/* ==========================================================================
   Charts — Data Visualization Styles
   ========================================================================== */

/* Chart Container
   ========================================================================== */
.chart {
  position: relative;
  width: 100%;
  min-height: 280px;
  display: flex;
  flex-direction: column;
}

.chart__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  padding: 0 var(--spacing-xl);
  flex-shrink: 0;
}

.chart__title {
  font-size: var(--font-size-md);
  font-weight: var(--font-weight-semibold);
  color: var(--color-gray-900);
}

.chart__subtitle {
  font-size: var(--font-size-sm);
  color: var(--color-gray-500);
  margin-top: 2px;
}

.chart__toolbar {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.chart__toolbar-btn {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: none;
  background: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  color: var(--color-gray-400);
  transition: background var(--duration-fast) var(--easing-default);
}

.chart__toolbar-btn:hover {
  background: var(--color-gray-100);
  color: var(--color-gray-600);
}

.chart__toolbar-btn:focus-visible {
  outline: 2px solid var(--color-primary-500);
  outline-offset: 2px;
}

.chart__toolbar-btn svg {
  width: 16px;
  height: 16px;
}

/* Chart SVG area */
.chart__area {
  flex: 1;
  padding: 0 var(--spacing-xl) var(--spacing-xl);
  position: relative;
  min-height: 0;
}

.chart__svg {
  width: 100%;
  height: 100%;
  overflow: visible;
}

/* Chart grid lines */
.chart__grid-line {
  stroke: var(--color-gray-100);
  stroke-width: 1;
}

.chart__grid-line--x {
  stroke-dasharray: 4 4;
}

/* Chart axis */
.chart__axis-label {
  font-size: 11px;
  fill: var(--color-gray-400);
  font-family: var(--font-family-primary);
}

.chart__axis-line {
  stroke: var(--color-gray-200);
  stroke-width: 1;
}

/* Chart line */
.chart__line {
  fill: none;
  stroke-width: 2;
  stroke-linejoin: round;
  stroke-linecap: round;
}

.chart__line--primary {
  stroke: var(--color-primary-500);
}

.chart__line--success {
  stroke: var(--color-success-500);
}

.chart__line--warning {
  stroke: var(--color-warning-500);
}

.chart__line--danger {
  stroke: var(--color-danger-500);
}

.chart__line--info {
  stroke: var(--color-info-500);
}

.chart__line--gray {
  stroke: var(--color-gray-400);
}

/* Chart area fill */
.chart__area-fill {
  stroke: none;
}

.chart__area-fill--primary {
  fill: url(#area-gradient-primary);
}

.chart__area-fill--success {
  fill: url(#area-gradient-success);
}

.chart__area-fill--warning {
  fill: url(#area-gradient-warning);
}

.chart__area-fill--danger {
  fill: url(#area-gradient-danger);
}

.chart__area-fill--info {
  fill: url(#area-gradient-info);
}

/* Chart dots */
.chart__dot {
  fill: var(--color-bg-white);
  stroke-width: 2;
  cursor: pointer;
  transition: r var(--duration-fast) var(--easing-default);
}

.chart__dot:hover {
  stroke-width: 3;
}

.chart__dot--primary {
  stroke: var(--color-primary-500);
}

.chart__dot--success {
  stroke: var(--color-success-500);
}

.chart__dot--warning {
  stroke: var(--color-warning-500);
}

.chart__dot--danger {
  stroke: var(--color-danger-500);
}

.chart__dot--info {
  stroke: var(--color-info-500);
}

/* Chart bars */
.chart__bar {
  cursor: pointer;
  transition: opacity var(--duration-fast) var(--easing-default);
}

.chart__bar:hover {
  opacity: 0.8;
}

.chart__bar--primary {
  fill: var(--color-primary-500);
}

.chart__bar--success {
  fill: var(--color-success-500);
}

.chart__bar--warning {
  fill: var(--color-warning-500);
}

.chart__bar--danger {
  fill: var(--color-danger-500);
}

.chart__bar--info {
  fill: var(--color-info-500);
}

.chart__bar--gray {
  fill: var(--color-gray-300);
}

/* Chart pie/donut slices */
.chart__slice {
  cursor: pointer;
  transition: transform var(--duration-fast) var(--easing-default);
}

.chart__slice:hover {
  transform: scale(1.03);
}

/* Chart legend */
.chart__legend {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: var(--spacing-md);
  padding: var(--spacing-md) var(--spacing-xl);
  flex-shrink: 0;
}

.chart__legend-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  font-size: var(--font-size-sm);
  color: var(--color-gray-600);
  cursor: pointer;
  user-select: none;
  transition: color var(--duration-fast) var(--easing-default);
}

.chart__legend-item:hover {
  color: var(--color-gray-800);
}

.chart__legend-item--hidden {
  opacity: 0.4;
  text-decoration: line-through;
}

.chart__legend-dot {
  width: 10px;
  height: 10px;
  border-radius: var(--radius-full);
  flex-shrink: 0;
}

.chart__legend-dot--primary {
  background: var(--color-primary-500);
}

.chart__legend-dot--success {
  background: var(--color-success-500);
}

.chart__legend-dot--warning {
  background: var(--color-warning-500);
}

.chart__legend-dot--danger {
  background: var(--color-danger-500);
}

.chart__legend-dot--info {
  background: var(--color-info-500);
}

.chart__legend-dot--gray {
  background: var(--color-gray-400);
}

/* Chart tooltip */
.chart__tooltip {
  position: absolute;
  z-index: var(--z-tooltip);
  background: var(--color-bg-white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  padding: var(--spacing-md);
  pointer-events: none;
  opacity: 0;
  visibility: hidden;
  transition:
    opacity 120ms var(--easing-default),
    visibility 120ms var(--easing-default);
  white-space: nowrap;
}

.chart__tooltip--visible {
  opacity: 1;
  visibility: visible;
}

.chart__tooltip-title {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--color-gray-800);
  margin-bottom: var(--spacing-xs);
}

.chart__tooltip-row {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: var(--font-size-sm);
  color: var(--color-gray-600);
  padding: 2px 0;
}

.chart__tooltip-dot {
  width: 8px;
  height: 8px;
  border-radius: var(--radius-full);
  flex-shrink: 0;
}

.chart__tooltip-value {
  font-weight: var(--font-weight-semibold);
  color: var(--color-gray-800);
  margin-left: auto;
}

/* Chart empty state */
.chart__empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-3xl);
  text-align: center;
  color: var(--color-gray-400);
  min-height: 280px;
}

.chart__empty-icon {
  width: 64px;
  height: 64px;
  color: var(--color-gray-300);
  margin-bottom: var(--spacing-md);
}

.chart__empty-title {
  font-size: var(--font-size-md);
  font-weight: var(--font-weight-semibold);
  color: var(--color-gray-600);
  margin-bottom: var(--spacing-xs);
}

.chart__empty-description {
  font-size: var(--font-size-sm);
  color: var(--color-gray-400);
}

/* Chart loading */
.chart--loading .chart__area {
  opacity: 0.3;
  pointer-events: none;
}

.chart__skeleton {
  display: flex;
  align-items: flex-end;
  gap: var(--spacing-sm);
  height: 200px;
  padding: var(--spacing-xl);
}

.chart__skeleton-bar {
  flex: 1;
  background: var(--color-gray-100);
  border-radius: var(--radius-xs) var(--radius-xs) 0 0;
  animation: chart-skeleton-pulse 1.5s ease-in-out infinite;
}

@keyframes chart-skeleton-pulse {
  0%,
  100% {
    opacity: 0.5;
  }
  50% {
    opacity: 1;
  }
}

/* Gauge chart
   ========================================================================== */
.gauge {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  max-width: 240px;
  margin: 0 auto;
}

.gauge__svg {
  width: 100%;
  height: auto;
}

.gauge__bg {
  fill: none;
  stroke: var(--color-gray-100);
  stroke-width: 12;
}

.gauge__fill {
  fill: none;
  stroke: var(--color-primary-500);
  stroke-width: 12;
  stroke-linecap: round;
  transition: stroke-dashoffset 1s var(--easing-default);
}

.gauge__fill--success {
  stroke: var(--color-success-500);
}

.gauge__fill--warning {
  stroke: var(--color-warning-500);
}

.gauge__fill--danger {
  stroke: var(--color-danger-500);
}

.gauge__label {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
}

.gauge__value {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-gray-900);
  line-height: 1;
}

.gauge__unit {
  font-size: var(--font-size-sm);
  color: var(--color-gray-500);
  margin-top: var(--spacing-xs);
}

/* Chart card (wrapper)
   ========================================================================== */
.chart-card {
  background: var(--color-bg-white);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-sm);
  min-height: 360px;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.chart-card .chart {
  flex: 1;
  min-height: 0;
}