/* ============================================================
   MarkedExiled — intro sequence
   ============================================================ */

:root {
  --bg: #000000;
  --fg: #ffffff;

  /* sizing */
  --logo-size: clamp(58px, 15vw, 180px);
  --brand-size: clamp(1.9rem, 9.4vw, 5.4rem);
  --row-gap: clamp(14px, 2.4vw, 38px);

  /* easings */
  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-out-quint: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-in-out-cubic: cubic-bezier(0.65, 0, 0.35, 1);
  --ease-in-out-quart: cubic-bezier(0.76, 0, 0.24, 1);

  /* timings (set from js/intro.js) */
  --t-slide: 880ms;
  --t-letter: 720ms;
  --t-wipe: 1000ms;
}

* { box-sizing: border-box; }

html, body {
  height: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  -webkit-font-smoothing: antialiased;
  overflow: hidden;
}

body[data-intro="done"] {
  overflow: auto;
}

.mark-defs {
  position: absolute;
  width: 0;
  height: 0;
  overflow: hidden;
}

.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  margin: -1px; padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
}

/* ---------- stage ---------- */

.intro {
  position: fixed;
  inset: 0;
  background: var(--bg);
  display: grid;
  place-items: center;
  overflow: hidden;
  z-index: 100;
  /* Comfortably clear of the viewport corners (which sit at ~70.7%), so
     nothing is clipped until the wipe actually runs. */
  clip-path: circle(80% at 50% 50%);
}

/* The same circle that takes the lockup away also lifts this whole layer
   off the page underneath it. */
.intro[data-state="wipe"],
.intro[data-state="done"] {
  clip-path: circle(0% at 50% -30%);
  transition: clip-path var(--t-wipe) var(--ease-in-out-quart);
}

/* Once it has closed there is nothing left to show. */
.intro[data-state="done"] {
  display: none;
}

/* ---------- zoom layer ---------- */
/* Full-bleed. Its viewBox is driven frame by frame in JS, so the mark stays
   vector-sharp from "fills the screen" all the way down to the lockup. */

.intro__zoom {
  position: absolute;
  inset: 0;
  display: none;
  width: 100%;
  height: 100%;
  color: var(--fg);
}

.intro[data-state="idle"] .intro__zoom,
.intro[data-state="zoom"] .intro__zoom {
  display: block;
}

/* The element the circle mask is applied to. It spans the whole
   viewport so the circle's radius is measured against the screen,
   not against the width of the lockup. */
.intro__stage {
  position: absolute;
  inset: 0;
  display: grid;
  /* pack the rows together in the middle - place-items would stretch the
     lockup and the mobile note to opposite ends of the screen */
  place-content: center;
  justify-items: center;
  /* Big enough to clear the lockup, small enough that the shrink
     starts cutting almost immediately. The stage is transparent, so
     clipping the empty corners is invisible. */
  clip-path: circle(50% at 50% 50%);
  will-change: clip-path, transform;
}

.intro__row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--row-gap);
  /* Offset set by JS so the logo alone reads as centred. */
  transform: translate3d(var(--row-shift, 0px), 0, 0);
  will-change: transform;
}

/* ---------- logo ---------- */

.intro__logo {
  flex: none;
  line-height: 0;
  /* Hidden until the zoom layer lands exactly on this slot. */
  opacity: 0;
}

.logo {
  display: block;
  width: var(--logo-size);
  height: var(--logo-size);
  color: var(--fg);
}

/* ---------- brand text ---------- */

.intro__brand {
  flex: none;
  margin: 0;
  font-size: var(--brand-size);
  font-weight: 800;
  letter-spacing: -0.025em;
  line-height: 1;
  white-space: nowrap;
  user-select: none;
}

.brand__letters {
  display: block;
}

/* One mask per glyph — the inner span rises up through it. */
.brand__ch {
  display: inline-block;
  overflow: hidden;
  /* room for ascenders/descenders so the mask doesn't shave glyphs */
  padding: 0.1em 0 0.16em;
  margin: -0.1em 0 -0.16em;
  vertical-align: top;
}

.brand__ch--space {
  width: 0.28em;
}

.brand__in {
  display: inline-block;
  transform: translate3d(0, 115%, 0);
  will-change: transform;
}

/* ============================================================
   Timeline states — each step is driven by data-state on .intro
   ============================================================ */

/* 1 — the zoom layer has arrived: swap it for the real logo. No fade —
   the two are pixel-identical at this instant, so the cut is invisible. */
.intro[data-state="logo"] .intro__logo,
.intro[data-state="slide"] .intro__logo,
.intro[data-state="letters"] .intro__logo,
.intro[data-state="wipe"] .intro__logo,
.intro[data-state="done"] .intro__logo {
  opacity: 1;
}

/* 2 — row slides left so logo + text end up centred together */
.intro[data-state="slide"] .intro__row,
.intro[data-state="letters"] .intro__row,
.intro[data-state="wipe"] .intro__row,
.intro[data-state="done"] .intro__row {
  transform: translate3d(0, 0, 0);
  transition: transform var(--t-slide) var(--ease-in-out-cubic);
}

/* 3 — letters rise, bottom to top, staggered (delay set inline by JS) */
.intro[data-state="letters"] .brand__in,
.intro[data-state="wipe"] .brand__in,
.intro[data-state="done"] .brand__in {
  transform: translate3d(0, 0, 0);
  transition: transform var(--t-letter) var(--ease-out-expo);
  transition-delay: var(--d, 0ms);
}

/* 4 — circle mask closes upward and carries everything out of frame */
.intro[data-state="wipe"] .intro__stage,
.intro[data-state="done"] .intro__stage {
  clip-path: circle(0% at 50% -30%);
  transform: translate3d(0, -26vh, 0) scale(0.94);
  transition:
    clip-path var(--t-wipe) var(--ease-in-out-quart),
    transform var(--t-wipe) var(--ease-in-out-quart);
}

.intro[data-state="done"] {
  pointer-events: none;
}

/* ---------- reduced motion: show the end frame, skip the theatre ---------- */

@media (prefers-reduced-motion: reduce) {
  .intro__logo,
  .intro__row,
  .brand__in,
  .intro__stage {
    transition: none !important;
  }
  .intro[data-state="idle"] .intro__logo { opacity: 1; }
  .intro[data-state="idle"] .intro__row  { transform: none; }
  .intro[data-state="idle"] .brand__in   { transform: none; }
}

/* ---------- mobile note under the lockup ---------- */

.intro__note {
  display: none;
  margin-top: clamp(18px, 3.4vh, 30px);
  text-align: center;
}

.intro__note-line {
  display: block;
  overflow: hidden;
  padding: 0.12em 0 0.18em;
  margin: -0.12em 0 -0.18em;
}

.intro__note-line i {
  display: inline-block;
  font-style: normal;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--fg);
  transform: translate3d(0, 115%, 0);
  will-change: transform;
}

.intro__note-line--sub i {
  margin-top: 5px;
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: rgba(255, 255, 255, 0.42);
}

.intro[data-state="letters"] .intro__note-line i,
.intro[data-state="wipe"] .intro__note-line i,
.intro[data-state="done"] .intro__note-line i {
  transform: translate3d(0, 0, 0);
  transition: transform var(--t-letter) var(--ease-out-expo);
  transition-delay: 620ms;
}

.intro[data-state="letters"] .intro__note-line--sub i,
.intro[data-state="wipe"] .intro__note-line--sub i,
.intro[data-state="done"] .intro__note-line--sub i {
  transition-delay: 760ms;
}

@media (max-width: 620px) {
  .intro__note { display: block; }
}

@media (prefers-reduced-motion: reduce) {
  .intro__note-line i { transform: none; transition: none; }
}