.kwiskalender-wrapper {
    max-width: 600px;
    margin: 20px auto;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

.kwiskalender-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.kwis-nav-btn {
    background: #2271b1;
    color: white;
    border: none;
    padding: 10px 20px;
    font-size: 18px;
    cursor: pointer;
    border-radius: 4px;
}

.kwis-nav-btn:hover {
    background: #135e96;
}

.kwis-nav-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

#kwis-month-year {
    margin: 0;
    font-size: 24px;
}

#kwiskalender-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 5px;
}

.kwis-day-header {
    padding: 10px;
    text-align: center;
    font-weight: bold;
    background: transparent;
}

.kwis-day {
    aspect-ratio: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid #ddd;
    background: transparent;
    font-size: 20px;
    font-weight: bold;
}

.kwis-day.empty {
    border: none;
    background: transparent;
}

.kwis-day.booked {
    background: #E8B923;
    color: #000;
    position: relative;
}

.kwis-day.booked::after {
    content: '❌';
    position: absolute;
    font-size: 40px;
    opacity: 0.8;
}