:root {
      --c-bg: #ffffff;
      --c-text: #0f172a;
      --c-text-muted: #64748b;
      --c-primary: #0ea5e9;
      --c-primary-dark: #0284c7;
      --c-surface: #f8fafc;
      --c-border: #e2e8f0;
      --font-en: 'Inter', sans-serif;
      --font-ja: 'Noto Sans JP', sans-serif;
    }

    * { margin: 0; padding: 0; box-sizing: border-box; }

    body {
      font-family: var(--font-en);
      color: var(--c-text);
      background-color: var(--c-bg);
      line-height: 1.7;
      -webkit-font-smoothing: antialiased;
      min-height: 100vh;
      display: flex;
      flex-direction: column;
    }

    h1, h2, h3 { font-family: var(--font-ja); line-height: 1.3; font-weight: 700; }
    p { font-family: var(--font-ja); }

    .nav {
      position: sticky;
      top: 0;
      height: 80px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 0 5%;
      background: rgba(255, 255, 255, 0.85);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid rgba(0,0,0,0.05);
      z-index: 1000;
    }
    .nav-brand {
      display: flex;
      align-items: center;
      gap: 12px;
      text-decoration: none;
      color: var(--c-text);
    }
    .nav-logo { height: 40px; width: auto; }
    .nav-title { font-weight: 800; font-size: 1.25rem; letter-spacing: 0.05em; }
    .nav-links { display: flex; align-items: center; gap: 1.25rem; }
    .nav-link {
      font-family: var(--font-ja);
      font-size: 0.9rem;
      font-weight: 600;
      color: var(--c-text);
      text-decoration: none;
      transition: color 0.2s;
    }
    .nav-link:hover,
    .nav-link.is-current { color: var(--c-primary); }
    .nav-contact {
      font-family: var(--font-ja);
      font-size: 0.9rem;
      font-weight: 600;
      color: #fff;
      background: var(--c-text);
      padding: 0.6rem 1.25rem;
      border-radius: 999px;
      text-decoration: none;
      transition: background 0.3s;
    }
    .nav-contact:hover { background: var(--c-primary); }

    main {
      flex: 1;
      padding: 6rem 5% 4rem;
      position: relative;
      overflow: hidden;
    }
    .bg {
      position: absolute;
      inset: 0;
      background:
        radial-gradient(circle at 80% 20%, rgba(14, 165, 233, 0.06) 0%, transparent 40%),
        radial-gradient(circle at 20% 80%, rgba(2, 132, 199, 0.04) 0%, transparent 40%);
      z-index: -1;
    }
    .page { max-width: 800px; margin: 0 auto; width: 100%; }
    .page-label {
      font-family: var(--font-en);
      font-weight: 800;
      color: var(--c-primary);
      letter-spacing: 0.15em;
      text-transform: uppercase;
      font-size: 0.85rem;
      margin-bottom: 1rem;
      display: block;
    }
    .page-title {
      font-size: clamp(1.5rem, 3.5vw, 2rem);
      font-weight: 700;
      margin-bottom: 2.5rem;
    }

    .event-card {
      display: block;
      background: var(--c-surface);
      border: 1px solid var(--c-border);
      border-radius: 24px;
      padding: 2rem 2rem 1.75rem;
      text-decoration: none;
      color: inherit;
      transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    }
    .event-card:hover {
      transform: translateY(-4px);
      box-shadow: 0 16px 32px rgba(0,0,0,0.05);
      border-color: transparent;
      background: #fff;
    }
    .event-meta {
      font-family: var(--font-ja);
      font-size: 0.85rem;
      font-weight: 600;
      color: var(--c-primary-dark);
      margin-bottom: 0.75rem;
    }
    .event-card h2 {
      font-size: 1.25rem;
      margin-bottom: 0.75rem;
    }
    .event-card p {
      color: var(--c-text-muted);
      font-size: 0.95rem;
      margin-bottom: 1rem;
    }
    .event-more {
      font-family: var(--font-ja);
      font-size: 0.9rem;
      font-weight: 600;
      color: var(--c-primary);
    }

    .footer {
      background: #0f172a;
      color: #94a3b8;
      padding: 3rem 5%;
      text-align: center;
      font-size: 0.9rem;
    }
    .footer-logo {
      height: 36px;
      margin-bottom: 1.25rem;
      opacity: 0.5;
      filter: grayscale(100%) brightness(200%);
    }
    .footer-links { margin-bottom: 1rem; }
    .footer-links a {
      color: #64748b;
      text-decoration: none;
      font-size: 0.85rem;
      font-family: var(--font-ja);
    }
    .footer-links a:hover { color: #cbd5e1; text-decoration: underline; }

    @media (max-width: 640px) {
      .nav { padding: 0 4%; }
      .nav-logo { height: 32px; }
      .nav-title { display: none; }
      .nav-links { gap: 0.65rem; }
      .nav-link { font-size: 0.8rem; }
      .nav-contact {
        padding: 0;
        background: transparent;
        color: var(--c-text);
        border-radius: 0;
        font-size: 0.8rem;
      }
      .nav-contact:hover { background: transparent; color: var(--c-primary); }
    }

    .breadcrumbs { margin-bottom: 2rem; font-size: .85rem; color: #64748b; }
    a { color: #0369a1; text-underline-offset: .2em; }
    a:focus-visible { outline: 3px solid #0284c7; outline-offset: 4px; }
    .intro { font-family: var(--font-ja); font-size: 1.05rem; }
    .page-title { margin-bottom: 1rem; }
    .section { margin-top: 3rem; padding-top: 2rem; border-top: 1px solid var(--c-border); }
    .section h2 { font-size: 1.3rem; margin-bottom: 1rem; }
    .section h3 { font-size: 1rem; margin: 1.5rem 0 .5rem; }
    .section p + p { margin-top: .8rem; }
    .section ul { padding-left: 1.3rem; font-family: var(--font-ja); }
    .section li + li { margin-top: .4rem; }
    .section-nav { display: flex; flex-wrap: wrap; gap: .7rem 1.4rem; margin-top: 2rem; font-size: .9rem; }
    section { scroll-margin-top: 100px; }
    .event-card { margin-top: 1.5rem; }
    .status { color: #64748b; }
    @media(max-width:640px) { main { padding-top: 2.5rem; } .event-card { padding: 1.4rem; } }