*{box-sizing:border-box;padding:0;margin:0}body,html{max-width:100vw;overflow-x:hidden;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,sans-serif}body{background:#fff;color:#333;min-height:100vh}a{color:inherit;text-decoration:none}.container{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:100vh;padding:2rem;text-align:center}.card{background:#fff;border-radius:20px;padding:3rem 2rem;box-shadow:0 20px 60px rgba(0,0,0,.3);max-width:500px;width:100%;animation:slideUp .5s ease-out}@keyframes slideUp{0%{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}h1{font-size:2rem;margin-bottom:1rem;color:#667eea}p{margin-bottom:1.5rem;color:#666}.button,p{font-size:1.1rem}.button{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;border:none;padding:1rem 2rem;border-radius:50px;cursor:pointer;transition:transform .2s,box-shadow .2s;font-weight:600}.button:hover{transform:translateY(-2px);box-shadow:0 10px 30px rgba(102,126,234,.4)}.button:active{transform:translateY(0)}.spinner{border:3px solid #f3f3f3;border-top-color:#667eea;border-radius:50%;width:40px;height:40px;animation:spin 1s linear infinite;margin:2rem auto}@keyframes spin{0%{transform:rotate(0deg)}to{transform:rotate(1turn)}}.code{background:#f5f5f5;padding:1rem 2rem;border-radius:10px;font-size:1.5rem;font-weight:700;color:#667eea;margin:1.5rem 0;letter-spacing:2px}@media (max-width:600px){.card{padding:2rem 1.5rem}h1{font-size:1.5rem}p{font-size:1rem}}