/* ============================================================
   VoiceBridge（ほんやくコンニャク） デザイントークン

   カラー: ほぼ白黒のグレースケール + インディゴのアクセント1色のみ
           （Linear/Notionのような、余白と質感で魅せるプロフェッショナルな配色）
   タイプ: 見出し・本文ともにIBM Plex Sans JP（過度な装飾を避け、太さと余白で個性を出す）
   余白のスケール: 4の倍数（4/8/12/16/20/24/32px）で統一。プレミアム路線のため通常よりやや広め
   影: ほぼ使わない。使う場合も極めて薄いもの1段階のみ
   角丸のスケール: sm=10px（入力・小ボタン）/ md=16px（カード）/ full=999px（丸ボタン・ピル）
   ============================================================ */

:root {
  --bg: #FAFAF9;
  --panel: #FFFFFF;
  --panel-raised: #F4F4F3;
  --accent: #3D4EE0;
  --accent-strong: #2C3ACB;
  --accent-soft: #E8EAFC;
  --teal: #2F9E63;
  --teal-soft: #E4F5EA;
  --text: #141414;
  --text-muted: #6B6B6B;
  --text-faint: #A3A3A0;
  --border: #E6E5E1;
  --danger: #D5432E;

  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;

  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-full: 999px;

  --shadow-sm: 0 1px 2px rgba(20, 20, 20, 0.05);
  --shadow-md: 0 8px 24px rgba(20, 20, 20, 0.10);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: 'IBM Plex Sans JP', 'Hiragino Sans', sans-serif;
  min-height: 100vh;
  display: flex;
  justify-content: center;
  padding: var(--space-8) var(--space-4) 64px;
  -webkit-font-smoothing: antialiased;
  overscroll-behavior-y: contain;
}

/* env()（セーフエリア）に対応した環境でだけ、ノッチ等の分の余白を追加する。
   対応していない環境でも上のpaddingが基本値として必ず効くようにしている */
@supports (padding: max(0px)) {
  body {
    padding-top: max(var(--space-8), env(safe-area-inset-top) + var(--space-4));
    padding-bottom: max(64px, env(safe-area-inset-bottom) + var(--space-6));
    padding-left: max(var(--space-4), env(safe-area-inset-left));
    padding-right: max(var(--space-4), env(safe-area-inset-right));
  }
}

.app {
  width: 100%;
  max-width: 520px;
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
  position: relative;
  padding: 0 var(--space-1) var(--space-8);
}

button, input, select {
  font-family: inherit;
}

button {
  -webkit-tap-highlight-color: transparent;
}

/* ---- Header ---- */
.app__header {
  text-align: center;
  position: sticky;
  top: 0;
  z-index: 10;
  padding: var(--space-4) 0 var(--space-3);
  background: rgba(250, 250, 249, 0.9);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}

.gadget-badge {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-5) var(--space-8);
  /* こんにゃくらしい、長方形のブロック。角は少しだけ丸め、辺はわずかに不揃いにして「ぷるん」とした質感を出す */
  border-radius: 10px 14px 12px 8px;
  /* こんにゃくらしい、灰色がかった半透明の茶色 */
  background: linear-gradient(155deg, #C7BCA2 0%, #A7987A 55%, #877656 100%);
  box-shadow: var(--shadow-md), inset 0 2px 0 rgba(255, 255, 255, 0.3);
  margin-bottom: var(--space-3);
  overflow: hidden;
}

/* こんにゃく特有の、表面に浮かぶ小さな斑点（まだら模様） */
.gadget-badge::before {
  content: "";
  position: absolute;
  top: 0; right: 0; bottom: 0; left: 0;
  background-image:
    radial-gradient(circle 2.4px at 14% 28%, rgba(50, 37, 18, 0.65), transparent 70%),
    radial-gradient(circle 2px at 28% 68%, rgba(50, 37, 18, 0.55), transparent 70%),
    radial-gradient(circle 2.4px at 48% 22%, rgba(50, 37, 18, 0.6), transparent 70%),
    radial-gradient(circle 2px at 60% 62%, rgba(50, 37, 18, 0.6), transparent 70%),
    radial-gradient(circle 2.4px at 76% 32%, rgba(50, 37, 18, 0.55), transparent 70%),
    radial-gradient(circle 2px at 86% 68%, rgba(50, 37, 18, 0.6), transparent 70%),
    radial-gradient(circle 2px at 38% 82%, rgba(50, 37, 18, 0.5), transparent 70%),
    radial-gradient(circle 2.2px at 20% 78%, rgba(50, 37, 18, 0.5), transparent 70%),
    radial-gradient(circle 1.8px at 68% 82%, rgba(50, 37, 18, 0.45), transparent 70%),
    radial-gradient(circle 1.8px at 90% 40%, rgba(50, 37, 18, 0.45), transparent 70%);
  pointer-events: none;
}

/* 半透明のゼリー質らしい、ぬめっとした照り */
.gadget-badge::after {
  content: "";
  position: absolute;
  top: -10%;
  left: 10%;
  width: 42%;
  height: 55%;
  background: linear-gradient(160deg, rgba(255, 255, 255, 0.4), rgba(255, 255, 255, 0));
  border-radius: 50%;
  transform: rotate(-15deg);
  pointer-events: none;
}

.app__title {
  font-family: 'M PLUS Rounded 1c', sans-serif;
  font-weight: 800;
  font-size: 1.7rem;
  letter-spacing: 0.02em;
  margin: 0;
  color: #FFFDF6;
  text-shadow: 0 2px 3px rgba(58, 44, 24, 0.4);
  position: relative;
  z-index: 1;
}

.app__tagline {
  margin: var(--space-4) 0 0;
  color: var(--text-muted);
  font-size: 0.95rem;
}

.header-note {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin: var(--space-2) 0 0;
}

.logout-link {
  color: var(--text-muted);
  text-decoration: underline;
}

.app-footer {
  text-align: center;
  font-size: 0.7rem;
  color: var(--text-faint);
  margin: var(--space-4) 0 0;
  padding-top: var(--space-4);
  border-top: 1px solid var(--border);
}

.setup-warning {
  background: rgba(213, 67, 46, 0.06);
  border: 1px solid rgba(213, 67, 46, 0.2);
  color: var(--danger);
  border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-4);
  font-size: 0.85rem;
  text-align: center;
}

/* ---- Setup card (voice sample + language pair) ---- */
.setup-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: var(--space-5);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.setup-card__row {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.setup-card__label {
  font-family: 'IBM Plex Sans JP', sans-serif;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-faint);
  letter-spacing: 0.03em;
}

.setup-card__divider {
  height: 1px;
  background: var(--border);
  margin: var(--space-1) 0;
}

.status-pill {
  padding: 3px var(--space-3);
  border-radius: var(--radius-full);
  background: var(--panel-raised);
  color: var(--text-muted);
  font-size: 0.72rem;
  font-weight: 600;
}

.status-pill--ok {
  background: var(--accent-soft);
  color: var(--accent-strong);
}

.record-duration-picker {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.record-duration-picker__label {
  font-size: 0.72rem;
  color: var(--text-muted);
  font-weight: 600;
}

.record-duration-picker__options {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
}

.duration-option {
  border: 1px solid var(--border);
  background: var(--panel-raised);
  color: var(--text-muted);
  border-radius: var(--radius-full);
  padding: 6px var(--space-3);
  font-size: 0.78rem;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease;
}

.duration-option.is-active {
  background: var(--text);
  color: var(--bg);
  border-color: var(--text);
}

.record-duration-picker__hint {
  margin: 0;
  font-size: 0.72rem;
  color: var(--text-muted);
}

.record-button {
  position: relative;
  overflow: hidden;
  background: var(--panel-raised);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: var(--space-3);
  color: var(--text);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: border-color 0.15s ease;
}

.record-button:active { opacity: 0.85; }

.record-button__progress {
  position: absolute;
  inset: 0;
  width: 0%;
  background: var(--accent-soft);
  transition: width 1s linear;
  z-index: 0;
}

.record-button__label {
  position: relative;
  z-index: 1;
}

.record-button.recording {
  background: #FBEAE6;
  border-color: rgba(213, 67, 46, 0.3);
  color: var(--danger);
}

.record-button--subtle {
  background: none;
  border: none;
  box-shadow: none;
  padding: 0;
  align-self: flex-start;
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--text-muted);
  text-decoration: underline;
}

.record-button--subtle:active { transform: none; }
.record-button--subtle:hover { color: var(--accent); }
.record-button--subtle.recording {
  background: none;
  color: var(--danger);
}

.record-status-text {
  margin: 0;
  font-size: 0.78rem;
  color: var(--text-muted);
  min-height: 1.1em;
}

/* ---- Language pair ---- */
.lang-bar {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: end;
  gap: var(--space-2);
}

.lang-bar__field {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  min-width: 0;
}

.lang-bar__field label {
  font-size: 0.72rem;
  color: var(--text-muted);
}

.lang-bar__field select {
  appearance: none;
  background-color: var(--panel-raised);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%236B6B6B' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
  background-size: 16px;
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: var(--space-2) var(--space-6) var(--space-2) var(--space-3);
  font-size: 0.92rem;
}

.lang-bar__field select:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }

.swap-button {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--text-muted);
  display: grid;
  place-items: center;
  cursor: pointer;
  margin-bottom: 3px;
  transition: background 0.15s ease, color 0.15s ease;
}

.swap-button:hover { background: var(--panel-raised); color: var(--text); }

/* ---- Conversation options (always visible, toggle switches) ---- */
.options-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: var(--space-5);
}

.options-card__title {
  font-family: 'IBM Plex Sans JP', sans-serif;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-faint);
  letter-spacing: 0.03em;
  margin: 0 0 var(--space-3);
}

/* ---- Voice tone selector ---- */
.tone-selector {
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--border);
  margin-bottom: var(--space-2);
}

.tone-selector__label {
  display: block;
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-bottom: var(--space-2);
}

.tone-selector__options {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2px;
  background: var(--panel-raised);
  border-radius: var(--radius-sm);
  padding: 2px;
}

.tone-option {
  border: none;
  background: transparent;
  color: var(--text-muted);
  border-radius: 8px;
  padding: var(--space-2) var(--space-1);
  font-size: 0.78rem;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease;
}

.tone-option.is-active {
  background: var(--panel);
  color: var(--text);
  box-shadow: var(--shadow-sm);
  font-weight: 600;
}

.options-card__body {
  display: flex;
  flex-direction: column;
}

.setting-toggle {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) 0;
  border-top: 1px solid var(--border);
  cursor: pointer;
}

.setting-toggle:first-child { border-top: none; }

.setting-toggle input {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}

.setting-toggle__switch {
  flex-shrink: 0;
  position: relative;
  width: 40px;
  height: 24px;
  border-radius: var(--radius-full);
  background: var(--border);
  transition: background 0.15s ease;
}

.setting-toggle__switch::after {
  content: "";
  position: absolute;
  top: 2px;
  left: 2px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: #FFFFFF;
  box-shadow: 0 1px 3px rgba(20, 20, 20, 0.25);
  transition: transform 0.15s ease, background 0.15s ease;
}

.setting-toggle input:checked + .setting-toggle__switch {
  background: var(--text);
}

.setting-toggle input:checked + .setting-toggle__switch::after {
  transform: translateX(16px);
}

.setting-toggle input:focus-visible + .setting-toggle__switch {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.setting-toggle input:disabled + .setting-toggle__switch { opacity: 0.4; }
.setting-toggle input:disabled ~ .setting-toggle__text { opacity: 0.45; }

.setting-toggle__text {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.setting-toggle__text strong {
  font-size: 0.86rem;
  font-weight: 600;
  color: var(--text);
}

.setting-toggle__text small {
  font-size: 0.76rem;
  color: var(--text-muted);
  line-height: 1.4;
}

/* ---- Stage (mic area) ---- */
.stage {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-6) var(--space-4) 0;
  position: relative;
}

.waveform {
  position: absolute;
  top: 0;
  display: flex;
  align-items: flex-end;
  gap: 6px;
  height: 40px;
  opacity: 0.45;
}

.waveform span {
  width: 4px;
  height: 0;
  background: var(--teal);
  border-radius: 2px;
  transition: height 0.2s ease;
}

.waveform.active span { height: 10px; animation: wave 0.9s ease-in-out infinite; }
.waveform.active span:nth-child(2) { animation-delay: 0.1s; }
.waveform.active span:nth-child(3) { animation-delay: 0.2s; }
.waveform.active span:nth-child(4) { animation-delay: 0.3s; }
.waveform.active span:nth-child(5) { animation-delay: 0.4s; }
.waveform.active span:nth-child(6) { animation-delay: 0.15s; }
.waveform.active span:nth-child(7) { animation-delay: 0.25s; }

@keyframes wave {
  0%, 100% { height: 10px; }
  50% { height: 34px; }
}

.mic-button {
  position: relative;
  width: 84px;
  height: 84px;
  border-radius: 50%;
  border: none;
  background: var(--text);
  color: var(--bg);
  display: grid;
  place-items: center;
  cursor: pointer;
  box-shadow: var(--shadow-md);
  transition: transform 0.1s ease, opacity 0.15s ease;
}

.mic-button::before,
.mic-button::after {
  content: "";
  position: absolute;
  border-radius: 50%;
  border: 1px solid var(--border);
  pointer-events: none;
}

.mic-button::before { top: -12px; right: -12px; bottom: -12px; left: -12px; }
.mic-button::after { top: -24px; right: -24px; bottom: -24px; left: -24px; border-color: var(--border); opacity: 0.6; }

.mic-button.listening::before,
.mic-button.listening::after {
  border-color: var(--accent);
  animation: sonar-ping 1.6s ease-out infinite;
}

.mic-button.listening::after { animation-delay: 0.4s; }

@keyframes sonar-ping {
  0% { transform: scale(0.9); opacity: 0.9; }
  100% { transform: scale(1.25); opacity: 0; }
}

.mic-button:active { transform: scale(0.96); }
.mic-button:disabled { opacity: 0.5; cursor: default; transform: none; }

.mic-button.listening {
  background: var(--accent);
  color: #FFFFFF;
}

.mic-button.processing {
  animation: mic-pulse 1s ease-in-out infinite;
}

@keyframes mic-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.55; }
}

.status-text {
  margin: 0;
  font-size: 0.85rem;
  color: var(--text-muted);
  text-align: center;
  min-height: 1.2em;
}

/* ---- Text input (alternative to voice) ---- */
.icon-button--camera { flex-shrink: 0; }

.text-input-row {
  display: flex;
  gap: var(--space-2);
  width: 100%;
  max-width: 380px;
}

.text-input {
  flex: 1;
  min-width: 0;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  padding: var(--space-2) var(--space-4);
  color: var(--text);
  font-size: 0.9rem;
}

.text-input:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }

.text-input-submit {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: none;
  background: var(--text);
  color: var(--bg);
  display: grid;
  place-items: center;
  cursor: pointer;
  transition: opacity 0.15s ease, transform 0.1s ease;
}

.text-input-submit:active { transform: scale(0.94); }

/* ---- Transcript (conversation history) ---- */
.latest-result {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: var(--space-4);
}

.latest-result__label {
  margin: 0;
  font-family: 'IBM Plex Sans JP', sans-serif;
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--text-faint);
  letter-spacing: 0.03em;
}

.transcript-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 var(--space-1);
}

.toggle-history-button {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  padding: var(--space-1) 0;
  transition: color 0.15s ease;
}

.toggle-history-button:hover { color: var(--text); }

.toggle-history-button__icon {
  flex-shrink: 0;
  transition: transform 0.2s ease;
}

.toggle-history-button[aria-expanded="true"] .toggle-history-button__icon {
  transform: rotate(-90deg);
}

.transcript-header__label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
}

.clear-history-button {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 0.75rem;
  text-decoration: underline;
  cursor: pointer;
  padding: 0;
}

.clear-history-button:hover { color: var(--danger); }

.transcript {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.transcript-empty {
  text-align: center;
  color: var(--text-muted);
  font-size: 0.85rem;
  padding: var(--space-8) var(--space-4);
  border: 1px dashed var(--border);
  border-radius: var(--radius-md);
  line-height: 1.6;
}

.bubble-pair {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  border-bottom: 1px solid var(--border);
  padding-bottom: var(--space-4);
}

.bubble-pair:last-child { border-bottom: none; padding-bottom: 0; }

.bubble {
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  font-size: 0.94rem;
  line-height: 1.5;
  max-width: 88%;
}

.bubble--source {
  align-self: flex-start;
  background: var(--panel-raised);
  color: var(--text);
  border-bottom-left-radius: var(--space-1);
}

.bubble--translated {
  align-self: flex-end;
  background: var(--accent-soft);
  color: var(--accent-strong);
  border-bottom-right-radius: var(--space-1);
}

.bubble-row {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.bubble-row--source { justify-content: flex-start; }
.bubble-row--translated { justify-content: flex-end; }

.play-button,
.copy-button {
  flex-shrink: 0;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--text-muted);
  display: grid;
  place-items: center;
  cursor: pointer;
  padding: 0;
  transition: background 0.15s ease, color 0.15s ease;
}

.play-button:hover, .copy-button:hover { background: var(--panel-raised); color: var(--text); }
.play-button:disabled { opacity: 0.3; cursor: not-allowed; }

.bubble-pair__footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: var(--space-1);
}

.bubble-pair__footer-left {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.voice-tag {
  display: inline-block;
  font-size: 0.68rem;
  font-weight: 600;
  padding: 2px var(--space-2);
  border-radius: var(--radius-full);
}

.voice-tag--cloned {
  background: var(--teal-soft);
  color: var(--teal);
}

.voice-tag--natural {
  background: var(--panel-raised);
  color: var(--text-muted);
}

.entry-timestamp {
  font-size: 0.7rem;
  color: var(--text-muted);
  opacity: 0.8;
}

.delete-entry-button {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 0.75rem;
  text-decoration: underline;
  cursor: pointer;
  padding: var(--space-2) 0;
}

.delete-entry-button:hover { color: var(--danger); }

/* ---- Error banner ---- */
.error-banner {
  background: rgba(194, 74, 54, 0.08);
  border: 1px solid rgba(194, 74, 54, 0.25);
  color: var(--danger);
  border-radius: var(--radius-md);
  padding: var(--space-2) var(--space-4);
  font-size: 0.85rem;
  text-align: center;
  animation: banner-in 0.2s ease;
}

@keyframes banner-in {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: translateY(0); }
}

.feature-unavailable-note {
  text-align: center;
  font-size: 0.72rem;
  color: var(--text-muted);
}

/* ---- Login / register screens ---- */
.login-screen {
  max-width: 320px;
  margin: 18vh auto 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  text-align: center;
}

.app__title--small { font-size: 1.35rem; margin-bottom: 0; }

.login-form {
  margin-top: var(--space-5);
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.login-form input {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: var(--space-3) var(--space-4);
  color: var(--text);
  font-size: 1rem;
}

.login-form input:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }

.login-form button {
  background: var(--text);
  border: none;
  border-radius: var(--radius-sm);
  padding: var(--space-3);
  color: var(--bg);
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  transition: opacity 0.15s ease;
}

.login-form button:active { opacity: 0.85; }

.login-error {
  color: var(--danger);
  font-size: 0.85rem;
}

.auth-switch-link {
  margin-top: var(--space-4);
  font-size: 0.8rem;
}

.auth-switch-link a {
  color: var(--teal);
  text-decoration: underline;
}

/* ============================================================
   ダークモード（[data-theme="dark"] が html要素に付与されると切り替わる）
   ============================================================ */
[data-theme="dark"] {
  --bg: #121212;
  --panel: #1A1A1A;
  --panel-raised: #222222;
  --accent: #6B78EE;
  --accent-strong: #8792F2;
  --accent-soft: #262A4D;
  --teal: #4FBE86;
  --teal-soft: #1D3A28;
  --text: #F2F2F0;
  --text-muted: #9C9C98;
  --text-faint: #6E6E6A;
  --border: #2C2C2A;
  --danger: #E8735C;
}

[data-theme="dark"] body {
  background: var(--bg);
}

[data-theme="dark"] .app__header {
  background: rgba(18, 18, 18, 0.9);
}

/* ============================================================
   Header tools (theme toggle / help)
   ============================================================ */
.header-tools {
  position: absolute;
  top: 0;
  right: 0;
  display: flex;
  gap: var(--space-2);
}

.icon-button {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--text-muted);
  display: grid;
  place-items: center;
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease;
}

.icon-button:hover { background: var(--panel-raised); color: var(--text); }

/* ============================================================
   Quick language pairs
   ============================================================ */
.quick-pairs {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.quick-pair-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  border: 1px solid var(--border);
  background: var(--panel-raised);
  color: var(--text);
  border-radius: var(--radius-full);
  padding: 5px var(--space-3);
  font-size: 0.76rem;
  cursor: pointer;
}

.quick-pair-chip--add {
  color: var(--text-muted);
  background: none;
  border-style: dashed;
}

.quick-pair-chip__remove {
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1;
  padding: 0 2px;
}

.quick-pair-chip__remove:hover { color: var(--danger); }

/* ============================================================
   Favorite phrases
   ============================================================ */
.favorites-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  width: 100%;
  max-width: 380px;
}

.favorite-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  border: 1px solid var(--border);
  background: var(--accent-soft);
  color: var(--accent-strong);
  border-radius: var(--radius-full);
  padding: 5px var(--space-3);
  font-size: 0.78rem;
  cursor: pointer;
}

.favorite-chip:disabled { opacity: 0.5; cursor: default; }

.favorite-chip__remove {
  color: var(--accent-strong);
  font-size: 0.9rem;
  line-height: 1;
  padding: 0 2px;
  opacity: 0.7;
}

.favorite-chip__remove:hover { opacity: 1; }

.favorite-button {
  flex-shrink: 0;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--text-muted);
  display: grid;
  place-items: center;
  cursor: pointer;
  padding: 0;
  transition: background 0.15s ease, color 0.15s ease;
}

.favorite-button:hover { background: var(--panel-raised); color: var(--text); }

/* ============================================================
   Tutorial overlay
   ============================================================ */
.tutorial-overlay {
  position: fixed;
  inset: 0;
  background: rgba(14, 20, 24, 0.55);
  display: none;
  place-items: center;
  padding: var(--space-4);
  z-index: 100;
}

/* [hidden]属性だけに頼ると、display指定のあるCSSルールに上書きされてしまうことがあるため、
   表示する時は明示的にこのクラスを付け外しする方式にしている */
.tutorial-overlay.is-visible {
  display: grid;
}

/* ============================================================
   Camera capture overlay (OCR)
   ============================================================ */
.camera-overlay {
  position: fixed;
  inset: 0;
  background: rgba(10, 10, 10, 0.85);
  display: none;
  place-items: center;
  padding: var(--space-4);
  z-index: 110;
}

.camera-overlay.is-visible {
  display: grid;
}

.camera-card {
  width: 100%;
  max-width: 420px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-3);
}

.camera-video {
  width: 100%;
  max-height: 60vh;
  border-radius: var(--radius-md);
  background: #000;
  object-fit: cover;
}

.camera-status-text {
  margin: 0;
  font-size: 0.82rem;
  color: #FFFFFF;
  text-align: center;
  min-height: 1.2em;
}

.camera-card__controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-8);
  width: 100%;
}

.camera-shutter-button {
  width: 68px;
  height: 68px;
  border-radius: 50%;
  border: 3px solid #FFFFFF;
  background: transparent;
  cursor: pointer;
  position: relative;
}

.camera-shutter-button::after {
  content: "";
  position: absolute;
  inset: 5px;
  border-radius: 50%;
  background: #FFFFFF;
  transition: transform 0.1s ease;
}

.camera-shutter-button:active::after { transform: scale(0.85); }

.camera-side-button {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: none;
  background: rgba(255, 255, 255, 0.12);
  color: #FFFFFF;
  display: grid;
  place-items: center;
  cursor: pointer;
}

.camera-side-button:hover { background: rgba(255, 255, 255, 0.22); }

.tutorial-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: var(--space-6);
  max-width: 360px;
  width: 100%;
  box-shadow: var(--shadow-md);
}

.tutorial-step h3 {
  font-family: 'IBM Plex Sans JP', sans-serif;
  font-size: 1.15rem;
  margin: 0 0 var(--space-3);
  color: var(--text);
}

.tutorial-step p {
  font-size: 0.9rem;
  line-height: 1.6;
  color: var(--text-muted);
  margin: 0;
}

.tutorial-card__nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: var(--space-6);
}

.tutorial-skip {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 0.8rem;
  cursor: pointer;
  padding: 0;
}

.tutorial-dots {
  display: flex;
  gap: 6px;
}

.tutorial-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--border);
}

.tutorial-dot--active { background: var(--accent); }

.tutorial-next {
  background: linear-gradient(155deg, var(--accent) 0%, var(--accent-strong) 100%);
  border: none;
  border-radius: var(--radius-full);
  padding: var(--space-2) var(--space-5);
  color: #FFFFFF;
  font-weight: 600;
  font-size: 0.85rem;
  cursor: pointer;
}
@media (max-width: 480px) {
  .app__title { font-size: 1.5rem; }
  .gadget-badge { padding: var(--space-3) var(--space-5); }
  .lang-bar { grid-template-columns: 1fr; }
  .swap-button { justify-self: center; }
  .bubble { max-width: 94%; }
}

/* ---- Accessibility ---- */
@media (prefers-reduced-motion: reduce) {
  .waveform.active span,
  .mic-button.processing,
  .mic-button.listening::before,
  .mic-button.listening::after,
  .error-banner {
    animation: none;
  }
}