:root {
      --page-bg: #f0f2f5;
      --text: #333;
      --heading: #1c1e21;
      --muted: #888;
      --danger: #d32f2f;
      --blue-a: #5d9cec;
      --blue-b: #4a89dc;
      --red: #e74c3c;
      --radius: 12px;
      --shadow-soft: 0 4px 8px rgba(0, 0, 0, 0.05);
      --shadow-hover: 0 6px 15px rgba(0, 0, 0, 0.1);
    }

    * {
      box-sizing: border-box;
    }

    html {
      background: var(--page-bg);
    }

    body {
      min-height: 100vh;
      margin: 0;
      padding: 20px 0;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: flex-start;
      font-family: Arial, sans-serif;
      background-color: var(--page-bg);
      color: var(--text);
    }

    .main-container {
      width: 100%;
      max-width: 680px;
      padding: 0 15px;
    }

    .profile-image-container {
      width: 96px;
      height: 96px;
      margin: 0 auto 20px;
      overflow: hidden;
      border-radius: 50%;
      box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
      background: #fff;
    }

    .profile-image-container img {
      width: 100%;
      height: 100%;
      display: block;
      object-fit: cover;
    }

    .text-container {
      width: 100%;
      margin-bottom: 25px;
      text-align: center;
    }

    .text-container h1 {
      margin: 0 0 15px;
      color: var(--heading);
      font-size: 24px;
      font-weight: 700;
      line-height: 1.2;
    }

    .text-container p {
      margin: 0 0 1.5em;
      color: var(--text);
      font-size: 16px;
      font-weight: 500;
      line-height: 1.7;
      text-align: left;
      white-space: pre-line;
    }

    .content-image {
      width: 100%;
      height: auto;
      margin-top: 20px;
      display: block;
      border-radius: var(--radius);
    }

    .highlight-copy {
      color: var(--danger) !important;
      font-weight: 700 !important;
      text-align: center !important;
      white-space: normal !important;
    }

    .second-button {
      width: 100%;
      min-height: 62px;
      margin-top: 20px;
      padding: 16px;
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 12px;
      border: 0;
      border-radius: var(--radius);
      background: linear-gradient(90deg, var(--blue-a) 0%, var(--blue-b) 100%);
      color: #fff;
      box-shadow: var(--shadow-soft);
      cursor: pointer;
      text-align: center;
      text-decoration: none;
      font-size: 18px;
      font-weight: 700;
      line-height: 1.25;
      transition: transform 0.3s ease, box-shadow 0.3s ease;
      animation: pulse 2s infinite;
    }

    .second-button:hover,
    .second-button:focus-visible {
      transform: translateY(-3px);
      box-shadow: var(--shadow-hover);
      outline: none;
    }

    .second-button img {
      width: 30px;
      height: 30px;
      flex: 0 0 30px;
      display: block;
    }

    .footer-disclaimer {
      max-width: 680px;
      margin-top: 30px;
      padding: 20px;
      color: var(--muted);
      font-size: 12px;
      line-height: 1.5;
      text-align: center;
    }

    .popup {
      width: 100%;
      height: 100%;
      position: fixed;
      inset: 0;
      z-index: 1000;
      display: none;
      align-items: center;
      justify-content: center;
      overflow: auto;
      padding: 18px;
      background-color: rgba(0, 0, 0, 0.6);
      backdrop-filter: blur(5px);
      -webkit-backdrop-filter: blur(5px);
    }

    .popup.is-open {
      display: flex;
    }

    .popup-content {
      width: 90%;
      max-width: 500px;
      margin: auto;
      padding: 25px;
      position: relative;
      border: 1px solid #888;
      border-radius: var(--radius);
      background: #fefefe;
      color: var(--text);
      box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
      font-size: 16px;
      line-height: 1.7;
      text-align: left;
    }

    .popup-content p {
      margin: 10px 0;
    }

    .popup-title {
      margin-bottom: 20px !important;
      font-size: 1.2em;
      font-weight: 700;
      text-align: center;
    }

    .close-popup {
      position: absolute;
      top: 10px;
      right: 20px;
      border: 0;
      background: transparent;
      color: #aaa;
      cursor: pointer;
      font-size: 32px;
      font-weight: 700;
      line-height: 1;
    }

    .close-popup:hover,
    .close-popup:focus-visible {
      color: #000;
      outline: none;
    }

    .popup-buttons {
      margin-top: 25px;
      display: flex;
      justify-content: space-between;
      gap: 15px;
    }

    .popup-buttons button {
      flex: 1 1 0;
      min-height: 52px;
      padding: 14px 20px;
      border: 0;
      border-radius: 30px;
      color: #fff;
      cursor: pointer;
      font-size: 16px;
      font-weight: 700;
      line-height: 1.25;
      transition: transform 0.3s ease, box-shadow 0.3s ease;
    }

    .popup-buttons button:hover,
    .popup-buttons button:focus-visible {
      transform: translateY(-2px);
      box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
      outline: none;
    }

    .popup-confirm-btn {
      background: linear-gradient(90deg, var(--blue-a) 0%, var(--blue-b) 100%);
    }

    .popup-cancel-btn {
      background-color: var(--red);
    }

    .demo-notice {
      display: none;
      margin-top: 16px !important;
      padding: 10px 12px;
      border-radius: 10px;
      background: #eef5ff;
      color: #28558b;
      font-size: 14px;
      font-weight: 700;
      text-align: center;
    }

    .demo-notice.is-visible {
      display: block;
    }

    @keyframes pulse {
      0% { transform: scale(1); }
      50% { transform: scale(1.03); }
      100% { transform: scale(1); }
    }

    @media (max-width: 768px) {
      .text-container h1 {
        font-size: 22px;
      }

      .text-container p {
        font-size: 15px;
      }

      .second-button {
        padding: 15px;
        font-size: 16px;
      }
    }

    @media (max-width: 480px) {
      body {
        padding-top: 20px;
      }

      .main-container {
        padding: 0 15px;
      }

      .second-button {
        align-items: center;
      }

      .popup-content {
        width: 100%;
        padding: 25px;
      }

      .popup-buttons {
        flex-direction: column;
      }
    }

    @media (prefers-reduced-motion: reduce) {
      *, *::before, *::after {
        scroll-behavior: auto !important;
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
      }
    }
    .footer-links {
      margin-top: 14px;
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 14px;
    }

    .footer-links a {
      color: var(--muted);
      text-decoration: underline;
      text-underline-offset: 3px;
    }