.container p,h1{color:#fff}.container{max-width:400px;margin:50px auto;padding:20px;background:rgba(0,0,0,.8);border-radius:10px;box-shadow:0 4px 8px rgba(0,0,0,.2);text-align:center}@media screen and (min-width:200px) and (max-width:600px){.container{width:92%}}h1{font-size:24px;margin-bottom:10px}.title-ke-niche{font-size:16px;margin-bottom:20px;line-height:1.5}.inputclass{width:84%;padding:10px;font-size:18px;border:2px solid #ddd;border-radius:5px;margin-bottom:20px}input[type=button]{width:60px;height:60px;margin:5px;font-size:18px;font-weight:700;border:2px solid #ddd;border-radius:5px;background:linear-gradient(135deg,#4caf50,#45a049);color:#fff;cursor:pointer;transition:.3s;box-shadow:0 4px rgba(0,0,0,.2)}input[type=button]:hover{background:linear-gradient(135deg,#45a049,#3e8e41)}input[type=button]:active{box-shadow:0 2px rgba(0,0,0,.4);transform:translateY(2px)}.btn-color{background:linear-gradient(135deg,#2196f3,#1e88e5)}.btn-color:hover{background:linear-gradient(135deg,#1e88e5,#1976d2)}.calculator_center{margin:0 auto;border-collapse:collapse;text-align:center}