.theme-classic{background-color:#c0c0c0;font-family:Tahoma,sans-serif;border:2px outset #fff;color:black}.theme-xp{background:linear-gradient(180deg,#e2eaf8,#a6c1ee);font-family:Segoe UI,sans-serif;border:2px outset #aac;color:black}.theme-dark{background-color:#121212;color:#e0e0e0;font-family:Arial,sans-serif;border:2px solid #444}.theme-classic button{background-color:#dcdcdc;border:2px outset #fff;color:black}.theme-xp button{background-color:#edf3fe;border:1px solid #aaa;color:black}.theme-dark button{background-color:#222;color:#fff;border:1px solid #555}.theme-dark button:disabled{background-color:#333;color:#999}button:hover{filter:brightness(1.05);cursor:pointer}body{margin:0;padding:0;transition:background-color .3s ease,color .3s ease}