/* DonutChart — part-to-whole ring with a center KPI (owner decision
   2026-07-07). Same rules as PieChart: ≤6 segments in fixed --chart-1→N
   order, 2px surface gaps between fills, in-segment % labels only where they
   fit, legend carries label + exact value in text tokens. The center figure
   uses proportional figures (never tabular-nums at display size). For a
   single ratio against a limit, use a meter/ScoreGauge instead.
   Visual source: tokens.css. */

.donut {
  box-sizing: border-box;
  display: flex;
  flex-direction: column;
  gap: 16px;
  width: 100%;
  max-width: 460px;
  padding: 21px;
  background: var(--canvas);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-1);
  font-family: var(--font-sans);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
}

.donut__head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
}
.donut__title {
  margin: 0;
  font-size: var(--fs-6);
  font-weight: var(--fw-heavy);
  letter-spacing: -0.01em;
}
.donut__sub {
  margin: 2px 0 0;
  font-size: var(--fs-2);
  color: var(--text-4);
}

/* Body: plot + legend side by side. */
.donut__body {
  display: flex;
  align-items: center;
  gap: 24px;
}
.donut__plot {
  position: relative;
  flex: none;
  width: 196px;
}
.donut__plot svg {
  display: block;
  width: 100%;
  height: auto;
}

/* Segments — solid categorical fills separated by a 2px surface gap. */
.donut__seg {
  stroke: var(--canvas);
  stroke-width: 2;
  stroke-linejoin: round;
  transition: filter var(--dur-2) var(--ease-out);
  outline: none;
}
.donut__seg--1 {
  fill: var(--chart-1);
}
.donut__seg--2 {
  fill: var(--chart-2);
}
.donut__seg--3 {
  fill: var(--chart-3);
}
.donut__seg--4 {
  fill: var(--chart-4);
}
.donut__seg--5 {
  fill: var(--chart-5);
}
.donut__seg--6 {
  fill: var(--chart-6);
}
.donut__seg--muted {
  fill: var(--chart-muted);
}
.donut__seg:hover {
  filter: brightness(0.95) saturate(1.15);
  cursor: pointer;
}
.donut__seg:focus-visible {
  filter: brightness(0.95) saturate(1.15);
  stroke: var(--pulse-cyan-line);
  stroke-width: 3;
}

/* Center KPI — HTML overlay; proportional figures at display size. */
.donut__center {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  pointer-events: none;
  text-align: center;
}
.donut__center-value {
  font-size: var(--fs-8);
  font-weight: var(--fw-heavy);
  line-height: 1;
  letter-spacing: -0.02em;
}
.donut__center-label {
  font-size: var(--fs-2);
  color: var(--text-4);
}

/* Legend — identity + value in text tokens; swatch mirrors the mark. */
.donut__legend {
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-width: 0;
  flex: 1;
}
.donut__legend-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: var(--fs-3);
}
.donut__swatch {
  width: 10px;
  height: 10px;
  border-radius: var(--r-full);
  flex: none;
}
.donut__swatch--1 {
  background: var(--chart-1);
}
.donut__swatch--2 {
  background: var(--chart-2);
}
.donut__swatch--3 {
  background: var(--chart-3);
}
.donut__swatch--4 {
  background: var(--chart-4);
}
.donut__swatch--muted {
  background: var(--chart-muted);
}
.donut__legend-name {
  color: var(--text-2);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.donut__legend-value {
  margin-left: auto;
  font-weight: var(--fw-heavy);
  font-variant-numeric: tabular-nums;
  color: var(--text);
}
.donut__legend-meta {
  margin-left: 6px;
  font-size: var(--fs-2);
  color: var(--text-4);
  font-variant-numeric: tabular-nums;
}

/* Shared hover readout (value leads, label follows). */
.chart-tip {
  position: absolute;
  pointer-events: none;
  transform: translate(-50%, calc(-100% - 10px));
  display: none;
  flex-direction: column;
  gap: 1px;
  padding: 7px 10px;
  border-radius: var(--r-md);
  background: var(--ink-900);
  color: #fff;
  font-size: var(--fs-2);
  line-height: 1.35;
  white-space: nowrap;
  box-shadow: var(--shadow-2);
  z-index: 2;
}
.chart-tip.is-visible {
  display: flex;
}
.chart-tip__value {
  font-weight: var(--fw-heavy);
  font-size: var(--fs-3);
  font-variant-numeric: tabular-nums;
}
.chart-tip__label {
  color: rgba(255, 255, 255, 0.72);
}