* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', sans-serif;
}

body {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: #0f172a; 
    background-image: radial-gradient(circle at 10% 20%, rgba(99, 102, 241, 0.2) 0%, transparent 20%),
                      radial-gradient(circle at 90% 80%, rgba(168, 85, 247, 0.2) 0%, transparent 20%);
}

.wrapper {
    width: 450px;
    background: rgba(30, 41, 59, 0.6);
    backdrop-filter: blur(15px);
    border-radius: 24px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    padding: 25px;
    color: #fff;
}

header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 10px 20px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.current-date {
    font-size: 1.6rem;
    font-weight: 600;
    letter-spacing: -0.5px;
}

.icons span {
    height: 38px;
    width: 38px;
    margin: 0 2px;
    cursor: pointer;
    text-align: center;
    line-height: 38px;
    font-size: 1.9rem;
    color: #94a3b8;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 50%;
    user-select: none;
    transition: all 0.3s ease;
}

.icons span:hover {
    background: rgba(255, 255, 255, 0.15);
    color: #fff;
}

.calendar {
    padding-top: 20px;
}

.calendar ul {
    display: flex;
    flex-wrap: wrap;
    list-style: none;
    text-align: center;
}

.calendar .weeks li {
    font-weight: 500;
    width: calc(100% / 7);
    color: #94a3b8;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.calendar .days {
    margin-top: 15px;
}

.calendar .days li {
    width: calc(100% / 7);
    margin-top: 5px;
    position: relative;
    z-index: 1;
    cursor: pointer;
    font-size: 1rem;
    height: 45px;
    line-height: 45px;
    border-radius: 12px;
    transition: all 0.2s ease;
}


.days li.inactive {
    color: #475569;
    pointer-events: none;
}


.days li.active {
    color: #fff;
    background: #6366f1; 
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.4);
}

.days li.active::before {
    content: "";
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 100%;
    height: 100%;
    border-radius: 12px;
    z-index: -1;
}


.days li:not(.active):not(.inactive):hover {
    background: rgba(255, 255, 255, 0.1);
}