/* 一水空 /program/ — カスタムスタイル
 * スコープ: #yk-program-main
 * Avada Builderは使わない — page-program.php テンプレートで呼び出し
 */

  :root {
    color-scheme: light;
    --ink: rgba(51,51,51,1);
    --muted: #5d6971;
    --paper: #fffdf8;
    --aqua: #b8e8e8;
    --aqua-strong: #1577aa;
    --line: rgba(38,74,82,0.16);
    --shadow: 0 24px 70px rgba(52,102,111,0.18);
    --radius: 8px;

    /* グループを2トーンに統合:
       カリキュラム系 → aqua-strong（青緑）
       上級・特別系   → インク（深みのあるダークスレート）
       入門・定期    → muted（落ち着いたグレイグリーン）
    */
    --tone-entry:   #1577aa;   /* 入門・定期 */
    --tone-program: #2d4a52;   /* 気神・風雅・君龍カリキュラム */
    --tone-elite:   #3d3a35;   /* プライベート・上級 */
    --tone-direct:  #1577aa;   /* 直伝 */
  }

  *, *::before, *::after { box-sizing: border-box; }

  html { scroll-behavior: smooth; }

  body {
    background:
      linear-gradient(180deg, rgba(184,232,232,0.15), transparent 28rem),
      var(--paper);
    font-family: YakuHanJP, "Noto Sans JP", "Hiragino Kaku Gothic ProN", "Yu Gothic", sans-serif;
    font-size: 18px;
    margin: 0; padding: 0;
    color: var(--ink);
    line-height: 2;
    font-feature-settings: 'palt' 1;
    font-kerning: auto;
  }

  h1, h2, h3 {
    font-family: YakuHanMP, 'DM Serif Display', "Noto Serif JP", "Hiragino Mincho ProN", Georgia, serif;
    font-feature-settings: 'palt' 1;
    font-kerning: auto;
    word-break: auto-phrase;
    overflow-wrap: break-word;
  }

  /* ── HERO ── */
  .yk-hero {
    padding: clamp(5rem, 12vw, 9rem) clamp(1rem, 5vw, 4rem) clamp(4rem, 8vw, 7rem);
    text-align: center;
    position: relative;
    background:
      radial-gradient(ellipse 80% 70% at 50% 0%, rgba(184,232,232,0.22) 0%, transparent 65%),
      var(--paper);
    border-bottom: 1px solid var(--line);
  }

  .yk-hero-eyebrow {
    display: block;
    font-size: 0.78rem;
    font-weight: 800;
    letter-spacing: 0.2em;
    color: var(--aqua-strong);
    text-transform: uppercase;
    margin-bottom: 1.1rem;
    font-family: YakuHanJP, "Noto Sans JP", sans-serif;
  }

  .yk-hero-title {
    font-size: clamp(2.2rem, 6vw, 4.2rem);
    color: var(--ink);
    margin: 0 0 1rem;
    line-height: 1.15;
    letter-spacing: 0;
  }

  .yk-hero-sub {
    font-size: clamp(0.9rem, 1.8vw, 1.05rem);
    color: var(--muted);
    margin: 0;
    font-family: YakuHanJP, "Noto Sans JP", sans-serif;
    line-height: 1.9;
  }

  /* ── WRAPPER ── */
  .yk-wrapper {
    max-width: 1440px;
    margin: 0 auto;
    padding: clamp(2.5rem, 6vw, 5rem) clamp(1rem, 4vw, 3rem) 6rem;
  }

  /* ── 受講の流れ ── */
  .yk-flow {
    max-width: 620px;
    margin: 0 auto 3.5rem;
    background: rgba(255,255,255,0.78);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 1.75rem 2rem;
    box-shadow: var(--shadow);
  }

  .yk-flow-title {
    font-size: 0.78rem;
    font-weight: 800;
    letter-spacing: 0.18em;
    color: var(--aqua-strong);
    text-transform: uppercase;
    margin: 0 0 1.1rem;
    font-family: YakuHanJP, "Noto Sans JP", sans-serif;
  }

  .yk-flow-steps {
    counter-reset: flow;
    list-style: none;
    padding: 0; margin: 0;
    display: flex;
    flex-direction: column;
    gap: 0;
  }

  .yk-flow-steps li {
    counter-increment: flow;
    font-size: 1rem;
    padding: 0.6rem 0 0.6rem 2.4rem;
    position: relative;
    border-bottom: 1px solid var(--line);
    color: var(--ink);
    line-height: 1.75;
  }

  .yk-flow-steps li:last-child { border-bottom: none; }

  .yk-flow-steps li::before {
    content: counter(flow);
    position: absolute; left: 0; top: 0.65rem;
    background: rgba(26,128,182,0.12);
    color: var(--aqua-strong);
    width: 1.55rem; height: 1.55rem;
    border-radius: 50%;
    font-size: 0.72rem; font-weight: 700;
    display: flex; align-items: center; justify-content: center;
    font-family: sans-serif;
    border: 1px solid rgba(26,128,182,0.25);
  }

  /* ── ACCORDION ── */
  .yk-group-accordion {
    margin-bottom: 1rem;
    border-radius: var(--radius);
    overflow: hidden;
    border: 1px solid var(--line);
    box-shadow: 0 4px 20px rgba(52,102,111,0.08);
  }

  .yk-group-summary {
    width: 100%;
    display: flex;
    align-items: center;
    gap: 0.9rem;
    padding: 1.1rem 1.5rem;
    border: none;
    cursor: pointer;
    text-align: left;
    font-family: YakuHanMP, 'DM Serif Display', "Noto Serif JP", serif;
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--ink);
    background: rgba(255,255,255,0.92);
    border-bottom: 1px solid var(--line);
    transition: background 0.15s;
    letter-spacing: 0;
  }

  .yk-group-summary:hover { background: rgba(184,232,232,0.12); }

  /* グループカラーを左ボーダーアクセントで示す（ベタ塗りなし） */
  .g-entry   .yk-group-summary { border-left: 3px solid rgba(21,119,170,0.55); }
  .g-regular .yk-group-summary { border-left: 3px solid rgba(21,119,170,0.55); }
  .g-direct  .yk-group-summary { border-left: 3px solid rgba(21,119,170,0.85); }
  .g-kishin  .yk-group-summary { border-left: 3px solid rgba(45,74,82,0.7); }
  .g-fuga    .yk-group-summary { border-left: 3px solid rgba(45,74,82,0.7); }
  .g-kunryu  .yk-group-summary { border-left: 3px solid rgba(45,74,82,0.7); }
  .g-private .yk-group-summary { border-left: 3px solid rgba(61,58,53,0.6); }

  .yk-group-tag {
    font-size: 0.68rem;
    font-family: YakuHanJP, "Noto Sans JP", sans-serif;
    font-weight: 700;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--muted);
    padding: 0.15rem 0.55rem;
    border-radius: 20px;
    border: 1px solid var(--line);
    white-space: nowrap;
    background: rgba(255,255,255,0.7);
  }

  .yk-group-name { flex: 1; }

  .yk-group-count {
    font-size: 0.75rem;
    font-family: YakuHanJP, "Noto Sans JP", sans-serif;
    font-weight: 400;
    color: var(--muted);
    white-space: nowrap;
  }

  .yk-chevron {
    font-size: 1rem;
    color: var(--muted);
    display: inline-block;
    transition: transform 0.25s;
    user-select: none;
    line-height: 1;
  }

  .yk-group-summary[aria-expanded="true"] .yk-chevron { transform: rotate(180deg); }

  /* group body */
  .yk-group-body {
    padding: 1.5rem 1rem 1.25rem;
    background: var(--paper);
  }
  .yk-group-body[hidden] { display: none; }

  @keyframes slideDown {
    from { opacity: 0; transform: translateY(-6px); }
    to   { opacity: 1; transform: translateY(0); }
  }
  .yk-group-body:not([hidden]) {
    animation: slideDown 0.22s ease;
  }

  /* ── CARD GRID ── */
  .yk-card-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    justify-content: center;
  }

  .yk-card {
    flex: 0 0 calc((100% - 2rem) / 3);
    background: rgba(255,255,255,0.78);
    border-radius: var(--radius);
    border: 1px solid var(--line);
    box-shadow: var(--shadow);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
  }

  /* カードが1枚だけのグループは全幅 */
  .yk-card:only-child {
    flex: 0 0 100%;
    max-width: 640px;
  }

  .yk-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 32px 80px rgba(52,102,111,0.22);
  }

  /* カードヘッダー */
  .yk-card-header {
    padding: 1.1rem 1.25rem 0.9rem;
    border-bottom: 1px solid var(--line);
    background: rgba(184,232,232,0.08);
    position: relative;
    line-height: 1.4;
    word-break: auto-phrase;
  }

  /* カリキュラム系カードは少し濃いトーン */
  .g-kishin .yk-card-header,
  .g-fuga   .yk-card-header,
  .g-kunryu .yk-card-header {
    background: rgba(45,74,82,0.05);
  }

  .g-private .yk-card-header {
    background: rgba(61,58,53,0.04);
  }

  /* 左ボーダーアクセントをカードにも */
  .g-entry   .yk-card,
  .g-regular .yk-card,
  .g-direct  .yk-card  { border-left: 2px solid rgba(21,119,170,0.4); }
  .g-kishin  .yk-card,
  .g-fuga    .yk-card,
  .g-kunryu  .yk-card  { border-left: 2px solid rgba(45,74,82,0.35); }
  .g-private .yk-card  { border-left: 2px solid rgba(61,58,53,0.3); }

  .yk-card-tag {
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.14em;
    color: var(--muted);
    text-transform: uppercase;
    display: block;
    margin-bottom: 0.45rem;
    font-family: YakuHanJP, "Noto Sans JP", sans-serif;
  }

  .yk-card-title {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--ink);
    line-height: 1.35;
    margin: 0;
    letter-spacing: 0;
  }

  .yk-card-subtitle {
    font-size: 0.92rem;
    color: var(--muted);
    margin: 0.4rem 0 0;
    font-family: YakuHanJP, "Noto Sans JP", sans-serif;
    line-height: 1.6;
  }

  .yk-card-body {
    padding: 1rem 1.25rem 1.1rem;
    flex: 1;
    display: flex;
    flex-direction: column;
    line-height: 1.65;
    word-break: auto-phrase;
  }

  .yk-section-label {
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.16em;
    color: var(--aqua-strong);
    text-transform: uppercase;
    margin: 0 0 0.3rem;
    font-family: YakuHanJP, "Noto Sans JP", sans-serif;
  }

  .g-kishin  .yk-section-label,
  .g-fuga    .yk-section-label,
  .g-kunryu  .yk-section-label { color: #2d4a52; }

  .g-private .yk-section-label { color: #3d3a35; }

  .yk-fit-list {
    list-style: none;
    padding: 0; margin: 0 0 0.75rem;
  }

  .yk-fit-list li {
    font-size: 1rem;
    padding: 0.15rem 0 0.15rem 1.3rem;
    position: relative;
    line-height: 1.6;
  }

  /* Font Awesomeなし: CSSで小さな三角チェック */
  .yk-fit-list li::before {
    content: "";
    position: absolute;
    left: 0.1rem;
    top: 0.7em;
    width: 0.42rem;
    height: 0.42rem;
    border-radius: 50%;
    background: var(--aqua-strong);
    opacity: 0.7;
  }

  .g-kishin  .yk-fit-list li::before,
  .g-fuga    .yk-fit-list li::before,
  .g-kunryu  .yk-fit-list li::before { background: #2d4a52; }

  .g-private .yk-fit-list li::before { background: #3d3a35; }

  .yk-desc {
    font-size: 1rem;
    color: var(--muted);
    line-height: 1.65;
    margin: 0 0 0.75rem;
  }

  .yk-divider {
    border: none;
    border-top: 1px solid var(--line);
    margin: 0 0 0.9rem;
  }

  .yk-price-row {
    display: flex;
    align-items: baseline;
    gap: 0.4rem;
    margin-bottom: 0.85rem;
  }

  .yk-price-label {
    font-size: 0.78rem;
    color: var(--muted);
    font-family: YakuHanJP, "Noto Sans JP", sans-serif;
  }

  .yk-price-value {
    font-size: 1.75rem;
    font-weight: 800;
    color: var(--aqua-strong);
    line-height: 1;
    font-family: YakuHanMP, 'DM Serif Display', "Noto Serif JP", serif;
  }

  .g-kishin  .yk-price-value,
  .g-fuga    .yk-price-value,
  .g-kunryu  .yk-price-value { color: #2d4a52; }

  .g-private .yk-price-value { color: #3d3a35; }

  .yk-price-period {
    font-size: 0.8rem;
    color: var(--muted);
    font-family: YakuHanJP, "Noto Sans JP", sans-serif;
  }

  .yk-cta-btn {
    display: block;
    width: 100%;
    background: transparent;
    color: var(--aqua-strong);
    text-align: center;
    padding: 0.72rem 1rem;
    font-size: 0.92rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    border: 1px solid rgba(21,119,170,0.45);
    border-radius: var(--radius);
    cursor: pointer;
    text-decoration: none;
    margin-top: auto;
    font-family: YakuHanJP, "Noto Sans JP", sans-serif;
    transition: background 0.15s, color 0.15s;
  }

  .yk-cta-btn:hover {
    background: var(--aqua-strong);
    color: #fff;
    border-color: var(--aqua-strong);
  }

  .g-kishin  .yk-cta-btn,
  .g-fuga    .yk-cta-btn,
  .g-kunryu  .yk-cta-btn {
    color: #2d4a52;
    border-color: rgba(45,74,82,0.4);
  }
  .g-kishin  .yk-cta-btn:hover,
  .g-fuga    .yk-cta-btn:hover,
  .g-kunryu  .yk-cta-btn:hover { background: #2d4a52; color: #fff; border-color: #2d4a52; }

  .g-private .yk-cta-btn { color: #3d3a35; border-color: rgba(61,58,53,0.35); }
  .g-private .yk-cta-btn:hover { background: #3d3a35; color: #fff; border-color: #3d3a35; }

  /* ── RESPONSIVE ── */
  /* モバイル（< 900px）: 1カラム、アコーディオン有効 */
  @media (max-width: 899px) {
    .yk-card { flex: 0 0 100%; min-width: 0; }
    .yk-card:only-child { max-width: 100%; }
    .yk-group-body { padding: 0.75rem 0.75rem 1rem; }
    .yk-card-grid { gap: 0.75rem; }
    .yk-wrapper { padding: clamp(1.5rem, 4vw, 2.5rem) clamp(0.75rem, 3vw, 1.5rem) 4rem; }
  }

  /* ── PC（>= 900px）: アコーディオン常時展開 ── */
  @media (min-width: 900px) {
    .yk-group-summary { pointer-events: none; }
    .yk-chevron { display: none; }
    .yk-group-count { display: none; }
    .yk-group-body[hidden] { display: block !important; }
  }