/*
 * Shared styling for the interactive feature pages
 * (content/features/<name>/), linked by layouts/features/single.html
 * before each feature's own stylesheet so a feature can override any of
 * this by re-declaring it.
 *
 * Building blocks:
 *   .feature-widget        two-column flex layout, stacks below 560px
 *   .feature-panel         the inset-background rounded box every SVG,
 *                          status readout and log sits in
 *   .feature-log           scrolling monospace narration panel;
 *                          add .feature-log--animated to fade every line
 *                          in (append-only logs), or give individual
 *                          lines .new (logs rebuilt from scratch)
 *   .feature-caption       small muted paragraph under a widget
 *   .feature-chart-* etc.  the scrubbable chart family used by Test
 *                          cricket and Tour de France
 */

.feature-widget {
  display: flex;
  gap: 1rem;
  align-items: stretch;
  margin: 1.5em 0 0.5em;
}

.feature-panel {
  background: var(--color-bg-inset);
  border: 1px solid var(--color-border);
  border-radius: 6px;
}

.feature-widget svg text,
.feature-panel svg text {
  font-family: var(--font-mono);
  fill: var(--color-fg-muted);
}

.feature-log {
  min-width: 0;
  padding: 0.75em;
  font-family: var(--font-mono);
  font-size: 0.8em;
  line-height: 1.6;
  overflow-y: auto;
}

.feature-log p {
  margin: 0 0 0.3em;
  color: var(--color-fg-muted);
}

.feature-log--animated p,
.feature-log p.new {
  opacity: 0;
  animation: feature-log-in 0.4s ease forwards;
}

@keyframes feature-log-in {
  from {
    opacity: 0;
    transform: translateY(-2px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.feature-caption {
  font-size: 0.85em;
  color: var(--color-fg-muted);
}

/* Scrubbable chart family (Test cricket, Tour de France) */

.feature-chart-col {
  flex: 1 1 58%;
  min-width: 0;
  display: flex;
  flex-direction: column;
}

.feature-chart {
  width: 100%;
  height: auto;
  flex: 1 1 auto;
}

.feature-baseline {
  stroke: var(--color-border);
  stroke-width: 1;
  stroke-dasharray: 3, 3;
}

.feature-baseline-label {
  font-size: 8px;
}

.feature-marker line {
  stroke: var(--color-border);
  stroke-width: 1;
}

.feature-marker text {
  font-size: 9px;
  text-anchor: middle;
}

.feature-area {
  fill: var(--color-accent-faint);
  stroke: none;
}

.feature-line {
  fill: none;
  stroke: var(--color-accent);
  stroke-width: 1.5;
}

.feature-playhead {
  stroke: var(--color-link);
  stroke-width: 1.5;
}

.feature-strip {
  display: flex;
  gap: 2px;
  margin-top: 0.5em;
}

.feature-strip-cell {
  flex: 1 1 0;
  height: 10px;
  border-radius: 2px;
  background: var(--color-border);
  opacity: 0.4;
  transition: opacity 0.3s ease, outline-color 0.3s ease;
}

.feature-strip-cell.done {
  opacity: 0.55;
}

.feature-strip-cell.active {
  opacity: 1;
  outline: 2px solid var(--color-fg);
  outline-offset: 1px;
}

.feature-strip-caption {
  margin: 0.4em 0 0;
  font-size: 0.75em;
  color: var(--color-fg-muted);
}

.feature-info-col {
  flex: 1 1 42%;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.feature-status {
  padding: 0.6em 0.75em;
  font-size: 0.85em;
}

.feature-status p {
  margin: 0 0 0.25em;
  color: var(--color-fg-muted);
}

.feature-status p:last-child {
  margin-bottom: 0;
}

.feature-status strong {
  color: var(--color-fg);
}

.feature-log--current p:last-child {
  color: var(--color-fg);
}

/* Play/Pause: created by Feature.playPause, outside the aria-hidden
   widget (in its own row, or at the start of the scrubber row). */
.feature-controls {
  display: flex;
  align-items: center;
  gap: 0.75em;
  margin: 0 0 1em;
}

.feature-playpause {
  flex: 0 0 auto;
  min-width: 4.5em;
  font: inherit;
  font-size: 0.8em;
  color: var(--color-fg-muted);
  background: var(--color-bg-inset);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  padding: 0.25em 0.7em;
  cursor: pointer;
}

.feature-playpause:hover {
  color: var(--color-fg);
}

.feature-scrubber-row {
  display: flex;
  align-items: center;
  gap: 0.75em;
  margin: 0.75em 0;
}

.feature-scrubber {
  flex: 1 1 auto;
  accent-color: var(--color-link);
}

.feature-scrubber-label {
  flex: 0 0 auto;
  min-width: 9em;
  font-size: 0.8em;
  color: var(--color-fg-muted);
  font-family: var(--font-mono);
}

@media (max-width: 560px) {
  .feature-widget {
    flex-direction: column;
  }

  .feature-log {
    height: 160px;
  }
}