/* Scroll film — a pinned cinematic clip the visitor scrubs with their scroll,
   with chapter copy that reads over it. Theme via --sf-* custom properties. */
.sf { position: relative; width: 100%; }
.sf__stage { position: sticky; top: 0; height: 100vh; height: 100dvh; overflow: hidden; background: var(--sf-bg, #0b0b0c); }
.sf__media { position: absolute; inset: 0; }
.sf__media img, .sf__media video {
  position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: var(--sf-pos, 50% 50%);
}
.sf__media video { opacity: 0; transition: opacity .6s ease; }
.sf__media[data-painted="true"] video { opacity: 1; }
.sf__shade { position: absolute; inset: 0; pointer-events: none;
  background:
    linear-gradient(180deg, color-mix(in srgb, var(--sf-bg, #0b0b0c) 78%, transparent) 0%, transparent 28%, transparent 70%, color-mix(in srgb, var(--sf-bg, #0b0b0c) 92%, transparent) 100%),
    radial-gradient(60% 70% at 18% 50%, color-mix(in srgb, var(--sf-bg, #0b0b0c) 72%, transparent) 0%, transparent 70%);
}
.sf__chapter { position: absolute; inset: 0; display: flex; align-items: center; padding: clamp(72px, 10vh, 120px) clamp(20px, 6vw, 96px); opacity: 0; pointer-events: none; }
.sf__chapter[data-align="center"] { justify-content: center; text-align: center; }
.sf__chapter[data-align="right"] { justify-content: flex-end; }
.sf__chapter.is-active { pointer-events: auto; }
.sf__copy { max-width: 640px; will-change: transform, opacity; }
.sf__kicker { display: inline-flex; align-items: center; gap: 10px; font-size: 12px; letter-spacing: .18em; text-transform: uppercase; color: var(--sf-accent, #d4a533); margin-bottom: 18px; }
.sf__kicker::before { content: ""; width: 28px; height: 1px; background: var(--sf-accent, #d4a533); }
.sf__chapter[data-align="center"] .sf__kicker::before { display: none; }
.sf__title { font-size: clamp(34px, 5.2vw, 72px); line-height: 1.02; letter-spacing: -.02em; color: var(--sf-ink, #fff); margin: 0; }
.sf__body { margin: 20px 0 0; font-size: clamp(16px, 1.25vw, 19px); line-height: 1.6; color: var(--sf-muted, rgba(255,255,255,.72)); max-width: 56ch; }
.sf__actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.sf__chapter[data-align="center"] .sf__actions { justify-content: center; }
.sf__progress { position: absolute; left: 0; right: 0; bottom: 0; height: 2px; background: color-mix(in srgb, var(--sf-ink, #fff) 12%, transparent); }
.sf__progress > span { display: block; height: 100%; width: 100%; transform-origin: left; transform: scaleX(var(--sf-progress, 0)); background: var(--sf-accent, #d4a533); }
.sf__steps { position: absolute; right: clamp(16px, 3vw, 40px); top: 50%; transform: translateY(-50%); display: flex; flex-direction: column; gap: 10px; }
.sf__steps button { width: 10px; height: 10px; border-radius: 999px; border: 1px solid color-mix(in srgb, var(--sf-ink, #fff) 45%, transparent); background: transparent; padding: 0; cursor: pointer; transition: background .3s, transform .3s; }
.sf__steps button[aria-current="step"] { background: var(--sf-accent, #d4a533); border-color: var(--sf-accent, #d4a533); transform: scale(1.25); }
.sf__cue { position: absolute; left: 50%; bottom: 22px; transform: translateX(-50%); display: flex; align-items: center; gap: 8px; font-size: 11px; letter-spacing: .2em; text-transform: uppercase; color: var(--sf-muted, rgba(255,255,255,.6)); opacity: calc(1 - var(--sf-progress, 0) * 6); }
.sf__cue i { display: block; width: 1px; height: 28px; background: linear-gradient(var(--sf-accent, #d4a533), transparent); animation: sf-cue 1.6s ease-in-out infinite; }
@keyframes sf-cue { 0%, 100% { transform: scaleY(.4); transform-origin: top; opacity: .3 } 50% { transform: scaleY(1); opacity: 1 } }
@media (max-width: 860px) {
  /* Phones: the clip is a portrait cut, so keep the top two-thirds of the frame
     clear and carry the copy on a bottom-weighted shade only. */
  .sf { height: calc(var(--sf-n, 3) * 80vh + 160vh) !important; }
  .sf__chapter { align-items: flex-end; padding: 0 20px 64px; }
  .sf__steps { display: none; }
  .sf__media img, .sf__media video { object-position: var(--sf-pos-mobile, var(--sf-pos, 50% 50%)); }
  .sf__shade {
    background: linear-gradient(180deg, color-mix(in srgb, var(--sf-bg, #0b0b0c) 55%, transparent) 0%, transparent 16%, transparent 46%, color-mix(in srgb, var(--sf-bg, #0b0b0c) 82%, transparent) 72%, color-mix(in srgb, var(--sf-bg, #0b0b0c) 96%, transparent) 100%);
  }
  .sf__title { font-size: clamp(30px, 9.2vw, 40px); }
  .sf__body { font-size: 15.5px; line-height: 1.5; margin-top: 14px; }
  .sf__kicker { margin-bottom: 12px; }
  .sf__actions { margin-top: 20px; gap: 10px; }
  .sf__cue { bottom: 14px; }
}
@media (prefers-reduced-motion: reduce) {
  .sf__stage { position: relative; height: auto; min-height: 70vh; }
  .sf__chapter { position: relative; opacity: 1 !important; transform: none !important; min-height: 60vh; }
  .sf__cue, .sf__steps { display: none; }
}