.gh-calendar {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background-color: #111;
    border-radius: 12px;
    border: 1px solid #1f2937;
    padding: 24px;
    color: #e5e7eb;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
    overflow: hidden;
}

.gh-calendar .calendar-graph {
    position: relative;
    width: 100%;
}

.gh-calendar svg {
    width: 100%;
    height: auto;
}

.gh-calendar text {
    fill: #9ca3af;
    font-size: 11px;
}

.gh-calendar .ContributionCalendar-day[data-level="0"] { fill: #161b22; }
.gh-calendar .ContributionCalendar-day[data-level="1"] { fill: #0e4429; }
.gh-calendar .ContributionCalendar-day[data-level="2"] { fill: #006d32; }
.gh-calendar .ContributionCalendar-day[data-level="3"] { fill: #26a641; }
.gh-calendar .ContributionCalendar-day[data-level="4"] { fill: #39d353; }

.gh-calendar .calendar-loading {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 160px;
    font-weight: 500;
    color: #9ca3af;
}

.gh-calendar .calendar-meta {
    margin-top: 24px;
    display: grid;
    gap: 12px;
    font-size: 0.95rem;
}

.gh-calendar .calendar-meta strong {
    color: #fff;
}

.gh-calendar .calendar-legend {
    display: flex;
    align-items: center;
    gap: 8px;
}

.gh-calendar .calendar-legend span {
    display: inline-block;
    width: 12px;
    height: 12px;
    border-radius: 2px;
    background-color: #161b22;
}

.gh-calendar .calendar-legend span[data-level="1"] { background-color: #0e4429; }
.gh-calendar .calendar-legend span[data-level="2"] { background-color: #006d32; }
.gh-calendar .calendar-legend span[data-level="3"] { background-color: #26a641; }
.gh-calendar .calendar-legend span[data-level="4"] { background-color: #39d353; }

.ghcal-tooltip {
    position: fixed;
    z-index: 9999;
    pointer-events: none;
    background: rgba(17, 24, 39, 0.95);
    color: #f9fafb;
    padding: 6px 10px;
    border-radius: 6px;
    border: 1px solid #1f2937;
    font-size: 0.85rem;
    transform: translate(-50%, -120%);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.5);
    opacity: 0;
    transition: opacity 0.1s ease;
}

.ghcal-tooltip.is-visible {
    opacity: 1;
}

@media (max-width: 640px) {
    .gh-calendar {
        padding: 18px;
    }

    .gh-calendar text {
        font-size: 9px;
    }

    .gh-calendar .calendar-meta {
        font-size: 0.9rem;
    }
}