/* ============================================================
   Object Fingerprint — logo, page-load intro, form loader
   ============================================================ */

:root {
  --fp-bg:   oklch(0.10 0.012 240);
  --fp-ink:  oklch(0.97 0.005 80);
  --fp-dim:  oklch(0.55 0.012 240);
  --fp-line: oklch(0.30 0.014 240);

  --fp-base: oklch(0.29 0.022 240);        /* ridge not yet scanned */
  --fp-lit:  oklch(0.82 0.16 200);         /* scanned (site accent) */
  --fp-hot:  oklch(0.97 0.05 200);         /* scan beam + flash */
  --fp-glow: oklch(0.82 0.16 200 / 0.55);  /* halo */

  --fp-err:      oklch(0.74 0.16 18);      /* failure (site rose) */
  --fp-err-hot:  oklch(0.96 0.04 18);
  --fp-err-glow: oklch(0.74 0.16 18 / 0.55);
}

.fp-logo,
.fp-mark {
  display: block;
  width: 100%;
  height: 100%;
  overflow: visible;
}
.fp-mark { filter: drop-shadow(0 0 5px var(--fp-glow)); }

/* the large logos repaint every frame: keep them on their own compositor
   layer so the rest of the page is not repainted with them */
.fp-intro__logo,
.fp-loader__logo { will-change: transform; }
.fp-mark[data-type="err"] { filter: drop-shadow(0 0 5px var(--fp-err-glow)); }

/* logo slot in the nav brand */
.brand-logo {
  display: inline-block;
  flex: none;
  height: 34px;
  aspect-ratio: 894 / 1130;
}
.brand-logo > img { display: block; width: 100%; height: 100%; }

/* ---------- page-load intro ---------- */
.fp-intro { display: none; }

.fp-intro-on body { overflow: hidden; }

.fp-intro-on .fp-intro {
  display: block;
  position: fixed;
  inset: 0;
  z-index: 1000;
}

.fp-intro__bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(55% 45% at 50% 44%, oklch(0.17 0.035 215 / 0.9) 0%, transparent 70%),
    var(--fp-bg);
}

.fp-intro__stage {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: clamp(18px, 3.5vh, 34px);
  pointer-events: none;
}

.fp-intro__logo {
  height: min(46vh, calc(70vw * 1.264));
  aspect-ratio: 894 / 1130;
}

/* same face, weight and tracking as .brand-name, only larger —
   so the flight into the nav is a pure transform */
.fp-intro__word {
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-weight: 600;
  font-size: min(calc(13px * 2.2), 5.2vw);
  line-height: 1.2;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  white-space: nowrap;
  color: var(--fp-ink);
  opacity: 0;
}
.fp-intro__word.is-in { animation: fp-word-in 700ms cubic-bezier(.2, .6, .2, 1) forwards; }
.fp-intro__word.is-instant { opacity: 1; animation: none; }

@keyframes fp-word-in {
  from { opacity: 0; letter-spacing: 0.32em; filter: blur(6px); }
  to   { opacity: 1; letter-spacing: 0.12em; filter: blur(0); }
}

.fp-intro__skip {
  position: absolute;
  right: clamp(16px, 4vw, 40px);
  bottom: clamp(16px, 4vh, 36px);
  padding: 8px 14px;
  font: 500 11px/1 "JetBrains Mono", ui-monospace, monospace;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--fp-dim);
  background: transparent;
  border: 1px solid var(--fp-line);
  border-radius: 999px;
  cursor: pointer;
  opacity: 0;
  animation: fp-fade-in 400ms ease 900ms forwards;
  transition: color 180ms, border-color 180ms;
}
.fp-intro__skip:hover,
.fp-intro__skip:focus-visible { color: var(--fp-ink); border-color: var(--fp-lit); }

@keyframes fp-fade-in { to { opacity: 1; } }

/* ---------- loader over a form while it is sent ---------- */
.fp-loader-host { position: relative; }

.fp-loader {
  position: absolute;
  inset: 0;
  z-index: 20;
  display: grid;
  place-items: center;
  border-radius: inherit;
  background: oklch(0.10 0.012 240 / 0.55);
  backdrop-filter: blur(8px) saturate(120%);
  -webkit-backdrop-filter: blur(8px) saturate(120%);
  opacity: 0;
  transition: opacity 280ms ease;
}
.fp-loader.is-on { opacity: 1; }

.fp-loader__card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  padding: 20px;
  text-align: center;
}

.fp-loader__logo {
  height: min(120px, 26vh);
  aspect-ratio: 894 / 1130;
}

.fp-loader__mark {
  height: 36px;
  aspect-ratio: 120 / 96;
}

.fp-loader__msg {
  margin: 0;
  max-width: 32ch;
  min-height: 1.4em;
  font: 500 15px/1.4 "Space Grotesk", ui-sans-serif, system-ui, sans-serif;
  color: var(--fp-ink);
  opacity: 0;
  transition: opacity 300ms ease;
}
.fp-loader__msg.is-on { opacity: 1; }
.fp-loader.is-error .fp-loader__msg { color: var(--fp-err); }