* {
  box-sizing: border-box;
}

@media (max-width: 576px) {
    .container {
        padding: 10px;
        margin-top: 100px;
    }
    .advent-calendar-container {
        width: 100% !important;
        height: auto !important;
    }
    .text {
        font-size: 2em !important;
    }
}

@media (min-width: 577px) {
    .container {
        padding: 100px;
    }
}
.advent-calendar-container {
    width: 800px;
    height: 900px;
    border: 5px solid black;
    margin: 15px auto;
    background-image: url("/img/advent-calendar/calendar.png");
    background-size: cover;
    box-shadow: 6px 6px 20px gray;
    display: grid;
    grid-template-columns: repeat(4, 25%);
    grid-template-rows: repeat(6, 1fr);
    grid-template-areas:
        "door9 door6 door11 door7"
        "door3 door20 door16 door2"
        "door14 door12 door19 door15"
        "door22 door1 door5 door23"
        "door17 door10 door24 door21"
        "door8 door18 door4 door13";
    background-position-x: center;
}

.image {
    background-image: none;
    background-size: cover;
    background-position: center;

}
.image-back {
    border: 5px solid #000000;
}

.text {
    height: 100%;
    width: 100%;
    color: #000000;
    padding: 10px;
    border: 2px solid black;
    transition: opacity 2.5s;
    font-size: 4em;
    text-align: center;
    padding-top: 30px;
    font-family: fantasy;
    text-shadow: #fff 1px 0 14px;
    font-weight: bold;
}

.post-link {
    width: 100%;
    height: 100%;
    display: block;
}

.overlay {
    position: relative;
    display: block;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,0.5);
    z-index: 2;
    cursor: not-allowed;
}