/* Lumina landing page. Theme + page-local styles on top of scrollcraft.css.
   The engine file is never edited; everything here is tokens and own markup. */

:root {
  --sc-canvas:   #0B0F17;
  --sc-surface:  #141B29;
  --sc-ink:      #EAF0F9;
  --sc-ink-soft: #95A4BC;
  --sc-accent:     #8BB9F2;
  --sc-accent-ink: #0A1322;
  --sc-font-display: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --sc-font-text:    -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --sc-font-mono:    ui-monospace, "SF Mono", SFMono-Regular, Menlo, Consolas, monospace;
}

/* ------------------------------------------------------------- buttons -- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5em;
  background: var(--sc-accent);
  color: var(--sc-accent-ink);
  font-weight: 600;
  letter-spacing: var(--sc-track-snug);
  padding: 0.72em 1.3em;
  border-radius: var(--sc-r-md);
  text-decoration: none;
  border: 0;
  transition: background 150ms var(--sc-ease-out), transform 120ms var(--sc-ease-out);
}
.btn:active { transform: translateY(1px) scale(0.985); }
@media (hover: hover) and (pointer: fine) {
  .btn:hover { background: color-mix(in oklab, var(--sc-accent) 86%, white); }
}
.btn--big { font-size: var(--sc-t-lg); }

/* ================================================== ACT 1: the projector == */

.projector .stage { background: #060910; }

/* motion mode: full-bleed player */
.sc-motion .projector .frames {
  position: absolute; inset: 0;
  perspective: 1300px;
}
.sc-motion .projector .frame {
  position: absolute; inset: 0; margin: 0;
  opacity: 0;
  overflow: clip;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  will-change: transform, opacity;
}
.sc-motion .projector .frame:first-child { opacity: 1; }
.sc-motion .kb { position: absolute; inset: 0; will-change: transform; }
.sc-motion .kb img { width: 100%; height: 100%; object-fit: cover; }
.sc-motion .rcap { display: none; }

/* hero copy: top-left, where the Carina sky is dark */
.sc-motion .copy-hero {
  left: var(--sc-gutter);
  top: clamp(4rem, 12vh, 8.5rem);
  bottom: auto;
  max-width: min(42rem, 82vw);
}
.copy-hero .sc-lede { margin-top: var(--sc-5); }
.hero-row {
  margin: var(--sc-6) 0 0;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--sc-4) var(--sc-5);
}
.hero-meta {
  font-family: var(--sc-font-mono);
  font-size: var(--sc-t-xs);
  letter-spacing: var(--sc-track-wide);
  color: var(--sc-ink-soft);
}
.scrim-hero {
  background: linear-gradient(to bottom right,
    color-mix(in oklab, var(--sc-canvas) 88%, transparent) 0%,
    color-mix(in oklab, var(--sc-canvas) 60%, transparent) 34%,
    color-mix(in oklab, var(--sc-canvas) 22%, transparent) 54%,
    transparent 72%);
}

/* transition chips: the player's OSD captions */
.chips {
  position: absolute;
  z-index: var(--sc-z-copy);
  left: var(--sc-gutter);
  right: var(--sc-gutter);
  bottom: clamp(2.6rem, 9vh, 6rem);
  pointer-events: none;
}
.chip {
  position: absolute;
  left: 0; bottom: 0;
  margin: 0;
  max-width: min(28rem, calc(100vw - 2 * var(--sc-gutter)));
  background: color-mix(in srgb, var(--sc-surface) 93%, transparent);
  -webkit-backdrop-filter: blur(16px) saturate(1.15);
  backdrop-filter: blur(16px) saturate(1.15);
  border: 1px solid var(--sc-hairline-strong);
  box-shadow: 0 10px 30px -12px rgba(3, 6, 12, 0.7);
  border-radius: var(--sc-r-md);
  padding: var(--sc-4) var(--sc-5);
}
.chip__name {
  display: block;
  font-family: var(--sc-font-mono);
  font-size: var(--sc-t-xs);
  letter-spacing: var(--sc-track-wide);
  text-transform: uppercase;
  color: var(--sc-accent);
  margin-bottom: var(--sc-2);
}
.chip__fact {
  display: block;
  font-size: var(--sc-t-sm);
  line-height: 1.5;
  color: var(--sc-ink);
}
.chip--bridge .chip__fact { color: var(--sc-ink); }

/* the player readout: fixed chrome, the app's OSD */
.hud {
  position: fixed;
  right: clamp(1rem, 3vw, 2.2rem);
  bottom: calc(clamp(1rem, 3vh, 2rem) + env(safe-area-inset-bottom, 0px));
  z-index: var(--sc-z-chrome);
  display: flex;
  align-items: center;
  gap: 0.65em;
  font-family: var(--sc-font-mono);
  font-size: var(--sc-t-xs);
  letter-spacing: var(--sc-track-wide);
  font-variant-numeric: tabular-nums;
  color: var(--sc-ink);
  background: color-mix(in srgb, var(--sc-surface) 88%, transparent);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  border: 1px solid var(--sc-hairline-strong);
  border-radius: var(--sc-r-pill);
  padding: 0.5em 1em;
  opacity: 0;
  transform: translateY(6px);
  transition: opacity 240ms var(--sc-ease-out), transform 240ms var(--sc-ease-out);
  pointer-events: none;
}
.hud--on { opacity: 1; transform: none; }
.hud__icon { width: 16px; height: 16px; }
.hud__file { color: var(--sc-ink-soft); }
.hud__state { color: var(--sc-ink); min-width: 9ch; white-space: pre; }
html:not(.sc-motion) .hud { display: none; }

/* ================================================ ACT 2: scale modes (pan) == */

.stage--pan { display: flex; align-items: center; }
.rail {
  align-items: center;
  gap: clamp(2rem, 4vw, 3.6rem);
  padding-inline: var(--sc-gutter);
}
.rail__lead { flex: 0 0 auto; width: min(30rem, 78vw); }
.mode { flex: 0 0 auto; width: clamp(20rem, 54vw, 58rem); margin: 0; }
.mode__frame {
  position: relative;
  aspect-ratio: 16 / 10;
  background: #04070D;
  border: 1px solid var(--sc-hairline);
  border-radius: var(--sc-r-lg);
  overflow: clip;
}
.mode__frame img { position: absolute; inset: 0; width: 100%; height: 100%; }
.mode--fit  .mode__img { object-fit: contain; }
.mode--fill .mode__img { object-fit: cover; }
.mode--blur .mode__img { object-fit: contain; z-index: 1; }
.mode__blurbg {
  object-fit: cover;
  filter: blur(26px) brightness(0.85);
  transform: scale(1.15);
}
.mode__cap {
  display: flex;
  align-items: baseline;
  gap: var(--sc-4);
  margin-top: var(--sc-4);
  font-size: var(--sc-t-sm);
}
.mode__cap strong {
  font-family: var(--sc-font-mono);
  font-size: var(--sc-t-xs);
  letter-spacing: var(--sc-track-wide);
  text-transform: uppercase;
  font-weight: 600;
  color: var(--sc-accent);
}
.mode__cap span { color: var(--sc-ink-soft); }

/* staggered settle along the rail, driven from the act's --sc-p */
@media (prefers-reduced-motion: no-preference) {
  .sc-motion .mode {
    opacity: clamp(0.55, calc((var(--sc-p, 1) - var(--at, 0)) * 6 + 1), 1);
    transform: translateX(clamp(0px, calc((var(--at, 0) - var(--sc-p, 1)) * 320px), 44px));
  }
}

/* ============================================= ACT 3: deliberately small == */

.small-intro { max-width: 46rem; }
.window {
  margin: var(--sc-9) 0 0;
  max-width: 58rem;
}
.window img {
  width: 100%; height: auto;
  border-radius: var(--sc-r-lg);
  border: 1px solid var(--sc-hairline-strong);
  box-shadow: 0 24px 60px -24px rgba(3, 6, 12, 0.8);
}
.window figcaption {
  margin-top: var(--sc-4);
  font-size: var(--sc-t-sm);
  color: var(--sc-ink-soft);
}
.facts { margin: var(--sc-10) 0 0; max-width: 58rem; }
.fact {
  display: grid;
  grid-template-columns: minmax(11rem, 16rem) minmax(0, 1fr);
  gap: var(--sc-4) var(--sc-7);
  padding-block: var(--sc-6);
  border-top: 1px solid var(--sc-hairline);
}
.fact dt { font-weight: 600; color: var(--sc-ink); }
.fact dd { margin: 0; color: var(--sc-ink-soft); max-width: var(--sc-measure); text-wrap: pretty; }
.fact dd .sc-nums { color: var(--sc-ink); font-weight: 600; }

/* ======================================================= ACT 4: the close == */

.stage--close { display: flex; flex-direction: column; }
.close {
  flex: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
  gap: clamp(2rem, 5vw, 5rem);
  align-content: center;
  align-items: center;
}
.close__version {
  margin: var(--sc-5) 0 0;
  color: var(--sc-ink-soft);
  max-width: 38ch;
}
.close__cta { margin: var(--sc-6) 0 0; }
.gatekeeper {
  margin-top: var(--sc-7);
  max-width: 44ch;
}
.gatekeeper h3 {
  margin: 0 0 var(--sc-2);
  font-size: var(--sc-t-sm);
  font-weight: 600;
  color: var(--sc-ink);
}
.gatekeeper p {
  margin: 0;
  font-size: var(--sc-t-sm);
  line-height: 1.55;
  color: var(--sc-ink-soft);
  text-wrap: pretty;
}

.picker__label {
  font-family: var(--sc-font-mono);
  font-size: var(--sc-t-xs);
  letter-spacing: var(--sc-track-wide);
  text-transform: uppercase;
  color: var(--sc-ink-soft);
  margin: 0 0 var(--sc-3);
}
.picker__stage {
  position: relative;
  aspect-ratio: 16 / 10;
  border-radius: var(--sc-r-lg);
  border: 1px solid var(--sc-hairline-strong);
  overflow: clip;
  background: #04070D;
  perspective: 1200px;
}
.pframe {
  position: absolute; inset: 0;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  will-change: transform, opacity;
}
.pframe img { width: 100%; height: 100%; object-fit: cover; }
.pframe + .pframe { opacity: 0; }
.picker__buttons {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sc-2);
  margin-top: var(--sc-4);
}
.pbtn {
  font-size: var(--sc-t-sm);
  padding: 0.42em 0.9em;
  border-radius: var(--sc-r-pill);
  border: 1px solid var(--sc-hairline-strong);
  background: transparent;
  color: var(--sc-ink);
  cursor: pointer;
  transition: background 140ms var(--sc-ease-out), color 140ms var(--sc-ease-out), transform 110ms var(--sc-ease-out);
}
.pbtn:active { transform: translateY(1px); }
@media (hover: hover) and (pointer: fine) {
  .pbtn:hover { background: color-mix(in srgb, var(--sc-ink) 10%, transparent); }
}
.pbtn[aria-pressed="true"] {
  background: var(--sc-accent);
  color: var(--sc-accent-ink);
  border-color: transparent;
}
.picker__desc {
  margin: var(--sc-3) 0 0;
  min-height: 2.9em;
  font-size: var(--sc-t-sm);
  line-height: 1.5;
  color: var(--sc-ink-soft);
  max-width: 52ch;
  text-wrap: pretty;
}
html:not(.sc-js) .picker { display: none; }

.foot {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--sc-3) var(--sc-6);
  width: 100%;
  max-width: var(--sc-maxw);
  margin-inline: auto;
  padding: var(--sc-5) var(--sc-gutter) calc(var(--sc-5) + env(safe-area-inset-bottom, 0px));
  border-top: 1px solid var(--sc-hairline);
  font-size: var(--sc-t-sm);
  color: var(--sc-ink-soft);
}
.foot p { margin: 0; }
.foot nav { display: flex; gap: var(--sc-5); }
.foot a { color: var(--sc-ink); }

/* ================================================ static floor (shared) ==
   Applies whenever motion mode is off: prefers-reduced-motion, or no JS.
   The scroll-driven stage falls back to plain stacked figures with captions;
   every argument stays readable, every image stays visible. */

html:not(.sc-motion) .projector .stage {
  position: static;
  height: auto;
  overflow: visible;
  display: flex;
  flex-direction: column;
  gap: var(--sc-9);
  max-width: min(64rem, 100%);
  margin-inline: auto;
  padding: var(--sc-section) var(--sc-gutter);
  background: transparent;
}
html:not(.sc-motion) .copy-hero {
  position: static;
  order: -1;
  opacity: 1 !important;
  transform: none !important;
  max-width: var(--sc-measure);
}
html:not(.sc-motion) .scrim-hero,
html:not(.sc-motion) .chips { display: none; }
html:not(.sc-motion) .projector .frames {
  display: flex;
  flex-direction: column;
  gap: var(--sc-9);
}
html:not(.sc-motion) .projector .frame { margin: 0; }
html:not(.sc-motion) .kb img {
  width: 100%; height: auto;
  border-radius: var(--sc-r-md);
}
html:not(.sc-motion) .rcap {
  display: block;
  margin-top: var(--sc-3);
  font-size: var(--sc-t-sm);
  color: var(--sc-ink-soft);
  max-width: var(--sc-measure);
}

/* no-JS only: the engine never runs, so open everything it would have driven */
html:not(.sc-js) [data-sc-cue] { opacity: 1 !important; }
html:not(.sc-js) [data-sc-in],
html:not(.sc-js) [data-sc-stagger] > * { opacity: 1; transform: none; }
html:not(.sc-js) [data-sc-reveal] { clip-path: none !important; }
html:not(.sc-js) .stage { position: static; height: auto; overflow: visible; }
html:not(.sc-js) .stage--pan { overflow-x: auto; }
html:not(.sc-js) .rail { width: max-content; }
html:not(.sc-js) [data-sc-progress] { display: none; }

/* Below 860px the hero copy spans the full width, so a corner gradient
   darkens the one corner it no longer occupies. Use a top band instead. */
@media (max-width: 860px) {
  .scrim-hero {
    background: linear-gradient(to bottom,
      color-mix(in oklab, var(--sc-canvas) 94%, transparent) 0%,
      color-mix(in oklab, var(--sc-canvas) 80%, transparent) 40%,
      color-mix(in oklab, var(--sc-canvas) 40%, transparent) 58%,
      transparent 74%);
  }
}

/* ---------------------------------------------------------------- mobile -- */
@media (max-width: 700px) {
  .copy-hero .sc-display--lg { font-size: var(--sc-t-2xl); }
  .sc-motion .copy-hero { top: clamp(3rem, 9vh, 5rem); }
  .hud { right: auto; left: 1rem; bottom: calc(1rem + env(safe-area-inset-bottom, 0px)); }
  .chips { bottom: clamp(4.2rem, 12vh, 7rem); }
  .rail__lead { width: 76vw; }
  .mode { width: 84vw; }
  .fact { grid-template-columns: 1fr; gap: var(--sc-2); }

  /* the close has to fit one phone screen: compact everything */
  .close { grid-template-columns: 1fr; gap: var(--sc-5); align-content: center; }
  .close__heading { font-size: var(--sc-t-xl); }
  .close__version { margin-top: var(--sc-3); font-size: var(--sc-t-sm); }
  .close__cta { margin-top: var(--sc-4); }
  .btn--big { font-size: var(--sc-t-base); }
  .gatekeeper { margin-top: var(--sc-4); }
  .gatekeeper p { font-size: var(--sc-t-xs); }
  .picker__stage { aspect-ratio: 21 / 9; }
  .picker__desc { min-height: 0; font-size: var(--sc-t-xs); }
  .picker__buttons { margin-top: var(--sc-3); }
  .pbtn { font-size: var(--sc-t-xs); }
  .foot { font-size: var(--sc-t-xs); padding-block: var(--sc-3); }

  /* safety net: if a short phone still cannot fit it, scroll inside the stage
     rather than clipping the footer away */
  .stage--close { overflow-y: auto; }
}