*,
html {
  box-sizing: border-box;
}
body {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  height: 100vh;
  margin: 0;
  overflow: hidden;
  background-color: #f4f4f4;
  background-image: url("./matching-background.jpg");
}
.container {
  background-color: white;
  border-radius: 10px;
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
  width: 50em;
  height: 50em;
  position: relative;
  overflow: hidden;
  background: url("./1997.108_bird4.jpg") no-repeat bottom right;
}
.month {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px;
  background-color: #3a3a3a;
  color: white;
}
.month-name {
  font-size: 1.2em;
}
.weekdays {
  display: flex;
  background-color: #ddd;
}
.weekdays div {
  flex: 1;
  text-align: center;
  padding: 10px 0;
  font-weight: 900;
}
.days {
  display: flex;
  flex-wrap: wrap;
}
.day {
  width: calc(100% / 7);
  height: 8em;
  text-align: center;
  padding: 35px 0;
  border: 4px solid #ddd;
  box-sizing: border-box;
  font-weight: 900;
}