/* ========================
   GitHub Commit Heatmap
   ======================== */
.github-heatmap-section {
  padding: 4rem 2rem;
  border-top: 1px solid var(--border);
}

.github-heatmap-container {
  max-width: 1200px;
  margin: 0 auto;
}

.heatmap-wrapper {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  overflow-x: auto;
  transition: border-color var(--transition);
}

.heatmap-wrapper:hover {
  border-color: var(--border-accent);
}

.heatmap-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
  gap: 1rem;
}

.heatmap-title {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.95rem;
  font-weight: 700;
}

.heatmap-title svg {
  width: 20px;
  height: 20px;
  fill: var(--text-secondary);
}

.heatmap-stats {
  display: flex;
  gap: 1.5rem;
}

.heatmap-stat {
  text-align: center;
}

.heatmap-stat-num {
  font-size: 1.4rem;
  font-weight: 800;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
}

.heatmap-stat-label {
  font-size: 0.7rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
  margin-top: 0.2rem;
}

/* Heatmap Grid */
.heatmap-grid {
  display: flex;
  gap: 3px;
  overflow-x: auto;
  padding-bottom: 0.5rem;
}

.heatmap-grid::-webkit-scrollbar {
  height: 4px;
}

.heatmap-grid::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 2px;
}

.heatmap-week {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.heatmap-day {
  width: 12px;
  height: 12px;
  border-radius: 2px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.03);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
  position: relative;
}

.heatmap-day:hover {
  transform: scale(1.5);
  z-index: 2;
}

.heatmap-day[data-level="1"] {
  background: rgba(0, 212, 255, 0.15);
  border-color: rgba(0, 212, 255, 0.1);
}

.heatmap-day[data-level="2"] {
  background: rgba(0, 212, 255, 0.35);
  border-color: rgba(0, 212, 255, 0.2);
}

.heatmap-day[data-level="3"] {
  background: rgba(0, 212, 255, 0.6);
  border-color: rgba(0, 212, 255, 0.3);
}

.heatmap-day[data-level="4"] {
  background: rgba(0, 212, 255, 0.85);
  border-color: rgba(0, 212, 255, 0.5);
  box-shadow: 0 0 6px rgba(0, 212, 255, 0.3);
}

/* Tooltip */
.heatmap-day[data-tooltip]:hover::after {
  content: attr(data-tooltip);
  position: absolute;
  bottom: calc(100% + 6px);
  left: 50%;
  transform: translateX(-50%);
  padding: 0.3rem 0.6rem;
  background: rgba(20, 20, 20, 0.95);
  border: 1px solid var(--border);
  border-radius: 4px;
  font-size: 0.68rem;
  font-family: var(--font-mono);
  color: var(--text-secondary);
  white-space: nowrap;
  z-index: 10;
  pointer-events: none;
}

/* Legend */
.heatmap-legend {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  margin-top: 1rem;
  justify-content: flex-end;
}

.heatmap-legend-label {
  font-size: 0.7rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

.heatmap-legend-cell {
  width: 12px;
  height: 12px;
  border-radius: 2px;
}

/* Month labels */
.heatmap-months {
  display: flex;
  gap: 0;
  margin-bottom: 0.5rem;
  padding-left: 0;
}

.heatmap-month-label {
  font-size: 0.65rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
  text-align: left;
}

/* Day labels */
.heatmap-day-labels {
  display: flex;
  flex-direction: column;
  gap: 3px;
  margin-right: 6px;
  padding-top: 0;
}

.heatmap-day-label {
  height: 12px;
  font-size: 0.6rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
  line-height: 12px;
}

.heatmap-body {
  display: flex;
  align-items: flex-start;
}

/* Fallback message */
.heatmap-fallback {
  text-align: center;
  padding: 2rem;
  color: var(--text-muted);
  font-size: 0.85rem;
}

.heatmap-fallback a {
  color: var(--accent-cyan);
  text-decoration: underline;
}

/* GitHub link */
.heatmap-github-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.8rem;
  color: var(--text-secondary);
  font-family: var(--font-mono);
  transition: color var(--transition);
}

.heatmap-github-link:hover {
  color: var(--accent-cyan);
}

/* Responsive */
@media (max-width: 768px) {
  .heatmap-wrapper {
    padding: 1.2rem;
  }

  .heatmap-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .heatmap-day {
    width: 10px;
    height: 10px;
  }

  .heatmap-stats {
    gap: 1rem;
  }
}

@media (max-width: 480px) {
  .heatmap-day {
    width: 8px;
    height: 8px;
  }

  .heatmap-grid {
    gap: 2px;
  }

  .heatmap-week {
    gap: 2px;
  }
}