/* Chrona phone period component.
   SVG owns the neon frame. HTML owns the opaque, inset text surface. */
.timeline-viewport.is-phone-vertical .mobile-period-rail {
  position: absolute;
  display: block;
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  overflow: visible;
  appearance: none;
  border: 0;
  border-radius: 0;
  clip-path: none;
  background: transparent;
  box-shadow: none;
  color: var(--event-color, var(--text));
  -webkit-text-fill-color: currentColor;
  text-shadow: none;
  cursor: pointer;
  z-index: 24;
}
.timeline-viewport.is-phone-vertical .mobile-period-rail::before,
.timeline-viewport.is-phone-vertical .mobile-period-rail::after {
  content: none;
  display: none;
}
.timeline-viewport.is-phone-vertical .mobile-period-frame {
  position: absolute;
  inset: 0;
  z-index: 4;
  display: block;
  width: 100%;
  height: 100%;
  overflow: visible;
  opacity: 1;
  visibility: visible;
  pointer-events: none;
}
.timeline-viewport.is-phone-vertical .mobile-period-frame-path {
  display: block;
  fill: none;
  stroke-width: 3;
  opacity: 1;
  visibility: visible;
  vector-effect: non-scaling-stroke;
  stroke-linecap: butt;
  stroke-linejoin: miter;
  filter: drop-shadow(0 0 4px color-mix(in srgb, var(--event-color) 72%, transparent));
}
.timeline-viewport.is-phone-vertical .mobile-period-text {
  position: absolute;
  z-index: 2;
  top: 11px;
  right: 5px;
  bottom: 13px;
  left: 5px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-sizing: border-box;
  min-width: 0;
  min-height: 0;
  margin: 0;
  padding: 2px 0;
  overflow: hidden;
  border: 0;
  border-radius: 0;
  outline: 0;
  background: var(--surface-solid) !important;
  box-shadow: none;
  color: var(--event-color, var(--text)) !important;
  -webkit-text-fill-color: var(--event-color, var(--text)) !important;
  writing-mode: vertical-rl;
  text-orientation: mixed;
  white-space: nowrap;
  text-overflow: ellipsis;
  line-height: 1.1;
  text-align: center;
  pointer-events: none;
}
.timeline-viewport.is-phone-vertical .mobile-period-rail.continues-before .mobile-period-text { top: 4px; }
.timeline-viewport.is-phone-vertical .mobile-period-rail.continues-after .mobile-period-text { bottom: 4px; }
.timeline-viewport.is-phone-vertical .mobile-period-rail.is-selected { z-index: 28; }

/* AI theme does not own the phone-period text or frame. */
:root[data-visual-theme="ai"] .timeline-viewport.is-phone-vertical .mobile-period-frame,
:root[data-visual-theme="ai"] .timeline-viewport.is-phone-vertical .mobile-period-frame-path {
  display: block;
  opacity: 1;
  visibility: visible;
}
:root[data-visual-theme="ai"] .timeline-viewport.is-phone-vertical .mobile-period-text {
  background: var(--surface-solid) !important;
  color: var(--event-color, var(--text)) !important;
  -webkit-text-fill-color: var(--event-color, var(--text)) !important;
}

html[data-preview-size="phone"] .timeline-viewport.is-phone-vertical .mobile-period-rail,
html[data-preview-size="phone"] .timeline-viewport.is-phone-vertical .mobile-period-frame,
html[data-preview-size="phone"] .timeline-viewport.is-phone-vertical .mobile-period-text {
  box-sizing: border-box;
}