/* lenses.css — L1 lens-toggle bar. Prefix: .lens- only.
   ALSO the single, canonical home of the shared state classes .is-lit / .is-dim
   (PHASE2-CONTRACT §1) — ascent-map.css and threads.css MUST NOT redefine them.
   Inherits the site design tokens (--paper, --ink, --serif, etc.) from styles.css. */

/* === shared state classes (defined ONCE here) ============================== */
/* Lenses re-light the one manifest: matching nodes/threads stay lit, the rest
   dim to ~35%. Applied to SVG <a class="am-arc-node"> and to .th- thread paths.
   Opacity works on SVG elements; never hides/removes/reorders anything. */
.is-dim {
  opacity: 0.35;
  transition: opacity 200ms ease;
}
.is-lit {
  opacity: 1;
  transition: opacity 200ms ease;
}
@media (prefers-reduced-motion: reduce) {
  .is-dim,
  .is-lit {
    transition: none;
  }
}

/* === the lens bar ========================================================== */
.lens-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 1rem;
  padding: 0.55rem 1rem;
  font-family: var(--sans, sans-serif);
  background: var(--card, #fff);
  border-bottom: 1px solid var(--line, #e7ded1);
}

.lens-bar[hidden] {
  display: none;
}

.lens-lead {
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ink-faint, #8a8278);
}

/* Mobile-compact toggle — hidden on desktop (the chip groups are always shown there). */
.lens-toggle {
  display: none;
  cursor: pointer;
  font-family: inherit;
  font-size: 0.82rem;
  font-weight: 600;
  line-height: 1.2;
  padding: 0.34rem 0.8rem;
  border: 1px solid var(--line-strong, #d9cfbf);
  border-radius: 999px;
  background: var(--paper, #faf6ef);
  color: var(--ink-soft, #5c554c);
}
.lens-toggle::before {
  content: "\2261"; /* ≡ */
  margin-right: 0.45em;
  color: var(--accent, #c2693b);
  font-weight: 700;
}
.lens-has-active .lens-toggle {
  border-color: var(--accent, #c2693b);
  color: var(--ink, #2b2722);
}
.lens-toggle:hover,
.lens-toggle:focus-visible {
  border-color: var(--accent, #c2693b);
  color: var(--ink, #2b2722);
  outline: none;
}
.lens-toggle:focus-visible {
  outline: 2px solid var(--accent, #c2693b);
  outline-offset: 2px;
}

.lens-groups {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 1.1rem;
}

.lens-group {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.35rem;
}

.lens-group-label {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-faint, #8a8278);
}

.lens-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem;
}

.lens-chip {
  cursor: pointer;
  font-family: inherit;
  font-size: 0.82rem;
  line-height: 1.2;
  padding: 0.28rem 0.7rem;
  border: 1px solid var(--line, #e7ded1);
  border-radius: 999px;
  background: var(--paper, #faf6ef);
  color: var(--ink-soft, #5c554c);
  transition: border-color 140ms ease, background 140ms ease, color 140ms ease;
}

.lens-chip:hover,
.lens-chip:focus-visible {
  border-color: var(--accent, #c2693b);
  color: var(--ink, #2b2722);
  outline: none;
}

.lens-chip:focus-visible {
  outline: 2px solid var(--accent, #c2693b);
  outline-offset: 2px;
}

.lens-chip--on,
.lens-chip[aria-pressed='true'] {
  background: var(--accent, #c2693b);
  border-color: var(--accent, #c2693b);
  color: #fff;
}

.lens-clear {
  cursor: pointer;
  font-family: inherit;
  font-size: 0.78rem;
  letter-spacing: 0.03em;
  background: none;
  border: none;
  color: var(--ink-faint, #8a8278);
  text-decoration: underline;
  padding: 0.2rem 0.3rem;
}

.lens-clear[hidden] {
  display: none;
}

.lens-clear:hover,
.lens-clear:focus-visible {
  color: var(--accent, #c2693b);
  outline: none;
}

.lens-clear:focus-visible {
  outline: 2px solid var(--accent, #c2693b);
  outline-offset: 2px;
  border-radius: 6px;
}

/* === reduced motion: drop chip tweens (stored-toggle path mirrors media) === */
@media (prefers-reduced-motion: reduce) {
  .lens-chip {
    transition: none;
  }
}
.lens-reduced .lens-chip,
.lens-reduced .is-dim,
.lens-reduced .is-lit {
  transition: none;
}

/* === mobile: collapse the bar behind the toggle so the map starts near the top ===== */
@media (max-width: 640px) {
  .lens-bar {
    gap: 0.4rem 0.6rem;
    padding: 0.45rem 0.75rem;
    align-items: center;
  }
  .lens-toggle { display: inline-flex; align-items: center; }
  /* collapsed by default: only the toggle shows */
  .lens-lead { display: none; }
  .lens-bar .lens-groups,
  .lens-bar .lens-clear { display: none; }
  /* expanded: reveal the chip groups + clear control on their own rows */
  .lens-bar.lens-open {
    flex-direction: column;
    align-items: stretch;
    gap: 0.5rem;
  }
  .lens-bar.lens-open .lens-groups { display: flex; flex-direction: column; gap: 0.6rem; }
  .lens-bar.lens-open .lens-clear:not([hidden]) { display: inline-block; align-self: flex-start; }
  .lens-chip {
    padding: 0.34rem 0.7rem; /* ≥ ~44px touch row with line-height */
  }
}