.calendar-card {
    height: 100%;

    padding: 16px;
    margin: 16px;

    display: flex;
    flex-direction: column;

    border-radius: 16px;
    background-color: var(--card-bg);
}

/* calendar-header */
.calendar-header {
    margin-bottom: 2dvh;

    display: flex;
    justify-content: space-between;
    align-items: center;
}

.calendar-header button {
    font-size: var(--font-md);

    cursor: pointer;

    color: var(--main-text);

    border: none;
    background: none;
}

.month-contents {
    display: flex;
    align-items: center;
    justify-content: space-evenly;

    gap: 5px;
}

#calenderMonth, 
#calendarYear {
    display: flex;
    align-items: center;
    justify-content: center;

    font-weight: bold;

    color: var(--main-text);
}

#calenderMonth {
    width: 7dvh;
}

#calendarYear {
    width: 5dvh;
}

/* weekdays */
.calendar-weekdays {
    margin-bottom: 10px;

    display: grid;
    text-align: center;
    grid-template-columns: repeat(7,1fr);

    font-size: var(--font-xs);
}

/* calendar grid */
.calendar-grid {
    flex: 1;

    display: grid;
    grid-template-columns: repeat(7,1fr);
    grid-template-rows: repeat(6,1fr);
    
    gap: 4px;
}

.calendar-day {
    display: flex;
    justify-content: center;
    align-items: center;

    border-radius: 10px;
    cursor: pointer;
}

.calendar-day span {
    font-size: var(--font-xs);
}

.calendar-day:hover {
    background: var(--point-color);
}

/* modal */
.period-modal {
    position: fixed;
    inset: 0;

    display: none;
    justify-content: center;
    align-items: center;

    background-color: var(--dark-card-bg);

    padding: 15px;
}

.modal-content {
    width: 100%;

    padding: 20px;

    border-radius: 10px;
    background-color: var(--tip-bg);
}

.modal-content form {
    display: flex;
    flex-direction: column;

    gap: 10px;
}

.form-buttons {
    display: flex;
    justify-content: space-between;
}