* {
    padding: 0;
    margin: 0;
    box-sizing: border-box;
  }
  body {
    background: linear-gradient(to left, #283593, #1976d2);
    height: 100vh;
    font-size: 24px;
    font-family: "Josefin Sans", sans-serif;
    display: flex;
    align-items: center;
    justify-content: center;
  }
  .calendar {
    position: relative;
    height: 370px;
    width: 450px;
    border-radius: 25px;
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(30px);
    border: 2px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 0 80px rgba(0, 0, 0, 0.2);
    overflow: hidden;
  }
  .calendar__header {
    display: flex;
    justify-content: space-between;
    align-content: center;
    padding: 15px 20px 25px;
    color: #fff;
    font-weight: bold;
  }
  .calendar__btns {
    display: flex;
    column-gap: 20px;
  }
  .calendar__btn {
    background: none;
    border: none;
    cursor: pointer;
    transition: opacity 0.1s;
  }
  .calendar__btn img {
    width: 20px;
    height: 20px;
  }
  .calendar__btn:hover {
    opacity: 0.7;
  }
  .calendar__day-names,
  .calendar__days {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    text-align: center;
    color: #fff;
    justify-items: center;
    margin-bottom: 10px;
  }
  .calendar__day-names span {
    font-size: 16px;
  }
  .calendar__days {
    row-gap: 5px;
  }
  .calendar__days span:not(.calendar__days-hidden) {
    cursor: pointer;
    width: 40px;
    height: 40px;
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    border-radius: 50%;
    transition: background-color 0.1s;
  }
  .calendar__days span.today {
    background-color: #3498db;
    color: #fff;
    font-weight: bold;
    border-radius: 50%;
  }
  .calendar__days span:not(.calendar__days-hidden):hover {
    background-color: #3498db;
  }
  .decors {
    position: absolute;
    height: 270px;
    width: 450px;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
  }
  .decor_1 {
    height: 200px;
    width: 200px;
    bottom: -90px;
    left: -90px;
    opacity: 0.8;
  }
  .decor_2 {
    height: 180px;
    width: 180px;
    top: -100px;
    right: -60px;
  }