/* ---------------------------------------------------------------
   The storyline layer: one fixed "stage" of mountain photographs
   behind the whole page, a pinned opening scene with three
   verticals, and the large footer. Loaded after main.css.
   --------------------------------------------------------------- */

/* ---------- The stage: one mountain, four moods ---------- */
.stage { position: fixed; inset: 0; z-index: 0; pointer-events: none; overflow: hidden; background: var(--ink-0); }
.stage__layer {
  position: absolute; inset: 0; opacity: 0; visibility: hidden;
  transition: opacity 1.6s var(--ease-in-out), visibility 0s linear 1.6s;
}
.stage__layer.is-on { opacity: 1; visibility: visible; transition-delay: 0s; }
.stage__layer img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: 50% 42%; }
.stage__fog {
  position: absolute; inset: -10% -30%; width: 160%; height: 120%;
  object-fit: cover; mix-blend-mode: screen; opacity: 0.22; will-change: transform;
}
.js .stage__fog { animation: fogdrift 90s linear infinite alternate; }
@keyframes fogdrift { from { transform: translate3d(-6%, 0, 0) scale(1.02); } to { transform: translate3d(6%, -2%, 0) scale(1.08); } }
.stage__scrim { position: absolute; inset: 0; background: linear-gradient(to bottom, rgba(7,9,12,0.42), rgba(7,9,12,0.28) 40%, rgba(7,9,12,0.62) 100%); }
/* Dark chapters sit transparently on the stage; paper and footer are opaque. */
body.has-stage { background: transparent; }
body.has-stage main { position: relative; z-index: 1; }
body.has-stage .chapter:not(.paper) { background: transparent; }
body.has-stage .site-footer { position: relative; z-index: 1; background: var(--ink-0); }
body.has-stage .chapter + .chapter { border-top-color: rgba(233,230,223,0.08); }
body.has-stage .site-header.is-scrolled { background: rgba(7,9,12,0.55); }
/* A soft ink veil on text-heavy dark chapters so long copy stays readable */
.veil { position: relative; }
.veil::before { content: ""; position: absolute; inset: 0; z-index: -1; background: rgba(7,9,12,0.7); }
.veil--deep::before { background: rgba(7,9,12,0.8); }
.veil--open::before { background: linear-gradient(to bottom, rgba(7,9,12,0), rgba(7,9,12,0.7) 45%); }
.veil--close::before { background: linear-gradient(to bottom, rgba(7,9,12,0.7), rgba(7,9,12,0.7) 60%, rgba(7,9,12,0.9)); }

/* ---------- The opening: pinned mountain with three verticals ---------- */
.peak { position: relative; height: 420vh; }
.peak__sticky { position: sticky; top: 0; height: 100vh; height: 100svh; overflow: hidden; }
.peak__intro { position: absolute; inset: 0; display: grid; place-items: center; text-align: center; padding: 8rem var(--gutter) 6rem; }
.peak__mark { display: inline-flex; align-items: center; gap: 1.6rem; }
.peak__name { font-family: var(--font-display); font-weight: 300; font-size: clamp(1.6rem, 1rem + 3.2vw, 3.6rem); letter-spacing: 0.42em; text-transform: uppercase; padding-left: 0.42em; line-height: 1; }
.peak__tag { margin-top: 1.6rem; color: rgba(235,232,225,0.72); font-family: var(--font-display); font-size: 0.8rem; letter-spacing: 0.3em; text-transform: uppercase; }
.peak__mark, .peak__tag { text-shadow: 0 2px 24px rgba(0,0,0,0.55); }
.peak__foot { position: absolute; left: var(--gutter); right: var(--gutter); bottom: 2rem; display: flex; justify-content: space-between; align-items: flex-end; font-family: var(--font-display); font-size: 0.625rem; letter-spacing: 0.26em; text-transform: uppercase; color: var(--text-on-ink-muted); }
.peak__foot .scroll-cue { display: inline-flex; align-items: center; gap: 0.9rem; }
.peak__foot .scroll-cue i { display: block; width: 1px; height: 38px; background: linear-gradient(to bottom, var(--accent), transparent); transform-origin: top; }
.js .peak__foot .scroll-cue i { animation: cue 2.4s var(--ease-in-out) infinite; }

.peak__verticals { position: absolute; inset: 0; display: grid; grid-template-rows: 1fr auto; padding: 7rem var(--gutter) 3rem; }
.peak__panels { position: relative; align-self: end; margin-bottom: 3rem; }
.peak__panel { position: absolute; left: 0; bottom: 0; max-width: 40rem; }
.peak__panel .kicker { margin-bottom: 1.2rem; }
.peak__panel .statement { max-width: 16ch; font-size: clamp(1.6rem, 1.1rem + 2.4vw, 3.6rem); margin-bottom: 1.2rem; text-shadow: 0 2px 30px rgba(0,0,0,0.5); }
.peak__panel .body { color: rgba(235,232,225,0.82); text-shadow: 0 1px 14px rgba(0,0,0,0.6); }
.peak__panel .tags li { color: rgba(235,232,225,0.6); }
.peak__panel .link { margin-top: 1.6rem; }
.js .peak__panel { opacity: 0; visibility: hidden; }
.js .peak__intro { will-change: opacity; }

.peak__tabs { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 0; list-style: none; margin: 0; padding: 0; border-top: 1px solid rgba(233,230,223,0.22); }
.peak__tab { display: block; padding: 1.2rem 1.2rem 0 0; text-align: left; position: relative; color: rgba(235,232,225,0.55); transition: color var(--dur-base); }
.peak__tab::before { content: ""; position: absolute; left: 0; right: 0; top: -1px; height: 1px; background: var(--accent); transform: scaleX(0); transform-origin: left; transition: transform 0.8s var(--ease-out); }
.peak__tab.is-active { color: var(--text-on-ink); }
.peak__tab.is-active::before { transform: scaleX(1); }
.peak__tab .n { display: block; font-family: var(--font-mono); font-size: 0.7rem; letter-spacing: 0.1em; color: var(--text-on-ink-faint); margin-bottom: 0.4rem; }
.peak__tab .t { display: block; font-family: var(--font-display); font-size: clamp(0.85rem, 0.7rem + 0.5vw, 1.1rem); letter-spacing: 0.18em; text-transform: uppercase; }
.peak__tab .s { display: block; margin-top: 0.3rem; font-size: 0.8rem; color: rgba(235,232,225,0.5); max-width: 22em; }
.peak__tab:hover { color: var(--text-on-ink); }
.js .peak__verticals { opacity: 0; visibility: hidden; }

/* Small screens: no stage, no pin. The opening is one image, the verticals stack. */
.peak__mobile-img { display: none; }
@media (max-width: 860px) {
  .stage { display: none; }
  body.has-stage { background: var(--ink-0); }
  body.has-stage .chapter:not(.paper) { background: var(--ink-0); }
  .peak { height: auto; }
  .peak__sticky { position: static; height: auto; overflow: visible; }
  .peak__intro { position: relative; min-height: 100svh; }
  .peak__mobile-img { display: block; position: absolute; inset: 0; z-index: -1; width: 100%; height: 100%; object-fit: cover; }
  .peak__intro::after { content: ""; position: absolute; inset: 0; z-index: -1; background: linear-gradient(to bottom, rgba(7,9,12,0.5), rgba(7,9,12,0.2) 40%, var(--ink-0) 100%); }
  .peak__verticals { position: static; display: block; padding: 4rem var(--gutter) 2rem; }
  .js .peak__verticals { opacity: 1; visibility: visible; }
  .peak__tabs { display: none; }
  .peak__panels { margin: 0; }
  .peak__panel { position: static; padding: 2.5rem 0; border-top: 1px solid var(--ink-line); }
  .js .peak__panel { opacity: 1; visibility: visible; }
  .veil::before { display: none; }
}

/* ---------- Product panels get the demo frame ---------- */
.product .demo { width: 100%; }
.products-intro .lead { max-width: 30em; }
.product__feeds { font-size: 0.85rem; color: var(--text-on-ink-faint); margin-top: 1.2rem; max-width: 30em; }
.product__feeds b { color: var(--text-on-ink-muted); font-weight: 500; }

/* ---------- Large footer ---------- */
.site-footer { padding: 5rem 0 2.5rem; }
.site-footer .wrap { display: block; }
.footer__grid { display: grid; grid-template-columns: 1.4fr repeat(4, minmax(0, 1fr)); gap: 3rem 2rem; padding-bottom: 3.5rem; border-bottom: 1px solid var(--ink-line); }
.footer__brand p { font-size: 0.9rem; color: var(--text-on-ink-muted); max-width: 24em; margin-top: 1.4rem; }
.footer__col h4 { font-family: var(--font-display); font-size: 0.625rem; letter-spacing: 0.24em; text-transform: uppercase; color: var(--text-on-ink-faint); margin-bottom: 1.2rem; font-weight: 500; }
.footer__col ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 0.7rem; }
.footer__col a { font-size: 0.92rem; color: var(--text-on-ink-muted); transition: color var(--dur-fast); }
.footer__col a:hover { color: var(--text-on-ink); }
.footer__col .ext::after { content: " \2197"; font-size: 0.8em; color: var(--text-on-ink-faint); }
.footer__bottom { display: flex; justify-content: space-between; align-items: center; gap: 2rem; flex-wrap: wrap; padding-top: 2rem; }
.footer__bottom .small { font-family: var(--font-display); font-size: 0.625rem; letter-spacing: 0.22em; text-transform: uppercase; color: var(--text-on-ink-faint); display: flex; gap: 1.6rem; flex-wrap: wrap; }
.footer__bottom .small a:hover { color: var(--text-on-ink); }
@media (max-width: 1000px) { .footer__grid { grid-template-columns: repeat(2, minmax(0, 1fr)); } .footer__brand { grid-column: 1 / -1; } }
@media (max-width: 520px) { .footer__grid { grid-template-columns: 1fr; } }

/* Phases on paper */
.paper .phases, .paper .phase { border-color: var(--paper-line); }
.paper .phase .mono { color: var(--text-on-paper-faint); }
.paper .phase .numeral { color: var(--text-on-paper-faint); }

/* Keep the intro's bottom margin inside the section so the veil covers it (no collapse gap) */
.products-intro { padding-bottom: 1px; }
.products-intro .chapter-head { margin-bottom: clamp(2rem, 4vw, 4rem); }

/* No JavaScript, or motion disabled: the opening stacks like the phone layout */
html:not(.js) .peak { height: auto; }
html:not(.js) .peak__sticky { position: static; height: auto; overflow: visible; }
html:not(.js) .peak__intro { position: relative; min-height: 100svh; }
html:not(.js) .peak__verticals { position: static; display: block; padding: 4rem var(--gutter) 2rem; opacity: 1; visibility: visible; }
html:not(.js) .peak__tabs { display: none; }
html:not(.js) .peak__panels { margin: 0; }
html:not(.js) .peak__panel { position: static; padding: 2.5rem 0; border-top: 1px solid var(--ink-line); opacity: 1; visibility: visible; }
html:not(.js) .peak__mobile-img { display: block; position: absolute; inset: 0; z-index: -1; width: 100%; height: 100%; object-fit: cover; }
html:not(.js) .peak__intro::after { content: ""; position: absolute; inset: 0; z-index: -1; background: linear-gradient(to bottom, rgba(7,9,12,0.5), rgba(7,9,12,0.2) 40%, var(--ink-0) 100%); }
html:not(.js) .stage { display: none; }
html:not(.js) body.has-stage, html:not(.js) body.has-stage .chapter:not(.paper) { background: var(--ink-0); }