:root {
      --primary: #2563eb;
      --accent: #f59e0b;
      --bg: #f8fafc;
      --card: #ffffff;
      --text: #1e293b;
      --muted: #64748b;
      --border: #e2e8f0;
    }
    * { box-sizing: border-box; margin: 0; padding: 0; }
    body {
      font-family: 'Hiragino Kaku Gothic ProN', 'Noto Sans JP', sans-serif;
      background: var(--bg);
      color: var(--text);
      line-height: 1.8;
    }
    header {
      background: var(--primary);
      color: white;
      padding: 1rem 2rem;
      font-size: 0.9rem;
    }
    header a { color: white; text-decoration: none; }
    .hero {
      background: linear-gradient(135deg, #1e3a8a 0%, #2563eb 60%, #3b82f6 100%);
      color: white;
      padding: 3rem 2rem 4rem;
      text-align: center;
    }
    .hero .kamo { font-size: 3rem; margin-bottom: 1rem; }
    .hero h1 {
      font-size: clamp(1.3rem, 4vw, 2rem);
      font-weight: 900;
      line-height: 1.4;
      margin-bottom: 1rem;
    }
    .hero .meta {
      font-size: 0.85rem;
      opacity: 0.8;
      margin-top: 1rem;
    }
    .container {
      max-width: 740px;
      margin: 0 auto;
      padding: 0 1.5rem;
    }
    .article {
      background: var(--card);
      border-radius: 1rem;
      padding: 2.5rem 2rem;
      margin: -2rem auto 2rem;
      box-shadow: 0 4px 24px rgba(0,0,0,0.08);
      position: relative;
    }
    h2 {
      font-size: 1.3rem;
      font-weight: 800;
      color: var(--primary);
      margin: 2.5rem 0 1rem;
      padding-bottom: 0.4rem;
      border-bottom: 3px solid var(--accent);
    }
    h3 {
      font-size: 1.05rem;
      font-weight: 700;
      margin: 1.8rem 0 0.6rem;
      color: var(--text);
    }
    p { margin-bottom: 1.2rem; }
    .card {
      background: #eff6ff;
      border-left: 4px solid var(--primary);
      border-radius: 0 0.5rem 0.5rem 0;
      padding: 1rem 1.2rem;
      margin: 1.5rem 0;
    }
    .card.amber {
      background: #fffbeb;
      border-left-color: var(--accent);
    }
    .card.green {
      background: #f0fdf4;
      border-left-color: #22c55e;
    }
    .phase-block {
      border: 2px solid var(--border);
      border-radius: 0.75rem;
      overflow: hidden;
      margin: 1.5rem 0;
    }
    .phase-header {
      background: var(--primary);
      color: white;
      padding: 0.6rem 1.2rem;
      font-weight: 700;
      font-size: 0.95rem;
    }
    .phase-header.p2 { background: #7c3aed; }
    .phase-header.p3 { background: #059669; }
    .phase-header.p4 { background: #dc2626; }
    .phase-body {
      padding: 1rem 1.2rem;
    }
    .phase-body ul {
      list-style: none;
      padding: 0;
    }
    .phase-body ul li {
      padding: 0.3rem 0;
      padding-left: 1.4rem;
      position: relative;
    }
    .phase-body ul li::before {
      content: '→';
      position: absolute;
      left: 0;
      color: var(--primary);
    }
    .flow {
      display: flex;
      flex-direction: column;
      gap: 0.5rem;
      margin: 1.2rem 0;
    }
    .flow-item {
      background: #f1f5f9;
      border-radius: 0.5rem;
      padding: 0.7rem 1rem;
      font-size: 0.95rem;
      display: flex;
      align-items: center;
      gap: 0.6rem;
    }
    .flow-item .icon { font-size: 1.2rem; }
    .arrow { text-align: center; color: var(--muted); font-size: 1.2rem; }
    .kamo-comment {
      background: linear-gradient(135deg, #dbeafe, #eff6ff);
      border: 2px solid #93c5fd;
      border-radius: 1rem;
      padding: 1.5rem;
      margin: 2rem 0;
      position: relative;
    }
    .kamo-comment::before {
      content: '🦆 かもちゃんより';
      display: block;
      font-weight: 700;
      color: var(--primary);
      margin-bottom: 0.7rem;
      font-size: 0.9rem;
    }
    .tag-list {
      display: flex;
      flex-wrap: wrap;
      gap: 0.5rem;
      margin-top: 2rem;
      padding-top: 1.5rem;
      border-top: 1px solid var(--border);
    }
    .tag {
      background: #eff6ff;
      color: var(--primary);
      padding: 0.25rem 0.75rem;
      border-radius: 99px;
      font-size: 0.8rem;
    }
    footer {
      text-align: center;
      padding: 2rem;
      color: var(--muted);
      font-size: 0.85rem;
    }
    footer a { color: var(--primary); }
    @media (max-width: 600px) {
      .article { padding: 1.8rem 1.2rem; }
    }