.pad{display:grid;grid-template-columns:repeat(4,1fr);grid-gap:3px;width:88%;height:9em}button{border:none;border-radius:3px;background-color:#292933;color:#ebebeb;padding:3px}button:hover{background-color:#464650}.operation-button{background-color:#01379c;color:#000}.operation-button:hover{background-color:#114ab4}#clear{grid-column:1/3}#equal{grid-column:3/5}.visor{display:flex;flex-direction:column;align-items:end;justify-content:end;color:#f0f8ff;width:82%;height:2.5em}.fixed{color:#a0a0a0}.app{display:flex;flex-direction:column;align-items:center;justify-content:center;background-color:#18181a;max-width:200px;min-width:150px;max-height:300px;min-height:200px;transform:scale(2.5);margin:2em;border:none;border-radius:6px}body{display:flex;align-items:center;justify-content:center;margin:0;padding:0;width:100%;height:100vh;background-color:#a7b4be}