body,html,#root{height:100%;margin:0}.app-container{height:100vh;display:flex;flex-direction:column;justify-content:center;align-items:center;text-align:center;background-color:#f5f7fa;font-family:Segoe UI,sans-serif;color:#1c2b36}h1{font-size:3rem;margin-bottom:1rem}p{font-size:1.25rem;margin-bottom:2rem}button{padding:.8rem 1.6rem;font-size:1rem;border:2px solid #1c2b36;border-radius:8px;background-color:#fff;cursor:pointer;transition:background-color .3s ease}button:hover{background-color:#e5e7eb}*{box-sizing:border-box;padding:0;margin:0}