* {
    padding: 0px;
    margin: 0px;
    box-sizing: border-box;
}

body {
    display: flex;
    flex-direction: column;
}

#toolbar {
    flex-grow: 0;
    border-bottom: 4px black solid;
    padding: 4px 8px;
}

#toolbar button {
    border: 1px gray solid;
    background-color: white;
    border-radius: 4px;
    padding: 2px;
    margin-right: 8px;
}

#toolbar button:hover {
    background-color: #DDD;
}

#toolbar button:active {
    background-color: #EEE;
    border-color: black;
}

#sheetArea {
    display: grid;
    width: fit-content;
    grid-template-columns: 1fr 1fr;
    grid-template-rows: 1fr 1fr;
}

#spreadsheet {
    flex-grow: 1;
    padding: 8px
}

#spreadsheet #sheet {
    border-collapse: collapse;
    width: fit-content;
    border-left: black 1px solid;
    border-top: black 1px solid;
}

#spreadsheet #sheet tr {
    border-collapse: collapse;
}

#spreadsheet #sheet tr td {
    border-collapse: collapse;
    padding: 2px;
    border-right: black 1px solid;
    border-bottom: black 1px solid;
}

#data {
    display: none;
}