:root {
  /* palette — ink atelier with ember accent */
  --bg: oklch(16% 0.012 70);
  --bg-raised: oklch(20% 0.014 70);
  --surface: oklch(23% 0.016 72);
  --surface-2: oklch(27% 0.018 72);
  --line: oklch(34% 0.02 72);
  --text: oklch(94% 0.012 80);
  --text-dim: oklch(72% 0.016 78);
  --text-faint: oklch(56% 0.016 78);
  --accent: oklch(74% 0.16 58);
  --accent-soft: oklch(74% 0.16 58 / 0.14);
  --accent-2: oklch(80% 0.12 180);
  --danger: oklch(68% 0.16 25);

  /* code block（プレビュー本文）— テーマで上書き */
  --code-bg: oklch(12% 0.01 70);
  --code-text: var(--text);

  /* type */
  --serif: "Instrument Serif", Georgia, serif;
  --sans: "Zen Kaku Gothic New", system-ui, sans-serif;
  --text-display: clamp(2.4rem, 1.4rem + 3vw, 3.6rem);
  --text-lg: clamp(1.1rem, 0.95rem + 0.5vw, 1.35rem);

  /* space + motion */
  --space-edge: clamp(1.1rem, 0.5rem + 2.5vw, 3rem);
  --radius: 14px;
  --radius-sm: 9px;
  --dur: 320ms;
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--sans);
  background: var(--bg);
  color: var(--text);
  min-height: 100dvh;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  background-image:
    radial-gradient(120% 80% at 100% 0%, oklch(24% 0.03 58 / 0.6), transparent 60%),
    radial-gradient(90% 70% at 0% 100%, oklch(22% 0.025 200 / 0.4), transparent 55%);
  background-attachment: fixed;
}

.grain {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 1;
  opacity: 0.4;
  mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='3'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.5'/%3E%3C/svg%3E");
}

/* ============ masthead ============ */
.masthead {
  position: relative;
  z-index: 2;
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1.2rem;
  padding: clamp(1.4rem, 1rem + 2vw, 2.6rem) var(--space-edge) 1.2rem;
  border-bottom: 1px solid var(--line);
}

.masthead__brand { display: flex; align-items: center; gap: 0.9rem; }

.masthead__mark {
  width: 38px; height: 38px;
  border-radius: 50%;
  background: radial-gradient(circle at 32% 30%, var(--accent), oklch(48% 0.13 40) 70%);
  box-shadow: 0 0 0 1px var(--line), 0 8px 24px -8px var(--accent);
}

.masthead__title {
  font-family: var(--serif);
  font-size: var(--text-display);
  font-weight: 400;
  line-height: 0.95;
  letter-spacing: -0.01em;
}

.masthead__sub {
  font-size: 0.82rem;
  color: var(--text-faint);
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.modebar { display: flex; gap: 0.4rem; }

.modebar__btn {
  font-family: var(--sans);
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--text-dim);
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 100px;
  padding: 0.55rem 1.1rem;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease),
              background var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.modebar__btn:hover { color: var(--text); border-color: var(--text-faint); transform: translateY(-1px); }
.modebar__btn.is-active {
  color: var(--bg);
  background: var(--accent);
  border-color: var(--accent);
}
.modebar__kicker { font-family: var(--serif); font-style: italic; opacity: 0.7; }

/* ============ stage layout ============ */
.stage {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: clamp(1rem, 0.5rem + 2vw, 2.4rem);
  padding: clamp(1.4rem, 1rem + 2vw, 2.6rem) var(--space-edge) 3rem;
  align-items: start;
  max-width: 1280px;
  margin: 0 auto;
}

@media (max-width: 860px) {
  .stage { grid-template-columns: 1fr; }
}

/* ============ builder ============ */
.builder {
  background: var(--bg-raised);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: clamp(1.1rem, 0.8rem + 1vw, 1.8rem);
  display: flex;
  flex-direction: column;
  gap: 1.4rem;
  min-width: 0;
}

.panel { display: flex; flex-direction: column; gap: 1.3rem; }
.panel.is-hidden { display: none; }

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

/* ステップ区切り（① つくる → ② 出力設定 → ③ 除外） */
.step-rule {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-top: 0.2rem;
}
.step-rule::after {
  content: "";
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, var(--line), transparent);
}
.step-rule__no {
  font-family: var(--serif);
  font-style: italic;
  font-size: 1.1rem;
  line-height: 1;
  color: var(--accent);
}
.step-rule__label {
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-dim);
}
.step-rule--neg .step-rule__no { color: var(--danger); }

/* ヒーロー主題（最重要の入口を強調） */
.field--hero {
  background: linear-gradient(180deg, var(--surface-2), var(--surface));
  border: 1px solid var(--line);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius-sm);
  padding: 0.85rem 1rem 1rem;
  gap: 0.55rem;
}
.field__input--hero {
  font-size: 1.1rem;
  padding: 0.85rem 1rem;
}
.hint--top { margin-bottom: 0.1rem; }

.field__label {
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-dim);
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
}
.field__label em {
  font-family: var(--serif);
  font-style: italic;
  text-transform: none;
  letter-spacing: 0;
  font-size: 0.95rem;
  color: var(--text-faint);
}

.field__input {
  font-family: var(--sans);
  font-size: 1rem;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 0.75rem 0.9rem;
  width: 100%;
  resize: vertical;
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.field__input--area { line-height: 1.55; }

.field__row { display: flex; gap: 0.5rem; align-items: stretch; }
.field__row .field__input { flex: 1; }
.field__input::placeholder { color: var(--text-faint); }
.field__input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

/* chip groups */
.chips { display: flex; flex-direction: column; gap: 0.85rem; }

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

/* details/summary 化したグループ見出し（折りたたみ） */
.chip-group__title {
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-faint);
}
summary.chip-group__title {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  cursor: pointer;
  user-select: none;
  padding: 0.15rem 0;
  list-style: none;
  transition: color 160ms var(--ease);
}
summary.chip-group__title::-webkit-details-marker { display: none; }
summary.chip-group__title::before {
  content: "›";
  font-size: 1rem;
  line-height: 1;
  color: var(--text-faint);
  transition: transform 180ms var(--ease);
}
details.chip-group[open] > summary.chip-group__title::before { transform: rotate(90deg); }
summary.chip-group__title:hover { color: var(--text-dim); }
summary.chip-group__title:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 6px;
}
details.chip-group > .chip-group__row { padding-top: 0.5rem; }

.chip-group__count {
  margin-left: auto;
  min-width: 1.2rem;
  height: 1.2rem;
  padding: 0 0.35rem;
  display: inline-grid;
  place-items: center;
  font-family: var(--sans);
  font-size: 0.66rem;
  font-weight: 700;
  letter-spacing: 0;
  color: var(--bg);
  background: var(--accent);
  border-radius: 100px;
}
.chip-group__count:empty { display: none; }
.chip-group--neg .chip-group__count { background: var(--danger); color: oklch(98% 0 0); }
.chip-group--neg .chips--neg { max-height: 230px; overflow-y: auto; padding-right: 0.2rem; }

.chip-group__row { display: flex; flex-wrap: wrap; gap: 0.4rem; }

.chip {
  font-family: var(--sans);
  font-size: 0.85rem;
  color: var(--text-dim);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 100px;
  padding: 0.38rem 0.8rem;
  cursor: pointer;
  transition: color var(--dur) var(--ease), background var(--dur) var(--ease),
              border-color var(--dur) var(--ease), transform 180ms var(--ease);
}
.chip:hover { color: var(--text); border-color: var(--text-faint); transform: translateY(-1px); }
.chip[aria-pressed="true"] {
  color: var(--bg);
  background: var(--accent);
  border-color: var(--accent);
  font-weight: 500;
}
.chips--neg .chip[aria-pressed="true"] {
  background: var(--danger);
  border-color: var(--danger);
  color: oklch(98% 0 0);
}

.controls { display: flex; flex-wrap: wrap; gap: 0.8rem; }
.select { display: flex; flex-direction: column; gap: 0.4rem; flex: 1 1 140px; }
.select__label {
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-faint);
}
.select select {
  font-family: var(--sans);
  font-size: 0.92rem;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 0.6rem 0.7rem;
  cursor: pointer;
}
.select select:focus { outline: none; border-color: var(--accent); }
.select select:disabled { cursor: not-allowed; opacity: 0.55; }
.select.is-disabled { opacity: 0.6; }
.select__note {
  font-family: var(--serif);
  font-style: italic;
  font-size: 0.78rem;
  letter-spacing: 0;
  text-transform: none;
  color: var(--accent-2);
}

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

.actions { display: flex; gap: 0.6rem; padding-top: 0.2rem; }

.btn {
  font-family: var(--sans);
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  border-radius: 100px;
  padding: 0.6rem 1.1rem;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--text-dim);
  transition: color var(--dur) var(--ease), background var(--dur) var(--ease),
              border-color var(--dur) var(--ease), transform 180ms var(--ease);
}
.btn:hover { color: var(--text); border-color: var(--text-faint); transform: translateY(-1px); }
.btn:active { transform: translateY(0); }
.btn--ghost { flex: 1; }

.btn--translate {
  border-color: var(--accent-2);
  color: var(--accent-2);
  white-space: nowrap;
  font-weight: 700;
}
.btn--translate:hover {
  background: oklch(80% 0.12 180 / 0.14);
  border-color: var(--accent-2);
  color: var(--accent-2);
}
.btn--block { width: 100%; padding-block: 0.7rem; }

.btn--sort {
  width: 100%;
  border-color: var(--accent);
  color: var(--accent);
  font-weight: 700;
  letter-spacing: 0.02em;
}
.btn--sort:hover {
  background: var(--accent-soft);
  border-color: var(--accent);
  color: var(--accent);
}

.translate-row { display: flex; gap: 0.5rem; }
.translate-row .btn { flex: 1; }

.pack-bar { display: flex; flex-wrap: wrap; gap: 0.4rem; }
.pack-btn {
  font-family: var(--sans);
  font-size: 0.84rem;
  color: var(--text-dim);
  background: var(--surface);
  border: 1px dashed var(--line);
  border-radius: 100px;
  padding: 0.4rem 0.85rem;
  cursor: pointer;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease),
              background var(--dur) var(--ease), transform 180ms var(--ease);
}
.pack-btn:hover {
  color: var(--bg);
  background: var(--accent-2);
  border-color: var(--accent-2);
  border-style: solid;
  transform: translateY(-1px);
}
.pack-btn--adult { color: oklch(78% 0.14 12); border-color: oklch(50% 0.12 12); }
.pack-btn--adult:hover { background: oklch(62% 0.18 12); border-color: oklch(62% 0.18 12); color: oklch(98% 0 0); }

.pack-btn--neg { color: var(--danger); border-color: oklch(45% 0.1 25); }
.pack-btn--neg:hover { background: var(--danger); border-color: var(--danger); color: oklch(98% 0 0); }

.negative__head { display: flex; align-items: center; justify-content: space-between; gap: 0.6rem; }

.hint { font-size: 0.72rem; color: var(--text-faint); line-height: 1.5; }

.switch {
  display: flex; align-items: center; gap: 0.5rem;
  font-size: 0.82rem; color: var(--text-dim); cursor: pointer;
  user-select: none;
}
.switch input { width: 16px; height: 16px; accent-color: var(--accent); cursor: pointer; }
.switch em {
  font-family: var(--serif); font-style: italic; color: var(--text-faint); font-size: 0.8rem;
}

.btn.is-loading {
  pointer-events: none;
  color: transparent;
  position: relative;
}
.btn.is-loading::after {
  content: "";
  position: absolute;
  inset: 0;
  margin: auto;
  width: 14px; height: 14px;
  border: 2px solid var(--accent-2);
  border-top-color: transparent;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
@media (prefers-reduced-motion: reduce) {
  .btn.is-loading::after { animation: none; }
}

/* ============ preview ============ */
.preview {
  position: sticky;
  top: 1.2rem;
  background: linear-gradient(180deg, var(--surface), var(--bg-raised));
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: clamp(1.1rem, 0.8rem + 1vw, 1.6rem);
  display: flex;
  flex-direction: column;
  gap: 1rem;
  min-width: 0;
  box-shadow: 0 30px 60px -40px oklch(0% 0 0 / 0.7);
}
@media (max-width: 860px) { .preview { position: static; } }

.preview__head { display: flex; align-items: center; justify-content: space-between; }
.preview__tag {
  font-family: var(--serif);
  font-style: italic;
  font-size: 1.25rem;
  color: var(--accent);
}

.btn--copy {
  background: var(--accent);
  color: var(--bg);
  border-color: var(--accent);
  font-weight: 700;
}
.btn--copy:hover { background: oklch(80% 0.16 58); border-color: oklch(80% 0.16 58); color: var(--bg); }

.preview__body {
  font-family: "SF Mono", ui-monospace, Menlo, monospace;
  font-size: 0.92rem;
  line-height: 1.7;
  color: var(--code-text);
  background: var(--code-bg);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 1rem;
  min-height: 180px;
  white-space: pre-wrap;
  word-break: break-word;
}
.preview__body:empty::before {
  content: "ここに生成されたプロンプトが表示されます。";
  color: var(--text-faint);
  font-family: var(--sans);
}
.preview__body .neg-line { color: var(--danger); display: block; margin-top: 0.6rem; }

.preview__meta {
  font-size: 0.76rem;
  color: var(--text-faint);
  letter-spacing: 0.04em;
  min-height: 1.2em;
}

/* ============ history ============ */
.history { border-top: 1px solid var(--line); padding-top: 0.9rem; display: flex; flex-direction: column; gap: 0.6rem; }
.history__head {
  display: flex; align-items: center; justify-content: space-between;
  font-size: 0.74rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--text-faint);
}
.btn--mini { padding: 0.3rem 0.7rem; font-size: 0.78rem; }
.btn--mini:hover { color: var(--accent); border-color: var(--accent); }

.history__list { list-style: none; display: flex; flex-direction: column; gap: 0.4rem; max-height: 240px; overflow-y: auto; overflow-x: hidden; min-width: 0; }
.history__item {
  display: flex; align-items: center; gap: 0.6rem;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 0.5rem 0.7rem;
  cursor: pointer;
  transition: border-color var(--dur) var(--ease), transform 160ms var(--ease);
}
.history__item:hover { border-color: var(--text-faint); transform: translateX(2px); }
.history__body { flex: 1; min-width: 0; display: flex; flex-direction: column; gap: 0.1rem; }
.history__name {
  font-size: 0.84rem; color: var(--text); font-weight: 500;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.history__time { font-size: 0.7rem; color: var(--text-faint); }
.history__badge {
  flex: none;
  font-family: var(--serif); font-style: italic; font-size: 0.78rem; color: var(--accent-2);
}
.history__acts { display: flex; gap: 0.1rem; flex: none; }
.history__act {
  background: none; border: none; color: var(--text-faint); cursor: pointer;
  font-size: 0.95rem; line-height: 1; padding: 0.25rem 0.35rem; border-radius: 6px;
  transition: color 160ms var(--ease), background 160ms var(--ease);
}
.history__act:hover { color: var(--accent); background: var(--surface-2); }
.history__act:last-child:hover { color: var(--danger); }

.history__io { display: flex; gap: 0.3rem; }
.history__save { display: flex; gap: 0.5rem; }
.history__save .field__input { flex: 1; padding: 0.5rem 0.7rem; font-size: 0.86rem; }
.history__save .btn--copy { flex: none; white-space: nowrap; }
.history__empty { font-size: 0.8rem; color: var(--text-faint); padding: 0.4rem 0; }

/* ============ footer + toast ============ */
.footer {
  position: relative; z-index: 2;
  display: flex; flex-wrap: wrap; justify-content: space-between; gap: 0.6rem;
  padding: 1.4rem var(--space-edge);
  border-top: 1px solid var(--line);
  font-size: 0.76rem; color: var(--text-faint); letter-spacing: 0.04em;
}

.toast {
  position: fixed; bottom: 1.6rem; left: 50%;
  z-index: 10;
  background: var(--accent);
  color: var(--bg);
  font-weight: 700; font-size: 0.9rem;
  padding: 0.7rem 1.3rem;
  border-radius: 100px;
  box-shadow: 0 16px 40px -12px oklch(0% 0 0 / 0.6);
  opacity: 0;
  transform: translate(-50%, 12px);
  pointer-events: none;
  transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.toast.is-show { opacity: 1; transform: translate(-50%, 0); }

@media (prefers-reduced-motion: reduce) {
  * { transition-duration: 1ms !important; scroll-behavior: auto; }
}

/* ============ masthead right cluster + tools ============ */
.masthead__right {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  flex-wrap: wrap;
}
.masthead__tools { display: flex; gap: 0.4rem; }
.tool-btn {
  font-family: var(--sans);
  font-size: 0.92rem;
  color: var(--text-dim);
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 100px;
  min-width: 40px;
  height: 40px;
  padding: 0 0.75rem;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease),
              background var(--dur) var(--ease), transform 180ms var(--ease);
}
.tool-btn:hover {
  color: var(--text);
  border-color: var(--text-faint);
  transform: translateY(-1px);
}
.tool-btn--cmd {
  font-family: var(--serif);
  font-style: italic;
  font-size: 0.95rem;
  letter-spacing: 0.02em;
}

/* ============ preview actions ============ */
.preview__actions { display: flex; align-items: center; gap: 0.4rem; }

/* ============ insight / quality meter ============ */
.insight {
  display: flex;
  align-items: center;
  gap: 0.95rem;
  padding: 0.85rem 0.95rem;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
}
.insight__ring {
  position: relative;
  flex: none;
  width: 58px;
  height: 58px;
  display: grid;
  place-items: center;
}
.insight__ring svg { transform: rotate(-90deg); }
.insight__track {
  fill: none;
  stroke: var(--line);
  stroke-width: 6;
}
.insight__bar {
  fill: none;
  stroke: var(--accent);
  stroke-width: 6;
  stroke-linecap: round;
  transition: stroke-dashoffset var(--dur) var(--ease);
}
.insight__pct {
  position: absolute;
  font-family: var(--serif);
  font-size: 1.15rem;
  color: var(--text);
  line-height: 1;
}
.insight__pct small { font-size: 0.62rem; color: var(--text-faint); }
.insight__main { flex: 1; min-width: 0; display: flex; flex-direction: column; gap: 0.35rem; }
.insight__top { display: flex; align-items: baseline; justify-content: space-between; gap: 0.5rem; }
.insight__label {
  font-size: 0.68rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-faint);
}
.insight__grade {
  font-family: var(--serif);
  font-style: italic;
  font-size: 0.95rem;
  color: var(--accent);
}
.insight__axes { display: flex; flex-wrap: wrap; gap: 0.3rem 0.55rem; }
.insight__axis {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  font-size: 0.74rem;
  color: var(--text-faint);
}
.insight__axis.is-on { color: var(--text-dim); }
.insight__dot { color: var(--text-faint); font-size: 0.72rem; }
.insight__axis.is-on .insight__dot { color: var(--accent); }
.insight__tip {
  font-size: 0.74rem;
  color: var(--text-dim);
  line-height: 1.5;
}
.insight__tip-key { color: var(--accent); font-weight: 700; }
.insight__note {
  font-size: 0.72rem;
  color: var(--text-faint);
  line-height: 1.5;
  padding-top: 0.1rem;
  border-top: 1px dashed var(--line);
  margin-top: 0.1rem;
}
.insight__warn {
  font-size: 0.72rem;
  line-height: 1.5;
  color: var(--danger);
  font-weight: 500;
}

/* ワードパックの大人向け折りたたみ（pack-bar 内で改行して全幅） */
.chip-group--packs-adult { flex-basis: 100%; margin-top: 0.15rem; }
.chip-group--packs-adult > .pack-bar { padding-top: 0.5rem; }
.chip-group__count--muted {
  background: var(--surface-2);
  color: var(--text-dim);
}

/* 履歴の書式バッジ */
.history__fmt {
  flex: none;
  font-size: 0.62rem;
  letter-spacing: 0.03em;
  color: var(--text-faint);
  border: 1px solid var(--line);
  border-radius: 100px;
  padding: 0.05rem 0.4rem;
  white-space: nowrap;
}

/* ============ command palette (⌘K) ============ */
.cmdk {
  position: fixed;
  inset: 0;
  z-index: 20;
  display: grid;
  place-items: start center;
  padding-top: 14vh;
}
.cmdk[hidden] { display: none; }
.cmdk__backdrop {
  position: absolute;
  inset: 0;
  background: oklch(8% 0.01 70 / 0.55);
  backdrop-filter: blur(3px);
  opacity: 0;
  transition: opacity var(--dur) var(--ease);
}
.cmdk.is-open .cmdk__backdrop { opacity: 1; }
.cmdk__panel {
  position: relative;
  width: min(540px, 92vw);
  background: var(--bg-raised);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 40px 80px -30px oklch(0% 0 0 / 0.7);
  overflow: hidden;
  transform: translateY(-10px) scale(0.98);
  opacity: 0;
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}
.cmdk.is-open .cmdk__panel { transform: translateY(0) scale(1); opacity: 1; }
.cmdk__search {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.9rem 1rem;
  border-bottom: 1px solid var(--line);
}
.cmdk__icon {
  font-family: var(--serif);
  font-style: italic;
  color: var(--accent);
  font-size: 1.1rem;
}
.cmdk__input {
  flex: 1;
  font-family: var(--sans);
  font-size: 1rem;
  color: var(--text);
  background: transparent;
  border: none;
  outline: none;
}
.cmdk__input::placeholder { color: var(--text-faint); }
.cmdk__list {
  list-style: none;
  max-height: 50vh;
  overflow-y: auto;
  padding: 0.4rem;
}
.cmdk__item {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  padding: 0.6rem 0.7rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  color: var(--text-dim);
}
.cmdk__item.is-active { background: var(--accent-soft); color: var(--text); }
.cmdk__item-icon {
  flex: none;
  width: 1.5rem;
  text-align: center;
  font-size: 0.95rem;
  color: var(--accent);
}
.cmdk__item.is-active .cmdk__item-icon { color: var(--accent); }
.cmdk__item-label { flex: 1; font-size: 0.92rem; }
.cmdk__item-hint {
  flex: none;
  font-family: var(--serif);
  font-style: italic;
  font-size: 0.85rem;
  color: var(--text-faint);
}
.cmdk__empty { padding: 1rem 0.8rem; color: var(--text-faint); font-size: 0.88rem; }

@media (prefers-reduced-motion: reduce) {
  .cmdk__backdrop, .cmdk__panel, .insight__bar { transition: none !important; }
}

/* ============ ④ Light「和紙」テーマ ============ */
[data-theme="light"] {
  --bg: oklch(95.5% 0.012 88);
  --bg-raised: oklch(97.5% 0.008 88);
  --surface: oklch(93% 0.012 88);
  --surface-2: oklch(89% 0.016 86);
  --line: oklch(83% 0.02 86);
  --text: oklch(26% 0.02 60);
  --text-dim: oklch(42% 0.02 62);
  --text-faint: oklch(56% 0.022 64);
  --accent: oklch(56% 0.17 45);
  --accent-soft: oklch(56% 0.17 45 / 0.12);
  --accent-2: oklch(50% 0.11 200);
  --danger: oklch(53% 0.19 27);
  /* 墨色のコードブロックを和紙の上に置く（意図的なコントラスト） */
  --code-bg: oklch(24% 0.014 65);
  --code-text: oklch(94% 0.012 80);
}
[data-theme="light"] body {
  background-image:
    radial-gradient(120% 80% at 100% 0%, oklch(88% 0.04 70 / 0.55), transparent 60%),
    radial-gradient(90% 70% at 0% 100%, oklch(90% 0.03 200 / 0.4), transparent 55%);
}
[data-theme="light"] .grain { opacity: 0.16; mix-blend-mode: multiply; }
[data-theme="light"] .masthead__mark {
  background: radial-gradient(circle at 32% 30%, var(--accent), oklch(46% 0.14 38) 70%);
  box-shadow: 0 0 0 1px var(--line), 0 8px 24px -10px var(--accent);
}
[data-theme="light"] .preview {
  background: linear-gradient(180deg, var(--bg-raised), var(--surface));
  box-shadow: 0 30px 60px -42px oklch(40% 0.02 60 / 0.4);
}
[data-theme="light"] .cmdk__backdrop { background: oklch(60% 0.02 70 / 0.35); }
[data-theme="light"] .toast { color: oklch(97% 0.008 88); }
[data-theme="light"] .modebar__btn.is-active,
[data-theme="light"] .chip[aria-pressed="true"],
[data-theme="light"] .btn--copy { color: oklch(97% 0.008 88); }
[data-theme="light"] .pack-btn:hover,
[data-theme="light"] .pack-btn--neg:hover,
[data-theme="light"] .pack-btn--adult:hover { color: oklch(97% 0.008 88); }