body {
    font-family: Verdana;
    margin: 16px;
}

.header-container {
    display: flex;
    align-items: center;
    margin-bottom: 20px;
}

.header-container img {
    max-height: 80px;
    margin-right: 20px;
}

.header-container h1 {
    margin: 0;
    font-size: 24px;
}

.date-row {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    max-width: 340px;
    margin-bottom: 20px;
}

.date-button {
    padding: 12px 16px;
    font-size: 16px;
    font-family: inherit;
    cursor: pointer;
    text-align: left;
}

.calendar {
    display: none;
    margin-top: 8px;
    padding: 12px;
    border: 1px solid #ccc;
    background: #fff;
}

.calendar.open {
    display: block;
}

.calendar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 8px;
}

.calendar-title {
    font-size: 16px;
    font-weight: bold;
    text-transform: capitalize;
}

.calendar-nav {
    min-width: 44px;
    min-height: 44px;
    font-size: 20px;
    cursor: pointer;
}

.calendar-weekdays,
.calendar-days {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 4px;
    text-align: center;
}

.calendar-weekdays {
    margin-bottom: 4px;
    font-size: 12px;
    color: #555;
}

.calendar-day {
    min-height: 44px;
    padding: 0;
    font-size: 16px;
    font-family: inherit;
    background: #f4f4f4;
    border: 0;
    cursor: pointer;
}

.calendar-day.empty {
    background: transparent;
    cursor: default;
}

.calendar-day.today {
    outline: 1px solid #666;
}

.calendar-day.selected {
    background: #1a73e8;
    color: #fff;
}

.calendar-day:disabled {
    color: #bbb;
    background: transparent;
    cursor: default;
}

.download-table {
    display: table;
    width: 100%;
    max-width: 340px;
}

.download-row {
    display: table-row;
}

.download-cell {
    display: table-cell;
    padding: 5px 10px;
    vertical-align: middle;
}

.download-button {
    padding: 10px 20px;
    font-size: 16px;
    cursor: pointer;
}

#copyStatus {
    color: green;
    font-weight: bold;
    margin-top: 10px;
}