/* Google Font */
@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;500;600&display=swap');

*{
    margin:0;
    padding:0;
    box-sizing:border-box;
    font-family: "Poppins", sans-serif;
}

body{
    height:100vh;
    display:flex;
    justify-content:center;
    align-items:center;
    background: linear-gradient(135deg,#0f2027,#203a43,#2c5364);
}

/* Calculator Container */
.calculator{
    backdrop-filter: blur(20px);
    background: rgba(255,255,255,0.05);
    padding:25px;
    border-radius:20px;
    box-shadow:0 20px 40px rgba(0,0,0,0.4);
}

/* Display */
.calculator input{
    width:100%;
    height:70px;
    border:none;
    outline:none;
    text-align:right;
    font-size:28px;
    padding:15px;
    margin-bottom:20px;
    border-radius:12px;
    background: rgba(255,255,255,0.1);
    color:white;
}

/* Button grid */
.buttons{
    display:grid;
    grid-template-columns:repeat(4,85px);
    gap:12px;
}

/* Buttons */
button{
    height:60px;
    border:none;
    border-radius:12px;
    font-size:18px;
    cursor:pointer;
    transition:0.2s;
    background: rgba(255,255,255,0.08);
    color:white;
    box-shadow:0 4px 10px rgba(0,0,0,0.2);
}

/* Hover effect */
button:hover{
    transform:translateY(-3px);
    background: rgba(255,255,255,0.15);
}

/* Operator buttons */
.operator{
    background:linear-gradient(135deg,#ff9966,#ff5e62);
}

/* Equal button */
.equal{
    background:linear-gradient(135deg,#00c6ff,#0072ff);
}

/* Special buttons */
.special{
    background:linear-gradient(135deg,#f7971e,#ffd200);
    color:black;
}