/* ===================================================
   Japanese50 — Japonca Öğrenme Programı
   Tüm Stiller
   =================================================== */

/* === 1. CSS Custom Properties === */
:root {
  --color-primary: #c0392b;
  --color-primary-dark: #962d22;
  --color-primary-light: #e74c3c;
  --color-primary-soft: rgba(192, 57, 43, 0.14);
  --color-secondary: #2d3436;
  --color-bg: #f5f6fa;
  --color-card: #ffffff;
  --color-text: #2d3436;
  --color-text-light: #636e72;
  --color-text-muted: #b2bec3;
  --color-success: #00b894;
  --color-success-light: #e6f9f4;
  --color-error: #d63031;
  --color-error-light: #fde8e8;
  --color-warning: #fdcb6e;
  --color-border: #dfe6e9;
  --color-border-light: #eef1f3;
  --color-accent: #6c5ce7;
  --color-accent-light: #a29bfe;

  --font-main: 'Segoe UI', system-ui, -apple-system, sans-serif;
  --font-japanese: 'Noto Sans JP', 'Yu Gothic', 'Meiryo', 'MS Gothic', sans-serif;

  --radius-sm: 8px;
  --radius: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;

  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
  --shadow: 0 2px 8px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.1);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.12);

  --transition-fast: 0.15s ease;
  --transition: 0.25s ease;
  --transition-slow: 0.4s ease;

  --header-height: 60px;
  --max-width: 900px;
}

:root[data-theme-palette="classic"] {
  --color-primary: #c0392b;
  --color-primary-dark: #962d22;
  --color-primary-light: #e74c3c;
  --color-primary-soft: rgba(192, 57, 43, 0.14);
  --color-accent: #6c5ce7;
  --color-accent-light: #a29bfe;
}

:root[data-theme-palette="ocean"] {
  --color-primary: #1e6bb8;
  --color-primary-dark: #16518d;
  --color-primary-light: #3b8de0;
  --color-primary-soft: rgba(30, 107, 184, 0.16);
  --color-accent: #0f8aa8;
  --color-accent-light: #67c0d2;
}

:root[data-theme-palette="forest"] {
  --color-primary: #2f8f4f;
  --color-primary-dark: #246d3c;
  --color-primary-light: #47b86b;
  --color-primary-soft: rgba(47, 143, 79, 0.16);
  --color-accent: #7a8f2f;
  --color-accent-light: #a8bf5c;
}

:root[data-theme-palette="sunset"] {
  --color-primary: #d35400;
  --color-primary-dark: #a84300;
  --color-primary-light: #e67e22;
  --color-primary-soft: rgba(211, 84, 0, 0.16);
  --color-accent: #c0392b;
  --color-accent-light: #e17055;
}

:root[data-theme-mode="dark"] {
  --color-secondary: #e6edf3;
  --color-bg: #101419;
  --color-card: #182029;
  --color-text: #e6edf3;
  --color-text-light: #b2bec9;
  --color-text-muted: #7f8d99;
  --color-success-light: rgba(0, 184, 148, 0.18);
  --color-error-light: rgba(214, 48, 49, 0.2);
  --color-warning: #f0b429;
  --color-border: #2b3743;
  --color-border-light: #23303b;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.35);
  --shadow: 0 2px 8px rgba(0, 0, 0, 0.38);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.45);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
}

:root[data-theme-mode="dark"] input,
:root[data-theme-mode="dark"] select,
:root[data-theme-mode="dark"] textarea {
  background: var(--color-card);
  color: var(--color-text);
  border-color: var(--color-border);
}

:root[data-theme-mode="dark"] .home-history-item,
:root[data-theme-mode="dark"] .home-mistake-item,
:root[data-theme-mode="dark"] .home-daily-card,
:root[data-theme-mode="dark"] .home-reinforcement-card,
:root[data-theme-mode="dark"] .settings-range-chip,
:root[data-theme-mode="dark"] .settings-palette-option,
:root[data-theme-mode="dark"] .settings-field select,
:root[data-theme-mode="dark"] .preset-folder,
:root[data-theme-mode="dark"] .preset-child-row,
:root[data-theme-mode="dark"] .group-item-row,
:root[data-theme-mode="dark"] .example-word-picker-item {
  background: var(--color-card);
}

:root[data-theme-mode="dark"] .home-daily-card {
  background: linear-gradient(180deg, #1d2833, #17212b);
}

:root[data-theme-mode="dark"] .home-reinforcement-card {
  background: linear-gradient(180deg, #1d2833, #17212b);
}

:root[data-theme-mode="dark"] .settings-palette-option.active,
:root[data-theme-mode="dark"] .preset-child-row.selected,
:root[data-theme-mode="dark"] .group-card.selected,
:root[data-theme-mode="dark"] .group-select-item:hover,
:root[data-theme-mode="dark"] .group-select-item.selected {
  background: rgba(255, 255, 255, 0.06);
}

:root[data-theme-mode="dark"] .home-mistake-type {
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(255, 255, 255, 0.14);
}

:root[data-theme-mode="dark"] .group-item-row-clickable:hover,
:root[data-theme-mode="dark"] .group-item-row-clickable:focus-visible,
:root[data-theme-mode="dark"] .example-word-picker-item:hover,
:root[data-theme-mode="dark"] .example-word-picker-item:focus-visible {
  background: rgba(255, 255, 255, 0.06);
}

:root[data-theme-mode="dark"] .radio-card input:checked + .radio-card-content {
  border-color: var(--color-primary);
  background: rgba(255, 255, 255, 0.06);
  color: var(--color-primary-light);
}

:root[data-theme-mode="dark"] .radio-card input:checked + .radio-card-content small {
  color: var(--color-text-light);
}

:root[data-theme-mode="dark"] .related-reading-tab.active {
  background: rgba(255, 255, 255, 0.06);
  border-color: var(--color-primary);
  color: var(--color-primary-light);
}

:root[data-theme-mode="dark"] .related-reading-tab.active .related-reading-tab-count {
  color: var(--color-primary-light);
}

/* === 2. Reset & Base === */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-main);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

body.modal-open {
  overflow: hidden;
}

a { color: var(--color-primary); text-decoration: none; }
img { max-width: 100%; display: block; }
input, select, button { font-family: inherit; font-size: inherit; }

/* === 3. Typography === */
h1 { font-size: 1.75rem; font-weight: 700; }
h2 { font-size: 1.35rem; font-weight: 600; }
h3 { font-size: 1.1rem; font-weight: 600; }
small { font-size: 0.85rem; color: var(--color-text-light); }

.japanese-text {
  font-family: var(--font-japanese);
}

/* === 4. App Shell & Screens === */
#app {
  position: relative;
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  min-height: 100vh;
  overflow: hidden;
}

.screen {
  display: none;
  min-height: 100vh;
  padding-bottom: 2rem;
  animation: fadeSlideIn 0.3s ease;
}

.screen.active {
  display: block;
}

.screen.slide-in-right {
  animation: slideInRight 0.3s ease forwards;
}

.screen.slide-in-left {
  animation: slideInLeft 0.3s ease forwards;
}

.screen.slide-out-right {
  animation: slideOutRight 0.3s ease forwards;
}

.screen.slide-out-left {
  animation: slideOutLeft 0.3s ease forwards;
}

@keyframes fadeSlideIn {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes slideInRight {
  from { opacity: 0; transform: translateX(60px); }
  to { opacity: 1; transform: translateX(0); }
}

@keyframes slideInLeft {
  from { opacity: 0; transform: translateX(-60px); }
  to { opacity: 1; transform: translateX(0); }
}

@keyframes slideOutRight {
  from { opacity: 1; transform: translateX(0); }
  to { opacity: 0; transform: translateX(60px); }
}

@keyframes slideOutLeft {
  from { opacity: 1; transform: translateX(0); }
  to { opacity: 0; transform: translateX(-60px); }
}

/* === 5. Headers === */
.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.25rem;
  height: var(--header-height);
  background: var(--color-card);
  border-bottom: 1px solid var(--color-border-light);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-left {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.header-brand {
  border: none;
  background: transparent;
  padding: 0;
  cursor: pointer;
  text-align: left;
}

.header-brand:focus-visible {
  outline: 2px solid var(--color-primary-light);
  outline-offset: 4px;
  border-radius: var(--radius-sm);
}

.logo-text {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--color-secondary);
}

.logo-accent {
  color: var(--color-primary);
}

.header-right {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.screen-header {
  display: flex;
  align-items: center;
  padding: 0.75rem 1.25rem;
  height: var(--header-height);
  background: var(--color-card);
  border-bottom: 1px solid var(--color-border-light);
  position: sticky;
  top: 0;
  z-index: 100;
  gap: 0.75rem;
}

.screen-title {
  flex: 1;
  font-size: 1.15rem;
}

.header-spacer {
  width: 40px;
}

.detail-header-actions {
  display: inline-flex;
  align-items: center;
  justify-content: flex-end;
  gap: 0.5rem;
}

/* === 6. Buttons === */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.6rem 1.25rem;
  border: none;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
  position: relative;
  overflow: hidden;
}

.btn::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255,255,255,0.15);
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.btn:active::after {
  opacity: 1;
}

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

.btn-primary:hover {
  background: var(--color-primary-dark);
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

.btn-secondary {
  background: var(--color-border-light);
  color: var(--color-text);
}

.btn-secondary:hover {
  background: var(--color-border);
  transform: translateY(-1px);
}

.btn-accent {
  background: var(--color-accent);
  color: #fff;
}

.btn-accent:hover {
  background: #5b4bd5;
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

.btn-danger {
  background: var(--color-error);
  color: #fff;
}

.btn-danger:hover {
  background: #c0392b;
}

.btn:disabled,
.btn[disabled] {
  opacity: 0.55;
  cursor: not-allowed;
  transform: none !important;
  box-shadow: none !important;
}

.btn-wide { width: 100%; }
.btn-lg { padding: 0.85rem 1.5rem; font-size: 1rem; }
.btn-sm { padding: 0.4rem 0.85rem; font-size: 0.8rem; }

.btn-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border: none;
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--color-text-light);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-icon:hover {
  background: var(--color-border-light);
  color: var(--color-text);
}

.account-header-btn {
  position: relative;
}

.account-status-dot {
  position: absolute;
  right: 6px;
  bottom: 6px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  border: 2px solid var(--color-card);
  background: var(--color-text-muted);
}

.account-header-btn[data-sync-state="synced"] .account-status-dot {
  background: var(--color-success);
}

.account-header-btn[data-sync-state="dirty"] .account-status-dot,
.account-header-btn[data-sync-state="syncing"] .account-status-dot {
  background: var(--color-warning);
}

.account-header-btn[data-sync-state="error"] .account-status-dot,
.account-header-btn[data-sync-state="conflict"] .account-status-dot {
  background: var(--color-error);
}

.account-header-btn[data-sync-state="not-configured"] .account-status-dot,
.account-header-btn[data-sync-state="signed-out"] .account-status-dot {
  background: var(--color-text-muted);
}

.account-header-btn[data-sync-state="syncing"] .account-status-dot {
  animation: account-sync-pulse 1s ease-in-out infinite;
}

@keyframes account-sync-pulse {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.25); opacity: 0.7; }
}

.btn-back {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border: none;
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--color-text);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-back:hover {
  background: var(--color-border-light);
}

/* === 7. Home Screen === */
.home-content {
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.greeting {
  font-size: 1.1rem;
  color: var(--color-text-light);
}

.home-section {
  background: var(--color-card);
  border-radius: var(--radius);
  border: 1px solid var(--color-border-light);
  box-shadow: var(--shadow-sm);
  padding: 1rem;
}

.home-section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}

.home-head-action {
  margin-left: 0;
}

.home-head-actions {
  margin-left: auto;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.home-collapse-btn {
  min-width: 34px;
  padding: 0.35rem 0.45rem;
  line-height: 1;
}

.home-section-collapsed .home-list {
  display: none;
}

.home-section-title {
  font-size: 1rem;
  font-weight: 700;
}

.home-section-note {
  font-size: 0.78rem;
  color: var(--color-text-muted);
  white-space: nowrap;
}

.home-daily-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.75rem;
}

.home-daily-card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 0.85rem;
  background: linear-gradient(180deg, #fff, #fbfbfb);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.home-daily-card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-sm);
  transform: translateY(-1px);
}

.home-daily-card.is-empty {
  cursor: default;
  background: var(--color-bg);
}

.home-daily-card.is-empty:hover {
  border-color: var(--color-border);
  box-shadow: none;
  transform: none;
}

.home-daily-title {
  font-size: 0.72rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-weight: 700;
}

.home-daily-main {
  margin-top: 0.4rem;
  font-size: 2rem;
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-text);
}

.home-daily-reading {
  margin-top: 0.2rem;
  color: var(--color-text-light);
  font-size: 0.9rem;
}

.home-daily-meaning {
  margin-top: 0.35rem;
  font-size: 0.85rem;
  color: var(--color-text);
}

.home-daily-meta {
  margin-top: 0.55rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}

.home-reinforcement-card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 0.85rem;
  background: linear-gradient(180deg, #fff, #fbfbfb);
}

.home-reinforcement-card.is-empty {
  background: var(--color-bg);
}

.home-reinforcement-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-text);
}

.home-reinforcement-sub {
  margin-top: 0.2rem;
  font-size: 0.86rem;
  color: var(--color-text-light);
}

.home-reinforcement-note {
  margin-top: 0.35rem;
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.home-reinforcement-actions {
  margin-top: 0.55rem;
  display: flex;
  justify-content: flex-start;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.home-version {
  margin-top: 0.1rem;
  text-align: center;
  font-size: 0.72rem;
  color: var(--color-text-muted);
  letter-spacing: 0.03em;
}

.home-credit {
  margin-top: 0.35rem;
  padding-bottom: 0.4rem;
  text-align: center;
  font-size: 0.72rem;
  color: var(--color-text-muted);
}

#btn-home-reinforcement-why {
  min-width: 136px;
}

.home-list {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.home-empty {
  font-size: 0.88rem;
  color: var(--color-text-muted);
  padding: 0.35rem 0;
}

.home-history-item {
  width: 100%;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: #fff;
  padding: 0.6rem 0.7rem;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.18rem;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-align: left;
}

.home-history-item:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-sm);
}

.home-history-main {
  font-size: 1rem;
  color: var(--color-text);
  font-family: var(--font-japanese);
  line-height: 1.2;
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.home-history-sub {
  font-size: 0.78rem;
  color: var(--color-text-light);
}

.home-history-top {
  width: 100%;
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.45rem;
}

.home-mistake-lab {
  margin-bottom: 0.65rem;
}

.home-mistake-lab:empty {
  display: none;
}

.home-mistake-lab-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.home-mistake-lab-filter {
  min-height: 32px;
  padding: 0.3rem 0.6rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-bg);
  color: var(--color-text-light);
  font-size: 0.78rem;
  font-weight: 700;
  cursor: pointer;
}

.home-mistake-lab-filter.active {
  border-color: var(--color-primary);
  background: var(--color-primary-soft);
  color: var(--color-primary);
}

.home-mistake-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: #fff;
  padding: 0.6rem 0.7rem;
  display: flex;
  flex-direction: column;
  gap: 0.22rem;
}

.home-mistake-top {
  display: flex;
  justify-content: space-between;
  gap: 0.5rem;
  align-items: center;
}

.home-mistake-right {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.home-mistake-type {
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  background: #fff0ef;
  border: 1px solid #ffd7d4;
  color: var(--color-primary);
  border-radius: 999px;
  padding: 0.1rem 0.45rem;
  font-weight: 700;
}

.home-mistake-date {
  font-size: 0.72rem;
  color: var(--color-text-muted);
}

.home-mistake-delete-btn,
.home-history-delete-btn {
  width: 22px;
  height: 22px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  background: var(--color-card);
  color: var(--color-text-muted);
  line-height: 0;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.home-mistake-delete-btn svg,
.home-history-delete-btn svg {
  display: block;
  width: 10px;
  height: 10px;
  stroke: currentColor;
  fill: none;
  stroke-width: 1.8;
  stroke-linecap: round;
  pointer-events: none;
}

.home-mistake-delete-btn:hover,
.home-history-delete-btn:hover {
  border-color: var(--color-error);
  color: var(--color-error);
  background: var(--color-error-light);
}

.home-mistake-prompt {
  font-size: 1.05rem;
  font-family: var(--font-japanese);
  font-weight: 600;
  color: var(--color-text);
}

.home-mistake-sub {
  font-size: 0.77rem;
  color: var(--color-text-light);
}

.home-mistake-answers {
  margin-top: 0.15rem;
  display: flex;
  flex-direction: column;
  gap: 0.08rem;
}

.home-mistake-user {
  font-size: 0.78rem;
  color: var(--color-error);
}

.home-mistake-correct {
  font-size: 0.78rem;
  color: var(--color-success);
}

#btn-home-mistakes-toggle,
#btn-home-search-history-toggle {
  min-width: 96px;
}

#btn-home-mistakes-quiz {
  min-width: 72px;
}

.home-mistakes-modal-content {
  max-width: 560px;
  transform: translateZ(0);
}

.home-mistakes-quiz-modal-content {
  max-width: 560px;
}

.home-mistakes-quiz-section {
  margin-bottom: 1rem;
}

.home-mistakes-quiz-section h4 {
  margin-bottom: 0.55rem;
  font-size: 0.95rem;
  color: var(--color-text);
}

.home-mistakes-quiz-inline-note {
  margin-top: 0.15rem;
  margin-bottom: 0.2rem;
}

.home-reinforcement-why-modal-content {
  max-width: 560px;
}

.home-reinforcement-why-grid {
  margin-top: 0.8rem;
  display: grid;
  grid-template-columns: repeat(1, minmax(0, 1fr));
  gap: 0.55rem;
}

.home-reinforcement-why-row {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-card);
  padding: 0.65rem 0.75rem;
}

.home-reinforcement-why-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
}

.home-reinforcement-why-label {
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--color-text);
}

.home-reinforcement-why-count {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-primary);
}

.home-reinforcement-why-sub {
  margin-top: 0.15rem;
  font-size: 0.82rem;
  color: var(--color-text-light);
}

.home-reinforcement-why-foot {
  margin-top: 0.2rem;
  font-size: 0.74rem;
  color: var(--color-text-muted);
}

.home-reinforcement-why-meta {
  margin-top: 0.75rem;
}

.home-mistakes-modal-list {
  max-height: 60vh;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  overscroll-behavior: contain;
  contain: content;
  margin-top: 0.75rem;
  padding-right: 0.25rem;
}

#home-mistakes-modal,
#home-search-history-modal,
#home-mistakes-quiz-modal,
#home-reinforcement-why-modal {
  position: fixed;
  inset: 0;
  display: none;
  align-items: center;
  justify-content: center;
  backdrop-filter: none;
  background: rgba(0, 0, 0, 0.3);
}

#home-mistakes-modal.active,
#home-search-history-modal.active,
#home-mistakes-quiz-modal.active,
#home-reinforcement-why-modal.active {
  display: flex;
}

#home-mistakes-modal .home-mistakes-modal-content,
#home-search-history-modal .home-mistakes-modal-content,
#home-mistakes-quiz-modal .home-mistakes-quiz-modal-content,
#home-reinforcement-why-modal .home-reinforcement-why-modal-content {
  margin: 0;
}

/* === 7.1 Settings Screen === */
.settings-content {
  padding: 1.25rem;
}

.settings-card {
  background: var(--color-card);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  padding: 1rem;
}

.settings-card + .settings-card {
  margin-top: 1.25rem;
}

.settings-card h3 {
  margin-bottom: 0.45rem;
}

.settings-card p {
  font-size: 0.88rem;
  color: var(--color-text-light);
  margin-bottom: 0.85rem;
}

.settings-range-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.7rem;
  margin-bottom: 1rem;
}

.settings-range-chip-group {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.5rem;
}

.settings-range-chip {
  border: 1px solid var(--color-border);
  background: #fff;
  color: var(--color-text);
  border-radius: 999px;
  padding: 0.48rem 0.7rem;
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.settings-range-chip:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.settings-range-chip.active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
}

.settings-palette-group {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.5rem;
}

.settings-palette-option {
  border: 1px solid var(--color-border);
  background: #fff;
  color: var(--color-text);
  border-radius: var(--radius-sm);
  padding: 0.45rem 0.55rem;
  font-size: 0.82rem;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.settings-palette-option:hover {
  border-color: var(--color-primary);
}

.settings-palette-option.active {
  border-color: var(--color-primary);
  background: #fff5f5;
  color: var(--color-primary-dark);
}

.settings-palette-swatch {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  display: inline-block;
  border: 1px solid rgba(0, 0, 0, 0.12);
}

.settings-palette-swatch.classic { background: #c0392b; }
.settings-palette-swatch.ocean { background: #1e6bb8; }
.settings-palette-swatch.forest { background: #2f8f4f; }
.settings-palette-swatch.sunset { background: #d35400; }

.settings-stack {
  margin-bottom: 0.9rem;
}

.settings-help {
  margin-top: 0.45rem;
  margin-bottom: 0;
  font-size: 0.78rem;
  color: var(--color-text-muted);
}

.settings-credits {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.settings-credits-group h4 {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--color-text-light);
  text-transform: uppercase;
  letter-spacing: 0.03em;
  margin-bottom: 0.35rem;
}

.settings-credits-group ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.settings-credits-group li {
  font-size: 0.85rem;
  color: var(--color-text);
  line-height: 1.4;
}

.settings-credits-group a {
  color: var(--color-primary);
  font-weight: 600;
  text-decoration: none;
}

.settings-credits-group a:hover {
  text-decoration: underline;
}

.settings-field {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.settings-field span {
  font-size: 0.82rem;
  color: var(--color-text-light);
  font-weight: 600;
}

.settings-field select,
.settings-field input[type="email"],
.settings-field input[type="password"] {
  border: 1px solid var(--color-border);
  background: #fff;
  border-radius: var(--radius-sm);
  padding: 0.5rem 0.6rem;
  color: var(--color-text);
}

.settings-danger-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.settings-data-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 0.35rem;
}

.settings-storage-panel {
  display: grid;
  gap: 0.5rem;
  margin-top: 0.25rem;
}

.settings-storage-meter {
  width: 100%;
  height: 8px;
  overflow: hidden;
  border-radius: 999px;
  background: var(--color-border);
}

.settings-storage-meter span {
  display: block;
  width: 0;
  height: 100%;
  border-radius: inherit;
  background: var(--color-primary);
  transition: width var(--transition-fast, 0.15s);
}

.settings-storage-status {
  margin-top: 0;
}

.settings-field select:focus,
.settings-field input[type="email"]:focus,
.settings-field input[type="password"]:focus {
  outline: none;
  border-color: var(--color-primary);
}

.settings-cloud-auth {
  display: grid;
  gap: 0.5rem;
}

.account-cloud-auth input[type="email"],
.account-cloud-auth input[type="password"] {
  border: 1px solid var(--color-border);
  background: #fff;
  border-radius: var(--radius-sm);
  padding: 0.5rem 0.6rem;
  color: var(--color-text);
}

.account-cloud-auth input[type="email"]:focus,
.account-cloud-auth input[type="password"]:focus {
  outline: none;
  border-color: var(--color-primary);
}

:root[data-theme-mode="dark"] .account-cloud-auth input[type="email"],
:root[data-theme-mode="dark"] .account-cloud-auth input[type="password"] {
  background: var(--color-card);
  color: var(--color-text);
  border-color: var(--color-border);
}

.settings-sync-status {
  padding: 0.55rem 0.65rem;
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-sm);
  background: var(--color-bg);
}

.settings-sync-user {
  color: var(--color-text);
  font-size: 0.88rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  word-break: break-word;
}

.cloud-sync-conflict-options {
  display: grid;
  gap: 0.6rem;
  margin-top: 1rem;
}

.cloud-sync-conflict-details {
  display: grid;
  gap: 0.6rem;
  margin-top: 0.85rem;
}

.cloud-sync-conflict-card {
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-sm);
  background: var(--color-bg);
  padding: 0.7rem 0.8rem;
}

.cloud-sync-conflict-card h4 {
  font-size: 0.9rem;
  margin: 0 0 0.25rem;
  color: var(--color-text);
}

.cloud-sync-conflict-date {
  margin: 0;
  font-size: 0.84rem;
  color: var(--color-text-light);
}

.cloud-sync-conflict-summary {
  margin: 0.35rem 0 0;
  font-size: 0.78rem;
  color: var(--color-text-muted);
}

@media (min-width: 520px) {
  .cloud-sync-conflict-details {
    grid-template-columns: 1fr 1fr;
  }
}

.account-modal-content {
  max-width: 420px;
}

.account-cloud-auth,
.account-cloud-session {
  margin-top: 0.85rem;
}

.account-data-actions {
  align-items: center;
}

.settings-checkbox {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-size: 0.86rem;
  color: var(--color-text);
  cursor: pointer;
}

.settings-checkbox input[type="checkbox"] {
  width: 16px;
  height: 16px;
}

/* === 8. Study Screen === */
.group-tabs {
  display: flex;
  gap: 0.4rem;
  padding: 0.75rem 1.25rem;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
  background: var(--color-card);
  border-bottom: 1px solid var(--color-border-light);
}

.group-tabs::-webkit-scrollbar { display: none; }

.study-quiz-panel {
  padding: 0.75rem 1.25rem;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border-light);
}

.study-quiz-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.85rem;
  padding: 0.75rem 0.85rem;
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-sm);
  background: var(--color-card);
}

.study-quiz-main {
  min-width: 0;
}

.study-quiz-kicker {
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-primary);
}

.study-quiz-title {
  margin-top: 0.1rem;
  font-size: 0.98rem;
  font-weight: 700;
  color: var(--color-text);
}

.study-quiz-meta {
  margin-top: 0.12rem;
  font-size: 0.78rem;
  color: var(--color-text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.study-quiz-start {
  flex-shrink: 0;
}

.tab-btn {
  padding: 0.4rem 0.85rem;
  border: 1px solid var(--color-border);
  border-radius: 20px;
  background: transparent;
  color: var(--color-text-light);
  font-size: 0.8rem;
  font-weight: 500;
  cursor: pointer;
  white-space: nowrap;
  transition: all var(--transition-fast);
}

.tab-btn:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.tab-btn.active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
}

.char-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 0.6rem;
  padding: 1rem 1.25rem;
}

.char-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 0.75rem 0.25rem;
  background: var(--color-card);
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border-light);
  cursor: pointer;
  transition: all var(--transition-fast);
  position: relative;
}

.char-card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-sm);
  transform: translateY(-2px);
}

.char-card-char {
  font-family: var(--font-japanese);
  font-size: 1.8rem;
  line-height: 1.2;
  color: var(--color-text);
}

.char-card-romaji {
  font-size: 0.75rem;
  color: var(--color-text-light);
  margin-top: 0.15rem;
}

.char-card-mastery {
  font-size: 0.6rem;
  color: var(--color-text-muted);
  margin-top: 0.25rem;
}

.char-card.mastered {
  border-color: var(--color-success);
  background: var(--color-success-light);
}

/* === 9. Kanji Browse === */
.kanji-browse-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  height: calc(100vh - var(--header-height));
}

.kanji-list-panel {
  border-right: 1px solid var(--color-border-light);
  overflow-y: auto;
}

.kanji-list {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.5rem;
  padding: 0.75rem;
}

.kanji-list-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 0.6rem;
  background: var(--color-card);
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border-light);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.kanji-list-item:hover, .kanji-list-item.selected {
  border-color: var(--color-primary);
  background: #fff5f5;
}

.kanji-list-item .kanji-char {
  font-family: var(--font-japanese);
  font-size: 1.8rem;
  line-height: 1.2;
}

.kanji-list-item .kanji-meaning {
  font-size: 0.7rem;
  color: var(--color-text-light);
  margin-top: 0.2rem;
  text-align: center;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 100%;
}

.kanji-detail-panel {
  overflow-y: auto;
  padding: 1.25rem;
}

.kanji-detail-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100%;
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

.kanji-detail-char {
  font-family: var(--font-japanese);
  font-size: 5rem;
  text-align: center;
  color: var(--color-text);
  line-height: 1.2;
  margin-bottom: 0.75rem;
}

.kanji-detail-meanings {
  text-align: center;
  font-size: 1.1rem;
  color: var(--color-text);
  font-weight: 600;
  margin-bottom: 1rem;
}

.kanji-reading-row {
  display: flex;
  gap: 1rem;
  margin-bottom: 0.75rem;
}

.kanji-reading-box {
  flex: 1;
  background: var(--color-bg);
  border-radius: var(--radius-sm);
  padding: 0.6rem 0.75rem;
}

.kanji-reading-label {
  font-size: 0.7rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.2rem;
}

.kanji-reading-value {
  font-family: var(--font-japanese);
  font-size: 1rem;
  color: var(--color-text);
}

.kanji-reading-evidence {
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-sm);
  padding: 0.65rem 0.75rem;
  margin-bottom: 0.9rem;
  background: var(--color-bg);
}

.kanji-reading-evidence-title {
  font-size: 0.72rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.45rem;
  font-weight: 700;
}

.kanji-reading-evidence-list {
  display: flex;
  flex-direction: column;
  gap: 0.42rem;
}

.kanji-reading-evidence-row {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  flex-wrap: wrap;
}

.kanji-reading-evidence-reading {
  min-width: 3rem;
  color: var(--color-primary);
  font-weight: 700;
}

.kanji-reading-evidence-chips {
  display: flex;
  gap: 0.4rem;
  flex-wrap: wrap;
}

.kanji-reading-evidence-chip {
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  padding: 0.18rem 0.5rem;
  color: var(--color-text-light);
  font-size: 0.76rem;
  background: var(--color-card);
}

.kanji-reading-evidence-empty,
.related-words-status {
  color: var(--color-text-muted);
  font-size: 0.78rem;
}

.kanji-detail-meta {
  display: flex;
  gap: 0.75rem;
  margin-bottom: 1rem;
  flex-wrap: wrap;
}

.meta-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.3rem 0.6rem;
  background: var(--color-border-light);
  border-radius: 20px;
  font-size: 0.75rem;
  color: var(--color-text-light);
}

.kanji-detail-words h3 {
  font-size: 0.95rem;
  margin-bottom: 0;
  color: var(--color-text-light);
}

.related-words-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 0.6rem;
}

.related-words-status.loading {
  color: var(--color-text-muted);
}

.related-words-status.ready {
  color: var(--color-success);
}

.related-words-status.error {
  color: var(--color-warning);
}

.related-reading-tabs {
  display: flex;
  gap: 0.45rem;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  padding-bottom: 0.45rem;
  margin-bottom: 0.45rem;
}

.related-reading-tab {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  border: 1px solid var(--color-border);
  background: var(--color-card);
  color: var(--color-text-light);
  border-radius: 999px;
  padding: 0.26rem 0.62rem;
  font-family: var(--font-japanese);
  font-size: 0.86rem;
  cursor: pointer;
  white-space: nowrap;
  transition: all var(--transition-fast);
}

.related-reading-tab:hover {
  border-color: var(--color-primary-light);
}

.related-reading-tab.active {
  background: #fff2ef;
  color: var(--color-primary-dark);
  border-color: #efc2ba;
}

.related-reading-tab-count {
  font-family: var(--font-main);
  font-size: 0.72rem;
  color: var(--color-text-muted);
}

.related-words-list {
  display: flex;
  flex-direction: column;
}

.related-word-item {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 0.7rem;
  padding: 0.6rem 0;
  border-bottom: 1px solid var(--color-border-light);
}

.related-word-item:last-child {
  border-bottom: none;
}

.related-word-main {
  display: flex;
  flex-direction: column;
  gap: 0.08rem;
  min-width: 0;
}

.related-word-jp {
  font-family: var(--font-japanese);
  font-size: 1.05rem;
  line-height: 1.35;
}

.related-word-reading {
  font-size: 0.8rem;
  color: var(--color-text-light);
}

.related-word-meaning {
  font-size: 0.85rem;
  color: var(--color-text-light);
  text-align: right;
  max-width: 44%;
}

.related-word-hidden {
  display: none;
}

.word-ruby-token rt {
  font-size: 0.62em;
  color: #6b7986;
}

.word-ruby-token {
  ruby-align: center;
  ruby-position: over;
}

.kanji-focus {
  color: var(--color-primary);
  font-weight: 600;
}

.rt-focus,
.word-ruby-token rt.rt-focus {
  color: var(--color-primary) !important;
  font-weight: 600;
}

.example-word-focus {
  color: var(--color-primary);
  font-weight: 600;
}

.example-word-focus rt {
  color: var(--color-primary);
  font-weight: 600;
}

.example-sentence-token {
  margin-right: 0.03em;
}

.example-token-plain {
  display: inline-block;
}

.example-word-current {
  color: var(--color-primary);
  font-weight: 600;
}

.example-word-current rt {
  color: var(--color-primary) !important;
  font-weight: 600;
}

.example-word-clickable {
  color: var(--color-primary-light);
  text-decoration: underline;
  text-decoration-thickness: 0.07em;
  text-underline-offset: 0.12em;
  cursor: pointer;
}

.example-word-clickable rt {
  color: var(--color-primary-light) !important;
  font-weight: 500;
}

.example-word-clickable:hover,
.example-word-clickable:focus-visible {
  color: var(--color-primary);
}

.example-word-clickable:hover rt,
.example-word-clickable:focus-visible rt {
  color: var(--color-primary) !important;
}

.kanji-detail-actions {
  display: flex;
  gap: 0.5rem;
  margin-top: 1rem;
}

/* === 10. Words Screen === */
.words-toolbar {
  padding: 0.75rem 1.25rem;
  background: var(--color-card);
  border-bottom: 1px solid var(--color-border-light);
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.search-box {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 0.5rem 0.75rem;
  transition: border-color var(--transition-fast);
}

.search-box:focus-within {
  border-color: var(--color-primary);
}

.search-box svg {
  color: var(--color-text-muted);
  flex-shrink: 0;
}

.search-box input {
  border: none;
  background: transparent;
  outline: none;
  width: 100%;
  font-size: 0.9rem;
  color: var(--color-text);
}

.search-box input::placeholder {
  color: var(--color-text-muted);
}

.words-filters {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.words-filters select {
  padding: 0.4rem 0.6rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-card);
  color: var(--color-text);
  font-size: 0.8rem;
  cursor: pointer;
  outline: none;
}

.words-filters select:focus {
  border-color: var(--color-primary);
}

.words-list {
  padding: 0.75rem 1.25rem;
}

.word-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.85rem 1rem;
  background: var(--color-card);
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border-light);
  margin-bottom: 0.5rem;
  transition: all var(--transition-fast);
}

.word-card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-sm);
}

.word-card-left {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

.word-jp {
  font-family: var(--font-japanese);
  font-size: 1.15rem;
  color: var(--color-text);
}

.word-reading {
  font-family: var(--font-japanese);
  font-size: 0.8rem;
  color: var(--color-text-light);
}

.word-card-right {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.word-meaning {
  font-size: 0.9rem;
  color: var(--color-text);
  text-align: right;
}

.word-meta {
  display: flex;
  gap: 0.3rem;
}

.words-pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 0.5rem;
  padding: 1rem;
}

.words-pagination button {
  padding: 0.4rem 0.75rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-card);
  cursor: pointer;
  font-size: 0.85rem;
  transition: all var(--transition-fast);
}

.words-pagination button:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.words-pagination button.active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
}

/* === 11. Groups Screen === */
.groups-header-actions {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
}

.groups-type-tabs {
  display: flex;
  background: var(--color-card);
  border-bottom: 1px solid var(--color-border-light);
}

.groups-type-tabs .tab-btn {
  flex: 1;
  border: none;
  border-radius: 0;
  padding: 0.75rem;
  font-size: 0.9rem;
  border-bottom: 2px solid transparent;
}

.groups-type-tabs .tab-btn.active {
  background: transparent;
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

.groups-list {
  padding: 1rem 1.25rem;
}

.groups-section {
  margin-bottom: 1rem;
}

.groups-section-toggle {
  width: 100%;
  border: none;
  background: transparent;
  display: flex;
  align-items: center;
  gap: 0.45rem;
  text-align: left;
  padding: 0.15rem 0;
  cursor: pointer;
}

.groups-section-arrow {
  width: 14px;
  font-size: 0.72rem;
  color: var(--color-text-muted);
  flex-shrink: 0;
}

.groups-section-title {
  font-size: 0.95rem;
  color: var(--color-text-light);
  font-weight: 600;
  flex: 1;
}

.groups-section-meta {
  font-size: 0.78rem;
  color: var(--color-text-muted);
}

.groups-section-body {
  margin-top: 0.55rem;
}

.preset-folder {
  background: var(--color-card);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius);
  margin-bottom: 0.55rem;
}

.preset-folder-header {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.45rem 0.55rem 0.4rem;
}

.preset-folder-check {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 18px;
  flex-shrink: 0;
}

.preset-folder-check input {
  width: 15px;
  height: 15px;
  accent-color: var(--color-primary);
  cursor: pointer;
}

.preset-folder-toggle {
  flex: 1;
  border: none;
  background: transparent;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.2rem;
  cursor: pointer;
  text-align: left;
}

.preset-folder-arrow {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  width: 14px;
  flex-shrink: 0;
}

.preset-folder-title {
  font-weight: 600;
  color: var(--color-text);
  flex: 1;
}

.preset-folder-meta {
  color: var(--color-text-muted);
  font-size: 0.8rem;
}

.preset-folder-body {
  padding: 0.2rem 0.55rem 0.55rem;
}

.preset-folder-body .preset-parent-card:last-child {
  margin-bottom: 0;
}

.preset-parent-card {
  background: var(--color-card);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius);
  margin-bottom: 0.55rem;
}

.preset-parent-header {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.45rem 0.55rem 0.4rem;
}

.preset-parent-check {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 18px;
  flex-shrink: 0;
}

.preset-parent-check input {
  width: 15px;
  height: 15px;
  accent-color: var(--color-primary);
  cursor: pointer;
}

.preset-parent-toggle {
  flex: 1;
  border: none;
  background: transparent;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.2rem;
  cursor: pointer;
  text-align: left;
}

.preset-parent-arrow {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  width: 14px;
  flex-shrink: 0;
}

.preset-parent-title {
  font-weight: 600;
  color: var(--color-text);
  flex: 1;
}

.preset-parent-meta {
  color: var(--color-text-muted);
  font-size: 0.8rem;
}

.preset-parent-actions {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.preset-parent-actions .btn-sm,
.preset-child-actions .btn-sm {
  padding: 0.25rem 0.5rem;
  font-size: 0.7rem;
}

.preset-child-list {
  padding: 0.2rem 0.55rem 0.55rem;
}

.preset-child-list .group-card {
  margin-bottom: 0.45rem;
}

.preset-child-list .group-card:last-child {
  margin-bottom: 0;
}

.group-folder-empty {
  padding: 0.5rem 0.4rem;
  font-size: 0.82rem;
  color: var(--color-text-muted);
}

.preset-child-row {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.55rem 0.55rem;
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-sm);
  margin-top: 0.45rem;
  background: #fff;
  cursor: pointer;
}

.preset-child-row.selected {
  border-color: var(--color-primary);
  background: #fff5f5;
}

.preset-child-check {
  display: inline-flex;
  align-items: center;
  margin-right: 0.15rem;
}

.preset-child-check input {
  width: 15px;
  height: 15px;
  accent-color: var(--color-primary);
  cursor: pointer;
}

.preset-child-info {
  flex: 1;
}

.preset-child-name {
  font-size: 0.88rem;
  font-weight: 600;
}

.preset-child-meta {
  font-size: 0.75rem;
  color: var(--color-text-muted);
}

.preset-child-actions {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.group-card {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem;
  background: var(--color-card);
  border-radius: var(--radius);
  border: 1px solid var(--color-border-light);
  margin-bottom: 0.6rem;
  transition: all var(--transition-fast);
  cursor: pointer;
}

.group-card:hover {
  border-color: var(--color-border);
  box-shadow: var(--shadow-sm);
}

.group-card.selected {
  border-color: var(--color-primary);
  background: #fff5f5;
}

.group-card-check {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 18px;
  flex-shrink: 0;
}

.group-card-check input {
  width: 15px;
  height: 15px;
  accent-color: var(--color-primary);
  cursor: pointer;
}

.group-color-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  flex-shrink: 0;
}

.group-card-info {
  flex: 1;
}

.group-card-info h3 {
  font-size: 0.95rem;
  margin-bottom: 0.1rem;
}

.group-card-info p {
  font-size: 0.8rem;
  color: var(--color-text-light);
}

.group-card-actions {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.group-action-menu-wrap {
  position: relative;
}

.group-action-menu-trigger {
  min-width: 34px;
  padding: 0.3rem 0.45rem;
  line-height: 1;
}

.group-action-menu {
  position: absolute;
  right: 0;
  top: calc(100% + 4px);
  min-width: 132px;
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-md);
  display: none;
  flex-direction: column;
  overflow: hidden;
  z-index: 25;
}

.group-action-menu-wrap.open .group-action-menu {
  display: flex;
}

.group-action-menu-item {
  border: none;
  background: transparent;
  text-align: left;
  padding: 0.45rem 0.6rem;
  font-size: 0.82rem;
  cursor: pointer;
  color: var(--color-text);
}

.group-action-menu-item:hover {
  background: var(--color-border-light);
}

.group-action-menu-item.danger {
  color: var(--color-error);
}

.group-empty-state {
  text-align: center;
  padding: 3rem 1rem;
  color: var(--color-text-muted);
}

.group-empty-state p {
  margin-bottom: 1rem;
}

.group-quiz-modal-content {
  max-width: 560px;
}

.group-quiz-summary {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  margin-bottom: 0.9rem;
}

#group-quiz-selected-count {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--color-text-light);
}

#group-quiz-selected-list {
  color: var(--color-text-muted);
  line-height: 1.4;
}

.group-quiz-section {
  margin-bottom: 1rem;
}

.group-quiz-section h4 {
  margin-bottom: 0.55rem;
  font-size: 0.95rem;
  color: var(--color-text);
}

#group-quiz-types {
  min-height: 2rem;
}

.group-quiz-inline-note {
  margin-top: 0.15rem;
  margin-bottom: 0.2rem;
}

.group-quiz-custom-count {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(6rem, 9rem);
  align-items: center;
  gap: 0.5rem 0.75rem;
  margin-top: 0.75rem;
  color: var(--color-text);
  font-size: 0.9rem;
  font-weight: 600;
}

.group-quiz-custom-count input {
  width: 100%;
  min-width: 0;
  padding: 0.65rem 0.75rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-card);
  color: var(--color-text);
  font: inherit;
}

.group-quiz-custom-count input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-soft);
}

.group-quiz-custom-count small {
  grid-column: 1 / -1;
  color: var(--color-text-muted);
  font-size: 0.78rem;
  font-weight: 400;
}

.radio-card.is-disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.radio-card.is-disabled .radio-card-content {
  pointer-events: none;
}

.group-flashcards-header-main {
  flex: 1;
  min-width: 0;
}

#screen-group-flashcards {
  padding-bottom: 0;
}

.group-flashcards-header-main .screen-title {
  font-size: 1.15rem;
  margin-bottom: 0.05rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.group-flashcards-progress {
  font-size: 0.78rem;
  color: var(--color-text-muted);
  line-height: 1.2;
}

.group-flashcards-status {
  font-size: 0.72rem;
  color: var(--color-text-light);
  line-height: 1.2;
  margin-top: 0.05rem;
}

.group-flashcards-type {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--color-primary);
  background: var(--color-primary-soft);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  padding: 0.25rem 0.6rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  flex-shrink: 0;
}

.group-flashcards-layout {
  display: flex;
  align-items: center;
  gap: 0.9rem;
  padding: 1rem 1.25rem 1.3rem;
  min-height: calc(100vh - var(--header-height) - 1.2rem);
  height: calc(100vh - var(--header-height) - 1.2rem);
  overflow: hidden;
}

.group-flashcard-nav {
  width: 50px;
  min-width: 50px;
  height: 50px;
  border-radius: 999px;
  font-size: 1.35rem;
  padding: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  align-self: center;
}

.group-flashcard-stage {
  flex: 1;
  min-width: 0;
  min-height: 0;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: stretch;
  gap: 0.65rem;
}

.group-flashcard-card-wrap {
  width: min(100%, 760px);
  flex: 1;
  min-height: 0;
  max-height: 100%;
  position: relative;
  display: flex;
}

.group-flashcard-card {
  width: 100%;
  flex: 1;
  min-height: 0;
  max-height: 100%;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  background: var(--color-card);
  box-shadow: var(--shadow-md);
  position: relative;
  overflow: hidden;
  cursor: pointer;
  color: inherit;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast), transform var(--transition-fast);
}

.group-flashcard-detail-btn {
  position: absolute;
  top: 0.8rem;
  left: 0.8rem;
  z-index: 4;
  width: 2.35rem;
  height: 2.35rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  border: 1px solid var(--color-border);
  background: color-mix(in srgb, var(--color-card) 88%, transparent);
  color: var(--color-text-light);
  box-shadow: var(--shadow-sm);
  cursor: pointer;
  font-size: 1rem;
  line-height: 1;
  transition: border-color var(--transition-fast), background-color var(--transition-fast), color var(--transition-fast), transform var(--transition-fast);
}

.group-flashcard-detail-btn:hover,
.group-flashcard-detail-btn:focus-visible {
  border-color: var(--color-primary);
  background: var(--color-primary-soft);
  color: var(--color-primary);
  outline: none;
  transform: translateY(-1px);
}

.group-flashcard-detail-btn[hidden] {
  display: none;
}

.group-flashcard-card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-lg);
  transform: translateY(-1px);
}

.group-flashcard-card:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

.group-flashcard-face {
  position: absolute;
  inset: 0;
  padding: 1rem 1.1rem;
  overflow-y: auto;
  transition: opacity var(--transition), visibility var(--transition);
}

.group-flashcard-card.group-flashcard-no-anim .group-flashcard-face {
  transition: none;
}

.group-flashcard-front {
  opacity: 1;
  visibility: visible;
}

.group-flashcard-back {
  opacity: 0;
  visibility: hidden;
}

.group-flashcard-card.is-flipped .group-flashcard-front {
  opacity: 0;
  visibility: hidden;
}

.group-flashcard-card.is-flipped .group-flashcard-back {
  opacity: 1;
  visibility: visible;
}

.group-flashcard-kanji-front,
.group-flashcard-word-front {
  min-height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
}

.group-flashcard-kanji-char {
  font-size: clamp(4.5rem, 13vw, 8rem);
  line-height: 1;
  margin-bottom: 0.75rem;
}

.group-flashcard-kanji-reading,
.group-flashcard-word-reading {
  font-size: 1.35rem;
  color: var(--color-text-light);
  margin-bottom: 0.5rem;
}

.group-flashcard-kanji-readings {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  margin-bottom: 0.5rem;
  max-width: min(100%, 700px);
}

.group-flashcard-reading-line {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  gap: 0.45rem;
  flex-wrap: wrap;
}

.group-flashcard-reading-label {
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--color-text-muted);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding-top: 0.18rem;
}

.group-flashcard-reading-line .group-flashcard-kanji-reading {
  font-size: 1.02rem;
  line-height: 1.35;
  margin-bottom: 0;
  white-space: normal;
}

.group-flashcard-reading-token {
  display: inline;
}

.group-flashcard-reading-sep {
  color: var(--color-text-muted);
}

.group-flashcard-kanji-meaning {
  font-size: 1.2rem;
  color: var(--color-text);
}

.group-flashcard-word-jp {
  font-size: clamp(2.5rem, 8vw, 4.1rem);
  line-height: 1.2;
  margin-bottom: 0.45rem;
}

.group-flashcard-back-title {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--color-text-light);
  text-transform: uppercase;
  letter-spacing: 0.03em;
  margin-bottom: 0.6rem;
}

.group-flashcard-back-title:not(:first-child) {
  margin-top: 1.1rem;
}

.group-flashcard-kanji-back-meaning {
  font-size: 1.5rem;
  line-height: 1.3;
  color: var(--color-text);
  text-align: center;
}

.group-flashcard-word-meaning {
  font-size: 1.15rem;
  line-height: 1.4;
  color: var(--color-text);
}

.group-flashcard-kanji-back-layout {
  min-height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.95rem;
  text-align: center;
  transition: justify-content var(--transition);
}

.group-flashcard-kanji-back-layout.is-expanded {
  justify-content: flex-start;
  padding-top: clamp(0.8rem, 5vh, 2.4rem);
}

.group-flashcard-back-meaning-panel {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  max-width: min(100%, 760px);
  transition: transform var(--transition), opacity var(--transition);
}

.group-flashcard-kanji-back-layout.is-expanded .group-flashcard-back-meaning-panel {
  transform: translateY(-0.4rem);
}

.group-flashcard-empty-inline {
  color: var(--color-text-muted);
  font-style: italic;
}

.group-flashcard-related-list[hidden],
.group-flashcard-example-list[hidden] {
  display: none;
}

.group-flashcard-list-toggle {
  display: inline-block;
  margin-top: 1rem;
  padding: 0.5rem 1rem;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  background: var(--color-card);
  color: var(--color-primary);
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  transition: border-color var(--transition-fast), background-color var(--transition-fast);
}

.group-flashcard-list-toggle:hover,
.group-flashcard-list-toggle:focus-visible {
  border-color: var(--color-primary);
  background: var(--color-primary-soft);
  outline: none;
}

.group-flashcard-list-toggle[aria-expanded="true"] {
  margin-bottom: 0.7rem;
}

.group-flashcard-related-list,
.group-flashcard-example-list {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.group-flashcard-related-list {
  max-width: min(100%, 860px);
  margin: 0 auto;
}

.group-flashcard-related-list-animated {
  width: 100%;
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  pointer-events: none;
  transform: translateY(0.7rem);
  transition: max-height var(--transition), opacity var(--transition), transform var(--transition);
}

.group-flashcard-kanji-back-layout.is-expanded .group-flashcard-related-list-animated {
  max-height: min(52vh, 480px);
  opacity: 1;
  overflow-y: auto;
  pointer-events: auto;
  transform: translateY(0);
}

.group-flashcard-related-item {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(140px, 34%);
  align-items: center;
  gap: 0.8rem;
  padding: 0.65rem 0.7rem;
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-sm);
  background: var(--color-card);
  cursor: pointer;
  transition: border-color var(--transition-fast), background-color var(--transition-fast);
}

.group-flashcard-related-item:hover,
.group-flashcard-related-item:focus-visible {
  border-color: var(--color-primary);
  background: var(--color-primary-soft);
  outline: none;
}

.group-flashcard-related-main {
  min-width: 0;
  flex: 1;
  text-align: left;
}

.group-flashcard-related-jp {
  font-size: 1.06rem;
  line-height: 1.25;
  text-align: left;
}

.group-flashcard-related-reading {
  margin-top: 0.1rem;
  font-size: 0.83rem;
  color: var(--color-text-light);
  text-align: left;
}

.group-flashcard-related-meaning {
  font-size: 0.82rem;
  color: var(--color-text-light);
  max-width: 38%;
  text-align: right;
  align-self: center;
}

.group-flashcard-example-item {
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-sm);
  padding: 0.65rem 0.7rem;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.group-flashcard-example-head,
.example-sentence-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 0.45rem;
  align-items: start;
}

.group-flashcard-example-actions,
.example-sentence-actions {
  display: inline-flex;
  justify-content: flex-end;
  align-items: flex-start;
}

.sentence-bookmark-btn {
  width: 28px;
  height: 28px;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  background: var(--color-card);
  color: var(--color-text-muted);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
  font-size: 0.95rem;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.sentence-bookmark-btn:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: var(--color-primary-soft);
}

.sentence-bookmark-btn.active {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: var(--color-primary-soft);
}

.group-flashcard-example-jp {
  font-size: 1rem;
  line-height: 1.5;
  margin-bottom: 0.2rem;
  min-width: 0;
}

.group-flashcard-example-en {
  font-size: 0.84rem;
  color: var(--color-text-light);
}

.group-flashcard-example-source {
  margin-top: 0.14rem;
  font-size: 0.73rem;
  color: var(--color-text-muted);
}

.group-flashcard-empty {
  min-height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: var(--color-text-muted);
  font-size: 0.92rem;
  padding: 1rem;
}

.group-flashcard-hint {
  color: var(--color-text-muted);
  font-size: 0.8rem;
  text-align: center;
  margin: 0;
}

.group-flashcard-rating {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.45rem;
  width: min(100%, 760px);
}

.group-flashcard-rating .btn {
  min-width: 92px;
  justify-content: center;
}

.group-flashcard-rating .btn.active {
  border-color: var(--color-success, var(--color-primary));
  background: var(--color-success-soft, var(--color-primary-soft));
  color: var(--color-success, var(--color-primary));
}

/* === 12. Quiz Setup === */
.quiz-setup-content {
  padding: 1.25rem;
}

.setup-section {
  margin-bottom: 1.5rem;
}

.setup-section.is-disabled {
  opacity: 0.58;
}

.setup-section.is-disabled .radio-card {
  cursor: not-allowed;
}

.setup-section.is-disabled .radio-card-content {
  pointer-events: none;
}

.setup-section h3 {
  margin-bottom: 0.6rem;
  color: var(--color-text);
}

.quiz-chain-template-card {
  border: 1px solid var(--color-border-light);
  background: var(--color-card);
  border-radius: var(--radius-sm);
  padding: 0.7rem 0.8rem;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.quiz-chain-template-card p {
  margin: 0;
}

.setup-options {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.radio-card {
  cursor: pointer;
}

.radio-card input {
  display: none;
}

.radio-card-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.25rem;
  padding: 0.7rem 1rem;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  font-weight: 500;
  font-size: 0.85rem;
  min-width: 80px;
  text-align: center;
}

.radio-card input:checked + .radio-card-content {
  border-color: var(--color-primary);
  background: #fff5f5;
  color: var(--color-primary);
}

.radio-card:hover .radio-card-content {
  border-color: var(--color-primary-light);
}

.radio-card.compact .radio-card-content {
  min-width: 50px;
  padding: 0.5rem 0.75rem;
}

.radio-icon {
  font-family: var(--font-japanese);
  font-size: 1.5rem;
}

.radio-card-content small {
  font-size: 0.7rem;
  color: var(--color-text-light);
}

.checkbox-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.checkbox-card {
  cursor: pointer;
}

.checkbox-card input {
  display: none;
}

.checkbox-card-content {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.45rem 0.75rem;
  border: 1px solid var(--color-border);
  border-radius: 20px;
  font-size: 0.8rem;
  transition: all var(--transition-fast);
}

.checkbox-card input:checked + .checkbox-card-content {
  border-color: var(--color-primary);
  background: var(--color-primary);
  color: #fff;
}

.checkbox-card:hover .checkbox-card-content {
  border-color: var(--color-primary);
}

.group-checkbox-list {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.group-checkbox-list .groups-section:last-child {
  margin-bottom: 0;
}

.quiz-group-selection-note {
  color: var(--color-text-muted);
  font-size: 0.82rem;
  margin-bottom: 0.55rem;
}

.group-checkbox-item {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.6rem 0.75rem;
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.group-checkbox-item:hover {
  border-color: var(--color-primary);
}

.group-checkbox-item.selected {
  border-color: var(--color-primary);
  background: #fff5f5;
}

/* === 13. Quiz Screen === */
.quiz-header {
  display: grid;
  grid-template-columns: 1fr auto;
  grid-template-areas:
    "info actions"
    "chain chain"
    "progress progress";
  align-items: center;
  padding: 0.75rem 1.25rem;
  background: var(--color-card);
  border-bottom: 1px solid var(--color-border-light);
  position: sticky;
  top: 0;
  z-index: 100;
  column-gap: 0.5rem;
  row-gap: 0.5rem;
}

.quiz-chain-progress {
  grid-area: chain;
  font-size: 0.78rem;
  color: var(--color-text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.quiz-info {
  grid-area: info;
  display: flex;
  justify-content: space-between;
  width: auto;
  min-width: 0;
  gap: 0.75rem;
  font-size: 0.85rem;
  color: var(--color-text-light);
  font-weight: 500;
}

.quiz-header-actions {
  grid-area: actions;
  display: inline-flex;
  align-items: center;
  justify-content: flex-end;
  gap: 0.45rem;
}

.quiz-dont-know-header {
  border: 1px dashed var(--color-primary);
  color: var(--color-primary);
  background: var(--color-primary-soft);
  font-weight: 700;
}

.quiz-dont-know-header:hover {
  background: var(--color-primary-soft);
  border-color: var(--color-primary-dark);
}

.quiz-progress-bar {
  grid-area: progress;
  width: 100%;
  height: 4px;
  background: var(--color-border-light);
  border-radius: 2px;
  overflow: hidden;
}

#quiz-question-num {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

#quiz-score {
  margin-left: auto;
  white-space: nowrap;
  flex-shrink: 0;
}

.quiz-progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--color-primary), var(--color-primary-light));
  border-radius: 2px;
  width: 0%;
  transition: width 0.4s ease;
}

.quiz-quit {
  position: static;
  align-self: center;
}

.quiz-body {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 2rem 1.25rem;
  min-height: calc(100vh - 80px);
}

.quiz-prompt {
  text-align: center;
  margin-bottom: 2rem;
}

.quiz-prompt-label {
  font-size: 0.85rem;
  color: var(--color-text-light);
  margin-bottom: 0.5rem;
}

.quiz-prompt-char {
  font-family: var(--font-japanese);
  font-size: 5rem;
  line-height: 1.2;
  color: var(--color-text);
  padding: 1.5rem 2.5rem;
  background: var(--color-card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--color-border-light);
  display: inline-block;
  transition: all var(--transition);
}

.quiz-prompt-sub {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-top: 0.5rem;
}

.quiz-answers {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.6rem;
  width: 100%;
  max-width: 500px;
}

.quiz-answer-btn {
  padding: 0.85rem 1rem;
  border: 2px solid var(--color-border);
  border-radius: var(--radius);
  background: linear-gradient(180deg, var(--color-card) 0%, var(--color-primary-soft) 180%);
  color: var(--color-text);
  font-size: 1rem;
  cursor: pointer;
  transition: all var(--transition-fast);
  font-family: var(--font-main);
  text-align: center;
  box-shadow: 0 0 0 0 rgba(0, 0, 0, 0);
}

.quiz-answer-btn.japanese {
  font-family: var(--font-japanese);
  font-size: 1.3rem;
}

.quiz-answer-btn:hover {
  border-color: var(--color-primary);
  background: linear-gradient(180deg, var(--color-card) 0%, var(--color-primary-soft) 100%);
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.08);
  transform: translateY(-1px);
}

.quiz-answer-btn:focus-visible {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-soft);
}

.quiz-answer-btn.correct {
  border-color: var(--color-success);
  background: var(--color-success-light);
  color: var(--color-success);
  animation: correctPulse 0.4s ease;
}

.quiz-answer-btn.wrong {
  border-color: var(--color-error);
  background: var(--color-error-light);
  color: var(--color-error);
  animation: shake 0.4s ease;
}

.quiz-answer-btn.disabled {
  pointer-events: none;
  opacity: 0.5;
}

.quiz-answer-btn.highlight {
  border-color: var(--color-success);
  background: var(--color-success-light);
  color: var(--color-success);
}

.quiz-answer-reveal {
  grid-column: 1 / -1;
  position: relative;
  margin-top: 0.25rem;
  padding: 0.95rem 3rem 0.95rem 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-card);
  color: var(--color-text);
  box-shadow: var(--shadow-sm);
}

.quiz-answer-reveal.is-correct {
  border-color: rgba(39, 174, 96, 0.35);
}

.quiz-answer-reveal.is-review {
  border-color: rgba(192, 57, 43, 0.35);
}

.quiz-answer-reveal-head {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.quiz-answer-reveal-status {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-weight: 800;
  color: var(--color-primary);
}

.quiz-answer-reveal.is-correct .quiz-answer-reveal-status {
  color: var(--color-success);
}

.quiz-answer-reveal-type {
  color: var(--color-text-muted);
  font-size: 0.78rem;
}

.quiz-answer-reveal-word-block {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-top: 0.45rem;
}

.quiz-answer-reveal-word {
  font-size: 1.4rem;
  font-weight: 700;
}

.quiz-answer-reveal-reading {
  font-size: 1rem;
  color: var(--color-text-light);
}

.quiz-answer-reveal-romaji {
  margin-top: 0.25rem;
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

.quiz-answer-reveal-meaning {
  margin-top: 0.4rem;
  line-height: 1.4;
}

.quiz-answer-reveal-facts {
  display: grid;
  gap: 0.35rem;
  margin-top: 0.65rem;
}

.quiz-answer-reveal-fact {
  display: grid;
  grid-template-columns: 72px minmax(0, 1fr);
  gap: 0.55rem;
  align-items: baseline;
}

.quiz-answer-reveal-fact-label {
  color: var(--color-text-muted);
  font-size: 0.78rem;
  font-weight: 700;
}

.quiz-answer-reveal-fact-value {
  color: var(--color-text);
  min-width: 0;
  overflow-wrap: anywhere;
}

.quiz-answer-reveal-grammar {
  margin-top: 0.75rem;
  padding-top: 0.7rem;
  border-top: 1px solid var(--color-border);
}

.quiz-answer-reveal-grammar-title {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--color-text);
  font-size: 0.86rem;
  font-weight: 800;
}

.quiz-answer-reveal-grammar-confidence {
  color: var(--color-text-muted);
  font-size: 0.72rem;
  font-weight: 600;
}

.quiz-answer-reveal-grammar-note {
  margin-top: 0.25rem;
  color: var(--color-text-muted);
  font-size: 0.8rem;
}

.quiz-answer-reveal-grammar-forms {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-top: 0.45rem;
}

.quiz-answer-reveal-grammar-form {
  padding: 0.22rem 0.45rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-bg);
  color: var(--color-text);
  font-size: 0.82rem;
}

.quiz-answer-reveal-example {
  margin-top: 0.7rem;
  padding-top: 0.65rem;
  border-top: 1px solid var(--color-border);
}

.quiz-answer-reveal-example-jp {
  color: var(--color-text);
  line-height: 1.5;
}

.quiz-answer-reveal-example-en {
  color: var(--color-text-light);
  font-size: 0.86rem;
  line-height: 1.4;
  margin-top: 0.25rem;
}

.quiz-answer-reveal-audio {
  position: absolute;
  top: 0.75rem;
  right: 0.75rem;
  width: 2rem;
  height: 2rem;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  background: var(--color-primary-soft);
  color: var(--color-text);
  cursor: pointer;
}

.quiz-tap-hint {
  margin-top: 1rem;
  font-size: 0.95rem;
  color: var(--color-text-light);
  font-weight: 600;
  text-align: center;
}

/* Quiz Writing Mode */
.quiz-writing-input {
  /* Block + auto margins center the field within the answers container
     (which is itself centered, capped at 500px); max-width keeps it from
     stretching edge to edge on wide screens. */
  display: block;
  width: 100%;
  max-width: 480px;
  margin: 0 auto;
  padding: 1.1rem;
  border: 2px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 1.25rem;
  text-align: center;
  outline: none;
  transition: border-color var(--transition-fast);
}

.quiz-writing-input:focus {
  border-color: var(--color-primary);
}

.quiz-writing-submit {
  display: block;
  width: 100%;
  max-width: 480px;
  margin: 0.75rem auto 0;
}

/* Quiz Feedback */
.quiz-feedback {
  text-align: center;
  margin-top: 1.5rem;
  animation: fadeSlideIn 0.3s ease;
}

.quiz-feedback.hidden {
  display: none;
}

.feedback-icon {
  font-size: 2.5rem;
  margin-bottom: 0.5rem;
}

.feedback-icon.correct {
  color: var(--color-success);
}

.feedback-icon.wrong {
  color: var(--color-error);
}

.feedback-text {
  font-size: 1rem;
  color: var(--color-text);
  margin-bottom: 1rem;
}

@keyframes correctPulse {
  0% { transform: scale(1); }
  50% { transform: scale(1.05); }
  100% { transform: scale(1); }
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  20% { transform: translateX(-6px); }
  40% { transform: translateX(6px); }
  60% { transform: translateX(-4px); }
  80% { transform: translateX(4px); }
}

/* === 14. Quiz Results === */
.results-content {
  padding: 2rem 1.25rem;
  text-align: center;
}

.results-header h2 {
  font-size: 1.4rem;
  margin-bottom: 1rem;
  color: var(--color-text);
}

.results-score {
  font-size: 3rem;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.2;
}

.results-percentage {
  font-size: 1.3rem;
  color: var(--color-text-light);
  margin-bottom: 1rem;
}

.results-points {
  font-size: 1rem;
  color: var(--color-accent);
  font-weight: 600;
  margin-bottom: 1.5rem;
}

.results-bar-chart {
  display: block;
  margin-bottom: 1.5rem;
}

.results-metrics {
  width: min(460px, 100%);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}

.results-metric-row {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.results-metric-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.75rem;
}

.results-metric-label {
  font-size: 0.85rem;
  font-weight: 600;
}

.results-metric-label.correct {
  color: var(--color-success);
}

.results-metric-label.wrong {
  color: var(--color-error);
}

.results-metric-value {
  font-size: 0.8rem;
  color: var(--color-text-light);
  font-weight: 600;
}

.results-metric-track {
  width: 100%;
  height: 12px;
  background: var(--color-border-light);
  border-radius: 999px;
  overflow: hidden;
}

.results-metric-fill {
  height: 100%;
  border-radius: 999px;
  transition: width 0.45s ease;
}

.results-metric-fill.correct {
  background: var(--color-success);
}

.results-metric-fill.wrong {
  background: var(--color-error);
}

.results-mistakes {
  text-align: left;
  margin-bottom: 1.5rem;
}

.results-mistakes h3 {
  margin-bottom: 0.75rem;
}

.mistake-item {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 0.35rem;
  padding: 0.6rem 0.75rem;
  background: var(--color-error-light);
  border-radius: var(--radius-sm);
  margin-bottom: 0.4rem;
  font-size: 0.9rem;
}

.mistake-item-clickable {
  cursor: pointer;
  transition: border-color 0.15s ease, transform 0.15s ease;
}

.mistake-item-clickable:hover {
  border-color: var(--color-primary);
  transform: translateY(-1px);
}

.mistake-item-clickable:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

.mistake-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.mistake-type {
  background: var(--color-primary);
  color: #fff;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  border-radius: 999px;
  padding: 0.2rem 0.45rem;
}

.mistake-prompt-label {
  font-size: 0.75rem;
  color: var(--color-text-light);
}

.mistake-main {
  display: flex;
  flex-direction: column;
  gap: 0.12rem;
}

.mistake-prompt {
  font-weight: 600;
  font-family: var(--font-japanese);
}

.mistake-prompt-sub {
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.mistake-answers {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.6rem;
  flex-wrap: wrap;
  font-size: 0.82rem;
}

.mistake-user-answer {
  color: var(--color-error);
}

.mistake-correct {
  color: var(--color-success);
  font-weight: 600;
}

.results-actions {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

/* === 15. Progress Screen === */
.progress-content {
  padding: 1.25rem;
}

.progress-overview {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

.overview-card {
  background: var(--color-card);
  border-radius: var(--radius);
  padding: 1rem;
  text-align: center;
  border: 1px solid var(--color-border-light);
}

.overview-card .stat-value {
  font-size: 1.75rem;
}

.overview-card .stat-label {
  font-size: 0.78rem;
  color: var(--color-text-light);
}

.progress-categories {
  margin-bottom: 1.5rem;
}

.progress-categories h3 {
  margin-bottom: 0.75rem;
}

.progress-cat-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.6rem;
}

.progress-cat-label {
  width: 80px;
  font-size: 0.85rem;
  font-weight: 500;
}

.progress-cat-bar {
  flex: 1;
  height: 10px;
  background: var(--color-border-light);
  border-radius: 5px;
  overflow: hidden;
}

.progress-cat-fill {
  height: 100%;
  border-radius: 5px;
  transition: width 0.6s ease;
}

.progress-cat-percent {
  width: 40px;
  text-align: right;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-text-light);
}

.progress-weakest {
  margin-bottom: 1.5rem;
}

.progress-weakest h3 {
  margin-bottom: 0.75rem;
}

.weak-char-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.weak-char-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 0.5rem 0.75rem;
  background: var(--color-error-light);
  border-radius: var(--radius-sm);
  border: 1px solid rgba(214, 48, 49, 0.15);
}

.weak-char-item .char {
  font-family: var(--font-japanese);
  font-size: 1.3rem;
}

.weak-char-item .mastery {
  font-size: 0.7rem;
  color: var(--color-error);
  font-weight: 600;
}

.progress-history {
  margin-bottom: 1.5rem;
}

.progress-history h3 {
  margin-bottom: 0.75rem;
}

.history-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.6rem 0;
  border-bottom: 1px solid var(--color-border-light);
  font-size: 0.85rem;
}

.history-item:last-child {
  border-bottom: none;
}

.history-category {
  font-weight: 500;
}

.history-score {
  color: var(--color-primary);
  font-weight: 600;
}

.history-date {
  color: var(--color-text-muted);
  font-size: 0.75rem;
}

/* === 16. Modals === */
.modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.4);
  backdrop-filter: blur(4px);
  z-index: 1000;
  justify-content: center;
  align-items: center;
  padding: 1rem;
  animation: fadeIn 0.2s ease;
}

.modal-overlay.active {
  display: flex;
}

.modal-content {
  background: var(--color-card);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  width: 100%;
  max-width: 440px;
  max-height: 85vh;
  overflow-y: auto;
  position: relative;
  animation: modalSlideUp 0.3s ease;
  box-shadow: var(--shadow-lg);
}

.modal-close {
  position: absolute;
  top: 0.75rem;
  right: 0.75rem;
  width: 32px;
  height: 32px;
  border: none;
  background: transparent;
  font-size: 1.5rem;
  color: var(--color-text-muted);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  transition: all var(--transition-fast);
}

.modal-close:hover {
  background: var(--color-border-light);
  color: var(--color-text);
}

.modal-content h3 {
  margin-bottom: 1rem;
  padding-right: 2rem;
}

.modal-actions {
  display: flex;
  gap: 0.5rem;
  margin-top: 1.25rem;
  justify-content: flex-end;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes modalSlideUp {
  from { opacity: 0; transform: translateY(20px) scale(0.98); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

/* === 17. Form Elements === */
.form-group {
  margin-bottom: 1rem;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--color-text-light);
  margin-bottom: 0.3rem;
}

.form-group input[type="text"],
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 0.6rem 0.75rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  outline: none;
  transition: border-color var(--transition-fast);
}

.form-group textarea {
  min-height: 140px;
  resize: vertical;
  font-family: inherit;
  line-height: 1.45;
}

.form-group input[type="text"]:focus,
.form-group textarea:focus,
.form-group select:focus {
  border-color: var(--color-primary);
}

.group-import-modal-content {
  max-width: 620px;
}

.group-import-help {
  margin-top: 0.4rem;
  margin-bottom: 0;
}

.group-import-preview {
  max-height: 260px;
  overflow-y: auto;
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-sm);
  background: var(--color-bg);
}

.group-import-preview:empty {
  display: none;
}

.group-import-summary {
  padding: 0.65rem 0.75rem;
  font-size: 0.85rem;
  color: var(--color-text-light);
  border-bottom: 1px solid var(--color-border-light);
}

.group-import-summary.error {
  color: var(--color-error);
}

.group-import-preview-block {
  padding: 0.65rem 0.75rem;
  border-bottom: 1px solid var(--color-border-light);
}

.group-import-preview-block:last-child {
  border-bottom: none;
}

.group-import-preview-block h4 {
  font-size: 0.78rem;
  margin: 0 0 0.4rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  font-weight: 700;
}

.group-import-preview-block ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.group-import-preview-block li {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  font-size: 0.86rem;
  flex-wrap: wrap;
}

.group-import-preview-main {
  font-weight: 600;
  color: var(--color-text);
}

.group-import-preview-detail {
  color: var(--color-text-muted);
  font-size: 0.8rem;
}

.group-import-preview-block.warning .group-import-preview-main {
  color: var(--color-warning);
}

.group-import-preview-block.muted .group-import-preview-main,
.group-import-preview-more {
  color: var(--color-text-muted);
}

.group-import-candidates {
  flex-basis: 100%;
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  padding-top: 0.15rem;
}

.group-import-candidate {
  border: 1px solid var(--color-border);
  border-radius: 999px;
  background: var(--color-card);
  color: var(--color-text-light);
  padding: 0.22rem 0.55rem;
  font-size: 0.78rem;
  cursor: pointer;
  max-width: 100%;
}

.group-import-candidate.selected {
  border-color: var(--color-primary);
  color: var(--color-primary-dark);
  background: #fff2ef;
}

.color-picker {
  display: flex;
  gap: 0.5rem;
}

.color-option {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 3px solid transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.color-option:hover {
  transform: scale(1.1);
}

.color-option.selected {
  border-color: var(--color-text);
  box-shadow: 0 0 0 2px var(--color-card), 0 0 0 4px var(--color-text);
}

/* Group select list (in add-to-group modal) */
.group-select-list {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  margin-bottom: 0.75rem;
  max-height: 300px;
  overflow-y: auto;
}

.group-select-item {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.6rem 0.75rem;
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.group-select-item:hover {
  border-color: var(--color-primary);
  background: #fff5f5;
}

.group-select-item.selected {
  border-color: var(--color-primary);
  background: #fff5f5;
}

.group-items-modal-content {
  max-width: 600px;
}

.group-items-subtitle {
  margin-bottom: 0.8rem;
}

.group-items-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  max-height: 56vh;
  overflow-y: auto;
}

.group-item-row {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  padding: 0.65rem 0.75rem;
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-sm);
  background: #fff;
}

.group-item-row-clickable {
  cursor: pointer;
  transition: border-color var(--transition-fast), background-color var(--transition-fast);
}

.group-item-row-clickable:hover,
.group-item-row-clickable:focus-visible {
  border-color: var(--color-primary);
  background: #fff7f6;
  outline: none;
}

.group-item-main {
  flex: 1;
  min-width: 0;
}

.group-item-primary {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-text);
  line-height: 1.2;
  word-break: break-word;
}

.group-item-secondary {
  margin-top: 0.2rem;
  font-size: 0.82rem;
  color: var(--color-text-light);
  line-height: 1.25;
  word-break: break-word;
}

.group-item-tertiary {
  margin-top: 0.15rem;
  font-size: 0.75rem;
  color: var(--color-text-muted);
  line-height: 1.25;
  word-break: break-word;
}

.group-item-remove {
  flex-shrink: 0;
}

.example-word-picker-modal-content {
  max-width: 560px;
}

.example-word-picker-subtitle {
  margin-bottom: 0.8rem;
}

.example-word-picker-list {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  max-height: 52vh;
  overflow-y: auto;
}

.example-word-picker-item {
  width: 100%;
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-sm);
  background: #fff;
  color: var(--color-text);
  text-align: left;
  padding: 0.65rem 0.75rem;
  cursor: pointer;
  transition: border-color var(--transition-fast), background-color var(--transition-fast);
}

.example-word-picker-item:hover,
.example-word-picker-item:focus-visible {
  border-color: var(--color-primary);
  background: #fff7f6;
}

.example-word-picker-row {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.6rem;
}

.example-word-picker-jp {
  font-size: 1.02rem;
  line-height: 1.25;
}

.example-word-picker-freq {
  font-size: 0.73rem;
  color: var(--color-text-muted);
  white-space: nowrap;
}

.example-word-picker-meaning {
  margin-top: 0.32rem;
  font-size: 0.82rem;
  color: var(--color-text-light);
}

.sentence-group-picker-modal-content {
  max-width: 620px;
}

.sentence-preview {
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-sm);
  background: var(--color-bg);
  padding: 0.7rem 0.8rem;
}

.sentence-preview-jp {
  font-size: 1.02rem;
  line-height: 1.45;
  color: var(--color-text);
}

.sentence-preview-en {
  margin-top: 0.35rem;
  font-size: 0.84rem;
  color: var(--color-text-light);
}

.sentence-preview-source {
  margin-top: 0.2rem;
  font-size: 0.75rem;
  color: var(--color-text-muted);
}

.sentence-picker-subtitle {
  margin-top: 0.7rem;
  margin-bottom: 0.65rem;
}

.sentence-group-select-list {
  max-height: 46vh;
}

.sentence-group-row {
  gap: 0.5rem;
}

.sentence-group-check {
  width: 16px;
  height: 16px;
}

.sentence-group-count {
  margin-left: auto;
  font-size: 0.74rem;
  color: var(--color-text-muted);
}

.reading-action-modal-content {
  max-width: 520px;
}

.reading-action-buttons {
  flex-direction: column;
  align-items: stretch;
}

.common-reading-warning-modal-content {
  max-width: 520px;
}

.common-reading-warning-modal-content .settings-checkbox {
  margin-top: 0.6rem;
}

/* === 18. Utility Classes === */
.hidden { display: none !important; }
.text-center { text-align: center; }
.text-muted { color: var(--color-text-muted); }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }

/* === 19. Confetti Canvas === */
#confetti-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 9999;
}

/* === 20. Responsive === */
@media (max-width: 640px) {
  .app-header {
    padding: 0.75rem;
  }

  .header-left {
    min-width: 0;
    gap: 0.4rem;
  }

  .header-brand {
    display: flex;
    align-items: center;
    min-width: 0;
  }

  .logo-text {
    font-size: 1.05rem;
    white-space: nowrap;
  }

  .header-right {
    flex-shrink: 0;
    gap: 0.25rem;
  }

  .header-right .btn-icon {
    width: 34px;
    height: 34px;
  }

  .account-status-dot {
    right: 4px;
    bottom: 4px;
  }

  .btn-install span {
    display: none;
  }

  .btn-install {
    padding: 6px;
  }

  .groups-header-actions .btn-sm {
    padding: 0.35rem 0.55rem;
    font-size: 0.75rem;
  }

  .group-flashcards-layout {
    gap: 0.55rem;
    padding: 0.85rem 0.75rem 1rem;
    min-height: calc(100vh - var(--header-height) - 0.9rem);
    height: calc(100vh - var(--header-height) - 0.9rem);
  }

  .group-flashcards-type {
    padding: 0.22rem 0.52rem;
    font-size: 0.72rem;
  }

  .group-flashcard-nav {
    width: 42px;
    min-width: 42px;
    height: 42px;
    font-size: 1.2rem;
  }

  .group-flashcard-card {
    width: 100%;
  }

  .group-flashcard-rating {
    gap: 0.35rem;
  }

  .group-flashcard-rating .btn {
    min-width: 78px;
    padding-inline: 0.55rem;
  }

  .group-flashcard-face {
    padding: 0.85rem;
  }

  .group-flashcard-related-item {
    grid-template-columns: 1fr;
    gap: 0.35rem;
  }

  .group-flashcard-related-meaning {
    max-width: 100%;
    text-align: left;
  }

  .preset-parent-actions {
    margin: 0;
    justify-content: flex-end;
  }

  .preset-parent-toggle {
    padding-right: 0.2rem;
  }

  .home-daily-grid {
    grid-template-columns: 1fr;
  }

  .settings-range-grid {
    grid-template-columns: 1fr;
  }

  .settings-range-chip-group {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .kanji-browse-layout {
    grid-template-columns: 1fr;
    height: auto;
  }

  .kanji-list-panel {
    border-right: none;
    border-bottom: 1px solid var(--color-border-light);
    max-height: 40vh;
  }

  .kanji-list {
    grid-template-columns: repeat(5, 1fr);
  }

  .char-grid {
    grid-template-columns: repeat(5, 1fr);
  }

  .study-quiz-card {
    align-items: stretch;
    flex-direction: column;
  }

  .study-quiz-start {
    width: 100%;
  }

  .quiz-answers {
    grid-template-columns: 1fr;
  }

  .quiz-prompt-char {
    font-size: 3.5rem;
    padding: 1rem 2rem;
  }

  .quiz-info {
    font-size: 0.8rem;
  }

  .results-score {
    font-size: 2.5rem;
  }
}

@media (min-width: 641px) {
  .home-daily-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* === 21. Kanji Search (Sözlük) === */

/* Search screen header with inline search */
.search-screen-header {
  flex-wrap: wrap;
  gap: 0.4rem;
  padding: 0.6rem 1rem !important;
  align-items: center;
}

.search-mode-toggle {
  display: flex;
  background: var(--color-bg);
  border-radius: var(--radius-sm);
  overflow: hidden;
  border: 1px solid var(--color-border);
  flex-shrink: 0;
}

.search-mode-btn {
  padding: 0.35rem 0.75rem;
  font-size: 0.8rem;
  font-weight: 600;
  border: none;
  background: transparent;
  color: var(--color-text-light);
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.search-mode-btn.active {
  background: var(--color-primary);
  color: #fff;
}

.search-header-input {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  flex: 1;
  min-width: 0;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 0.35rem 0.6rem;
  transition: border-color var(--transition-fast);
}

.search-header-input:focus-within {
  border-color: var(--color-primary);
}

.search-header-input svg {
  flex-shrink: 0;
  color: var(--color-text-muted);
}

.search-header-input input {
  flex: 1;
  border: none;
  outline: none;
  background: transparent;
  font-size: 0.85rem;
  color: var(--color-text);
  min-width: 0;
  font-family: var(--font-main);
}

.search-header-input input::placeholder {
  color: var(--color-text-muted);
}

:root[data-theme-mode="dark"] .search-header-input input {
  background: transparent;
}

.kanji-search-toolbar {
  padding: 0.4rem 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.word-search-status-badge {
  align-self: flex-end;
  display: inline-flex;
  align-items: center;
  min-height: 24px;
  padding: 0.2rem 0.55rem;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  background: var(--color-card);
  color: var(--color-text-muted);
  font-size: 0.74rem;
  font-weight: 600;
  letter-spacing: 0.01em;
}

.word-search-status-badge.is-loading {
  color: var(--color-text-light);
}

.word-search-status-badge.is-ready {
  color: var(--color-success);
  border-color: var(--color-success);
  background: var(--color-success-light);
}

.word-search-status-badge.is-error {
  color: var(--color-warning);
  border-color: var(--color-warning);
  background: rgba(240, 180, 41, 0.14);
}

.kanji-search-filters,
.word-search-filters {
  display: flex;
  gap: 0.5rem;
}

.kanji-search-filters select,
.word-search-filters select {
  flex: 1;
  padding: 0.4rem 0.5rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 0.82rem;
  background: var(--color-card);
  color: var(--color-text);
}

.kanji-search-results {
  padding: 0.75rem 1.25rem;
  overflow-y: auto;
  flex: 1;
}

.kanji-search-placeholder {
  text-align: center;
  color: var(--color-text-muted);
  padding: 3rem 1rem;
  font-size: 0.95rem;
}

.kanji-search-count {
  font-size: 0.85rem;
  color: var(--color-text-light);
  margin-bottom: 0.75rem;
}

.kanji-search-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(90px, 1fr));
  gap: 0.5rem;
}

.kanji-search-card {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 0.6rem 0.4rem;
  text-align: center;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.kanji-search-card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-sm);
  transform: translateY(-2px);
}

.kanji-search-card-char {
  font-family: var(--font-japanese);
  font-size: 2rem;
  line-height: 1.2;
}

.kanji-search-card-meaning {
  font-size: 0.7rem;
  color: var(--color-text-light);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin-top: 0.15rem;
}

.kanji-search-card-meta {
  display: flex;
  justify-content: center;
  gap: 0.25rem;
  margin-top: 0.25rem;
}

.meta-badge-sm {
  font-size: 0.6rem;
  padding: 0.1rem 0.3rem;
  background: var(--color-bg);
  border-radius: 4px;
  color: var(--color-text-muted);
}

/* Word search results (in global search) */
.word-search-list {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.word-search-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.6rem 0.75rem;
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.word-search-item:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-sm);
}

.word-search-left {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  min-width: 0;
}

.word-search-jp {
  font-family: var(--font-japanese);
  font-size: 1.15rem;
  font-weight: 500;
  white-space: nowrap;
}

.word-search-reading {
  font-family: var(--font-japanese);
  font-size: 0.8rem;
  color: var(--color-text-light);
  white-space: nowrap;
}

.word-search-right {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  flex-shrink: 0;
}

.word-search-meaning {
  font-size: 0.82rem;
  color: var(--color-text-light);
  max-width: 160px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.hidden {
  display: none !important;
}

/* === 22. Kanji Detail Full Screen === */
.kanji-detail-full {
  padding: 1.25rem;
  overflow-y: auto;
}

/* Active reading highlight */
.reading-wk {
  color: var(--color-primary);
  font-weight: 600;
}

.reading-normal {
  color: var(--color-text-light);
}

.reading-clickable {
  cursor: pointer;
  padding: 0.15rem 0.3rem;
  border-radius: 4px;
  transition: background var(--transition-fast);
  display: inline-block;
}

.reading-clickable:hover {
  background: var(--color-primary-soft);
}

/* WK Badge */
.wk-badge {
  background: var(--color-primary) !important;
  color: #fff !important;
}

/* Radical badges */
.kanji-detail-radicals {
  margin: 0.75rem 0;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.radical-badge {
  display: inline-block;
  padding: 0.2rem 0.5rem;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
  color: var(--color-text-light);
}

/* Clickable related words */
.related-word-item.clickable {
  cursor: pointer;
  transition: background var(--transition-fast);
  padding: 0.55rem 0.5rem;
  border-radius: var(--radius-sm);
  margin: 0;
}

.related-word-item.clickable:hover {
  background: var(--color-bg);
}

/* Clickable word card */
.word-card.clickable {
  cursor: pointer;
}

.word-card.clickable:hover {
  border-color: var(--color-primary-light);
  box-shadow: var(--shadow-sm);
}

/* === 23. Word Detail === */
.word-detail-content {
  padding: 1.25rem;
  overflow-y: auto;
}

.word-detail-word {
  font-family: var(--font-japanese);
  font-size: 3.5rem;
  text-align: center;
  line-height: 1.2;
  margin-bottom: 0.4rem;
  color: var(--color-text);
}

.word-detail-word ruby rt {
  font-size: 0.24em;
  color: var(--color-text-light);
}

.word-detail-reading {
  font-family: var(--font-japanese);
  font-size: 1.3rem;
  text-align: center;
  color: var(--color-text-light);
  margin-bottom: 0.15rem;
}

.word-detail-romaji {
  font-size: 0.95rem;
  text-align: center;
  color: var(--color-text-muted);
  margin-bottom: 1rem;
}

.word-detail-meanings {
  text-align: center;
  margin-bottom: 1rem;
}

.word-detail-meaning {
  display: block;
  font-size: 1.1rem;
  margin-bottom: 0.2rem;
  color: var(--color-text);
}

.word-detail-kanji-section {
  margin: 1.25rem 0;
}

.word-detail-kanji-section h3 {
  font-size: 0.9rem;
  color: var(--color-text-light);
  margin-bottom: 0.5rem;
  font-weight: 600;
}

.word-detail-kanji-list {
  display: flex;
  gap: 0.6rem;
  flex-wrap: wrap;
}

.word-detail-kanji-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 0.6rem 0.8rem;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
  min-width: 70px;
}

.word-detail-kanji-item:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-sm);
  transform: translateY(-2px);
}

.word-detail-kanji-char {
  font-family: var(--font-japanese);
  font-size: 2rem;
  line-height: 1.2;
}

.word-detail-kanji-meaning {
  font-size: 0.72rem;
  color: var(--color-text-light);
  margin-top: 0.15rem;
}

/* Example Sentences */
.word-detail-examples {
  margin: 1.25rem 0;
}

.word-detail-examples h3 {
  font-size: 0.9rem;
  color: var(--color-text-light);
  margin-bottom: 0.5rem;
  font-weight: 600;
}

.example-sentence {
  padding: 0.6rem 0;
  border-bottom: 1px solid var(--color-border);
}

.example-sentence:last-child {
  border-bottom: none;
}

.example-jp {
  font-family: var(--font-japanese);
  font-size: 1rem;
  margin-bottom: 0.2rem;
  color: var(--color-text);
  min-width: 0;
}

.example-en {
  font-size: 0.82rem;
  color: var(--color-text-light);
}

.example-source {
  font-size: 0.72rem;
  color: var(--color-text-muted);
  margin-top: 0.12rem;
}

.examples-loading {
  color: var(--color-text-muted);
  font-size: 0.85rem;
  font-style: italic;
}

/* === 24. Responsive for new screens === */
@media (max-width: 640px) {
  .kanji-search-grid {
    grid-template-columns: repeat(auto-fill, minmax(75px, 1fr));
  }

  .kanji-search-card-char {
    font-size: 1.7rem;
  }

  .word-detail-word {
    font-size: 2.8rem;
  }

  .kanji-detail-full .kanji-detail-char {
    font-size: 4rem;
  }

  .kanji-search-filters,
  .word-search-filters {
    flex-wrap: wrap;
  }

  .search-screen-header {
    gap: 0.35rem;
  }

  .search-header-input {
    order: 3;
    width: 100%;
  }
}

/* === 25. Reduced Motion === */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

/* ===== Study Activity Heatmap ===== */
.progress-heatmap-card {
  background: var(--color-card);
  border-radius: 14px;
  padding: 16px;
  margin: 0 0 16px;
  border: 1px solid var(--color-border);
}

.progress-heatmap-card h3 {
  margin: 0 0 12px;
  font-size: 1rem;
}

.heatmap-grid {
  display: grid;
  grid-auto-flow: column;
  grid-template-rows: repeat(7, 1fr);
  gap: 3px;
  overflow-x: auto;
  padding-bottom: 4px;
}

.heatmap-cell {
  width: 12px;
  height: 12px;
  border-radius: 3px;
  background: var(--color-border-light);
}

.heatmap-cell-empty {
  background: transparent;
}

.heatmap-level-1 { background: color-mix(in srgb, var(--color-primary) 30%, transparent); }
.heatmap-level-2 { background: color-mix(in srgb, var(--color-primary) 55%, transparent); }
.heatmap-level-3 { background: color-mix(in srgb, var(--color-primary) 80%, transparent); }
.heatmap-level-4 { background: var(--color-primary); }

.heatmap-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 10px;
  font-size: 0.78rem;
  color: var(--color-text-muted);
}

.heatmap-legend {
  display: inline-flex;
  align-items: center;
  gap: 3px;
}

.heatmap-legend .heatmap-cell {
  display: inline-block;
}

/* ===== TTS buttons & listening quiz ===== */
.tts-btn {
  background: none;
  border: none;
  cursor: pointer;
  font-size: 1rem;
  padding: 2px 6px;
  border-radius: 6px;
  line-height: 1;
  vertical-align: middle;
  transition: background var(--transition-fast, 0.15s);
}

.tts-btn:hover {
  background: var(--color-primary-soft);
}

.quiz-prompt-audio {
  display: flex;
  align-items: center;
  justify-content: center;
}

.quiz-audio-btn {
  background: var(--color-primary-soft);
  border: 2px solid var(--color-primary);
  border-radius: 50%;
  width: 96px;
  height: 96px;
  font-size: 2.4rem;
  cursor: pointer;
  transition: transform var(--transition-fast, 0.15s);
}

.quiz-audio-btn:active {
  transform: scale(0.93);
}

/* ===== Kanji stroke order & practice ===== */
.kanji-strokes {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: 14px;
  padding: 14px;
  margin: 12px 0;
}

.kanji-strokes-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
}

.kanji-strokes-title {
  font-weight: 600;
  font-size: 0.95rem;
}

.kanji-strokes-actions {
  display: inline-flex;
  gap: 6px;
}

.kanji-strokes-stage {
  position: relative;
  width: 218px;
  height: 218px;
  margin: 0 auto;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  /* Squared-notebook (kareli defter) look: a uniform fine grid of cells. */
  background-image:
    linear-gradient(var(--color-border-light) 1px, transparent 1px),
    linear-gradient(90deg, var(--color-border-light) 1px, transparent 1px);
  background-size: 18.16px 18.16px;
  background-position: top left;
  background-repeat: repeat;
}

.kanji-strokes-svg {
  width: 100%;
  height: 100%;
  display: block;
}

.stroke-ref-path {
  fill: none;
  stroke: var(--color-border);
  stroke-width: 3;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.stroke-anim-path {
  fill: none;
  stroke: var(--color-primary);
  stroke-width: 3.5;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* ===== Guided stroke drawing (kanji practice + draw-the-kanji quiz) =====
   Shared via the `.stroke-draw` class on the drawing stage. The clean
   strokes (anim layer) are revealed one by one as the user draws them
   correctly; the ref layer provides optional guides / hints. */

/* Reference guides hidden by default (recall mode, e.g. the quiz). */
.stroke-draw .stroke-ref-path {
  opacity: 0;
}

/* Practice hints on: faint full-kanji background guide. */
.stroke-draw.show-guides .stroke-ref-path {
  opacity: 1;
  stroke: var(--color-border-light);
}

/* Keep the current target part of the same gray background until an earned hint. */
.stroke-draw.show-guides .stroke-ref-path.is-target {
  stroke: var(--color-border-light);
  opacity: 1;
  stroke-dasharray: none;
}

/* Completed strokes are replaced by the clean (snapped) stroke on top. */
.stroke-draw .stroke-ref-path.is-done {
  opacity: 0 !important;
}

/* Hint (after consecutive misses): reveal + pulse the target stroke even
   when guides are off, plus a dot at its starting point. */
.stroke-draw.show-hint .stroke-ref-path.is-target {
  stroke: var(--color-primary);
  stroke-dasharray: 4 4;
  animation: stroke-hint-pulse 1s ease-in-out infinite;
}

@keyframes stroke-hint-pulse {
  0%, 100% { opacity: 0.4; }
  50% { opacity: 0.9; }
}

.stroke-hint-dot {
  display: none;
  fill: var(--color-primary);
}

.stroke-draw.show-hint .stroke-hint-dot {
  display: block;
}

.kanji-practice-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  touch-action: none;
  cursor: crosshair;
}

/* Red flash when a drawn stroke doesn't match. */
.stroke-draw.practice-error {
  box-shadow: inset 0 0 0 2px var(--color-danger, #e74c3c);
  border-radius: 10px;
}

.kanji-strokes-practice-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  margin-top: 10px;
}

.practice-bar-actions {
  display: inline-flex;
  gap: 6px;
}

.practice-status {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-text-muted);
}

.practice-status.is-complete {
  color: var(--color-success, #27ae60);
}

.btn-hint-toggle.is-off {
  opacity: 0.6;
}

/* ===== Kanji components (KRADFILE) ===== */
.kanji-components {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: 14px;
  padding: 14px;
  margin: 12px 0;
}

.kanji-components-title {
  font-weight: 600;
  font-size: 0.95rem;
  margin-bottom: 10px;
}

.kanji-components-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.component-chip {
  border: 1px solid var(--color-border);
  background: var(--color-bg);
  border-radius: 8px;
  padding: 6px 10px;
  font-size: 1.1rem;
  cursor: pointer;
  transition: all var(--transition-fast, 0.15s);
}

.component-chip:hover,
.component-chip.active {
  border-color: var(--color-primary);
  background: var(--color-primary-soft);
}

:root[data-theme-mode="dark"] .component-chip,
:root[data-theme-mode="dark"] .component-kanji-btn {
  background: #202a35;
  border-color: #344454;
  color: var(--color-text);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.04);
}

:root[data-theme-mode="dark"] .component-chip:hover,
:root[data-theme-mode="dark"] .component-chip.active,
:root[data-theme-mode="dark"] .component-kanji-btn:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: var(--color-primary-light);
  color: var(--color-primary-light);
}

.kanji-components-results {
  margin-top: 12px;
}

.kanji-components-results-title {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-bottom: 8px;
}

.kanji-components-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(44px, 1fr));
  gap: 6px;
}

.component-kanji-btn {
  border: 1px solid var(--color-border);
  background: var(--color-bg);
  border-radius: 8px;
  padding: 8px 0;
  font-size: 1.25rem;
  cursor: pointer;
  transition: all var(--transition-fast, 0.15s);
}

.component-kanji-btn:hover {
  border-color: var(--color-primary);
  background: var(--color-primary-soft);
}

/* ===== Pitch accent display ===== */
.word-detail-pitch {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  margin: 6px 0 10px;
  font-size: 0.95rem;
}

.pitch-label {
  color: var(--color-text-muted);
  font-size: 0.82rem;
}

.pitch-pattern {
  display: inline-flex;
  align-items: flex-end;
  gap: 1px;
}

.pitch-num {
  color: var(--color-text-muted);
  font-size: 0.8rem;
  margin-right: 4px;
}

.pitch-mora {
  font-family: var(--font-japanese);
  padding: 1px 2px;
  line-height: 1.4;
  border-top: 2px solid transparent;
}

.pitch-high {
  border-top-color: var(--color-primary);
}

.pitch-low {
  border-bottom: 2px solid var(--color-border);
}

.pitch-drop {
  border-right: 2px solid var(--color-primary);
}

.word-detail-grammar {
  margin: 10px 0 12px;
}

.word-detail-grammar h3 {
  margin: 0 0 8px;
  font-size: 1rem;
}

.grammar-card {
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 10px;
  background: var(--color-surface);
}

.grammar-card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 8px;
}

.grammar-card-title {
  font-weight: 700;
}

.grammar-confidence {
  color: var(--color-text-muted);
  font-size: 0.78rem;
}

.grammar-confidence-safe {
  color: var(--color-success);
}

.grammar-card-note {
  color: var(--color-text-muted);
  font-size: 0.82rem;
  line-height: 1.4;
  margin: 0 0 8px;
}

.grammar-form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 8px;
}

.grammar-form {
  display: grid;
  gap: 3px;
  padding: 8px;
  border-radius: 6px;
  background: var(--color-bg);
}

.grammar-form-label {
  color: var(--color-text-muted);
  font-size: 0.78rem;
}

.grammar-form-value {
  font-family: var(--font-japanese);
  font-size: 1.05rem;
}

.quiz-srs-review {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-top: 14px;
}

.quiz-srs-review-label {
  width: 100%;
  color: var(--color-text-muted);
  font-size: 0.82rem;
  text-align: center;
}

/* ===== "Download as web application" (mobile PWA install) ===== */
.btn-install {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  border: 1px solid var(--color-primary);
  background: var(--color-primary-soft);
  color: var(--color-primary);
  border-radius: 999px;
  padding: 5px 11px;
  font-size: 0.78rem;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  transition: background var(--transition-fast, 0.15s);
}

.btn-install:hover {
  background: var(--color-primary);
  color: #fff;
}

.btn-install svg {
  flex-shrink: 0;
}

.install-steps {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin: 16px 0 4px;
}

.install-step {
  display: flex;
  align-items: flex-start;
  gap: 10px;
}

.install-step-num {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--color-primary);
  color: #fff;
  font-size: 0.8rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}

.install-step-text {
  line-height: 1.45;
  padding-top: 1px;
}

.install-inline-icon {
  vertical-align: middle;
  margin: 0 2px;
}

/* ===== Draw-the-kanji quiz ===== */
.quiz-draw-host {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.quiz-draw-loading {
  color: var(--color-text-muted);
  padding: 24px;
}

.quiz-draw-status {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-text-muted);
  min-height: 1.2em;
}