/**
 * fs-section-swimlanes — stacked section title dock under site header.
 * Pair with js/ks-section-swimlanes.js; --fs-site-header-h set by init().
 */

:root {
  --fs-swimlane-h: 2rem;
  --fs-swimlane-transition: 320ms cubic-bezier(0.4, 0, 0.2, 1);
}

.fs-section-swimlanes {
  position: fixed;
  top: var(--fs-site-header-h, 3.5rem);
  left: 0;
  right: 0;
  z-index: 1020;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.96);
  border-bottom: 1px solid var(--fs-border, rgba(15, 23, 42, 0.1));
  box-shadow: 0 2px 12px rgba(15, 23, 42, 0.04);
  backdrop-filter: blur(8px);
}

.fs-section-swimlanes[hidden] {
  display: none;
}

.fs-section-swimlane {
  display: flex;
  align-items: center;
  width: 100%;
  min-height: var(--fs-swimlane-h);
  max-height: var(--fs-swimlane-h);
  margin: 0;
  padding: 0 clamp(1rem, 3vw, 2rem);
  border: 0;
  border-bottom: 1px solid var(--fs-border, rgba(15, 23, 42, 0.08));
  background: transparent;
  color: var(--fs-text-muted, #64748b);
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  text-align: left;
  cursor: pointer;
  overflow: hidden;
  opacity: 1;
  transform: translateY(0);
  transition: color 0.15s ease, background 0.15s ease;
}

.fs-section-swimlane--entering {
  animation: fs-swimlane-enter var(--fs-swimlane-transition) both;
}

@keyframes fs-swimlane-enter {
  from {
    opacity: 0;
    transform: translateY(-100%);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fs-section-swimlane:last-child {
  border-bottom: 0;
}

.fs-section-swimlane--active {
  color: var(--fs-text, #0f172a);
  font-weight: 700;
}

.fs-section-swimlane__label {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.fs-section-swimlane:hover,
.fs-section-swimlane:focus-visible {
  color: var(--fs-text, #0f172a);
  background: rgba(15, 23, 42, 0.03);
  outline: none;
}

.fs-section-swimlane:focus-visible {
  box-shadow: inset 0 0 0 2px var(--fs-focus, #0a5555);
}

/* In-flow lane titles — garage door collapse */
body.cap-landing-swimlanes .fs-section-lane-title,
body.cap-landing-swimlanes [data-fs-section-lane] .cap-section__title,
body.cap-landing-swimlanes [data-fs-section-lane] .cap-hero__title {
  overflow: hidden;
  transform: translateY(0) scale(1);
  opacity: 1;
  transform-origin: top left;
  transition:
    transform var(--fs-swimlane-transition),
    opacity var(--fs-swimlane-transition),
    max-height var(--fs-swimlane-transition),
    margin var(--fs-swimlane-transition);
}

body.cap-landing-swimlanes h2.fs-section-lane-title,
body.cap-landing-swimlanes [data-fs-section-lane] h2.cap-section__title {
  max-height: 5.5rem;
}

body.cap-landing-swimlanes h1.fs-section-lane-title,
body.cap-landing-swimlanes [data-fs-section-lane] h1.cap-hero__title {
  max-height: 7rem;
}

.fs-section-title--garage-out {
  opacity: 0 !important;
  max-height: 0 !important;
  margin-top: 0 !important;
  margin-bottom: 0 !important;
  padding-top: 0 !important;
  padding-bottom: 0 !important;
  transform: translateY(-1.5rem) scale(0.9);
  pointer-events: none;
}

.fs-section-title--garage-in {
  opacity: 0;
  max-height: 0 !important;
  margin-top: 0 !important;
  margin-bottom: 0 !important;
  transform: translateY(-1rem) scale(0.94);
}

/* FLIP morph layer — title shrinks into dock slot */
.fs-section-title-morph {
  position: fixed;
  z-index: 1035;
  margin: 0;
  padding: 0;
  pointer-events: none;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  transform-origin: top left;
  will-change: transform, opacity, font-size;
}

.fs-section-swimlane--morph-pending {
  opacity: 0 !important;
  pointer-events: none;
}

@media (prefers-reduced-motion: reduce) {
  .fs-section-swimlane,
  .fs-section-title--garage-out,
  .fs-section-title--garage-in,
  body.cap-landing-swimlanes .fs-section-lane-title {
    transition: none !important;
    transform: none !important;
  }
  .fs-section-swimlane--entering {
    animation: none !important;
  }
  .fs-section-title-morph {
    display: none !important;
  }
}

@media (max-width: 390px) {
  .fs-section-swimlanes[data-fs-swimlanes-collapsed="true"] {
    display: none;
  }
}