/* Hallmark · macrostructure: bespoke (painted diorama on a rail) · tone: quiet, hand-made, luminous · anchor hue: dusk violet 292
 * nav: wordmark + one text CTA + centred time-of-day wayfinder · footer: statement close under the finished painting
 */
/* Timeline, in screens. Must match js/src/timeline.js. */
:root {
  --vh: 1vh;                 /* JS writes a stable px value (ignores mobile URL-bar jitter) */
  --hero: 0.9;
  --glide: 6;
  --close: 1.8;
  --band: 0.3;               /* where a beat sits on screen when its stretch is centred */
}
@media (max-width: 720px) { :root { --band: 0.25; } }

*, *::before, *::after { box-sizing: border-box; }
html, body { overflow-x: clip; }
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; scroll-behavior: auto; }
body {
  margin: 0;
  background-color: var(--color-paper);
  background-image: url("../assets/paper.webp");
  background-size: 1024px auto;
  background-attachment: fixed;
  color: var(--color-ink);
  font-family: var(--font-display);
  font-optical-sizing: auto;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; }
::selection { background: var(--color-accent); color: var(--color-paper); }
:focus-visible { outline: 2px solid var(--color-focus); outline-offset: 3px; border-radius: 2px; }

.skip {
  position: fixed; left: var(--space-4); top: var(--space-4); z-index: 30;
  padding: var(--space-2) var(--space-4); background: var(--color-ink); color: var(--color-paper);
  font: 500 var(--text-sm) / 1 var(--font-ui); text-decoration: none; border-radius: var(--radius-pill);
  transform: translateY(-200%);
}
.skip:focus-visible { transform: none; }

/* ---------- chrome ---------- */
.bar {
  position: fixed; inset: 0 0 auto 0; z-index: 20;
  display: flex; align-items: baseline; justify-content: space-between; gap: var(--space-4);
  padding: clamp(1rem, 0.7rem + 1vw, 1.75rem) var(--gutter);
  pointer-events: none;
}
.bar a { pointer-events: auto; }
.bar__mark {
  font: 500 clamp(1.15rem, 1rem + 0.4vw, 1.4rem) / 1 var(--font-display);
  letter-spacing: -0.01em; text-decoration: none; color: var(--color-ink);
  white-space: nowrap;
}
.bar__cta, .link {
  font: 500 var(--text-sm) / 1.2 var(--font-ui); color: var(--color-ink); text-decoration: none;
  white-space: nowrap; padding-block: var(--space-2);
  background: linear-gradient(currentColor, currentColor) 0 100% / 100% var(--rule-hair) no-repeat;
  transition: color var(--dur-micro) var(--ease-out), background-size var(--dur-short) var(--ease-out);
}
.bar__cta:hover, .link:hover { color: var(--color-accent); background-size: 100% 2px; }
.bar__cta:active, .link:active { transform: translateY(1px); }

.wayfinder {
  position: fixed; z-index: 19; left: 50%; top: clamp(1.15rem, 0.85rem + 1vw, 1.9rem);
  width: min(22rem, 34vw); margin-left: calc(min(22rem, 34vw) / -2);
  pointer-events: none; text-align: center;
  opacity: 0; transition: opacity var(--dur-long) var(--ease-out);
}
.wayfinder.is-on { opacity: 1; }
.wayfinder__place { margin: 0 0 var(--space-2); font: 400 var(--text-sm) / 1.2 var(--font-ui); color: var(--color-muted); white-space: nowrap; }
.wayfinder__name { font: 500 var(--text-md) / 1 var(--font-display); color: var(--color-ink); margin-right: var(--space-1); }
.wayfinder__rail { position: relative; height: var(--rule-hair); background: var(--color-rule); }
.wayfinder__sun {
  position: absolute; top: -4px; left: 0; width: 9px; height: 9px; margin-left: -4.5px; border-radius: 50%;
  background: var(--color-sun-dawn); box-shadow: 0 0 0 3px var(--color-paper);
  transform: translateX(calc(var(--q, 0) * min(22rem, 34vw)));
}

/* ---------- the world ---------- */
.world {
  position: fixed; inset: 0; width: 100%; height: 100%; z-index: 1; display: block;
  opacity: 0; transition: opacity 600ms var(--ease-out);
}
.world.is-ready { opacity: 1; }

/* ---------- the words ---------- */
.track { position: relative; z-index: 5; }
.gl .track { height: calc((var(--hero) + var(--glide) + var(--close) + 1) * var(--vh) * 100 + var(--extra, 0px)); }

.beat { padding-inline: var(--gutter); }
.gl .beat {
  position: absolute; left: 0; width: min(36rem, 46vw);
  top: calc((var(--hero) + var(--glide) * (var(--k) - 0.5) / 5 + var(--band)) * var(--vh) * 100);
  transform: translateY(-50%);
}
.gl .beat[data-beat="1"] { --k: 1; }
.gl .beat[data-beat="2"] { --k: 2; }
.gl .beat[data-beat="3"] { --k: 3; }
.gl .beat[data-beat="4"] { --k: 4; }
.gl .beat[data-beat="5"] { --k: 5; }

.beat__text {
  margin: 0; max-width: 23ch;
  font: 300 var(--text-beat) / 1.24 var(--font-display);
  letter-spacing: -0.012em; text-wrap: pretty;
}
.gl .beat--hero { position: absolute; left: 0; top: calc(var(--vh) * 100 * 0.2); width: min(60rem, 92vw); transform: none; }
.hero__title {
  margin: 0; max-width: 12ch;
  font: 300 var(--text-hero) / 1.02 var(--font-display); letter-spacing: -0.03em;
  overflow-wrap: anywhere; min-width: 0;
}
.hero__sub { margin: var(--space-5) 0 0; font: 400 var(--text-md) / 1.4 var(--font-ui); color: var(--color-muted); max-width: 32ch; }

/* line-by-line ink dissolve: JS writes --e (0 crisp .. 1 gone) per line */
.ln {
  display: block; --e: 0; white-space: nowrap;
  opacity: calc(1 - var(--e));
  filter: blur(calc(var(--e) * 7px));
  text-shadow: 0 0 calc(var(--e) * 14px) var(--color-ink-soft), 0 0 18px var(--color-halo);
}
.ln.is-crisp { filter: none; }

/* ---------- the close ---------- */
.gl .close {
  position: absolute; left: 0; right: 0;
  top: calc((var(--hero) + var(--glide) + var(--close)) * var(--vh) * 100);
  min-height: calc(var(--vh) * 100 + var(--extra, 0px));
}
.close__body {
  padding-inline: var(--gutter);
  display: grid; grid-template-columns: minmax(0, 1fr); justify-items: center; text-align: center;
}
.gl .close__body {
  /* sits under the painting the canvas draws: top 13vh, width min(76vw, 74rem), aspect 6336/2688 */
  padding-top: calc(var(--vh) * 13 + min(76vw, 74rem) * 0.4242 + var(--space-7));
}
.close__title { margin: 0; max-width: 18ch; font: 300 var(--text-close) / 1.05 var(--font-display); letter-spacing: -0.025em; text-wrap: balance; overflow-wrap: anywhere; min-width: 0; }
.close__lede { margin: var(--space-4) 0 0; max-width: 38ch; font: 400 var(--text-md) / 1.5 var(--font-ui); color: var(--color-ink-soft); }
.close__actions { margin-top: var(--space-6); display: flex; flex-wrap: wrap; align-items: center; justify-content: center; gap: var(--space-5) var(--space-6); }
.btn {
  display: inline-flex; align-items: center; min-height: 48px; padding: 0 var(--space-6);
  font: 500 var(--text-md) / 1 var(--font-ui); white-space: nowrap; text-decoration: none;
  color: var(--color-paper); background: var(--color-ink); border-radius: var(--radius-pill);
  transition: background-color var(--dur-micro) var(--ease-out), transform var(--dur-micro) var(--ease-out);
}
.btn:hover { background: var(--color-accent); transform: translateY(-1px); }
.btn:active { background: var(--color-accent-2); transform: translateY(0); }
.close__sign { margin: var(--space-7) 0 0; font: 500 var(--text-md) / 1.3 var(--font-display); }
.close__colophon { margin: var(--space-2) 0 var(--space-6); max-width: 52ch; font: 400 var(--text-xs) / 1.5 var(--font-ui); color: var(--color-muted); }

/* ---------- still edition (reduced motion, no WebGL, ?nogl): a designed still film ---------- */
.still-art { display: none; margin: 0; }
.still .world, .still .wayfinder { display: none; }
.still .still-art { display: block; }
.still .still-art img, .still .beat:not(.beat--hero)::after {
  -webkit-mask-image: radial-gradient(ellipse 50% 50% at 50% 50%, var(--mask-on) 62%, var(--mask-off) 100%);
  mask-image: radial-gradient(ellipse 50% 50% at 50% 50%, var(--mask-on) 62%, var(--mask-off) 100%);
}
.still .track { padding-top: calc(var(--space-8) * 1.6); }
.still .beat { max-width: 78rem; margin-inline: auto; padding-block: var(--space-6); }
.still .beat--hero { padding-bottom: var(--space-5); }
.still .still-art--hero { margin: var(--space-6) calc(var(--gutter) * -0.5) 0; }
.still .beat:not(.beat--hero) {
  display: grid; grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr); gap: var(--space-7); align-items: center;
}
.still .beat:not(.beat--hero)::after {
  content: ""; aspect-ratio: 4 / 3;
  background: url("../assets/master-m.webp") var(--u) var(--v) / auto 250% no-repeat;
}
.still .beat[data-beat="1"] { --u: 14%; --v: 42%; }
.still .beat[data-beat="2"] { --u: 40%; --v: 72%; }
.still .beat[data-beat="3"] { --u: 56%; --v: 54%; }
.still .beat[data-beat="4"] { --u: 73%; --v: 62%; }
.still .beat[data-beat="5"] { --u: 96%; --v: 50%; }
.still .still-art--close { max-width: 64rem; margin: var(--space-7) auto; }
.still .close { padding-bottom: var(--space-8); }

/* ---------- phones ---------- */
@media (max-width: 720px) {
  .gl .beat { width: 100%; }
  .beat__text { max-width: 22ch; }
  .gl .beat--hero { top: calc(var(--vh) * 100 * 0.15); }
  .wayfinder { left: var(--gutter); margin-left: 0; width: 9.5rem; top: 3.6rem; text-align: left; }
  .wayfinder__sun { transform: translateX(calc(var(--q, 0) * 9.5rem)); }
  .wayfinder__place { font-size: var(--text-xs); }
  .wayfinder__name { font-size: var(--text-sm); }
  .gl .close__body { padding-top: calc(var(--vh) * 16 + 90vw * 0.4242 + var(--space-6)); }
  .close__lede { font-size: var(--text-sm); }
  .still .beat:not(.beat--hero) { grid-template-columns: minmax(0, 1fr); gap: var(--space-4); }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition-duration: 150ms !important; animation-duration: 150ms !important; }
}