/* ==========================================================================
   brief.css — 相談の下書き（brief.html 専用）
   - styles.css のトークン（:root）と detail-* 名前空間を前提に、追加分だけを定義する
   - 新規クラスはすべて `brf-` 接頭辞。styles.css は改変しない
   - 動きは transform / opacity のみ。prefers-reduced-motion で遷移を止める
   - 機構: 左の選択が右の「下書きの行」を確定させる。入力 DOM は fieldset 内に固定し、移動しない
   ========================================================================== */

/* --- 0. ヒーロー差分 ------------------------------------------------------- */
.detail-hero--brief { padding-bottom: clamp(40px, 6vw, 64px); }
.brf-hero-facts {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 22px;
}
.brf-hero-facts li {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: rgba(255, 255, 255, 0.82);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.brf-hero-facts li::before {
  content: "";
  width: 14px;
  height: 1px;
  background: var(--color-gold-timeline);
}

/* --- 1. 器（2 段組） ------------------------------------------------------- */
.brf { background: var(--bg-paper); }
.brf__inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-px);
}
.brf__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 40px;
  align-items: start;
}
@media (min-width: 1024px) {
  .brf__grid { grid-template-columns: minmax(0, 1fr) 400px; gap: 56px; }
  .brf-draft { position: sticky; top: 84px; }
}

/* --- 2. 分岐タブ（ラジオ・キーボードで操作できる） -------------------------- */
.brf-tabs { border: 0; margin: 0 0 26px; padding: 0; }
.brf-tabs__legend {
  padding: 0;
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-depth);
}
.brf-tabs__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}
@media (max-width: 639px) { .brf-tabs__list { grid-template-columns: minmax(0, 1fr); } }
.brf-tab { position: relative; }
.brf-tab input {
  position: absolute;
  opacity: 0;
  width: 1px;
  height: 1px;
  margin: 0;
  pointer-events: none;
}
.brf-tab span {
  display: block;
  padding: 14px 16px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
  background: var(--color-paper);
  cursor: pointer;
  transition: background var(--transition-base), border-color var(--transition-base), color var(--transition-base);
}
.brf-tab b {
  display: block;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.0625rem;
  letter-spacing: var(--tracking-display);
  color: var(--color-ink);
}
.brf-tab small {
  display: block;
  margin-top: 4px;
  font-size: 0.8125rem;
  line-height: 1.6;
  color: var(--color-depth);
}
.brf-tab span:hover { border-color: var(--color-indigo); }
.brf-tab input:checked + span {
  background: var(--color-navy);
  border-color: var(--color-navy);
}
.brf-tab input:checked + span b { color: #fff; }
.brf-tab input:checked + span small { color: rgba(255, 255, 255, 0.86); }
.brf-tab input:focus-visible + span { outline: 3px solid var(--color-indigo); outline-offset: 2px; }

/* --- 3. 設問 -------------------------------------------------------------- */
.brf-form__intro {
  margin: 0 0 22px;
  color: var(--color-depth);
  font-size: 0.9375rem;
  line-height: 1.8;
}
.brf-q-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 18px;
}
/* 非活性の分岐は隠す。クラスの display はブラウザ既定の [hidden] より詳細度が高いため、
   明示的に打ち消さないと 3 分岐すべてが並んでしまう（実測で発覚） */
.brf-q-list[hidden] { display: none !important; }
.brf-q {
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
  background: var(--color-paper);
  padding: 18px 20px 16px;
  transition: border-color var(--transition-base);
}
.brf-q.is-answered { border-color: rgba(12, 22, 38, 0.5); }
.brf-q__kicker {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: 0.18em;
  color: #7E621F;
}
.brf-q__kicker .k-label { color: #4E5D70; }
.brf-q__fs { border: 0; margin: 0; padding: 0; min-width: 0; }
.brf-q__text {
  padding: 0;
  margin: 0 0 12px;
  font-size: 1.0625rem;
  font-weight: 700;
  line-height: 1.5;
  color: var(--color-ink);
}
.brf-opts {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}
@media (max-width: 599px) { .brf-opts { grid-template-columns: minmax(0, 1fr); } }
.brf-opt { position: relative; }
.brf-opt input {
  position: absolute;
  opacity: 0;
  width: 1px;
  height: 1px;
  margin: 0;
  pointer-events: none;
}
.brf-opt span {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 44px;
  padding: 9px 12px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
  background: var(--bg-paper);
  color: var(--color-ink);
  font-size: 0.9375rem;
  line-height: 1.45;
  cursor: pointer;
  transition: background var(--transition-base), border-color var(--transition-base), color var(--transition-base);
}
.brf-opt span::before {
  content: "";
  flex: none;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  border: 1px solid var(--color-slate);
  background: #fff;
  transition: background var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base);
}
.brf-opt span:hover { border-color: var(--color-indigo); background: #fff; }
.brf-opt input:checked + span {
  background: var(--color-navy);
  border-color: var(--color-navy);
  color: #fff;
}
.brf-opt input:checked + span::before {
  background: var(--color-gold-timeline);
  border-color: var(--color-gold-timeline);
  box-shadow: inset 0 0 0 3px var(--color-navy);
}
.brf-opt input:focus-visible + span { outline: 3px solid var(--color-indigo); outline-offset: 2px; }

.brf-form__foot {
  margin: 22px 0 0;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}
.brf-form__status {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: var(--color-depth);
}
.brf-noscript {
  margin: 0 0 20px;
  padding: 12px 14px;
  border: 1px solid var(--color-line);
  border-left: 3px solid #7E621F;
  background: var(--color-paper);
  font-size: 0.9375rem;
  color: var(--color-ink);
}

/* --- 4. 下書き（右）: 選択で行が確定する ------------------------------------ */
.brf-draft {
  background: var(--color-paper);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
  padding: 26px 26px 22px;
}
.brf-draft__kicker {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: var(--tracking-kicker);
  color: #7E621F;
}
.brf-draft__title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.35rem;
  letter-spacing: var(--tracking-display);
  line-height: var(--leading-heading);
  color: var(--color-ink);
  margin: 0 0 6px;
}
.brf-draft__meta {
  margin: 0 0 18px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--color-depth);
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}
.brf-draft__rows {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--color-line);
}
/* 未確定の行は淡い罫線のまま。確定すると濃くなる（駒が帳面の行になる文法） */
.brf-row {
  display: grid;
  grid-template-columns: 7.5em minmax(0, 1fr);
  gap: 12px;
  align-items: baseline;
  padding: 11px 0;
  border-bottom: 1px solid var(--color-line);
  color: var(--color-slate);
  transition: color var(--transition-base), border-color var(--transition-base);
}
.brf-row.is-set { color: var(--color-ink); border-bottom-color: rgba(12, 22, 38, 0.28); }
.brf-row__key {
  font-size: 0.8125rem;
  font-weight: 700;
  font-family: var(--font-mono);
  letter-spacing: 0.04em;
}
.brf-row__val {
  font-size: 0.9375rem;
  line-height: 1.7;
  overflow-wrap: anywhere;
  opacity: 0.55;
  transform: translateY(2px);
  transition: opacity 0.28s ease, transform 0.28s cubic-bezier(0.22, 1, 0.36, 1);
}
.brf-row.is-set .brf-row__val { opacity: 1; transform: none; }
.brf-draft__hint {
  margin: 16px 0 0;
  font-size: 0.8125rem;
  line-height: 1.7;
  color: var(--color-depth);
}
.brf-draft__hint.is-ready { color: #7E621F; font-weight: 700; }

/* --- 5. モバイルの進捗帯 ---------------------------------------------------- */
.brf-bar {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 40;
  background: rgba(12, 22, 38, 0.96);
  color: #fff;
  border-top: 1px solid rgba(255, 255, 255, 0.16);
  padding: 10px var(--container-px);
  padding-bottom: max(10px, env(safe-area-inset-bottom));
  display: none;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  transform: translateY(100%);
  transition: transform 0.3s ease;
}
.brf-bar.is-visible { transform: translateY(0); }
.brf-bar[hidden] { display: none !important; }
.brf-bar__text {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: rgba(255, 255, 255, 0.88);
  display: flex;
  gap: 10px;
  align-items: baseline;
  min-width: 0;
}
.brf-bar__label {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.9375rem;
  letter-spacing: 0.04em;
  color: #fff;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.brf-bar__link {
  flex: none;
  color: #fff;
  font-size: 0.8125rem;
  font-weight: 700;
  text-decoration: none;
  border: 1px solid rgba(255, 255, 255, 0.68);
  border-radius: 999px;
  padding: 6px 12px;
}
@media (max-width: 1023px) {
  .brf-bar { display: flex; }
  body.brf-has-bar { padding-bottom: 64px; }
}

/* --- 6. 参照セクション ----------------------------------------------------- */
.brf-result { background: var(--color-fog); }
.brf-h3 {
  margin: 28px 0 10px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.125rem;
  letter-spacing: var(--tracking-display);
  color: var(--color-ink);
  display: flex;
  align-items: baseline;
  gap: 12px;
}
.brf-h3::before {
  content: attr(data-num);
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 0.6875rem;
  letter-spacing: 0.18em;
  color: #7E621F;
}
.brf-note {
  margin: 0 0 14px;
  font-size: 0.875rem;
  line-height: 1.75;
  color: var(--color-depth);
}
.brf-nearby, .brf-quotes, .brf-notes { list-style: none; margin: 0; padding: 0; }
.brf-nearby li {
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
  background: var(--color-paper);
  padding: 14px 16px;
}
.brf-nearby li + li { margin-top: 10px; }
.brf-nearby a {
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  font-weight: 700;
  font-size: 1rem;
  color: var(--color-ink);
  text-decoration: none;
}
.brf-nearby a::after { content: "→"; color: var(--color-indigo); }
.brf-nearby a:hover { color: var(--color-indigo); text-decoration: underline; text-underline-offset: 3px; }
.brf-nearby p {
  margin: 6px 0 0;
  font-size: 0.875rem;
  line-height: 1.7;
  color: var(--color-depth);
}
.brf-quotes li {
  border-left: 3px solid var(--color-line);
  padding: 4px 0 4px 14px;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--color-ink);
}
.brf-quotes li + li { margin-top: 12px; }
.brf-quotes cite {
  display: block;
  margin-top: 6px;
  font-style: normal;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
}
.brf-quotes cite a { color: var(--color-depth); }
.brf-notes { padding-left: 1.4em; list-style: disc; }
.brf-notes li {
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--color-ink);
}
.brf-notes li + li { margin-top: 6px; }
.brf-disclaimer {
  margin: 24px 0 0;
  padding: 12px 14px;
  border: 1px solid var(--color-line);
  background: var(--color-paper);
  font-size: 0.8125rem;
  line-height: 1.7;
  color: var(--color-depth);
}
.brf-share {
  margin: 16px 0 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}
.brf-share .button { min-height: 44px; padding: 10px 18px; font-size: 0.9375rem; }
.brf-share__msg {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: #7E621F;
  min-height: 1.2em;
}
.brf-details { margin: 12px 0 0; }
.brf-details summary {
  cursor: pointer;
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--color-indigo);
}
.brf-textarea {
  display: block;
  width: 100%;
  margin: 10px 0 0;
  padding: 12px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
  background: var(--color-paper);
  font-family: var(--font-body);
  font-size: 0.8125rem;
  line-height: 1.7;
  color: var(--color-ink);
  resize: vertical;
}

/* --- 7. ヘッダーの戻りリンク（狭い画面での縮小） ----------------------------- */
@media (max-width: 420px) {
  .detail-header__inner { gap: 8px; padding: 0 16px; }
  .detail-back-pill { font-size: 0.8125rem; padding: 6px 12px; min-height: 36px; }
}

/* --- 8. 動きの縮退・印刷 ---------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  .brf-row, .brf-row__val, .brf-q, .brf-opt span, .brf-opt span::before,
  .brf-tab span, .brf-bar { transition: none; }
  .brf-row__val { transform: none; }
}
@media print {
  .detail-header, .detail-cta, .detail-footer, .brf-form, .brf-bar, .brf-share, .brf-details, .skip-link { display: none !important; }
  .brf__grid { display: block; }
  .brf-draft { position: static; border-color: #999; }
  .brf-result { display: block !important; background: #fff; }
  .brf-result[hidden] { display: none !important; }
  .detail-hero { background: #fff; color: #000; }
  .detail-hero__title, .detail-hero__lead { color: #000; }
  .brf-hero-facts li { color: #333; }
}