.calculator{width:90%;margin:0 auto;padding:80px 20px}.toggle-button{position:fixed;right:5px;bottom:120px;background:#39c;color:#fff;border:none;border-radius:10px;padding:10px;width:50px;height:140px;text-align:center;font-size:14px;font-weight:700;cursor:pointer;z-index:9999;display:flex;align-items:center;justify-content:center;gap:5px;-webkit-writing-mode:vertical-rl;writing-mode:sideways-lr;-webkit-text-orientation:mixed}.close-button{position:absolute;top:5px;right:5px;background:red;color:#fff;border:none;border-radius:50%;width:20px;height:20px;font-size:12px;text-align:center;cursor:pointer}@media (max-width:768px){.toggle-button{display:none}}