:root {
      --bg-0: #07110d;
      --bg-1: #0b1c15;
      --bg-2: #0f251c;
      --bg-3: #143126;
      --card: rgba(15, 37, 28, 0.92);
      --text: #e7f3ed;
      --muted: #b6c6be;
      --accent: #2b6a54;
      --accent-alt: #375e8f;
      --accent-hover: #6a4c93;
      --border: rgba(231, 243, 237, 0.12);
      --soft: rgba(7, 17, 13, 0.35);
      --shadow: 0 14px 28px rgba(0, 0, 0, 0.35);
      --radius: 18px;
      --focus: rgba(207, 227, 255, 0.55);
    }

    * { box-sizing: border-box; }

    html {
      scroll-behavior: smooth;
    }

    body {
      margin: 0;
      font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
      background:
        radial-gradient(900px 500px at 20% 0%, rgba(106, 76, 147, 0.18), transparent 60%),
        radial-gradient(900px 500px at 80% 10%, rgba(55, 94, 143, 0.18), transparent 60%),
        radial-gradient(1000px 700px at 50% 120%, rgba(43, 106, 84, 0.18), transparent 60%),
        linear-gradient(180deg, var(--bg-0), var(--bg-1) 35%, var(--bg-0));
      color: var(--text);
      line-height: 1.6;
    }

    a {
      color: #cfe3ff;
    }

    a:hover {
      text-decoration: underline;
    }

    :focus-visible {
      outline: 3px solid var(--focus);
      outline-offset: 3px;
      border-radius: 10px;
    }

    header {
      position: sticky;
      top: 0;
      z-index: 100;
      backdrop-filter: blur(10px);
      background: linear-gradient(135deg, rgba(11, 28, 21, 0.92), rgba(7, 17, 13, 0.92));
      border-bottom: 1px solid var(--border);
    }

    .header-inner {
      max-width: 1050px;
      margin: 0 auto;
      padding: 0.9rem 1.2rem 0.55rem;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 1rem;
    }

    .brand {
      display: flex;
      align-items: center;
      gap: 0.75rem;
      min-width: 0;
      color: inherit;
      text-decoration: none;
    }

    .brand:hover {
      text-decoration: none;
    }

    .brand-icon-link {
      display: flex;
      align-items: center;
      justify-content: center;
      text-decoration: none;
      flex: 0 0 auto;
    }

    .brand-icon {
      width: 104px;
      height: 104px;
      display: flex;
      align-items: center;
      justify-content: center;
      background: transparent;
      flex: 0 0 auto;
      overflow: visible;
      position: relative;
      z-index: 3;
    }

    .brand-icon img {
      width: 126px;
      height: 126px;
      display: block;
      object-fit: contain;
      position: relative;
      z-index: 3;
      filter: drop-shadow(0 10px 20px rgba(0, 0, 0, 0.35));
    }

    nav {
      margin-top: 0.1rem;
    }

    .nav-links {
      display: flex;
      flex-wrap: wrap;
      justify-content: flex-end;
      gap: 0.45rem;
    }

    .nav-links a {
      font-size: 0.9rem;
      padding: 0.35rem 0.7rem;
      border-radius: 999px;
      border: 1px solid rgba(231, 243, 237, 0.16);
      background: linear-gradient(135deg, rgba(106, 76, 147, 0.12), rgba(55, 94, 143, 0.10));
      transition: transform 0.15s ease, background 0.2s ease, border-color 0.2s ease;
      text-decoration: none;
    }

    .nav-links a:hover {
      transform: translateY(-1px);
      background: linear-gradient(135deg, rgba(106, 76, 147, 0.18), rgba(55, 94, 143, 0.16));
      border-color: rgba(231, 243, 237, 0.28);
      text-decoration: none;
    }

    .wrap {
      max-width: 1050px;
      margin: 0 auto;
      padding: 24px 20px 60px;
    }

    .hero {
      background:
        radial-gradient(900px 350px at 20% 0%, rgba(106, 76, 147, 0.22), transparent 60%),
        radial-gradient(900px 350px at 80% 10%, rgba(55, 94, 143, 0.22), transparent 60%),
        linear-gradient(135deg, rgba(15, 37, 28, 0.92), rgba(11, 28, 21, 0.92));
      color: var(--text);
      border: 1px solid var(--border);
      border-radius: 26px;
      padding: 28px;
      box-shadow: var(--shadow);
      margin-bottom: 24px;
      overflow: hidden;
      position: relative;
    }

    .hero::before {
      content: "";
      position: absolute;
      inset: 0;
      background:
        radial-gradient(circle at 30% 0%, rgba(43, 106, 84, 0.18), transparent 55%),
        radial-gradient(circle at 70% 20%, rgba(106, 76, 147, 0.14), transparent 55%);
      pointer-events: none;
    }

    .hero > * {
      position: relative;
      z-index: 1;
    }

    .hero h1 {
      margin: 0 0 10px;
      font-size: clamp(28px, 4vw, 42px);
      line-height: 1.1;
    }

    .hero p {
      margin: 0;
      font-size: 16px;
      max-width: 760px;
      color: var(--muted);
    }

    .grid {
      display: grid;
      grid-template-columns: 1.05fr 0.95fr;
      gap: 24px;
      align-items: start;
    }

    @media (max-width: 860px) {
      .grid {
        grid-template-columns: 1fr;
      }
    }

    .card {
      background: linear-gradient(180deg, rgba(15, 37, 28, 0.92), rgba(11, 28, 21, 0.92));
      border: 1px solid var(--border);
      border-radius: var(--radius);
      box-shadow: var(--shadow);
      padding: 24px;
      transition: transform 0.15s ease, background 0.2s ease, border-color 0.2s ease;
    }

    .card:hover {
      transform: translateY(-2px);
      background: linear-gradient(180deg, rgba(20, 49, 38, 0.92), rgba(11, 28, 21, 0.92));
      border-color: rgba(231, 243, 237, 0.18);
    }

    .card h2 {
      margin: 0 0 18px;
      font-size: 26px;
      line-height: 1.2;
      letter-spacing: 0.01em;
    }

    .meta {
      display: grid;
      gap: 10px;
      margin-bottom: 20px;
    }

    .meta-row {
      display: grid;
      grid-template-columns: 140px 1fr;
      gap: 12px;
      align-items: start;
      padding-bottom: 10px;
      border-bottom: 1px solid var(--border);
    }

    .meta-row:last-child {
      border-bottom: 0;
      padding-bottom: 0;
    }

    .label {
      font-weight: 700;
      color: #d8efe4;
    }

    .muted {
      color: var(--muted);
    }

    .zoom-box {
      background: rgba(7, 17, 13, 0.35);
      border: 1px solid var(--border);
      border-radius: 16px;
      padding: 18px;
      margin-top: 16px;
      box-shadow: 0 10px 22px rgba(0, 0, 0, 0.28);
    }

    .zoom-box h3,
    .agenda-box h3 {
      margin: 0 0 12px;
      font-size: 20px;
      color: #d8efe4;
    }

    .join-link {
      display: inline-block;
      margin-top: 6px;
      padding: 12px 16px;
      background: linear-gradient(135deg, rgba(43, 106, 84, 0.75), rgba(55, 94, 143, 0.55));
      color: var(--text);
      text-decoration: none;
      border: 1px solid var(--border);
      border-radius: 999px;
      font-weight: 700;
      box-shadow: 0 10px 22px rgba(0, 0, 0, 0.35);
      transition: transform 0.15s ease, background 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
    }

    .join-link:hover {
      background: linear-gradient(135deg, rgba(43, 106, 84, 0.9), rgba(106, 76, 147, 0.55));
      border-color: rgba(231, 243, 237, 0.26);
      text-decoration: none;
      transform: translateY(-1px);
      box-shadow: 0 14px 28px rgba(0, 0, 0, 0.4);
    }

    .agenda-box {
      background: rgba(7, 17, 13, 0.35);
      border: 1px solid var(--border);
      border-radius: 16px;
      padding: 18px;
      box-shadow: 0 10px 22px rgba(0, 0, 0, 0.28);
    }

    ol, ul {
      margin: 10px 0 0 20px;
      padding: 0;
    }

    li + li {
      margin-top: 8px;
    }

    .agenda-section {
      margin-top: 22px;
    }

    .agenda-section h4 {
      margin: 0 0 10px;
      font-size: 17px;
      color: #d8efe4;
      letter-spacing: 0.02em;
      text-transform: uppercase;
    }

    .time-block {
      margin-top: 12px;
      padding: 13px 15px;
      border-left: 4px solid var(--accent-alt);
      background: var(--soft);
      border-radius: 10px;
      box-shadow: inset 0 1px 0 rgba(231, 243, 237, 0.03);
    }

    .time-block strong {
      display: block;
      margin-bottom: 4px;
    }

    .actions {
      display: flex;
      flex-wrap: wrap;
      gap: 14px;
      margin-top: 22px;
    }

    .btn {
      display: inline-block;
      padding: 12px 16px;
      border-radius: 999px;
      text-decoration: none;
      font-weight: 700;
      border: 1px solid var(--border);
      box-shadow: 0 10px 22px rgba(0, 0, 0, 0.35);
      transition: transform 0.15s ease, background 0.2s ease, border-color 0.2s ease;
    }

    .btn-primary {
      background: linear-gradient(135deg, rgba(43, 106, 84, 0.75), rgba(55, 94, 143, 0.55));
      color: var(--text);
    }

    .btn-primary:hover {
      background: linear-gradient(135deg, rgba(43, 106, 84, 0.9), rgba(106, 76, 147, 0.55));
      border-color: rgba(231, 243, 237, 0.26);
      text-decoration: none;
      transform: translateY(-1px);
    }

    .btn-secondary {
      color: #cfe3ff;
      background: rgba(7, 17, 13, 0.35);
    }

    .btn-secondary:hover {
      background: rgba(7, 17, 13, 0.5);
      border-color: rgba(231, 243, 237, 0.26);
      text-decoration: none;
      transform: translateY(-1px);
    }

    .small {
      font-size: 14px;
      line-height: 1.6;
    }

    .note {
      margin-top: 18px;
      padding: 15px 18px;
      border-radius: 18px;
      background: linear-gradient(135deg, rgba(106, 76, 147, 0.16), rgba(55, 94, 143, 0.1));
      border: 1px solid var(--border);
      color: var(--muted);
    }

    footer {
      margin-top: 28px;
      text-align: center;
      color: var(--muted);
      font-size: 13px;
    }

    .back-to-top {
      position: fixed;
      right: 1.15rem;
      bottom: 1.15rem;
      width: 46px;
      height: 46px;
      border-radius: 999px;
      border: 1px solid rgba(231, 243, 237, 0.16);
      background: linear-gradient(135deg, rgba(43, 106, 84, 0.9), rgba(55, 94, 143, 0.78));
      color: var(--text);
      box-shadow: 0 14px 28px rgba(0, 0, 0, 0.35);
      display: inline-flex;
      align-items: center;
      justify-content: center;
      text-decoration: none;
      z-index: 110;
      opacity: 0;
      transform: translateY(12px);
      pointer-events: none;
      transition: opacity 0.2s ease, transform 0.2s ease, background 0.2s ease, border-color 0.2s ease;
      backdrop-filter: blur(10px);
    }

    .back-to-top.visible {
      opacity: 0.92;
      transform: translateY(0);
      pointer-events: auto;
    }

    .back-to-top:hover {
      text-decoration: none;
      background: linear-gradient(135deg, rgba(43, 106, 84, 1), rgba(106, 76, 147, 0.72));
      border-color: rgba(231, 243, 237, 0.28);
    }

    .back-to-top span {
      font-size: 1.2rem;
      line-height: 1;
      transform: translateY(-1px);
    }

    @media (max-width: 640px) {
      .header-inner {
        flex-direction: row;
        align-items: center;
        gap: 0.7rem;
        padding: 0.45rem 0.8rem 0.35rem;
        flex-wrap: wrap;
      }

      .brand-icon {
        width: 50px;
        height: 50px;
      }

      .brand-icon img {
        width: 60px;
        height: 60px;
      }

      nav {
        width: 100%;
        margin-top: 0;
      }

      .nav-links {
        justify-content: flex-start;
        gap: 0.32rem;
        flex-wrap: nowrap;
        overflow-x: auto;
        width: 100%;
        padding-bottom: 0.15rem;
        scrollbar-width: thin;
      }

      .nav-links a {
        font-size: 0.82rem;
        padding: 0.25rem 0.6rem;
        white-space: nowrap;
        flex: 0 0 auto;
      }

      .wrap {
        padding: 18px 16px 48px;
      }

      .hero,
      .card {
        padding: 20px;
      }

      .meta-row {
        grid-template-columns: 1fr;
        gap: 6px;
      }

      .actions {
        gap: 10px;
      }

      .back-to-top {
        right: 0.9rem;
        bottom: 0.9rem;
        width: 42px;
        height: 42px;
      }
    }

    code {
      background: rgba(7, 17, 13, 0.45);
      padding: 2px 6px;
      border-radius: 6px;
    }