body {
    margin: 0;
    background-color: #333;
    display: flex;
    align-items: center;
    min-height: 100vh;
    user-select: none;
}

#main-container {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
    gap: 100px;
}

#left-panel {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    justify-content: center;
    width: 400px;
    height: 150px;
    position: relative;
    left: 80px;
}

#date-display {
    font-family: 'Inter', sans-serif;
    font-size: 1.3em;
    font-weight: 500;
    color: #777777;
    margin-bottom: 10px;
    height: 1.5em;
    position: relative;
    left: 5px;
}

#date-year, #date-month, #date-day {
    cursor: pointer;
}

#date-year.active, #date-month.active, #date-day.active {
    color: #f0f0f0;
}

#date-year.dimmed, #date-month.dimmed, #date-day.dimmed {
    color: #777;
    cursor: pointer;
}

#clock-container {
    font-family: 'Inter', sans-serif;
    font-size: 4em;
    color: #f0f0f0;
    font-weight: bold;
    font-variant-numeric: tabular-nums;
}

#clock-separator, #clock-second-separator {
    color: #777;
}

#clock-hour.dimmed, #clock-minute.dimmed {
    color: #777;
    cursor: pointer;
}

#clock-minute, #clock-hour, #clock-second {
    cursor: pointer;
}

#clock-second.dimmed {
    color: #777;
}

.hidden {
    visibility: hidden;
}

#grid-container {
    display: grid;
    grid-template-columns: repeat(40, 15px); /* Day view */
    grid-template-rows: repeat(36, 15px);    /* Day view */
    gap: 3px;
    width: 717px; /* 40*15px + 39*3px */
    height: 645px; /* 36*15px + 35*3px */
    justify-content: flex-end;
    align-content: center;
    position: relative;
    left: -80px;
}

#grid-container.hour-view {
    grid-template-columns: repeat(10, 15px); /* Hour view */
    grid-template-rows: repeat(6, 15px);     /* Hour view */
}

#grid-container.day-by-hour-view {
    grid-template-columns: repeat(6, 15px);
    grid-template-rows: repeat(4, 15px);
}

#grid-container.century-view {
    grid-template-columns: repeat(10, 15px);
    grid-template-rows: repeat(10, 15px);
}

#grid-container.second-view {
    grid-template-columns: repeat(60, 8px);
    grid-template-rows: repeat(60, 8px);
    gap: 1px;
}

#grid-container.second-view .grid-item {
    width: 8px;
    height: 8px;
    border-radius: 1px;
}

#grid-container.year-view {
    grid-template-columns: repeat(30, 15px);
    grid-template-rows: repeat(13, 15px);
}

#grid-container.year-by-month-view {
    grid-template-columns: repeat(4, 15px);
    grid-template-rows: repeat(3, 15px);
}

#grid-container.month-by-day-view {
    grid-template-columns: repeat(7, 15px);
    grid-template-rows: repeat(5, 15px);
}

.grid-item {
    position: relative;
    width: 15px;
    height: 15px;
    background-color: #555;
    border-radius: 3px;
    transition: background-color 0.5s ease;
    cursor: pointer;
}

.grid-item .tooltip {
    visibility: hidden;
    width: max-content;
    max-width: 200px;
    background-color: white;
    color: black;
    font-family: 'Inter', sans-serif;
    font-weight: 400;
    font-size: 12px;
    text-align: center;
    border-radius: 20px;
    padding: 5px 10px;
    position: absolute;
    z-index: 1;
    bottom: 150%;
    left: 50%;
    transform: translateX(-50%);
    opacity: 0;
    transition: opacity 0.3s;
}

.grid-item .tooltip::after {
    content: "";
    position: absolute;
    top: 100%;
    left: 50%;
    margin-left: -5px;
    border-width: 5px;
    border-style: solid;
    border-color: white transparent transparent transparent;
}

.grid-item:hover .tooltip {
    visibility: visible;
    opacity: 1;
}

.grid-item.colored {
    background-color: #C1FFC1;
}

.grid-item.current {
    background-color: orange;
}