@charset "UTF-8";
/* CSS Document */
    /* ===== Color Scheme (BCARA-like) ===== */
    :root {
      --bg-white: #fff;
      --text-main: #222;
      --text-muted: #666;
      --accent: #3d4796; /* アクセント */
      --accent-light: #a1a6ca; /* 背景系 */
      --border-light: #eaeaea;
      --btn-text: #fff;
    }

    * { box-sizing: border-box; margin: 0; padding: 0; }
    body {
      font-family: "Yu Gothic","Hiragino Kaku Gothic ProN","Noto Sans JP",sans-serif;
      background: var(--bg-white);
      color: var(--text-main);
      line-height: 1.65;
    }
    .container {
      max-width: 780px;
      margin: 0 auto;
      padding: 20px 18px 60px;
    }
    h1 {
      font-size: 24px;
      margin-bottom: 8px;
      font-weight: 700;
      color: var(--accent);
    }
    .subtitle {
      font-size: 14px;
      color: var(--text-muted);
      margin-bottom: 20px;
    }
    .section {
      margin-bottom: 28px;
      padding: 16px;
      border: 1px solid var(--border-light);
      border-radius: 10px;
      background: var(--bg-white);
    }
    .section h2 {
      font-size: 18px;
      font-weight: 600;
      margin-bottom: 10px;
      color: var(--text-main);
    }
    .step-list {
      list-style: none;
      margin-top: 12px;
    }
    .step-list li {
      margin-bottom: 12px;
      padding-left: 8px;
      border-left: 3px solid var(--accent);
    }
    .step-list b {
      display: block;
      margin-bottom: 4px;
    }
    .note {
      margin-top: 10px;
      font-size: 14px;
      color: var(--text-muted);
      background: var(--accent-light);
      padding: 10px;
      border-radius: 8px;
    }
    details {
      margin-top: 12px;
      border-top: 1px solid var(--border-light);
      padding-top: 10px;
    }
    summary {
      cursor: pointer;
      font-weight: 600;
      font-size: 15px;
      color: var(--text-main);
    }
    .btn {
      display: inline-block;
      text-decoration: none;
      background: var(--accent);
      color: var(--btn-text);
      padding: 12px 18px;
      border-radius: 6px;
      font-weight: 600;
      margin-top: 12px;
      font-size: 15px;
      text-align: center;
    }
    .btn.secondary {
      background: #777;
      margin-left: 8px;
    }
    footer {
      text-align: center;
      font-size: 12px;
      color: var(--text-muted);
      margin-top: 30px;
    }