body {
      font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
      background: linear-gradient(135deg, 
                  #004e92 0%,   /* głęboki ocean granat */
                  #007991 35%, /* turkus - płytka woda */
                  #f9d29d 75%, /* piasek */
                  #f5f7a1 100% /* jasna wyspa */
                );
      min-height: 100vh;
      display: flex;
      justify-content: center;
      align-items: center;
      flex-direction: column;
      text-align: center;
      color: #ffffff;
      padding: 20px;
    }

    img.logo {
      width: clamp(100px, 20vw, 150px);
      margin-bottom: 20px;
    }

    h1 {
      font-size: clamp(2.2rem, 5vw, 3.8rem);
      font-weight: 700;
      margin-bottom: 15px;
      letter-spacing: 1px;
      color: #ffffff;
      text-shadow: 2px 2px 8px rgba(0,0,0,0.3);
    }

    p {
      font-size: clamp(1rem, 3.5vw, 1.3rem);
      margin-bottom: 40px;
      max-width: 650px;
      opacity: 0.95;
      color: #ffffff;
    }

    .btn {
      display: inline-block;
      margin: 10px;
      padding: 14px 36px;
      background: rgba(255,255,255,0.9);
      color: #004e92;
      text-decoration: none;
      font-weight: bold;
      border-radius: 8px;
      box-shadow: 0 4px 12px rgba(0,0,0,0.15);
      transition: all 0.3s ease;
      font-size: clamp(0.95rem, 2.5vw, 1.1rem);
    }

    .btn:hover {
      background: #004e92;
      color: #ffffff;
      transform: scale(1.05);
    }