/* Intro overlay. Hidden unless <html> has .intro-on (set before first paint by the inline
   head script). If intro.js never starts, the failsafe animation hides it after 3s. */

.intro,
.intro-skip {
  display: none;
}

.intro-on .intro {
  display: block;
  position: fixed;
  inset: 0;
  z-index: 1000;
  background: var(--ground);
  cursor: pointer;
  user-select: none;
  -webkit-user-select: none;
  touch-action: none;
  -webkit-tap-highlight-color: transparent;
  animation: intro-failsafe 0s 3s forwards;
}

.intro-on .intro-skip {
  display: inline-flex;
  animation: intro-failsafe 0s 3s forwards;
}

.intro.is-running,
.intro-skip.is-running {
  animation: none;
}

@keyframes intro-failsafe {
  to {
    visibility: hidden;
    pointer-events: none;
  }
}

/* ---- The name ------------------------------------------------------------- */
.intro-stage {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Letters stay hidden until intro.js has the font and starts animating them. */
.intro-stage.is-waiting .intro-letter {
  opacity: 0;
}

.intro-name {
  display: flex;
  gap: 0 0.3em;
  font-family: var(--font-display);
  font-size: min(8vw, 24vh);
  font-weight: 400;
  font-variation-settings: "opsz" 144;
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--text);
  white-space: nowrap;
}

.intro-word {
  display: flex;
}

.intro-letter {
  display: inline-block;
}

/* Narrow or tall screens: two lines. */
@media (max-width: 40rem), (max-aspect-ratio: 4/5) {
  .intro-name {
    flex-direction: column;
    align-items: center;
    gap: 0.04em;
    font-size: min(15.5vw, 14vh);
  }
}

/* ---- Hint and skip -------------------------------------------------------- */
.intro-hint {
  position: absolute;
  inset-inline: 0;
  bottom: max(var(--space-xl), env(safe-area-inset-bottom));
  text-align: center;
  font-size: var(--step--1);
  font-weight: 600;
  letter-spacing: var(--tracking-caps);
  text-transform: uppercase;
  color: var(--text-subtle);
  opacity: 0;
}

.intro-skip {
  position: fixed;
  top: var(--space-s);
  right: var(--gutter);
  z-index: 1001;
  align-items: center;
  min-height: 2.75rem;
  padding: 0 var(--space-s);
  background: transparent;
  color: var(--text-muted);
  border: 1px solid var(--color-border-control);
  border-radius: var(--radius-pill);
  font-size: var(--step--1);
  font-weight: 600;
  letter-spacing: 0.04em;
}

.intro-skip:hover {
  color: var(--text);
  border-color: var(--accent);
}

/* ---- Flip tiles ----------------------------------------------------------- */
.intro-tiles {
  position: absolute;
  inset: 0;
  visibility: hidden;
}

.intro.is-breaking {
  background: transparent;
  cursor: default;
}

.intro.is-breaking > .intro-stage,
.intro.is-breaking > .intro-hint {
  visibility: hidden;
}

.intro.is-breaking .intro-tiles {
  visibility: visible;
}

.intro-tile {
  position: absolute;
  perspective: 1400px;
}

.intro-card {
  position: absolute;
  inset: 0;
  transform-style: preserve-3d;
}

.intro-face {
  position: absolute;
  inset: -0.5px;
  overflow: hidden;
  background: var(--ground);
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
}

.intro-stage--slice {
  inset: auto;
}