body {
    font-family: Arial, sans-serif;
    background-color: #f0f0f0;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
    padding: 20px;
    box-sizing: border-box;
}

.adventskalender {
    text-align: center;
    width: 100%;
    max-width: 800px;
}

h1 {
    color: #333;
    margin-bottom: 20px;
}

#kalender {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 15px;
    margin: 0 auto;
}

.tuer {
    background-color: #ff6b6b;
    color: white;
    padding: 20px;
    border-radius: 10px;
    cursor: pointer;
    transition: transform 0.3s ease, background-color 0.3s ease;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    min-height: 100px;
}

.tuer:hover {
    transform: scale(1.05);
}

.tuer.offen {
    background-color: #4ecdc4;
}

.tuer img {
    max-width: 100%;
    height: auto;
    border-radius: 5px;
    margin-top: 10px;
}

.tuer p {
    margin-top: 10px;
    font-size: 14px;
}

@media (max-width: 600px) {
    #kalender {
        grid-template-columns: repeat(2, 1fr);
    }
}