/* ============================================================
       CSS 変数（トップページと共通）
    ============================================================ */
    :root {
      --color-bg:          #fafafa;
      --color-surface:     #ffffff;
      --color-surface-alt: #f4f6f8;
      --color-coral:       #ff7f6e;
      --color-coral-light: #fff0ee;
      --color-mint:        #4ecdc4;
      --color-mint-light:  #e8faf9;
      --color-text:        #2d3142;
      --color-text-muted:  #6b7280;
      --color-border:      #e5e7eb;
      --font-en:  'Plus Jakarta Sans', sans-serif;
      --font-ja:  'Noto Sans JP', sans-serif;
      --container: 1000px;
      --container-lg: 1400px;
      --radius-sm: 8px;
      --radius-md: 16px;
      --radius-lg: 24px;
      --shadow-sm: 0 1px 4px rgba(0,0,0,.06);
      --shadow-md: 0 4px 20px rgba(0,0,0,.08);
      --shadow-lg: 0 12px 40px rgba(0,0,0,.12);
      --transition: .3s cubic-bezier(.4,0,.2,1);
    }

    *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
    html { scroll-behavior: smooth; }
    body { font-family: var(--font-ja); background: var(--color-bg); color: var(--color-text); line-height: 1.7; overflow-x: hidden; }
    img  { display: block; max-width: 100%; height: auto; }
    a    { color: inherit; text-decoration: none; }
    ul   { list-style: none; }

    .container { width: min(var(--container), 100% - 48px); margin-inline: auto; }
.container-lg { width: min(var(--container-lg), 100% - 48px); margin-inline: auto; }

    /* ============================================================
       ナビゲーション
    ============================================================ */
    .nav {
      position: fixed; top: 0; left: 0; right: 0; z-index: 100;
      background: rgba(255,255,255,.9);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--color-border);
      box-shadow: var(--shadow-sm);
    }
    .nav__inner { display: flex; align-items: center; justify-content: space-between; height: 64px; }
    .nav__logo { font-family: var(--font-en); font-weight: 800; font-size: 1.25rem; color: var(--color-text); }
    .nav__logo span { color: var(--color-coral); }
    .nav__back {
      display: inline-flex; align-items: center; gap: 8px;
      font-size: .875rem; font-weight: 600; color: var(--color-text-muted);
      transition: color var(--transition), gap var(--transition);
    }
    .nav__back:hover { color: var(--color-coral); gap: 12px; }

    /* ============================================================
       ヒーロー（プロジェクトバナー）
    ============================================================ */
    .project-hero {
      padding-top: 64px;
      background: linear-gradient(135deg, #fff8f7 0%, #f0fffe 100%);
      border-bottom: 1px solid var(--color-border);



    }


    .project-hero__inner {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 64px;
      align-items: center;
      padding: 64px 0;
    }
    .project-hero__tag {
      display: inline-block;
      background: var(--color-coral);
      color: #fff;
      font-size: .75rem;
      font-weight: 700;
      padding: 4px 14px;
      border-radius: 99px;
      letter-spacing: .05em;
      margin-bottom: 16px;
    }
    .project-hero__title {
      font-family: var(--font-en);
      font-size: clamp(1.8rem, 4vw, 2.8rem);
      font-weight: 800;
      line-height: 1.2;
      color: var(--color-text);
      margin-bottom: 16px;
    }
    .project-hero__subtitle {
      font-size: 1rem;
      color: var(--color-text-muted);
      margin-bottom: 32px;
      line-height: 1.7;
    }
    .meta-list { display: flex; flex-wrap: wrap; gap: 16px; }
    .meta-item { display: flex; flex-direction: column; gap: 2px; }
    .meta-item__label { font-size: .7rem; font-weight: 700; text-transform: uppercase; letter-spacing: .1em; color: var(--color-coral); font-family: var(--font-en); }
    .meta-item__value { font-size: .9rem; font-weight: 600; color: var(--color-text); }

    .project-hero__img {
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-lg);
      overflow: hidden;
      aspect-ratio: 16/10;
    }
    .project-hero__img img { width: 100%; height: 100%; object-fit: cover; }

    /* ============================================================
       本文エリア
    ============================================================ */
    .project-body { padding: 80px 0; }

    .section-block { margin-bottom: 64px; }
    .section-block:last-child { margin-bottom: 0; }

    .block-label {
      display: inline-flex; align-items: center; gap: 10px;
      font-family: var(--font-en); font-size: .8rem; font-weight: 700;
      letter-spacing: .12em; text-transform: uppercase;
      color: var(--color-coral); margin-bottom: 16px;
    }
    .block-label::before {
      content: ''; display: block; width: 24px; height: 2px;
      background: var(--color-coral); border-radius: 99px;
    }
    .block-title {
      font-family: var(--font-en); font-size: clamp(1.4rem, 3vw, 1.9rem);
      font-weight: 800; color: var(--color-text); margin-bottom: 20px; line-height: 1.3;
    }
    .block-text {
      font-size: .95rem; color: var(--color-text-muted); line-height: 1.85;
      max-width: 720px;
    }
    .block-text + .block-text { margin-top: 16px; }

    /* 2カラムレイアウト */
    .two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: start; }
    .two-col--reverse { direction: rtl; }
    .two-col--reverse > * { direction: ltr; }

    /* 画像ブロック */
    .img-block { border-radius: var(--radius-md); overflow: hidden; box-shadow: var(--shadow-md); }
    .img-block img { width: 100%; height: auto; object-fit: cover; }
    .img-block--tall img { aspect-ratio: 3/4; }
    .img-block--wide img { aspect-ratio: 16/9; }

    .img-caption { font-size: .78rem; color: var(--color-text-muted); margin-top: 8px; text-align: center; }

    /* 課題・解決策カード */
    .challenge-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; margin-top: 8px; }
    .challenge-card {
      background: var(--color-surface); border: 1px solid var(--color-border);
      border-radius: var(--radius-md); padding: 24px;
      box-shadow: var(--shadow-sm);
    }
    .challenge-card__icon { font-size: 1.5rem; margin-bottom: 12px; }
    .challenge-card__title { font-weight: 700; font-size: .95rem; color: var(--color-text); margin-bottom: 8px; }
    .challenge-card__text { font-size: .85rem; color: var(--color-text-muted); line-height: 1.7; }

    /* 成果指標 */
    .result-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-top: 8px; }
    .result-card {
      background: linear-gradient(135deg, var(--color-coral-light), var(--color-mint-light));
      border-radius: var(--radius-md); padding: 28px 20px; text-align: center;
    }
    .result-card__num { font-family: var(--font-en); font-size: 2.2rem; font-weight: 800; color: var(--color-coral); line-height: 1; }
    .result-card__label { font-size: .8rem; color: var(--color-text-muted); margin-top: 6px; }

    /* ツールタグ */
    .tool-list { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 8px; }
    .tool-chip {
      display: inline-flex; align-items: center; gap: 6px;
      padding: 6px 16px; border-radius: 99px;
      background: var(--color-surface); border: 1px solid var(--color-border);
      font-size: .82rem; font-weight: 600; color: var(--color-text);
      box-shadow: var(--shadow-sm);
    }
    .tool-chip i { color: var(--color-coral); }

    /* スクリーンショットギャラリー */
    .screenshot-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; margin-top: 8px; }
    .screenshot-grid--3 { grid-template-columns: repeat(3, 1fr); }

    /* CTA */
    .project-cta {
      background: var(--color-text);
      border-radius: var(--radius-lg);
      padding: 48px;
      display: flex; align-items: center; justify-content: space-between; gap: 32px;
      flex-wrap: wrap;
    }
    .project-cta__text h3 { font-family: var(--font-en); font-size: 1.4rem; font-weight: 800; color: #fff; margin-bottom: 6px; }
    .project-cta__text p  { font-size: .88rem; color: rgba(255,255,255,.6); }
    .btn {
      display: inline-flex; align-items: center; gap: 8px;
      padding: 14px 28px; border-radius: 99px; font-weight: 700; font-size: .9rem;
      cursor: pointer; transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
    }
    .btn:hover { transform: translateY(-2px); }
    .btn--primary { background: var(--color-coral); color: #fff; box-shadow: 0 4px 16px rgba(255,127,110,.35); }
    .btn--primary:hover { background: #e86d5c; box-shadow: 0 8px 24px rgba(255,127,110,.4); }
    .btn--ghost { background: rgba(255,255,255,.1); color: #fff; border: 1px solid rgba(255,255,255,.2); }
    .btn--ghost:hover { background: rgba(255,255,255,.2); }

    /* ============================================================
       前後ナビゲーション
    ============================================================ */
    .work-nav {
      border-top: 1px solid var(--color-border);
      padding: 40px 0;
      display: grid; grid-template-columns: 1fr 1fr; gap: 16px;
    }
    .work-nav__item {
      display: flex; flex-direction: column; gap: 4px;
      padding: 20px 24px; border-radius: var(--radius-md);
      border: 1px solid var(--color-border); background: var(--color-surface);
      transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
    }
    .work-nav__item:hover { border-color: var(--color-coral); box-shadow: var(--shadow-md); transform: translateY(-2px); }
    .work-nav__item--next { text-align: right; }
    .work-nav__dir { font-size: .72rem; font-weight: 700; text-transform: uppercase; letter-spacing: .1em; color: var(--color-coral); font-family: var(--font-en); }
    .work-nav__name { font-size: .9rem; font-weight: 700; color: var(--color-text); }
    .work-nav__sub  { font-size: .78rem; color: var(--color-text-muted); }

    /* ============================================================
       フッター
    ============================================================ */
    .footer { background: var(--color-text); color: rgba(255,255,255,.7); padding: 40px 0; }
    .footer__inner { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 16px; }
    .footer__logo { font-family: var(--font-en); font-size: 1.2rem; font-weight: 800; color: #fff; }
    .footer__logo span { color: var(--color-coral); }
    .footer__copy { font-size: .78rem; color: rgba(255,255,255,.4); }
    .footer__social { display: flex; gap: 10px; }
    .social-link {
      width: 38px; height: 38px; border-radius: 50%;
      background: rgba(255,255,255,.08); display: flex; align-items: center; justify-content: center;
      font-size: .9rem; color: rgba(255,255,255,.7);
      transition: background var(--transition), color var(--transition), transform var(--transition);
    }
    .social-link:hover { background: var(--color-coral); color: #fff; transform: translateY(-2px); }


/* ============================================================
   制作プロセス（追加分）
============================================================ */
.process-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
  margin-top: 32px;
}

.process-card {
  display: flex;
  gap: 20px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px;
  transition: transform var(--transition), box-shadow var(--transition);
}

.process-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-coral);
}

.process-card__number {
  font-family: var(--font-en);
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--color-coral);
  line-height: 1;
  opacity: 0.8;
}

.process-card__title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 8px;
}

.process-card__text {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* モバイル対応の微調整 */
@media (max-width: 768px) {
  .process-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .process-card {
    padding: 20px;
  }
}


/* ============================================================
   制作実績一覧へ戻るボタン
============================================================ */
.back-to-list {
  display: flex;
  justify-content: center;
  margin-top: 56px;
  padding-bottom: 24px;
}

.btn--outline {
  background: #fff;
  color: var(--color-text);
  border: 1px solid var(--color-border);
  padding: 16px 40px;
  font-size: 0.95rem;
}

.btn--outline:hover {
  background: var(--color-surface-alt);
  border-color: var(--color-coral);
  color: var(--color-coral);
  box-shadow: var(--shadow-sm);
}

.btn--outline i {
  margin-right: 8px;
}

@media (max-width: 768px) {
  .back-to-list {
    margin-top: 40px;
  }
  .btn--outline {
    width: 100%; /* スマホでは押しやすいようフルサイズに */
    justify-content: center;
  }
}

    /* ============================================================
       フェードイン
    ============================================================ */
    .fade-in { opacity: 0; transform: translateY(24px); transition: opacity .6s ease, transform .6s ease; }
    .fade-in.visible { opacity: 1; transform: translateY(0); }

    /* ============================================================
       レスポンシブ
    ============================================================ */
    @media (max-width: 768px) {
      .project-hero__inner { grid-template-columns: 1fr; gap: 32px; padding: 40px 0; }
      .two-col { grid-template-columns: 1fr; gap: 32px; }
      .two-col--reverse { direction: ltr; }
      .challenge-grid { grid-template-columns: 1fr; }
      .result-grid { grid-template-columns: repeat(2, 1fr); }
      .screenshot-grid { grid-template-columns: 1fr; }
      .screenshot-grid--3 { grid-template-columns: repeat(2, 1fr); }
      .project-cta { flex-direction: column; align-items: flex-start; padding: 32px; }
      .work-nav { grid-template-columns: 1fr; }
      .footer__inner { flex-direction: column; align-items: flex-start; }
    }
    @media (max-width: 480px) {
      .result-grid { grid-template-columns: 1fr; }
      .screenshot-grid--3 { grid-template-columns: 1fr; }
    }