:root {
      --blue: #1e88ff;
      --green: #16a34a;
      --dark: #0f172a;
      --light: #f8fafc;
      --accent: #ffb703;
      --muted: #64748b;
      --card: #ffffff;
      --radius: 14px;
      --shadow: 0 8px 24px rgba(2, 6, 23, 0.12);
    }
    /* Reset & base */
    *, *::before, *::after { box-sizing: border-box; }
    html, body { margin: 0; padding: 0; }
    body {
      font-family: system-ui, -apple-system, "Segoe UI", "Hiragino Kaku Gothic ProN", "Noto Sans JP", sans-serif;
      color: var(--dark);
      background: linear-gradient(180deg, var(--light) 0%, #eef5ff 100%);
      line-height: 1.6;
    }
    a { color: var(--blue); text-decoration: none; }
    a:focus-visible, button:focus-visible { outline: 3px solid #7cc4ff; outline-offset: 2px; border-radius: 8px; }

    /* Container */
    .container { width: min(1080px, 92vw); margin: 0 auto; }

    /* Header / hero */
    header {
      background: linear-gradient(135deg, var(--blue), #5aa7ff);
      color: #fff;
      padding: 24px 0 32px;
      position: relative;
    }
    .brand {
      display: flex; align-items: center; gap: 16px; padding: 6px 0;
    }
    .brand img {
      width: 160px; height: 100px; object-fit: cover; border-radius: 12px; box-shadow: var(--shadow);
      background: #fff;
    }
    .brand h1 { font-size: clamp(20px, 3.5vw, 28px); margin: 0; letter-spacing: 0.5px; }
    .brand p { margin: 2px 0 0; color: #e7f3ff; font-size: 14px; }

    /* Nav */
    nav {
      margin-top: 16px; display: flex; gap: 10px; flex-wrap: wrap;
    }
    .tab {
      background: rgba(255,255,255,0.18); color: #fff; border: 0; padding: 10px 14px;
      border-radius: 999px; cursor: pointer; transition: background 0.18s;
    }
    .tab:hover { background: rgba(255,255,255,0.28); }
    .tab.active { background: #fff; color: var(--blue); }

    /* Hero card */
    .hero {
      margin-top: 18px; background: rgba(255,255,255,0.18); border: 1px solid rgba(255,255,255,0.35);
      backdrop-filter: blur(6px); border-radius: var(--radius); padding: 20px;
    }
    .hero h2 { margin: 0 0 8px; font-size: clamp(18px, 3vw, 22px); }
    .hero p { margin: 0; color: #eaf5ff; }

    /* Controls */
    .controls {
      display: grid; grid-template-columns: 1fr; gap: 10px; margin: 18px 0;
    }
    @media (min-width: 640px) {
      .controls { grid-template-columns: 1.4fr 1fr 1fr; }
    }
    .control {
      background: #fff; border: 1px solid #e2e8f0; border-radius: 12px; padding: 10px;
      display: flex; align-items: center; gap: 10px; box-shadow: var(--shadow);
    }
    .control label { font-weight: 600; color: var(--muted); font-size: 13px; }
    .control input, .control select {
      border: 0; flex: 1; font-size: 15px; background: transparent; color: var(--dark);
    }

    /* Cards */
    .grid {
      display: grid; grid-template-columns: 1fr; gap: 16px;
    }
    @media (min-width: 720px) {
      .grid { grid-template-columns: 1fr 1fr; }
    }
    @media (min-width: 1024px) {
      .grid { grid-template-columns: 1fr 1fr 1fr; }
    }
    .card {
      background: var(--card); border: 1px solid #e5eaf1; border-radius: var(--radius);
      box-shadow: var(--shadow); overflow: hidden; display: flex; flex-direction: column;
    }
    .card-header {
      background: linear-gradient(90deg, #f6ffed, #ebfff5);
      padding: 12px 14px; border-bottom: 1px solid #e5eaf1;
    }
    .card-header h3 { margin: 0; font-size: 18px; }
    .badge {
      display: inline-block; margin-top: 6px; font-size: 12px; color: #155e22; background: #c9f1d7;
      padding: 4px 8px; border-radius: 999px; font-weight: 700;
    }
    .card-body { padding: 14px; display: grid; gap: 8px; }
    .meta { display: grid; gap: 6px; color: var(--muted); font-size: 14px; }
    .actions { display: flex; gap: 8px; margin-top: 8px; }
    .btn {
      border: 1px solid #dbe7ff; background: #f7fbff; color: var(--blue);
      padding: 10px 12px; border-radius: 10px; font-weight: 700; cursor: pointer; flex: 1;
    }
    .btn.primary { background: var(--blue); color: #fff; border-color: var(--blue); }
    .btn.secondary { background: #eef6ff; }

    /* Section titles */
    section { padding: 22px 0; }
    .section-title {
      display: flex; align-items: baseline; justify-content: space-between; gap: 12px; margin-bottom: 10px;
    }
    .section-title h2 { margin: 0; font-size: clamp(18px, 3vw, 22px); }
    .section-title small { color: var(--muted); }

    /* Accordion (FAQ) */
    details {
      background: #fff; border: 1px solid #e2e8f0; border-radius: 12px; padding: 12px 14px;
      box-shadow: var(--shadow);
    }
    details + details { margin-top: 10px; }
    summary { cursor: pointer; font-weight: 700; color: var(--dark); }
    details p { margin: 8px 0 0; color: var(--muted); }

    /* Footer */
    footer {
      background: #062a52; color: #cfe8ff; margin-top: 24px; padding: 22px 0;
    }
    .footer-grid { display: grid; grid-template-columns: 1fr; gap: 14px; }
    @media (min-width: 720px) {
      .footer-grid { grid-template-columns: 1.5fr 1fr 1fr; }
    }
    .footer-grid a { color: #eaf5ff; }
    .copyright { margin-top: 10px; font-size: 13px; color: #a8d3ff; }

    /* Utility badges */
    .pill {
      display: inline-flex; align-items: center; gap: 8px;
      background: #fff; border: 1px dashed #cfe2ff; color: var(--blue);
      padding: 8px 12px; border-radius: 999px; font-weight: 700;
    }

    /* Print */
    @media print {
      nav, .controls, .actions, footer { display: none !important; }
      body { background: #fff; }
      .card, details { box-shadow: none; border-color: #ccc; }
    }