* {
  box-sizing: border-box;
}

.calendario_linha {
  display: flex;
}

.calendario_coluna {
    flex: 50%;
    padding: 5px;
}

.event-summary-row {
    font-family:Verdana,sans-serif;
    font-size:12px;
    line-height:1;
}

.dia_evento, .event-summary-row {
    background-color:green;
}