/* ==========================================================================
   Brand preloader v2 (scoped: .vintro) — index.html only.
   Ivory screen, X-ray scan reveal of the hospital lockup, hairline split exit.
   site.css is never modified; the legacy .intro rules simply go unused.
   ========================================================================== */

.vintro {
  position: fixed;
  inset: 0;
  z-index: 180;
  background: transparent;
  overflow: hidden;
  display: grid;
  place-items: center;
  --vE: cubic-bezier(.16, 1, .3, 1);
  --vEE: cubic-bezier(.76, 0, .24, 1);
}
.vintro.is-done { pointer-events: none; }

/* the two ivory panes that cover the page and part at the end */
.vintro__pane {
  position: absolute;
  left: 0; right: 0;
  height: 50.4%;
  background: var(--ivory);
  z-index: 1;
  will-change: transform;
  transition: transform 1.02s var(--vEE) .18s;
}
.vintro__pane--t { top: 0; }
.vintro__pane--b { bottom: 0; }

/* soft vignette + faint film grain so the ivory is not flat */
.vintro__pane--t::after,
.vintro__pane--b::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(120% 90% at 50% 50%, rgba(244, 241, 234, 0) 40%, rgba(22, 22, 26, .07) 100%);
  pointer-events: none;
}

/* hairline the panes split along */
.vintro__split {
  position: absolute;
  left: 50%; top: 50%;
  width: 0; height: 1px;
  background: var(--ink-12);
  transform: translate(-50%, -50%);
  z-index: 5;
  transition: width 1.15s var(--vE);
}
.vintro.is-line .vintro__split { width: calc(100% - 2 * var(--gutter)); }
.vintro.is-line .vintro__split::after {
  content: "";
  position: absolute;
  left: 50%; top: -1px;
  width: 34%; height: 3px;
  transform: translateX(-50%);
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: .5;
}

/* ---------- stage: logo lockup + kicker ---------- */
.vintro__stage {
  position: relative;
  z-index: 6;
  text-align: center;
  padding: 0 var(--gutter);
}
.vintro__mark {
  position: relative;
  width: min(70vw, 560px);
  margin: 0 auto;
}
.vintro__logo {
  display: block;
  width: 100%;
  height: auto;
  opacity: 0;
  transform: translateY(16px);
  clip-path: inset(0 0 100% 0);
  transition: clip-path 1.2s var(--vE), transform 1.2s var(--vE), opacity .45s linear;
  will-change: clip-path, transform;
}
.vintro.is-mark .vintro__logo { opacity: 1; transform: none; clip-path: inset(0 0 0 0); }

/* the X-ray scan bar that sweeps down the lockup as it is revealed */
.vintro__scan {
  position: absolute;
  left: -5%; right: -5%;
  top: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent) 16%, var(--accent) 84%, transparent);
  box-shadow: 0 0 18px rgba(163, 44, 36, .35);
  opacity: 0;
  pointer-events: none;
}
.vintro.is-mark .vintro__scan { animation: vintroScan 1.3s var(--vE) 1; }
@keyframes vintroScan {
  0%   { top: 0;    opacity: 0; }
  10%  { opacity: 1; }
  88%  { opacity: 1; }
  100% { top: 100%; opacity: 0; }
}

.vintro__kicker {
  margin-top: clamp(18px, 2.6vw, 32px);
  font-family: var(--mono);
  font-size: var(--fs-label);
  letter-spacing: .62em;
  text-transform: uppercase;
  color: var(--ink-40);
  opacity: 0;
  transform: translateY(10px);
  transition: opacity .85s var(--vE), transform .95s var(--vE), letter-spacing 1.3s var(--vE);
}
.vintro.is-kick .vintro__kicker { opacity: 1; transform: none; letter-spacing: .3em; }

/* ---------- progress hairline ---------- */
.vintro__bar {
  position: absolute;
  z-index: 6;
  left: var(--gutter);
  right: var(--gutter);
  bottom: clamp(52px, 7vh, 88px);
  height: 1px;
  background: var(--ink-12);
}
.vintro__bar i {
  display: block;
  height: 1px;
  width: 0;
  background: var(--accent);
  transition: width 1.6s cubic-bezier(.4, 0, .2, 1);
}

/* ---------- corner plates ---------- */
.vintro__m {
  position: absolute;
  z-index: 6;
  font-family: var(--mono);
  font-size: .62rem;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--ink-40);
  opacity: 0;
  transition: opacity .95s var(--vE);
  max-width: 42vw;
}
.vintro.is-meta .vintro__m { opacity: 1; }
.vintro__m--tl { top: clamp(20px, 3.4vh, 40px); left: var(--gutter); }
.vintro__m--tr { top: clamp(20px, 3.4vh, 40px); right: var(--gutter); text-align: right; }
.vintro__m--bl { bottom: clamp(22px, 3.4vh, 42px); left: var(--gutter); }
.vintro__m--br { bottom: clamp(22px, 3.4vh, 42px); right: var(--gutter); text-align: right; }
.vintro__m i { font-style: normal; color: var(--ink); }

/* ---------- exit ---------- */
.vintro.is-out .vintro__stage,
.vintro.is-out .vintro__bar,
.vintro.is-out .vintro__m { opacity: 0; transition: opacity .4s var(--vE); }
.vintro.is-out .vintro__split { opacity: 0; transition: opacity .3s linear .08s; }
.vintro.is-out .vintro__pane--t { transform: translateY(-100.6%); }
.vintro.is-out .vintro__pane--b { transform: translateY(100.6%); }

/* ---------- small screens ---------- */
@media (max-width: 860px) {
  .vintro__mark { width: min(82vw, 460px); }
  .vintro__kicker { letter-spacing: .34em; font-size: .6rem; }
  .vintro.is-kick .vintro__kicker { letter-spacing: .2em; }
  .vintro__m { font-size: .55rem; letter-spacing: .16em; max-width: 46vw; }
  .vintro__m--bl { display: none; }
  .vintro__bar { bottom: clamp(44px, 6vh, 64px); }
}
@media (max-width: 420px) {
  .vintro__m--tl { max-width: 52vw; }
}

@media (prefers-reduced-motion: reduce) {
  .vintro { display: none !important; }
}