/* B166ER — home page: the scroll story. */

/* ------------------------------------------------------------------ story */
.story { position: relative; z-index: 2; }
.sticky { position: relative; }
.panel { position: relative; min-height: 100vh; }
html.js .sticky { position: sticky; top: 0; height: 100vh; height: 100svh; overflow: hidden; }
html.js .panel { position: absolute; inset: 0; min-height: 0; opacity: 0; pointer-events: none; will-change: opacity, transform; }
html.js .panel.live { pointer-events: auto; }
.pi { position: absolute; inset: 0; padding: 128px var(--gutter) 112px; max-width: calc(var(--wrap) + var(--gutter) * 2); margin: 0 auto; }
html:not(.js) .pi { position: relative; min-height: 100vh; }

.tagline { font-family: var(--display); font-weight: 500; font-size: clamp(30px, 3.3vw, 54px); letter-spacing: -.02em; line-height: 1.02; color: var(--fg); text-wrap: balance; }
.tagline em { font-style: normal; color: color-mix(in oklab, var(--c) 72%, #fff); }
.plink { display: inline-flex; align-items: center; gap: 10px; font-size: 12px; font-weight: 500; letter-spacing: .16em; text-transform: uppercase; color: var(--fg); }
.plink .u { background: linear-gradient(var(--c), var(--c)) 0 100% / 100% 1px no-repeat; padding-bottom: 5px; transition: background-size .45s var(--ease); }
.plink:hover .u { background-size: 0 1px; background-position: 100% 100%; }
.plink .arrow { color: var(--c); width: 12px; height: 12px; margin-top: -5px; }
.plink:hover .arrow { transform: translate(2px, -2px); }
.stack { display: grid; gap: 22px; justify-items: start; }

/* 0 · intro */
.hero .stack { position: absolute; left: var(--gutter); bottom: 112px; max-width: 760px; }
.hero h1 { font-size: clamp(34px, 3.4vw, 56px); }

/* 1 · arena: shape centre stage, words on the floor in front of it */
.arena .stack { position: absolute; left: 50%; bottom: 112px; transform: translateX(-50%); justify-items: center; text-align: center; width: min(760px, 90%); }
.arena .kick { justify-content: center; }

/* 2 · mirror */
.mirror .stack { position: absolute; right: var(--gutter); top: 50%; transform: translateY(-50%); width: min(500px, 40vw); }

/* 3 · annotated */
.annot .stack { position: absolute; left: var(--gutter); top: 128px; width: min(440px, 34vw); }
.annot .bl { position: absolute; left: var(--gutter); bottom: 112px; }
.notes { position: absolute; left: 50%; top: 52%; width: 0; height: 0; }
.note { position: absolute; display: flex; align-items: center; gap: 12px; width: max-content; white-space: nowrap; transform: translateY(-50%); top: calc(var(--rs) * var(--y)); }
.note.nr { left: calc(var(--rs) * var(--x)); }
.note.nl { right: calc(var(--rs) * var(--x)); flex-direction: row-reverse; text-align: right; }
.note i { display: block; width: 64px; height: 1px; background: color-mix(in oklab, var(--c) 60%, transparent); transform: scaleX(0); transition: transform .8s var(--ease-out) var(--d); }
.note.nr i { transform-origin: left; }
.note.nl i { transform-origin: right; }
.note b { width: 5px; height: 5px; border-radius: 50%; background: var(--c); box-shadow: 0 0 10px var(--c); flex: none; opacity: 0; transition: opacity .4s var(--d); }
.note span { display: grid; gap: 2px; opacity: 0; transform: translateX(-6px); transition: opacity .6s var(--ease) calc(var(--d) + .25s), transform .8s var(--ease-out) calc(var(--d) + .25s); }
.note.nl span { transform: translateX(6px); }
.note small { font-size: 10.5px; font-weight: 500; letter-spacing: .16em; text-transform: uppercase; color: var(--fg3); }
.note strong { font-family: var(--display); font-size: 19px; font-weight: 500; letter-spacing: -.01em; color: var(--fg); font-variant-numeric: tabular-nums; }
.panel.live .note i { transform: scaleX(1); }
.panel.live .note b { opacity: 1; }
.panel.live .note span { opacity: 1; transform: none; }

/* 4 · giant */
.giant .stack { position: absolute; left: var(--gutter); bottom: 112px; width: min(520px, 42vw); }

/* 5 · index */
.index .row { position: absolute; left: var(--gutter); right: var(--gutter); bottom: 112px; display: grid; grid-template-columns: 1fr 1.4fr auto; gap: 48px; padding-top: 28px; border-top: 1px solid var(--line2); align-items: start; }

/* hero orbit labels */
.labels { position: absolute; inset: 0; pointer-events: none; }
.nlabel {
  position: absolute; left: 0; top: 0; display: inline-flex; align-items: center; gap: 9px; padding: 6px 8px;
  font-size: 11px; font-weight: 500; letter-spacing: .14em; text-transform: uppercase; color: var(--fg);
  text-shadow: 0 0 18px rgba(11, 11, 29, .95), 0 0 4px rgba(11, 11, 29, .9); white-space: nowrap; opacity: 0;
}
.nlabel i { width: 5px; height: 5px; border-radius: 50%; background: var(--c); box-shadow: 0 0 10px var(--c); }

/* chapter index along the floor */
.rail { position: absolute; left: 50%; bottom: 32px; transform: translateX(-50%); display: flex; gap: 4px; }
.rail button { position: relative; display: flex; align-items: baseline; gap: 8px; padding: 8px 12px; font-size: 11px; font-weight: 500; letter-spacing: .14em; text-transform: uppercase; color: var(--fg3); transition: color .4s var(--ease); }
.rail button span { font-variant-numeric: tabular-nums; color: var(--dim); }
.rail button::after { content: ''; position: absolute; left: 12px; right: 12px; bottom: 2px; height: 1px; background: var(--c); transform: scaleX(0); transform-origin: left; transition: transform .6s var(--ease-out); }
.rail button:hover { color: var(--fg2); }
.rail button.on { color: var(--fg); }
.rail button.on::after { transform: scaleX(1); }
.mdots { display: none; }

@media (max-width: 900px) {
  .rail { display: none; }
  .mdots { position: absolute; top: 76px; left: var(--gutter); right: var(--gutter); display: flex; gap: 6px; }
  .mdots span { flex: 1; height: 2px; border-radius: 2px; background: rgba(238, 238, 251, .14); overflow: hidden; }
  .mdots span i { display: block; height: 100%; width: 100%; background: var(--c, #fff); transform-origin: left; transform: scaleX(0); }
  .pi { display: flex; flex-direction: column; justify-content: flex-end; align-items: flex-start; gap: 18px; padding: 0 var(--gutter) calc(env(safe-area-inset-bottom) + 36px); }
  .panel::before { content: ''; position: absolute; inset: 0; pointer-events: none; background: linear-gradient(0deg, rgba(11, 11, 29, .94) 0%, rgba(11, 11, 29, .7) 30%, rgba(11, 11, 29, 0) 52%); }
  .hero .stack, .arena .stack, .mirror .stack, .annot .stack, .annot .bl, .giant .stack, .index .row { position: static; transform: none; width: 100%; max-width: none; text-align: left; justify-items: start; display: grid; gap: 18px; padding: 0; border: 0; }
  .arena .kick { justify-content: flex-start; }
  .index .row { grid-template-columns: 1fr; }
  .notes { display: none; }
  .tagline { font-size: clamp(30px, 8.6vw, 40px); }
  .hero h1 { font-size: clamp(30px, 8.6vw, 40px); }
  .labels { display: none; }
}