/* ==========================================================================
   AiXcel 機能リファレンス (/features) 専用スタイル
   トークンは dictionary.css と同じ値を使う（同じ見え方に揃えるため）
   ========================================================================== */

:root {
  --f-teal: #21c4a6;
  --f-teal-dark: #024560;
  --f-teal-light: #e0f7f3;
  --f-amber-bg: #fef3c7;
  --f-amber-text: #92400e;
  --f-ink: #1f2937;
  --f-ink-2: #374151;
  --f-muted: #6b7280;
  --f-border: #e5e7eb;
  --f-surface: #f9fafb;
  --f-white: #ffffff;
  --f-shadow: 0 1px 3px rgba(0,0,0,.04);
  --f-shadow-md: 0 4px 12px rgba(2,69,96,.08);
}

.feat-container {
  max-width: 860px;
  margin: 0 auto;
  padding: 24px 20px 80px;
}

/* ========== Hero ========== */
.feat-hero {
  position: relative;
  background: rgb(11 27 43);
  border-radius: 24px;
  overflow: hidden;
  padding: 48px 28px;
  text-align: center;
  margin-bottom: 28px;
}
.feat-hero__glow {
  position: absolute;
  top: -80px; right: -80px;
  width: 300px; height: 300px;
  border-radius: 50%;
  background: rgba(33,196,166,.2);
  filter: blur(60px);
}
.feat-hero__eyebrow {
  position: relative;
  font-size: .72rem;
  letter-spacing: .18em;
  font-weight: 700;
  color: var(--f-teal);
  margin-bottom: 12px;
}
.feat-hero h1 {
  position: relative;
  color: #fff;
  font-size: 1.9rem;
  margin: 0 0 12px;
  line-height: 1.35;
}
.feat-hero__lead {
  position: relative;
  color: rgba(255,255,255,.78);
  font-size: .92rem;
  line-height: 1.8;
  margin: 0 0 24px;
}

/* ========== 検索 ========== */
.feat-search-wrap {
  position: relative;
  max-width: 520px;
  margin: 0 auto;
}
.feat-search-icon {
  position: absolute;
  left: 16px; top: 50%;
  transform: translateY(-50%);
  color: var(--f-muted);
  pointer-events: none;
}
.feat-search {
  width: 100%;
  padding: 14px 44px;
  border: none;
  border-radius: 999px;
  font-size: .95rem;
  color: var(--f-ink);
  background: #fff;
  outline: none;
  box-shadow: 0 4px 16px rgba(0,0,0,.18);
}
.feat-search::placeholder { color: #9ca3af; }
/* type="search" のブラウザ標準の ✕ を消す（自前の feat-search-clear と二重に出る） */
.feat-search::-webkit-search-cancel-button,
.feat-search::-webkit-search-decoration { -webkit-appearance: none; appearance: none; }
.feat-search-clear {
  position: absolute;
  right: 12px; top: 50%;
  transform: translateY(-50%);
  border: none;
  background: transparent;
  color: var(--f-muted);
  font-size: 1rem;
  cursor: pointer;
  padding: 6px;
  line-height: 1;
}

/* ========== カテゴリチップ ========== */
.feat-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 16px;
}
.feat-chip {
  padding: 7px 14px;
  border: 1.5px solid var(--f-border);
  border-radius: 999px;
  background: var(--f-white);
  color: var(--f-ink-2);
  font-size: .82rem;
  font-weight: 600;
  cursor: pointer;
  transition: all .15s;
}
.feat-chip:hover { border-color: var(--f-teal); color: var(--f-teal-dark); }
.feat-chip.is-active {
  background: var(--f-teal-dark);
  border-color: var(--f-teal-dark);
  color: #fff;
}

/* ========== 件数・すべて開く ========== */
.feat-stats {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: .82rem;
  color: var(--f-muted);
  margin-bottom: 20px;
}
.feat-stats span { color: var(--f-ink-2); font-weight: 700; }
.feat-expand-all {
  margin-left: auto;
  border: 1.5px solid var(--f-border);
  background: var(--f-white);
  border-radius: 999px;
  padding: 6px 14px;
  font-size: .78rem;
  font-weight: 600;
  color: var(--f-ink-2);
  cursor: pointer;
}
.feat-expand-all:hover { border-color: var(--f-teal); color: var(--f-teal-dark); }

/* ========== セクション ========== */
.feat-section { margin-bottom: 32px; }
.feat-section__title {
  font-size: 1.02rem;
  color: var(--f-teal-dark);
  margin: 0 0 12px;
  padding-left: 10px;
  border-left: 4px solid var(--f-teal);
  line-height: 1.4;
}

/* ========== 機能カード ========== */
.feat-card {
  background: var(--f-white);
  border: 1px solid var(--f-border);
  border-radius: 14px;
  margin-bottom: 10px;
  box-shadow: var(--f-shadow);
  overflow: hidden;
  scroll-margin-top: 20px;      /* アンカーで飛んだとき見出しが隠れない */
}
.feat-card[open] { box-shadow: var(--f-shadow-md); border-color: #cfe9e2; }
.feat-card__head {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  cursor: pointer;
  list-style: none;
}
.feat-card__head::-webkit-details-marker { display: none; }
.feat-card__headtext { flex: 1; min-width: 0; }
.feat-card__title {
  font-size: .95rem;
  font-weight: 700;
  color: var(--f-ink);
  margin-right: 8px;
}
.feat-card__summary {
  display: block;
  font-size: .82rem;
  color: var(--f-muted);
  line-height: 1.65;
  margin-top: 3px;
}
.feat-card__chev {
  color: var(--f-muted);
  font-size: 1.3rem;
  transition: transform .18s;
  flex-shrink: 0;
}
.feat-card[open] .feat-card__chev { transform: rotate(90deg); }

/* プラン表示は constants.PLAN_FEATURES から描画される（本文には書かない） */
.feat-badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 999px;
  background: var(--f-amber-bg);
  color: var(--f-amber-text);
  font-size: .68rem;
  font-weight: 700;
  vertical-align: 2px;
  white-space: nowrap;
}

/* ========== カード本文 ========== */
.feat-card__body {
  padding: 0 16px 16px;
  border-top: 1px solid var(--f-border);
  padding-top: 14px;
}
.feat-where {
  display: flex;
  gap: 10px;
  align-items: baseline;
  background: var(--f-surface);
  border-radius: 10px;
  padding: 9px 12px;
  margin-bottom: 12px;
}
.feat-where__label {
  font-size: .7rem;
  font-weight: 700;
  color: var(--f-teal-dark);
  background: var(--f-teal-light);
  border-radius: 5px;
  padding: 2px 7px;
  flex-shrink: 0;
}
.feat-where__value {
  font-size: .83rem;
  color: var(--f-ink-2);
  line-height: 1.7;
}
.feat-what {
  font-size: .88rem;
  color: var(--f-ink-2);
  line-height: 1.9;
  margin: 0 0 14px;
}
.feat-block { margin-bottom: 14px; }
.feat-block__title {
  font-size: .78rem;
  font-weight: 700;
  color: var(--f-muted);
  margin: 0 0 6px;
  letter-spacing: .04em;
}
.feat-how {
  margin: 0;
  padding-left: 1.3em;
  font-size: .85rem;
  color: var(--f-ink-2);
  line-height: 1.9;
}
.feat-how li { margin-bottom: 2px; }
.feat-notes {
  margin: 0;
  padding-left: 1.1em;
  font-size: .82rem;
  color: var(--f-ink-2);
  line-height: 1.85;
}
.feat-notes li { margin-bottom: 4px; }
.feat-related {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding-top: 10px;
  border-top: 1px dashed var(--f-border);
}
.feat-related__label {
  font-size: .72rem;
  font-weight: 700;
  color: var(--f-muted);
}
.feat-related a {
  font-size: .8rem;
  color: var(--f-teal-dark);
  text-decoration: none;
  border-bottom: 1px solid var(--f-teal-light);
}
.feat-related a:hover { border-bottom-color: var(--f-teal); }
.feat-permalink {
  display: inline-block;
  margin-top: 12px;
  font-size: .7rem;
  color: #b8c0c8;
  text-decoration: none;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
}
.feat-permalink:hover { color: var(--f-teal); }

/* ========== 空・フッター ========== */
.feat-empty {
  text-align: center;
  padding: 48px 20px;
  color: var(--f-muted);
  font-size: .9rem;
  line-height: 1.9;
}
.feat-foot {
  margin-top: 40px;
  padding: 20px;
  background: var(--f-surface);
  border-radius: 14px;
  font-size: .85rem;
  color: var(--f-ink-2);
  line-height: 1.9;
}
.feat-foot a { color: var(--f-teal-dark); font-weight: 600; }
.feat-foot__note {
  margin: 8px 0 0;
  font-size: .76rem;
  color: var(--f-muted);
}

/* ========== 検索ヒットの強調 ========== */
.feat-card.is-hit { border-color: var(--f-teal); }

@media (max-width: 640px) {
  .feat-container { padding: 16px 14px 60px; }
  .feat-hero { padding: 36px 20px; border-radius: 18px; }
  .feat-hero h1 { font-size: 1.5rem; }
  .feat-card__head { padding: 12px 14px; }
}

/* ========== ダークモード ========== */
@media (prefers-color-scheme: dark) {
  body.dark-mode .feat-card,
  body.dark-mode .feat-chip,
  body.dark-mode .feat-expand-all { background: #16212e; border-color: #26374a; }
  body.dark-mode .feat-card__title,
  body.dark-mode .feat-what,
  body.dark-mode .feat-how,
  body.dark-mode .feat-notes { color: #dbe4ec; }
}

/* 本文から辞典（/dictionary）へのリンク。
   下線だらけにしないよう、色は変えずに点線だけにしている */
.feat-term {
  color: inherit;
  text-decoration: none;
  border-bottom: 1px dotted var(--f-teal);
}
.feat-term:hover {
  color: var(--f-teal-dark);
  border-bottom-style: solid;
}

/* 控除額の設定によるロック。プランのロック（アンバー）と別物だと分かるよう色を変える */
.feat-badge--ded {
  background: var(--f-teal-light);
  color: var(--f-teal-dark);
}