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

    body {
      font-family: 'Arial', sans-serif;
      background: #ffffff;
      display: flex;
      justify-content: center;
      align-items: center;
      min-height: 100vh;
      padding: 20px;
    }

    #outer {
      width: 100%;
      max-width: 1000px;
      height: 600px;
      background: #ffffff;
      position: relative;
      display: flex;
      justify-content: center;
      align-items: center;
    }

    .center-number {
      font-size: 140px;
      font-weight: 900;
      color: #f0f0f0;
      text-shadow: -2px -2px 0 #000, 2px -2px 0 #000, -2px 2px 0 #000, 2px 2px 0 #000;
      z-index: 1;
      letter-spacing: -5px;
    }

    #inner {
      position: absolute;
      width: 100%;
      height: 100%;
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      grid-template-rows: repeat(2, 1fr);
      gap: 30px;
      padding: 60px;
      pointer-events: none;
    }

    .nav-button {
      position: relative;
      cursor: pointer;
      pointer-events: all;
      transition: transform 0.2s ease;
    }

    .nav-button:hover {
      transform: scale(1.05);
    }

    .nav-image {
      width: 100%;
      height: 100%;
      object-fit: cover;
      border: 5px solid #000;
      border-radius: 5px;
      box-shadow:
        8px 8px 0 rgba(0, 0, 0, 0.3),
        0 4px 12px rgba(0, 0, 0, 0.2);
      transition: transform 0.2s ease, box-shadow 0.2s ease;
    }

    .nav-button:hover .nav-image {
      box-shadow:
        12px 12px 0 rgba(0, 0, 0, 0.4),
        0 8px 20px rgba(0, 0, 0, 0.3);
    }

    .image-label {
      position: absolute;
      bottom: 10px;
      left: 50%;
      transform: translateX(-50%);
      background: rgba(0, 0, 0, 0.85);
      color: #ffffff;
      padding: 8px 20px;
      font-size: 18px;
      font-weight: bold;
      text-transform: uppercase;
      letter-spacing: 2px;
      border-radius: 3px;
      white-space: nowrap;
    }

    .nav-button-1 {
      grid-column: 1;
      grid-row: 1;
      justify-self: end;
      align-self: end;
      width: 180px;
      height: 180px;
    }

    .nav-button-2 {
      grid-column: 2;
      grid-row: 1;
      justify-self: start;
      align-self: end;
      width: 180px;
      height: 180px;
    }

    .nav-button-3 {
      grid-column: 1;
      grid-row: 2;
      justify-self: end;
      align-self: start;
      width: 180px;
      height: 180px;
    }

    .nav-button-4 {
      grid-column: 2;
      grid-row: 2;
      justify-self: start;
      align-self: start;
      width: 180px;
      height: 180px;
    }


    .dialog-overlay {
      display: none;
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background: rgba(0, 0, 0, 0.7);
      justify-content: center;
      align-items: center;
      z-index: 1000;
    }

    .dialog-overlay.active {
      display: flex;
      animation: fadeIn 0.3s ease;
    }

    @keyframes fadeIn {
      from {
        opacity: 0;
      }
      to {
        opacity: 1;
      }
    }

    .dialog-box {
      background: #ffffff;
      border: 8px solid #000;
      padding: 40px;
      border-radius: 10px;
      text-align: center;
      max-width: 500px;
      width: 90%;
      box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
      animation: popUp 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
    }

    @keyframes popUp {
      0% {
        transform: scale(0) translate(-50%, -50%);
        opacity: 0;
      }
      100% {
        transform: scale(1) translate(0, 0);
        opacity: 1;
      }
    }

    .dialog-title {
      font-size: 32px;
      font-weight: bold;
      color: #000;
      margin-bottom: 20px;
      text-transform: uppercase;
      letter-spacing: 2px;
    }

    .dialog-message {
      font-size: 16px;
      color: #333;
      margin-bottom: 30px;
      line-height: 1.6;
    }

    .dialog-buttons {
      display: flex;
      gap: 15px;
      justify-content: center;
      flex-wrap: wrap;
    }

    .dialog-btn {
      padding: 12px 30px;
      font-size: 14px;
      font-weight: bold;
      border: 2px solid #000;
      background: #ffffff;
      cursor: pointer;
      transition: all 0.2s ease;
      text-transform: uppercase;
      letter-spacing: 1px;
    }

    .dialog-btn:hover {
      background: #000;
      color: #ffffff;
      transform: scale(1.05);
    }

    .dialog-btn.primary {
      background: #000;
      color: #ffffff;
    }

    .dialog-btn.primary:hover {
      background: #ffffff;
      color: #000;
    }

    @media (max-width: 768px) {
      #outer {
        height: 500px;
      }

      #inner {
        gap: 20px;
        padding: 40px;
      }

      .nav-button-1,
      .nav-button-2,
      .nav-button-3,
      .nav-button-4 {
        width: 120px;
        height: 120px;
      }

      .image-label {
        font-size: 14px;
        padding: 6px 14px;
      }

      .center-number {
        font-size: 120px;
      }

      .dialog-box {
        padding: 30px;
      }

      .dialog-title {
        font-size: 24px;
      }

      .dialog-message {
        font-size: 14px;
      }
    }