@import url('https://fonts.googleapis.com/css2?family=Roboto:wght@400;500;700&display=swap');
:root {
    --primary-color: #444444;
    --secondary-color: #fafafa;
    --tertiary-color: #2e2e2e;
    --quaternary-color: #666666;
}

body {
    margin: 0;
    padding: 0;
    font-family: 'Roboto', sans-serif;
    background-color: var(--tertiary-color);
    color: var(--secondary-color);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
}

table {
    border-collapse: collapse;
    min-width: 70%;
}

thead {
    background-color: var(--primary-color);
    color: var(--secondary-color);
}

th {
    padding: 2%;
}

th,
td {
    border: 1px solid var(--quaternary-color);
}

td {
    height: 70vh;
    position: relative;
}

.arrow,
.empty {
    background-color: var(--tertiary-color);
    border: none;
}

td div {
    position: absolute;
    right: 0;
    left: 0;
    background-color: var(--primary-color);
    display: flex;
    justify-content: center;
    align-items: center;
}