items: stretch; flex-direction: column; gap: 12px; }
  .round-panel-title { padding: 0 0 10px; border-right: 0; border-bottom: 1px solid var(--color-border-soft); }
  .round-summary { margin-left: 0; }
  .wordbook-row { grid-template-columns: 1fr; align-items: start; gap: 12px; }
}

@media (max-width: 560px) {
  .practice-shell, .topbar-inner, .wordbook-shell { width: min(100% - 20px, 520px); }
  .topbar-inner {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr);
    min-height: 0;
    padding: 7px 0;
    gap: 5px;
  }
  .brand { grid-column: 1 / -1; justify-content: center; font-size: 20px; }
  .brand-mark { width: 28px; height: 28px; flex-basis: 28px; font-size: 17px; }
  .primary-nav {
    display: flex;
    grid-column: 2;
    grid-row: 2;
    justify-self: end;
    padding: 0;
    border: 0;
    background: transparent;
    gap: 8px;
  }
  .primary-nav #practice-nav, .primary-nav .nav-start-round { display: none; }
  .primary-nav .nav-link:nth-child(n + 3) { display: inline-flex; }
  .primary-nav .nav-link:nth-child(n + 3) { border-color: var(--color-border); background: var(--color-surface); }
  .mode-switch {
    display: grid;
    grid-column: 1;
    grid-row: 2;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    width: auto;
    justify-self: start;
    padding: 2px;
    gap: 2px;
  }
  .nav-link, .mode-button {
    min-width: 0;
    min-height: 34px;
    padding: 4px 5px;
    font-size: 11px;
    line-height: 1.2;
    text-align: center;
    white-space: normal;
  }
  .practice-shell { padding-top: 6px; }
  .stats-panel { margin-bottom: 7px; }
  .stat-block { min-height: 58px; padding: 6px 10px; }
  .stat-heading { margin-bottom: 7px; gap: 8px; font-size: 13px; }
  .stat-progress-count { font-size: 14px; }
  .progress-track { height: 7px; }
  .practice-card { order: 1; }
  .round-panel { order: 2; margin: 12px 0 0; }
  .round-setup { align-items: stretch; flex-direction: column; }
  .round-setup label { white-space: normal; }
  .round-setup input { width: 100%; }
  .round-active { align-items: stretch; flex-direction: column; }
  .round-active .button { width: 100%; }
  .round-panel[data-active-round="true"] { align-items: stretch; }
  .round-panel[data-active-round="true"] .round-active,
  .round-panel[data-active-round="true"] .round-active .button { width: 100%; }
  .practice-card { padding: 14px 12px 18px; }
  .word { margin: 0 0 3px; font-size: clamp(32px, 11vw, 42px); }
  .prompt { margin-bottom: 10px; font-size: 14px; }
  .prompt.prompt-multiple { margin-bottom: 10px; }
  .question-utility-row {
    display: flex;
    align-items: flex-start;
    justify-content: flex-end;
    min-height: 28px;
    margin: 0 0 8px;
    gap: 8px;
  }
  .question-round-status { min-width: 0; margin: 0; flex: 1; text-align: left; }
  .options-grid { grid-template-columns: 1fr; gap: 8px; }
  .option-button { min-height: 56px; padding: 9px 12px; }
  .option-letter { margin-right: 10px; }
  .feedback { margin: 12px 0 6px; }
  .feedback:empty { min-height: 0; margin-top: 7px; }
  .actions, .decision-actions { width: 100%; }
  .decision-actions { flex-direction: row; gap: 8px; }
  .actions .button, .decision-actions .button { width: 100%; min-width: 0; }
  .decision-actions .button { flex: 1 1 0; padding-inline: 10px; }
  .sidebar-card { padding: 17px; }
  .completion-modal { padding: 16px; }
  .completion-card { width: min(100%, 358px); padding: 24px 18px; }
  .completion-card h2 { font-size: 22px; }
  .completion-actions { display: grid; grid-template-columns: 1fr; }
  .completion-actions .button { width: 100%; }
  .account-card { width: min(100%, 368px); padding: 20px 16px; }
  .account-dialog-header { margin-bottom: 15px; }
  .account-form input { font-size: 16px; }
  .cloud-learning-setup-card { width: min(100%, 368px); padding: 20px 16px; }
  .cloud-learning-setup-actions { grid-template-columns: 1fr; }
  .wordbook-shell { padding: 10px 0 30px; }
  .wordbook-header { align-items: center; padding: 14px 16px; flex-direction: row; gap: 12px; }
  .wordbook-header > div { min-width: 0; flex: 1; }
  .wordbook-header .section-kicker, .wordbook-header p { display: none; }
  .wordbook-header h1 { margin: 0; font-size: 24px; }
  .wordbook-header .button { width: auto; min-width: 0; flex: 0 0 auto; }
  .wordbook-toolbar { padding: 14px; gap: 12px; }
  .wordbook-search { min-width: 0; }
  .wordbook-filters { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 4px; }
  .wordbook-filter { min-width: 0; padding: 6px 3px; font-size: 12px; }
  .wordbook-list-heading { align-items: flex-start; padding: 9px 16px; flex-direction: column; gap: 3px; }
  .wordbook-row { padding: 16px; }
  .wordbook-category-toggle { min-height: 54px; padding: 10px 16px; }
  .wordbook-category-words .wordbook-row,
  .wordbook-row-action,
  .wordbook-row-search {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr) auto;
    align-items: center;
    min-height: 60px;
    padding: 9px 14px;
    gap: 8px;
  }
  .wordbook-category-words .wordbook-row { padding-left: 24px; }
  .wordbook-category-words .wordbook-word strong,
  .wordbook-row-action .wordbook-word strong,
  .wordbook-row-search .wordbook-word strong { margin-bottom: 2px; font-size: 15px; }
  .wordbook-category-words .word-detail-trigger,
  .wordbook-row-action .word-detail-trigger,
  .wordbook-row-search .word-detail-trigger { font-size: 11px; }
  .wordbook-category-words .wordbook-categories,
  .wordbook-row-action .wordbook-categories,
  .wordbook-row-search .wordbook-categories {
    align-items: flex-start;
    flex-direction: column;
    gap: 2px;
  }
  .wordbook-category-words .wordbook-category,
  .wordbook-row-action .wordbook-category,
  .wordbook-row-search .wordbook-category { padding: 0; background: transparent; color: var(--color-text-secondary); }
  .wordbook-category-words .wordbook-status-cell,
  .wordbook-row-action .wordbook-status-cell,
  .wordbook-row-search .wordbook-status-cell { justify-content: flex-end; }
  .wordbook-category-words .wordbook-status-badge,
  .wordbook-row-search .wordbook-status-badge { min-height: 26px; padding: 4px 7px; font-size: 11px; }
  .wordbook-row-action .wordbook-status-action { min-height: 36px; padding: 6px 8px; font-size: 12px; white-space: nowrap; }
  .wordbook-categories { gap: 5px; }
  .wordbook-category { font-size: 12px; }
  .wordbook-status-cell { justify-content: flex-start; }
  .category-create-form { padding: 14px 16px; }
  .category-create-controls { align-items: stretch; flex-direction: column; }
  .category-create-controls input, .category-create-controls .button { width: 100%; }
  .category-manager-heading { align-items: flex-start; padding: 9px 16px; flex-direction: column; gap: 3px; }
  .category-manager-row { min-height: 58px; padding: 9px 16px; gap: 10px; }
  .category-manager-info { align-items: flex-start; flex-direction: column; gap: 3px; }
  .category-manager-info strong { font-size: 15px; }
  .category-manager-actions .button { min-width: 0; padding-inline: 10px; }
  .vocabulary-manager-tabs { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); padding: 10px 14px 0; }
  .vocabulary-manager-tab { min-width: 0; padding-inline: 8px; }
  .word-create-form { grid-template-columns: 1fr; align-items: stretch; padding: 14px 16px; gap: 13px; }
  .word-create-form > .button { width: 100%; }
  .word-category-options { grid-template-columns: 1fr; max-height: 190px; }
  .word-category-option { min-height: 34px; }
  .word-manager-toolbar { padding: 14px 16px; }
  .word-manager-toolbar .wordbook-search { min-width: 0; }
  .word-manager-row {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.25fr) auto;
    min-height: 60px;
    padding: 9px 14px;
    gap: 8px;
  }
  .word-manager-word { font-size: 15px; }
  .word-manager-actions { align-items: flex-end; flex-direction: column; gap: 5px; }
  .word-manager-actions .button { min-width: 52px; min-height: 30px; padding: 4px 8px; font-size: 12px; }
  .word-manager-categories { align-items: flex-start; flex-direction: column; gap: 2px; }
  .word-manager-categories span { padding: 0; background: transparent; color: var(--color-text-secondary); font-size: 12px; }
  .word-manager-row .wordbook-status-badge { min-height: 26px; padding: 4px 7px; font-size: 11px; }
  .word-manager-row-editing { padding: 13px 14px; }
  .word-manager-edit-form { grid-template-columns: 1fr; align-items: stretch; gap: 12px; }
  .word-manager-edit-heading { align-items: flex-start; flex-direction: column; gap: 3px; }
  .word-manager-edit-actions { justify-content: flex-end; }
  .word-manager-edit-actions .button { min-width: 76px; }
  .category-create-launcher { min-height: 56px; padding: 10px 16px; }
  .category-create-launcher > #toggle-add-category { width: 100%; }
  .category-create-launcher-actions { min-width: 0; flex-wrap: wrap; }
  .category-create-form-expanded { grid-template-columns: 1fr; padding: 14px 16px; gap: 14px; }
  .category-create-actions { grid-column: auto; }
  .category-create-word-row { grid-template-columns: 24px minmax(0, 1fr) auto; gap: 6px; }
  .category-create-word-row .button { min-width: 48px; padding-inline: 7px; }
  .category-manager-toolbar { padding: 13px 16px; }
  .category-manager-toolbar .wordbook-search { min-width: 0; }
  .category-tree-header { grid-template-columns: 28px minmax(0, 1fr) auto; min-height: 58px; padding: 8px 12px 8px 8px; gap: 6px; }
  .category-tree-toggle { width: 28px; height: 28px; }
  .category-tree-summary { align-items: flex-start; flex-direction: column; gap: 2px; }
  .category-tree-summary strong { font-size: 14px; }
  .category-tree-summary span { font-size: 11px; }
  .category-tree-actions .button,
  .category-tree-word-actions .button { min-width: 44px; min-height: 30px; padding: 4px 6px; font-size: 11px; }
  .category-tree-body { padding: 0 10px 10px 36px; }
  .category-tree-word-row { min-height: 46px; padding: 6px 7px 6px 10px; gap: 6px; }
  .category-tree-word-row strong { font-size: 13px; }
  .category-tree-word-form { grid-template-columns: 1fr; gap: 3px; }
  .category-tree-word-form span { overflow-wrap: anywhere; white-space: normal; }
  .category-tree-add-form { grid-template-columns: minmax(0, 1fr) auto; }
}