/* Storytelling Arc — interactive roller coaster narrative diagram */

.storytelling-arc {
  background: #ebebf0;
  padding: 40px 24px 32px;
  font-family:
    -apple-system, BlinkMacSystemFont, "SF Pro Display", "Helvetica Neue",
    Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  position: relative;
  -webkit-user-select: none;
  user-select: none;
  contain: layout style paint;
}

.sa-svg {
  width: 100%;
  height: auto;
  display: block;
  overflow: visible;
}

/* ── Track (light gray full curve, always visible) ── */
.sa-track {
  fill: none;
  stroke: #c8c8c8;
  stroke-width: 2;
  stroke-linecap: round;
}

/* ── Curve (black, draws over track to current position) ── */
.sa-curve {
  fill: none;
  stroke: #1d1d1f;
  stroke-width: 2;
  stroke-linecap: round;
  will-change: stroke-dashoffset;
}

/* ── Rider (bitcoin guy on the curve) ── */
.sa-rider {
  opacity: 0;
  transition: opacity 0.3s ease;
  pointer-events: none;
  will-change: transform;
}

.storytelling-arc.is-revealed .sa-rider {
  opacity: 1;
}

.sa-rider-img {
  /* crisp scaling for the small image */
  image-rendering: auto;
}

/* ── Wind / speed lines ── */
.sa-wind line {
  transition: opacity 0.15s ease;
}

/* ── Marker groups ── */
.sa-marker {
  cursor: pointer;
}

/* Invisible tap target — generous for mobile */
.sa-marker-hit {
  fill: transparent;
  stroke: none;
  pointer-events: all;
}

/* Hover / active ring */
.sa-marker-ring {
  fill: transparent;
  stroke: transparent;
  stroke-width: 1.5;
  pointer-events: none;
  transition:
    fill 0.3s ease,
    stroke 0.3s ease;
}

.sa-marker:hover .sa-marker-ring,
.sa-marker.is-active .sa-marker-ring {
  fill: rgba(0, 0, 0, 0.07);
  stroke: rgba(0, 0, 0, 0.12);
}

/* Hover on unvisited dot — darken to match label text */
.sa-marker:hover:not(.is-visited) .sa-marker-dot {
  fill: rgba(0, 0, 0, 0.55);
}

.sa-marker:hover:not(.is-visited) .sa-marker-ring {
  fill: rgba(0, 0, 0, 0.04);
  stroke: rgba(0, 0, 0, 0.08);
}

/* Waypoint dot — default: light gray, invisible until entrance */
.sa-marker-dot {
  fill: #c8c8c8;
  pointer-events: none;
  transform-box: fill-box;
  transform-origin: center;
  opacity: 0;
  transform: scale(0);
  transition: fill 0.35s ease;
}

/* Visited: black (behind or at rider) */
.sa-marker.is-visited .sa-marker-dot {
  fill: #1d1d1f;
}

.sa-marker.is-entered .sa-marker-dot {
  opacity: 1;
  transform: scale(1);
  transition:
    opacity 0.3s ease,
    transform 0.45s cubic-bezier(0.34, 1.56, 0.64, 1),
    fill 0.35s ease;
}

/* ── Labels — default: light gray, invisible until entrance ── */
.sa-label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.02em;
  text-anchor: middle;
  pointer-events: none;
  fill: rgba(0, 0, 0, 0.2);
  opacity: 0;
  transition:
    opacity 0.4s ease,
    fill 0.35s ease;
}

.sa-marker.is-entered .sa-label {
  opacity: 1;
}

/* Visited: darker */
.sa-marker.is-visited .sa-label {
  fill: rgba(0, 0, 0, 0.55);
}

/* Active / hover: darkest */
.sa-marker.is-active .sa-label,
.sa-marker:hover .sa-label {
  fill: rgba(0, 0, 0, 0.7);
}

/* ── Reduced motion ── */
@media (prefers-reduced-motion: reduce) {
  .sa-marker-dot,
  .sa-label {
    transition: none;
  }
}

/* ── Responsive ── */
@media (max-width: 600px) {
  .storytelling-arc {
    padding: 32px 16px 24px;
  }
  .sa-label {
    font-size: 10px;
  }
}