* {
    margin: 0;
    padding: 0;
}

@font-face {
    font-family: digital;
    src: url(font/Digital7-1e1Z.ttf);
}

body {
    background-image: url(background/memphis-mini.png);
    background-position: center;
}

/* container */
.container {
    background-color: #7ed6df;
    max-width: 500px;
    margin: 80px auto;
    padding: 18px;
    box-sizing: border-box;
    /* border: 1px solid #22a6b3; */
    border-radius: 5px;
    box-shadow: 5px 5px 6px lightgrey;
}

/* wadah output */
.container .output-number {
    background-color: white;
    height: 100px;
    font-size: 55px;
    margin: auto;
    position: relative;
    overflow-y: hidden;
    font-family: digital;
    /* border: 1px solid #30336b; */
    color: #2f3542;
    border-radius: 5px;
    padding: 5px;
    box-sizing: border-box;
}

.container .output-number span {
    position: absolute;
    bottom: 15px;
    right: 12px;
    /* background-color: aqua; */
}

/* grid all button  */
.container .button-number .sama-dengan          { grid-area: samadengan; background-color: #22a6b3; color: white;}
.container .button-number .sama-dengan:hover    { background-color: #209ba7;}

.container .button-number .tambah               { grid-area: tambah; background-color: #22a6b3; color: white;}
.container .button-number .tambah:hover         { background-color: #209ba7;}

.container .button-number .bagi                 { grid-area: bagi; background-color: #22a6b3; color: white;}
.container .button-number .bagi:hover           { background-color: #209ba7;}

.container .button-number .koma                 { grid-area: koma; background-color: #22a6b3; color: white;}
.container .button-number .koma:hover           { background-color: #209ba7;}

.container .button-number .persen               { grid-area: persen; background-color: #22a6b3; color: white;}
.container .button-number .persen:hover         { background-color: #209ba7;}

.container .button-number .kurang               { grid-area: kurang; background-color: #22a6b3; color: white;}
.container .button-number .kurang:hover         { background-color: #209ba7;}

.container .button-number .kali                 { grid-area: kali; background-color: #22a6b3; color: white;}
.container .button-number .kali:hover           { background-color: #209ba7;}

.container .button-number .clear                { grid-area: clear; background-color: #22a6b3; color: white;}
.container .button-number .clear:hover          { background-color: #209ba7;}

.container .button-number .nol                  { grid-area: nol;}
.container .button-number .nol:hover            { background-color: #dff9fb;}

.container .button-number .sembilan         { grid-area: sembilan;}
.container .button-number .sembilan:hover   { background-color: #dff9fb;}

.container .button-number .delapan          { grid-area: delapan;}
.container .button-number .delapan:hover    { background-color: #dff9fb;}

.container .button-number .tujuh            { grid-area: tujuh;}
.container .button-number .tujuh:hover      { background-color: #dff9fb;}

.container .button-number .enam             { grid-area: enam;}
.container .button-number .enam:hover       { background-color: #dff9fb;}

.container .button-number .lima             { grid-area: lima;}
.container .button-number .lima:hover       { background-color: #dff9fb;}

.container .button-number .empat            { grid-area: empat;}
.container .button-number .empat:hover      { background-color: #dff9fb;}

.container .button-number .tiga             { grid-area: tiga;}
.container .button-number .tiga:hover       { background-color: #dff9fb;}

.container .button-number .dua              { grid-area: dua;}
.container .button-number .dua:hover        { background-color: #dff9fb;}

.container .button-number .satu             { grid-area: satu;}
.container .button-number .satu:hover       { background-color: #dff9fb;}

/* tombol button number dan lain" */
.container .button-number {
    padding: 7px 15px;
    box-sizing: border-box;
    margin-top: 15px;
    display: grid;
    grid-template-columns: 25% 25% 25% 25%;
    grid-template-rows: 40px 40px 40px 40px 40px;
    column-gap: 6px;
    row-gap: 6px;
    justify-content: center;
    grid-template-areas: 'clear persen koma bagi'
                         'satu dua tiga kali'
                         'empat lima enam kurang'
                         'tujuh delapan sembilan tambah' 
                         'nol samadengan samadengan samadengan';
}

/* button */
.container .button-number button {
    cursor: pointer;
    font-size: 20px;
    font-family: sans-serif;
    border: none;
    background-color: white;
    border-radius: 5px;
    color: #2f3542;
}

/* responsive */
@media screen and (max-width: 600px) {
    .container {
        width: 80%;
    }
}