/* ============================================================================
   sc-devices.css — DEVICES layer of scrollcraft.css, sliced for static pages
   ----------------------------------------------------------------------------
   Origin: scroll-craft (nateherkai/scroll-craft), plugins/nateherk-design/
   skills/scroll-craft/engine/scrollcraft.css — vendored 2026-09-04, MIT.
   Slice policy: ONLY rules the engine drives (selectors on .sc-* / [data-sc-*]).
   The source's TOKENS layer (dark-canvas colour roles, Instrument-Sans type
   ramp, spacing scale, elevation) is deliberately NOT vendored: a host page
   owns its own design language. The reduced-motion and mobile blocks are kept
   from the source, minus the worldflight rules (worldflight is out of scope).

   Host pages: map the motion tokens below onto YOUR OWN variables (see the
   block at the top) and style your own markup; do not restyle these rules.
   ========================================================================== */

/* --- minimal motion/geometry tokens, wired to the host page's theme -------- */
:root{
  /* Hosts override these from their own design tokens, e.g. KOVAH maps:
     --sc-canvas: var(--coll-bg,#fff); --sc-ink: var(--coll-ink,#111);
     --sc-accent: var(--coll-accent,#111); --sc-accent-soft: var(--coll-accent-soft,#eee); */
  --sc-canvas: #fff;
  --sc-ink: #111;
  --sc-accent: #111;
  --sc-ease-out: cubic-bezier(0.23, 1, 0.32, 1);
  --sc-d-slow: 420ms;
  --sc-gutter: clamp(1.25rem, 5vw, 5.5rem);
  --sc-z-stage: 1; --sc-z-copy: 20; --sc-z-chrome: 60;
  --sc-scrim-angle: 180deg;
}

/* =============================================================== DEVICES ==
   Driven by the engine (engine/scrollcraft.js). Restyle your own markup, not
   these. */

.sc-act--pinned { position: relative; }
.sc-stage {
  position: sticky; top: 0;
  height: 100vh; height: 100svh;
  overflow: clip;
  z-index: var(--sc-z-stage);
}

/* scrub / sequence media */
.sc-stage :is(video[data-sc-scrub], canvas[data-sc-sequence], .sc-stage__poster) {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  object-fit: cover;
}
video[data-sc-scrub] { opacity: 0; transition: opacity 380ms var(--sc-ease-out); }
.sc-has-clip video[data-sc-scrub] { opacity: 1; }
/* The poster is a live frame-holder, not a placeholder: it stays up until a
   real video frame has painted, which is what stops the blank-stage flash. */
.sc-stage__poster { z-index: 0; transition: opacity 380ms var(--sc-ease-out); }
.sc-has-clip .sc-stage__poster { opacity: 0; }

/* A scrim only where text sits. A full-frame darkening layer flattens the
   image everywhere to fix contrast in one corner. */
.sc-scrim {
  position: absolute; inset: 0; pointer-events: none; z-index: 1;
  background: linear-gradient(
    var(--sc-scrim-angle),
    color-mix(in oklab, var(--sc-canvas) var(--sc-scrim-a, 78%), transparent) 0%,
    color-mix(in oklab, var(--sc-canvas) 30%, transparent) 42%,
    transparent 68%);
}
/* Point the scrim at the copy. */
.sc-scrim--bottom { --sc-scrim-angle: 0deg; }
.sc-scrim--left   { --sc-scrim-angle: 90deg; }
.sc-scrim--right  { --sc-scrim-angle: 270deg; }

/* Corner scrims, for copy anchored to a corner. */
.sc-scrim--lead {
  background: linear-gradient(to top right,
    color-mix(in oklab, var(--sc-canvas) 94%, transparent) 0%,
    color-mix(in oklab, var(--sc-canvas) 72%, transparent) 30%,
    color-mix(in oklab, var(--sc-canvas) 30%, transparent) 52%,
    transparent 72%);
}
.sc-scrim--trail {
  background: linear-gradient(to top left,
    color-mix(in oklab, var(--sc-canvas) 94%, transparent) 0%,
    color-mix(in oklab, var(--sc-canvas) 72%, transparent) 30%,
    color-mix(in oklab, var(--sc-canvas) 30%, transparent) 52%,
    transparent 72%);
}
/* A band across the bottom, for copy that spans the full width of the frame. */
.sc-scrim--band {
  background: linear-gradient(to top,
    color-mix(in oklab, var(--sc-canvas) 94%, transparent) 0%,
    color-mix(in oklab, var(--sc-canvas) 74%, transparent) 22%,
    color-mix(in oklab, var(--sc-canvas) 30%, transparent) 42%,
    transparent 58%);
}
.sc-scrim--vignette {
  background: radial-gradient(120% 90% at 50% 45%, transparent 40%,
              color-mix(in oklab, var(--sc-canvas) 70%, transparent) 100%);
}

/* copy over a stage. max-width in rem, never ch. */
.sc-copy {
  position: absolute; z-index: var(--sc-z-copy);
  inset-inline: var(--sc-gutter);
  max-width: min(46rem, 76vw);
  will-change: opacity, transform;
}
.sc-copy--lead   { left: var(--sc-gutter); bottom: clamp(3rem, 12vh, 9rem); }
/* inset-inline FIRST: it is shorthand for left+right, so declaring it after
   `left: 50%` resets left to auto and the block drifts off the left edge. */
.sc-copy--center { inset-inline: auto; left: 50%; top: 50%; translate: -50% -50%; text-align: center; }
.sc-copy--trail  { inset-inline: auto; right: var(--sc-gutter); bottom: clamp(3rem, 12vh, 9rem); text-align: right; }

/* cue defaults: the engine writes opacity/transform inline; these are the
   pre-paint state so nothing flashes before the first read() */
[data-sc-cue] { opacity: 0; will-change: opacity, transform; }
.sc-ready [data-sc-cue] { transition: none; }

/* kinetic split */
.sc-split { display: inline-block; overflow: hidden; vertical-align: top; }
/* Descenders live below the baseline; a line mask clipped to the line box eats
   the tails off g, y, p, j. The padding buys them room back. */
.sc-split--line { display: block; padding-bottom: 0.14em; margin-bottom: -0.14em; }
.sc-split__i { display: inline-block; will-change: transform, opacity; }
.sc-is-split { opacity: 1 !important; }

/* horizontal rail */
[data-sc-pan] { display: flex; will-change: transform; }

/* reveal + parallax */
[data-sc-reveal] { will-change: clip-path; }
[data-sc-parallax] { will-change: transform; }

/* flow reveal (fires once) */
[data-sc-in], [data-sc-stagger] > * {
  opacity: 0;
  transform: translate3d(0, 14px, 0);
  transition: opacity 620ms var(--sc-ease-out), transform 620ms var(--sc-ease-out);
}
[data-sc-in].sc-in, [data-sc-stagger] > .sc-in { opacity: 1; transform: none; }

/* pointer devices */
[data-sc-tilt] { transform-style: preserve-3d; will-change: transform; }
[data-sc-magnet] { will-change: transform; }
/* isolation always; position only if nothing more specific already set it.
   Written with :where() (zero specificity) on purpose. */
[data-sc-spotlight] { isolation: isolate; }
:where([data-sc-spotlight]) { position: relative; }
[data-sc-spotlight]::after {
  content: ""; position: absolute; inset: 0; pointer-events: none; z-index: 2;
  background: radial-gradient(
    28rem 28rem at calc(var(--sc-mx, 0.5) * 100%) calc(var(--sc-my, 0.5) * 100%),
    color-mix(in oklab, var(--sc-accent) 16%, transparent), transparent 70%);
  opacity: 0; transition: opacity var(--sc-d-slow) var(--sc-ease-out);
}
[data-sc-spotlight]:hover::after { opacity: 1; }

/* scroll progress */
[data-sc-progress] {
  position: fixed; inset: 0 0 auto 0; height: 2px; z-index: var(--sc-z-chrome);
  background: var(--sc-accent); transform-origin: 0 50%; transform: scaleX(0);
  will-change: transform;
}

/* ----------------------------------------------------------- atmosphere --
   Depth is not only shadow. Grain keeps a flat light ground from banding. */
.sc-grain { position: fixed; inset: 0; pointer-events: none; z-index: 3; opacity: 0.045; }
.sc-grain::before {
  content: ""; position: absolute; inset: -50%;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='140' height='140'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3'/></filter><rect width='140' height='140' filter='url(%23n)'/></svg>");
}

/* -------------------------------------------------------- reduced motion --
   Fewer and gentler, not zero. Opacity still carries the reveal so the page
   is comprehensible; every position change is dropped. */
@media (prefers-reduced-motion: reduce) {
  [data-sc-in], [data-sc-stagger] > * { transform: none; transition-duration: 220ms; }
  [data-sc-parallax], [data-sc-pan], .sc-split__i { transform: none !important; }
  /* A wipe is a position change too. Show reveal content settled. */
  [data-sc-reveal] { clip-path: none !important; }
  /* A rail's transform IS its navigation. Hand the travel back to the reader
     as an ordinary scroll region instead. */
  [data-sc-act="pan"] .sc-stage,
  [data-sc-act="pan"] [data-sc-stage] {
    overflow-x: auto; overflow-y: hidden;
    overscroll-behavior-x: contain;
    scroll-snap-type: x proximity;
  }
  [data-sc-pan] > * { scroll-snap-align: center; }
  [data-sc-spotlight]::after { display: none; }
}

/* --------------------------------------------------------------- mobile --
   On light pages the corner scrims re-anchor to a bottom band so copy never
   sits over a bright clip corner. */
@media (max-width: 860px) {
  .sc-copy { inset-inline: var(--sc-gutter); max-width: none; }
  .sc-copy--trail { text-align: left; }
  .sc-stage { height: 100svh; }
  .sc-scrim--lead, .sc-scrim--trail {
    background: linear-gradient(to top,
      color-mix(in oklab, var(--sc-canvas) 94%, transparent) 0%,
      color-mix(in oklab, var(--sc-canvas) 74%, transparent) 22%,
      color-mix(in oklab, var(--sc-canvas) 30%, transparent) 42%,
      transparent 58%);
  }
}