/**
 * Heatmap — Visual Performance by Time Period
 *
 * "Time is what prevents everything from happening at once."
 * — John Wheeler
 */

/* ========== Base Container ========== */

.heatmap {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  padding: var(--space-4);
  background: var(--bg-secondary);
  border: 1px solid var(--border-dim);
  border-radius: var(--radius-lg);
}

/* ========== Header ========== */

.heatmap__header {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.heatmap__title {
  margin: 0;
  font-size: var(--text-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--text-primary);
}

.heatmap__subtitle {
  font-size: var(--text-xs);
  color: var(--text-tertiary);
}

/* ========== Grid: Hours (Kill Zone) ========== */

.heatmap__grid--hours {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.heatmap__label-row {
  display: flex;
  justify-content: space-between;
  padding: 0 var(--space-1);
}

.heatmap__hour-label {
  font-size: var(--text-2xs);
  font-family: var(--font-mono);
  color: var(--text-tertiary);
  width: 24px;
  text-align: center;
}

.heatmap__data-row {
  display: flex;
  gap: 2px;
}

.heatmap__cell {
  flex: 1;
  height: 32px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: transform var(--duration-fast) var(--ease-out),
              box-shadow var(--duration-fast) var(--ease-out);
  position: relative;
}

.heatmap__tone--neutral {
  background: var(--bg-secondary);
}

.heatmap__tone--pos-0 {
  background: rgba(34, 197, 94, 0.15);
}

.heatmap__tone--pos-1 {
  background: rgba(34, 197, 94, 0.30);
}

.heatmap__tone--pos-2 {
  background: rgba(34, 197, 94, 0.45);
}

.heatmap__tone--pos-3 {
  background: rgba(34, 197, 94, 0.60);
}

.heatmap__tone--pos-4 {
  background: rgba(34, 197, 94, 0.75);
}

.heatmap__tone--neg-0 {
  background: rgba(239, 68, 68, 0.15);
}

.heatmap__tone--neg-1 {
  background: rgba(239, 68, 68, 0.30);
}

.heatmap__tone--neg-2 {
  background: rgba(239, 68, 68, 0.45);
}

.heatmap__tone--neg-3 {
  background: rgba(239, 68, 68, 0.60);
}

.heatmap__tone--neg-4 {
  background: rgba(239, 68, 68, 0.75);
}

.heatmap__cell:hover,
.heatmap__cell:focus {
  transform: scale(1.05);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
  z-index: 1;
  outline: none;
}

.heatmap__cell:focus-visible {
  outline: 2px solid var(--accent-primary);
  outline-offset: 2px;
}

.heatmap__zone-label {
  font-size: var(--text-2xs);
  font-weight: var(--font-weight-bold);
  color: white;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
}

/* ========== Grid: Days ========== */

.heatmap__grid--days {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: var(--space-2);
}

.heatmap__day-cell {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-3);
  border-radius: var(--radius);
  cursor: pointer;
  transition: transform var(--duration-fast) var(--ease-out),
              box-shadow var(--duration-fast) var(--ease-out);
}

.heatmap__day-cell:hover,
.heatmap__day-cell:focus {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  outline: none;
}

.heatmap__day-cell:focus-visible {
  outline: 2px solid var(--accent-primary);
  outline-offset: 2px;
}

.heatmap__day-cell--best {
  border: 1px solid var(--color-long);
}

.heatmap__day-cell--unknown {
  border: 1px dashed var(--border);
}

.heatmap__day-label {
  font-size: var(--text-xs);
  font-weight: var(--font-weight-medium);
  color: var(--text-secondary);
}

.heatmap__day-value {
  font-size: var(--text-base);
  font-weight: var(--font-weight-semibold);
  font-family: var(--font-mono);
  color: var(--text-primary);
}

.heatmap__day-trades {
  font-size: var(--text-2xs);
  color: var(--text-tertiary);
}

/* ========== Legend ========== */

.heatmap__legend {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  padding-top: var(--space-3);
  border-top: 1px solid var(--border-dim);
}

.heatmap__legend-item {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--text-xs);
  color: var(--text-secondary);
}

.heatmap__legend-color {
  width: 12px;
  height: 12px;
  border-radius: var(--radius-sm);
}

/* ========== Stats/Summary ========== */

.heatmap__stats {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  font-size: var(--text-xs);
  color: var(--text-secondary);
}

.heatmap__stat strong {
  color: var(--text-primary);
}

.heatmap__summary {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  padding-top: var(--space-3);
  border-top: 1px solid var(--border-dim);
}

.heatmap__summary-item {
  font-size: var(--text-xs);
  color: var(--text-secondary);
}

.heatmap__summary-item--positive strong {
  color: var(--color-long);
}

.heatmap__summary-item--negative strong {
  color: var(--color-short);
}

/* ========== Tooltip ========== */

.heatmap__tooltip {
  position: fixed;
  transform: translate(-50%, -100%);
  padding: var(--space-2) var(--space-3);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-elevated);
  font-size: var(--text-xs);
  z-index: var(--z-tooltip);
  pointer-events: none;
  opacity: 0;
  transition: opacity var(--duration-fast) var(--ease-out);
}

.heatmap__tooltip--visible {
  opacity: 1;
}

.heatmap__tooltip-header {
  font-weight: var(--font-weight-semibold);
  color: var(--text-primary);
  margin-bottom: var(--space-1);
}

.heatmap__tooltip-stat {
  color: var(--text-secondary);
}

.heatmap__tooltip-stat strong {
  color: var(--text-primary);
  font-family: var(--font-mono);
}

/* ========== Responsive ========== */

@media (max-width: 640px) {
  .heatmap__grid--days {
    grid-template-columns: repeat(4, 1fr);
  }

  .heatmap__cell {
    height: 24px;
  }

  .heatmap__day-cell {
    padding: var(--space-2);
  }

  .heatmap__day-value {
    font-size: var(--text-sm);
  }
}

/* ========== Light Mode ========== */

[data-theme="light"] .heatmap {
  background: var(--bg-surface);
}

[data-theme="light"] .heatmap__tooltip {
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

/* ========== Reduced Motion ========== */

@media (prefers-reduced-motion: reduce) {
  .heatmap__cell,
  .heatmap__day-cell,
  .heatmap__tooltip {
    transition: none;
  }

  .heatmap__cell:hover,
  .heatmap__day-cell:hover {
    transform: none;
  }
}