/* ---------- "Biểu đồ" button on the data bar ---------- */
.chart-btn::before {
  content: '';
  width: 0.95rem;
  height: 0.8rem;
  border-bottom: 2px solid var(--ink);
  background:
    linear-gradient(var(--green), var(--green)) 0 100% / 0.22rem 45% no-repeat,
    linear-gradient(var(--green), var(--green)) 50% 100% / 0.22rem 100% no-repeat,
    linear-gradient(var(--green), var(--green)) 100% 100% / 0.22rem 70% no-repeat;
}

/* ---------- "Chèn biểu đồ" dialog ---------- */
.chart-dialog {
  width: min(27rem, calc(100% - 2rem));
}
.chart-cards {
  display: grid;
  gap: var(--space-1);
  min-width: 0;
  margin: 0 0 var(--space-2);
  padding: 0;
  border: 0;
}
.chart-cards legend {
  margin-bottom: var(--space-1);
  padding: 0;
  font-weight: 600;
}
.chart-card {
  display: grid;
  grid-template-columns: auto auto minmax(0, 1fr);
  align-items: center;
  gap: 0.7rem;
  padding: 0.6rem 0.75rem;
  border: 1.5px solid var(--grid);
  border-radius: 4px;
  background: var(--surface);
  cursor: pointer;
  transition: border-color var(--duration-fast), background var(--duration-fast), box-shadow var(--duration-fast), transform var(--duration-fast);
}
.chart-card:hover {
  border-color: var(--ink);
  background: var(--paper);
}
.chart-card:has(:checked) {
  border-color: var(--ink);
  background: var(--green-wash);
  box-shadow: 4px 4px 0 var(--ink);
  transform: translate(-2px, -2px);
}
.chart-card:active {
  box-shadow: none;
  transform: none;
}
@supports selector(:has(*)) {
  .chart-card:has(:focus-visible) {
    outline: 3px solid var(--focus);
    outline-offset: 2px;
  }
  .chart-card input:focus-visible {
    outline: none;
  }
}
.chart-card-icon {
  width: 2.4rem;
  height: 1.8rem;
  fill: var(--green);
}
.chart-card-icon .icon-stroke {
  fill: none;
  stroke: var(--green);
  stroke-width: 3;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.chart-card-icon .icon-soft {
  fill: var(--head-hl);
}
.chart-card-text {
  display: grid;
  gap: 0.1rem;
  min-width: 0;
}
.chart-card-name {
  font-family: var(--font-display);
  font-size: 1.02rem;
  font-weight: 800;
  line-height: 1.2;
}
.chart-card-use {
  color: var(--ink-soft);
  font-size: 0.85rem;
  line-height: 1.35;
}
.chart-replace,
.chart-note {
  padding: 0.45rem 0.7rem;
  border-left: 4px solid var(--signal);
  background: var(--signal-wash);
  font-size: 0.88rem;
}
.chart-dialog-error {
  min-height: 1.4em;
  color: var(--error);
  font-size: 0.9rem;
  font-weight: 600;
}

/* ---------- chart panel under the sheet ---------- */
.chart-host {
  margin-top: var(--space-4);
  container: chart-host / inline-size;
}
.chart-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  grid-template-areas:
    'caption controls'
    'note note'
    'plot plot'
    'legend legend';
  gap: var(--space-2) var(--space-3);
  margin: 0;
  padding: var(--space-3);
  border: 2px solid var(--ink);
  background: var(--surface);
  box-shadow: 10px 10px 0 var(--head-hl);
}
.chart-panel[hidden] {
  display: none;
}
.chart-caption {
  grid-area: caption;
  min-width: 0;
}
.chart-title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.15rem, 1rem + 0.6vw, 1.45rem);
  font-weight: 800;
  line-height: 1.15;
  overflow-wrap: anywhere;
}
.chart-source {
  margin: 0.25rem 0 0;
  color: var(--ink-soft);
  font-family: var(--font-mono);
  font-size: 0.82rem;
}
.chart-controls {
  grid-area: controls;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  align-self: start;
  gap: var(--space-2);
}
.chart-types {
  display: inline-flex;
}
.chart-type-btn {
  min-height: 2.5rem;
  margin-left: -1.5px;
  padding: 0.3rem 0.85rem;
  border: 1.5px solid var(--ink);
  background: var(--surface);
  color: var(--ink);
  font: inherit;
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  transition: background var(--duration-fast), color var(--duration-fast);
}
.chart-type-btn:first-child {
  margin-left: 0;
  border-radius: 4px 0 0 4px;
}
.chart-type-btn:last-child {
  border-radius: 0 4px 4px 0;
}
.chart-type-btn:hover {
  background: var(--green-wash);
}
.chart-type-btn[aria-pressed='true'] {
  background: var(--ink);
  color: var(--signal);
}
.chart-type-btn:focus-visible {
  position: relative;
  z-index: 1;
}
.chart-note {
  grid-area: note;
  margin: 0;
}
.chart-plot {
  grid-area: plot;
  min-width: 0;
}
.chart-legend-slot {
  grid-area: legend;
  min-width: 0;
}
.chart-error {
  margin: 0;
  padding: var(--space-3);
  border: 2px dashed var(--error);
  background: var(--error-wash);
  color: var(--error);
  font-weight: 600;
}

/* ---------- the drawing ---------- */
.chart-svg {
  display: block;
  max-width: 100%;
  height: auto;
  overflow: visible;
  font-family: var(--font-body);
}
.series-1 { --series: var(--series-1); }
.series-2 { --series: var(--series-2); }
.series-3 { --series: var(--series-3); }
.series-4 { --series: var(--series-4); }
.series-5 { --series: var(--series-5); }
.series-6 { --series: var(--series-6); }

.chart-grid {
  stroke: var(--grid);
  stroke-dasharray: 3 4;
}
.chart-zero {
  stroke: var(--ink);
  stroke-width: 1.5;
}
.chart-tick {
  fill: var(--ink-soft);
  font-family: var(--font-mono);
  font-size: 11px;
}
.chart-category {
  fill: var(--ink);
  font-size: 12px;
  font-weight: 600;
}
.chart-bar {
  fill: var(--series);
  transition: opacity var(--duration-fast);
}
.chart-bars:hover .chart-bar:not(:hover) {
  opacity: 0.55;
}
.chart-line {
  fill: none;
  stroke: var(--series);
  stroke-width: 2.5;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.chart-dot {
  fill: var(--surface);
  stroke: var(--series);
  stroke-width: 2.5;
}
.chart-dot:hover {
  fill: var(--series);
}
.chart-slice {
  fill: var(--series);
  stroke: var(--surface);
  stroke-width: 2;
  stroke-linejoin: round;
  transition: opacity var(--duration-fast);
}
.chart-pie:hover .chart-slice:not(:hover) {
  opacity: 0.6;
}
.chart-slice-label {
  fill: var(--surface);
  font-size: 12px;
  font-weight: 700;
  pointer-events: none;
}

/* ---------- legend ---------- */
.chart-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 1.1rem;
  margin: 0;
  padding: var(--space-2) 0 0;
  border-top: 1px dashed var(--grid);
  list-style: none;
  font-size: 0.88rem;
}
.chart-legend li {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  min-width: 0;
  overflow-wrap: anywhere;
}
.chart-swatch {
  flex: none;
  width: 0.85rem;
  height: 0.85rem;
  border: 1.5px solid var(--ink);
  background: var(--series);
}
.chart-swatch.is-line {
  width: 1.3rem;
  height: 0.3rem;
  border: 0;
  border-radius: 2px;
}
.chart-swatch.is-slice {
  border-radius: 50%;
}

/* ---------- entry motion: only right after inserting or switching type ---------- */
@media (prefers-reduced-motion: no-preference) {
  .is-entering .chart-bar {
    transform-box: fill-box;
    transform-origin: 50% 100%;
    animation: chart-rise var(--duration-normal) var(--ease-out) backwards;
    animation-delay: calc(var(--i, 0) * 45ms);
  }
  .is-entering .chart-bar.is-neg {
    transform-origin: 50% 0;
  }
  .is-entering .chart-lines {
    animation: chart-reveal 700ms var(--ease-out) backwards;
  }
  .is-entering .chart-pie {
    transform-box: fill-box;
    transform-origin: center;
    animation: chart-pop 420ms var(--ease-out) backwards;
  }
}
@keyframes chart-rise {
  from {
    transform: scaleY(0);
  }
}
@keyframes chart-reveal {
  from {
    clip-path: inset(0 100% 0 0);
  }
}
@keyframes chart-pop {
  from {
    opacity: 0;
    transform: scale(0.6) rotate(-25deg);
  }
}

/* Stack the header when the panel itself is narrow (the sheet column at 1024px is too),
   with the viewport query as a fallback for browsers without container queries. */
@container chart-host (max-width: 40rem) {
  .chart-panel {
    grid-template-columns: minmax(0, 1fr);
    grid-template-areas:
      'caption'
      'controls'
      'note'
      'plot'
      'legend';
  }
}
@media (max-width: 40rem) {
  .chart-panel {
    grid-template-columns: minmax(0, 1fr);
    grid-template-areas:
      'caption'
      'controls'
      'note'
      'plot'
      'legend';
    padding: var(--space-2);
  }
}