body {
      margin: 0;
      background: linear-gradient(120deg, #1e3c72, #2a5298, #f7971e, #ffd200, #21d4fd, #b721ff);
      background-size: 200% 200%;
      animation: gradientBG 10s ease infinite;
      font-family: 'Roboto', Arial, sans-serif;
      color: #fff;
    }
    @keyframes gradientBG {
      0% {background-position: 0% 50%;}
      50% {background-position: 100% 50%;}
      100% {background-position: 0% 50%;}
    }
    header {
      background: rgba(30,60,114,0.95);
      padding: 18px 0 10px 0;
      text-align: center;
      box-shadow: 0 2px 10px rgba(30,60,114,0.2);
    }
    .logo {
      font-family: 'Montserrat', cursive;
      font-size: 2.5rem;
      letter-spacing: 3px;
      color: #ffd200;
      text-shadow: 2px 2px 8px #21d4fd, 0 0 12px #b721ff;
      display: inline-block;
      margin-bottom: 8px;
    }
    nav {
      margin: 16px 0 0 0;
      display: flex;
      justify-content: center;
      flex-wrap: wrap;
      gap: 18px;
    }
    nav a {
      font-family: 'Montserrat', sans-serif;
      font-size: 1.05rem;
      font-weight: bold;
      color: #21d4fd;
      background: #ffd200;
      border-radius: 30px;
      padding: 8px 22px;
      margin: 0 4px;
      text-decoration: none;
      transition: all 0.22s;
      border: 2px solid #21d4fd;
      box-shadow: 0 2px 8px #b721ff33;
    }
    nav a:hover {
      color: #ffd200;
      background: #21d4fd;
      border-color: #ffd200;
      box-shadow: 0 4px 16px #b721ff55;
      text-shadow: 1px 1px 4px #fff;
    }
    main {
      max-width: 900px;
      margin: 32px auto 0 auto;
      background: rgba(0,0,0,0.72);
      border-radius: 14px;
      box-shadow: 0 4px 32px #1e3c7266;
      padding: 36px 28px 28px 28px;
      font-size: 1.13rem;
      line-height: 1.7;
      color: #f7f7f7;
    }
    h1, h2, h3, h4 {
      font-family: 'Montserrat', sans-serif;
      font-weight: 700;
      margin-top: 2.2em;
      margin-bottom: 0.6em;
      letter-spacing: 1px;
      color: #ffd200;
      text-shadow: 0 2px 8px #21d4fd, 0 0 10px #b721ff;
    }
    h1 { font-size: 2.2rem; }
    h2 { font-size: 1.6rem; }
    h3 { font-size: 1.22rem; }
    h4 { font-size: 1.08rem; }
    .symbol { font-size: 1.1em; margin-left: 7px; color: #21d4fd; }
    .cta-button {
      display: block;
      margin: 26px auto 0 auto;
      background: linear-gradient(90deg, #21d4fd 0%, #b721ff 100%);
      color: #fff;
      font-family: 'Montserrat', sans-serif;
      font-weight: bold;
      font-size: 1.15rem;
      padding: 14px 34px;
      border: none;
      border-radius: 30px;
      box-shadow: 0 4px 18px #b721ff55;
      cursor: pointer;
      transition: background 0.23s, box-shadow 0.23s;
      text-decoration: none;
      text-align: center;
    }
    .cta-button:hover {
      background: linear-gradient(90deg, #b721ff 0%, #21d4fd 100%);
      color: #ffd200;
      box-shadow: 0 8px 32px #21d4fd88;
    }
    img.responsive {
      max-width: 100%;
      height: auto;
      border-radius: 10px;
      box-shadow: 0 2px 16px #21d4fd55;
      margin: 24px auto 0 auto;
      display: block;
    }
    footer {
      background: rgba(30,60,114,0.92);
      color: #ffd200;
      font-family: 'Montserrat', sans-serif;
      font-size: 1.08rem;
      text-align: center;
      padding: 30px 0 18px 0;
      margin-top: 60px;
      border-top: 4px solid #21d4fd;
      border-radius: 0 0 14px 14px;
      box-shadow: 0 -2px 18px #b721ff33;
    }
    .footer-links {
      margin-bottom: 16px;
    }
    .footer-links a {
      color: #21d4fd;
      text-decoration: none;
      margin: 0 16px;
      font-weight: bold;
      transition: color 0.2s;
    }
    .footer-links a:hover {
      color: #ffd200;
      text-shadow: 0 2px 8px #21d4fd;
    }
    @media (max-width: 600px) {
      main { padding: 18px 6px 18px 6px; }
      h1 { font-size: 1.38rem; }
      nav { gap: 8px; }
      .logo { font-size: 1.35rem; }
      .cta-button { padding: 11px 10px; font-size: 1rem; }
      footer { font-size: 0.98rem; }
    }