body {
    font-family: sans-serif;
    padding: 16px;
    background: #f4f4f4;
}

input,
textarea,
button {
    width: 100%;
}

.calendar-header {
    margin-bottom: 10px;
    display: flex;
    justify-content: space-between;
    margin-bottom: 10px;
    white-space: nowrap;
    gap: 6px;
    align-items: center;
}

#calendar {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 6px;
    margin-bottom: 10px;
}

.day {
    background: #fff;
    padding: 10px;
    border-radius: 6px;
    text-align: center;
    cursor: pointer;
}

.day.active {
    background: #4CAF50;
    color: white;
}

#note {
    height: 250px;
    margin-bottom: 10px;
}

.logout-link {
    display: inline-block;
    width: 30px;
    height: 20px;
    background:
        linear-gradient(-45deg, transparent calc(50% - 1px), black, transparent calc(50% + 1px)),
        linear-gradient(45deg, transparent calc(50% - 1px), black, transparent calc(50% + 1px))
}