/* ===========================================
   Bilingual Journal — Component Styles
   =========================================== */

/* --- Layout --- */
.screen {
  min-height: 100vh;
  background-color: var(--bg-app);
}

.screen-content,
.screen-container {
  width: 100%;
  max-width: 760px;
  margin: 0 auto;
}

.screen-padded {
  padding: 0 16px;
}

.screen-with-tab-bar {
  padding-bottom: calc(96px + env(safe-area-inset-bottom, 0px));
}

/* ヒーロー帯: 背景のみ .app-main 全幅に広げ、内側は screen-content で列幅に揃える */
.hero-band {
  background-color: var(--bg-card);
  padding: 24px 0;
}

.settings-save-bar {
  position: sticky;
  /* 固定タブバー本体・セーフエリア・上罫線の分だけ上に固定 */
  bottom: calc(68px + env(safe-area-inset-bottom, 0px) + var(--border-width));
  z-index: 20;
  /* .screen-content の直下（.screen-padded の兄弟）に置く前提。padding は
     .screen-padded と揃えることでボタン列の横幅をカード列と一致させる */
  margin-top: 24px;
  padding: 12px 16px;
  background-color: var(--bg-app);
  border-top: var(--border-width) solid var(--border-subtle);
}

.settings-save-bar-actions {
  display: flex;
  gap: 8px;
}

.settings-save-bar-actions > button {
  flex: 1;
  height: 44px;
}

.screen-container {
  min-height: 100vh;
  background-color: var(--bg-app);
}

/* --- Card --- */
.card {
  background-color: var(--bg-card);
  border: none;
  border-radius: var(--radius-lg);
  padding: 16px;
}

.card-surface {
  background-color: var(--bg-surface);
  border: none;
  border-radius: var(--radius-lg);
  padding: 16px;
}

/* 保存候補・日記の語彙と文法。見出しから例文まで左揃えの一列で読む。 */
.learning-card {
  min-width: 0;
  width: 100%;
  padding: var(--space-16);
  border: var(--border-width) solid var(--border-default);
  border-radius: var(--radius-lg);
  background: var(--bg-card);
  text-align: left;
  overflow-wrap: anywhere;
}

.learning-candidate-selected {
  border-color: var(--accent-cta);
  background: var(--accent-cta-bg);
}

.learning-candidate-header,
.learning-disclosure-header {
  display: flex;
  align-items: flex-start;
  gap: var(--space-12);
  cursor: pointer;
}

.learning-candidate-header input {
  flex: none;
  width: 18px;
  height: 18px;
  margin-top: var(--space-4);
  accent-color: var(--accent-cta);
  cursor: pointer;
}

.learning-item-heading { display: block; flex: 1; min-width: 0; }
.learning-item-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4) var(--space-12);
  margin-top: var(--space-4);
}

.learning-item-senses {
  display: flex;
  flex-direction: column;
  gap: var(--space-12);
  margin-top: var(--space-8);
}

.learning-item-sense + .learning-item-sense {
  border-top: var(--border-width) solid var(--border-subtle);
  padding-top: var(--space-12);
}

.learning-item-explanation { margin-top: var(--space-8); line-height: 1.5; }
.learning-item-sense ul { padding-inline-start: 1.25em; margin-top: var(--space-8); }
.learning-candidate { position: relative; padding-left: 44px; }
.learning-candidate-header input { position: absolute; left: 16px; top: 16px; }
.learning-candidate-summary { margin-top: var(--space-4); }
.learning-candidate details > summary { cursor: pointer; margin-top: var(--space-8); color: var(--text-secondary); font-size: var(--font-size-label); }
.learning-item-sense { min-width: 0; overflow-wrap: anywhere; }
.learning-item-examples {
  display: flex;
  flex-direction: column;
  gap: var(--space-8);
  margin-top: var(--space-8);
}

.learning-item-example {
  padding: var(--space-8) var(--space-12);
  border-left: 2px solid var(--accent-warning);
  border-radius: var(--radius-sm);
  background: var(--bg-surface);
}
.learning-item-example p + p { margin-top: var(--space-4); line-height: 1.5; }

.learning-disclosure-header { list-style: none; }
.learning-disclosure-header::-webkit-details-marker { display: none; }
.learning-disclosure-chevron {
  display: flex;
  flex: none;
  margin-top: var(--space-4);
  color: var(--text-secondary);
  transition: transform var(--motion-fast) ease;
}
.learning-disclosure[open] .learning-disclosure-chevron {
  transform: rotate(90deg);
  color: var(--accent-cta);
}

.flow-actions {
  display: flex;
  flex-direction: column;
  padding-top: var(--space-16);
  padding-bottom: var(--space-16);
}
.flow-actions > button { flex: none; width: 100%; max-width: 100%; align-self: center; }
.flow-status { text-align: center; padding: var(--space-48) 0; }
.transcript-entry { width: fit-content; max-width: 85%; }
.transcript-entry-user { margin-left: auto; }
.conversation-speed-toolbar { justify-content: center; }
.conversation-failure > .flex { justify-content: center; }

/* 列幅は screen-content に集約。フローの操作ボタンのみ大画面では内容幅。 */
@media (min-width: 768px) {
  .flow-actions > button {
    width: fit-content;
    padding-left: var(--space-24);
    padding-right: var(--space-24);
  }
}

.diary-sentence {
  display: inline;
  font: inherit;
  text-align: inherit;
  white-space: pre-wrap;
  border-radius: var(--radius-sm);
  padding: 2px 4px;
}

.diary-sentence-active {
  color: var(--accent-cta);
  background-color: var(--accent-cta-bg);
}

.diary-sentence-active .diary-word {
  background-color: var(--accent-cta-bg);
}

.learning-term-row { display: flex; align-items: center; gap: var(--space-4); }
.learning-term-row > :first-child { min-width: 0; overflow-wrap: anywhere; }
.vocabulary-audio { display: inline-flex; align-items: center; flex: none; }
.vocabulary-audio-button { display: inline-flex; align-items: center; justify-content: center; width: 44px; height: 44px; border-radius: var(--radius-pill); color: var(--accent-cta); }
.vocabulary-audio-button:hover { background: var(--accent-cta-bg); }
.vocabulary-audio-button svg { width: 20px; height: 20px; }
.vocabulary-audio-button[aria-busy="true"] { opacity: 0.5; }

/* --- Button --- */
.btn-primary {
  width: 100%;
  height: 52px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  font-weight: var(--font-weight-title);
  font-size: var(--font-size-title);
  background-color: var(--accent-cta);
  color: var(--on-accent);
  transition: opacity var(--motion-base) ease, transform var(--motion-fast) ease;
}

.btn-primary:hover { opacity: 0.9; }
.btn-primary:active { transform: scale(0.98); }
.btn-primary:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }

.btn-outline {
  width: 100%;
  height: 52px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: var(--font-weight-title);
  font-size: var(--font-size-title);
  border: var(--border-width) solid var(--border-default);
  background-color: transparent;
  color: var(--text-secondary);
  transition: opacity var(--motion-base) ease, transform var(--motion-fast) ease;
}

.btn-outline:hover { opacity: 0.9; }
.btn-outline:active { transform: scale(0.98); }
.btn-outline:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: var(--space-10) 20px;
  border-radius: var(--radius-md);
  border: var(--border-width) solid var(--border-default);
  background-color: transparent;
  color: var(--text-secondary);
  font-size: var(--font-size-body);
  font-weight: 500;
  transition: background-color var(--motion-fast) ease, transform var(--motion-fast) ease;
}

.btn-secondary:hover { background-color: var(--bg-surface); }
.btn-secondary:active { transform: scale(0.98); }

.text-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-cta);
  font-size: var(--font-size-body);
  font-weight: 500;
  text-decoration: none;
}

.text-link:hover { text-decoration: underline; }

/* カード内ヘッダー行に収まる小型アクセントボタン（選択カード等） */
.btn-primary-sm {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-6);
  padding: 8px 16px;
  border-radius: var(--radius-pill);
  background-color: var(--accent-cta);
  color: var(--on-accent);
  font-size: var(--font-size-meta);
  font-weight: var(--font-weight-title);
  white-space: nowrap;
  transition: opacity var(--motion-base) ease, transform var(--motion-fast) ease;
}

.btn-primary-sm:hover { opacity: 0.9; }
.btn-primary-sm:active { transform: scale(0.98); }
.btn-primary-sm:disabled { opacity: 0.5; }

.icon-button {
  width: 36px;
  height: 36px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  background-color: transparent;
  color: var(--text-secondary);
  transition: background-color var(--motion-fast) ease, transform var(--motion-fast) ease;
}

.icon-button:hover { background-color: var(--bg-surface); }
.icon-button:active { transform: scale(0.98); }

/* --- Badge / Pill --- */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 8px;
  border-radius: var(--radius-pill);
  font-size: var(--font-size-label);
  font-weight: var(--font-weight-label);
  letter-spacing: var(--letter-spacing-label);
}

.badge-cta {
  background-color: var(--accent-cta-bg);
  color: var(--accent-cta);
}

.badge-success {
  background-color: var(--accent-success-bg);
  color: var(--accent-success);
}

.badge-warning {
  background-color: var(--accent-warning-bg);
  color: var(--accent-warning);
}

.badge-muted {
  background-color: var(--bg-surface);
  color: var(--text-muted);
  border: none;
}

.cefr-a1 { background-color: var(--cefr-a1-bg); color: var(--cefr-a1-text); }
.cefr-a2 { background-color: var(--cefr-a2-bg); color: var(--cefr-a2-text); }
.cefr-b1 { background-color: var(--cefr-b1-bg); color: var(--cefr-b1-text); }
.cefr-b2 { background-color: var(--cefr-b2-bg); color: var(--cefr-b2-text); }
.cefr-c1 { background-color: var(--cefr-c1-bg); color: var(--cefr-c1-text); }
.cefr-c2 { background-color: var(--cefr-c2-bg); color: var(--cefr-c2-text); }


/* --- Tab Bar --- */
.onboarding-login-bar {
  position: fixed;
  top: 0;
  right: 0;
  z-index: 20;
  padding: 12px 16px;
  text-align: right;
  background: var(--bg-app);
}

.tab-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background-color: var(--tab-bar-bg);
  border-top: var(--border-width) solid var(--tab-bar-border);
  padding-bottom: env(safe-area-inset-bottom, 0px);
  transition: transform var(--motion-base) ease-in;
  z-index: 50;
}

.tab-bar-hidden {
  /* .tab-fab はバー上端から 24px 張り出すため、その分も含めて画面外へ送る */
  transform: translateY(calc(100% + 32px));
}

.tab-bar-inner {
  width: 100%;
  margin: 0 auto;
  height: 68px;
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  align-items: center;
  justify-content: space-around;
  padding: 10px 0 8px;
}

.tab-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  flex: 1;
  position: relative;
  min-height: 44px;
  min-width: 0;
  white-space: nowrap;
}

.tab-label {
  font-size: var(--font-size-label);
}

.tab-dot {
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background-color: var(--accent-cta);
  position: absolute;
  bottom: 4px;
}

.tab-fab {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--accent-cta);
  margin-top: -24px;
  justify-self: center;
  flex-shrink: 0;
  box-shadow: var(--shadow-floating);
  border: none;
}

/* --- Section Header --- */
.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

.section-title {
  font-size: var(--font-size-title);
  font-weight: var(--font-weight-title);
  color: var(--text-primary);
}

.section-link {
  font-size: var(--font-size-meta);
  font-weight: 500;
  color: var(--accent-cta);
}

/* --- Activity Calendar --- */
.calendar-toolbar {
  display: grid;
  grid-template-columns: 36px 1fr 36px;
  align-items: center;
  gap: 8px;
}

.calendar-toolbar h2 {
  text-align: center;
}

.calendar-error {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px;
  border-radius: var(--radius-md);
  background-color: var(--accent-warning-bg);
  border: none;
}

.calendar-error .btn-secondary {
  width: auto;
  height: 36px;
  padding: 0 12px;
  flex-shrink: 0;
  background-color: var(--bg-card);
}

.calendar-weekdays,
.calendar-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: var(--space-6);
}

.calendar-weekdays {
  color: var(--text-muted);
  font-size: var(--font-size-label);
  font-weight: var(--font-weight-label);
  text-align: center;
}

.calendar-cell {
  aspect-ratio: 1;
  min-width: 0;
  border-radius: var(--radius-sm);
}

.calendar-cell-empty {
  background-color: transparent;
}

.calendar-day {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  background-color: var(--bg-card);
  border: var(--border-width) solid var(--border-default);
  color: var(--text-primary);
  transition: border-color var(--motion-fast) ease, background-color var(--motion-fast) ease, transform var(--motion-fast) ease;
}

.calendar-day:hover {
  border-color: var(--accent-cta-border);
}

.calendar-day:active {
  transform: scale(0.98);
}

.calendar-day-today {
  outline: 2px solid var(--accent-cta);
  outline-offset: -2px;
}

.calendar-day-selected {
  background-color: var(--accent-cta-bg);
  border-color: var(--accent-cta);
}

.calendar-day-number {
  font-size: var(--font-size-body);
  font-weight: var(--font-weight-title);
  line-height: 1;
}

.calendar-dots {
  display: flex;
  justify-content: center;
  gap: 3px;
  min-height: 5px;
}

.calendar-dot {
  width: 5px;
  height: 5px;
  border-radius: 50%;
}

.calendar-dot-diary {
  background-color: var(--accent-diary);
}

.calendar-dot-conversation {
  background-color: var(--accent-success);
}

.daily-activity {
  padding-top: 8px;
}

.daily-activity-heading {
  margin-bottom: 8px;
  text-transform: uppercase;
}

.daily-activity-empty {
  padding: 12px 0;
}

.sheet-overlay {
  position: fixed;
  inset: 0;
  z-index: 100;
  background-color: var(--overlay-scrim);
  display: flex;
  align-items: flex-end;
  justify-content: center;
}

.day-detail-sheet {
  width: 100%;
  max-width: 480px;
  max-height: 80vh;
  overflow-y: auto;
  background-color: var(--bg-app);
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  padding: 20px 16px 32px;
}

/* デスクトップも共通の1列。選択日の詳細はカレンダーの下に表示。 */
.day-detail-placeholder {
  display: none;
}

@media (min-width: 1024px) {
  .calendar-layout {
    display: flex;
    flex-direction: column;
    gap: 24px;
  }

  .calendar-detail-pane {
    min-width: 0;
  }

  .day-detail-placeholder {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 240px;
    border: var(--border-width) solid var(--border-subtle);
    border-radius: var(--radius-lg);
    background-color: var(--bg-surface);
  }

  /* シートをモーダルからインラインパネルに切替 */
  .calendar-detail-pane .sheet-overlay {
    position: static;
    inset: auto;
    z-index: auto;
    background-color: transparent;
    display: block;
    animation: none;
  }

  .calendar-detail-pane .day-detail-sheet {
    max-width: none;
    max-height: none;
    border-radius: var(--radius-lg);
    border: var(--border-width) solid var(--border-subtle);
    background-color: var(--bg-surface);
    animation: none;
    padding: 20px 16px 24px;
  }
}

/* --- Sticky Header --- */
.sticky-header {
  position: sticky;
  top: 0;
  background-color: var(--bg-app);
  z-index: 10;
  padding: 16px;
}

/* --- Search Bar --- */
.search-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  border-radius: var(--radius-md);
  background-color: var(--bg-surface);
  border: var(--border-width) solid var(--border-default);
  transition: border-color var(--motion-base) ease, box-shadow var(--motion-base) ease;
}

.search-bar:focus-within {
  border-color: var(--accent-cta);
  box-shadow: 0 0 0 3px var(--accent-cta-bg);
}

.search-bar input {
  flex: 1;
  font-size: var(--font-size-body);
}

.search-bar input:focus-visible {
  outline: none;
}

/* --- Vocabulary Card --- */
/* hover は共通の card-hover（背景色）に委ねる */
.vocab-card {
  padding: 12px 16px;
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

.vocab-card-main {
  display: flex;
  align-items: center;
  gap: 8px;
}

.vocab-card-text {
  display: flex;
  align-items: baseline;
  gap: 8px;
  flex: 1;
  min-width: 0;
}

.vocab-card-term {
  font-size: var(--font-size-title);
  font-weight: 600;
  color: var(--text-primary);
  flex-shrink: 0;
  max-width: 60%;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.vocab-card-dash {
  color: var(--text-muted);
  flex-shrink: 0;
}

.vocab-card-translation {
  font-size: var(--font-size-body);
  color: var(--text-secondary);
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.vocab-card-aside {
  position: absolute;
  inset-inline-end: 0;
  top: 50%;
  transform: translateY(-50%);
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

/* button 直下では p が不正なため span + display: block で行を作る */
.vocab-card-sub {
  display: block;
  font-size: var(--font-size-meta);
  color: var(--text-muted);
  margin-top: var(--space-2);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* --- Segment Control --- */
.segment-control {
  display: flex;
  border-radius: var(--radius-md);
  padding: 4px;
  background-color: var(--segment-bg);
}

.segment-item {
  flex: 1;
  padding: 8px;
  border-radius: var(--radius-sm);
  font-size: var(--font-size-meta);
  font-weight: 500;
  text-align: center;
  transition: background-color var(--motion-base), color var(--motion-base);
  color: var(--segment-inactive-text);
}

.segment-item-active {
  background-color: var(--segment-active-bg);
  color: var(--segment-active-text);
  box-shadow: var(--segment-shadow);
}

/* --- Composer (pipeline のテキスト / 音声入力バー) --- */
.composer {
  /* 円形アクションと入力欄の高さ。.tab-fab と同じ 48px（--space-12 の上下 padding + body 行高） */
  --composer-control-size: 48px;
  position: sticky;
  bottom: 0;
  z-index: 20;
  margin-top: auto;
  padding: var(--space-8) var(--space-16) calc(var(--space-12) + env(safe-area-inset-bottom, 0px));
  background-color: var(--conversation-bg);
  border-top: var(--border-width) solid var(--border-subtle);
}

.composer-warning { margin-bottom: var(--space-4); }

.voice-preview-dock {
  position: sticky;
  bottom: 0;
  background-color: var(--conversation-bg);
  padding: var(--space-8) var(--space-16) env(safe-area-inset-bottom, 0px);
}

.voice-preview {
  padding: var(--space-12) var(--space-16);
  margin-bottom: var(--space-8);
  border: var(--border-width) dashed var(--border-default);
  border-radius: var(--radius-md);
}

.voice-preview-text {
  margin: var(--space-8) 0;
  max-height: 7em;
  overflow-y: auto;
  overflow-wrap: anywhere;
  white-space: pre-wrap;
}

.composer-row {
  display: flex;
  align-items: flex-end;
  gap: var(--space-8);
}

.composer-field {
  flex: 1;
  min-width: 0;
  min-height: var(--composer-control-size);
  /* 4 行分（body 行高 × 4 + 上下 padding） */
  max-height: calc(var(--font-size-body) * var(--line-height-body) * 4 + var(--space-24));
  padding: var(--space-12) var(--space-16);
  border-radius: var(--radius-pill);
  background-color: var(--bg-card);
  /* mobile の outlineVariant(borderSubtle) と同じ段階に揃える（PR #725 A 案） */
  border: var(--border-width) solid var(--border-subtle);
  color: var(--text-primary);
  font-size: var(--font-size-body);
  line-height: var(--line-height-body);
  resize: none;
  field-sizing: content;
  box-sizing: border-box;
  transition: border-color var(--motion-base) ease, box-shadow var(--motion-base) ease;
}

.composer-field:focus-visible {
  outline: none;
  border-color: var(--accent-cta);
  box-shadow: 0 0 0 3px var(--accent-cta-bg);
}

.composer-field:disabled { color: var(--text-muted); }

.composer-recording {
  display: flex;
  align-items: center;
  gap: var(--space-8);
  color: var(--text-secondary);
}

.composer-recording-dot {
  width: var(--space-8);
  height: var(--space-8);
  border-radius: 50%;
  background-color: var(--accent-warning);
  animation: pulse-dot 1.2s ease-in-out infinite;
}

.composer-action {
  flex: none;
  width: var(--composer-control-size);
  height: var(--composer-control-size);
  border-radius: 50%;
  border: none;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
  transition: background-color var(--motion-base) ease, transform var(--motion-base) ease;
}

.composer-action-mic,
.composer-action-send {
  background-color: var(--accent-cta);
  color: var(--on-accent);
}

.composer-action-recording {
  background-color: var(--accent-warning);
  color: var(--on-accent);
}

.composer-action-waiting,
.composer-action:disabled {
  background-color: var(--mic-waiting-bg);
  color: var(--text-muted);
  cursor: default;
}

.composer-action .waiting-dot {
  width: var(--space-4);
  height: var(--space-4);
}

.filter-chip-row {
  display: flex;
  gap: 8px;
  overflow-x: auto;
}

.choice-chip-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
}

.choice-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  height: 32px;
  padding: 0 12px;
  border-radius: var(--radius-sm);
  border: var(--border-width) solid var(--border-default);
  background-color: transparent;
  font-size: var(--font-size-body);
  font-weight: 500;
  color: var(--text-primary);
}

.choice-chip-active {
  background-color: var(--accent-diary-bg);
  border-color: transparent;
}

.option-card {
  width: 100%;
  min-height: 56px;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: var(--space-14) var(--space-16);
  border-radius: var(--radius-md);
  border: var(--border-width) solid var(--border-default);
  background-color: var(--bg-surface);
  color: var(--text-primary);
  text-align: left;
  transition: border-color var(--motion-base) ease, background-color var(--motion-base) ease, transform var(--motion-fast) ease;
}

.option-card:hover {
  border-color: var(--accent-cta-border);
}

.option-card:active {
  transform: scale(0.99);
}

.option-card-active {
  border-color: var(--accent-cta);
  background-color: var(--accent-cta-bg);
}

.option-card-check {
  width: 22px;
  height: 22px;
  border-radius: 6px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 auto;
  background-color: var(--accent-cta);
}

.progress-segment {
  height: 4px;
  flex: 1;
  border-radius: var(--radius-pill);
  background-color: var(--border-default);
  transition: background-color var(--motion-base) ease;
}

.progress-segment-filled {
  background-color: var(--accent-cta);
}

/* 下部ウォッシュは背景扱い: 中身（CTA・ヒント）より下に描く */
.onboarding-wash {
  position: relative;
  overflow: hidden;
}

.onboarding-wash > * {
  position: relative;
  z-index: 1;
}

.onboarding-wash::after {
  content: "";
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  height: 40vh;
  z-index: 0;
  pointer-events: none;
  background: linear-gradient(to top, var(--accent-cta-bg), transparent);
}

.filter-chip {
  display: inline-flex;
  align-items: center;
  gap: var(--space-6);
  padding: var(--space-6) var(--space-12);
  border-radius: var(--radius-pill);
  border: var(--border-width) solid var(--border-default);
  font-size: var(--font-size-meta);
  color: var(--text-secondary);
  white-space: nowrap;
}

/* --- Flag Icon --- */
.flag-icon {
  display: block;
  object-fit: cover;
  border: none;
  border-radius: 4px;
  flex-shrink: 0;
}

.filter-chip-active {
  background-color: var(--segment-active-bg);
  color: var(--segment-active-text);
  border-color: transparent;
  box-shadow: var(--segment-shadow);
}

/* --- Toggle Switch --- */
.toggle {
  position: relative;
  width: 48px;
  height: 28px;
  border-radius: var(--radius-pill);
  background-color: var(--border-default);
  transition: background-color var(--motion-base);
  cursor: pointer;
}

.toggle-active {
  background-color: var(--accent-cta);
}

.toggle-knob {
  position: absolute;
  top: 4px;
  left: 4px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background-color: white;
  transition: transform var(--motion-base);
}

.toggle-active .toggle-knob {
  transform: translateX(20px);
}

/* --- Audio Player --- */
.audio-player {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px;
  border-radius: var(--radius-md);
  background-color: var(--audio-player-bg);
}

.audio-play-btn {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--accent-cta);
  flex-shrink: 0;
}

.audio-progress {
  flex: 1;
  height: 3px;
  border-radius: 2px;
  background-color: var(--audio-progress-bg);
  overflow: hidden;
}

.audio-progress-fill {
  height: 100%;
  border-radius: 2px;
  background-color: var(--accent-cta);
}

.audio-speed {
  font-size: var(--font-size-label);
  font-weight: var(--font-weight-label);
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  background-color: var(--accent-cta-bg);
  color: var(--accent-cta);
}

/* --- Conversation Bubbles --- */
.bubble {
  font-size: var(--font-size-conversation-body);
  line-height: var(--line-height-conversation-body);
  max-width: 85%;
  overflow-wrap: anywhere;
  border-radius: var(--radius-md);
  padding: 12px;
}

.bubble-ai {
  border-top-left-radius: 0;
  background-color: var(--bubble-ai-bg);
  border: none;
  color: var(--bubble-ai-text);
}

.bubble-user {
  background-color: var(--bubble-user-bg);
  border: none;
  color: var(--bubble-user-text);
  margin-left: auto;
}

/* --- Interactive Row (hover/tap) --- */
.row-hover {
  transition: background-color var(--motion-fast) ease;
}

.row-hover:hover { background-color: var(--bg-surface); }

/* --- Line Clamp --- */
.line-clamp-2 {
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.line-clamp-1 {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* 一覧カード本文プレビュー: 2行未満でも2行分の高さを確保 */
.card-snippet {
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  line-height: 1.7;
  min-height: 3.4em; /* 2行 × line-height 1.7 */
}

/* --- Typography Roles --- */
.text-display {
  font-size: var(--font-size-display);
  font-weight: var(--font-weight-display);
  letter-spacing: var(--letter-spacing-display);
}

.text-heading {
  font-size: var(--font-size-heading);
  font-weight: var(--font-weight-heading);
}

.text-title {
  font-size: var(--font-size-title);
  font-weight: var(--font-weight-title);
}

.text-body {
  font-size: var(--font-size-body);
  font-weight: var(--font-weight-body);
  line-height: var(--line-height-body);
}

.text-meta {
  font-size: var(--font-size-meta);
  font-weight: var(--font-weight-meta);
}

.text-label {
  font-size: var(--font-size-label);
  font-weight: var(--font-weight-label);
  letter-spacing: var(--letter-spacing-label);
}

/* 旧 text-lg（見出し相当）。既存ビュー互換用 */
.text-lg {
  font-size: var(--font-size-heading);
}

/* --- Text Colors --- */
.text-primary { color: var(--text-primary); }
.text-secondary { color: var(--text-secondary); }
.text-muted { color: var(--text-muted); }
.text-cta { color: var(--accent-cta); }
.text-success { color: var(--accent-success); }
.text-warning { color: var(--accent-warning); }

/* --- Background Colors --- */
.bg-app { background-color: var(--bg-app); }
.bg-surface { background-color: var(--bg-surface); }
.bg-card { background-color: var(--bg-card); }

/* --- Spacing Helpers --- */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.flex-1 { flex: 1; }
.flex-wrap { flex-wrap: wrap; }
.items-center { align-items: center; }
.items-start { align-items: flex-start; }
.items-end { align-items: flex-end; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.justify-around { justify-content: space-around; }
.gap-1 { gap: 4px; }
.gap-2 { gap: 8px; }
.gap-3 { gap: 12px; }
.gap-4 { gap: 16px; }
.gap-6 { gap: 24px; }
.gap-8 { gap: 32px; }
.p-8 { padding: 32px; }
.text-left { text-align: left; }
.text-center { text-align: center; }
.text-right { text-align: right; }
.w-full { width: 100%; }
.relative { position: relative; }
.absolute { position: absolute; }
.overflow-x-auto { overflow-x: auto; }
.overflow-y-auto { overflow-y: auto; }
.whitespace-nowrap { white-space: nowrap; }
.flex-shrink-0 { flex-shrink: 0; }
.min-w-0 { min-width: 0; }
.grid { display: grid; }
.grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid-cols-4 { grid-template-columns: repeat(4, 1fr); }
.space-y-2 > * + * { margin-top: 8px; }
.space-y-3 > * + * { margin-top: 12px; }
.space-y-4 > * + * { margin-top: 16px; }
.space-y-6 > * + * { margin-top: 24px; }

/* --- Cyrillic Typography --- */
.font-cyrillic {
  font-family: var(--font-cyrillic);
  letter-spacing: 0;
}

.font-cyrillic-lg {
  font-family: var(--font-cyrillic);
  font-weight: 600;
  letter-spacing: -0.01em;
}

/* --- Diary Typography (serif) --- */
.font-diary {
  font-family: var(--font-diary);
  font-size: var(--font-size-diary-body);
  font-weight: var(--font-weight-diary-body);
  line-height: var(--line-height-diary-body);
  letter-spacing: 0;
}

/* ===========================================
   Desktop Layout (>=1024px) — 左固定サイドバー + 中央コンテンツ列
   =========================================== */

/* モバイル(既定): サイドバー非表示 — SSR/ハイドレーション安全 */
.side-nav { display: none; }

/* モバイルは全幅を使いながら、主要要素を画面端から十分に離す */
@media (max-width: 1023px) {
  .screen-padded,
  .sticky-header,
  .settings-save-bar,
  .composer,
  .voice-preview-dock {
    padding-left: var(--space-24);
    padding-right: var(--space-24);
  }
}

@media (min-width: 1024px) {
  .app-shell {
    /* レイアウト定数はトークン非依存（theme.css は自動生成のため不変更） */
    --sidenav-width: 264px;
  }

  .side-nav {
    display: flex;
    flex-direction: column;
    gap: 4px;
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: var(--sidenav-width);
    padding: 20px 16px;
    background-color: var(--bg-app);
    border-right: var(--border-width) solid var(--border-subtle);
    z-index: 40;
  }

  .side-nav-logo {
    display: flex;
    align-items: center;
    gap: 8px;
    line-height: 1.15;
    font-size: var(--font-size-heading);
    font-weight: var(--font-weight-title);
    color: var(--text-primary);
    padding: 8px 12px;
    margin-bottom: 12px;
  }

  .side-nav-cta {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    height: 44px;
    margin-bottom: 20px;
    border-radius: var(--radius-md);
    background-color: var(--accent-cta);
    color: var(--on-accent);
    font-size: var(--font-size-body);
    font-weight: var(--font-weight-title);
    transition: opacity var(--motion-base) ease, transform var(--motion-fast) ease;
  }
  .side-nav-cta:hover { opacity: 0.9; }
  .side-nav-cta:active { transform: scale(0.98); }

  /* button の auto 幅は shrink-to-fit のため、明示指定でサイドバー幅いっぱいに拡張 */
  .side-nav-item {
    display: flex;
    width: 100%;
    align-items: center;
    gap: 12px;
    padding: var(--space-10) var(--space-12);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-size: var(--font-size-body);
    text-align: left;
    transition: background-color var(--motion-fast) ease;
  }
  .side-nav-item:hover { background-color: var(--bg-surface); }
  .side-nav-item[aria-current="page"] {
    background-color: var(--accent-cta-bg);
    color: var(--accent-cta);
    font-weight: 500;
  }

  /* コンテンツ領域: サイドバー分を除いた残り空間に配置 */
  .app-main { margin-left: var(--sidenav-width); }

  .screen-padded,
  .sticky-header,
  .settings-save-bar,
  .composer,
  .voice-preview-dock {
    padding-left: var(--space-32);
    padding-right: var(--space-32);
  }

  /* デスクトップではタブバー非表示、下部余白も縮小 */
  .app-shell .tab-bar { display: none; }
  /* サイドバー表示ではタブバーが無いため、保存バーは画面最下部に固定 */
  .app-shell .settings-save-bar { bottom: 0; }
  .app-shell .screen-with-tab-bar { padding-bottom: var(--space-48); }

}

/* 面と余白による学習実績のまとまり */
.profile-metrics {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--space-16);
  padding: var(--space-16);
  border-radius: var(--radius-lg);
  background: var(--metrics-bg);
}
.profile-metric { min-width: 0; text-align: center; }
.profile-metric-value {
  display: flex; justify-content: center; align-items: center; gap: var(--space-4);
  font-size: var(--font-size-metric); font-weight: var(--font-weight-metric);
  line-height: var(--line-height-metric); overflow-wrap: anywhere;
  margin-bottom: var(--space-8);
}
.profile-metric-label { font-size: var(--font-size-meta); color: var(--text-secondary); overflow-wrap: anywhere; }
.profile-avatar {
  width: 64px; height: 64px; border-radius: 50%; display: flex;
  align-items: center; justify-content: center; background: var(--accent-cta-bg);
}
.btn-primary, .btn-outline { height: auto; min-height: 52px; padding: 12px 16px; }
.btn-primary:disabled, .btn-outline:disabled {
  opacity: 1; background: var(--bg-surface); color: var(--text-muted);
}
:where(button, a, input, textarea, select, [tabindex]):focus-visible {
  outline: 2px solid var(--accent-cta); outline-offset: 3px;
}
@media (max-width: 359px) {
  .profile-metrics { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (min-width: 360px) {
  .profile-metrics { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}

.bubble .text-body { font-size: inherit; line-height: inherit; }
.composer-action-recording { color: var(--on-warning); }

.input, .search-input, .composer-field, input, textarea, select { border-color: var(--border-control); }

/* 本文と語彙追加。インラインの文字組み・範囲選択を維持する。 */
.diary-selectable-body .font-diary { white-space: pre-wrap; }
.diary-word {
  display: inline; padding: 0; border: 0; border-radius: 2px;
  background: transparent; color: inherit; font: inherit;
  line-height: inherit; text-align: inherit; user-select: text; cursor: pointer;
}
.diary-word:hover, .diary-word:focus-visible { background: var(--accent-cta-bg); }
.diary-popover-dismiss { position: fixed; inset: 0; z-index: 100; background: transparent; border: 0; }
.diary-word-popover {
  position: fixed; z-index: 101; display: flex; align-items: center; gap: var(--space-8);
  width: min(280px, calc(100vw - 24px)); max-height: calc(100dvh - 24px);
  padding: var(--space-8); border-radius: var(--radius-pill);
  border: var(--border-width) solid var(--border-default); background: var(--bg-surface);
  box-shadow: var(--shadow-floating); color: var(--text-primary);
}
.diary-word-selected { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; padding-inline-start: var(--space-8); font-weight: 600; }
.diary-word-add { flex: 0 0 auto; padding: var(--space-8) var(--space-12); border: 0; border-radius: var(--radius-pill); background: var(--accent-cta); color: var(--on-accent); font: inherit; font-size: 13px; font-weight: 600; cursor: pointer; }
.diary-word-popover .text-warning { position: absolute; top: 100%; left: 0; padding: var(--space-8); border-radius: var(--radius-sm); background: var(--bg-surface); }
.diary-vocabulary-toasts { position: fixed; z-index: 102; top: calc(var(--space-16) + env(safe-area-inset-top, 0px)); right: var(--space-16); display: flex; flex-direction: column; gap: var(--space-8); width: min(320px, calc(100vw - 32px)); pointer-events: none; }
.diary-vocabulary-toast { display: flex; align-items: center; gap: var(--space-12); padding: var(--space-12); border: var(--border-width) solid var(--border-default); border-radius: var(--radius-md); background: var(--bg-card); box-shadow: var(--shadow-floating); pointer-events: auto; }
.diary-vocabulary-toast-icon { display: grid; place-items: center; width: 24px; height: 24px; flex: 0 0 auto; border-radius: var(--radius-pill); background: var(--accent-cta-bg); color: var(--accent-cta); font-weight: 700; }
.diary-vocabulary-toast-icon-success { background: var(--accent-success-bg); color: var(--accent-success); }
.diary-vocabulary-toast-icon-error { background: var(--accent-warning-bg); color: var(--accent-warning); }
.diary-vocabulary-toast-text { display: flex; flex: 1; min-width: 0; flex-direction: column; gap: var(--space-2); font-size: 13px; }
.diary-vocabulary-toast-text strong { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.diary-vocabulary-toast-text span { color: var(--text-secondary); }
.diary-vocabulary-retry { border: 0; background: transparent; color: var(--accent-cta); font: inherit; font-size: 13px; cursor: pointer; }
.diary-vocabulary-toast-close { display: grid; place-items: center; width: 32px; height: 32px; flex: 0 0 auto; padding: 0; border: 0; border-radius: var(--radius-pill); background: transparent; color: var(--text-secondary); cursor: pointer; }
.diary-vocabulary-toast-close:hover, .diary-vocabulary-toast-close:focus-visible { background: var(--bg-surface); color: var(--text-primary); }
/* 矢印は副行を含む詳細ボタン全体の中央に配置。右端に専用の余白を確保。 */
.vocab-card-open { position: relative; flex: 1; min-width: 0; padding-inline-end: 24px; }
.vocab-card-audio { flex: 0 0 auto; }
.vocabulary-detail .screen-padded { display: flex; flex-direction: column; align-items: stretch; }
.vocabulary-detail ul { margin-inline: 0; padding-inline-start: 0; list-style-position: inside; }

/* 語彙追加は画面をまたいで対象と処理状態を追跡できる。 */
.diary-vocabulary-toasts { max-height: min(45dvh, 480px); overflow-y: auto; overscroll-behavior: contain; }
.diary-vocabulary-toast { animation: vocabulary-toast-in var(--motion-base) ease-out both; flex-shrink: 0; }
.diary-vocabulary-toast.toast-closing { animation: vocabulary-toast-out var(--motion-base) ease-in both; }
.diary-vocabulary-toast-text strong { white-space: normal; overflow-wrap: anywhere; }
.diary-vocabulary-toast-text a { color: var(--accent-cta); }
.learning-pending { display: flex; gap: var(--space-12); align-items: center; padding: var(--space-16); }
.learning-pending strong { overflow-wrap: anywhere; }
.vocabulary-spinner { display: inline-block; width: 20px; height: 20px; flex: 0 0 20px; border: 2px solid var(--accent-cta-bg); border-top-color: var(--accent-cta); border-radius: 50%; animation: vocabulary-spin 900ms linear infinite; background: transparent; }
@keyframes vocabulary-spin { to { transform: rotate(360deg); } }
@keyframes vocabulary-toast-in { from { opacity: 0; transform: translateY(-8px); } to { opacity: 1; transform: translateY(0); } }
@keyframes vocabulary-toast-out { to { opacity: 0; transform: translateY(-8px); } }
@media (prefers-reduced-motion: reduce) {
  .vocabulary-spinner, .diary-vocabulary-toast, .diary-vocabulary-toast.toast-closing { animation: none; }
}

@media (max-width: 767px) {
  .diary-vocabulary-toasts { top: calc(64px + env(safe-area-inset-top, 0px)); left: max(7.5vw, env(safe-area-inset-left, 0px), env(safe-area-inset-right, 0px)); right: max(7.5vw, env(safe-area-inset-left, 0px), env(safe-area-inset-right, 0px)); width: auto; }
}

.learning-section-heading { flex-wrap: wrap; }

/* 一覧・詳細: DOM とフォームを共用し、幅変更では再マウントしない。 */
.workspace-detail { display: none; }
.workspace-has-detail > .workspace-list { display: none; }
.workspace-has-detail > .workspace-detail { display: block; }
.settings-desktop-link { display: none; }
.workspace-empty { padding: 64px 24px; text-align: center; }
.workspace [aria-current="true"],
.workspace [aria-current="page"] { outline: 2px solid var(--accent-cta); outline-offset: -2px; background-color: var(--accent-cta-bg); }
.workspace button:focus-visible, .workspace a:focus-visible { outline: 2px solid var(--accent-cta); outline-offset: 2px; }

@media (min-width: 1440px) {
  .workspace {
    --list-width: 360px;
    display: grid;
    grid-template-columns: var(--list-width) minmax(0, 1fr);
    gap: 24px;
    max-width: 1600px;
    margin: 0 auto;
    padding: 0 32px;
    height: 100dvh;
  }
  .workspace-diary { --list-width: 320px; }
  .workspace-settings { --list-width: 280px; }
  .workspace > .workspace-list,
  .workspace > .workspace-detail { display: block; min-width: 0; overflow-y: auto; overscroll-behavior-y: contain; scrollbar-gutter: stable; }
  .workspace > .workspace-list { border-right: var(--border-width) solid var(--border-subtle); padding-right: 16px; }
  .workspace .screen { min-height: 100%; }
  .workspace .screen-content { max-width: 760px; }
  .workspace-list .screen-content { max-width: none; }
  .workspace .screen-padded,
  .workspace .sticky-header,
  .workspace .settings-save-bar { padding-left: 8px; padding-right: 8px; }
  .workspace-detail .screen-padded,
  .workspace-detail .sticky-header,
  .workspace-detail .settings-save-bar { padding-left: 24px; padding-right: 24px; }
  .workspace-list .sticky-header > .flex { flex-wrap: wrap; gap: 12px; }
  .workspace-list .card, .workspace-list .vocab-card { overflow-wrap: anywhere; }
  .workspace-detail > .screen > .screen-content > .sticky-header button[aria-label="戻る"] { display: none; }
  .workspace .settings-save-bar { bottom: 0; }
  .workspace-settings .settings-overview-only { display: none; }
  .workspace-settings .settings-desktop-link { display: flex; }
  .workspace-settings .workspace-list .card { text-align: left; padding: 12px; }
  .workspace-empty { display: grid; align-content: center; min-height: 60dvh; }
}