/*
 * /walk — the duck tabi.
 * Sumi-e ink path + seasonal dots + paper-grain atmosphere.
 * Ported from Pilgrim/Scenes/Home/{InkScrollView,CalligraphyPathRenderer,WalkDotView}.
 */

:root {
  --walk-parchment: #f5f0e8;
  --walk-parchment-edge: #ece5d5;
  --walk-ink: #2c241e;
  --walk-stone: #8b7355;
  --walk-fog: #b8afa2;
  --walk-moss: #7a8b6f;
  --walk-rust: #a0634b;
  --walk-dawn: #c4956a;
  --walk-red-seal: #a43a2e;
  --walk-ink-soft: rgba(44, 36, 30, 0.55);
  --walk-ink-softer: rgba(44, 36, 30, 0.38);
  --walk-ink-faintest: rgba(44, 36, 30, 0.18);
}

[data-theme="dark"] {
  --walk-parchment: #1a1611;
  --walk-parchment-edge: #14110d;
  --walk-ink: #f0ebe1;
  --walk-stone: #b29575;
  --walk-fog: #5e564c;
  --walk-moss: #8fa383;
  --walk-rust: #c27856;
  --walk-dawn: #d9a374;
  --walk-red-seal: #b04235;
  --walk-ink-soft: rgba(240, 235, 225, 0.62);
  --walk-ink-softer: rgba(240, 235, 225, 0.42);
  --walk-ink-faintest: rgba(240, 235, 225, 0.18);
}

.walk-body {
  background: var(--walk-parchment);
  color: var(--walk-ink);
  font-family: var(--font-display, "Cormorant Garamond"), Georgia, serif;
  line-height: 1.55;
  margin: 0;
  padding: 0;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  position: relative;
  transition:
    background-color 1100ms cubic-bezier(0.4, 0, 0.2, 1),
    color 1100ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* Match the slow curve on everything that changes between modes */
.walk-body,
.walk-body::before,
.walk-body::after,
.walk-state-line,
.walk-stats-line,
.walk-entry,
.walk-entry-stage,
.walk-entry-stage-ja,
.walk-entry-weather,
.walk-entry-km,
.walk-entry-author,
.walk-back,
.walk-source a,
.walk-path-stroke,
.walk-path-fiber,
.walk-dot-bleed,
.walk-dot-body,
.walk-dot-pool,
.walk-bgmap-full,
.walk-bgmap-walked,
.walk-bgmap-duck {
  transition:
    background-color 1100ms cubic-bezier(0.4, 0, 0.2, 1),
    color 1100ms cubic-bezier(0.4, 0, 0.2, 1),
    fill 1100ms cubic-bezier(0.4, 0, 0.2, 1),
    fill-opacity 1100ms cubic-bezier(0.4, 0, 0.2, 1),
    stroke 1100ms cubic-bezier(0.4, 0, 0.2, 1),
    stroke-opacity 1100ms cubic-bezier(0.4, 0, 0.2, 1),
    opacity 1100ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* Paper grain — subtle SVG noise overlay */
.walk-body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='240' height='240'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 0  0 0 0 0 0  0 0 0 0 0  0 0 0 0.045 0'/></filter><rect width='100%' height='100%' filter='url(%23n)'/></svg>");
  mix-blend-mode: multiply;
  opacity: 0.55;
  z-index: 0;
}

[data-theme="dark"] .walk-body::before {
  mix-blend-mode: screen;
  opacity: 0.35;
}

/* Soft vignette at edges suggests hand-bound page */
.walk-body::after {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(ellipse at center, transparent 60%, var(--walk-parchment-edge) 100%);
  opacity: 0.5;
  z-index: 0;
}

.walk-defs {
  position: absolute;
  width: 0;
  height: 0;
  overflow: hidden;
}

/* ---- Background watermark: the real Shikoku route the duck has walked ---- */

.walk-bgmap {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: none;
  z-index: 0;
}

.walk-bgmap-svg {
  width: min(90vw, 1100px);
  height: min(90vh, 1100px);
  opacity: 0.85;
}

.walk-bgmap-full {
  fill: none;
  stroke: var(--walk-stone);
  stroke-width: 0.9;
  stroke-opacity: 0.16;
  stroke-linejoin: round;
  stroke-linecap: round;
}

.walk-bgmap-walked {
  fill: none;
  stroke: var(--walk-ink);
  stroke-width: 1.3;
  stroke-opacity: 0.30;
  stroke-linejoin: round;
  stroke-linecap: round;
}

.walk-bgmap-duck {
  fill: var(--walk-stone);
  fill-opacity: 0.55;
}

[data-theme="dark"] .walk-bgmap-full { stroke-opacity: 0.10; }
[data-theme="dark"] .walk-bgmap-walked { stroke-opacity: 0.22; }

body.constellation .walk-bgmap-full { stroke-opacity: 0.14; stroke: #e8dfc6; }
body.constellation .walk-bgmap-walked { stroke-opacity: 0.32; stroke: #e8dfc6; }
body.constellation .walk-bgmap-duck { fill: #e8dfc6; fill-opacity: 0.75; }

/* ---- Top bar (back + moon) ---- */

.walk-topbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.9rem 1.25rem;
  z-index: 10;
  pointer-events: none;
}

.walk-topbar > * { pointer-events: auto; }

.walk-back {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  text-decoration: none;
  border-bottom: none;
  font-family: var(--font-display, "Cormorant Garamond"), Georgia, serif;
  font-size: 0.85rem;
  font-variant: small-caps;
  letter-spacing: 0.14em;
  color: var(--walk-ink-soft);
  padding: 0.3rem 0.5rem;
  border-radius: 2px;
  transition: color 300ms ease, opacity 300ms ease;
  opacity: 0.75;
}

.walk-back:hover,
.walk-back:focus,
.walk-back:focus-visible {
  color: var(--walk-ink);
  opacity: 1;
  outline: none;
  border-bottom-color: transparent;
}

.walk-moon {
  background: none;
  border: none;
  padding: 0;
  cursor: pointer;
  width: 32px;
  height: 32px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  opacity: 0.75;
  transition: opacity 300ms ease, transform 400ms ease;
  position: relative;
}

.walk-moon:hover,
.walk-moon:focus-visible {
  opacity: 1;
  outline: none;
  transform: scale(1.04);
}

.walk-moon canvas {
  display: block;
}

/* ---- Main ---- */

.walk-main {
  max-width: 780px;
  margin: 0 auto;
  padding: 5rem 1.5rem 5rem;
  position: relative;
  z-index: 1;
}

/* Corner flourishes */
.walk-corner {
  position: absolute;
  width: 48px;
  height: 48px;
  color: var(--walk-stone);
  pointer-events: none;
}
.walk-corner--tl { top: 1.5rem; left: 1.25rem; }
.walk-corner--br { bottom: 1.5rem; right: 1.25rem; }

@media (max-width: 640px) {
  .walk-corner { width: 32px; height: 32px; }
  .walk-corner--tl { top: 1rem; left: 0.5rem; }
  .walk-corner--br { bottom: 1rem; right: 0.5rem; }
}

/* ---- Header ---- */

.walk-header {
  text-align: center;
  margin-bottom: 3.5rem;
}

.walk-header-duck {
  display: inline-block;
  width: 28px;
  height: 28px;
  opacity: 0.88;
  vertical-align: middle;
  margin-bottom: 0.35rem;
}

.walk-header-title {
  font-family: var(--font-display, "Cormorant Garamond"), Georgia, serif;
  font-weight: 500;
  font-size: 1.5rem;
  color: var(--walk-ink);
  margin: 0.25rem 0 0.7rem;
  font-variant: small-caps;
  letter-spacing: 0.14em;
}

.walk-state-line {
  font-style: italic;
  font-size: 0.95rem;
  color: var(--walk-ink-soft);
  margin: 0;
}

.walk-stats-line {
  font-family: var(--font-ui, "Lato"), "Helvetica Neue", sans-serif;
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--walk-ink-softer);
  margin: 0.7rem 0 0;
  font-weight: 500;
}

.walk-stats-sep {
  display: inline-block;
  margin: 0 0.5rem;
  opacity: 0.55;
}

/* ---- Journey ---- */

.walk-journey {
  position: relative;
  display: grid;
  grid-template-columns: 110px 1fr;
  gap: 0;
  padding-top: 1rem;
}

@media (max-width: 640px) {
  .walk-journey {
    grid-template-columns: 54px 1fr;
  }
  .walk-main {
    padding: 4rem 1rem 4rem;
  }
}

.walk-path {
  grid-column: 1;
  width: 100%;
  height: 100%;
  display: block;
  overflow: visible;
}

/* Brush-stroke segments — stroked bezier per pair of dots */
.walk-path-stroke {
  stroke: var(--walk-ink);
  stroke-opacity: 0.65;
}
.walk-path-stroke--older { stroke-opacity: 0.40; }
.walk-path-stroke--oldest { stroke-opacity: 0.22; }

.walk-path-fiber {
  stroke: var(--walk-ink);
  stroke-opacity: 0.18;
  stroke-linecap: round;
}

/* Dot layers */
.walk-dot-bleed {
  fill-opacity: 0.22;
  filter: url(#sumi-dot-3);
}
.walk-dot-body {
  filter: url(#sumi-dot);
  filter: drop-shadow(0 1px 1.5px rgba(44, 36, 30, 0.2));
}
.walk-dot-body--irregular {
  filter: url(#sumi-dot-2);
}
.walk-dot-pool {
  fill-opacity: 0.48;
}
.walk-dot-highlight {
  fill: rgba(255, 255, 255, 0.32);
}
.walk-dot-ring {
  fill: none;
  stroke-width: 1.1;
  stroke-opacity: 0.55;
}

[data-theme="dark"] .walk-dot-highlight {
  fill: rgba(240, 235, 225, 0.22);
}

/* Duck marker — the clickable easter egg. The duck stays put on hover;
   no transform (SVG <image> origin is top-left, so scale/translate shifts
   the image unintuitively). */
.walk-duck-link {
  cursor: pointer;
  text-decoration: none;
  outline: none;
}
.walk-duck-marker {
  pointer-events: auto;
}

/* Draw-in animation — the path & dots appear as if being written. */
.walk-path-stroke,
.walk-path-fiber {
  opacity: 0;
  animation: walk-appear 700ms ease-out forwards;
  animation-delay: calc(var(--seg-i, 0) * 180ms + 200ms);
}

.walk-dot-group {
  opacity: 0;
  animation: walk-appear 550ms ease-out forwards;
  animation-delay: calc(var(--dot-i, 0) * 180ms + 350ms);
}

.walk-duck-marker {
  opacity: 0;
  animation: walk-appear 600ms ease-out forwards;
  animation-delay: 200ms; /* duck shows first — it's already there */
}

@keyframes walk-appear {
  from { opacity: 0; }
  to   { opacity: 1; }
}

/* Entries — right column */

.walk-entries {
  grid-column: 2;
  padding-left: 1.4rem;
  padding-top: 2rem;
  display: flex;
  flex-direction: column;
  gap: 2.4rem;
}
@media (max-width: 640px) {
  .walk-entries {
    padding-left: 0.9rem;
    padding-top: 1.5rem;
    gap: 2rem;
  }
}

/* Origin note — sits below the oldest entry in the flex column, no dot.
   Fades in on a gentle delay so it rewards the scroll rather than competing
   with the first render. Leading 鴨 kanji colored like the goshuin seal. */
.walk-origin {
  display: flex;
  align-items: baseline;
  gap: 0.55rem;
  margin-top: 2.5rem;
  padding-top: 1.5rem;
  font-family: var(--font-display, "Cormorant Garamond"), Georgia, serif;
  font-style: italic;
  font-size: 0.95rem;
  color: var(--walk-ink-softer);
  opacity: 0;
  animation: walk-origin-fade 1400ms ease-out 800ms forwards;
}
.walk-origin-duck {
  color: var(--walk-red-seal);
  font-family: "Hiragino Mincho ProN", "Hiragino Mincho Pro", "Yu Mincho", serif;
  font-style: normal;
  font-size: 1.25em;
  line-height: 1;
  font-weight: 500;
  opacity: 0.88;
}
.walk-origin-text { letter-spacing: 0.02em; }
@keyframes walk-origin-fade {
  to { opacity: 0.72; }
}
@media (prefers-reduced-motion: reduce) {
  .walk-origin { animation: none; opacity: 0.72; }
}

.walk-entry {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  transition: opacity 400ms ease;
  opacity: 0;
  animation: walk-appear 600ms ease-out forwards;
  animation-delay: calc(var(--dot-i, 0) * 180ms + 500ms);
}

.walk-entry-meta {
  display: flex;
  gap: 0.6rem;
  align-items: baseline;
  flex-wrap: wrap;
  font-size: 0.7rem;
  color: var(--walk-ink-softer);
  text-transform: uppercase;
  letter-spacing: 0.16em;
  font-family: var(--font-ui, "Lato"), "Helvetica Neue", sans-serif;
  font-weight: 500;
}

.walk-entry-moon {
  display: inline-flex;
  align-items: center;
  vertical-align: middle;
  opacity: 0.7;
}

.walk-entry-weather,
.walk-entry-km {
  font-weight: 400;
  letter-spacing: 0.12em;
  text-transform: none;
  font-style: italic;
  font-family: var(--font-display, "Cormorant Garamond"), Georgia, serif;
  font-size: 0.85rem;
  color: var(--walk-ink-softer);
}

.walk-entry-meta-sub {
  flex-basis: 100%;
  display: flex;
  gap: 0.7rem;
  align-items: baseline;
  margin-top: 0.1rem;
}

.walk-entry-date {
  font-variant-numeric: tabular-nums;
}

.walk-entry-stage {
  font-style: italic;
  text-transform: none;
  letter-spacing: 0.02em;
  color: var(--walk-ink-soft);
  font-family: var(--font-display, "Cormorant Garamond"), Georgia, serif;
  font-size: 0.88rem;
  font-weight: 400;
}

.walk-entry-stage-ja {
  font-size: 0.78rem;
  color: var(--walk-ink-softer);
  font-style: normal;
  letter-spacing: 0.06em;
  margin-left: 0.5rem;
  font-family: "Hiragino Mincho ProN", "Hiragino Mincho Pro", "Yu Mincho", "YuMincho", "MS Mincho", serif;
}

.walk-entry-glyph {
  font-size: 1.4rem;
  line-height: 1;
  color: var(--walk-ink);
  margin-top: 0.1rem;
}

.walk-entry-body {
  display: flex;
  flex-direction: column;
  gap: 0.7em;
  font-size: 1.18rem;
  line-height: 1.6;
  color: var(--walk-ink);
  margin-top: 0.2rem;
}

.walk-entry-body p { margin: 0; }

/* Kind-specific entry treatments */

/* A silence is a silence — no "( silence )" label announcing itself.
   The entry is just the meta row + a faint glyph; no body. The shorter
   card compresses the gap to the next dot, which reads as "a quiet day". */
.walk-entry--silence .walk-entry-body { display: none; }
.walk-entry--silence .walk-entry-glyph {
  opacity: 0.35;
  font-size: 1.05rem;
}
.walk-entry--silence .walk-entry-stage,
.walk-entry--silence .walk-entry-date { opacity: 0.55; }

.walk-entry--threshold {
  padding: 0.75rem 0;
  position: relative;
}
.walk-entry--threshold .walk-entry-glyph { font-size: 1.9rem; }
.walk-entry--threshold .walk-entry-body {
  font-size: 1.3rem;
  font-style: italic;
  letter-spacing: 0.01em;
}

/* Goshuin-style red seal for threshold entries */
.walk-entry--threshold::before {
  content: "";
  position: absolute;
  top: 0.2rem;
  right: 0.2rem;
  width: 48px;
  height: 48px;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 48 48'><defs><filter id='s' x='-15' y='-15' width='130' height='130'><feTurbulence type='fractalNoise' baseFrequency='1.1' numOctaves='2' seed='19' result='n'/><feDisplacementMap in='SourceGraphic' in2='n' scale='2.3'/></filter></defs><g filter='url(%23s)' fill='none' stroke='%23a43a2e' stroke-width='2' opacity='0.78'><rect x='6' y='6' width='36' height='36'/><rect x='10' y='10' width='28' height='28'/><line x1='24' y1='12' x2='24' y2='36'/><line x1='12' y1='24' x2='36' y2='24'/></g></svg>");
  background-size: contain;
  background-repeat: no-repeat;
  opacity: 0.72;
  transform: rotate(-4deg);
  pointer-events: none;
}

.walk-entry--letter .walk-entry-body {
  font-size: 1rem;
  line-height: 1.75;
  max-width: 560px;
  color: var(--walk-ink);
  opacity: 0.88;
}
.walk-entry--letter .walk-entry-glyph { font-size: 1.05rem; opacity: 0.55; }

.walk-entry-author {
  font-style: italic;
  font-size: 0.85rem;
  color: var(--walk-ink-softer);
  margin-top: 0.25rem;
  font-family: var(--font-display, "Cormorant Garamond"), Georgia, serif;
}

/* Age fade */
.walk-entry--age-soft { opacity: 0.72; }
.walk-entry--age-distant { opacity: 0.42; }
.walk-entry--age-distant .walk-entry-body,
.walk-entry--age-distant .walk-entry-author { display: none; }

/* Empty */
.walk-empty {
  grid-column: 1 / -1;
  text-align: center;
  color: var(--walk-ink-softer);
  font-style: italic;
  padding: 4rem 0;
}

/* Ripple on newest dot */
@keyframes walk-ripple {
  0%   { r: 11; opacity: 0.38; stroke-width: 1.4; }
  100% { r: 34; opacity: 0;    stroke-width: 0.25; }
}

.walk-dot-ripple {
  animation: walk-ripple 2.6s ease-out infinite;
  transform-origin: center;
}
.walk-dot-ripple--delayed { animation-delay: 1.3s; }

@media (prefers-reduced-motion: reduce) {
  .walk-path-segment, .walk-path-fiber, .walk-dot-group,
  .walk-entry, .walk-duck-marker,
  .walk-dot-ripple, .walk-dot-ripple--delayed {
    animation: none;
    opacity: 1;
  }
  .walk-dot-ripple, .walk-dot-ripple--delayed { opacity: 0.18; }
}

/* Footer */
.walk-footer {
  margin-top: 5rem;
  text-align: center;
  position: relative;
  z-index: 1;
}
.walk-tagline {
  font-size: 0.72rem;
  color: var(--walk-ink-faintest);
  font-style: italic;
  letter-spacing: 0.04em;
  margin: 0;
}
.walk-source {
  margin: 1.5rem 0 0;
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  font-family: var(--font-ui, "Lato"), "Helvetica Neue", sans-serif;
}
.walk-source a {
  color: var(--walk-ink-faintest);
  text-decoration: none;
  border-bottom: none;
  transition: color 300ms ease;
  padding: 0.3rem 0.6rem;
}
.walk-source a:hover,
.walk-source a:focus,
.walk-source a:focus-visible {
  color: var(--walk-ink-softer);
  outline: none;
  border-bottom-color: transparent;
}

/* Current-stage goshuin — hand-stamped circular seal at bottom-left, mirrors
   the Pilgrim app's circular reliquary seal and the OG card composition. */
.walk-stage-seal {
  position: fixed;
  bottom: 2rem;
  left: 2rem;
  width: 78px;
  height: 78px;
  transform: rotate(-4deg);
  z-index: 1;
  pointer-events: none;
  opacity: 0.85;
}
.walk-stage-seal svg {
  width: 100%;
  height: 100%;
}
.walk-stage-seal-frame {
  fill: none;
  stroke: var(--walk-red-seal);
  stroke-width: 1.6;
  stroke-opacity: 0.8;
}
.walk-stage-seal-frame-inner {
  fill: none;
  stroke: var(--walk-red-seal);
  stroke-width: 1.1;
  stroke-opacity: 0.6;
}
.walk-stage-seal-kanji {
  font-family: "Hiragino Mincho ProN", "Hiragino Mincho Pro", "Yu Mincho", "MS Mincho", serif;
  font-weight: 600;
  fill: var(--walk-red-seal);
  fill-opacity: 0.85;
  text-anchor: middle;
}

@media (max-width: 640px) {
  .walk-stage-seal {
    /* Smaller + fainter on mobile so the seal doesn't sit on top of the
       centered footer tagline. Still visible, just more ghostly. */
    width: 48px;
    height: 48px;
    bottom: 1rem;
    left: 0.75rem;
    opacity: 0.55;
  }
}

[data-theme="dark"] .walk-stage-seal-frame,
[data-theme="dark"] .walk-stage-seal-frame-inner { stroke-opacity: 0.5; }
[data-theme="dark"] .walk-stage-seal-kanji { fill-opacity: 0.6; }

body.constellation .walk-stage-seal-frame,
body.constellation .walk-stage-seal-frame-inner { stroke-opacity: 0.75; }
body.constellation .walk-stage-seal-kanji { fill-opacity: 0.85; }

/* Goshuin accumulator — one red ink seal per completed route */
.walk-goshuin-row {
  display: flex;
  justify-content: center;
  gap: 0.8rem;
  margin: 0 0 2rem;
  min-height: 0;
}
.walk-goshuin-row:empty { display: none; }
.walk-goshuin {
  width: 42px;
  height: 42px;
  opacity: 0.78;
  transform: rotate(-3deg);
  filter: url(#sumi-dot-3);
}
.walk-goshuin + .walk-goshuin { transform: rotate(2deg); }
.walk-goshuin + .walk-goshuin + .walk-goshuin { transform: rotate(-4deg); }

/* ---- Star mode — walk-specific palette + overlays.
       Stars themselves come from shared universe.js canvas. ---- */

html:has(body.constellation) {
  background: #0a0a12;
}

body.constellation {
  --walk-parchment: #0e0d14;
  --walk-parchment-edge: #07060a;
  --walk-ink: #e8dfc6;
  --walk-ink-soft: rgba(232, 223, 198, 0.65);
  --walk-ink-softer: rgba(232, 223, 198, 0.42);
  --walk-ink-faintest: rgba(232, 223, 198, 0.22);
  --walk-stone: #b99870;
  --walk-moss: #8ea886;
  --walk-rust: #c97d5e;
  --walk-dawn: #dca476;
  --walk-red-seal: #c04e3e;
}

body.constellation .walk-body::before { opacity: 0; }
body.constellation .walk-body::after {
  background: radial-gradient(ellipse at top, rgba(255,255,255,0.04) 0%, transparent 60%);
  opacity: 1;
}

/* ---- Page breathes — 8s radial pulse, sets the tempo ---- */

.walk-breathe {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background: radial-gradient(ellipse at center, rgba(139, 115, 85, 0.06), transparent 68%);
  opacity: 0;
  animation: walk-breathe-pulse 8s ease-in-out infinite alternate;
}
@keyframes walk-breathe-pulse {
  from { opacity: 0; }
  to   { opacity: 1; }
}
[data-theme="dark"] .walk-breathe {
  background: radial-gradient(ellipse at center, rgba(232, 223, 198, 0.04), transparent 70%);
}
body.constellation .walk-breathe {
  background: radial-gradient(ellipse at center, rgba(185, 152, 112, 0.07), transparent 64%);
}
@media (prefers-reduced-motion: reduce) {
  .walk-breathe { animation: none; opacity: 0.4; }
}


/* ---- Seasonal drift — one particle every 12s ---- */

.walk-drift {
  position: fixed;
  top: -40px;
  pointer-events: none;
  z-index: 1;
  will-change: transform, opacity;
  user-select: none;
  /* Default 22s duration so the CSS is self-sufficient; JS overrides
     per-particle to randomize between 18-26s. */
  animation: walk-drift-fall 22s linear forwards;
}
@keyframes walk-drift-fall {
  0%   { opacity: 0;   transform: translateY(0) translateX(0) rotate(var(--rot, 0deg)); }
  12%  { opacity: 0.8; }
  88%  { opacity: 0.8; }
  100% { opacity: 0;   transform: translateY(110vh) translateX(var(--drift, 0px)) rotate(calc(var(--rot, 0deg) + 360deg)); }
}
.walk-drift--firefly {
  top: auto;
  width: 5px; height: 5px;
  background: radial-gradient(circle, rgba(255, 226, 140, 0.95), rgba(255, 200, 80, 0.35) 55%, transparent 72%);
  border-radius: 50%;
  filter: blur(0.4px);
  animation-name: walk-drift-float;
  animation-duration: 18s;
}
@keyframes walk-drift-float {
  0%   { opacity: 0; transform: translate(0, 0); }
  20%, 80% { opacity: 0.85; }
  50%  { transform: translate(var(--drift, 30px), -40vh); }
  100% { opacity: 0; transform: translate(calc(var(--drift, 30px) * 2), -80vh); }
}
@media (prefers-reduced-motion: reduce) {
  .walk-drift { display: none; }
}

/* ---- Long-press brushstroke — ephemeral ink bloom ---- */

.walk-brush-mark {
  position: fixed;
  pointer-events: none;
  z-index: 3;
  width: 120px; height: 50px;
  overflow: visible;
  opacity: 0;
  transform: translate(-50%, -50%) rotate(var(--mark-rot, 0deg)) scale(calc(var(--mark-scale, 1) * 0.3));
  animation: walk-brush-bloom 3000ms ease-out forwards;
}
@keyframes walk-brush-bloom {
  0%   { opacity: 0;    transform: translate(-50%, -50%) rotate(var(--mark-rot, 0deg)) scale(calc(var(--mark-scale, 1) * 0.3)); }
  18%  { opacity: 0.85; transform: translate(-50%, -50%) rotate(var(--mark-rot, 0deg)) scale(var(--mark-scale, 1)); }
  100% { opacity: 0;    transform: translate(-50%, -50%) rotate(var(--mark-rot, 0deg)) scale(calc(var(--mark-scale, 1) * 1.18)); }
}
@media (prefers-reduced-motion: reduce) {
  .walk-brush-mark { display: none; }
}

/* Satellite splatter — 1-3 ink dots fleck outward from the stroke center.
   Dots start AT the stroke origin and animate to their destination
   (--dx, --dy) during the first 18% of the animation, reading as ink
   flecking off the brush as it lifts. Uses currentColor so red strokes
   get red splatters. */
.walk-splatter {
  position: fixed;
  width: var(--size, 6px);
  height: var(--size, 6px);
  border-radius: 50%;
  background: currentColor;
  pointer-events: none;
  z-index: 3;
  opacity: 0;
  /* sumi-dot (gentler than sumi-dot-3) gives the edge a slight organic
     irregularity without fragmenting small dots. */
  filter: url(#sumi-dot);
  transform: translate(-50%, -50%);
  animation: walk-splatter-fly 2700ms ease-out forwards;
  animation-delay: var(--delay, 0ms);
}
@keyframes walk-splatter-fly {
  0%   {
    opacity: 0;
    transform: translate(-50%, -50%) translate(0, 0) scale(0.4);
  }
  18%  {
    opacity: 0.75;
    transform: translate(-50%, -50%) translate(var(--dx, 0px), var(--dy, 0px)) scale(1);
  }
  55%  {
    opacity: 0.75;
    transform: translate(-50%, -50%) translate(var(--dx, 0px), var(--dy, 0px)) scale(1);
  }
  100% {
    opacity: 0;
    transform: translate(-50%, -50%) translate(var(--dx, 0px), var(--dy, 0px)) scale(1.15);
  }
}
@media (prefers-reduced-motion: reduce) {
  .walk-splatter { display: none; }
}

/* Constellation-mode alternate for long-press — 3-5 glowing dots scatter
   around the pointer instead of an ink stroke. */
.walk-star-puff {
  position: fixed;
  width: var(--size, 3px);
  height: var(--size, 3px);
  border-radius: 50%;
  background: rgba(255, 245, 210, 0.95);
  box-shadow: 0 0 6px 2px rgba(255, 226, 180, 0.55);
  pointer-events: none;
  z-index: 3;
  opacity: 0;
  transform: translate(-50%, -50%) scale(0);
  animation: walk-star-puff 1600ms ease-out forwards;
  animation-delay: var(--delay, 0ms);
}
@keyframes walk-star-puff {
  0%   { opacity: 0;   transform: translate(-50%, -50%) scale(0); }
  15%  { opacity: 1;   transform: translate(-50%, -50%) scale(1.3); }
  60%  { opacity: 0.8; transform: translate(-50%, -50%) scale(1); }
  100% { opacity: 0;   transform: translate(-50%, -50%) scale(0.7); }
}
@media (prefers-reduced-motion: reduce) {
  .walk-star-puff { display: none; }
}

/* ---- Duck marker — hover bob + click spring + plink ring ---- */

.walk-duck-marker {
  transform-box: fill-box;
  transform-origin: center;
  transition: transform 300ms cubic-bezier(0.34, 1.56, 0.64, 1);
}
.walk-duck-link:hover .walk-duck-marker {
  transform: translateY(-2px) scale(1.06);
}
.walk-duck-link:active .walk-duck-marker {
  transform: scale(0.88);
  transition-duration: 110ms;
}
.walk-duck-plink {
  fill: none;
  stroke: var(--walk-ink);
  stroke-width: 1.3;
  stroke-opacity: 0;
  pointer-events: none;
  /* Use transform:scale instead of animating the `r` attribute — Safari 16
     and earlier don't support CSS animation of SVG geometry attributes. The
     circle is drawn at r=4 by JS; CSS scales it up to 5.5× (effective r=22).
     `vector-effect: non-scaling-stroke` keeps the stroke at 1.3 throughout
     so the ripple stays thin instead of thickening as it expands. */
  transform-box: fill-box;
  transform-origin: center;
  vector-effect: non-scaling-stroke;
  animation: walk-duck-plink 620ms ease-out forwards;
}
@keyframes walk-duck-plink {
  0%   { stroke-opacity: 0.6; transform: scale(1); }
  100% { stroke-opacity: 0;   transform: scale(5.5); }
}
@media (prefers-reduced-motion: reduce) {
  .walk-duck-marker { transition: none; }
  .walk-duck-link:hover .walk-duck-marker,
  .walk-duck-link:active .walk-duck-marker { transform: none; }
  .walk-duck-plink { display: none; }
}

/* ---- Star mode (shared system) ---- */
#universe-canvas {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  display: none;
}

body.constellation #moon-toggle canvas {
  animation: star-toggle-breathe 4s ease-in-out infinite;
}

@keyframes star-toggle-breathe {
  0%, 100% {
    filter: drop-shadow(0 0 3px rgba(232, 224, 255, 0.35));
    transform: scale(1);
  }
  50% {
    filter: drop-shadow(0 0 9px rgba(232, 224, 255, 0.7));
    transform: scale(1.05);
  }
}

@media (prefers-reduced-motion: reduce) {
  body.constellation #moon-toggle canvas {
    animation: none;
    filter: drop-shadow(0 0 5px rgba(232, 224, 255, 0.5));
  }
}