Template:Anniversary box/styles.css

.anniversary-box {
  display: flex;
  flex-flow: column nowrap;
  margin: 10px auto;
  max-width: 400px;
  background: #fff;
  border: 1px solid #333;
}
.anniversary-box-header {
  display: flex;
  flex-flow: row nowrap;
  text-align: center;
  align-items: center;
  width: 100%;
  border-top: 10px solid #D32F2F;
}
.anniversary-box-current {
  font-size: 1.1rem;
  font-weight: bold;
}
.anniversary-box-last, .anniversary-box-current, .anniversary-box-next {
    flex: 1 1;
}
.anniversary-box-dates ul {
    margin: 0;
    padding: 0;
    list-style: none;
    display: grid;
    grid-template-columns: repeat(7, 1fr);
}
.anniversary-box-dates li {
    margin: 0;
    padding: 0;
}
.anniversary-box-dates li a {
    display: block;
    padding: 0.4rem 0.6rem;
    font-weight: bold;
    text-decoration: none;
    transition: 100ms ease-in;
    text-align: center;
}
.anniversary-box-dates li:nth-child(-n+7) {
    border-top: 1px solid #bbb;
}

.anniversary-box-dates li {
    border-right: 1px solid #bbb;
}
.anniversary-box-dates li:not(:nth-child(29)):not(:nth-child(30)):not(:nth-child(31)) {
    border-bottom: 1px solid #bbb;
}
.anniversary-box-dates li:nth-child(7n+1) {
    border-left: 0;
}
.anniversary-box-dates li:nth-child(7n) {
    border-right: 0;
}
.anniversary-box-dates li a:hover {
    color: #fff !important;
    background-color: #bbb;
}
.anniversary-box-dates li a.selflink {
    background-color: #bbb;
    color: #fff;
}