:root {
    --bg-color:#575757;
    --button-bg: #ECEDE8;
    --button-hover-bg: #c4c5c0;
    --button-color: #1F1F1F;
    --button-font-size: 18px;
    --button-color-shadow:#C9CBC6;
    --calculator-color:#D6D7D2;
    --calculator-shadow-color:#bfc1bc;
    --screen-bg-color:#BFCBA6;
    --screen-color:#000000;
    --screen-border-color:#9FA39A;
}
/*font*/
@font-face{
    font-family: 'Digital-7';
    src: url('./sources/font/Seven\ Segment.ttf');
    font-weight: normal;
    font-style: normal;
}
@font-face{
    font-family:'Casio';
    src: url('./sources/font/Eurostar\ Black.ttf');
}
/*General styles*/

body{
    background: var(--bg-color);
    color: #fff;
    margin:0 auto;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    background-image:url(./sources/img/table.webp)
}

.calculator{
    background-color:var(--calculator-color);
    border-radius:15px;
    padding:20px;
    position:relative;
    
    padding-bottom:40px;
    .topcalc{
        display: flex;
        justify-content: space-between;
        align-items: center;
        margin-bottom: 10px;
        .brand{
            width: 10%;
            color:#3b3b3b !important;
            font-family: 'Casio', sans-serif;
            font-weight: 900;
            font-size: 24px;
            color: var(--button-color);
            margin-bottom: 10px;
        }
        .clock{
            border:2px solid var(--screen-border-color);
            background-color: var(--screen-bg-color);
            border-radius:5px;
            padding: 8px;
            display: flex;
            justify-content: flex-end;
            align-items: center;
            color: var(--button-color);
            font-family: 'Digital-7', monospace;
            margin-bottom: 10px;
            .hour, .min, .sec, .msec{
                font-size: 18px;
                margin: 0 2px;
            }
        }
    }

    .screen{
        border:2px solid var(--screen-border-color);
        background-color: var(--screen-bg-color);
        height: 60px;
        padding: 8px 8px 0 0;
        margin:0 auto;
        margin-bottom: 15px;
        text-align: right;
        border-radius: 5px;
        color: rgb(0, 0, 0);
        font-size: 24px;
        font-family: 'Digital-7', monospace;
        box-shadow: inset 2px 2px 5px rgba(0,0,0,0.2);

    }
    .grid{
        display:grid;
        grid-template-columns: repeat(4, 1fr);
    }
    .btn{
        background-color: var(--button-bg);
        color: var(--button-color);
        font-size: var(--button-font-size);
        border: none;
        border-radius: 5px;
        box-shadow: 4px 4px 0px var(--button-color-shadow);
        width: 50px;
        height: 40px;
        margin: 5px;
        cursor: pointer;
        transition: background-color 0.3s, box-shadow 0.1s, transform 0.1s;
        &:hover{
            background-color: var(--button-hover-bg);
        }

    }
            #clear{
            background-color: var(--button-color);
            color: white;
        }
            #delete{
            background-color: var(--button-color);
            color: white;}

            .btn:nth-child(16){
            background-color: rgb(250, 91, 91);
            color: white;
            grid-row-start: 4;
            grid-row-end: 6;
            grid-column-start: 4;
            height: 90%;
        }

        #equal{
            color:rgb(255, 255, 255);
            background-color: rgb(21, 159, 240);
            grid-column-start:-4;
            grid-column-end:-2;
            width:90%;
        }
}

    .calculator:after{
        position:absolute;
        content:'';
        inset:0px;
        border-radius: 15px;
        box-sizing: border-box;
        border-right:solid 6px rgb(41, 41, 41);
        border-bottom:solid 6px rgb(41, 41, 41);
        pointer-events:none;
    }