body{background-color:#333;color:#eee;font-family:Arial,sans-serif}button{background-color:#555;color:#eee;padding:8px 15px;border:none;border-radius:4px;cursor:pointer;font-size:1em;transition:background-color .2s ease}button:hover{background-color:#777}button:disabled{background-color:#444;cursor:not-allowed;color:#888}input[type=text],input[type=number],input[type=password],select,textarea{padding:8px;border:1px solid #555;border-radius:4px;font-size:1em;background-color:#444;color:#eee}a{color:#8cf;text-decoration:none}a:hover{text-decoration:underline}.error{color:#f88;font-weight:700}