.datetime-picker {
    background: var(--tg-theme-bg-color, #fff);
    border-radius: var(--tg-border-radius, 8px);
    padding: 8px;
    margin-top: 8px;
}

.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
}

.nav-button {
    background: none;
    border: none;
    padding: 4px 12px;
    cursor: pointer;
    color: var(--tg-theme-button-color, #2481cc);
    font-size: 14px;
    border-radius: 16px;
    background: var(--tg-theme-secondary-bg-color, #f0f0f0);
}

.nav-button:disabled {
    color: var(--tg-theme-hint-color, #999);
    cursor: not-allowed;
    opacity: 0.5;
}

.month-year {
    text-align: center;
    font-size: 14px;
    line-height: 1.2;
    font-weight: 500;
}

.calendar-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 4px;
    margin-bottom: 12px;
}

.day-name {
    text-align: center;
    font-size: 12px;
    color: var(--tg-theme-hint-color, #999);
    padding: 4px 0;
    font-weight: 500;
}

.day-cell {
    text-align: center;
    padding: 8px 0;
    font-size: 14px;
    cursor: pointer;
    border-radius: 8px;
    background: var(--tg-theme-secondary-bg-color, #f0f0f0);
    transition: all 0.2s ease;
    user-select: none;
}

.day-cell:not(.disabled):hover {
    background-color: var(--tg-theme-button-color, #2481cc);
    color: var(--tg-theme-button-text-color, #fff);
    opacity: 0.8;
}

.day-cell.selected {
    background-color: var(--tg-theme-button-color, #2481cc);
    color: var(--tg-theme-button-text-color, #fff);
    font-weight: 500;
}

.day-cell.disabled {
    background: var(--tg-theme-secondary-bg-color, #f0f0f0);
    opacity: 0.3;
    color: var(--tg-theme-text-color, #000);
    cursor: not-allowed;
}

.date-selection {
    margin-bottom: 8px;
}

.date-presets {
    display: flex;
    flex-flow: row wrap;
    gap: 6px;
    margin-bottom: 8px;
    width: 100%;
}

.date-presets.hidden {
    display: none;
}

.date-preset-btn {
    flex: 1 1 0;
    min-width: calc(50% - 3px); /* 50% minus half of gap */
    max-width: 100%;
    background: var(--tg-theme-secondary-bg-color, #f0f0f0);
    border: none;
    padding: 8px 12px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 14px;
    color: var(--tg-theme-text-color, #000);
    white-space: nowrap;
    transition: all 0.2s ease;
    text-align: center;
}

@media (min-width: 400px) {
    .date-preset-btn {
        min-width: calc(25% - 4.5px); /* 25% minus 3/4 of gap */
    }
}

.date-preset-btn:hover {
    background-color: var(--tg-theme-button-color, #2481cc);
    color: var(--tg-theme-button-text-color, #fff);
    opacity: 0.8;
}

.date-preset-btn.active {
    background-color: var(--tg-theme-button-color, #2481cc);
    color: var(--tg-theme-button-text-color, #fff);
}

.calendar-container {
    display: none;
    margin-bottom: 8px;
}

.calendar-container.visible {
    display: block;
}

.time-picker {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    background: var(--tg-theme-secondary-bg-color, #f0f0f0);
    padding: 12px;
    border-radius: 8px;
}

.spinner {
    position: relative;
    width: 48px;
    height: 96px;
    overflow: hidden;
    text-align: center;
    background: none;
}

.spinner::before,
.spinner::after {
    content: '';
    position: absolute;
    left: 0;
    right: 0;
    height: 32px;
    z-index: 1;
    pointer-events: none;
}

.spinner::before {
    top: 0;
    background: linear-gradient(to bottom, 
        var(--tg-theme-secondary-bg-color, #f0f0f0) 0%,
        rgba(240,240,240,0) 100%);
}

.spinner::after {
    bottom: 0;
    background: linear-gradient(to top, 
        var(--tg-theme-secondary-bg-color, #f0f0f0) 0%,
        rgba(240,240,240,0) 100%);
}

.spinner-values {
    transition: transform 0.2s;
    cursor: grab;
}

.spinner.dragging .spinner-values {
    cursor: grabbing;
}

.spinner-value {
    height: 32px;
    line-height: 32px;
    font-size: 16px;
    user-select: none;
}

.spinner-value.disabled {
    color: var(--tg-theme-hint-color, #999);
}

.spinner-value.selected {
    color: var(--tg-theme-button-color, #2481cc);
    font-weight: 500;
}