*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Poppins', sans-serif;
}
body {
    display: flex;
    align-items: center;
    padding: 0 10px;
    justify-content: center;
    min-height: 100vh;
    background: #0cf1de;
}
.wrapper {
    width: 450px;
    background: #fff;
    border-radius: 10px;
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.12);
}
.wrapper header {
    display: flex;
    align-items: center;
    padding: 25px 30px 10px;
    justify-content: space-between;
}

header .icons{
    display: flex;
}
header .icons span {
    height: 38px;
    width: 38px;
    margin: 0 1px;
    cursor: pointer;
    color: #878787;
    text-align: center;
    line-height: 38px;
    font-size: 1.9rem;
    user-select: none;
    border-radius: 50%;
}
.icons span:last-child {
    margin-right: -10px;
}
header .icons span:hover{
    background: #f2f2f2;
}
header .current-date {
    font-size: 1.45rem;
    font-weight: 500;

}

.calendar{
    padding: 20px;
}
.calendar ul {
    display: flex;
    flex-wrap: wrap;
    list-style: none;
    text-align: center;
}
.calendar .days{
    margin-bottom: 20px;
}
.calendar li{
    color: #333;
    width: calc(100% / 7);
    font-size: 1.07rem;
}
.calendar .weeks li{
    font-weight: 500;
    cursor: default;
}
.calendar .days li{
    z-index: 1;
    cursor: pointer;
    position: relative;
    margin-top: 30px;
}
.days li.inactive{
    color: #aaa;
}
.days li.active {
    color: #fff;
}
.days li::before {
    position: absolute;
    content: '';
    left: 50%;
    top: 50%;
    height: 40px;
    width: 40px;
    z-index: -1;
    border-radius: 50%;
    transform: translate(-50%, -50%);
}
.days li.active::before {
    background: #9B59B6;
}
.days li:not(.active):hover::before{
    background: #f2f2f2;
}