/* ==========================================================================
   Signature scroll-driven process animation
   Desktop: GSAP ScrollTrigger pins `.process-scroll` for ~450vh of scroll and
   scrubs opacity/transform on `.process-step` elements (see scroll-process.js).
   Mobile / reduced-motion: falls back to a stacked, non-pinned timeline that
   simply fades each step in as it enters the viewport.
   ========================================================================== */

.process-scroll {
  position: relative;
  height: 450vh;
  background: var(--paper-50);
  color: var(--text-on-light);
  /* Process section reads as a light (white) zone per the brand mock —
     redefine these tokens locally so every descendant rule below that
     references var(--text-on-dark-muted) / var(--color-border-dark)
     resolves to the light-mode value without rewriting each rule. */
  --text-on-dark: var(--text-on-light);
  --text-on-dark-muted: var(--text-on-light-muted);
  --color-border-dark: var(--color-border-light);
}

.process-scroll__sticky {
  /* Pinning is handled by GSAP ScrollTrigger (public/js/scroll-process.js),
     which applies position:fixed itself — keep this purely a layout box. */
  height: 100vh;
  overflow: hidden;
  display: flex;
  align-items: center;
}

.process-scroll__bg-number {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-family: var(--font-display);
  font-size: min(48vw, 46rem);
  font-weight: 700;
  color: rgba(243,196,24,0.05);
  line-height: 1;
  pointer-events: none;
  z-index: 0;
  user-select: none;
}

.process-scroll__head {
  position: absolute;
  top: 3.4rem;
  left: 0;
  right: 0;
  z-index: 3;
  text-align: center;
}

.process-scroll__counter {
  position: absolute;
  right: var(--container-pad);
  top: 50%;
  transform: translateY(-50%);
  z-index: 3;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.2rem;
  font-family: var(--font-body);
}
.process-scroll__counter .num {
  font-size: 1.6rem;
  font-family: var(--font-display);
  color: var(--color-accent);
}
.process-scroll__counter .of { font-size: 0.75rem; color: var(--text-on-dark-muted); }
.process-scroll__progress-track {
  width: 2px;
  height: 140px;
  background: var(--color-border-dark);
  border-radius: 2px;
  position: relative;
  overflow: hidden;
}
.process-scroll__progress-fill {
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 0%;
  background: linear-gradient(180deg, var(--gold-300), var(--gold-600));
  border-radius: 2px;
}

/* ---------- Numbered progress rail (1-2-3-4), left side ---------- */
.process-scroll__rail-nav {
  position: absolute;
  left: var(--container-pad);
  top: 50%;
  transform: translateY(-50%);
  z-index: 3;
  display: flex;
  flex-direction: column;
  gap: 1.4rem;
}
.process-rail-item {
  display: flex;
  align-items: center;
  gap: 0.9rem;
  opacity: 0.4;
  transition: opacity var(--dur-med) var(--ease-out);
}
.process-rail-item__num {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  border: 1px solid var(--color-border-dark);
  font-family: var(--font-display);
  font-size: 0.9rem;
  transition: border-color var(--dur-med) var(--ease-out), color var(--dur-med) var(--ease-out), background var(--dur-med) var(--ease-out);
}
.process-rail-item__label {
  font-size: 0.78rem;
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--text-on-dark-muted);
  max-width: 9ch;
  display: none;
}
.process-rail-item[data-active="true"] {
  opacity: 1;
}
.process-rail-item[data-active="true"] .process-rail-item__num {
  border-color: var(--gold-500);
  background: var(--gold-500);
  color: var(--ink-950);
}
.process-rail-item[data-active="true"] .process-rail-item__label {
  color: var(--text-on-light);
  font-weight: 600;
}
@media (min-width: 1180px) {
  .process-rail-item__label { display: block; }
  .process-scroll__steps { padding-left: 8rem; }
}
@media (max-width: 860px) {
  .process-scroll__rail-nav { display: none; }
}

.process-scroll__steps {
  position: relative;
  z-index: 2;
  width: 100%;
}

.process-step {
  position: absolute;
  inset: 0;
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  align-items: center;
  gap: var(--space-lg);
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-pad);
  opacity: 0;
  pointer-events: none;
}
.process-step[data-active="true"] { pointer-events: auto; }

.process-step__number {
  font-family: var(--font-display);
  font-size: clamp(6rem, 14vw, 11rem);
  font-weight: 700;
  line-height: 0.85;
  color: transparent;
  -webkit-text-stroke: 1.5px var(--gold-500);
  text-align: right;
}

.process-step__body { padding-left: 1rem; border-left: 1px solid var(--color-border-dark); }
.process-step__eyebrow { display: block; margin-bottom: 0.8rem; }
.process-step__title { font-family: var(--font-display); font-size: var(--fs-h3); margin-bottom: 1.2rem; }
.process-step__text { max-width: 34ch; color: var(--text-on-dark-muted); font-size: 1.02rem; }
.process-step__extra { margin-top: 1.6rem; font-size: 0.9rem; padding: 1rem 1.2rem; border-left: 2px solid var(--color-accent); background: rgba(243,196,24,0.06); color: var(--text-on-dark-muted); }

@media (max-width: 860px) {
  .process-step { grid-template-columns: 1fr; text-align: left; }
  .process-step__number { text-align: left; }
  .process-scroll__counter { display: none; }
}

/* ---------- Stacked fallback (mobile / reduced-motion / standalone) ---------- */
.process-timeline-wrapper { display: none; }
.process-timeline { display: flex; flex-direction: column; gap: var(--space-lg); }
.process-timeline__item {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: var(--space-md);
  align-items: center;
}
.process-timeline__number {
  font-family: var(--font-display);
  font-size: clamp(3.5rem, 8vw, 6rem);
  color: transparent;
  -webkit-text-stroke: 1.5px var(--gold-500);
}
@media (max-width: 720px) {
  .process-timeline__item { grid-template-columns: 1fr; }
}

/* Swap pinned scroll experience for the simple stacked timeline on narrow
   viewports and when the user prefers reduced motion. */
@media (max-width: 860px) {
  .process-scroll--pinned { display: none; }
  .process-timeline-wrapper { display: block; }
}
@media (prefers-reduced-motion: reduce) {
  .process-scroll--pinned { display: none; }
  .process-timeline-wrapper { display: block; }
}