:root{--background-color: #1a1a1a;--border-color: #646cff;--border-color-hover: #8585ff;--border-radius: 8px;--font-size: 12pt;--transition-duration: .3s;--padding: 10px;--box-shadow: 0 2px 5px rgba(0, 0, 0, .2)}body{background-color:var(--background-color);color:#ccc;font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif}#app{display:flex;flex-direction:column;align-items:center;justify-content:center;height:100vh;gap:20px}