body{
    margin:0;
    height:100vh;
    display:flex;
    justify-content:center;
    align-items:center;
    background:#0a0a0a;
    font-family:Arial;
}

.calculator{
    width:340px;
    padding:20px;
    border-radius:25px;
    background: rgba(20,20,20,0.8);
    box-shadow: 0 0 30px rgba(0,255,255,0.08);
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
}

.display{
    height:80px;
    background:#000;
    color:#00ffe1;
    font-size:32px;
    text-align:right;
    padding:20px;
    border-radius:15px;
    margin-bottom:20px;
    box-shadow: inset 0 0 10px rgba(0,255,225,0.2);
    overflow:hidden;
}

.buttons{
    display:flex;
    gap:10px;
}

.numbers{
    display:grid;
    grid-template-columns:repeat(3,1fr);
    gap:10px;
    flex:3;
}

.operators{
    display:grid;
    grid-template-rows:repeat(5,1fr);
    gap:10px;
    flex:1;
}

button{
    border:none;
    height:60px;
    border-radius:15px;
    font-size:18px;
    cursor:pointer;
    background:#1c1c1c;
    color:white;
    transition:0.25s;
}

button:hover{
    transform:translateY(-3px);
    box-shadow:0 0 15px rgba(0,255,225,0.3);
}

.num{
    background:#222;
}

.op{
    background:#111;
    color:#00ffe1;
}

.equal{
    background:linear-gradient(45deg,#00ffe1,#00b3ff);
    color:black;
    font-weight:bold;
}