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

        body {
            height: 100vh;
            font-family: 'Arial', sans-serif;
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            background: linear-gradient(45deg, #ff6b6b, #4ecdc4, #45b7d1, #96ceb4, #feca57, #ff9ff3);
            background-size: 400% 400%;
            animation: gradientShift 8s ease infinite;
            overflow: hidden;
        }

        @keyframes gradientShift {
            0% {
                background-position: 0% 50%;
            }
            50% {
                background-position: 100% 50%;
            }
            100% {
                background-position: 0% 50%;
            }
        }

        .hello-world {
            font-size: 4rem;
            font-weight: bold;
            color: white;
            text-shadow: 0 0 20px rgba(255, 255, 255, 0.8),
                         0 0 40px rgba(255, 255, 255, 0.6);
            margin-bottom: 2rem;
            animation: bounce 2s ease-in-out infinite,
                       glow 3s ease-in-out infinite alternate,
                       rainbow 6s linear infinite;
            cursor: pointer;
            transition: transform 0.3s ease;
        }

        .hello-world:hover {
            transform: scale(1.1);
        }

        @keyframes bounce {
            0%, 20%, 50%, 80%, 100% {
                transform: translateY(0);
            }
            40% {
                transform: translateY(-20px);
            }
            60% {
                transform: translateY(-10px);
            }
        }

        @keyframes glow {
            from {
                text-shadow: 0 0 20px rgba(255, 255, 255, 0.8),
                           0 0 40px rgba(255, 255, 255, 0.6),
                           0 0 60px rgba(255, 255, 255, 0.4);
            }
            to {
                text-shadow: 0 0 30px rgba(255, 255, 255, 1),
                           0 0 60px rgba(255, 255, 255, 0.8),
                           0 0 90px rgba(255, 255, 255, 0.6);
            }
        }

        @keyframes rainbow {
            0% { color: #ff6b6b; }
            16% { color: #4ecdc4; }
            32% { color: #45b7d1; }
            48% { color: #96ceb4; }
            64% { color: #feca57; }
            80% { color: #ff9ff3; }
            100% { color: #ff6b6b; }
        }

        .profile-button {
            padding: 15px 30px;
            font-size: 1.2rem;
            color: white;
            background: rgba(255, 255, 255, 0.2);
            border: 2px solid white;
            border-radius: 50px;
            text-decoration: none;
            backdrop-filter: blur(10px);
            box-shadow: 0 8px 32px rgba(31, 38, 135, 0.37);
            transition: all 0.3s ease;
            animation: float 3s ease-in-out infinite,
                       shimmer 2s linear infinite;
            position: relative;
            overflow: hidden;
        }

        .profile-button::before {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
            transition: left 0.5s;
        }

        .profile-button:hover::before {
            left: 100%;
        }

        .profile-button:hover {
            transform: translateY(-5px) scale(1.05);
            box-shadow: 0 15px 45px rgba(31, 38, 135, 0.5);
            background: rgba(255, 255, 255, 0.3);
        }

        @keyframes float {
            0%, 100% {
                transform: translateY(0px);
            }
            50% {
                transform: translateY(-10px);
            }
        }

        @keyframes shimmer {
            0% {
                border-color: rgba(255, 255, 255, 0.8);
            }
            50% {
                border-color: rgba(255, 255, 255, 1);
            }
            100% {
                border-color: rgba(255, 255, 255, 0.8);
            }
        }

        .particles {
            position: absolute;
            width: 100%;
            height: 100%;
            pointer-events: none;
            z-index: 1;
        }

        .particle {
            position: absolute;
            background: rgba(255, 255, 255, 0.6);
            border-radius: 50%;
            animation: float-particles linear infinite;
        }

        @keyframes float-particles {
            from {
                transform: translateY(100vh) rotate(0deg);
                opacity: 1;
            }
            to {
                transform: translateY(-100px) rotate(360deg);
                opacity: 0;
            }
        }

        .content {
            z-index: 2;
            position: relative;
            display: flex;
            flex-direction: column;
            align-items: center;
        }