/* ==========================================================================
   Technique sequences — triggers, incantation typography, dissolve / return,
   canvas layer, footer controls.

   Loaded after theme.css so the dissolve rules win the cascade over .reveal.
   ========================================================================== */

/* Registered so the underline colour can actually interpolate on hover, and
   inheriting so ::after (the glow bar) resolves the same value the button has.
   Browsers without @property still get the colour change, just instantly. */
@property --tc {
  syntax: "<color>";
  inherits: true;
  initial-value: #888888;
}

@property --tc-hi {
  syntax: "<color>";
  inherits: true;
  initial-value: #cccccc;
}

/* --------------------------------------------------------------------------
   triggers
   -------------------------------------------------------------------------- */

.tech-trigger {
  position: relative;
  display: inline-block;
  margin: 0;
  padding: 0 0 3px;
  border: 0;
  -webkit-appearance: none;
  appearance: none;
  background-color: transparent;
  font: inherit;
  line-height: 1; /* keeps the inline-block out of the paragraph's line box */
  vertical-align: baseline;
  color: var(--text-strong);
  cursor: inherit;
  text-shadow: 0 0 0 transparent;

  /* the 2px underline itself */
  background-image: linear-gradient(
    90deg,
    transparent 0%,
    var(--tc) 16%,
    var(--tc-hi) 50%,
    var(--tc) 84%,
    transparent 100%
  );
  background-repeat: no-repeat;
  background-size: 100% 0;
  background-position: 0 100%;

  transition: color 180ms cubic-bezier(0.2, 0.7, 0.3, 1),
    text-shadow 180ms cubic-bezier(0.2, 0.7, 0.3, 1), --tc 180ms cubic-bezier(0.2, 0.7, 0.3, 1),
    --tc-hi 180ms cubic-bezier(0.2, 0.7, 0.3, 1);
}

/* the glow, blurred underneath the crisp line */
.tech-trigger::after {
  content: "";
  position: absolute;
  left: -3px;
  right: -3px;
  bottom: 0;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, transparent 0%, var(--tc-hi) 22%, var(--tc-hi) 78%, transparent 100%);
  opacity: 0;
  filter: blur(4px);
  pointer-events: none;
  transition: opacity 180ms cubic-bezier(0.2, 0.7, 0.3, 1), filter 180ms cubic-bezier(0.2, 0.7, 0.3, 1);
}

.tech-trigger:hover,
.tech-trigger:focus-visible {
  color: var(--tc-hi);
  text-shadow: 0 0 10px var(--tc-glow);
}

.tech-trigger:hover::after,
.tech-trigger:focus-visible::after {
  opacity: 0.9;
  filter: blur(5px);
}

.tech-trigger:focus-visible {
  outline: 2px solid var(--tc-hi);
  outline-offset: 4px;
  border-radius: 3px;
}

.tech-trigger[disabled] {
  pointer-events: none;
}

/* The affordance only appears once the module that honours it has booted.
   Without it these are plain words in the sentence, not dead buttons. */
html.js-technique .tech-trigger {
  background-size: 100% 2px;
  cursor: pointer;
}

html:not(.js-technique) .tech-trigger {
  display: inline;
}

html:not(.js-technique) .tech-trigger::after {
  display: none;
}

/* All three share one neutral rule -- white on the dark palettes, the theme's
   own ink on the light ones where white would vanish. The show colours belong
   to the sequences, not to the sentence. */
.tech-trigger {
  --tc: var(--rule);
  --tc-hi: var(--rule-hi);
  --tc-glow: var(--rule-glow);
}

.tech-trigger:hover,
.tech-trigger:focus-visible {
  --tc: var(--rule-hi);
}

/* --------------------------------------------------------------------------
   sequence chrome
   -------------------------------------------------------------------------- */

/* Scroll lock. Pinning the body rather than hiding html's overflow keeps the
   page visually where it was -- otherwise it snaps to the top mid-dissolve,
   while the content is still visible. --scrollbar-w replaces the width the
   scrollbar gave up so nothing reflows. */
html.is-sequence {
  overflow: hidden;
}

html.is-sequence body {
  position: fixed;
  top: var(--lock-top, 0px);
  left: 0;
  right: var(--scrollbar-w, 0px);
  overflow: hidden;
}

html.is-paused .incant .incant__word {
  animation-play-state: paused;
}

html.is-sequence .page {
  transform: translate3d(var(--shake-x, 0px), var(--shake-y, 0px), 0) scale(var(--ghost-scale, 1));
}

/* Beat 1 of the domain expansion: the page comes back as a warped ghost for
   the bubble to swallow, instead of being flatly absent. */
.page--ghost {
  opacity: var(--ghost-o, 1);
  filter: blur(var(--ghost-blur, 0px)) saturate(0.3) brightness(1.35);
}

.dissolve-unit {
  will-change: opacity, filter;
}

html.is-sequence .dissolve-unit {
  transition: opacity var(--dsv-dur, 340ms) var(--dsv-ease, cubic-bezier(0.4, 0, 0.6, 0.15)),
    filter var(--dsv-dur, 340ms) var(--dsv-ease, cubic-bezier(0.4, 0, 0.6, 0.15));
  transition-delay: var(--dsv-delay, 0ms);
}

html.is-dissolved .dissolve-unit {
  opacity: var(--dsv-floor, 0);
  filter: blur(6px);
}

.technique-canvas {
  position: fixed;
  inset: 0;
  z-index: 90;
  width: 100%;
  height: 100%;
  display: block;
  pointer-events: none;
  opacity: 1;
  will-change: opacity;
}

.technique-canvas.is-washing {
  opacity: 0;
  transition: opacity var(--wash-dur, 800ms) cubic-bezier(0.35, 0, 0.65, 1);
}

/* --------------------------------------------------------------------------
   incantation
   -------------------------------------------------------------------------- */

.incant {
  position: fixed;
  inset: 0;
  z-index: 92;
  display: grid;
  place-items: center;
  padding: 0 5vw;
  pointer-events: none;
  text-align: center;
  /* Bankai and Domain Expansion are title cards, not page copy -- a high-
     contrast old-style serif reads as the announcement it is. Naruto has no
     incantation, so this rule only ever paints those two. */
  font-family: "Cormorant Garamond", "Times New Roman", Times, serif;
  color: var(--inc-core);
  -webkit-font-smoothing: antialiased;
}

.incant__stack {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: clamp(0.5rem, 1.6vw, 1.1rem);
  max-width: 100%;
}

.incant__line {
  margin: 0;
  line-height: 1.35;
  text-shadow: 0 0 3px var(--inc-core), 0 0 10px var(--inc-core), 0 0 28px var(--inc-halo);
}

/* Both lines are sized up from the body-copy scale they used under the mono
   face: Garamond's x-height is short, so the same rem value reads smaller.

   Tracking hangs a gap off the last character, which would sit the line left
   of centre. It is static now, so a matching negative margin cancels it
   exactly. */
.incant__line--word {
  letter-spacing: 0.34em;
  margin-right: -0.34em;
  font-size: clamp(0.95rem, 2.1vw, 1.15rem);
  font-weight: 500;
  text-transform: uppercase;
  opacity: 0.9;
}

/* The technique's name, set larger and in italic -- the flourish the word
   above deliberately does not have. */
.incant__line--name {
  letter-spacing: 0.03em;
  margin-right: -0.03em;
  font-size: clamp(1.6rem, 4.2vw, 2.6rem);
  font-style: italic;
  font-weight: 400;
}

/* Whole words, not characters. Each one settles as a unit and the next waits
   its turn, so the phrase arrives at reading speed. */
.incant__word {
  display: inline-block;
  opacity: 0;
  will-change: opacity, transform, filter;
}

/* The stack is built during DISSOLVE so layout is already resolved; `is-live`
   is what releases the reveal on the INCANT beat. */
.incant.is-live .incant__word {
  animation: word-in var(--word-dur, 720ms) cubic-bezier(0.16, 1, 0.3, 1) both;
  animation-delay: calc(var(--i) * var(--word-stagger, 780ms));
}

@keyframes word-in {
  from {
    opacity: 0;
    filter: blur(9px);
    transform: translateY(11px) scale(0.985);
  }

  to {
    opacity: 1;
    filter: blur(0);
    transform: none;
  }
}

/* --- dispersal, one per show ------------------------------------------- */

/* Bleach: each word breaks up where it stands while the renderer spawns a
   petal cluster from its rect. */
.incant.is-live.incant--shatter .incant__word {
  animation: word-shatter 760ms cubic-bezier(0.32, 0, 0.68, 0.6) both;
  animation-delay: calc(var(--i) * 120ms);
}

@keyframes word-shatter {
  0% {
    opacity: 1;
    filter: blur(0);
    transform: none;
  }

  35% {
    opacity: 0.62;
    filter: blur(1.5px);
    transform: translateY(-2px) scale(1.03);
  }

  100% {
    opacity: 0;
    filter: blur(6px);
    transform: translateY(-9px) scale(1.07);
  }
}

/* JJK: pulled toward the vanishing point, accelerating, blur climbing. */
.incant.is-live.incant--implode .incant__word {
  animation: word-implode 900ms cubic-bezier(0.55, 0, 0.85, 0.35) both;
  animation-delay: calc(var(--i) * 90ms);
}

@keyframes word-implode {
  0% {
    opacity: 1;
    filter: blur(0);
    transform: translate(0, 0) scale(1);
  }

  60% {
    opacity: 0.7;
    filter: blur(5px);
  }

  100% {
    opacity: 0;
    filter: blur(16px);
    transform: translate(var(--dx, 0px), var(--dy, 0px)) scale(0.16);
  }
}

/* --------------------------------------------------------------------------
   footer controls
   -------------------------------------------------------------------------- */

.site-foot {
  margin: 0 auto;
  max-width: var(--max);
  padding: 0 24px 44px;
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: 20px;
}

@media (max-width: 640px) {
  .site-foot {
    padding: 0 20px 52px;
  }
}

.foot-ctl {
  margin: 0;
  padding: 2px 0;
  border: 0;
  -webkit-appearance: none;
  appearance: none;
  background: transparent;
  font: inherit;
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  text-transform: lowercase;
  color: var(--text-dim);
  opacity: 0.6;
  cursor: pointer;
  transition: opacity 180ms cubic-bezier(0.2, 0.7, 0.3, 1), color 180ms cubic-bezier(0.2, 0.7, 0.3, 1);
}

.foot-ctl:hover,
.foot-ctl:focus-visible {
  opacity: 1;
  color: var(--text-strong);
}

.foot-ctl:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 4px;
  border-radius: 3px;
}

/* Release is tied to the theme, never to the module: the pre-paint snippet in
   <head> can apply a stored theme even if the module fails to load, and there
   has to be a way back out of it in that case. */
html:not([data-theme="sakura"]):not([data-theme="void"]):not([data-theme="sharingan"])
  .foot-ctl--release {
  display: none;
}

/* The sound toggle only means something while the module is live. */
html:not(.js-technique) [data-sound-toggle] {
  display: none;
}

/* --------------------------------------------------------------------------
   reduced motion — the sequence never runs, so only the trigger affordance
   and the footer need to stay sane.
   -------------------------------------------------------------------------- */

@media (prefers-reduced-motion: reduce) {
  .tech-trigger,
  .tech-trigger::after,
  .foot-ctl {
    transition-duration: 1ms;
  }
}