/* =========================================================
   StartWith School — Online Course Site
   Design System: StartWith Inc. コーポレートサイトを継承
   モノトーン / Noto Sans JP / 余白で構造を作る
   ========================================================= */

/* ---------- Tokens ---------- */
:root {
  --color-paper: #ffffff;
  --color-ink: #0a0a0a;
  --color-text: #1a1a1a;
  --color-charcoal: #2a2a2a;
  --color-stone: #666666;
  --color-line: #d0d0d0;
  --color-line-light: #ececec;
  --color-mist: #f4f4f4;

  --font-jp: 'Noto Sans JP', sans-serif;

  --space-xs: 8px;
  --space-sm: 16px;
  --space-md: 32px;
  --space-lg: 64px;
  --space-xl: 96px;
  --space-2xl: 128px;

  --container-max: 1080px;
  --container-pad: 32px;
  --header-h: 72px;

  --tracking-loose: 0.18em;
  --tracking-mid: 0.08em;
  --tracking-tight: 0.04em;
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; scroll-padding-top: var(--header-h); }
body {
  font-family: var(--font-jp);
  color: var(--color-text);
  background: var(--color-paper);
  font-feature-settings: "palt";
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-size: 16px;
  line-height: 1.85;
  font-weight: 400;
  text-rendering: optimizeLegibility;
}
img, svg { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; transition: opacity .2s ease; }
a:hover { opacity: 0.65; }
a:focus-visible { outline: 2px solid var(--color-ink); outline-offset: 3px; }
/* details/summary：クリック時の青枠を出さない（キーボード操作時のみ枠を表示） */
summary { outline: none; }
summary:focus { outline: none; }
summary:focus-visible { outline: 2px solid var(--color-ink); outline-offset: -2px; }
ul, ol { list-style: none; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }
button { font-family: inherit; background: none; border: none; cursor: pointer; color: inherit; }
p, li { letter-spacing: 0.5px; }

/* ---------- Container ---------- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-pad);
}
.container-narrow { max-width: 840px; }

/* =========================================================
   Buttons
   ========================================================= */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-family: inherit;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.1em;
  line-height: 1;
  padding: 16px 32px;
  border: 1px solid var(--color-ink);
  color: var(--color-ink);
  background: transparent;
  transition: background .2s ease, color .2s ease, opacity .2s ease;
  white-space: nowrap;
  cursor: pointer;
}
.btn:hover { opacity: 1; }
.btn-primary { background: var(--color-ink); color: var(--color-paper); }
.btn-primary:hover { background: var(--color-charcoal); border-color: var(--color-charcoal); }
.btn-ghost { background: transparent; color: var(--color-ink); }
.btn-ghost:hover { background: var(--color-ink); color: var(--color-paper); }
.btn-lg { padding: 20px 44px; font-size: 15px; }
.btn-block { display: flex; width: 100%; }
.btn-arrow::after { content: "→"; font-size: 13px; }

.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: var(--space-md);
}

/* =========================================================
   Header
   ========================================================= */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--header-h);
  z-index: 100;
  background: rgba(255, 255, 255, 0);
  transition: background .25s ease, border-color .25s ease;
  border-bottom: 1px solid transparent;
}
.site-header.is-scrolled {
  background: rgba(255, 255, 255, 0.96);
  border-bottom-color: var(--color-line-light);
  backdrop-filter: saturate(180%) blur(8px);
  -webkit-backdrop-filter: saturate(180%) blur(8px);
}
.header-inner {
  height: 100%;
  width: 100%;
  padding: 0 var(--container-pad);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.site-logo {
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0.14em;
  color: var(--color-ink);
  white-space: nowrap;
}
.site-logo .logo-sub {
  font-size: 10px;
  letter-spacing: 0.18em;
  color: var(--color-stone);
  font-weight: 400;
  margin-left: 8px;
}
.header-nav-wrap { display: flex; align-items: center; gap: 36px; }
.site-nav .nav-list {
  display: flex;
  align-items: center;
  gap: 32px;
}
.site-nav .nav-list a {
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--color-charcoal);
  font-weight: 400;
  padding: 6px 0;
  display: inline-block;
}
.header-cta {
  font-size: 12px;
  letter-spacing: 0.12em;
  font-weight: 500;
  padding: 11px 22px;
}

.nav-toggle {
  display: none;
  width: 40px; height: 40px;
  position: relative;
}
.nav-toggle span {
  position: absolute;
  left: 8px; right: 8px;
  height: 1px;
  background: var(--color-ink);
  transition: transform .25s ease, opacity .2s ease, top .25s ease;
}
.nav-toggle span:nth-child(1) { top: 14px; }
.nav-toggle span:nth-child(2) { top: 20px; }
.nav-toggle span:nth-child(3) { top: 26px; }
.nav-toggle.is-open span:nth-child(1) { top: 20px; transform: rotate(45deg); }
.nav-toggle.is-open span:nth-child(2) { opacity: 0; }
.nav-toggle.is-open span:nth-child(3) { top: 20px; transform: rotate(-45deg); }

.mobile-nav {
  position: fixed;
  top: var(--header-h);
  left: 0; right: 0;
  background: #fff;
  border-top: 1px solid var(--color-line-light);
  border-bottom: 1px solid var(--color-line-light);
  transform: translateY(-12px);
  opacity: 0;
  pointer-events: none;
  transition: opacity .25s ease, transform .25s ease;
  z-index: 99;
}
.mobile-nav.is-open {
  transform: translateY(0);
  opacity: 1;
  pointer-events: auto;
}
.mobile-nav ul { padding: 12px 0; }
.mobile-nav li { border-bottom: 1px solid var(--color-line-light); }
.mobile-nav li:last-child { border-bottom: none; }
.mobile-nav a {
  display: block;
  padding: 18px var(--container-pad);
  font-size: 14px;
  letter-spacing: 0.14em;
  color: var(--color-ink);
}
.mobile-nav .mobile-cta { color: var(--color-ink); font-weight: 500; }

/* =========================================================
   Common section
   ========================================================= */
.section {
  padding: var(--space-xl) 0;
  position: relative;
}
.section + .section {
  border-top: 1px solid var(--color-line-light);
}
.section-num {
  font-size: 11px;
  letter-spacing: var(--tracking-loose);
  color: var(--color-stone);
  font-weight: 300;
  margin-bottom: 14px;
}
.section-title {
  font-size: 32px;
  font-weight: 300;
  letter-spacing: var(--tracking-tight);
  line-height: 1.5;
  color: var(--color-ink);
  margin-bottom: var(--space-md);
}
.section-sub {
  font-size: 14px;
  color: var(--color-stone);
  font-weight: 300;
  letter-spacing: var(--tracking-tight);
  margin-top: -16px;
  margin-bottom: var(--space-lg);
}
.mist { background: var(--color-mist); }

/* =========================================================
   Placeholder (画像はグレーボックス)
   ========================================================= */
.ph {
  background: var(--color-mist);
  border: 1px solid var(--color-line-light);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-stone);
  font-size: 11px;
  letter-spacing: 0.16em;
  font-weight: 400;
  overflow: hidden;
}
.ph::after { content: attr(data-label); }
.ph-16-9 { aspect-ratio: 16/9; }
.ph-4-3 { aspect-ratio: 4/3; }
.ph-4-5 { aspect-ratio: 4/5; }
.ph-1-1 { aspect-ratio: 1/1; }

/* 実サムネイル画像（プレースホルダ .ph と同じ枠に収める） */
.course-thumb img {
  display: block;
  width: 100%;
  aspect-ratio: 16/9;
  object-fit: cover;
  border: none;
  border-bottom: 1px solid var(--color-line-light);
}
.enroll-card .enroll-media {
  display: block;
  width: 100%;
  aspect-ratio: 16/9;
  object-fit: cover;
  border: none;
  border-bottom: 1px solid var(--color-line-light);
}
/* 紹介動画（無料公開）：サムネイル＋再生ボタン（クリックで別タブ再生） */
.enroll-video { position: relative; display: block; width: 100%; aspect-ratio: 16/9; overflow: hidden; background: var(--color-mist); border-bottom: 1px solid var(--color-line-light); }
.enroll-video img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; display: block; }
.enroll-video-play {
  position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%);
  width: 56px; height: 56px; border-radius: 50%;
  background: rgba(10, 10, 10, 0.82); color: #fff;
  display: flex; align-items: center; justify-content: center; font-size: 17px;
  transition: background .2s ease, transform .2s ease;
}
.enroll-video-play i { margin-left: 3px; }
.enroll-video:hover .enroll-video-play { background: var(--color-ink); transform: translate(-50%, -50%) scale(1.06); }
.enroll-video-label { font-size: 11px; letter-spacing: 0.08em; color: var(--color-stone); margin-bottom: 12px; }
.enroll-video-label i { margin-right: 6px; color: var(--color-ink); }

/* ヒーロー（下層ページ用・コンパクト） */
.hero-compact { padding-top: calc(var(--header-h) + 56px); padding-bottom: 24px; }
/* 一覧トップ：hero直下は適度に空け、CTA直上（帯の下）だけ詰める */
#workshops { padding-top: 56px; padding-bottom: 0; }

/* 一覧：検索・カテゴリーフィルター */
.catalog-toolbar { display: flex; flex-direction: column; gap: 18px; margin: 8px 0 24px; }
.catalog-search { position: relative; }
.catalog-search-icon {
  position: absolute; left: 16px; top: 50%; transform: translateY(-50%);
  width: 18px; height: 18px; color: var(--color-stone); pointer-events: none;
}
.catalog-search-input {
  width: 100%; box-sizing: border-box;
  padding: 14px 18px 14px 46px;
  font-family: var(--font-jp); font-size: 14px; letter-spacing: 0.02em;
  color: var(--color-ink); background: var(--color-paper);
  border: 1px solid var(--color-line); border-radius: 0;
  -webkit-appearance: none; appearance: none;
}
.catalog-search-input:focus { outline: none; border-color: var(--color-ink); }
.catalog-search-input:focus + .catalog-search-icon,
.catalog-search:focus-within .catalog-search-icon { color: var(--color-ink); }
.catalog-search-input::placeholder { color: var(--color-stone); }
.catalog-filters { display: flex; flex-wrap: wrap; gap: 10px; }
.filter-chip {
  font-family: var(--font-jp); font-size: 12px; letter-spacing: 0.06em;
  padding: 9px 16px; cursor: pointer;
  color: var(--color-charcoal); background: var(--color-paper);
  border: 1px solid var(--color-line); border-radius: 0;
  transition: border-color 0.2s ease, background 0.2s ease, color 0.2s ease;
}
.filter-chip:hover { border-color: var(--color-ink); }
.filter-chip.is-active { color: var(--color-paper); background: var(--color-ink); border-color: var(--color-ink); }
.catalog-count { font-size: 12px; letter-spacing: 0.06em; color: var(--color-stone); margin: 0 0 40px; }
.catalog-empty { text-align: center; padding: 72px 0; color: var(--color-stone); font-size: 14px; }

/* よくある質問：カテゴリー絞り込み */
.faq-group + .faq-group { margin-top: var(--space-lg); }
.faq-group[hidden] { display: none; }
.faq-item[hidden] { display: none; }

/* カテゴリー別ブロック（中身は .container で中央寄せ） */
.catalog-groups { display: flex; flex-direction: column; }
/* 先頭（検索直後）ブロックは上余白を詰める。2番目以降は点線＋広めの上余白 */
.cat-block { padding: 8px 0 64px; }
.cat-block[hidden] { display: none; }
.cat-block:not([hidden]) ~ .cat-block:not([hidden]) { border-top: 1px dotted var(--color-line); padding-top: 64px; }
/* 絞り込みで hidden にしたカード／ブロックを確実に隠す（.course-card の display:flex を上書き） */
.course-card[hidden] { display: none !important; }
.cat-block-head { margin-bottom: 28px; }
.cat-block-name { font-size: 20px; font-weight: 500; letter-spacing: 0.04em; color: var(--color-ink); }
.cat-block-desc { font-size: 13px; font-weight: 300; color: var(--color-charcoal); margin-top: 10px; line-height: 1.8; }
@media (max-width: 720px) {
  /* 先頭は上を詰め、2番目以降は点線の上下を同じ余白に */
  .cat-block { padding: 8px 0 44px; }
  .cat-block:not([hidden]) ~ .cat-block:not([hidden]) { padding-top: 44px; }
}

/* 料金：単一プランのセンタリング */
.plan-wrap-single { grid-template-columns: minmax(0, 420px); justify-content: center; }

/* 受講の流れ：ステップ一覧 */
.flow-list { list-style: none; margin-top: var(--space-md); border-top: 1px solid var(--color-line-light); }
.flow-step { display: flex; gap: 32px; padding: 30px 0; border-bottom: 1px solid var(--color-line-light); }
.flow-num { flex: 0 0 auto; min-width: 72px; font-size: 12px; letter-spacing: 0.16em; color: var(--color-stone); font-weight: 500; padding-top: 3px; }
.flow-title { font-size: 17px; font-weight: 500; letter-spacing: 0.02em; color: var(--color-ink); margin-bottom: 10px; }
.flow-desc { font-size: 14px; font-weight: 300; line-height: 1.9; color: var(--color-charcoal); }
@media (max-width: 640px) {
  .flow-step { flex-direction: column; gap: 8px; padding: 24px 0; }
  .flow-num { padding-top: 0; }
}

/* 講座内容：章タイトルの一覧（詳細ページ） */
.chapter-titles { list-style: none; }
.chapter-titles li { display: flex; gap: 24px; align-items: baseline; padding: 18px 2px; border-bottom: 1px solid var(--color-line-light); }
.ct-no { flex: 0 0 auto; min-width: 60px; font-size: 12px; letter-spacing: 0.08em; color: var(--color-stone); font-weight: 500; }
.ct-name { font-size: 15px; font-weight: 500; letter-spacing: 0.02em; color: var(--color-ink); line-height: 1.6; }

/* 講師写真 */
.instructor-img { width: 100%; aspect-ratio: 4/5; object-fit: cover; display: block; }
/* 講師プロフィール下のリンク（Linktree） */
.instructor-link {
  display: inline-flex; align-items: center; gap: 8px;
  margin-top: 22px;
  font-size: 13px; letter-spacing: 0.06em; color: var(--color-ink);
  border: 1px solid var(--color-line); padding: 11px 20px;
  transition: background .2s ease, color .2s ease, border-color .2s ease;
}
.instructor-link:hover { background: var(--color-ink); color: var(--color-paper); border-color: var(--color-ink); opacity: 1; }
.instructor-link i { font-size: 12px; }

/* =========================================================
   Hero (共通)
   ========================================================= */
.hero {
  padding-top: calc(var(--header-h) + 88px);
  padding-bottom: 96px;
  background: #f9f9f9;
}
.hero-mark {
  font-size: 11px;
  letter-spacing: 0.32em;
  color: var(--color-stone);
  font-weight: 400;
  margin-bottom: 28px;
}
.hero-title {
  font-size: 56px;
  font-weight: 200;
  letter-spacing: var(--tracking-tight);
  line-height: 1.38;
  color: var(--color-ink);
}
.hero-rule {
  width: 56px;
  height: 1px;
  background: var(--color-ink);
  margin: 36px 0 28px;
}
.hero-sub {
  font-size: 16px;
  font-weight: 300;
  line-height: 2.0;
  color: var(--color-charcoal);
  letter-spacing: 0.06em;
}

/* =========================================================
   Pain / target list (コーポレート踏襲)
   ========================================================= */
.pain-list {
  border-top: 1px solid var(--color-line-light);
  margin-top: var(--space-md);
}
.pain-list li {
  border-bottom: 1px solid var(--color-line-light);
  padding: 22px 0 22px 28px;
  position: relative;
  font-size: 16px;
  font-weight: 400;
  line-height: 1.85;
  color: var(--color-charcoal);
}
.pain-list li::before {
  content: "\f111";
  font-family: "Font Awesome 6 Free"; font-weight: 900;
  position: absolute;
  left: 3px; top: 32px;
  font-size: 8px; line-height: 1;
  color: var(--color-ink);
}
.pain-foot {
  margin-top: 36px;
  font-size: 16px;
  font-weight: 500;
  color: var(--color-ink);
  letter-spacing: var(--tracking-tight);
}

/* =========================================================
   Pillars / feature cards
   ========================================================= */
.pillars {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: var(--space-md);
}
.pillar {
  border: 1px solid var(--color-line-light);
  padding: 32px 28px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  background: #fff;
}
.pillar-num {
  font-size: 11px;
  letter-spacing: var(--tracking-loose);
  color: var(--color-stone);
  font-weight: 400;
}
.pillar-name {
  font-size: 18px;
  font-weight: 500;
  letter-spacing: var(--tracking-tight);
  color: var(--color-ink);
  line-height: 1.5;
}
.pillar-divider {
  width: 24px;
  height: 1px;
  background: var(--color-ink);
  margin: 4px 0;
  display: block;
}
.pillar-desc {
  font-size: 13px;
  font-weight: 300;
  line-height: 1.95;
  color: var(--color-charcoal);
}

/* =========================================================
   Course catalog (講座一覧)
   ========================================================= */
.catalog-group {
  padding: 48px 0;
  border-top: 1px solid var(--color-line-light);
}
.catalog-group:last-of-type { border-bottom: 1px solid var(--color-line-light); }
.catalog-head {
  display: flex;
  align-items: baseline;
  gap: 20px;
  margin-bottom: var(--space-md);
  flex-wrap: wrap;
}
.catalog-head-num {
  font-size: 11px;
  letter-spacing: var(--tracking-loose);
  color: var(--color-stone);
  font-weight: 400;
}
.catalog-head-name {
  font-size: 22px;
  font-weight: 400;
  letter-spacing: var(--tracking-tight);
  color: var(--color-ink);
  line-height: 1.4;
}
.catalog-head-desc {
  font-size: 13px;
  font-weight: 300;
  color: var(--color-stone);
  letter-spacing: 0.04em;
  width: 100%;
}

.course-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px 28px;
}
.course-grid.cols-2 { grid-template-columns: repeat(2, 1fr); }
.course-card {
  display: flex;
  flex-direction: column;
  color: inherit;
  background: var(--color-paper);
  border: 1px solid var(--color-line-light);
  overflow: hidden;
  transition: border-color 0.2s ease;
}
a.course-card:hover { opacity: 1; border-color: var(--color-ink); }
.course-thumb {
  width: 100%;
  position: relative;
}
.course-thumb .ph { width: 100%; aspect-ratio: 16/9; border: none; border-bottom: 1px solid var(--color-line-light); }
.course-badge {
  position: absolute;
  top: 12px; left: 12px;
  background: var(--color-ink);
  color: var(--color-paper);
  font-size: 10px;
  letter-spacing: 0.16em;
  font-weight: 500;
  padding: 5px 12px;
}
.course-body { display: flex; flex-direction: column; gap: 10px; padding: 20px 22px 22px; }
.course-cat {
  font-size: 11px;
  font-weight: 400;
  letter-spacing: 0.12em;
  color: var(--color-stone);
}
.course-name {
  font-size: 17px;
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--color-ink);
  line-height: 1.55;
}
a.course-card:hover .course-name { text-decoration: underline; text-underline-offset: 4px; }
.course-desc {
  font-size: 13px;
  font-weight: 300;
  line-height: 1.9;
  color: var(--color-charcoal);
}
.course-meta {
  display: flex;
  gap: 16px;
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--color-stone);
  font-weight: 400;
  margin-top: 2px;
  padding-top: 12px;
  border-top: 1px solid var(--color-line-light);
}
.course-meta .soon { color: var(--color-stone); }

/* =========================================================
   CTA band
   ========================================================= */
.cta-band {
  background: var(--color-ink);
  color: var(--color-paper);
  padding: var(--space-xl) 0;
  text-align: center;
}
.cta-band .cta-mark {
  font-size: 11px;
  letter-spacing: 0.32em;
  color: rgba(255,255,255,0.55);
  margin-bottom: 20px;
}
.cta-band .cta-title {
  font-size: 30px;
  font-weight: 200;
  letter-spacing: var(--tracking-tight);
  line-height: 1.5;
  color: var(--color-paper);
  margin-bottom: 18px;
}
.cta-band .cta-sub {
  font-size: 14px;
  font-weight: 300;
  line-height: 2.0;
  color: rgba(255,255,255,0.75);
  margin-bottom: 40px;
}
.cta-band .btn-row { justify-content: center; margin-top: 0; }
.cta-band .btn-primary { background: var(--color-paper); color: var(--color-ink); border-color: var(--color-paper); }
.cta-band .btn-primary:hover { opacity: 0.85; }
.cta-band .btn-ghost { color: var(--color-paper); border-color: rgba(255,255,255,0.5); }
.cta-band .btn-ghost:hover { background: var(--color-paper); color: var(--color-ink); border-color: var(--color-paper); }
.cta-band .cta-note {
  font-size: 12px;
  color: rgba(255,255,255,0.55);
  letter-spacing: 0.06em;
  margin-top: 24px;
}

/* =========================================================
   FAQ (コーポレート踏襲)
   ========================================================= */
.faq-list {
  border-top: 1px solid var(--color-line-light);
  margin-top: var(--space-md);
}
.faq-item { border-bottom: 1px solid var(--color-line-light); }
.faq-q {
  display: grid;
  grid-template-columns: 60px 1fr 30px;
  gap: 20px;
  align-items: center;
  padding: 26px 0;
  cursor: pointer;
  list-style: none;
  transition: opacity .2s ease;
}
.faq-q::-webkit-details-marker { display: none; }
.faq-q:hover { opacity: 0.7; }
.faq-q-mark {
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--color-stone);
  font-weight: 400;
}
.faq-q-text {
  font-size: 15px;
  font-weight: 500;
  color: var(--color-ink);
  letter-spacing: var(--tracking-tight);
  line-height: 1.7;
}
.faq-q-icon { position: relative; width: 16px; height: 16px; justify-self: end; }
.faq-q-icon::before,
.faq-q-icon::after {
  content: "";
  position: absolute;
  left: 50%; top: 50%;
  background: var(--color-ink);
  transform: translate(-50%, -50%);
  transition: transform .25s ease;
}
.faq-q-icon::before { width: 14px; height: 1px; }
.faq-q-icon::after  { width: 1px; height: 14px; }
.faq-item[open] .faq-q-icon::after { transform: translate(-50%, -50%) scaleY(0); }
.faq-a {
  display: grid;
  grid-template-columns: 60px 1fr 30px;
  gap: 20px;
  padding: 0 0 28px;
}
.faq-a-mark {
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--color-stone);
  font-weight: 400;
}
.faq-a p {
  font-size: 14px;
  font-weight: 400;
  line-height: 2.0;
  color: var(--color-charcoal);
  grid-column: 2;
}

/* =========================================================
   Breadcrumb
   ========================================================= */
.breadcrumb {
  padding-top: calc(var(--header-h) + 32px);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--color-stone);
}
.breadcrumb ol { display: flex; flex-wrap: wrap; gap: 8px; }
.breadcrumb li::after { content: "／"; margin-left: 8px; color: var(--color-line); }
.breadcrumb li:last-child::after { content: ""; }
.breadcrumb a { color: var(--color-stone); border-bottom: 1px solid transparent; }
.breadcrumb a:hover { border-bottom-color: var(--color-stone); opacity: 1; }
.breadcrumb li:last-child { color: var(--color-charcoal); }

/* =========================================================
   Course detail (講座詳細)
   ========================================================= */
.detail-hero { padding: calc(var(--header-h) + 40px) 0 var(--space-lg); background: #f9f9f9; }
.detail-hero-grid {
  display: grid;
  grid-template-columns: 1fr 400px;
  gap: 56px;
  align-items: start;
}
.detail-cat {
  font-size: 11px;
  letter-spacing: var(--tracking-loose);
  color: var(--color-stone);
  font-weight: 400;
  margin-bottom: 18px;
}
.detail-title {
  font-size: 38px;
  font-weight: 300;
  letter-spacing: var(--tracking-tight);
  line-height: 1.45;
  color: var(--color-ink);
  margin-bottom: 24px;
}
.detail-lead {
  font-size: 15px;
  font-weight: 300;
  line-height: 2.0;
  color: var(--color-charcoal);
  letter-spacing: 0.04em;
  margin-bottom: 28px;
}
.tag-row { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 8px; }
.tag {
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--color-charcoal);
  border: 1px solid var(--color-line);
  padding: 6px 14px;
  font-weight: 400;
}
.detail-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 32px;
  margin-top: 24px;
}
.detail-facts .fact { display: flex; align-items: baseline; gap: 10px; }
.detail-facts dt { font-size: 10px; letter-spacing: 0.14em; color: var(--color-stone); }
.detail-facts dd { font-size: 13px; color: var(--color-charcoal); font-weight: 500; letter-spacing: 0.04em; }

/* enroll card (sticky) */
.enroll-card {
  border: 1px solid var(--color-line);
  background: #fff;
  position: sticky;
  top: calc(var(--header-h) + 24px);
}
.enroll-card .ph { border: none; border-bottom: 1px solid var(--color-line-light); }
.enroll-body { padding: 28px 26px; display: flex; flex-direction: column; gap: 16px; }
.enroll-price { display: flex; align-items: baseline; gap: 8px; }
.enroll-price .amount { font-size: 34px; font-weight: 200; letter-spacing: 0.02em; color: var(--color-ink); }
.enroll-price .unit { font-size: 13px; color: var(--color-stone); font-weight: 400; }
.enroll-note { font-size: 12px; color: var(--color-stone); line-height: 1.8; letter-spacing: 0.04em; }
.enroll-list { display: flex; flex-direction: column; gap: 8px; border-top: 1px solid var(--color-line-light); padding-top: 16px; }
.enroll-list li {
  font-size: 12px; color: var(--color-charcoal); line-height: 1.7;
  padding-left: 20px; position: relative; letter-spacing: 0.02em;
}
.enroll-list li::before {
  content: "\f00c";
  font-family: "Font Awesome 6 Free"; font-weight: 900;
  position: absolute; left: 0; top: 5px;
  font-size: 10px; line-height: 1; color: var(--color-ink);
}

/* learn list (この講座で学べること) */
.learn-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px 40px;
  margin-top: var(--space-md);
  border-top: 1px solid var(--color-line-light);
  padding-top: var(--space-md);
}
.learn-grid li {
  font-size: 14px;
  line-height: 1.85;
  color: var(--color-charcoal);
  padding-left: 26px;
  position: relative;
  letter-spacing: 0.02em;
}
.learn-grid li::before {
  content: "\f00c";
  font-family: "Font Awesome 6 Free"; font-weight: 900;
  position: absolute;
  left: 0; top: 7px;
  font-size: 12px; line-height: 1;
  color: var(--color-ink);
}

/* curriculum accordion */
.curriculum { border-top: 1px solid var(--color-line); margin-top: var(--space-md); }
.chapter { border-bottom: 1px solid var(--color-line-light); }
.chapter-head {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 20px;
  align-items: center;
  padding: 22px 0;
  cursor: pointer;
  list-style: none;
}
.chapter-head::-webkit-details-marker { display: none; }
.chapter-head:hover { opacity: 0.7; }
.chapter-no {
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--color-stone);
  font-weight: 400;
  white-space: nowrap;
}
.chapter-name {
  font-size: 16px;
  font-weight: 500;
  letter-spacing: var(--tracking-tight);
  color: var(--color-ink);
  line-height: 1.5;
}
.chapter-count { font-size: 11px; color: var(--color-stone); letter-spacing: 0.08em; white-space: nowrap; }
.chapter-icon { position: relative; width: 14px; height: 14px; }
.chapter-icon::before, .chapter-icon::after {
  content: ""; position: absolute; left: 50%; top: 50%;
  background: var(--color-ink); transform: translate(-50%, -50%); transition: transform .25s ease;
}
.chapter-icon::before { width: 12px; height: 1px; }
.chapter-icon::after { width: 1px; height: 12px; }
.chapter[open] .chapter-icon::after { transform: translate(-50%, -50%) scaleY(0); }
.module-list { padding: 0 0 20px; }
.module-list li {
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 16px;
  padding: 12px 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--color-charcoal);
  border-top: 1px solid var(--color-line-light);
  letter-spacing: 0.02em;
}
.module-list li .m-id { font-size: 11px; color: var(--color-stone); letter-spacing: 0.06em; }

/* instructor */
.instructor-grid {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 48px;
  margin-top: var(--space-md);
  align-items: start;
}
.instructor-photo .ph { width: 100%; }
.instructor-name {
  font-size: 22px;
  font-weight: 400;
  letter-spacing: var(--tracking-tight);
  color: var(--color-ink);
  line-height: 1.4;
}
.instructor-name .ruby { font-size: 13px; font-weight: 300; color: var(--color-stone); margin-left: 8px; }
.instructor-role {
  font-size: 13px;
  color: var(--color-stone);
  letter-spacing: 0.06em;
  margin-top: 8px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--color-line-light);
  margin-bottom: 20px;
}
.instructor-text { font-size: 14px; line-height: 2.0; color: var(--color-charcoal); }

/* =========================================================
   Pricing (料金プラン)
   ========================================================= */
.plan-wrap {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-top: var(--space-md);
  align-items: start;
}
.plan {
  border: 1px solid var(--color-line-light);
  background: #fff;
  padding: 40px 36px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.plan.is-featured { border: 1.5px solid var(--color-ink); position: relative; }
.plan-flag {
  position: absolute;
  top: -1px; right: 28px;
  background: var(--color-ink);
  color: var(--color-paper);
  font-size: 10px;
  letter-spacing: 0.16em;
  font-weight: 500;
  padding: 6px 14px;
}
.plan-name {
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0.1em;
  color: var(--color-ink);
}
.plan-tagline { font-size: 12px; color: var(--color-stone); font-weight: 300; letter-spacing: 0.04em; margin-top: -12px; }
.plan-price { display: flex; align-items: baseline; gap: 6px; padding: 8px 0 4px; border-bottom: 1px solid var(--color-line-light); }
.plan-price .amount { font-size: 44px; font-weight: 200; letter-spacing: 0.01em; color: var(--color-ink); line-height: 1; }
.plan-price .unit { font-size: 13px; color: var(--color-stone); }
.plan-price .free { font-size: 32px; font-weight: 200; color: var(--color-ink); }
.plan-features { display: flex; flex-direction: column; gap: 12px; }
.plan-features li {
  font-size: 13px;
  line-height: 1.7;
  color: var(--color-charcoal);
  padding-left: 24px;
  position: relative;
  letter-spacing: 0.02em;
}
.plan-features li::before {
  content: "\f00c";
  font-family: "Font Awesome 6 Free"; font-weight: 900;
  position: absolute;
  left: 0; top: 5px;
  font-size: 12px; line-height: 1;
  color: var(--color-ink);
}
.plan-features li.off { color: var(--color-stone); }
.plan-features li.off::before { content: "\f00d"; color: var(--color-line); }
.plan .btn { margin-top: 8px; }
/* 申し込みボタンからのアンカー着地（固定ヘッダー分の余白） */
#plan { scroll-margin-top: 96px; }
/* PayPal 購読ボタン（プランカードの決済ブロック） */
.paypal-button-block { margin-top: 8px; min-height: 45px; }
.plan-pay-note {
  margin-top: 12px;
  font-size: 12px; line-height: 1.6;
  color: var(--color-stone);
  text-align: center;
}

/* comparison table */
.compare-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: var(--space-md);
  font-size: 13px;
}
.compare-table th, .compare-table td {
  padding: 18px 20px;
  border-bottom: 1px solid var(--color-line-light);
  text-align: left;
  vertical-align: middle;
}
.compare-table thead th {
  font-size: 12px;
  letter-spacing: 0.1em;
  font-weight: 500;
  color: var(--color-ink);
  border-bottom: 1px solid var(--color-line);
}
.compare-table thead th.col-plan { text-align: center; width: 22%; }
.compare-table tbody th {
  font-weight: 400;
  color: var(--color-charcoal);
  letter-spacing: 0.02em;
}
.compare-table td.cell { text-align: center; color: var(--color-charcoal); }
.compare-table .yes { color: var(--color-ink); font-weight: 500; }
.compare-table .no { color: var(--color-line); }
.compare-table .col-featured { background: var(--color-mist); }

/* =========================================================
   Footer
   ========================================================= */
.site-footer {
  border-top: 1px solid var(--color-line-light);
  padding: 20px 0 32px;
}
/* フッターの内容幅をヘッダー（全幅）に揃える */
.site-footer .container { max-width: none; }
/* フッター直前セクションの下余白（講座ページのRELATED等） */
main > .section:last-child { padding-bottom: var(--space-lg); }
.footer-top {
  display: flex;
  justify-content: space-between;
  gap: 32px;
  flex-wrap: wrap;
  padding-bottom: 40px;
}
/* コピーライト上の区切り線を画面幅いっぱいに */
.footer-bottom { border-top: 1px solid var(--color-line-light); padding: 20px 0; }
.footer-brand .footer-logo { font-size: 15px; font-weight: 500; letter-spacing: 0.14em; color: var(--color-ink); }
.footer-brand p { font-size: 12px; color: var(--color-stone); font-weight: 300; letter-spacing: 0.04em; margin-top: 10px; line-height: 1.9; }
.footer-links { display: flex; gap: 48px; flex-wrap: wrap; }
.footer-col-title { font-size: 10px; letter-spacing: 0.16em; color: var(--color-stone); margin-bottom: 14px; font-weight: 400; }
.footer-col ul { display: flex; flex-direction: column; gap: 10px; }
.footer-col a { font-size: 12px; color: var(--color-charcoal); letter-spacing: 0.04em; }
.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}
.footer-copy { font-size: 11px; letter-spacing: 0.14em; color: var(--color-stone); font-weight: 300; }
.footer-link { font-size: 11px; letter-spacing: 0.16em; color: var(--color-stone); font-weight: 400; border-bottom: 1px solid transparent; padding-bottom: 2px; }
.footer-link:hover { border-bottom-color: var(--color-ink); color: var(--color-ink); opacity: 1; }

/* =========================================================
   Responsive — Tablet (≤ 1023px)
   ========================================================= */
/* タブレット以下：ヘッダーはハンバーガーメニューに切り替え */
@media (max-width: 1200px) {
  .site-nav { display: none; }
  .header-cta { display: none; }
  .nav-toggle { display: block; }
}

@media (max-width: 1023px) {
  .hero-title { font-size: 44px; }
  .pillars { grid-template-columns: 1fr 1fr; }
  .course-grid { grid-template-columns: repeat(2, 1fr); }
  .detail-hero-grid { grid-template-columns: 1fr; gap: 40px; }
  .enroll-card { position: static; max-width: 460px; }
  .section-title { font-size: 28px; }
}

/* =========================================================
   Responsive — Mobile (≤ 767px)
   ========================================================= */
@media (max-width: 767px) {
  :root { --container-pad: 22px; --header-h: 60px; }
  body { font-size: 15px; }

  .hero { padding-top: calc(var(--header-h) + 56px); padding-bottom: 72px; }
  .hero-title { font-size: 32px; line-height: 1.42; }
  .hero-sub { font-size: 14px; }
  .hero-rule { margin: 28px 0 22px; }

  .section { padding: 72px 0; }
  .section-title { font-size: 24px; margin-bottom: 24px; }
  .section-sub { margin-top: -12px; margin-bottom: 36px; }

  .btn { padding: 15px 26px; font-size: 13px; }
  .btn-lg { padding: 17px 32px; font-size: 14px; }
  .btn-row { gap: 12px; }
  .btn-row .btn { flex: 1 1 auto; }

  .pain-list li { padding: 18px 0 18px 24px; font-size: 14px; }
  .pain-list li::before { top: 27px; }

  .pillars { grid-template-columns: 1fr; gap: 14px; }
  .pillar { padding: 24px 22px; }

  .catalog-group { padding: 36px 0; }
  .catalog-head-name { font-size: 19px; }
  .course-grid, .course-grid.cols-2 { grid-template-columns: 1fr; gap: 32px; }

  .cta-band .cta-title { font-size: 22px; }

  .detail-title { font-size: 26px; }
  .learn-grid { grid-template-columns: 1fr; gap: 12px; }
  .chapter-head { grid-template-columns: auto 1fr auto; gap: 12px; }
  .chapter-name { font-size: 14px; }
  .chapter-count { display: none; }
  .module-list li { grid-template-columns: 44px 1fr; gap: 10px; }

  .instructor-grid { grid-template-columns: 1fr; gap: 24px; }
  .instructor-photo { max-width: 220px; }

  .plan-wrap { grid-template-columns: 1fr; }
  .plan { padding: 32px 26px; }

  .compare-table { font-size: 12px; }
  .compare-table th, .compare-table td { padding: 14px 10px; }
  .compare-table thead th.col-plan { width: 26%; }

  .faq-q { grid-template-columns: 40px 1fr 24px; gap: 12px; padding: 22px 0; }
  .faq-q-text { font-size: 14px; }
  .faq-a { grid-template-columns: 40px 1fr; gap: 12px; }

  .footer-top { flex-direction: column; gap: 28px; }
  .footer-links { gap: 32px; }
}