/* /growth/ — scroll-scrubbed dandelion time-lapse story.
   Base rules = static layout (reduced motion / no GSAP). `html.gr-on` switches on the scroll story. */

.gr-story { background: var(--panel-bg); color: var(--panel-fg); position: relative; }
.gr-stage {
  /* Needs its own background: the sticky stage is its own blend group, so "screen" blends against this */
  position: relative; overflow: hidden; background: var(--panel-bg);
  display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr); align-items: center; gap: 2rem;
  padding: 12vh max(16px, (100vw - 1200px) / 2);
}
.gr-stage h1, .gr-stage h2 { color: var(--panel-fg); }
.gr-intro { grid-column: 1 / -1; text-align: center; }
.gr-intro h1 { font-size: clamp(2.6rem, 8vw, 6.5rem); line-height: 1; letter-spacing: -.03em; margin: 0; }
.gr-intro p { margin: .8rem 0 0; color: color-mix(in srgb, var(--panel-fg) 70%, transparent); }

.gr-steps { display: grid; gap: 2.5rem; }
.gr-step { display: grid; gap: .9rem; }
.gr-step h2 { font-size: clamp(2rem, 4.6vw, 3.8rem); line-height: 1; letter-spacing: -.03em; margin: 0; }
.gr-step p { margin: 0; max-width: 26rem; font-size: 1.15rem; color: color-mix(in srgb, var(--panel-fg) 70%, transparent); }
.gr-kicker { font: .75rem/1.4 var(--f-mono); text-transform: uppercase; letter-spacing: .1em; color: var(--green); }

.gr-bloom {
  justify-self: center; position: relative; z-index: 1; width: min(100%, 640px); aspect-ratio: 10 / 9;
  /* Footage is filmed on pure black; "screen" makes the black vanish into the panel colour */
  mix-blend-mode: screen;
  -webkit-mask-image: linear-gradient(#000 78%, transparent 99%);
          mask-image: linear-gradient(#000 78%, transparent 99%);
}
.gr-bloom canvas { display: none; width: 100%; height: 100%; }
.gr-still { display: block; width: 100%; height: 100%; }
.gr-cue, .gr-dots, .gr-load, .gr-seeds { display: none; }

.gr-end { text-align: center; }
.gr-end h2 { font-size: clamp(2.2rem, 6vw, 4.5rem); margin-top: 12px; }
.gr-end p { color: var(--ink-2); margin: 1rem 0 1.8rem; }
.gr-end .hero__cta { justify-content: center; }

@media (max-width: 800px) {
  .gr-stage { grid-template-columns: 1fr; }
  .gr-bloom { grid-row: 2; }
}

/* ---------- The scroll story ---------- */
.gr-on .gr-story { height: 700svh; }
.gr-on .gr-stage {
  --glow: 0;
  position: sticky; top: 0; height: 100svh; padding-block: 0; gap: 0;
}
/* Soft light behind the flower that brightens as it opens */
.gr-on .gr-stage::before {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background: radial-gradient(42vmax 38vmax at var(--gx, 70%) 50%, color-mix(in srgb, var(--green) 22%, transparent), transparent 70%);
  opacity: calc(.25 + .75 * var(--glow));
}
.gr-on .gr-intro { position: absolute; inset: 47svh 0 auto; z-index: 3; pointer-events: none; }

.gr-on .gr-bloom {
  width: min(100%, 84svh * 10 / 9); will-change: translate, scale;
  /* --k runs 1 → 0 as the story starts: small, top and centred → full size in its column */
  --k: 1; --grow: 1;
  --cx: calc(-23.8095vw + .47619 * max(16px, (100vw - 1200px) / 2));
  translate: calc(var(--cx) * var(--k)) calc(-30% * var(--k));
  scale: calc((1 - .55 * var(--k)) * var(--grow));
}
.gr-on .gr-bloom canvas { display: block; }
.gr-on .gr-still { display: none; }

.gr-on .gr-steps { position: relative; height: 16rem; z-index: 3; gap: 0; }
.gr-on .gr-step { position: absolute; inset: 0; align-content: center; opacity: 0; visibility: hidden; }

/* The stage starts a header-height down the page, so the cue is lifted by the same amount to stay on screen */
.gr-on .gr-cue {
  display: block; position: absolute; bottom: calc(3svh + var(--gr-off, 0px)); left: 50%; translate: -50% 0; z-index: 4; /* above .gr-steps' dark backdrop on phones */
  font: 500 clamp(1rem, 1.5vw, 1.25rem) var(--f-mono); text-transform: uppercase; letter-spacing: .14em; white-space: nowrap; color: var(--panel-fg);
}
.gr-on .gr-cue::after { content: ""; display: block; width: 2px; height: 44px; margin: 12px auto 0; background: currentColor; animation: gr-drip 1.8s ease-in-out infinite; transform-origin: top; }
@keyframes gr-drip { 0% { transform: scaleY(0); } 50% { transform: scaleY(1); } 100% { transform: scaleY(1); opacity: 0; } }

.gr-on .gr-load { display: block; position: absolute; right: 16px; bottom: 14px; z-index: 3; font: .7rem var(--f-mono); letter-spacing: .08em; color: color-mix(in srgb, var(--panel-fg) 60%, transparent); transition: opacity .6s; }

.gr-on .gr-dots { display: grid; position: absolute; left: 16px; top: 50%; translate: 0 -50%; gap: 12px; z-index: 3; }
.gr-dots i { width: 8px; height: 8px; border-radius: 50%; background: color-mix(in srgb, var(--panel-fg) 18%, transparent); transition: background .3s, transform .3s; }
.gr-dots i.on { background: var(--green); transform: scale(1.4); }

.gr-on .gr-seeds { display: block; position: absolute; inset: 0; pointer-events: none; z-index: 2; }
.gr-seed { position: absolute; left: 0; top: 0; width: 34px; height: 46px; opacity: 0; will-change: transform, opacity; }

@media (max-width: 800px) {
  .gr-on .gr-stage { grid-template-rows: 1fr auto; align-items: end; --gx: 50%; }
  .gr-on .gr-bloom { position: absolute; grid-row: auto; top: 8svh; left: 0; right: 0; margin: auto; width: 100%; --cx: 0px; }
  .gr-on .gr-steps { height: 13rem; margin-bottom: 4svh; background: linear-gradient(transparent, color-mix(in srgb, var(--panel-bg) 92%, transparent) 30%); }
  .gr-on .gr-step { align-content: end; padding-bottom: 1rem; }
  .gr-on .gr-dots { display: none; }
}