#app{font-family:Arial,Helvetica,sans-serif;display:flex;flex-direction:column;min-height:100vh;justify-content:space-between}header{padding:10px;text-align:center}header h1{margin-top:1.5rem;margin-bottom:1.5rem;font-weight:400}main{flex-grow:1;padding:20px}footer{background-color:#f8f9fa;padding:10px;text-align:center;border-top:1px solid #ccc}