/* variables */
:root{
    --bg-color:#000000;
    --sebg-color:#292727;
    --text-color:#fff;
    --button-color:#0066ff;
}
*{
    padding:0;
    margin: 0;
    box-sizing: border-box;
    font-family: "Nunito", sans-serif;
    font-optical-sizing: auto;
    font-weight:700;
    font-style:normal;
}
html,body{width:100%; height:100%;}
body{
    background:linear-gradient(530deg ,var(--text-color),var(--button-color));
    color: var(--text-color);
    display: flex;
    justify-content: center;
    align-items: center;
    height:97vh;
    max-height:100vh;
}
main{
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    border:1px solid var(--text-color);
    width:19rem;
    padding:20px;
    border-radius:10px;
    box-shadow:10px 10px 20px var(--button-color);
}
aside{
    display: flex;
    flex-direction: column;
    gap:10px;
    align-items:end;
    width:100%;
    height:13vh;
}
aside input{
    width:100%;
    height:70%;
    max-width:auto;
    font-size:40px;
    text-align: end;
    color: var(--bg-color);
    background:transparent;
    border-radius:10px;
    padding:10px;
    border:1px solid var(--button-color);
    transition: all 0.3s ease;
    box-shadow:0px 0px 2px var(--text-color);
    caret-color:blue;
    caret-shape:none;
}
aside input:focus{
    outline:none;
    border:1px solid var(--button-color);
}
aside input:hover{
    transform: scale(1.1);
}
article{
    display:grid;
    grid-template-columns:repeat(4,1fr);
    grid-auto-rows:70px;
    gap:10px;
    width:280px;
}
article button{
    font-size:20px;
    border-radius:10px;
    border:none;
    cursor: pointer;
    background: transparent;
    border:1px solid var(--text-color);
    transition: all 0.3s ease;
    backdrop-filter:blur(6px);
    box-shadow:0px 0px 4px var(--text-color);
}
article button:hover{
    transform:translateY(-8px);
}
button:active{
    scale:0.9;
}
article button.equal{
    grid-column:span 2;
}
.whiteColor{
    color:var(--text-color);
}