.habits-container {
  max-width: 900px;
  margin: 0 auto;
}

.year-selector {
  margin-bottom: 2rem;
  display: flex;
  gap: 0.5rem;
}

.year-btn {
  padding: 0.5rem 1rem;
  border: none;
  background: var(--tertiary);
  color: var(--primary);
  cursor: pointer;
  border-radius: 4px;
  font-size: 0.9rem;
  transition: background 0.2s;
}

.year-btn:hover {
  background: var(--secondary);
}

.year-btn.active {
  background: var(--primary);
  color: var(--theme);
  font-weight: bold;
}

.habit-section {
  margin-bottom: 2.5rem;
}

.habit-section h2 {
  margin-bottom: 0.25rem;
  font-size: 1.1rem;
}

.habit-subtitle {
  color: var(--secondary);
  font-size: 0.85rem;
  margin-bottom: 0.75rem;
}

.contribution-graph {
  overflow-x: auto;
}

.graph-wrapper {
  display: inline-block;
  min-width: 750px;
}

.month-labels {
  position: relative;
  height: 1rem;
  font-size: 0.7rem;
  color: var(--secondary);
  margin-bottom: 0.25rem;
  padding-left: 20px;
}

.month-label {
  position: absolute;
  white-space: nowrap;
}

.graph-body {
  display: flex;
}

.day-labels {
  display: flex;
  flex-direction: column;
  justify-content: space-around;
  font-size: 0.65rem;
  color: var(--secondary);
  padding-right: 4px;
  width: 16px;
}

.day-label {
  height: 11px;
  line-height: 11px;
}

.weeks-container {
  display: flex;
  gap: 2px;
}

.week-column {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.day-cell {
  width: 11px;
  height: 11px;
  border-radius: 2px;
  background: var(--border);
  cursor: pointer;
  transition: transform 0.1s;
}

.day-cell:hover {
  transform: scale(1.2);
}

.day-cell.level-0 {
  background: var(--border);
}

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

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

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

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

.day-cell.future {
  background: var(--border);
  opacity: 0.3;
}

.day-cell.today {
  outline: 2px solid var(--primary);
  outline-offset: -1px;
}

.tooltip {
  position: fixed;
  background: var(--primary);
  color: var(--theme);
  padding: 0.4rem 0.6rem;
  border-radius: 4px;
  font-size: 0.75rem;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.15s;
  z-index: 1000;
  white-space: nowrap;
}

.tooltip.visible {
  opacity: 1;
}

@media (max-width: 768px) {
  .graph-wrapper {
    min-width: 600px;
  }

  .day-cell {
    width: 9px;
    height: 9px;
  }

  .day-labels {
    width: 14px;
  }

  .day-label {
    height: 9px;
    line-height: 9px;
  }
}