.about-contrib {
  --contrib-weeks: 53;
  --contrib-cell-size: 11px;
  --contrib-gap: 4px;
  --contrib-label-track: 44px;
  --contrib-month-font-size: 0.78rem;
  margin-bottom: 1.2rem;
  border-radius: 22px;
  padding: 1.3rem;
  border: 1px solid rgba(148, 163, 184, 0.2);
  background: linear-gradient(180deg, #ffffff 0%, #f8fafc 100%);
  box-shadow: 0 16px 40px rgba(15, 23, 42, 0.08);
  color: #0f172a;
}

.about-contrib__header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
}

.about-contrib__eyebrow {
  margin: 0 0 0.45rem;
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: #64748b;
}

.about-contrib__header h2 {
  margin: 0;
  font-size: 1.25rem;
  font-weight: 600;
  color: #0f172a;
  letter-spacing: -0.02em;
}

.about-contrib__summary {
  max-width: 720px;
  margin: 0.65rem 0 0;
  color: #475569;
  line-height: 1.8;
}

.about-contrib__summary strong {
  color: #166534;
}

.about-contrib__link {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.66rem 0.95rem;
  border-radius: 999px;
  border: 1px solid rgba(34, 197, 94, 0.22);
  background: rgba(240, 253, 244, 0.9);
  color: #166534;
  text-decoration: none;
  font-weight: 600;
  transition: background 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}

.about-contrib__link:hover {
  background: #ecfdf5;
  border-color: rgba(34, 197, 94, 0.36);
  transform: translateY(-1px);
}

.about-contrib__viz {
  margin-top: 1rem;
  padding: 1rem 1rem 0.95rem;
  border-radius: 18px;
  border: 1px solid rgba(226, 232, 240, 0.95);
  background: rgba(255, 255, 255, 0.76);
}

.about-contrib__board-shell {
  display: grid;
  grid-template-columns: var(--contrib-label-track) minmax(0, 1fr);
  gap: 0.75rem;
  align-items: start;
}

.about-contrib__day-rail {
  display: grid;
  grid-template-rows: 18px repeat(7, var(--contrib-cell-size));
  gap: var(--contrib-gap);
  align-items: center;
  color: #94a3b8;
  font-size: 0.72rem;
  line-height: 1;
  padding-top: 2px;
}

.about-contrib__day-rail span:nth-child(2) {
  grid-row: 3;
}

.about-contrib__day-rail span:nth-child(3) {
  grid-row: 5;
}

.about-contrib__day-rail span:nth-child(4) {
  grid-row: 7;
}

.about-contrib__board-scroll {
  overflow-x: auto;
  overflow-y: hidden;
  padding-bottom: 0.25rem;
}

.about-contrib__board-scroll::-webkit-scrollbar {
  height: 6px;
}

.about-contrib__board-scroll::-webkit-scrollbar-thumb {
  border-radius: 999px;
  background: rgba(148, 163, 184, 0.5);
}

.about-contrib__board-width {
  display: grid;
  grid-template-columns: minmax(0, max-content);
  row-gap: 6px;
  width: max-content;
}

.about-contrib__months {
  display: grid;
  grid-template-columns: repeat(var(--contrib-weeks), var(--contrib-cell-size));
  gap: var(--contrib-gap);
  width: max-content;
  min-height: 18px;
  padding: 0 4px 0 0;
  margin-bottom: 0;
  align-items: end;
}

.about-contrib__month {
  display: inline-block;
  min-width: max-content;
  white-space: nowrap;
  justify-self: start;
  align-self: end;
  font-size: var(--contrib-month-font-size);
  line-height: 1;
  color: #64748b;
}

.about-contrib__month.is-hidden {
  display: none;
}

.about-contrib__heatmap {
  display: grid;
  grid-template-columns: repeat(var(--contrib-weeks), var(--contrib-cell-size));
  grid-template-rows: repeat(7, var(--contrib-cell-size));
  gap: var(--contrib-gap);
  width: max-content;
  padding: 0 4px 0 0;
}

.about-contrib__cell {
  position: relative;
  width: var(--contrib-cell-size);
  height: var(--contrib-cell-size);
  padding: 0;
  border: 0;
  background: transparent;
  cursor: pointer;
  transition: transform 0.16s ease, filter 0.16s ease;
}

.about-contrib__cell:hover,
.about-contrib__cell:focus-visible {
  transform: scale(1.12);
  filter: saturate(1.08);
  outline: none;
}

.about-contrib__cell-core,
.about-contrib__cell::before,
.about-contrib__cell::after {
  position: absolute;
  content: "";
}

.about-contrib__cell-core {
  inset: 0;
  border-radius: 2px;
  border: 1px solid rgba(255, 255, 255, 0.7);
  background: var(--cell-top);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.18);
}

.about-contrib__cell::before,
.about-contrib__cell::after {
  display: none;
}

.about-contrib__legend-row {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: 1rem;
  margin-top: 0.85rem;
  padding-top: 0.8rem;
  border-top: 1px solid rgba(226, 232, 240, 0.9);
}

.about-contrib__legend {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.about-contrib__legend-text {
  font-size: 0.8rem;
  color: #64748b;
}

.about-contrib__legend-cell {
  width: var(--contrib-cell-size);
  height: var(--contrib-cell-size);
  border-radius: 2px;
  border: 1px solid rgba(255, 255, 255, 0.72);
}

.about-contrib__legend-cell.level-0 {
  background: #ebedf0;
}

.about-contrib__legend-cell.level-1 {
  background: #9be9a8;
}

.about-contrib__legend-cell.level-2 {
  background: #40c463;
}

.about-contrib__legend-cell.level-3 {
  background: #30a14e;
}

.about-contrib__legend-cell.level-4 {
  background: #216e39;
}

[data-theme="dark"] .about-contrib {
  border-color: rgba(71, 85, 105, 0.4);
  background: linear-gradient(180deg, #0f172a 0%, #111827 100%);
  box-shadow: 0 16px 40px rgba(2, 6, 23, 0.28);
  color: #e2e8f0;
}

[data-theme="dark"] .about-contrib__eyebrow,
[data-theme="dark"] .about-contrib__month,
[data-theme="dark"] .about-contrib__day-rail,
[data-theme="dark"] .about-contrib__legend-text {
  color: #94a3b8;
}

[data-theme="dark"] .about-contrib__header h2 {
  color: #f8fafc;
}

[data-theme="dark"] .about-contrib__summary {
  color: #cbd5e1;
}

[data-theme="dark"] .about-contrib__summary strong,
[data-theme="dark"] .about-contrib__link {
  color: #bbf7d0;
}

[data-theme="dark"] .about-contrib__link {
  border-color: rgba(34, 197, 94, 0.22);
  background: rgba(20, 83, 45, 0.24);
}

[data-theme="dark"] .about-contrib__link:hover {
  background: rgba(20, 83, 45, 0.38);
}

[data-theme="dark"] .about-contrib__viz {
  border-color: rgba(71, 85, 105, 0.45);
  background: rgba(15, 23, 42, 0.72);
}

[data-theme="dark"] .about-contrib__legend-row {
  border-top-color: rgba(71, 85, 105, 0.45);
}

[data-theme="dark"] .about-contrib__cell-core,
[data-theme="dark"] .about-contrib__legend-cell {
  border-color: rgba(255, 255, 255, 0.06);
}

@media (max-width: 900px) {
  .about-contrib {
    padding: 1.05rem;
  }

  .about-contrib__header {
    flex-direction: column;
  }

  .about-contrib__link {
    width: fit-content;
  }

  .about-contrib__viz {
    padding: 0.85rem;
  }

  .about-contrib__legend-row {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 640px) {
  .about-contrib__board-shell {
    --contrib-label-track: 36px;
    gap: 0.55rem;
  }
}