*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;background-color:#f5f5f5;color:#333}.App{min-height:100vh;display:flex;flex-direction:column}.main-content{flex:1;padding:20px;width:100%;overflow-x:hidden}h1,h2,h3,h4,h5,h6{margin-bottom:.5em;font-weight:600}a{color:#1976d2;text-decoration:none}a:hover{text-decoration:underline}button{cursor:pointer;padding:8px 16px;border:none;border-radius:4px;background-color:#1976d2;color:#fff;font-size:14px;transition:background-color .2s}button:hover{background-color:#1565c0}button:disabled{background-color:#ccc;cursor:not-allowed}input,select,textarea{padding:8px;border:1px solid #ddd;border-radius:4px;font-size:14px;width:100%;margin-bottom:16px}input:focus,select:focus,textarea:focus{outline:none;border-color:#1976d2}