body{font-family:'Arial',sans-serif;display:flex;justify-content:center;align-items:center;flex-direction:column;height:100vh;margin:0;background:linear-gradient(to right,#4facfe,#00f2fe);color:white;text-align:center;padding:20px}h1{margin-bottom:30px;font-size:56px;text-shadow:2px 2px 20px rgb(0 0 0);letter-spacing:1.5px}h2{margin-bottom:30px;font-size:46px;text-shadow:2px 2px 20px rgb(0 0 0);letter-spacing:1.5px;animation:colorShift 4.5s ease-in-out infinite;}@keyframes colorShift{0%{color:#ff3333;}33%{color:#ffcc00;}66%{color:#33cc33;}100%{color:#000000;}}.button{display:block;width:80%;max-width:400px;padding:15px;margin:10px auto;font-size:20px;color:white;text-decoration:none;border-radius:10px;transition:background-color 0.3s,transform 0.2s,box-shadow 0.3s;text-align:center;box-shadow:0 6px 12px rgba(0,0,0,0.3);border:1px solid transparent;}.green{background-color:#3DDC84}.blue{background-color:#007BFF}.pink{background-color:#FF6F91}.pk{background-color:#e14949;}.button:hover{opacity:0.9;transform:translateY(-4px);box-shadow:0 8px 16px rgba(0,0,0,0.4);border:1px solid white;}@media(max-width:600px){h1{font-size:28px}.button{padding:12px;font-size:18px}}